bluuebunny/crossref_metadata_2025 huggingface dataset:
Grey Correlation Analysis on the Sensitive Factors of Plastic Zone Extension of Surrounding Rock
Authors: Zheng Xuan Rong
Published: October 2013

As lack of explicit analysis method on the sequence of many factors influencing the plastic zone extension of surrounding rock, the grey correlation analysis method is adopted to study the relationship between the plastic zone extension radius Rp and the six factors such as cohesive c, internal friction angle φ, deformation modulus E, unit weight γ, initial ground stress σ and the radius of chamber r. By dealing with dimensionless, the corresponding sequences composed with the sensitive factors as sub-sequence and the plastic zone extension radius as mother sequence are obtained. The gray correlation analysis model of sensitive factors which evaluates the results with grey correlation degree is built by the methods of dimensionless and extreme difference variation. Then, an engineering example is analyzed with grey correlation. Based on the analysis results, the sorting of sensitive factors is φ > σ > c > r > E > γ. It implies that the influences of internal friction angle φ and initial ground stress σ are the most prominent, and the sensitivities of deformation modulus E and unit weight γ are lowest. These are in good agreement with the analytical formula of classical theory, and can be used in guiding the further optimization and improvement of the analytical expression of the plastic zone extension radius Rp of surrounding rock.
Stability Analysis of Dangerous Rock Masses
Authors: Dong Zhi Hong , Deng Yong Huang , Yi Wu
Published: October 2013

Dangerous rock masses in south of a city, once destroyed, it will be a threat to peoples lives and property in downstream. In this paper, distributions and morphological characteristics are analyzed on the basis of studying its geologic environment and precipitating factors of instability. And it quantitatively analyzes and valuates the stability of number 2 and 17 single dangerous rock by means of planar slide method and analysis of engineering geology respectively. Studies show that number 2 is in an unstable state and number 17 is in a stable state. Consequently, the controlling suggestions associated with practical situation of the project are presented.
Experimental Investigation on Factors Influencing Stable Slope Angle of Granular Accumulation
Authors: Chen Shan , Chen Li , Zhou Min , Huang Jie
Published: October 2013

The stability of granular accumulation such as silt dyke is intimately related to stable slope angle. In this paper, the repose angles of granular medium of different mineral compositions, particle shapes, grain sizes and moisture contents were measured. The mechanical mechanism of granular slope stability was analyzed, as well as influence factors of stable slope angle. The results show that internal friction coefficient f is the key factor. For dry granule, form roughness and surface roughness are the main factors influencing f, leads to different rules of repose angles changing with mineral composition, particle shape, and grain size. With the increasing of moisture content, f increases, the repose angle increases at first, reaches the maximum and then keeps basically stable; the process is affected by the particle surface roughness, water film thickness, and adsorption capacity which is related to the mineral composition, particle shape, grain size of the granular medium.
Research on Soil-Like Slope Instability Based on FEM Strength Reduction
Authors: Wang Chun Ming , Liu Chun Yuan , Wu Mai , Zhao Xin
Published: October 2013

In the construction of mountainous area roads, the similar soil slope is the most common slope form. During the construction, the problem we often meet is how to make the evaluation about the stability of the similar soil slope. The joints exist in the matrix rock, which make great effect on the stability of the slope. The main idea of this article is to analyze the effect of joints and the rain seeped in on the instability of the slope. To solve the problem, the finite element strength reduction theory is taken in this article, and the geotechnical finite element analysis software z_soil is chosen to make the analysis about the instability criterion and the stability in the condition the rain of the similar slope.
Analyses of Traits for Upper Structure in a Powerhouse
Authors: Huang Tao
Published: October 2013

A certain powerhouse with two-row placed units is introduced in this paper. It is mainly analyzed and made sure where the most critical loads and its locations are when the two bridge cranes move with the capacity of 2×350 tons, and then the force on the structure is analyzed and the security capability of workshop is evaluated with two-row placed units. The paper compares with another case which the workshop has only one bridge crane with the capacity of 2×700 tons, and analyses the influence on the structure in order to illuminate the rationality and necessity to use two bridge cranes with the capacity of 2×350 tons. Hydropower station with two-row placed units is so special in forms that it is impossible to make eternal crack between units like general workshop, and the upper frame structure is also complex. It is very necessary to analyze the force state of upper structure and it is in favor of the popularization and application of hydropower station with two-row placed units.
Flow-Induced Micro-Vibration Caused by Xiangjia Dam in Shuifu County Town
Authors: Zhang Li Hong , Liu Tian Yun , Li Qing Bin , Lyu Xiao Ning
Published: October 2013

The flow-induced micro-vibration in Shuifu County Town near Xiangjia Dam is studied in this paper. First the characteristics of the micro-vibration are investigated based on the in situ measurement, and then the dynamic property of the still basin which is thought to be the vibration source is analyzed with the effect of fluid-structure interaction (FSI) considered. Finally, the reason of the micro-vibration in Shuifu county town is discussed and several possible engineering suggestions for vibration reduction are also proposed.
Discussion of Application and Calculation about Surface Precipitation in Midstream of Yellow River
Authors: Xu Ming Yi
Published: October 2013

