bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence Factors of Chinese Real Estate
Authors: Wang Xue Li , Hua Shan
Published: September 2013

This paper studied that the factors influencing Chinese real estate price. And that the land prices, the macroeconomic situation, the annual income of the households, the process of urbanization, the credit policy, the psychological expectations of consumers, the market investment or speculation, the governments regulation policy etc, Are all the influence factors of real estate prices. And the analysis results to develop appropriate policy recommendations for the healthy and sustainable development of the real estate market.
Study of Project Duration Risk in the Network Diagram Based on Matrix Algorithm
Authors: Li Tao , Qiu Wen Ge , Wang Li Chuan , Man Shuai
Published: September 2013

The probable route sets in the network diagram were calculated by adjacency matrix method, and based on the assumption that activity becoming the key obeyed 0-1 distribution, a probable route matrix was established. A random variable matrix was structed by monte carlo simulation under condition of activity time independent distribution. A matrix algorithm model was built by isolating activity times impact on activity becoming the key for the first time. This model with a simple and optimal algorithm avoided the computation complexity of network planning time parameter, to evaluate project duration risk rapidly and statistical analyze the probability of activity becoming the key and the influence degree of activity time fluctuation impacting on project duration, providing theoretical and data support for decisions. Empirical research on a tunnel engineering project verified its practicability and feasibility, providing a new powerful tool for assessing project duration risk in the network diagram quickly.
BIM Technology Application in the Construction Industry in China Current Situation and Developmental Disabilities Research
Authors: Li Jian
Published: September 2013

BIM technology developed in Europe and America has been more widely applied in the construction industry but in the construction industry in China is limited to some of the institute in carrying out large-scale applications. This paper analyzes the application of BIM technology in our current situation and obstacles to development, and based on BIM technology relationships with related parties, explain its application in our country development prospects.
Establishment of Quality Cost Control Balance System Forconstruction Enterprise
Authors: Zhang Yan , Mu Jun Sheng
Published: September 2013

Quality is the life of the construction enterprise,reducing the cost of construction is the goal of enterprise pursuit, the factors must be considered are analyzed in the establishment of construction enterprise quality cost control system, according to the observation, comparative observation and expected results, when necessary corrective action steps, the quality cost control system is established in construction enterprises, in order to achieve the best balance of quality and cost of the construction enterprise
Analysis on Investment Risk of Hydropower Project
Authors: Xue Yu Feng
Published: September 2013

Pre-estimate of hydropower project investment risks is of much importance because of the huge economic loss caused by the negative effects of the risk factors. Components of cash flow of hydropower project investment and finance evaluation are presented to study the effect of investment risk variables on hydropower project based on the structure of hydropower project investment and benefits. The project investment risk and index are evaluated by the simulation technique, which provides a basis for scientific decision-making of the project.
Numerical Analysis of Bridge Caisson Foundation due to Riverbed Erosion
Authors: Liu Wen Tsung , Chang Chia Chyi , Cheng Kuei Hsiang , Chi Chen Wei
Published: September 2013

Keywords： Scour Depth, Water flow Force, Finite Element Method
ABSTRACT. In recent years, the researches on the impact stability of piers based on river erosion are concerned in Taiwan. Therefore, it is an important issue to estimate accurately the scour depth, to calculate the water flow force on bridge pier, and to establish the close mechanism of bridge for saving lives.
This research is a case study on Paulon Bridge by finite element method (FEM) Plaxis 3D Foundation for simulating analysis the caisson foundation in bridge pier scour. Firstly, we infer the flood level, the speed of flow in the different frequency year, the whole bridge safety coefficient, and the inclination angle of pile based on the simulating analysis to build the warning system. We compare the data by FEM and observing data in order to confirm the validity of FEM.
Prediction of Construction Schedule Based on BP Neural Network
Authors: Li Zhao Lin , Zhang Guo Zhi
Published: September 2013

Schedule control is the major issue in project management, and to predict the construction schedule effectively is important practically. The article mainly predicts the schedule of a project based on BP neural network. The result shows that the predicted value is more accurate than the value calculated by linear method.
Discussion on Function Analysis Stage of Value Management in Construction Industry
Authors: Zhang Yan , Mu Jun Sheng
Published: September 2013

Functional analysis is the focus of the value management,The functional analysis consists of three stages:Function definition, function evaluation and selection schemeIn this paper, In view of the construction industry, each stage of the functional analysis were studied,and the value management in the construction industry how to effectively implement were discussed.
Research on Project Variation for Contractor to Create Profits under Standard Construction Bidding Document
Authors: Yan Ling , Chen Lina
Published: September 2013

The project variation is the main income source of contractor. Thereinto, alterations of base line, elevation, position, or dimension of contract project are the key points for contractor to realize the profits of project variation. The paper firstly, through relevant documents, analyzes the connotations and main conditions to alter the base line, elevation, or dimension of contract project under Standard Construction Bidding Document (2007 edition); secondly, recognizes the opportunity points to realize profits; at last, puts forward specific measures for contractor to create profits in light of profit opportunity.
Identification of Influencing Factors on CO2 Emission of Bridge Projects in Taiwan
Authors: Huang Rong Yau , Tsai Tsung Yi , Chen Chao Hsiu
Published: September 2013

