bluuebunny/crossref_metadata_2025 huggingface dataset:
Determination of Torsional Mode and Analysis of Torsional Resistance
Authors: Gao Hua Bin , Zhang Yong Sheng
Published: October 2012

At present, structural designers have many different views on determination of torsional mode. This paper adopts the structural mode factor and the mass participation factor method to determine structure torsional mode. Use the shear correction to simplify the calculation of structure torsion, derivate the relevant formulas of torsional effect, it has guide significance for manual calculation of structural torsion; Analysis of structural torsion resistant measures finally.
The Theory and Case Study of Axle Load Identification Based on BWIM of Orthotropic Steel Deck
Authors: Yang Guang , Chen Wei Zhen , Xu Jun
Published: October 2012

In China recent accidents of sudden collapses of in-service bridges have aroused great concern about the real traffic load and bearing capacity of existing bridges. The proper management of existing bridges relies on accurate information of bridge operating load which is essential for correct assessment of operation and safety of bridges. An integrated load identification system for operating traffic which is built on characteristics of orthotropic steel deck, that is, the locality of stress influence line of orthotropic steel deck, and is based upon BWIM technique to establish functional relation between axle load and stress history, Case study of stress monitoring was carried out on two truss bridges with orthotropic steel deck under both controlled and normal traffic conditions to verify the system. In the case of controlled traffic, monitored information was used to back calculate axle load. The load information was compared with synchronous video recording of the traffic to check inversely calculated data about wheel weight and its lateral deviation between actual condition, The results show that the established identification system is accurate and valid. In the case of normal traffic, monitored stress data were used to back calculate axle load and wheel lateral distribution. From the results, axle load spectrum is abstracted and can directly help assessment of real load capacity and fatigue life of the bridge.
Construction Control Technology of Drilling and Blasting Method in Multi-Arch Tunnel
Authors: Zhao Ji Liang
Published: October 2012

This paper based on a highway reconstruction projects. It puts forward the construction control measures of over-excavation and undercut in process of construction with Drilling and Blasting Method of multi-arch Tunnel, and analyzed the effect of the blasting vibration to middle wall and supporting structure. It also points out that shock absorption should be adopted in the construction. At last, it discussed the problems needing attention in the construction process of the middle wall.
Simulation and Analysis of Frost Heave Force for Tunnel Lining
Authors: Liu Jun Xin , Hu Qi Jun , Liu Yu Tian , Long Zhi Wei
Published: October 2012

With the high-latitude and high-altitude tunnel built, researches on frost damage mechanism of the tunnel and prevention countermeasures have become imperative. By numerical simulation of tunnel lining-scaled model at different temperature boundary conditions, changes of the stress state with no insulation material and insulation materials of poly phenolic under water-saturated and natural conditions were discussed. Through the analysis, it’s indicated that the tunnel waterproofing and insulation are equally important in the alpine region. The results has important reference and guidance significance in design and construction of the tunnel under cold weather conditions.
The Probe Technology and Counter Measures of Goaf of Colliery Area in Tongluoshan Tunnel
Authors: Zhang Xin Bin
Published: October 2012

During the construction of Tongluoshan Tunnel of the 6th light rail line in Chongqing, collapse of goaf of colliery area occurred which affects the construction and permanent safety heavily. Advanced geological prediction were done with ground penetrating radar to probe the goaf’s location, scale and characters of underground water and filling articles, then countermeasures such as advanced pipe roof supporting, goaf stowing, wall rock and filling articles’ voids grouting was applied；after that，supporting plan was adjusted to ensure construction safety with the data from monitoring whose result proves the availability of above prediction technology and countermeasures to similar goaf.
Research on Safety Inspection of Electric Cable Tunnel with Masonry Structure
Authors: Zhai Chuan Ming , Han Qing Hua , Lu Yan , Jin Rui
Published: October 2012

According to inspection and assessment technology and method for the ground masonry structure, this paper presents the inspection method and results for an electric cable tunnel with masonry structure. The contents of the inspection include masonry bricks strength grading, masonry mortars strength grading, concrete strength for crest slab, reinforcement of crest slab and appearance of masonry structure. And the technologies for identification are introduced. Therefore, the key problems for safety inspection of electric cable tunnel with masonry structure are solved. The inspection items, process and identification technologies presented in this paper are effective and applicable for electric cable tunnel with masonry structure.
Study on Close Coal Seam Pressure Behavior Law of Zhong Xing Mine by Physical Model
Authors: Cai Guang Shun , An Li Qian , Zhu Xin Xin , An Ji Li , Mao Ling Tao
Published: October 2012

Based on the actual geological data of the 1202 lower layer work face of the Zhong Xing mine, in Shanxi province, a physical similar simulation model has been built to analyze the influence on the lower coal layer after mining the upper layer, and research on the deformation, failure law and the stress distribution of overburden rock. The results show that after mining the upper coal layer, overburden rock experienced subsidence, separation, bending and even breaking down, and the original state of the rock destroyed. The rock's intensity is weaken, and the whole rock has been softened. When the distance of the coal layers becomes smaller, the influence of the mutual exploitation becomes larger. Those results provide a reference for reasonable layout of the mining of the coal seam working face.
Numerical Analysis on the Evolutionary Features of Deformation and Failure Modes of Slope
Authors: Tang Xiao Song , Zheng Ying Ren , Tang Hui Ming
Published: October 2012