Surface precipitation calculation and application is a complex problem. It involves not only how to calculate, and more importantly, a broad range of issues of calculation and results which are both closely integrated with application. It mainly includes the reliability, representativeness and consistency of surface precipitation; the calculation of surface rainfall depth and rainfall amount in general different durations, rainfall area and its corresponding total amount in different durations, specified range and different degrees; the calculation of characteristic index of surface rainfall location, area, rain depth, total amount, and the corresponding shape, mobile, development within rain district or fixed area to analysis surface rainfall characteristics and changes. Taken sediment formation and variation of the midstream of the Yellow River as research objectives, this paper presents the flood control design and flood resource application research with larger flood to satisfy the requirement of engineering hydrological calculations, and briefly describes the surface precipitation calculation and research results.
Analysis on the Ecological Restoration Technology
Authors: Liu Jing Xia , Wu Huai Jing , An Zeng Qiang
Published: October 2013

On the analysis of worldwide situation of river ecological restoration, this paper takes the Jialu River in Zhengzhou city as an example, carries out the study on ecological improvement of traditional river projects in six aspects, such as the arrangement of watercourse plane and section morphology, the design of ecological revetment engineering course, the engineering measures to create artificial imitation of natural habitats, the shallow surface flow unit engineering design of wetland and artificial wetland treatment, the protection and combing with floodplain woodland and the plants disposition of waterfront area. The results may provide the reference for the ecological restoration technology.
Wavelet Feature of Precipitation in Quzhou Jiuhua
Authors: Liu Jun Ping
Published: October 2013

Wavelet transform can carry on multi-scale and multi-resolution analysis of the signal through arithmetic function such as stretching and translation and so on .In this paper, applying Morlet complex wavelet performed wavelet transform of the month precipitation time sequence of Quzhou Jiuhua station, and analyzed period on different time scales. The future precipitation was analyzed based on main periods. The result showed that month precipitation has multi-scale characteristic and the main periods of month precipitation are 5-month, 11-month and 26-month. The periodic changes on large-scale nest the periodic changes on small-scale. The wavelet analysis can process signal in time frequency domain, which provide references for development and management of water resources.
Countermeasures Research and Consideration on Reclaimed Water Reuse in Residential District
Authors: Wen Yun , Wang Yan Hong , Liu Luan
Published: October 2013

To establish reclaimed water system for the supply of urban miscellaneous water can alleviate water shortage in cities. For water-shortage cities, sewage recycling has especially significance. Based on the investigation into reclaimed water reuse in urban residential district, this paper explores a new path taking reclaimed water reuse as a new water-saving way to be applied in residential district, studies and analyzes the recyclable feasibility of reclaimed water system in the district, the choice of reclaimed water source, treatment technology and other aspects, and puts forward related suggestions. Some obstacles we have to overcome are also pointed out.
On-Site Metrology Calibration Method for River-Piping Flowmeter
Authors: Wang Li , Wang Cheng , Yang Fei
Published: October 2013

On-site metrology calibration is of practical significance and necessity to promote the rational development and utilization of water resources and to strengthen the management of water metering facilities specification. In this paper, on-site flowmeter calibration method and principle is detailed with standard instrument comparison test, deviation control range of on-site metrology calibration measurement is proposed with the application of error theory. Standard instrument reference method is proved to meet on-site metrology calibration requirements by examples analysis. Further research orientation is also put forward.
Tracing Study of Tributary Mouth Bar in Yellow-River Xiaolangdi Reservoir during Early Stage of Operation
Authors: Guo Xuan Ying , Guo Shao Lei
Published: October 2013

By tracing the performance of China Yellow-River Xiaolangdi Reservoir from operation to 2008, authors found: when the depth of sediment in reservoir tributary ditch mouth is less than 30m or when the length of sediment in reservoir tributary ditch mouth is less than 2km, tributary mouth bar usually will not form. However, when the depth of sediment in reservoir tributary ditch mouth is between 30m and 50m or when the length of sediment in reservoir tributary ditch mouth is less from 2km to 5km, tributary mouth bar tends to form. Moreover, sometimes the mouth bar will show up, disappear and then show up, disappear.
The Fluvial Process of Wandering Reach in the Lower Yellow River
Authors: Guo Shao Lei , Guo Xuan Ying
Published: October 2013

There are three characteristics of river channel which are wandering, transitional, bending in the Lower Yellow River. The fluvial process is complicated and variable. The channel characteristics of wandering reach was analyzed, and then based on the measured data and model test data, the formation conditions, basic characteristics and influencing factor of the fluvial process law in wandering river were analyzed. All of this can provide technical guidance and theoretical support for river regulation of the Lower Yellow River.
A New Method for Generating Arbitrary Polygonal Aggregate of Concrete
Authors: Wang Juan , Yao Xian Hua , Li Zong Kun , Guan Jun Feng
Published: October 2013