Greenhouse effect and greenhouse gas mitigation practices are becoming global issues in recent years. The government in Taiwan has also developed policy to reduce CO2 emission and save energy in construction of public projects. The objective of this research is to identify the influencing factors on the CO2 emission of bridge construction projects in Taiwan. Examples of those factors are the type of superstructure, the type of lower structure, the construction methods, the location of the project, and so on. The rules of Carbon footprint are used to calculate the CO2 emission of around 31 bridge construction projects in Taiwan. Results of the calculation of these case projects are then compared to each other for analysis to identify the influencing factors on the CO2 emission of bridge projects in Taiwan. Public owners and designers can refer to those identified factors for constructing bridges with lower CO2 emission. The goal of reducing CO2 emission in construction can be facilitated.
Introduction to the Construction Management of Architectural Decoration
Authors: Zhang Guo Quan
Published: September 2013

Architectural decoration decoration materials are used by people or decorations, the building and space for all kinds of surface treatment, the use of in order to improve the building comfort.In architectural decoration, engineering quality is directly related to the credibility of enterprises and the effect of the project, and use function. In this paper, from the architectural decoration construction technology management and quality control two aspects to discuss. First of all analyzes the optimization measures of architectural decoration construction technology management, the second for the quality control of several factors is analyzed and summarized.
Standard Bridge Engineering Supply Chain Behavior Analysis Using Computer Simulation Technology
Authors: Pan Nai Hsin , Lee Ming Li
Published: September 2013

This paper tries to use systematic approaches for analysis and design of the construction supply chain operation model. According to the Supply Chain Operations Reference Model, SCOR Model of Supply Chain Council, SCC in 1996 and based on this model and application to the SCOR Model, this research places focus on the supplydemand behaviors of the Taiwan High Speed Railroad (HSR) construction process as a case study. This paper uses the concept of SCOR Model and appliance to Dynamic Simulation software, namely, SIMPROCESS, trying to assist in establishing a hierarchical model to explore the behavior of construction supply chain process and developing a performance evaluation method which can help improve supply chain management (SCM) of the construction project.
The Failure Mode Analysis of Open Pit Slope Base on Finite Element Method
Authors: Meng Hai Dong , Xu Yan , Zang Dong Yuan
Published: September 2013

This paper is aimed at analysing the slope failure model for an open pit slope. Firstly, The method of engineering geological survey is carried out for the open pit south slope. Then, the appropriate geological model is established. And the slope model of the open pits was established and solved by finite elemen program. The analysis reveals the internal sliding of the open-cut and the failure modes of bottom sliding along the base weak level. It will be an important guiding significance for the safe production of open pit coal mine.
The Potential of Context-Aware Computing for Building Maintenance Management Systems
Authors: Zakiyudin Mohd Zulakhmar , Fathi Mohamad Syazli , Rambat Shuib , Mohd Tobi Siti Uzairiah , Kasim Narimah , Latiffi Aryani Ahmad
Published: September 2013

The increasing awareness of the importance of a proper building maintenance management system becomes the main contributing factor for the development of facilities management worldwide. Various building maintenance management system tools become necessary to remain competitive. The widespread use of mobile devices envisions a growing market for new applications in building maintenance. It is well-understood that the use of mobile technologies is critical in building maintenance as the right information needs to be delivered to the right person, at the right time, and at the right place. However, existing building maintenance applications only support the delivery of static modes of information (such as building data and checklists); the information is pre-programmed and is thus not able to take into account the users varying contexts. Building maintenance applications could be made easy and responsive to users wishes if they were context-aware. This paper discusses the key issues in building maintenance management systems and their potential for the use of context-aware computing. Findings show that many building maintenance management systems are complicated and only slowly being adopted in Malaysia. In conclusion, it was found that context-aware building maintenance systems have the potential to simplify the process and increase the usage of computerized maintenance management systems.
Study on the Influence of Variable Water Temperature on Seepage in Single Fracture
Authors: Xu Wei Sheng
Published: September 2013

approximate analysis formula for the water flow of single fracture and variable water temperature has been deduced considering the impact of water temperature to rock fracture seepage. Following conclusions were drawn: (1) The water head and the hydraulic gradient in single-fissure have nonlinear relation. Seepage curve was convex curve if water flows from higher temperature areas to lower temperature area. On this condition, the water head slants low under liner seepage simplification. On the contrary, Seepage curve is convex curve if water flows from lower temperature areas to higher temperature areas, and the water head slants high. (2) In a single fracture, the hydraulic gradient is smaller in the higher temperature zone and is larger in the lower temperature zone. The higher the mean water temperature of fracture was, and the faster the flow velocity was.
3D Finite Element Analysis of Negative Skin Friction (NSF) Behaviors in Pile Groups with Cap
Authors: Xia Li Nong , Hu Hai Tao , Miao Yun Dong , Liao Chang Bin
Published: September 2013

