bluuebunny/crossref_metadata_2025 huggingface dataset:
Embankment Settlement Calculation Based on the Unsaturated Soils Theory
Authors: Hu Hai Ying , Zhang Yu Cheng
Published: September 2013

Based on the one-dimensional constitutive relationship of unsaturated soils, this thesis has established the calculation model for embankment settlement with lateral deformation and without lateral deformation in accordance with the mechanic characteristics and in consideration of the influence of water environment. In addition, the thesis has provided the calculation methods for embankment settlement under various working situations (like under the situations of external load function, self-weight effect, increasing of the groundwater level, the invasion effect of rain water and the comprehensive effect of various working conditions) and used the settlement deformation results from the experiments of embankment models to check the calculation method. The method put forward in this thesis could not only be used in the calculation of the settlement deformation under load, but also could be used for the calculation of the deformation caused by the changes of water content in the embankment.
Energy Decay of Global Solutions for a System of Petrovsky Equations
Authors: Ye Yao Jun
Published: September 2013

The initial-boundary value problem for a class of nonlinear Petrovsky systems in bounded domain is studied. We prove the energy decay estimate of global solutions through the use of a difference inequality.
Numerical Analysis of the Influence of Bolt Pretension on Rigid Flange Joint Rigidity in Substation Steel Structures
Authors: Wang Yan , Cheng Zu Tian , Peng Yi Liang , Gu Xin , Zhang Tao
Published: September 2013

in order to research the influence of bolt pretension on the rigid flange joints stiffness further, ANSYS finite element model was built on the basis of experimental investigations, and was used to research the influence of bolt pretension on the axial rigidity, shear rigidity and bending rigidity. The calculation results indicated that the axial rigidity, shear rigidity and bending rigidity were all increased along with the increase of bolt pretension, and the increase of axial rigidity was most obvious.
The Analysis of Vibration for Ballastless Track-Bridge Base on a Hybrid FE-SEA Method
Authors: Luo Wen Jun , Lei Xiao Yan , Lian Song Liang
Published: September 2013

In this study, the methods for combining statistical energy analysis (SEA) and the finite element method (FEM) for the vibration analysis of structures are studied. Using the two methods simultaneously isnt entirely extend a primarily low frequency method, the finite element method, and high frequency method, SEA, to the mid frequency region are addressed. This approach is intended to extend the frequency range for a FEM based vibration analysis . A new finite element elementl for elevated slab ballastless track is proposed in which the new model can be used for modeling the track structural constituents of elevated slab ballastless track. Using finite element method and Hamilton theory, the coupled equation of vehicle-track-bridge can be established. In calculating example, both the rail displacement induced by single four-layer beam model. Specifically, it showed that the method yields very good result and high performance in the numerical example of previous research.
Three-Dimensional FEM Simulation of the Ship-Bridge Collision
Authors: Su Wei , Sun Ying , Huang Shi Qing , Liu Ren Huai
Published: September 2013

In this paper, the structural safety of the Niuwan Bridge subjected to vessel collision is investigated by the large-scale commercial finite element software ANSYS. A whole FEM model is built and a reasonable analysis and illustration for taking the value of vessel-collision forces is presented. Additionally, under the premise of reasonable simulation of the boundary conditions, the effects of the support abutments, the prestress and the carloads are considered. The analysis results have certain reference values for the anti-collision and reinforcement of bridges.
Effect of Novel Grinding Wheels on Grinding Performance
Authors: Tsai Ming Yi , Jian Shi Xing , Chiang J. H.
Published: September 2013

Grinding, a technique for removing abrasive materials, is a chip-removal process that uses an individual abrasive grain as the cutting tool. Abrasive material removal processes can be very challenging owing to the high power requirements and the resulting high temperatures, especially at the workpiece-wheel interface. This paper presents a novel system that uses graphite particles impregnated in an aluminum oxide matrix to form a grinding wheel. This study specifically investigated grinding wheels with a graphite content of 0.5 wt%. The new grinding wheel was compared with conventional grinding wheels by comparing the factors of grinding performance, such as surface roughness, morphology, wheel wear ratio, grinding temperature, and grinding forces, when the wheels were used under two different coolant strategiesdry and with minimum quantity lubrication (MQL) using pure water. This study found that there is a considerable improvement in the grinding performance using graphite-impregnated grinding wheels over the performance obtained using conventional grinding wheels. The use of 0.5 wt% graphite provided better surface roughness and topography, lower grinding temperature, and decreased force; in addition, wheel consumption was lower, resulting in extended wheel life.
Failure Behavior for Cross-Anisotropic Sand
Authors: Li Xue Feng , Kong Liang
Published: September 2013