An algorithm for arbitrary polygonal aggregate generation is proposed based on secondary development of ANSYS in this paper. It is established on the basis of circular aggregate model, and the central angle is the control parameter to generate poristic polygon as the coarse aggregate of concrete. The concrete numerical samples with first gradation of aggregate and two gradation of aggregate are generated. The aggregate fraction of polygon sample is lower about 20% than the original circular aggregate sample in the statistical sense. The results show that the proposed method can simulate gravel aggregate appropriately as long as the central angle and the aggregate percentage of original circular aggregate sample is reasonable controlled.
Study on Mechanism of Crack on Upstream Surface of Super-High Arch Dam
Authors: Guan Jun Feng , Qing Long Bang , Wang Juan , Bai Wei Feng , Hu Yu
Published: October 2013

A kind of crack with similar characteristics has been discovered on the upstream surface of super-high arch dam. In this paper, the reason of cracking was analyzed by the three-dimensional finite element method. It is found that the stress concentration of concrete near the water-stop structure led to the concrete initial cracking in the process of transverse joint open.
3-D FEM Analysis of Gravity Dam
Authors: Wen Zhong Hua , Liu Gui Rong
Published: October 2013

On the basis of three-dimensional (3-D) FEM, the dam structure and base of gravity dam of Gu county reservoir is analyzed and the stress and displacement is calculated in this paper. The result indicates that a majority of dam is in the stress state and stress concentration exits in dam heel, the dam subjected to a lot on temperature load and has a larger compressive stress in dam heel while temperature raising and a larger first tensile stress when temperature drops down. The stress is small owing to transverse joint.
Study on Warehousing Transportation Plan for Construction of RCC Dam
Authors: Zhao Chun Ju , Yan Yu Chuan , Zhou Yi Hong , Yuan Huan
Published: October 2013

RCC warehousing transportation is always one of the keys factors confined rapid concrete construction. By analyzing several transport mechanical properties commonly used in the RCC dam construction, this paper cites various possible combination plans of warehousing transportation machines in practical construction, chooses reasonable combination plan playing an important role in the construction schedule, project quality and cost control of RCC dam construction.
Static Performance of Face Rockfill Dam on the Principle of Finite Element
Authors: Zhao Yu , Wang Ya Li
Published: October 2013

The concrete face rockfill dam has a strong ability to adapt to the terrain and geological conditions, which is a good choice of dam type for easy construction, short constructed period, safe and good shock resistance. Therefore, the study of stress and deformation in the completion date, normal water level and rapid drawdown is of very important in significance. In this paper, a face rockfill dam is studied by the finite element method.
Three-Dimensional Finite Element Analysis of the Rockfill Dam Panel
Authors: Lu Ling , Yin Xiu Hai
Published: October 2013

Three-dimensional (3-D) model of the real terrain is established to see the panel stress and deformation during different periods of the concrete face rock-fill dam (CFRD). Goodman element numerical simulation is adopted in the panel and contact surface. The analysis process can better reflect the stress and deformation distribution of the panel. This research provides an important theory basis for the practical engineering design.
Stability Analysis of Xiping Hotel Iron Sites Based on Expansive Soil and Steep Slope
Authors: Ma Qing Wen , Wang Tuan Jie , Ren Ke Bin
Published: October 2013

Xiping iron smelting site is the fourth installment of the national key cultural relics protection units. The protective house is surrounded by water, with its base on expansive soil. With the influence of the slide of dams during the flood season, a lot of cracks occur in the protective house and its surrounding, resulting in severe potential danger to iron smelting site. The effect of expansive soil, steep slope reservoir and rainfall on house deformation is analyzed, qualitative and quantitative analysis on slope stability is conducted, results indicates that the protective house will be damaged under rainstorm or continuous precipitation, basic stability will be lose under natural condition.
Analysis of Pile Stress during Static Pressure Pile Penetration
Authors: Zheng Hua Mao , Xiao Zhao Ran , Chen Huai
Published: October 2013

Static pressed pile in the sand is a complex process. In this paper, strain of each point in the process of model pile sinking was measured by lab model test, the relationship of stress and strain of piles and the corresponding stress coefficient are made by semi-numerical and semi-analytical mathematical methods, the distribution of confining pressure and friction are built, and the calculation of sinking pile resistance in the process of construction is given out. The result provides the directive reference for the design of static pressure pile.
Experimental Study on Shrinkage of Concrete with Recycle Crushed Brick Coarse Aggregate
Authors: Liu Qin , Zhang Xiao Na
Published: October 2013