The pile-soil interactions are constrained by the pile cap in pile groups with cap, while mutually independent in pile groups without cap. The mechanism of changing of NSF in pile groups with cap are analyzed briefly. The NSF behaviors of pile groups with cap under the condition of groundwater level lowering are analyzed by three-dimensional finite element method. The analysis shows that the NSF of pile groups with cap is generally similar to that of a single pile: as the working loads on cap increasing, the neutral point moves up, additional settlement increases and the downdrag decreases, though there are differences between piles in different positions. The constraints of settlement of piles in various positions by the cap are significant when the working load is not large, so that the neutral point of piles are almost coincident. As the working load increasing, the deformation of the cap increases and the neutral point of piles become more various, lowest for the corner pile, second for the perimeter pile and highest for the interior pile. The NSF of each pile in pile groups with cap mobilizes differently along the depth. It is mobilized most fully for the corner pile, second for the perimeter pile and least for the interior pile.
Fatigue Behavior of CA Mortar in CRTS-I Ballastless Track under Train Load
Authors: Du Hua Yang , Liu Guan , Su Cheng Guang
Published: September 2013

By means of the finite element (FE) method, the beam-shell model on elastic foundation of CRTS-I ballastless track was established. On the basis of Palmgren-Miner linear cumulative fatigue damage criterion, life cycle analysis method was used to analyze the CA mortar fatigue life under different train loads. Results show that the overall average CA mortar life is 10 to the 11th power. As the train load increases the CA mortar fatigue life decreases, the biggest drop is 4.1 percent. The danger areas of CA mortar fatigue life are on the slab ends. It is suggested that maintaining the CA mortar on the slab ends should be considered as the main task during the maintenance.
Data Analysis on Safety Monitoring of Group Pile Foundation Based on Valuation Fusion Algorithm
Authors: Xue Tao , Sun Yi-Ou
Published: September 2013

The transfer mechanism of super-large deep-water pile group foundation is quite complex, the traditional design and construction technology has been unable to meet building requirements while the applications of new technologies and new processes are lacking technical support. At present, the informatization in whole construction process basing on safety monitoring is an effective way to solve the problem. To ensure the safety monitoring system to work properly, the sensors are often redundant layout. however, the redundant data would cause data inconsistency and even contradiction. In order to eliminate this contradiction and to have the real force characteristics of pile group foundation, the valuation fusion algorithm was used in mult-sensors data fusion analysis. The result shows that the axial force and deformation of pile group foundation meet true response better after fusion.
Model Testing for Two Sides Vertical Anchored High Road Dyke of Reinforced Backfilled Retailing Wall
Authors: Dou Bin , Xiao Chao Chao , Gao Hui
Published: September 2013

The aim of this research is to better understand the behavior of reinforced structures of two sides vertical anchored block backfill reinforced retaining wall. A vertical model retaining wall, 3m high and 5m long, which was constructed by reinforced backfill using two sides vertical anchored blocks. The results showed that the maximum lateral wall displacements increased almost in the middle of the wall height with a maximum value above the wall base. The measured earth pressures showed that the horizontal earth pressures exerted on the wall facing are greater than those inferred from the Rankine active state up the 1/3H of the wall and are lesser than those inferred from the Rankine active state under the1/3h of the wall. The measured and the calculated displacements of wall show very encouraging agreement although the deformation was slightly over predicted at the top and bottom of the wall.
Dynamic Interaction between the Raft-Superstructure and the Saturated Soil under Moving Load
Authors: Chen Xue Jia , Xu Man Qing
Published: September 2013

The purpose of the present work is to investigate the dynamic interaction between plate and structure in a poroelastic half-space produced by moving load using a semi-analytical method. Biots dynamic equations are solved by the Fourier transform technique. The forces and displacements of the superstructure, plate and poroelastic medium at any time are obtained by using the numerical inverse transform technique. Based on the derivation and numerical examples presented above, the following conclusions are drawn: the horizontal displacements and vertical displacements of each floor of the superstructure increase with increasing the velocities of moving load. The vertical displacements in each floor have small change.
Research of the Permafrost Dynamic Load Direct Shear Apparatus
Authors: Cui Ying Hui , Liu Jian Kun , Lv Peng
Published: September 2013

The dynamic parameters of the permafrost are very important for engineering design, also using in the numerical calculation. The dynamic parameters directly affect the correctness of engineering design and numerical simulation. Beijing Jiaotong University developed a novel dynamic load direct shear apparatus to measure these parameters. In the paper, it is analyzed Power systems, measurement and control systems of the dynamic load direct shear apparatus, and gave a verification experiment, the results show that dynamic load direct shear apparatus can complete its purpose.
Preliminary Study on Performance of the Prestressed Concrete Hollow Retaining Pile in Lateral Force Resistance
Authors: Zhang Ru , Yan Ping
Published: September 2013