In order to describe the failure behavior of anisotropy sand, a failure criterion with the method of macro-micro incorporation is employ. A fabric tensor employed in the method describes the material microstructure and a novel anisotropy state variable is properly defined in the term of the two joint invariant of loading direction tensor and fabric tensor, then a failure criterion of anisotropic soil is proposed with the novel anisotropy state. The failure criterion is compared with experimental results from the literature to show that it is able to capture the conditions obtained in three-dimensional experiments without and with stress rotations. The limitations of the criterion are demonstrated by its failure to capture the behavior of some sand with particular micro-structures.
The Effect of Different Groupings of Building Elements on Cost Significant Elements and their Cost Contributions to the Total Building Cost of a Block of Medium Cost Apartments in Malaysia
Authors: Lim Cheng Sim , Toh Tien Choon , Lee Wah Peng , Ng See Seng , Yong Chin Khian , Goh Kai Chen
Published: September 2013

Utilising cost data from a block of medium cost apartments in Sungai Buloh, Malaysia, this pilot study aims to evaluate the cost significant elements (CSE) and their cost contributions (in percentages) to the total building cost (TBC) determined based on the grouping of building elements according to the original bills of quantities (BQ) format and the grouping of building elements according to The Institution of Surveyors, Malaysia (ISM)’s elemental cost analysis (ECA) format. Two separate tabulations following the same steps are made in order to achieve the objective of the study. Each tabulation has information on the total cost of each element, and produces information on ‘Actual Total Bill Value’, ‘Mean Bill Value’, ‘Total Bill Value of CSE’, ‘Number of Total Elements (TE)’, ‘Number of CSE in Total’, ‘CSE/TE (per cent)’, and lastly ‘Total Bill Value of CSE/Actual Total Bill Value’. For both tabulations, it is found that “45.45% to 50.00%” of the total number of building elements has contributed to “78.11% to 83.77%” of the TBC and that the two different groupings of building elements being studied have yielded quite similar results. Nonetheless, further analysis can be done with more data from other similar buildings in the region to obtain statistically reliable results.
Chooseing Suitable BIM Software for Engineering Projects Based on the Fuzzy Neural Network Evaluation Model
Authors: Feng Jian , Zhang Jian Ping , Gao Shun Ping
Published: September 2013

With BIM technology development in the Chinese market, there are many different BIM software invented. How according to the engineering characteristics and needs to select the appropriate software in numerous BIM products, will be save a lot of manpower and resources. These paper will based on literature research and case analysis, find out the appropriate project between BIM software and Engineering; Making up the adaptable index system by statistical analysis; Finally set up the fuzzy neural network evaluation model. Effectively to provide decision support information by this model for choosing suitable for BIM software.
Types and Stages of the Construction Management
Authors: Xie Hai , Zhang Zhi Jun
Published: September 2013

Construction management or construction project management (CPM) is the overall planning, coordination, and control of a project from beginning to completion. CPM is aimed at meeting a clients requirement in order to produce a functionally and financially viable project. CPM is project management that applies to the construction sector. The construction industry is composed of five sectors: residential, commercial, civil, industrial, and environmental. A construction manager holds the same responsibilities and completes the same processes in each sector. All that separates a construction manager in one sector from one in another is the knowledge of the construction site. This may include different types of equipment, materials, subcontractors, and possibly locations. A contractor is assigned to a construction project once the design has been completed by the architect or is still in progress. This is done by going through a bidding process with different contractors. The contractor is selected by using one of the three selection methods: low-bid selection, best-value selection, or qualifications-based selection. A construction manager should have the ability to handle public safety, time management, decision making, mathematics, and human resources.
The Potential of Augmented Reality Technology for Pre-Construction
Authors: Khalid Che Mohd Lukman , Mohamed Zainai , Fathi Mohamad Syazli , Zakiyudin Mohd Zulakhmar , Rawai Norshakila , Abedi Mohammad
Published: September 2013

Construction project management covering various aspects such as planning, coordinating, directing, scheduling, monitoring and control. Pre-construction services are used in planning a construction project before the actual construction begins. However, various problems happened at the pre-construction planning stage. This paper present an overview of the major problems in pre-construction stage and look at the potential of using augmented reality technology to overcome those problems. It was found that, at the pre-construction stage, good planning can not be done by the project teams especially to engineers and contractors due to the lack of supporting data, particularly when it involves information relating to underground utilities such as telecommunications, gas, electricity, water and sewerage. There are several approaches that can been undertaken in pre-construction services, especially in making an informed decision. The potential technology is using Augmented Reality (AR)-based approach in pre-construction service. Augmented reality is the integration of digital information with the users environment in real-time. It was one of the tool that support the concept of cyber-physical systems (CPS). CPS is the integration systems between computational network and physical processes. Currently, there are many fields utilised the application of AR such as medical, militiry, vehicles, gaming and navigation. This paper presents the applications of an AR-based approach to medical and gaming industry and explore the potential of using AR in pre-construction. The finding shows that the AR is a potential decision support tool that will speed up the planning process of the project team in the pre-construction phase in real-time.
The Engineering Insurance Mode Selection under the EPC Contract Conditions
Authors: Chen Wei Ke , Wang Chun
Published: September 2013