The failure of slope is a gradual accumulation process. Under the effect of many interior and exterior factors, some parts in the slope reach yield with the increase of stress; sliding surface forms gradually till complete transfixion; with the plastic strain continuous increases, overall failure happens on the slope. Traditional analysis method cannot display the mechanic conditions and the whole process of deformation, transfixion of sliding surfaces and failure. Meanwhile, FEM strength reduction can quantitatively show the deformation features and the process of occurrence and development of sliding surface. Based on the previous researches, the paper classifies slopes according to the features of rock and soil and the slope structure. Through analyzing the graphs of deformation and the nephograms of plastic strain under different reduction factors or safety factors, the researchers can directly find the deformation tendency of slopes and the whole process of the extension, transfixion and failure of sliding surface with the reduction of safety factor. So, the failure mechanism of slope can be found intuitively, which can provide effective basis for the prevention and governance of slopes.
The Numerical Experimental Investigation on Damage Zone of Surrounding Rock of Deep Tunnel Based on the Elastic-Plastic-Brittle Constitutive Model
Authors: Wang Da Guo , Miao Jin Xi , Li Qiang
Published: October 2012

A particular elastic-plastic-brittle constitutive model, considering the heterogeneity of rock and the features of deep engineering, is presented, in which the multiple yield criteria based on stress space and ductile failure criteria based on strain space are adopted, and the numerical method is FEM. Through the simulation of the compression test of rock samples, the results show that the present model is rational and accurate. The elastoplastic damage mechanism of the surrounding rock mass of deep tunnel is studied and through the display of centralization, extension and transfer of stresses, it is shown that the present model can be used to predict reliably the whole process of formation of broken zone.
Numerical Analysis of Deformation Influence of Horizontal Adit Construction on Main Tunnel Intersection Structure
Authors: Sun Zhi Jie
Published: October 2012

The 3D finite element simulation are adopted to study the surrounding rock deformation regularity of main tunnel during the horizontal adit construction stage．The Zhongtiaoshan highway tunnel is taken as an example. The research results are shown as follows：Horizontal adit excavation destroys the original arching effect of the main tunnel, which leads to stress concentration at the intersection of primary supporting structure. The first excavation step plays an important play in the surrounding rock deformation of the intersection. The influence range of the main tunnel which due to the horizontal adit excavation is 1.2D.
Study on Effects of Metro Tunnel Enlarged from Air Defense Tunnel on Adjacent Piles and Control Measures
Authors: Yao Xi Ping , Gong Quan Mei , Jia Jian , Shen Chen
Published: October 2012

Based on project in which the existing air defense tunnel was enlarged to build a metro tunnel adjacent to bridge piles in Harbin, the 3-D numerical simulation using FEM was conducted to analyze the internal forces and deformations of piles. The results show that the internal forces and deformations on the right side are larger than those on the left after the enlarged excavation on a single side on sidewalls. The maximum value as well as its position differs according to the distance between the pile and tunnel. After the enlarged excavation on the invert, the increase in the horizontal displacement is smaller than that after the excavation on the sidewall. As to the vertical displacement and axial force, the increase is prominent and the increasing value is larger than the excavation on the sidewall. After the reinforcement measures of advanced pre-supporting and radial grouting are used, According the results, the internal forces and deformations of piles decreases after measures were taken. Compared with measured data on site, the control effect is good.
A Dynamics Optimization of Scheduling for Excavating Development Project in Complicated Ore Mining below Railway Special Line
Authors: Jiang Li Chun , Hu Liu Qing , Ren Xiao Hui
Published: October 2012

Disturbance of ground structures by the excavation of underground engineering is a non-linear mechanical behavior process. To find time sequence with the smallest disturbance is important for the safety of mining below railway, river, and building (three-underground mining). A numerical simulation was carried out by 3DEC in mining area. The maximum Lyapunov indices are obtained from the time curves of the maximum unbalanced force. The reasonable time sequence schemes of development project construction under railway in the east ore body of XinQiao Pyrite Mine are compared. The results show that the effect of the data analysis method about the information of unbalanced force-time record based on the chaotic dynamics theory is very positive. It can minimize the risk of scheme with the priority of single mechanical (displacement) index, direct the actual construction effectively and guarantee the safety of ‘three-underground’ complex ore mining by preventive actions in supporting, shortening construction time and other strong measures.
Roadway Supporting Technology in Fully Mechanized Workface with Large Mining Height of Specially Thick Coal Seam in Datong Mining Area
Authors: Lu Guo Liang , Wang Chen , Jiang Yao Dong , Wang Hong Wei
Published: October 2012