Prestressed concrete hollow retaining pile in lateral force resistance can effectively increase the bending height because of their hollow, so it can play a good effect in the pit maintenance .We will research and explore some problems about the innovative structure ,such as the suitable value of tension control stress , reasonable calculation method for flexural bearing capacity, shear lag effect causing by the hollow and using finite element analysis to verify. Do some preliminary research on some basic properties of the structure and lay the foundation for follow-up studies.
Study on Dynamic Analysis Methods Verification of Earth-Rock Fill Dam Using Large-Scale Shaking Table Model Test
Authors: Yang Zheng Quan , Liu Xiao Sheng , Wang Xiao Gang , Zhao Jian Ming , Zhang Hai Feng
Published: September 2013

The large-scale models of core rock-fill dam were constructed firstly, and the model dams were vibrated on large shaking table. In this paper, the dynamic analysis methods of earth-rock fill dam were verified base on the results of large-scale shaking model test, including the equivalent linear analysis method base on equivalent linear visco-elastic model and the effective stress analysis method of earth-rock fill dam. Study results show that: the value of natural vibration frequency of model dam which was calculated though characteristic value method using maximum dynamic shear modulus is close to the value which obtained from shaking model test; the acceleration response of the model dam under earthquake were simulated well by the equivalent linear analysis method base on equivalent linear visco-elastic model, and the calculated acceleration response values of model dam are close to the experiment results; because the finite element method (FEM) base on continuum media theory can not well reflect the loosening phenomenon of soil in vibration, the calculated acceleration response values are lower than experiment results; the effective stress analysis method of earth-rock fill dam can consider the dissipation and diffusion of dynamic pore water pressure during earthquake, and the calculated acceleration response values of model dam are close to the experiment results when the reservoir before dam was full of water.
Modeling Design and Finite Element Analysis of the Hydraulic Gradual Transition
Authors: Chen Tao , Zhao Hong Sheng
Published: September 2013

The inlet and outlet of the aqueduct and the inverted siphon, standing a gradual transition linked to the channel, make water gradually change along the cross section of the gradual transition, to improve the water flow pattern. This paper aims to research the deformation of the gradual transition under the water load in static water conditions, to make ANSYS finite element analysis to the engineering gradual transition for preventing deformation, and finally to optimize the overall style design on the basis of its analysis. The developed techniques have been successfully used in designing the gradual transition of a practical aqueduct project. The results of this study on the gradual transition have strong theoretical and practical significance.
The Application of Hydraulic Method to Geotechnical Compression Test
Authors: Yang Dong Peng , Wang Chong , Tong Yin Zheng
Published: September 2013

The geotechnical consolidation test is used to detect the soil deformation under all levels of vertical load. Consolidation parameters play a vital role in the basal design of the buildings. But the lever consolidometer covers too large area, and needs high labor intensity. The pressure consolidometer is not convenient to find leak, noisy, and is affected by the power supply. We developed the hydraulic consolidation system, which is aid to make consolidation tests of the soil samples. The hydraulic consolidation system is composed of the hydraulic pump used as a pressure source, the hydraulic piston cylinder used as the load transfer device, intelligent instrument and solenoid valve. Through the comparison of the test by three methods, it proved that the test results are identical. The coefficient of variation of the parameters is less than 0.1, while its efficiency is 31.33 times higher than the lever test, 6.86 times higher than the pressure method.
Three Dimensional Random Structural Model of Karst Rock and its Application
Authors: Jin Long , Chen Xiang Jun
Published: September 2013

Karst caves determine the engineering characteristics of the whole rock in a large extent. A methed to simulate karst caves is described in this paper. Firstly, three-dimensional mathematic description of the geological mass in which karst caves lies is given. Secondly, the determination of the shape and size of ellipsoids which are adopted to simulate karst caves is introduced in detail. The mathematic modeling of three-dimensional random caves is discussed simultaneously. Thirdly, a real three-dimensional random structural model of karst rock based on actual observation records is provided. Lastly, the above model used for the leakage analysis of the karst rock is discussed. The research results illustrates that the Mathematic model for three-dimensional random caves of karst rock put forward in this paper can be very helpful to leakage analysis on Karst rock.
The Research of Shear Strength and Micro-Structural Characteristics of Acid Pollution Laterite
Authors: Huang Ying , Bo Tong Zhen , Jin Ke Sheng , Zhang Zu Lian
Published: September 2013

With hydrochloric acid as the source of pollution, with laterite as the pollution soil, the shear strength and micro-structural characteristics of acid pollution laterite are studied by direct shear test. The results shown that, the shear strength and microstructure characteristics of acid pollution laterite are affected acid concentration and pollution time. The shear strength and indexes of acid pollution laterite decrease in general with the increase of acid concentration and the extension of the specimen pollution time, the shear strength and indexes exist a minimal value at lower concentration and shorter pollution time, the shear strength and indexes exist a great value at higher concentration and longer pollution time, the corresponding microstructure images present to the characteristics of compactness, roughness, color, texture.
Reliability Analysis Based on Multi Sliding Surface Method
Authors: Cao Yong Hua , Huang Chuan Zhi
Published: September 2013

