bluuebunny/crossref_metadata_2025 huggingface dataset:
Static Performance of Reinforced Concrete U-Shaped Composite Beams Subjected to Positive Moment
Authors: Xue Wei Chen , Zhang Bin , Wang Yi
Published: October 2011

The reinforced concrete U-shaped composite beam which is composed of precast U-shaped beam, precast slabs and cast-in-place (CIP) concrete, is investigated in this paper. The performance of the reinforced concrete U-shaped composite beam and the cast-in-place concrete control specimen subjected to positive moment was evaluated in terms of failure pattern, flexural strength of normal section, ductility and slips based on the monotonic static loading tests. The results showed that both specimens behaved in ductile manner. The flexural strength of reinforced concrete U-shaped composite beam was about 11% lower than that of the control specimen. The displacement ductility and curvature ductility of the precast specimen were about 33% and 18% lower than those of corresponding control specimen, respectively. The slip between precast beam and precast slab and the slip between precast slab and CIP concrete were less than 0.16mm and 0.17mm, respectively. The results in this paper are useful to expand the application of reinforced concrete U-shaped composite beam in the field of civil engineering.
Design Analysis of the Gorilla Building in Zoos
Authors: Fu Jian , Zhang Jun Jie , Li Yu Ge , Li Yao Jie , Xu Zi Shuai , Tang Ke Dong
Published: October 2011

The paper analyzes the design characteristics of the gorilla building from the aspects of design concept, plane design, space design and detail design etc. and elaborates the thinking process of design according to the actual conditions such as city space, field, use requirement , function relations, technique design and so on.
Indoor Thermal Environment Test and Investigation Analysis—Based on Newly-Built Residential Houses in Daping Village, Sichuan Province
Authors: Cheng Hui , Liu Jia Ping , Liu Da Long , Tang Fang Wei , An Yun Gang
Published: October 2011

Based on the recognition of original defective residential housing environment in Daping village, constructional measures were improved and updated. Objective test and subjective investigation on indoor thermal comfort were carried out and analyzed in the typically new and old residential houses to propose measures for further improvements. This paper aims to summarize experience and deficiencies in aspects of indoor thermal environment design and to provide reference to building design after disasters in future.
A Case Study of Integrated and Human-Oriented Sustainable Architectural Design
Authors: Peng Hu , Liu Yu , Zhang Ying Le , Tan Meng Qi , Gan Chao
Published: October 2011

In recent years, sustainable building has been attracting increasingly more interests and attention in the world; as the same time, it is experiencing a high-speed progress and many landmark buildings have been built as green, ecological or sustainable buildings. In China, designers, professors and students in the architecture realm are encouraged to get involved in sustainable architecture design practically/theoretically. With this background this paper presents a case study of a sustainable architectural design, which contains concepts and ideas of integrated sustainable architectural design and a human-oriented “User’s Manual” based on a sustainable architectural information system, hoping to induce more profound discussions in the sustainable architectural design area.
Integrating Passive Cooling and Solar Techniques into the Existing Building in South China
Authors: Liu Yi Wei , Feng Wei
Published: October 2011

This paper draws upon passive cooling and passive solar techniques to integrate them into a common multi-purpose building in South China so as to optimize the indoor thermal environment and reduce building energy consumption. Meanwhile, it also discusses how to combine architecture design and sustainable techniques reasonably. In order to prove that these sustainable design options are effective, CFD, Ecotect and Solpass software should be used to simulate or calculate the heating and cooling loads, discomfort hours for both of the existing and advanced building. Though comparison it is obviously that the indoor discomfort hours decrease by nearly one third by passive cooling system, while passive solar techniques can reduce 25% annual heating loads.
Stability and Dynamic Analysis of the Spatial Helical Irregular Steel Sculpture
Authors: Chen Zhi Hua , Yan Ren Zhang , Yan Xiang Yu , Yu Jing Hai
Published: October 2011

As the shape of the spatial helical irregular steel sculpture is singularly, this paper studies the structure’s stability and dynamic properties with finite element analysis software in order to determine its ultimate bearing capacity, The structure’s natural vibration characteristics are obtained by modal analysis. The structure’s deformation characteristics within a small time history is also obtained by transient dynamic analysis. Feasibility of the new irregular steel structure is verified by calculation and analysis in this article which can lay the foundation for the development of the irregular steel structure.
Study on the Maximum Installed Capacity of Surface Water Source Heat Pump System
Authors: Feng Jin Mei , Gao Jian Min , Woods Paul
Published: October 2011

The maximum installed capacity mathematic model has been set up and analysis about surface water source heat pump using at large scale. The maximum installed capacity of Nu River China has been calculated by the equations as an example. In the mean time, the key coefficients have been simplified while practical application in engineering. A general conclusion of the maximum water source heat pump installed capacity has obtained for different surface water characteristic. The value from the general conclusion can use in the plan and the layout on the surface water source heat pump system large-scale use. That will protect ecological environment and against creates the destruction.
The Settlement Analysis of Raft Foundation Using RFDG Program Based on ANSYS
Authors: Li Ming , Liang Li , Li Xin
Published: October 2011