The general contractors and owners face more risk in the EPC contract. But the people are usually used in international projects, and it has been applied in Chinese, the use of engineering insurance risk transfer, so choose the right insurance coverage critical to the promotion of the EPC contract. This paper by engineering insurance insuring the two modes: We analysis with the owners insured mode and contractors insured mode, that the contractor insured model is more suitable for the EPC contract, control more effective risk, and eventually reach the owners and contractors a common profits.
Construction Project Bid Evaluation of Group Decision-Making Model Based on Triangular Fuzzy Number
Authors: Zhang Ming Xuan , Zhang Dong Lei
Published: September 2013

A new comprehensive evaluation based on triangular fuzzy number method is put forward in this paper, according to the principle of fuzzy comprehensive evaluation and using trichotomy to determine membership function. And a calculation example is illustrated by using the method presented. The method is a reference to the bid evaluation in the future.
Research on Design Management of Large-Scale Tobacco Construction Project
Authors: Shan Mei Di
Published: September 2013

Through the research of design management on the implementation of Hangzhou Cigarette Factory the 11th five-year reconstruction technical reform project,proposes the method of designing stage management and coordination management, for the same type of tobacco construction project reference.
Study on the Shear Strength Properties of the Silt in Hangzhou, China
Authors: Zhang Zhen Ying , Wu Da Zhi , Wang Cha
Published: September 2013

To investigate the shear strength properties of the silt, three soil samples are collected from Xiasha zone, Hangzhou, Zhejiang Province, China. The geotechnical engineering parameters of the silt soil are measured in the soil mechanics laboratory. Tests results show that the uniformity coefficient of the silt is 13.6, the natural density is 1.96t/m3, the moisture content is 17.0%, the plasticity index is 9.4, the cohesion force varies from 20.8 to 28.3kPa, and the internal friction angle varies from 12.3 to 31.8degree. Finally, the properties of the shear strength are studied, and find that the relationship between the shear stress and the shear strain is conformity with the strain hardening curve, and the relationship between the shear strength and the vertical pressure applied on the soil samples is linear, and agrees with the Coulombs law.
Study on Improvement of the Safety Management in the Construction Industry
Authors: Liang Dong Ling , Shi Zhen Wu , Li Chong , Zhou Jia
Published: September 2013

The construction industry is a pillar industry of Chinese national economy, but also one of the industries with high accident rates. This paper analyzed Chinese construction industry in recent years, production safety situation, which indicated that the building production safety accidents and deaths continued to decline, construction safety production and the overall situation was getting better and better. After management analysis of safety production in construction industry, strengthening the government functions, truly serving people oriented from government to business, and enhancing the safety culture were real solutions of construction management.
The Improved Shear Strength Calculation Method in Direct Shear Test
Authors: Dong Yun , Wang Yong Cun , Lu Li Guo , Wang Wei
Published: September 2013

Direct shear test is broadly used to get the strength of soil, joints, and specific material in the field of geotechnical engineering because its simple structure and easier operation. But the current direct shear strength calculation does not concern on the variation of the shearing surface during the test, has no regard for the effects of the shearing area on the shear strength, so the test result is not the really strength of the samples. To discovery the affection of the shearing surface on the direct shear strength, three different calculation methods of shear surface and its affection on the shear strength were put forward based on the new mathematical model and large number of experimental with improvement direct shear apparatus, the new calculation method makes the result more accuracy and closer to the really shear strength of the samples.
Research and Application of New Tower Foundation Type above Goaf of Coal Mine
Authors: Zhang Yuan Liang , Zhang Yi Hu
Published: September 2013

Iron tower foundations of transmission line located above goaf of coal mine generally use integral flexible concrete foundation or raft foundation to reduce uneven foundation settlement.When the tower is located at steep slope or restricted area, the above two basic foundation types require wide range of lower base surface, which causes widespread environmental damage.Consideratiing engineering practice, a new foundation type is proposed supplemented by theoretical analysis and economic analysis in this paper, which provides a new choice for foundation design in mountains areas above goaf of coal mine.
Hydro-Mechanical Coupled Analysis of the Stability of Surrounding Rock Mass of Underground Water-Sealed Oil Storage
Authors: Zhang Yun Jie , Xu Tao , Xu Qiang , Bu Lin
Published: September 2013

Based on the fluid-solid coupling theory, we study the stability of surrounding rock mass around underground oil storage in Huangdao, Shandong province, analyze the stress of the surrounding rock mass around three chambers and the displacement change of several key monitoring points after excavation and evaluate the stability of surrounding rock mass using COMSOL Multiphysics software. Research results show that the stress at both sides of the straight wall of cavern increases, especially obvious stress concentration forms at the corners of the cavern, and the surrounding rock mass moves towards the cavern after excavation. The stress and displacement of the surrounding rock mass will increase accordingly after setting the water curtains, but the change does not have a substantive impact on the stability of surrounding rock mass.
Analysis on the Effects of Goodman Contact Model's Parameters to the Shear Stress
Authors: Xue Jian Rong , Dai Ling Hui , Zhang Ying Ying
Published: September 2013