The reliability theory based analysis is more advanced and reasonable compared with the traditional methods for slope stability analysis. Limit equilibrium method is usually used to evaluate the stability of a slope. In this paper, a new reliability analysis method is obtained based on JC method and multi sliding surface method which a new limit equilibrium method developed by Huang. Then, this new method is applied for a wharf slope. The sliding surface get from the safety factor is not the same as that from reliability index though they are close to each other. The safety factor or reliability index get from Fellenius method is smaller than that from other method. The safety factor or reliability index get from multi sliding surface method is close to that from Bishops method. The reliability index can be more reasonable after the standard deviation of the soil property index is deduced with random field theory.
Stability Analysis on Loess - Mudstone Landslide of the Fenghuang Mountains
Authors: Li Bin , Zhang Wei Hong , Jing Qing Gang , Wang Xin Hong , Cao Rong Tai
Published: September 2013

Loess is widely distributed in the eastern part of Qinghai Province, because of its special nature,a large number of high and steep slopes have been formed in this area, sliding under the influence of human and natural factors,leading to economic losses. Fenghuang Mountain landslide is located in the middle district of Xining City, a the loess-mudstone contact surface landslide with its upper loess bedding sliding along mudstone contact surface. Based on the sliding mechanism, strength reduction method for slope stability analysis has been applied, showing the landslide is in the creeping stage, with the critical safety factor of 1.3 and had better taking the corresponding control measures.
Application of Geophysical Exploration Results in Prospecting Prediction at Xiayingfang Silver Polymetallic Deposit in Chengde, Hebei Province
Authors: Ni Chun Zhong , Wang Dong
Published: September 2013

Xiayingfang mining area in the structure of the earth is part of north China platform of Inner Mongolia axis and yanshan fold belt, which belong to the northern margin of north China platform polymetallic metallogenic belt. Give priority to with silver polymetallic minerals, in the area are mainly distributed at Xiayingfang - Dongshan fault belt and its two side. Ore bodies occur mainly in group a bar at the bottom of the Tuanshanzi group banded dolomite and dolomitic limestone. After analyzing the characteristics of geophysical prospecting in the area, combined with the study of geological conditions, it is good for further prospecting.
The Wing Crack Growth Processes of Rock Induced by Hydraulic Pressure
Authors: Tang Shi Bin , Liang Zheng Zhao , Li Hong , Tang Chu Nan
Published: September 2013

The pre-existing fractures in rock can close, open and growth as it subjected to mechanical or environment loading, which can in turn change the structure of the rock and alter its fluid flow properties. In order to study the crack growth processes of pre-existing fracture in rock under the condition of hydraulic and mechanical coupling, a numerical tool, named F-RFPA2D which takes into account the growth of existing fractures and the formation of new fractures, is used for this purpose. By considering the effect of hydraulic pressure filling into the wing crack, the behavior of fluid flow, damage evolution and their coupling action in the pre-existing and the newly formed fractures are studied in detail. The modeling results suggest that the hydraulic pressure in the crack enhanced the tensile stresses at the crack tips, resulting in crack growth path is different from that without hydraulic pressure loading. The wing crack growth mechanism under the coupling of hydraulic and mechanical is discussed, which provides a good reference for studying on the hydraulic fracturing in rock masses.
Stability Analysis of Dangerous Rocks on the Slope of a Hydropower Station
Authors: Li Hai Feng , Zhang Guo Xin , Huang Tao , Zhou Qiu Jing
Published: September 2013

Dangerous rocks are among the most significant factors in analyzing the stability of high slopes, and are the main geological hazards on such slopes. These rocks are typical spatial blocks. The unstable failure of dangerous rocks poses evident spatial features. Consequently, their stability should be calculated by considering it as a three-dimensional (3-D) problem. In this research, the general block method of fractured rock mass and 3-D discontinuous deformation analysis (DDA) are used to study the stability of dangerous rocks on the slope of a hydropower station. The general block method of fractured rock mass is used to generate dangerous rocks and to assess the geometric mobility of blocks. The progressive unstable failure of dangerous rocks is also analyzed. Moreover, 3-D DDA is implemented to examine the stability of dangerous rocks, including the regularity of their unstable failure. The failure sequence of each batch of blocks estimated by general block theory is the same as that in the results of 3-D DDA. The decrease in the shear parameters of the structural plane shortens the time interval of failures, but increases the number and capacity of blocks.
Reliability-Based Assessment of Flexural Strength of High-Speed Rail PC Box Beam in Marine Environment
Authors: Lu Zhao Hui , Li Hai , Zhao Yan Gang
Published: September 2013