Aimed at the supporting problems in the fully mechanized roadway with large mining height of the specially thick coal seam in workface 8105 in Tashan coal mine, the “three highs with one low” supporting technology of high strength, high stiffness, high reliability and low support density was adopted to solve the roadway supporting problems of specially high coal side and specially large section and effectively control the surrounding rock deformation and ensure the roadway safety. It also increased the roadway excavation speed which made good conditions for fast advance of the fully mechanized workface, and it made the soft-rock roadway supporting technology in Datong mine area develop into a new level.
Application and Research on New Technology of Foam Lightweight Soil in Treatment of Soft Soil Foundation of Railway Engineering
Authors: Li Zi Lin , Zhang Kai Feng
Published: October 2012

Foam lightweight soil is a new type of material appearing in recent years, whose advantages are paid more and more attention to by engineers and it will have broad application prospect in the engineering. An in-depth study application of foam lightweight soil in the complex of railway soft soil foundation treatment what based on a railway foundation project in Tianjin, this paper discusses the actual application state of foam lightweight soil in handling of special railway soft soil foundation. Through in-depth analysis of the advantages of a foam lightweight soil, optimization of construction replacement thickness and moisture density, discussion on construction of it, we can find large advantages of foam lightweight soil as replacement material in the complex railway soft soil foundation treatment, and provide new ideas about processing complex soft foundation.
Research on Technology of Highway Curve and Slope Road Segment Alignment Safety Design
Authors: He Jiao Long , Chen Shu Guang , Zhang Xin Sheng
Published: October 2012

In the paper, Combination curved with slope road segment on the driving experiment , The paper is analyzed the curve and slope road segment on Gradient, Horizontal Curve Radius, Speed and heart rate these variables of the inherent relation and law. The model of the relationship of the longitudinal slope and horizontal curve radius and heart rate is set up. By employing regression analysis, Conduct quantitative analysis, calculation and can be determined by the minimum horizontal curve radius value of vertical slope corresponding to at different vehicle-speeds on curved with longitudinal slope,Theoretical reference is provided for designers in the design technology research.
Application of Combined Anti-Slide Micro-Piles to Control of a Landslide in Xining-Jiuzhi Highway
Authors: Tang Sheng Li , Zhou Le , Wu Zhang , Dang Xiao Long
Published: October 2012

It is a new trend to control landslide by using anti-sliding composite structure of micro-piles combined with other engineering measures. It has been applied in many engineer practices for its convenient, less cost, and high landslide stability increased obviously by the pressure grouting. The paper discussed formation lithology, geologic structure and hydrogeology features of Xining-Jiuzhi highway as an example, according to the specific circumstance of sliding zones in superficial layer and deep layer, we proposed a comprehensive landslide treatment, combined with anti-sliding composite structure of micro-piles, anchor cable frame reinforcing and inclined drain holes. On the basis of analyzing the effect and theory of consolidating the slide by anti-sliding composite structure of micro-piles, we adopted the numerical model of lagrange finite-difference analyzing the stability of landslides and the load-carrying properties of the reinforced structure before and afterwards comparatively. The calculated results and monitoring showed that: the landslides were stable, and the comprehensive treatment of using anti-sliding composite structure of micro-piles has met the expectant control effects.
Research on the Crashworthiness of Neotype Flexible Safety Fence
Authors: Lei Zheng Bao , Li Li Hong , Lei Mu Xi , Chen Chen Chen
Published: October 2012

In order to identify the crashworthiness of neotype flexible safety fence, methods was created by conducting FEA (finite element analysis) computer simulation and full-scale impact test based on the current available evaluation standard. Above all, the model of “vehicle-guardrail” was set up based on virtual proving ground (VPG) pretreatment software, the safety in the impact between vehicle and neotype flexible safety fence were studied from the aspects of the moving locus of vehicle, the acceleration of vehicle and the maximum lateral displacement of guardrail etc. Secondly, full-scale impact test was conducted for the guidance quality of guardrail to the tested vehicle. The test results indicated that the neotype flexible safety fence was inconspicuous to the tested-car, which was basically the same to the simulation results, and the evaluation parameter of guardrail met the acceptance criteria.
The Feasibility Experimental Study about Bamboo Reinforcement Applied in Concrete Pavement
Authors: Chen Xiang , Chen Bo Wang , He Ran
Published: October 2012

As a result of plain concrete pavement cracking phenomenon is more serious, leading to the late maintenance and repair costs are higher, resulting in the national great economic losses, it has taken many measures to alleviate the damage of pavement, of which the most widely used reinforced concrete. The use of reinforced concrete materials can effectively delay the pavement cracking phenomenon, but its cost is high. In this paper we consider the use of bamboo reinforcement in concrete pavement instead of steel, and compare the bending test of the two kids of board, the bamboo reinforced concrete board and a concrete board. The experiment indicated that, compared with ordinary concrete board, the ultimate strength of bamboo reinforced concrete plate has been grew 87.5%, and reinforced concrete plate has certain signs before failure, so the concrete reinforced with bamboo ribs can prolong the concrete crack time, but also greatly improve the concrete pavement flexural strength and crack resistance. Bamboo reinforcement applied in concrete pavement is entirely feasible, and it is good of the application development prospect about bamboo reinforcement.
The Reason and Control Method of Road Frost Boiling
Authors: Li Hong Dong
Published: October 2012

spring is the serious road frost boiling season in Hrbin city. When passing the boiling road vehicle slow down and the person detour as much as possible. The repair of the boiling road will cost much money and time, and the same road section. In the text the reason of boiling and the influence are described, at last the prevention method is intrudced.
Research on Speed Target Value of Railway Engineering
Authors: Ran Mao Ping , Yang Xiao Yu
Published: October 2012