In this paper, the Goodman element contact model is programmed on the second-development calculation platform offered by finite element software. Computation and analysis have been done so as to obtain the effect of contact parameters to the shear stress. The results show that, the subroutine can reflect the model’s nonlinear characteristic well. The order of the effects of parameters to shear stress is: φ>Rf >K>n; and when Rf increases, the shear stress decreases. These results can offer reference to direct shear tests to obtain the contact parameters.
Application of New Transmission Line Tower Foundation on Steep Slope in Mountains Areas
Authors: Zhang Yuan Liang , Ge Ya Ping
Published: September 2013

For difference of elevation of mountain slope, four legs of iron tower are not in the same plane.In order to reduce the excavation of the base surface and damage to the environment, several foundation types are widely used to adapt with the terrain changes,such as comprehensive unequal legs,unequal Foundation, outfitting extra legs and so on.When the tower is located in steep slope of rocky area,common foundation types in use will bring a large area of ​​earth and rock excavation, construction difficulties, high-risk, poor basic indicators, greater damage to the environment.Consideratiing engineering practice, a new foundation type is proposed in this paper supplemented by theoretical analysis and economic analysis, which takes full advantage of the terrain and rock properties and provides a new choice for foundation design on steep slope in mountains areas.
Cause Analysis and Improvement Measures of Sloping Roof Leakage
Authors: Jin Kai Chao , Chen Li Juan , Zhao Lan Ying
Published: September 2013

the project is the 12 layer framework of cast-in-place reinforced concrete building roof, the C30 reinforced concrete sloping roof, slope, slope length of a bidirectional level in two forms, a gradient of about 35 °, sloping roof horizontal projection area of about 7200m2, with exhaust gas wells, gutter, roof structure is relatively complex.
Study on Stresses Distribution in Narrow Backfilled Stopes and the Effects of Parameters Based on Elastic-Plastic Model
Authors: Zhang Hong Yan , Yu Qing Yang , Wang Qing Song
Published: September 2013

Arching effect exists in narrow backfilled stopes. In this paper, numerical software-FLAC was used to research the vertical stresses distribution in vertical backfilled stopes, and to study the effects of parameters on stresses distribution. Backfilled stopes can be designed reasonably by the modified parameters.
Soil Liquefaction Evaluation of Offshore Site Based on In Situ Shear Wave Velocity Measurements
Authors: Di Sheng Jie , Wang Ming Yuan , Shan Zhi Gang , Jia Hai Bo
Published: September 2013

A procedure for evaluating liquefaction resistance of soils based on the shear wave velocity measurements is outlined in the paper. The procedure follows the general formal of the Seed-Idriss simplified procedure. In addition, it was developed following suggestions from industry, researchers, and practitioners. The procedure correctly predicts moderate to high liquefaction potential for over 95% of the liquefaction case histories. The case study for the site of offshore wind farm in Jiangsu province is provided to illustrate the application of the proposed procedure. The feature of the soils and the shear wave velocity in-situ tested in site are discussed and the liquefaction potential of the layer is evaluated. The application shows that the layers of the non-cohesive soils in the depths 3-11m may be liquefiable according to the procedure.
Elasto-Plastic Constitutive Model Considering the Influences of Soil Structure and Anisotropy
Authors: Cui Guang Qin , Liu Zeng Rong , Ma Chen Guang
Published: September 2013

Structure and anisotropy are two fundamental aspects of natural clays. They cant be ignored because of their significant influences on soils strength and stress-strain behavior, etc. Therefore, anisotropic tensor and structural parameters are introduced in Modified Cam Clay Model which is only suitable for isotropic remolded clays, and evolution laws of them are given in this paper. Thus, an elasto-plastic constitutive model considering the influences of natural soil structure and anisotropy is established. Most parameters involved in this model have explicit physical meaning and are easily determined through geotechnical tests, which makes this model more flexible, practical and applicable to practical engineering.
Long-Term Performance Study of High Moisture Content Cohesive Soil Subgrade in Seasonal Frozen Region
Authors: Liu Sheng Chuan , Ding Gui Ling , Chen Gang
Published: September 2013

This project is aiming at the high water content clay in seasonally frozen ground region, based on the expressway program in Heilongjiang province. By applying laboratory test, field test, field monitoring and theoretical analysis, research has been proposed to understand the deformation law and long-term performance of high water content clay subgrade in freeze-thaw condition. From the comparison test of soil and soil treated with lime, road properties of high water content clay has been found out. It is a very necessary and effective method using lime to treat the high water content clay in subgrade construction. Laboratory freeze-thaw experiments uncover the strength weakening law of soil treated with lime. With theoretical analysis and numerical calculation, the interaction between clayey subgrade and pavement structure layer under effect of vehicle dynamic load is analyzed. According to this result, control standards of subgrade frost heave in seasonally frozen ground region and subgrade resilience modulus in spring have been proposed.
Hydraulic Performance Optimization on Inlet-Outlet of Pumped Storage Plant
Authors: Gao Ya Nan , Yi Jun Nan , Zhao Rui Cun , Chen Li Fen , Wu Xu Min
Published: September 2013