This paper examines the effect of pitting corrosion of prestressing steel strands on flexural strength of prestressed concrete (PC) beams in marine environment. A reliability-based methodology for the prediction of time to structural failure after corrosion initiation was proposed and probabilities of failure are evaluated using FORM as exampled by a high-speed rail PC box beam. The methodology presented in this paper can be used as a tool for structural engineers and asset managers to assess a corrosion-affected concrete infrastructure and make decisions with regard to its maintenance and rehabilitation.
Experimental Studies on the Mechanical Performances of Corroded Reinforced Concrete Columns Retrofitted with FRP
Authors: Zhou Ying Wu , Wu Ling Yi , Sui Li Li , Xing Feng
Published: September 2013

Due to the superiority of high corrosion resistance of FRP materials, more and more attentions have been attracted to the retrofitting of corroded reinforced concrete (RC) columns with FRP. This paper thus presents an experimental study on mechanical performances of corroded RC columns strengthened with FRP, focusing on the effects of different corrosion rates of the reinforcements and the retrofitting scheme. The effectiveness of externally bonded FRP to the corroded RC column to increase its load capacity and ductility is tested; the mechanical performances of the strengthened columns are theoretically investigated. The results indicate that the effectiveness of retrofitting the existing corroded RC columns with FRP jackets is much more significant than that of retrofitting the newly built columns with FRP jackets and externally wrapped with FRP jackets is much more effective to improving the structural performances of heavily corroded columns.
Applications of Drainage Consolidation Techniques Reinforcing the Foundation of Hydraulic Mud Fill
Authors: Yao Shi Hong , Chen Ping Shan , Dong Zhi Liang
Published: September 2013

In recent years, using the hydraulic mud fill to carry out the reclamation construction actions has been an acceptable way to settle the contradiction between the scanty lands with the rapid industrial development in coastal regions. How to improve the ultra-soft foundation made of fresh hydraulic mud fill efficiently has been the crucial issue. This paper presents three reinforcement techniques in reclamation projects, and the applications are briefly introduced.
The Analysis Research of Structure on One and Multi-Stages Molding Method
Authors: Yang Wei Jun , Li Yao
Published: September 2013

t is concluded the influence law of forming final value compared with design value by using one and multi-stages molding to analysis three kinds of different structure. It is shown that the hybrid structure system of concrete structure and steel structure can coordinate both force performance and make it is more consistent with design value.
Large Deformation Analysis of Buried Pipeline
Authors: Wang Ren Zuo , Chen Shih Hung , Huang Chao Hsun , Lin Bing Chang , Wang Chung Yue
Published: September 2013

In this paper, a set of the procedures of the numerical simulation for the buried pipeline is proposed. These numerical procedures are used to compute the large deformations of the buried pipeline through the fault. In order to simulate the fault slip, displacement control is adopted. The geometric and material nonlinearity of buried pipe are considered. The beam elements are used to calculate the buckling deformation of the pipe. The ASCE (1984) soil spring models (SSM) are used to model the interaction of deformation of the soil and the buried pipe. In order to confirm rationality of numerical results using SSM, comparison between experiment result in Cornell University (CU) [5], Trautmann and ORourke experiment results [7] and SSM numerical results are studied. Two examples demonstrate the accuracy of the proposed procedures.
Analysis of Wind-Induced Vibration Response on a Tower Consisted of Steel Tubes and Angel Steels
Authors: Ju Yan Zhong , Zhang Xiao Lei
Published: September 2013

tower consisted of steel tubes and angel steels has equal advantages which steel tube tower has and not easy to happen some bar breeze vibration,but but the wind vibration response for such transmission tower structure research is less. In the engineering background of a tower consisted of steel tubes and angel steels , set up the finite element model for transmission towers. Using Kaimal spectrum for numerical simulation of wind velocity time history. Of 90 ° Angle of wind direction wind to dynamic response are analyzed, the results show that for the displacement, the maximum of dynamic analysis results 88% larger than the result of the average wind, 53.7% larger than standard wind load static result; For axial force, the maximum of dynamic analysis results 147% larger than average the result of the wind, 108% larger than standard wind load static result. So in view of the transmission tower structure dynamic response analysis should be more precise.
Out-of-Plane Stability Analysis of I-Section Steel Arch
Authors: Xi Kuan Tang , Li Jin , Zhou Tie Gang , Lin Tao
Published: September 2013

Finite element model which can reflect the effects of different loading positions were constructed with Beam 188. Effects of different restraints, load models and rise-span ratios on out-of-plane buckling were studied by comparing results of fixed arches with that of pin-end arches under three loading models. It is conservative to design by employing results of radial loading. For ideal restraints, out-of-plane stability of pin-end arches is better than fixed arches when rise-span ratio is big. Effects of different loading positions on out-of-plane buckling were studied. Buckling loads of arches which are loaded at arch-axises are bigger than those of top flanges, but smaller than those of bottom flanges.
Analytical Solution for One-Dimensional Consolidation of Soil Layer Induced by Time-Dependent Groundwater Drawdown
Authors: Yao Jian Feng , Xie Kang He , Huang Da Zhong
Published: September 2013