The composition scheme of speed target value of railway engineering contains the functional orientation of railway line,demand of time target value and the adaptation to the adjacent lines. The selected speed target value of railway engineering must be suited to the features of the railway, satisfied with transport requirement, accorded to railway developing strategy and realized to the best economic benefit.This paper comprehensively compares and analyzes different speed target value schemes adopted by Revamping project for Capacity expansion of WANGAN railway and a reasonable speed target value—200km/h reserved 250 km/h is recommended.
Discussion on Using Waste Freeway Lime-Flyash Stabilized Aggregate
Authors: Fan Sheng Wei
Published: October 2012

This paper provides a theoretical foundation for the recycling of waste freeway lime-flyash stabilized aggregate by testing its basic character. It gives a recommended thickness for renewable lime-flyash stabilized aggregate used in the base and subbase of all levels of highway and pavement structure. It also proposes an appropriate mixture ratio of the base construction.
Study on CR Point Identification in SAR Images
Authors: Xing Xue Min
Published: October 2012

In the algorithm of Corner Reflector Interferometric Synthetic Aperture Radar (CR-InSAR), the identification of Corner Reflector (CR) points in SAR images is necessary. Due to the uncertainty of traditional method in estimating the row and column information of CR, this paper presents a method for CR points’ identification, which is based on the intensity and correlation coefficient. The method has been successfully used to find the CR points in the six SAR images of the study area where the identification of CR points installed along a high way is difficult. The results show that the method presented is effective and reliable which will play important role in the deformation monitoring in highway using CR-InSAR algorithm.
The Analysis of Development and Utilization along the Rail Transit in Qingdao Economic and Technological Development Zone
Authors: Dai Peng , Yue Yan
Published: October 2012

With the rail transit project planning and construction in Qingdao, the citizen’s lives will be profoundly influenced. Rail transit will not only promote the urban lands along the railway further development, but also assemble a large number of commercial, financial and office facilities. This essay, based on the investigation of the present development and construction of the central business district along Changjiang Road in Qingdao Economic and Technological Development Zone(Qingdao ETDZ),analyzes the current land use within 500 meters on both sides of the planned railway, and the present commercial status in rail-affected area as well as investment intentions of those potential investors, discusses the form of commercial presence along the rail transit, and then predicts the further development of the central business in Qingdao ETDZ.
Analysis on Void Beneath Curling Slab in Rigid Base Cement Concrete Pavement and Fatigue Life Prediction
Authors: Zhang Qing , Sun Yun Chen , Li Jing Jing
Published: October 2012

The damages in two rigid base cement concrete pavement were investigated. The data analysis suggests that the void beneath curling slab resulting from the temperature gradient changing leads to pavement damages. With the benefit of the pavement curling structure numerical model established in this article, the void changing law beneath curling slab and loading stress were analyzed. The loading stress level increases dramatically due to void occurring beneath curling slab. The calculation method of loading stress in the curling slab was given. The fatigue life analysis further reveals that the void beneath curling slab caused by temperature gradient changes is the fundamental reason for the decreasing of the service life of cement concrete pavement. The service life of investigating section were predicted and analyzed according to the fatigue life prediction model established in this article and the survey data.
Treatment Mechanism Research on the Roadbed Widening with Geosynthetics
Authors: Jiang Kang , Gao Fu Liang , Fang Wei
Published: October 2012

In order to reduce the differential settlement and improve the stability of the subgrade when widening the old roadbed，the geosynthetics have been successfully adopted in the joint between the old and new subgrades. Based on the features of the geosynthetics-reinforced old road widening, the old and new subgrades and the pavement were regarded as a whole structure, and the numerical model was established on the basis of the assumption. By FLAC, the mechanism of geosynthetics-reinforced old road widening was discussed, the different effects under the different layer numbers of geosynthetics and roadbed filling height were studied, mainly from the aspects of displacement and surface stress of subgrade. The results show that geosynthetics not only effectively reduce the differential settlements and horizontal displacements of subgrade top, but also lessen and homogenize the average stress reflected from subgrade to pavement.
Comparison for Support Patterns of Temporary Shaft for Construction in Silty Clay
Authors: Cui Yi Xiao , Jia Jian , Zhou Shun Hua
Published: October 2012