The development of raft foundation design guide (RFDG) used in the high-rise building was programmed based on the secondary development language of ANSYS, such as TCL/TK, APDL and UDIL. The RFDG program provides a friendly GUI, which can be used expediently for the numerical experiment. The settlement analysis of raft foundation in the case study was carried out by RFDG. At the same time, the main technique for the secondary development of ANSYS has also been discussed in this paper.
Model Test and Structural Behavior Analysis for Cable-Pylon Anchorage Zone of Cable-Stayed Bridge
Authors: Fang Chang Yu , Zhang Yao Ting
Published: October 2011

In long-span cable-stay bridges, anchorage zone of cable-pylon is a key part to transfer cable force to pylon. Because of local concentrated force, irregular pylon section and complicated construction measures, a general mechanical analysis is unable to reflect actual stress distribution and working performance of anchorage zone. Based on Maling River Bridge in Guizhou province, China, clear finite element analysis and reliable full-scale model test for cable-pylon anchorage zone segment were carried out. Not only were design of model test and loading program introduced, but also test content and sensor arrangement were documented. In addition, details of finite element modeling were involved too, such as mesh generation, boundary condition and loading cases. Through comparison and analysis of stress increment and crack observation, the location where larger local tensile stress occurred was obtained. Corresponding anti-cracking load coefficient and safety coefficient of crack width were also presented. Parts of research findings have been used for the guidance of bridge construction.
Experimental Study on Concrete-Filled Steel Tubular with External Octagon Steel Tube and Inner Circle PVC-U Pipe under Axial Compression
Authors: Yuan Wei Bin , Ma Shi Long
Published: October 2011

An investigation of the octagon-shaped concrete-filled double skin steel tubular columns which used PVC-U pipe to replace the steel tube as inner tube was carried out. In order to study the performances and mechanisms of the components when suffered axial load, ultimate axial bearing capacities of 9 components were tested. The cross-sectional size of the outer steel tube and inner PVC-U pipe and length of the specimen was concerned by the nominal steel ratio and the hollow ratio and slenderness ratio, respectively. The external steel tube and core concrete appeared three and four types of destruction phenomenons, respectively, but the inner PVC-U pipe did not destroy. Finally, experimental results and numerical analysis results were comparied.
The Study of Diaphragm Beam Influence to Load Transverse Distribution of T-Beam Bridge
Authors: Gao Guo Hui , Xie Zhen Yu , He Ran , Song Jian Yi
Published: October 2011

Diaphragm beam has grate influence to load transverse distribution factors of T-beam bridge. Two steel T-beam bridge models were made in this article, one have diaphragm beam and the other one have not. Concentrated load was applied to both of them, and mechanical analysis of the T-beam bridge model was carried out by finite element software. Compared with experiment data and theoretical data, it shows that: when the concentrated load was applied to mid-span of 1#,2# and 3# beam of the two kind bridges, the 1#,2# and 3# beam load transverse distribution factors of T-beam bridge without diaphragm beam is larger than that of T-beam bridge with diaphragm beam by 19.3%~23.2%、25.3%~30.6% and 48.1%~50.1% respectively.
Virtual Simulation Technology Application in Complex Spatial Steel Structure
Authors: Xiao Liang Li , Fang Wan Rong , Zheng Ya Wen
Published: October 2011

Building information technology includes production process information technology and management information technology. The first one can improve efficiency and productivity, and the other one can improve the business treatment efficiency and management level. In this paper, combining with the application requirement of building construction, application research on virtual simulation technology is discussed, which is one of the key technologies in the information construction process. Furthermore, by analysis of Guangzhou stadium project, the application of this simulation technology in complex spatial steel structure is introduced in detail.
Analysis of Vertical Response in Suspended Structures Subjected to Vertical Seismic Force
Authors: Nie Zhi Hua
Published: October 2011

In this paper, the series-parallel-connection model with considering joint rotation has been established on the suspended structure which is simplified. The mass matrix has been established using the method of consistent mass, and dynamic matrix of structure is predigest through dynamic force condensing, the vertical stiffness matrix and mass matrix have been obtained. There has been a dynamic characteristics analysis of suspended structure subjected to vertical seismic force with the method of analysis of step-by step integer. From the result some dynamic characters of suspended structure under vertical seismic force have been obtained.
Primary Engineering Geological for Shuibuya Underground Power Station and their Treatment
Authors: Liu Jing Hua , Zhou Jian Jun
Published: October 2011