The governing equation was formulated for one-dimensional consolidation of the soil layer induced by time-dependent groundwater drawdown. Using Duhamel's theorem and method of separation of variables, analytical solutions were developed for the problem. Based on the solutions, the consolidation behaviors of the soil layer were studied and the factors influencing the consolidation were investigated. The results show that it is necessary to consider both the changes of total stress and pore water pressure on the boundary. The greater initial time factor Tvc is, the slower the rate of the consolidation is.
Experimental Study of the Carbon FRP Retrofitted Reinforced Concrete Panels under Explosion
Authors: Sun Wen Bin , Zhu Qiang Qiang , He Wei Zhong
Published: September 2013

Explosions, such as a bomb explosion and a gas explosion, can cause catastrophic damage on the buildings. In fact, an explosion may result in large dynamic loads, greater than the original design loads, of many structures. Two RC specimens were tested under explosive loading. The first specimen was used as a control for the experiment, while the other was retrofitted with 6 near surface mounted (NSM) Carbon FRP strips on each face. Both specimens were subjected to a 60g Pentolite at stand off distances of 0.6m. The aim of this experiment was to observe and compare the behavior of the two specimens, and their ability to resist blast loads respectively. Of particular interest was the response of the retrofitted RC specimens NSM Carbon FRP. The experimental results showed that NSM retrofitting with Carbon FRP is an effective way to provide extra strength when retrofitting against blast loading.
Study on the Sensitivity Factors Affecting the Anti-Seismic Performances of Steel Reinforced High-Strength Concrete Columns
Authors: Li Yun Yun , Yang Bao Sheng
Published: September 2013

Through the experimental tests on 6 steel reinforced high-strength concrete columns under low cyclic horizontal loads, the influence on anti-seismic performance of the columns under different axial compression ratio, stirrup ratio and steel form is analyzed, and that anti-seismic performance of the columns is affected not only by axial compression ratio, but also by steel form. For steel reinforced high-strength concrete columns with different steel forms, the limit values of axial compression ratio may be adjusted, while the influence of stirrup ratio is not prominent.
Optimization of Top Steel-Tube Truss Construction Platform of Silo and Fitting of Curve Equation
Authors: Zhao Hai Long , Wang Wen Xing , Wang Tie Cheng , Li Qin Shan
Published: September 2013

The influence of length of chord and depth of truss on displacement and bearing capacity of truss construction platform was evaluated based on the results of the finite element analysis on eight different diameters of the top steel-tube truss construction platform of silo. The bearing capacity increases with increasing of depth of truss. The bearing capacity increases with decreasing of length of chord. The maximal displacement increases with increasing of the diameter in the same joint loads, and the displacement curve of model fits better.
Force Behavior of Outer Annular-Stiffener Type Steel Castellated Beam-Concrete Filled Steel Tuber
Authors: Li Ming , Liu Yong , Yuan He
Published: September 2013

The force behavior of outer annular-stiffener type steel castellated beam (OATSCB) - concrete filled steel tube (CFST) is analyzed, and the feasibility of this kind of join is discussed. The loading process of the joint is simulated by using finite element software. By analyzing the hysteretic loops, skeleton curves, energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient, the bearing capacity and seismic performance of this type of joint is studied. Before simulation, the validity of the simulation method is verified by using the previous experiment data of outer annular-stiffener type steel beam (OATSB) - CFST. It shows that the results from the finite element simulation method and the experiment are similar to each other, and the hysteretic loops is plump , the energy dissipation coefficient, equivalent viscous damping coefficient and ductility coefficient of this type of joint are high. It can be seen that this type of joint has good mechanical properties, and is easy to realize the yield mechanism of strong column weak beam.
Study on Dynamic Response of Jacket Structure during Floating Transportation
Authors: Jiang Bing , Huang Xuan Jun
Published: September 2013

Through the physical model test research on the dynamic response of jacket structure during floating transportation, the state of motion and the cable towing force under different wave conditions are given. The study results not only the scientific basis for the jacket structure construction, but also can be regarded as the relevant technical reserves of the jacket structure for deep-water offshore wharf construction in our country.
Meso-Mechanical Behavior of Sand under Shear Loading Test Research
Authors: Chen Fan Xiu , Zhang Hui Xin , Kong Liang , Li Jie
Published: September 2013

A continuous deformation measurement system of two dimensional granular materials displacement based on digital image correlation method (DIC) has been build up. Direct shear tests have been performed on standard sand in a special laboratory apparatus with different vertical pressure. Using DIC a pairs of consecutive photographs taken during the tests has enabled fields of displacement velocity and strain to be determined. Assumed the proportional of stress and strain, the direct observation of displacements and principle strains has been possible for a series of force of grains under shear at various stages in the direct shear test.
Simple Computing Method for Tension Cable in Monolayer Cable Net Curtain Wall
Authors: Yang Qing Nian , Wang Fu Zhou
Published: September 2013