Based on a temporary shaft for construction, this paper compared two supporting patterns in the geological condition dominated by silty clay, the open-cut method with tunneling support and the bored piles supporting method, in the respects of ground surface deformation, the envelope structure deformation and the steel brace forces, using the numerical simulation method. And by comparison of the numerical results with the monitoring data, it is verified that the calculation model and methods of analysis are rational. Furthermore, the open-cut method with tunneling support is recommended as the better supporting method that can both ensure the structure safety and economy in areas of similar geological conditions. The paper has some reference value for shaft supports under similar construction conditions.
Feasibility Analysis on Implement of Freeze Roadway Cooling Technology in Coal Mine of Heilongjiang Province
Authors: Zhou Jing , Liu Xi Ming , Qin Xian Li , Xing Shu Ren
Published: October 2012

Freeze roadway cooling technology is delivering cold quantity to cooling underground face by storage cooling energy in strata, and the effect of storaging cold is critical. The geographical position and geological condition of coal mine in Heilongjiang Province has remarkable characteristics. The feasibility of freeze roadway cooling measure was demonstrated on temperature, geothermal, constant temperature strata and frozen soil layer, etc. by analyzed its advantage adequately. The measure provides a new idea which suits the native situation for prevent the heat-harm in coal mine, it also has the realistic reference value and is worth popularizing.
Analysis of Weighting Coefficients of Post-Assessment Indexes for Cold Recycling Engineering of Asphalt Pavement Based on Hierarchy Analytic Procedure
Authors: Zhang Min Jiang , Zhang Wen Bo , Yu Bao Yang
Published: October 2012

Based on the theory of hierarchy analysis, the post-assessment indexes system of cold recycling technology project have been established, and the hierarchy analytic procedure have been used to determine the weighing coefficients for post-assessment indexes of cold recycling engineering of asphalt pavement, and the weighing values for various levels factors were given for the cold recycling base layer project of highway of Shenyang-Yingkou. Considering the road performance and economic benefit, societal and environmental benefit, the analytic hierarchy procedure (AHP) method can effectively avoid making wrong decisions subjectively and made it more scientific and reasonable to determine the weighing values of post-assessment indexes, and it is an effective method to determine the weighing values for post-assessment indexes of the cold recycling technology project.
Mathematical Logarithmic Model for Predicting Noise of Simply-Supported PC-Box Girder in High-Speed Railway
Authors: Li Xiao Zhen , Wu Jin Feng , Zhang Xun , Liu Quan Min , Zhang Zhi Jun
Published: October 2012

When a train runs across a bridge, vibration energy is transmitted from the track structure into the bridge deck and other components which act as different size of ‘sounding boards’. These ‘sounding boards’ also radiate noise, namely, re-radiated noise, which results in ‘hot spots’ in noise maps for bridge sections. Based on the field tests on the noise of 32m double line simply-supported PC-box girder serviced in Chengdu-Dujiangyan High-speed Railway (CDHR) in China, mathematical logarithmic equation for predicting the equivalent A-weighed noise level (LA,eq) is proposed. Predicted results are compared with field ones and the non-parametric tests including two-related samples Wilcoxon and two-independent samples Kolmogorov–Smirnov are carried out, indicating satisfactory results and verifying the reliability of theoretical model. Analysis shows that equivalent A-weighed noise level detects no significant difference between the model predictions and the field measurements at the confidence level of 95%.
Research and Application Prospect on Cold Recycling Technology of Asphalt Pavement
Authors: Liu Ming Hui
Published: October 2012

Abstract. Cold recycling technology is applied to road rehabilitation in the recent years, and it has the advantages of mixture without heating, high RAP availability, low cost, quick speed of construction etc. Cold in-place recycling technology in this paper has been summarized including applied scope, cold recycling layer type, additives and new aggregates. We gives a detailed comparison and analysis to cold recycled mixture design method, and points out important design indexes. Combined with practical engineer of the technology in China, it analyzes application prospect and development trend on cold recycling technology.
The Ageing Characteristics of Base Asphalt under UV in the Construction of the Airport
Authors: Ye Song , Zhou Zheng Fei
Published: October 2012

In order to research how the strong ultraviolet impact on the performance of base asphalt, it utilizes the chambers of ultraviolet ageing environmental to simulate the field ageing conditions. The high temperature properties of base asphalt under different time of ultraviolet irradiation is researched by the SHRP equipment. The results show that the influence of high temperature performance is relatively small when the base asphalt under the strong ultraviolet rays, and it has a closer relationship with the ageing time. The value of G*/sinδ that is anti-rutting factor increase 87.2% at most.
Study the Performance of Coal Gangue Filling in the Road Embankment
Authors: Shen Wen Sheng , Zhao Peng , Wang Xuan Cang , Wang Ji Chang
Published: October 2012

Coal gangue is a byproduct of mining process, filling the gangue in the road embankment can reduce the pollution caused by the gangue accumulation. Because the formation and type of rock is different, the performance of gangue is different. In this paper, the main types of gangue of Handan & Xingtai coal mining area was taken laboratory test, the mechanical properties and chemical properties of different gangues were compared to determine the feasibility of gangue filling in the road embankment, and the performance law of coal gangue.
Seismic Response Analysis of Long Span Cable-Stayed Bridge by Response Spectrum Method
Authors: Jin Min Chao , Wang Bao Fu , Feng Zhong Ren , Wang Xiong Jiang
Published: October 2012