In this paper, shrinkage deformation of concrete with recycled crushed brick coarse aggregate was experimental studied, effects of curing age, strength of concrete and environmental conditions on shrinkage of concrete are analyzed. Based on regression analysis of test data, the formulas for estimating the shrinkage deformation of recycled coarse aggregates concrete are given out, which provide the basis for engineering applications.
Determining the Pile Bearing Capacity by the Curve Match Method of High Strain Dynamic Testing
Authors: Ding Wei , Liu Qing , Wang Bing Yu , Sun Kang Kang , Sui Feng Tao
Published: October 2013

This paper determines the bearing capacity of pile and shaft resistance by the curve match method of high strain dynamic testing. By the comparison of bearing capacity of pile between the testing results of static loading and dynamic high strain, the reliability and surveying precision of the curve match method is analyzed, and the error sources and reasons are explored, to reasonably determine the design parameters of pile foundation engineering.
A Prediction Method of Bearing Capacity of CFG Pile Composite Foundation Based on Support Vector Machine
Authors: Liu Qing , Ding Wei , Kang Kai , Han Xiao , Wang Bing Yu
Published: October 2013

A prediction method of bearing capacity of CFG pile composite foundation was presented based on that support vector machine and corresponding prediction model was set up. To obtain the model coefficients, 18 groups of test data of CFG pile composite foundation were trained, the training value conforms well to the test value. Then the model was used to predict another 4 groups of test data. The result showed that the prediction value was close to the test value. The theoretical analysis and practical example indicated that the prediction method of bearing capacity of CFG pile composite foundation based on support vector machine is accurate and reliable.
Application of Anchoring Concrete Filling Piles in Deep Foundation Pit Engineering at Zhengzhou North Freight Marshalling Station
Authors: Zhang Xin Zhong , Cheng Yong Jun , Tang Ke Dong
Published: October 2013

This paper introduces the "Levels of anchor cable +Bored piles +Net shotcrete combined support plans application in deep foundation pit engineering at Zhengzhou north freight marshalling station. Construction practice and monitoring data show that the engineering supporting design and construction have got an ideal effect, to ensure the safety of the north Ring Bridge and the railway line. It has a certain guiding significance to similar municipal engineering.
Numerical Simulation of Bored Pile-Soil Interface Shear Performance
Authors: Liao Qian Xu , Cao Jin , Tang Jun Wei
Published: October 2013

This paper derives a numerical simulation of direct shearing test and model pile test based on the measured data of bored piles. Characteristics of the interface between bored pile and soil around it are analyzed. Laws of the magnitude and the distribution range of point resistance and frictional resistance of the bored piles in granular and clayey soil are obtained and the mechanism on them is explained.
Calculation Analysis on the Prestressed Pier
Authors: Tang Ke Dong , Sun Liu Ying , Guo Xue Mang , Wang Kang Zhu
Published: October 2013

In this paper, large-scale finite element structure analysis software ANSYS is used for calculation and analysis of spillway prestressed pier, the rationality of shape design of the spillway side pier structure is demonstrated, the layout scheme and persistent tonnage of the prestressed anchor cable is optimized. The results can provide reference for design of similar structures.
Earthquake Damage and Design Requirement of Stair in Frame Structure
Authors: Cheng Yuan Bing , Wang Kang , Ren Yong Qiang
Published: October 2013

In building structure, staircase is more complex and relatively weak. As an important emergency routes when earthquakes and other emergencies (such as fire, explosion, etc.) take place, stairs subject highly evacuation live or seismic load, destruction of the stair caused delay of evacuation and affected the commencement of rescue work, and produced serious injury or death. Investigation of Wenchuan earthquake damage also finds that many stairs broken before the main structure. In the current code for seismic designof building, seismic design advice of stairs was only given instructionally, and specific calculation methods and construction requirements were lacked. Based on the analysis of earthquake destroy of stairs in frame structure, this paper proposes some design requirements of stair.
Study on Far-Field Ground Motion Characteristics
Authors: Chen Gong Lian , Lu Wen Zheng , Wang Lei , Wu Qi
Published: October 2013

In order to study the far-field ground motion characteristics and the attenuation of seismic waves, the peak ground acceleration (velocity, displacement), time of duration and response spectrum of the seismic waves were analyzed in this paper. Through the investigation of earthquake wave propagation process, the seismic attenuation low was analyzed. This study can provide technical support for the seismic design of long period structures and related engineering application.
An Improved Source Model for Simulation Near-Field Strong Ground Motion Acceleration Time History
Authors: Zhong Ju Fang , Zhang Long Wei , Liang Jun Wei
Published: October 2013

The key to near-field strong ground motion simulation based on stochastic finite fault method is to determine the spectrum of ground motion. We present an improved source spectrum model for simulation near-field strong ground motion acceleration time history. We combine Masudas source spectrum model with scaling factor Hij to keep radiation energy conservation and reflect the energy decrease with frequency at low to mid frequencies. We calculate the Fourier amplitude spectrum Fa, accelerate response spectrum Sa, velocity response spectrum Sv and displacement response spectrum Sd of simulation time histories. By comparative analysis of the laws of spectrum values (Fa, Sa, Sv, Sd) with the variation of frequency or period, we discusses the effects of sub-fault dividing scheme, the method of determining scale factor and source spectrum model on spectrum values (Fa, Sa, Sv, Sd). The results show that sub-fault dividing scheme has slightly effect on the model presented in this paper, and the model enable to reflect the sink laws of source spectrum value in mid-to-low frequencies well. We demonstrate that the improved model is superior to other commonly used models.
Influence of Masonry Infill on the Dynamic Characteristics of RC Frames on Slope Part (I): Background and the Infill Model
Authors: Chen Zhi Xiong , Hu Ying
Published: October 2013