The structure design of the tension cable in monolayer cable net curtain wall is very important. Generally the diameter and initial pre-tension of the tension cable is identified via iterative computing in the past works. This paper proposes a simple computing method for this case, which not only quickly computes the maximal internal force of the tension cable by the known deflection limit and identify the diameter of the tension cable, but also deduces the initial pre-tension of the tension cable and assist engineers to analyze and calibrate the tension cable and guide field tension construction.
The Building Protruding Ministry Wind Stimulated Effect
Authors: Tong Zhi Neng , Huang Ying
Published: September 2013

The high-rise building body structures protruding parts stiffness can happen easily wind shock severe vibration under wind loads, effect whip sheath. From the principle of coupled vibration, wind-excited response formula to deduce the protruding portion of the building, the preparation whip sheath effect coefficient condensed reference table for engineering.
Analysis of Effect of Crack in Composite Beam on Slip of Shear Connectors
Authors: He Wan Heng , Gu Qing Hua , Ma Ying Chen , Ni Xin Hua , Meng Xiang Feng
Published: September 2013

Composite beam takes full advantage of mechanical properties of brittle and ductile materials elements. The key point is to rely on the shear connectors ensure overall coordination of composite beam, so as to achieve the effect of flexural component. The crack in composite beam caused by brittle materials elements is not negligible. We obtained the slip of shear connectors with the second order precision under the conditions that there are cracks in the brittle material elements, and the ultimate moment is obtained too.
A Study on the Formulas of Effective Slenderness Ratio of Three-Leg Laced Lattice Column
Authors: Dai Su Juan , Yang Lin , Jia You Hu
Published: September 2013

The formulas of effective slenderness ratio of three-leg laced lattice column are given in the Design Specification of Steel Structure (GB50017-2003). Because the expressions of them are related with the sectional area of the column and the lacing bar, and the angle between the lateral lacing bar and theaxis etc, its used complicated. This article applied knowledge of structural mechanics to analyze the calculation process and result of three-leg laced lattice column and deduce more simple formulas. It is proved through practical examples that both simplification formulas and the Design Specification (GB50017-2003) formulas had a similar result, which provided reference to engineers.
Optimization Design of Section for Bisymmetric Built-Up Steel H-Shaped Beams
Authors: Dai Su Juan , Meng Yan Chun
Published: September 2013

Built-up steel H-shaped beam with variable cross-section design can save steel and realize the economy requirements of structure.The existing design method of variable width of flange of steel beam is only applicable to beam under uniformly distributed load.This paper presents optimization design procedures of the Variable cross-section.The related formulas used to optimization design of section for bisymmetric built-up steel H-shaped beams under concentrated load were derived,and the position of varying cross section of beams under concentrated load was calculated ,it is convenient to be used in engineering design,and provides theoretical foundation for variable cross-section design .
Research on Bearing Capacity of Axiallycompressed Short Columns
Authors: Yin Ying Zi , Zhang Yan , Zhao Gen Tian
Published: September 2013

Abstract: Steel reinforced concrete structure (SRC) is commonly used in high building, but the research on properties of steel reinforced high strength concrete structure (HSRC) composed of high strength concrete and steel reinforced concrete is rarely carried out. In this paper, a series of problems in HSRC structure application is studied, including the steel radio, the stirrup ratio. The conclusions can be served for design specification of steel reinforced high strength concrete column
The Analysis of Bending Performance on the Nodes of Concrete Filled Steel Tubular Column and Girderless Floor under Horizontal Load
Authors: Wang Yu Liang , Ma Li Jie , Zhao Jia Mei
Published: September 2013

The bending moment changes of slab column nodes in the structure system are analyzed by applying horizontal load to concrete filled steel tubular column and girderless floor, and the experimental values and the theoretical calculation values are compared and analyzed.According to the consequence of comparison and analysis, the ratio of the test value and the theoretical value of the bending moment at the bottom of the plate of concrete filled steel tubular column ranges from 8% to 17%,and the average of the ratio is 13%, and the deformability of the node is better than the ordinary slab column node of concrete filled steel tubular column.
Mechanical Study on Short Timber Columns Reinforced by Different Methods of FRP under Axial Compression
Authors: Liang Wei , Dong Jiang Feng , Wang Qingyuan
Published: September 2013

In this paper, the effect of different enwrapping methods on the mechanical behaviour of short timber columns were presented and analysed.Five timber columns reinforced by CFRP and AFRP with two enwrapping forms (hoop and spiral) were tested under the axial compressive.The failure mechanism of specimens, the load-displacement relationship and the load-strain relationship were analyzed. Test results showed that the reinforcement with FRP can obviously improve the compressive bearing capacity of the columns and the highest improve ratio is 57.5%. The compressive stress of specimens reinfoced with hooped FRP sheets is much higher than the ones with spiral method. And the lateral deformations of reinforced specimen is greatly constrained by FRP. In addition, the knags of the wood will affect the mechanical behavior of columns on a large extent.