Based on response spectrum method, the seismic behavior of a long span cable-stayed bridge is investigated through three dimensional finite element model established by ANSYS. By calculating the cumulative effective mass factors of the bridge, the minimum number of modes used for modal superposition analysis is obtained. Design acceleration response spectrums under two probabilities are used in the analysis. The response spectrums are input in the bridge longitudinal direction, vertical direction, transverse direction and combined horizontal and vertical directions. Displacements and internal forces results show that vertical component of the ground motion greatly influences the response of the bridge and there is significant difference between the results of the two probabilities.
Nonlinear Analysis on the Anchor Board of the Cable-Girder Anchorage Zone of a Cable-Stayed Bridge
Authors: Chen Yan Jiang , Xie Rong Hai , Yan Wei Ming , Li Yong , Xu Wei Bing
Published: October 2012

The cable-girder anchorage zone of cable-stayed bridge is vital to the safety of the entire structure. Aiming at uniformly conveying the vehicle and populaiton load as well as the load of the main girder to the cables, this zone shows unique characters with concentrated and massive loads, complex structures, comprehensive load paths and non-uniformly stress distributions. This paper established the 3D finite element modal for the Ronggui Cable-Stayed Bridge. A nonlinear analysis on its anchorage zone has been conducted to provide reasonable references for future design and optimization.
Effects on the Hydrodynamics Caused by Artificial Islands of the Hong Kong-Zhuhai-Macao Bridge
Authors: Ji Rong Yao , Xu Qun , Jia Liang Wen , Mo Si Ping
Published: October 2012

Hong Kong-Zhuhai-Macao Bridge will cross Lingding navigation channel in the form of immersed tunnels, with two large artificial islands to provide change-over facilities between bridge and tunnel. In order to predict the effects on the hydrodynamic environment caused by the artificial islands, the physical model for the Bridge is built to analyze the changes of the tidal level and tidal current. The experimental results show that the drag force on flow is increased and the flow section area is decreased by the two large artificial islands built in the sea. Near both ends of the artificial islands, the velocities of tidal currents increase. The opposite side of the artificial islands, there is the recirculation zone with many vortexes in different scales, which have the periodic change from formation to disappearance. Affected by the topography, hydrodynamic conditions, as well as by the position, shape and scale of the artificial islands, the changes of hydrodynamic environment caused by both the west artificial island and the east one is similar in the change rules and different in the forms.
Analysis and Design on Spacial Finite Element of Non-Conventional Type Bridge by ANSYS
Authors: Chen Xu Yong , Zhong Shen , Gao Bing Yong
Published: October 2012

The paper takes a non-conventional bridge as the case, analyzes the shortcoming of Plane Bar Structure Analysis Software (PBSAS) in non-conventional structure, in order to study load-carrying features of non-conventional type bridge, it proposes a new non-conventional type bridge analysis approach integrating both spatial analysis software and graphic software. Such an approach is to make an overall analysis firstly by large-scale general-purpose finite element software ANSYS, then to compute and recheck various control sections by professional software DR.BRIDGE. Thus to evaluate non-conventional type bridge, and the approach aims to provide a certain reference for analysis on similar bridges.
Design and Analysis of Shear Connector in Prestressed Concrete Composite Box-Girder with Corrugated Steel Webs
Authors: Huang Shi Qi
Published: October 2012

In the PC composite box-girder with corrugated steel webs, the mechanical properties depend on the performance of shear connector. In this paper, the most commonly used forms of shear connector in PC composite box-girder with corrugated steel webs are introduced. Then method of design and calculation of shear connector is introduced. At last, the engineering design case of shear connector in the South-to-North Water Diversion Bridge is presented.
Study on Dynamic Characteristic of 64m Railway Steel Truss Bridge on the Different Speed of Train Loads
Authors: Sun Zhi Jie
Published: October 2012

Through theoretical calculation, systemic analysis of dynamic performance of the 64m single and double line railway steel truss bridges on the different speed of train loads. Contrast and analysis the main dynamic performance parameters of bridges on the differend speed. In 64m steel truss bridges in Heavy-Haul Coal Line application practice proves that the deflection of the bridge to the speed is insensitive. The vertical acceleration and horizontal acceleration is sensitive to speed. The speed 80km/h is the speed which lead to the maximum vertical acceleration of the single line and double line in light-load condition.
Finite Element Calculation and Pushing Construction Analysis on the Superstructure of Beijiang Auxiliary Channel Bridge
Authors: Wang Yu Lan , Zheng Guo Dong
Published: October 2012

Finite element analysis and calculation are held on the superstructure of the auxiliary channel bridge at the right branching of Beijiang Bridge for a short condition and the service phase. The theoretical launching force is calculated and amended in construction. The results show that when considering load effects such as the dead loads of box girders, the live loads of decks and the pre-stressed secondary forces, the eccentric stress state will appear on the webs, and the steel stress produced by shrinkage and creep of concrete can not be ignored. So the launching force must be amended during the construction process. These conclusions have a certain reference value on the bridge design and construction.
Numerical Analysis on the Dynamic Characteristics of South-to-North Water Division Bridge during the Cantilever Construction Stage
Authors: Zuo Jun Chao
Published: October 2012