Buildings on the slope are widely used and have been increasing in mountainous city. The object of this study is to study the influence of masonry infill on the seismic characteristics of RC frames on slope. The concept of slope building is introduced, and the proposed infill model is presented. It is a single equivalent strut model with the compression and tension behavior. The proposed infill model uses the energy-based cyclic degradation law to simulate the deterioration of the infill during the seismic action. In the Part (II) of the paper, the infill model is calibrated, and the performance of different reinforced concrete two bay-frames, bare and infilled, subjected to eight seismic motions was investigated.
A Simple Method of Coarse Aggregate Generation Based on PFC2d
Authors: Kong Yu Tian , Wang Juan , Li Zong Kun , Zhang Li Hong
Published: October 2013

To establish an appropriate random aggregate model at meso-level is the basis for successfully simulating the meso-mechanical behaviors of concrete. This paper proposes a new simple method to generate random aggregates of concrete by PFC2d. And the distribution of aggregate in the two-dimensional concrete specimen cross-section is determined by Walraven formula. The results show that the numerical aggregate distribution matches well with the theoretical grading curve.
Applications of Explicit FEA in Structural Static and Dynamic Analyses
Authors: Qi Yong Sheng , Zhao Feng Hua , Zhou Jun Wen
Published: October 2013

Non-convergence often occurs in the solution of highly nonlinear problem by conventional implicit finite element method. As another choice, explicit method is sometimes used by researchers. Through 2 typical static and dynamic examples this paper verifies that explicit finite element method can provide the same exactness of calculation as the implicit method even in the situation that the duration of action exceeds the natural period of structure greatly. At the same time, compared with implicit method, explicit method possesses higher speed, more robust algorithm, and stronger nonlinear capability, so that explicit method can be applied in static and dynamic analysis of structures, especially in large deformation and highly nonlinear problem.
Evaluation of Relations among Basic Mechanical Properties of Fly-Ash Concrete with Machine-Made Sand
Authors: Liu Chun Jie , Jia Chun Yan , Li Chang Yong
Published: October 2013

Although the machine-made sand was widely used for concrete in recent years in China, it was short of studies on the relations among the basic mechanical properties of fly-ash concrete with machine-made sand (MSFAC). However, these relations such as the compressive strength, the tensile strength and the elastic modulus with the cubic compressive strength (i.e. strength grade) are the basis of design for concrete structures. This paper summarizes the test data from the published references, and discusses the relations among these properties by statistical analyses compared with those of ordinary concrete. The results show that only the tensile strength of MSFAC can be safely forecasted by the same formula of ordinary concrete specified in current Chinese design code. When the strength grade is higher than C45, the axial compressive strength of MSFAC is largely forecasted by the formula of ordinary concrete. The elastic modulus of MSFAC is larger than that of ordinary concrete, which should be prospect by the formula in this paper. This work gives out some cautions for the proper use of the MSFAC in concrete structures.
An Efficient Calculation Method for Seismic Spectral Analysis under Multiple Support Excitations
Authors: Guo Jin , Wang Jun Jie
Published: October 2013

The seismic spectral computation of structures is time-consuming under multiple-support excitations. The seismic spectral response of structures can be expressed based on several correlation coefficients and the time consumption can be greatly reduced if the coefficients are expressed in closed-form. In this paper, approximate expressions of spatial coherence functions are suggested. Then integrals for the coefficients are carried out analytically and their closed-form expressions are obtained. The closed-form expressions are developed from Clough-Penziens APSD and Hus APSD. The numerical results show that the approximate closed-form expressions of correlation coefficients are of enough engineering accuracy and high efficiency.
Study on Seismic Performance of CFST Frame and Truss
Authors: Yang Ya Bin , Cao Wan Lin
Published: October 2013

Concrete filled steel tube (CFST) got a good application in actual project. In order to further the seismic performance of the CFST, experiment was carried on two 1/5 scale models, which included one CFST frame, one CFST truss. Based on the experimental study, load-carrying capacity, stiffness, ductility, hysteretic property, energy dissipation and failure phenomena of each model were analyzed. The study shows that the seismic performance of CFST truss has high bearing capacity, stiffness, energy dissipation capacity and good ductility.
The Influence by the Method of Aggregate Enveloped with Cement of Multi-Step Mixing to Durability of High Performance Concrete
Authors: Fu Xiang Hong
Published: October 2013