This paper, using 3-D numerical simulation and the hydraulic model tests, presents an analysis on hydraulic performance of pumped storage plant inlet/outlet. It discusses the uneven flow coefficient, coefficient of orifice flow distribution and head loss coefficient of inlet/outlet in different sizes. The optimized size has a uniform flow distribution, with less to produce unwanted eddies.
Experimental Study on Backwater in Cavity of Aerator on Chute with Mild Slope
Authors: Qiao Liang , Xu Yi Min , Rong Yan , Ma Guan Bo , Shen Chun Ying
Published: September 2013

Aerator is often used in the spillways or tunnels to protect these discharge release works from cavitation damage. But for the flow chutes with mild bottom slope, the backwater may occur easily in the aerators cavity. There are a lot of factors to influence the backwater in the cavity. Based on the model experiments and analysis, the backwater in the bottom aerators cavity on the chutes with mild bottom slope and some influence factor to the backwater are investigated. The research presented in this paper provides some laws of how backwater exists in the aerators cavity and how to reduce backwater in the cavity. Results show, in the case of other conditions remain unchanged, flow discharge is inversely proportion to the depth of backwater, and the takeoff angle of aerator affects the depth of backwater larger than the slope of chute; the greater the flow discharge is, the lower the depth of backwater. And the depth of backwater increases with aerator height. More attention should be paid to the backwater in the cavity for the chute with small bottom slope.
A Mechanism for Loess Self-Load Collapsibility-Saturated Loess Liquefaction Caused by Earth Microtremors
Authors: Wang Jia Ding , Gu Tian Feng
Published: September 2013

This paper presents a new mechanism for loess self-load Collapsibility-saturated loess liquefaction caused by earth microtremors .The principle of earth microtremors is briefly introduced and the processes of saturated loess liquefaction induced by earth microtremors are analyzed from a dynamic view. A field test of loess in water immersion was done over a 420 hour period on Gaolanshan Mountain at Lanzhou,China. After stopping water flooding, earth microtremors at the bottom of test impounding pits were continuously measured by seismic equipment.We conclude that there is a relationship between loess collapsing values and the amplitude and predominant period of the earth microtremors.The results of our study show that the higher the amplitude and the longer the predominant period of earth microtremors, the more intensive will be the liquefaction grade.Finally,then most probable series of affecting factors to liquefaction,such as C. values of loess,amplitude, frequency, duration,wave type and propagation direction are all favorable to loess liquefaction.
Study on Phreatic Line of Reservoir Slope under the Rainfall and Reservoir Level Fluctuation
Authors: Wu Yi Ping , Ou Guang Zhao , Liao Jian Min , Meng Zhen
Published: September 2013

The determination of the phreatic line under the action of rainfall and reservoir water level fluctuation together is of great importance for reservoir slope stability analysis. However, there are no unified Formulas for the calculation of phreatic line. Homogeneous reservoir slope seepage model with inclined impermeable bed is built. Then, a conceptual model is set up based on the basic principle of seepage theory, and the approximate analytic solutions of phreatic line are derived with the Boussinesq Differential Equation of unsteady infiltration and initial value calculated in steady flow condition. And the simplified Formula, which is convenient for engineering application, is obtained by Polynomial Fitting Method.
A Simplified Formula for Calculating the Elastic Distortional Bucking Stress of Steel Channel Bending Members with Complex Edge Stiffeners and Intermediate Stiffeners in Elements
Authors: Wang Chun Gang , Zhao Da Qian , Yu Xin Yong
Published: September 2013

In order to research the simplified formulas of bending steel channels with complex edge stiffeners for their elastic distortional buckling stress, each 70 members for lipped channels with complex edge stiffeners, Σ style channels with complex edge stiffeners and channels with complex edge stiffeners and intermediate V type stiffeners in the web were numerical analyzed by the finite strip software CUFSM. Based on the existed expression for local bucking and introducing distortional buckling coefficient, each of the suggested simplified formulas for distortional buckling stress of the above members were summarized. Besides, formulas for lipped channels with complex edge stiffeners and channels with complex edge stiffeners and intermediate V type stiffeners in the web were united as one. All the formulas were confirmed for their availability.
Seismic Behavior of Concrete Columns Confined by CFRP and GFRP Jackets
Authors: Teng Yu Mei , Tian Ye , Liu James
Published: September 2013

This paper presents experimental results of a series of large-scale reinforced concrete circular and square columns tested under lateral cyclic displacement excursions while simultaneously subjected to constant axial load. All the specimens contained only minimal transverse steel and were then retrofitted with CFRP or GFRP jackets except control specimens. The measured hysteretic loops of the moment vs. curvature and shear vs. deflection relationships are reported for each specimen. It was observed that both CFRP and GFRP wrapping could provide effective confinement and significantly improve the seismic performance of columns. The effectiveness of FRP in enhancing column ductility relates more closely to its tensile strength than stiffness, thus the application of GFRP confinement to concrete columns is promoted due to obtainability and economical concern.
Experimental Study on Seismic Behavior of CFRP-Strengthened RC Beam-Colum Joints
Authors: He Shan , He Xue Jun , Guo Qing , Wu Xu Kang
Published: September 2013