The South-to-North Water Division Bridge is a prestressed concrete composite box-girder bridge with corrugated steel webs constructed by cast-in-place cantilever method. Its modal shape and modal frequency were calculated during each cantilever construction stage. And the formula about the relation between length of cantilever and natural frequency was derived.
Installation Technology of Webs in the Construction of PC Box-Girder Bridge with Corrugated Steel Webs
Authors: Du Ya Jiang , Yang Bing Wen , Wan Shui
Published: October 2012

In the construction of prestressed concrete(PC) box-girder bridge with corrugated steel webs used cast-in-place cantilever method, the key component-corrugated steel webs are fabricated in factory first and then transported to the construction site. Because of the low out-of plane stiffness, corrugated steel webs are easy to deform in the construction, which brings many difficulties for construction. The precision of installing the corrugated steel web has a direct effect on the cross-section shape of the box-girder. So it is a key step to monitor the orientation and installation of corrugated steel web during construction. Based on the experience of some PC box-girder bridges with corrugated steel webs having been built, a method to control the installation accuracy of corrugated steel webs is proposed and some quality assurance measures are introduced in order to ensure the accuracy, reliability and security of the installation of corrugated steel web. The method can be taken as a reference in the construction of this kind of bridge.
Influence Analysis of Rigid Steel Framework on the Closure Section of the Bridge by Cantilever Construction Method
Authors: Zheng Fei , Li Guo Wen , Yan Lei , Liu Peng , Zhang Gang
Published: October 2012

Nowadays,issues regarding deflections at mid-span and cracks existing on the box girder of prestressed concrete continuous rigid-frame bridge have raised researchers’ attentions in China.To solve these issues, research is conducted on the influence of rigid steel framework at closure segment of the box girder in the process of the cantilever construction of the PC continuous rigid-frame bridge. Finite element analyses are carried out through ANSYS to investigate the distributions of internal forces and stresses in rigid steel framework inside and outside the closure segment of the bridge. Further, the normal stresses of closure segment under service load and overloading conditions are evaluated and compared. Results show that the stresses redistributed to the inner rigid steel framework decrease 16.7% after post-tensioning operation, causing insufficient compressive stresses at the bottom flange of box girder around closure segment, and inner rigid steel framework may produce cracks on the bridge which should be considered seriously in the design and construction.
Key Technologies of Construction and Control of Arch Cantilever Casting for Mupeng Bridge
Authors: Peng Wen Ping , Tian Zhong Chu , Jiang Tian Yong
Published: October 2012

The technology of cantilever casting construction was complex for reinforced concrete arch bridges. This paper described key technologies of construction and control of concrete arch cantilever casting construction. The article introduced on cast-in-place support, fastening tower, hanging basket and anchorage system in cantilever casting construction. Based on the results of arch ring stress and arch ring camber, the methods of construction control were established on arch ring alignment, arch ring stress, cable force and tower displacement during the arch construction. Ensure the structure safety and make the structure's internal force reasonable, the compressive stress of arch sections is less than 10MPa, tensile stress of arch sections is less than 1.5MPa in construction of concrete arch cantilever casting.
Research on Failure Probability of Load-Carrying Capacity for Existing Diseased Concrete Bridge
Authors: Liu Xiao Yan , Lei Xu , Xiao Sheng Cai , Wang Guang Hui
Published: October 2012

As a bridge assessment method, risk assessment is more and more applied to load-carrying capacity assessment of existing bridge. This method assesses the bridge through the failure risk value which calculated by the failure probability and failure loss value. The most important factor to the risk assessment of load-carrying capacity upon the existing and diseased bridge is the calculation of failure probability. This paper combines the reliability calculation theory with a certain site detective data of bridge that considering uncertainty of load and resistance along with the diseases of bridge, and induces in the correction coefficient of load and resistance respectively to calculate the failure probability and reliability index of bridge. Finally, these indexes are compared with those provided by the current code to implement risk assessment of load-carrying capacity of the bridge.
Study on the Role of Sediment Dike in the Port Construction near Silt Coast
Authors: Kong Jun , Cheng Chen , Shen Cheng Ji
Published: October 2012

With the rapid development of social economy, silt coast exploitation becomes the main approach to make up the imbalance of harbor resources in China, although the inherent problem of sedimentation has not been fully addressed. Due to the special geomorphology and complex sediment transport near silt coastal zone, the sediment dike, as a traditional construction, plays an important role in maintaining port operation and decreasing the siltation. In present paper, using the Guang-Ao harbor district planning project in the south coast of China, different dike arrangement schemes have been compared based on numerical simulations. The sediment transport characteristics and the latent erosion and siltation trend under these schemes have been discussed. Results show the importance and necessity of a proper design of dike near silt coastal zone, which can guide the sand transport path and reduce the possibility of sand intrusion in harbor zone. Present research provides a reference for other engineers to design and optimize the harbor design, especially in zones with high concentration of suspended sediment.
Study of Wave Models of Parabolic Mild Slope Equation and Boussinesq Equation
Authors: Fan Fei , Liang Bing Chen , Lv Xiu Li
Published: October 2012