Concrete multi-step mixing technology means the construction technology of multi-step material mixing and multi-step stirring. Based on the tests about impermeability, frost resistance and anti-carbonization in the same material and the same proportioning using the method of aggregate enveloped with cement of multi-step mixing technology, it demonstrated that the method of aggregate enveloped with cement can obviously improve the performance of concrete on impermeability, frost resistance and carbonization resistance.
Dynamic Analysis of Cold-Formed Steel Villa
Authors: Fu Jian , Sun Xiao Na , Huang Rong
Published: October 2013

In this paper, the finite element analysis software ANSYS is used for modal analysis and dynamic analysis of a cold-formed steel villa to calculate its natural frequency, vibration period and dynamic time history curves. The analysis provides a basis for cold-formed steel villas design and has a certain reference value for similar projects.
Study on Failure Mode for Power Intake Structure under Seismic Action
Authors: Tian Lin Gang , Zhen Bin Bin , Huang Hu , Shen Jing
Published: October 2013

This paper studies on the ultimate failure modes and bearing capacity of high intake tower under the action of seismic load based on nonlinear concrete model. By monitoring the way of crack development and failure process of the tower to study failure mode under the action of various seismic wave, we can conclud that the regional distributions of the structural crack of tower body vary with the duration of an earthquake. In the early period of earthquake, the crack has little effect on the whole structure. After duration of the earthquake, the structure forms penetrable cracks. By studying the cracks development and distribution on the structure of tower body under the action of various seismic waves, we know the failure process and failure mode of high intake tower. The conclusions provide evidence for engineering design and seismic analysis of pertinent engineering.
Seismic Affection Analysis of Weir Dam Based on 3-D FEM
Authors: Yue Jin Chao , Zhang Xiao Bin , Ye Ling Min
Published: October 2013

The vibrant-type-disintegration method is applied to calculate structure seismic action of a weir dam. Based on calculation and analysis of the weir dam, special attention is paid to the stress state of key parts. The results show that the displacement and stress of weir dam are affected by earthquake excitation direction. Since large principal tensile stress appears in the joint of girder and pier, and the zone of principal tensile stress is large because of the thrust of radial gate and steep changes of geometry shape, we should pay special attention when calculating anti-seismic checking and reinforcement arrangement.
Functional Reliability Analysis of Post-Earthquake Water Supply System
Authors: He Shuang Hua
Published: October 2013

Conventional demand-driven models of water supply system are formulated under the assumption that nodal demands are statistic constants, which is not suitable for the cases where nodal pressure is not sufficient for supplying the required demand. An efficient approach for pressure-dependent demand analysis was developed to simulate the hydraulic states of the network for low pressure scenarios, and the mean-first-order-second-moment method was introduced to do the functional reliability analysis of post-earthquake water supply system, which can be applied to further study for seismic performance control analysis of water distribution system.
Influence of Buried Depth on Seismic Responses of Water-Conveyance Tunnel Concrete Lining
Authors: Li Xin , Han Qiu Rong
Published: October 2013

The paper is combined by the 2nd phase engineering of Dahuofang water-conveyance tunnel. The 3D finite element models of the circular tunnel were built to analyze the seismic responses of the concrete lining under homogeneous rocks and nonhomogeneous rocks. The stress distribution of the concrete lining was studied under different buried depths. The results show that the seismic responses of the concrete lining magnify first and then reduce with the increase of the buried depth. The maximum stresses appear when the buried depth is up to 25m. It affords an important engineering reference for tunnel site selection, design and construction.
Nonlinear Amplification of Seismic Ground Motion by Twin Cavities
Authors: Liang Jian Wen , Liu Ming Liang
Published: October 2013

This paper presents nonlinear amplification of seismic ground motion by twin cavities in layered sites. The equivalent linear method is used in the dynamic analysis and Lysmer-Kuhlemeyer transmitting boundary is used at the left and right boundaries of the computation region. It is shown that, cavities have significant effect on seismic ground motion, and soil nonlinearity has significant effect on seismic ground motion around cavities. The PGAs in linear and nonlinear analysis may be increased by 24.4% and 19.2%, compared with those in the free-field response. The PGA in nonlinear analysis may be decreased by 44.6%, compared with that in the linear analysis.
Nonlinear Amplification of Seismic Ground Motion by Alluvial Valley
Authors: Liang Jian Wen , Liu Ming Liang
Published: October 2013

This paper studies nonlinear amplification of seismic ground motion by alluvial valley in layered sites. The equivalent linear method is used in dynamic analysis and transmitting boundaries are added at boundaries of the computation region. It is shown that, soil nonlinearity has significant effect on seismic ground motion around alluvial valley. The amplitudes in the case of linear alluvium and soil layers are the largest, those in the case of nonlinear alluvium and soil layers are the smallest, and those in the case of nonlinear alluvium and linear soil layers fall in between. The periods in the case of nonlinear alluvium and soil layers are the longest, those in the case of nonlinear alluvium and soil layers and those in the case of linear alluvium and linear soil layers are almost the same.
Study on the Effect of Blocks on Seismic Performance of Improved Multi-Ribbed Slab Structure
Authors: Qian Kun , Xia Tian , Zhang Jie , Yuan Quan
Published: October 2013