Based on the experiment research of three concrete beam-column joints strengthened with anchored Carbon Fiber Reinforced Polymer (CFRP) under low reversed cyclic loading , this paper studys on the mechanical properties and deformation characteristics of reinforced nodes, and also makes the anylasis of the influence mechanism of shear bearing capacity of beam-column joints with longitudinal land transverse carbon fiber reinforcement amount in the beam-colunm ends. The results show that: the bolt-plate lock-anchored CFRP hoops can effectively delay the debonding of the longitudinal CFRP at the end of beam, significantly increase the energy dissipation capacity of the joint.
The Measurement of Temperature Stress Caused by Sunshine Action of Steel Truss
Authors: Liu Wei
Published: September 2013

According to the fact that the research about temperature stress of steel structure is few. In this paper, a factory steel truss which support raw material pipeline as an example, taking the 34-hour on-site continuous strain test on the steel truss caused by sunshine temperature. The experimental results show that the temperature stress has a great influence on the internal force of steel truss. And the results can provide a basis for engineering design.
Seismic Response Analysis of Dendritic Column in the Folded Plate Grid Frame
Authors: Shuai Yan , Li Tie Ying
Published: September 2013

Firstly, we described the basic situation of dendritic structure. Then studied the elastoplastic time-procedure analysis of the dendriform-column, and researched in dynamic performance of structure under seldom occurred earthquake. Finally, we presented the performance difference comparison in the hinged support and fixed support conditions, and the corresponding analysis for folded plate grid frame structure. All these experiences will promote the application of dendriform-column in folded plate grid frame structure on the design and research work.
Exact Solutions of Dynamic Characteristics for Curved Beams with Pinned-Pinned Ends
Authors: Li Xiao Fei , Yan Wei Ming , He Hao Xiang
Published: September 2013

Based on the theory of virtual work and principle of thermal elasticity, exact solutions for in-plane displacements of curved beams with pinned-pinned ends are derived explicitly. In the case of infinite limit of radius, these equations coincide with that of the straight beams. Compared with the results of FEM, the analytical solutions by the proposed formulae are accurate. Basing on the stiffness matrix of statically indeterminate curved beams at three freedom direction, the dynamic characteristics are derived explicitly. The analytic method of dynamic characteristics for curved beam performed in this paper would provide a scientific base for further study and design of the curved bridges.
Numerical Simulation of Water-Air Two-Phase Flow in Stilling Basin during the Opening Processes of Radial Gates
Authors: Qiu Chun , Yue Shu Bo
Published: September 2013

3-D numerical simulation is carried out for the water flow when the three overflow radial gates use different opening velocities. The space-time change law of hydraulic characteristics is obtained. The water surface profile in the stilling basin fluctuates greatly during the processes; the maximum pressure on the slab of stilling basin increases and moves to downstream with the gates opening; the velocity near the slab of stilling basin corresponding to the left orifice is much larger than that corresponding to the right one. The calculated water surface profile is in good agreement with the results obtained in experiments. The results can provide important basis for operation mode of radial gate.
The Flat Truss Dynamic Characteristics and Seismic Response Analysis
Authors: Li Lu , Li Tie Ying
Published: September 2013

Flat truss is a new form of truss and are widely used in large-span space structure, Suzhou Railway Station roof of the main use of space for large-span steel diamond plate truss structure, the local two-way cross-diamond-shaped truss.Sap2000 v14 large general-purpose finite element analysis software, the modal analysis of the structure, and the modal response spectrum method the structure of X, Y, Z three earthquake, so as to arrive seismic coefficient of internal force distribution law, obtained the natural frequency of the structure, the vibration characteristics of the structure, so that the corresponding structural measures its weak parts of the structure, provides a sufficient basis for the safe use of the design and construction of the structure.
The Classification and Application of Interior Wall-Board in Steel Structure Building
Authors: Zhang Hai Xia , Yang Ping
Published: September 2013

Protection wall system is the key to promote the development of steel structure building to standardization and industrialization. On the market,there are many different kinds of wall materials, but some do not apply to steel structure buildings. In this part, it is discussed the adaptability of wall-board in steel structure, and introduce several common interior wall-board of the classification and application in practical engineering.
Analysis on Ultimate Bearing Capacity of the UHV Transmission Tower with Large Width Angle Steel
Authors: Xiao Qi , Tong Dan Dan , Song Ling Feng
Published: September 2013