The Parabolic mild slope equation and Boussinesq equation wave models are studied in this paper. First, the wave models Funwave and REF/DIF, which based on Boussinesq equations and the parabolic mild slope equation, respectively, are introduced. And then, two experiments are used to study these two wave models, one is the non-breaking shoal experiment of University of Delaware and the other is the breaking undertow test experiment, which was finished in Ocean University of China by author. Last, the simulation data of two wave models are compared with the measured data. The results show that both Boussinesq equation and the parabolic mild slope equation wave models can simulated nearshore wave condition precisely, but Boussinesq equation wave models has a disadvantage in catching the variation of wave height caused by wave breaking.
Numerical Simulation on Sudden Siltation Induced by Winner Storm and Large Waves in Outer Channel of Huanghua Port, China
Authors: Zhang Wei Sheng , Zhang Jin Shan , Chen Chen , Zhao Hong Jun
Published: October 2012

A multinest storm surge-wave-sediment model is applied to simulate strong storm surge caused by winter storm in Bohai Bay in Oct, 2003. The fields of current and sediment of for- and post- regulating structure are calculated to analysis the effect of regulation. The results show that the alongshore current caused by storm surge strengthen the cross-channel component and that provided the impetus conditions for sediment transport. The siltation in the outer channel of Huanghua port in the second stage is very severe. For example, the thickness of slitting sediment in the area, 3~19 kilometers (away from the entrance of port) is over 2.0 meters. While the third stage dike for debris barrier is completed, the hyper-concentrated silt-laden flow offshore could be eluded, and the maximum deposition area goes out thus the sediment siltation is reduced.
The Research on Causes of the Landslide from Typhoon in the Coastal Area of Wenzhou and its Protection Measures
Authors: Sun Bi Hong
Published: October 2012

Due to its special coastal soil condition and climatic and hydrological conditions, Wenzhou is prone to have landslides and other geologic hazards. According to the investigation about the soil and climate condition in Wenzhou and combining with the result of the survey, we analyzed the slope stability and concluded the main reason for how typhoon causes landslide in the coastal area of Wenzhou. Ultimately, we studied the suitable measures in dealing with slope protection and made a conclusion.
Essential Type of Bank Collapses in the Middle-Lower Yangtze River and Corresponding Preventive Measures
Authors: Zhang Xing Nong , Chen Chang Ying , Jia Dong Dong
Published: October 2012

Four types of bank collapses in the middle-lower Yangtze River, that is erosion type, crash type, slippage type and flow-slide type, are pointed out, and characteristics and formation conditions of each one are analyzed. In order to provide a reference for decision-making of calamity reduction and improvement project, some preventive measures on them, including monitoring of river hydrology, morphology near bank, and hydrologicalgeology, and inspection and investigation of outward indication of bank and human activity, are presented by means of analysis on above-mentioned aspects.
Buildings Setbacks Research From Surface-Fault-Rupture Statistical Analysis
Authors: Zhang Jian Yi , Bo Jing Shan , Xu Guo Dong , Huang Jing Yi
Published: October 2012

With the author and others scientific investigation on China Wenchuan Ms8.0 earthquake, China Yushu Ms7.1 earthquake and "China's active fault surveying and earthquake hazard evaluation project" relevant data results and the world requirements about project setback of active faults, etc., this paper concluded that: (1) width of Surface-Fault-Rupture is about 40m by statistics, or from the main surface rupture trace about 20m; (2) width of Surface-Fault-Rupture S and the fault vertical offset V, statistical diagrams and formulas S=8.72+9.01V; (3) Setback of the main surface trace D and buildings from damage index I, statistical diagrams and formulas I=0.7969-0.00231D; (4) based on the first three results and by the actual statistics of accuracy, we get three active fault location accuracy level of the standard i, ii, iii, respectively, the error is ± 5m, ± 25m, ± 60m, also, can give this level of standards of Surface-Fault-Rupture width to the actual engineering applications.
Probability Analysis of Longitudinal Horizontal Nonlinear Stochastic Seismic Response of Reinforced Concrete Bridge
Authors: Chen Wei Chao , Yang Wei Jun , Sun Chang Geng
Published: October 2012

Probability analysis of longitudinal horizontal nonlinear stochastic seismic response of reinforced concrete simply-supported beam bridge and continuous beam bridge are presented in this paper. Based on the degradative tri-linear resilience model, nonlinear equations of the structure are replaced by equivalent linear equations. The stochastic equivalent linear method and the decreasing order method of normal are adopted to calculate equivalent linear parameters, and then the stochastic seismic response of the structure can be analyzed by the linear of freedom system. Based on theoretical analysis and research, the analysis method of nonlinear stochastic seismic response of reinforced concrete bridge is put forward.