In order to confirm the calculation model of multi-ribbed slab structure and transmission of earthquake action, this paper improved existing multi-ribbed slab structure. The calculation model of improved multi-ribbed slab structure confirmed the stress relationship among three seismic fortification lines, and the transmission of earthquake action became clear, the same calculation model could be applied in structural analysis. For studying the features of characteristic parameters of restoring force changing in the first seismic fortification line, blocks, and correcting the parameters, the experimental study was carried out. The experiment shows that when a unidirectional horizontal load was applied, that blocks in grid frame could be regarded as a slanted strut that with specific section and elasticity, the ideal slanted struts nominal elastic modulus is roughly in 20~60 N/mm2.
The Application of Straw Concrete Wall Board in Constructional Engineering
Authors: Qian Kun , Xia Tian , Zhang Jie , Yuan Quan
Published: October 2013

Constructional engineering was always faced with the threaten of earthquake and the problem of large energy consumption. As a new type of green building material, straw concrete has better ductility than normal concrete. In the straw concrete multi-ribbed slab structure, as the filling material of wall board, straw concrete improved the energy dissipation and deformability of wall board. When the load was applied, the filling blocks, grid frame and outer frame in straw concrete wall board work cooperatively, have good mechanical properties. The straw concrete wall board has advantages that light, high strength, energy conservation and seismic resistance. Considering the effect of different components in straw concrete wall board, this paper proposes the formula of vertical bearing capacity of straw concrete wall board to provide the basis for engineering application. The construction of straw concrete multi-ribbed slab structure include three processes that steel bar bind, blocks prefabrication and integral pouring, which fits for field fabrication in the building construction site.
Risk Assessment of Reservoir by Fuzzy Comprehensive Evaluation Method Based on Information Entropy
Authors: Song Yong Jia , Jin Cong Cong , Zhang Xian Cai , Li Jing
Published: October 2013

This paper proposes a new risk assessment model on account of the fuzziness and uncertainty of risk factors in the reservoir after earthquake. The paper adopts methods of information entropy and fuzzy mathematics to assess risk level of the model. After analyzing the statistical data of earthquake-damaged reservoirs, we present comprehensive weight composed of importance and improved entropy weight. Base on comprehensive weight, we can adopt membership function to establish single factor evaluation of the model. Moreover, we combine fuzzy weighting method to assess risk level of a reservoir after earthquake. The result shows that risk level of the reservoir is high-risk. The case study verifies the practicability and rationality of the risk assessment method. Therefore, the method could be applied in the emergency rescue and reinforcement for reservoir after earthquake.
Quality and Maturity of BIM Implementation in the AECO Industry
Authors: Giel Brittany , Issa Raja R.A.
Published: October 2013

The overall adoption of Building Information Modeling (BIM) has increased considerably in recent years; however, utilization of BIMs post-construction is still seldom explored or documented. Much of this may be due to the fact that there still remains great inconsistency between stakeholders levels of BIM proficiency. In order to achieve a life-cycle use of BIMs, it is critical that the Architecture, Engineering, Construction, and Operations (AECO) industry determine if it is moving closer to achieving a mature BIM standard or if organizationally it is still just grazing the surface of what BIM can do. Based on a survey of a diverse sample of the construction industry, this study evaluates the quality and maturity of BIM implementation across various organizations as well as the quality of BIM execution on current construction projects.
Whole Life Care of Infrastructure – A Serious Challenge for Civil Engineers
Authors: Li Chun Qing
Published: October 2013

Infrastructure undergoes a number of phases during its whole service life: from planning, design, construction, operation (or service), rehabilitation and final demolition end of life. One of the most challenging issues facing civil engineering profession is the intelligent management of infrastructure to ensure its safe and serviceable operation and function. This paper will present a paradigm for the whole life care of infrastructure. Based on recent research and findings in corrosion affected concrete structures during its whole life of service, methods and models to be used in the paradigm will be outlined. Discussion on challenges in each area will also be provided. This paper will advocate that whole life care of infrastructure is the future trend for civil engineering progression.
Construction Safety Management from Perspective of Stakeholders
Authors: Zhang Kai
Published: October 2013

China is one of the most countries that invest considerable money on fundamental construction. How to reduce the occurrence of safe accidents and ensure the realization of construction safety has become focus of the whole society. In the perspectives of stakeholders, the construction project stakeholders can be divided into core layer, strategic layer and outer circle layer from three dimensions of qualitative analysis and judgment. Some effective suggestions for construction safety management are put forward.
Research of Construction Process Quality Control in Building Engineering
Authors: Xu Dong Ming , Yang Kai Wen , Shi Yi Jun
Published: October 2013