The dissertation taked the ZBS2 straight-line tower in the UHV line project as the object,used the finite element software ANSYS to establish finite element model and did a analysis about its dynamic characteristics. Considering width and thickness of large width angle steel,the section area of large width angle steel is larger than normal angle steel,and the application of large width angle steel can increase bearing capacity of the member.Therefore,this article taked large width angle steel to replace double combined angle steels in the main members of the tower,and calculated the ultimate bearing capacity. Analysis of comparison indicate that the ultimate bearing capacity increases by 13% when large width angle steel is used.Therefore it is feasible and advantageous that large width angle steel uses in the UHV transimission tower,and it provide a reference and basis for future design of the UHV transmission tower with large width angle steel.
Analysis on the Impact of the Status of the Fresh-Old Concrete Bonding Interface on Dam Safety
Authors: Huang Tao , Zhang Guo Xin , Yang Bo , Zhang Lei
Published: September 2013

The bonding problem of interface between the fresh and old concrete is one of the main technological difficulties in the Heightening Project of Danjiangkou Dam in the South-to-North Water Diversion Project. At present, no mature experiences or engineering examples are found in China for concrete dam heightening. Because of the external environmental impacts of temperature change, aging and hydraulic fracturing on the interface between the fresh and old concrete, crack is likely to occur, which brings risks to the safe operation of the dam. In this article, the finite element direct force method was used to calculate the internal force. The safety of No. 1 dam monolith was calculated in accordance with the standard method for gravity dam in three conditions of fresh-old concrete bonding interface, i.e., perfect condition, cracked interface and cracked interface with water seepage. Suggestions for their solutions were also provided.
Concrete Creep and Shrinkage Effect Analysis Program Development
Authors: Li Fa Xiong , Guo Jia , Huang Hou Qing , Liu Qian
Published: September 2013

In order to analysis of concrete based on ABAQUS, A creep and shrinkage of concrete analysis program TDPA was developed. Firstly, the theory of creep and shrinkage effect of concrete was introduced. with the help of a Dirichlet series properties, creep stepwise recursive method was introduced to avoid stress history of large capacity storage; Secondly, using three user subroutine interface USDFLD, GETVRM, UEXPAN provided by ABAQUS, analysis program TDPA was developed by Fortran program language; Finally, typical long-term load tests of pre-stressed concrete and steel concrete composite members long term tests were selected to prove the reliability of TDPA. Research results show that: the TDAP has high applicability and reliability. It is suitable for a variety of creep and shrinkage prediction model, and provides an effective method for creep and shrinkage of concrete analysis on ABAQUS platform.
Finite Element Analysis on Mechanical Behavior of Laminated Slab
Authors: Li Ming , Sun Zhe Zhe , Zhao Wei Jian
Published: September 2013

With the development of the computer, the finite element software has been more and more widely used in civil engineering. Finite element software ABAQUS has a good effect on simulating the mechanical performance of concrete. In this paper, using the finite element software ABAQUS, the finite element simulation on mechanical properties of laminated slab with shear connector under uniform load has been carried on, based on which, the load-deflection curve of laminated slab with shear connector and shearing stress distribution of the shear connector were obtained. The loading progress of laminated slab with shear connector and failure mechanism of the shear connector were analyzed. According to the simulation results, the main problems to be solved in the future were put forwarded.
Design of the Shear Reinforcement of RC Beams with Opening
Authors: Yang Shun Bin , Kuang Hao Wei , Pan Wen
Published: September 2013

This paper analyzes the mechanical behaviors and the principal of structural destroy when the openings are located in bending shear sections. Comparison of Some simplified design methods is also presented. A more rational simplified design method of the shear reinforcement in the RC beams with openings is advanced. Besides, the construction measures are suggested about upper and lower-chord around openings.
Experimental Study of Short Column with Welded H-Sharped Steel Reinforced Concrete under Axial Compresion
Authors: Yin Ying Zi , Zhang Yan , Zhao Gen Tian
Published: September 2013

Abstract：In order to study Force Performance of new column, the paper describes and presents the results of nine stub-column tests performed on partially encased composite columns made with welded H-section steel. The test studies effect of column about ultimate strength in s steel ratio, wide-thickness ratio of wing, Space of Horizontal bar. Through anglicizing, ultimate strength of short column under axial compression in different steel ratio; influenced factors of ultimate strength of short column and directly effected column about ultimate strength.
Research on Longitudinal Reinforcement Ratio of Reinforced Concrete Rectangular Section Single-Reinforced Beam
Authors: Liu Ping , Gu Zon Gang
Published: September 2013

Based on the cost of concrete and longitudinal reinforcement of reinforced concrete rectangular section single-reinforced Beam, the authors take as the variable the reinforcement ratio and the valid height of the rectangular section, and then derive the economical reinforcement ratio and planned height for the reinforced concrete rectangular section single-reinforced Beam. The research result has important practical meanings for reinforced concrete rectangular section single-reinforced beam.
Urban Annual Water Consumption Prediction Using Artificial Neural Network
Authors: Liang Bo
Published: September 2013