By analyzing the points of construction process quality control in the building construction project and the relationship among quality control, cost control and schedule control, the main factors affecting the construction process quality control in the building construction project are given out, and a practical system is established. This system includes pre-construction quality planning, quality control, drawings reviewing technical tests, building products quality control, responsibility for quality and other aspects. The practical application of this system in some building construction projects proved its effectiveness in the project quality control.
Empirical Study upon Management Collaboration in Construction Projects
Authors: Zhen Zhi Lu , Jian Jian Ru , Zhang Yan Bin
Published: October 2013

To study what and how factors impact on inter-organizational and inter-divisional collaboration in construction projects, a management collaboration model was established, and eight indicators of the model were figured out. A questionnaire including 20 questions designed and delivered to 488 participants from 85 projects, the data of samples analyzed and the correlation of variables calculated by multivariate software named R. Results show that 92.70 percent of respondents suggest that the different project objectives, the different organizational culture and the poor information exchange and communication are the core factors leading to conflict between the participant organizations. Multivariate statistical analysis results show that greater inter-divisional collaboration, more harmonious interpersonal relationship, slighter sense of hierarchy, stronger orientation of democratic management style, and better information exchange and communication can generate less conflicts and better inter-organizational collaboration.
Discussion on Issues and Solutions in Enterprise Information Construction from the Perspective of Engineering Economics
Authors: Qi Ge Qi
Published: October 2013

The enterprise information construction is mainly for enterprise standardization, to improve the overall management and the work efficiency of entire enterprise. In order to make enterprise do better information construction and enhance core ability of competition by appropriately using the knowledge of engineering economics, truly putting the modern sciences and technology knowledge into the construction practice, improving the knowledge economic benefits and accelerating the economic development of enterprises, and adapting to the rapidly growing global information age, this paper discusses the problems in the enterprise information construction and puts forward the corresponding solutions from the viewpoint of information economics.
The Conception of Sustainable Development on Architectural Configuration of Traditional Arcade
Authors: Li Wen Li , Zhang Bin
Published: October 2013

The contradiction between traditional arcade building and modernization process arose gradually and restricted the development of arcade. With the accelerated urbanization, the interruption of inheritance and continuation of this type of architecture with regional characteristics turned up. Based on the theory of modern urban space, the architectural configuration is regarded as the breakthrough point, where the arcade building is deeply analyzed from three aspects of spatial configuration enrichment, substance function expansion and place spirit deepening. To provide the basic idea and method for achieving sustainable development, some relevant strategies and conceptions on inheritance and development of arcade building are put forward.
Study on the Implementation and Development of the Green Building in China
Authors: Li Jie , Wu Chang You , Qu Wan Ying , Wang Fang , Li Wan Zhen
Published: October 2013

This paper analyzes the concrete measures to the starting point of the Chinese Green Building's Implementation, and puts forward some suggestions on China's development of green building, which is to strengthen the publicity and legal system construction, perfect the relevant evaluation system, vigorously promote new technology and new method of green building, and strengthen the leading effect of outstanding buildings etc.
Research of Optimization Methods on Ecological Construction Scheme
Authors: Zeng Gui Xiang
Published: October 2013

Ecological architecture is the sustainable building with broad space for development. Pros and cons of the construction scheme have great effects on the quality, cost and time limit of a project, the best one is pretty necessary to be chose. This paper put forward the fuzzy multiple attribute decision on the basis of the analysis of advantages and disadvantages of various methods, studies the applicability of the construction scheme optimization combined with the optimization example. The results have a strong guiding role on the construction enterprise construction scheme.
Analysis on Rationality of Configuration of Urban Residential Quarter-Level Commercial Service Facilities
Authors: Zhang Shao Wei , Song Ling
Published: October 2013

Commercial service facilities in the level of residential quarters are important in the lives of the residents, which is also an important standard to measure the satisfactions of the residents. With the analysis of the demand for the living environment, the study discusses the respective behavior and the characteristics of activities. Based on the analysis, it concludes the principles of the layout and the display of commercial service facilities in residential area providing basic information for creating a safe, convenient, comfortable living environment.
Study on Technical Disclosure in Construction Based on BIM
Authors: Xu Ning , Wang Long
Published: October 2013

The importance of technical disclosure in construction of project is described and the necessity of application of BIM (Building Information Modeling) technology used in technical disclosure is analyzed correspondingly. Many actual cases of technical disclosure in construction used BIM technology in our company with its application are discussed subsequently. The results show that the BIM technology can simplify the procedures of technical disclosure on the construction phase, and multi-software work together based on BIM provides a guidance for different types of projects. Many advantages of BIM such as construction simulation, 3D roaming can improve the quality of technical disclosure. Finally, recommendations and requirements for the specific implementation of BIM on the construction phase are proposed: the BIM model for technical disclosure is the most unique model in the entire life cycle; the locally refined extent is much more than the final completion model, which should be paid more attention to in the whole process of program development when BIM implemented.