The paper established the BP neural network to predict the annual water consumption. The consumption of Tianjin urban annual water from 1991 to 2007 and its related factors including the urban population, per capita income levels, industrial output value, the city GDP, per capita daily water consumption, industrial water recycling rate are analyzed. The results show that the average deviations are 1.03%, 1.61%, and 1.26% for the hidden layer neuron number 10, 15 and 20 respectively for BP prediction. The R2 value reached to 0.9587, 0.8058, and 0.8851 for the hidden layer neuron number 10, 15 and 20 respectively for BP prediction. This confirms high efficiency for the hidden layer neuron number 10 in BP prediction.
Research on the Relationship between Three Industries' Structure and Transport Structure in China Based on Input-Output Table
Authors: Wang Rui Xia
Published: September 2013

The analysis framework of relationships between industrial and transport structure was constructed according to the Leontief input-output table. Analysis on the relationships between the three industries and transport industry was made, which was based on the input-output tables of 1992,1997,2002,2007. The analysis indicated that the demand of three industries to the transport in the future of national economy will be on the rise, with the development of industrialization and urbanization in our country, secondary industry and tertiary industry will have stronger demand for transport, railway transportation highway transportation and pipeline transportation have strong role in promoting the development of the national economy.
Study on the Ship Arrival Pattern of Container Terminals
Authors: Du Peng Cheng , Wang Wen Yuan , Tang Guo Lei , Guo Zi Jian
Published: September 2013

Container ship arrival pattern had an important effect on throughput capacity of container terminals. There is an urgent need for recognition of the ship arrival pattern of modern container terminal, owing to the change of the composition of both operating routes and arrival ships, which was brought up by the rapid development of Chinas coastal ports container service. This paper statistically analyzes the ship arrival data collected from some domestic container terminals from the view of the number of daily arrival vessels and the inter-arrival time between two ships by using Chi-Square Test. The results prove that the ship arrival pattern of container terminals vary with the constitute of container liner routes, and the number of daily arrival vessels follows either Poisson or normal distribution, and the inter-arrival time follows both negative-exponential and gamma distribution.
Research on Integration of Urban and Rural Bus Line Network Planning Model
Authors: Wu Jun , Wang Jing , Yang Kui
Published: September 2013

The advance of urbanization makes existing bus line network can not meet the travel needs of the increasing urban and rural residents, but reasonable integration of urban and rural bus line network planning is able to effectively solve this problem. In this paper, as a starting point to establish bi-level programming model of integration of urban and rural bus line network planning, the goal of upper model is minimum total investment in the construction of urban and rural public bus line network to the transport sector and the target of lower model is network resistance minimum. Then, based on the genetic algorithm to solve the model and put forward steps and flowchart. Established bi-level programming model by analyzing the studies can provide a theoretical reference for the planning of urban and rural bus line network.
Research on Urban Low-Carbon Transportation
Authors: Huang Ling , Zhou Han Qing
Published: September 2013

In order to achieve sustainable development of the economy, resources and environment, developing low-carbon economy is the only way, and urban low-carbon transportation is one of the key areas. The paper analyzes the important significance, characteristics and strategies of developing low-carbon transportation.
Advanced Processing of Biologically-Treated Papermaking Wastewater by Poly-Aluminum Chloride (PAC)
Authors: Zhu Yong Qiang , Feng Yu Ling , Zhang Hai Ying , Zhang Zhan Jun
Published: September 2013

In this study, biologically treated paper-making wastewater was treated using PAC to study removal efficiency of color as a function of pH and dosage of PAC. It was found that PAC was relatively effective in removing color from biologically papermaking wastewater. The optimal dosage, pH and stirring time were 40 mL L-1, 5 and 30 min, respectively. Effluent color after coagulation at the optimal conditions was 40 PCU, meeting requirements of Industrial Wastewater Discharge Standard of Pulping and Papermaking (GB3544-2008) . Therefore, PAC dosage of 40 mL L-1 and pH of 5 were recommended for treatment of biologically treated papermaking wastewater.
Service Requirements Distribution Algorithms in Carpooling Problem
Authors: Dong Shu Xia , Shao Zeng Zhen
Published: September 2013

The traffic congestion problem and logistics costs are becoming more and more serious. There is no doubt that carpooling may not only improve vehicle utilization rate but also reduce logistics costs. In multi-vehicle environment, how to distribute service requirements to a proper vehicle is to be solved firstly. In this paper, a heuristic clustering algorithm is introduced to solve grouping progress in deterministic carpooling problem. Based on characteristics of service requirements and vehicles, the conception matching degree and heuristic algorithm are proposed in order to distribute requirements into one specific vehicle. Simulation results show that the algorithm can improve the success ride rate greatly and reduce total vehicle costs.
Research of Vehicle Scheduling with Time Window Based on Genetic Algorithm
Authors: Zhou Xiao Rong , Song Meng Tian , Zhang Yu Ling
Published: September 2013

This paper based on the genetic algorithm,introduced part search process and respectively established the mathematical scheduling model of full loads vehicle optimal scheduling with soft time windows and of non-full loads on the basis of the long distance logistics transportation situation of some companys distribution center in Shenzhen. Then programmed to achieve the scheduling of multi-vehicle touting and selection, and conducted example analysis.