The Shuibuya hydropower station is located in Badong County in the middle reach of Qingjiang River. It is the first cascaded project in Qingjiang mainstream. The Project consists of a concrete faced rock fill dam (CFRD), underground power house, chute spillway on the left bank, and the sluice tunnel on the right bank. The dam is 233m high, which is the highest of its kind in the world at present. The installed capacity and annual output of Shuibuya Power Plant are 4×460MW and 3.92 GWh respectively. The rock mass of foundation of Shuibuya project is a type of stratified sedimentation rock mass is composed of interbedded stratum by weak layers and hard layers. To solve engineering geological problem is difficult and challenging. For example, the intake slope of Shuibuya hydropower diversion tunnel was a landslide, and diversion tunnel outlet is located at the toe of Maya slope with 360m high, rock mass of the underground powerhouse caverns are soft and hard rock inter-layered, with multi-structural planes, multi-shear zones, and the lithology of rock is highly krast. Some researchs and geological treatments were performed during the geological exploitation and construction, which is fundamental and primary.
Research of Prestressed Concrete Hollow Multi-Ribbed Composite Box Girder
Authors: Hu Ping , Zhao Dong Qi , Li Hui , Song Gui Feng , Tang Yi Jun
Published: October 2011

Base the shortcomings of pre-simple-supported post-continuous girder bridge construction, a new beam-bridge convert structure system is proposed, that is a kind of structure form of prestressed concrete hollow multi-ribbed composite box girders, the calculation method of two phase and noting are put forward. the kind of Cast-in-place assembly structure is light self-weight, force structure reasonable, easy construction, overall good and overall cost low.
Analysis of Base-Isolation Building System
Authors: Ni Guo Wei , Jiang Deng Ling , Qi Jia Rui , Chen Juan Nong
Published: October 2011

In order to improve the effect of isolation structure, the principles and behaviours of the base-isolation system are studied, and the types and characteristics of the base-isolation are also discussed. Compared to the traditional aseismatic structures, the base isolation structures decrease the seismic response obviously: the total structural aseismatic value decrease 1/4-1/32, the seismic shear stress in the upper structure decrease 1/14-1/23. In the huge seism, the structure can have the obvious aseismatic effect.
Analysis on Load Bearing Capacity of Column with Different Diameters of Steel Tube under Horizontal Displacement
Authors: Xu Ya Feng , Zhang Li , Song Jian
Published: October 2011

In order to analyze load bearing capacity of column with different steel tube diameters under horizontal displacement, and provide reference for further study about seismic performance of column which is called CFRP steel reinforced concrete filled with steel tube concrete column, this paper makes the nonlinear finite element analysis on this column by using ABAQUS. The load–displacement curves of the specimens with different steel tube diameters are acquired by establishing model, choosing constitutive relationship, making unit types and mesh settings, and then analyze the influence of different steel tube diameters on load bearing capacity of specimens. The curves show that with the increasing of steel tube diameters, the slope of curves in the elastic stage increases, besides, maximum point of load–displacement curves in the elastic stage is increasing. The results show that only with horizontal displacement, the slope of curves and the bearing capacity in the elastic stage is increasing with the increasing of diameters, it is clearer when the horizontal displacement is small.
Seismic Damage Analysis of Factory Buildings in 2008 Wenchuan Earthquake
Authors: Wang Wei , Guan Hai Tao
Published: October 2011

Based on the damage field survey of the industrial building in Wenchuan earthquake, the typical building seismic damage characteristics of industrial structures were summarized and analyzed. According to the damage phenomenon, the following conclusions are derived: usually, the main structures of industrial buildings received serious damage, which roof system were distorted and collapse, bent-frame column were pressed and yielded, bracing system were tension broken or pressed and yielded; when the main structures of industrial building received minor damage, the non-structural member regular suffered relatively damage, include the end bays in the longitudinal direction, high gables, the cantilevered walls between two span with different height and the foundation. Then damage rules and reasons are summed up and damage characteristics and the corresponding design and retrofitting suggestion are proposed. At the end of the paper, it was indicated that seismic design of major structure and non-structural members of factory building must be fully complied with the Seismic Design Code, seismic assessment and seismic strengthening should be carried out at regular intervals for the existed industrial building, which served a long time and whose fortification level is unsatisfied with requirement.
MODEL Test and Study of Vertical Loading Single Pile in Transversely Isotropy Clay
Authors: Zhu Zan Cheng , Jiang Feng Hua , Wang Xiao Gang
Published: October 2011

According to the basic idea of similarity theory, the pile model in saturated transverse isotropic clay is determined. It imitates the moment of different positions along the pile and acceleration of each test point on the soil surface, under the same largest exciting force with different frequencies on the top of the pile. The results of experiment show that the variation trends of the moment are the same for different frequencies of excitation, looking like an inverse S. Acceleration value of each test point on the soil surface decreases with decline of the exciting frequency.
The Reliability Research of Steel Plate Shear Wall Based on APDL
Authors: Huang Hui Rong , Zhu Yi Jie , Guo Jia Yuan , Feng Xiao Yuan
Published: October 2011

Abstract: The models of un-stiffened, cross stiffened and diagonal stiffened are established by the APDL language of ANSYS, then their reliabilities of stochastic finite element are researched. The result shows that, under the equal seismic forces, the reliability of the three models from childhood in order as is the un-stiffened, the cross stiffened and the diagonal stiffened. And the vertical pressure is the most effective factor toward the three models. Recently years, the study about the steel plate shear wall at home and abroad is almost the research [1,2] of experience and hysteretic performance by the theory combined with experiences. Xianzeng Li [3], who discussed the feasibility of thin steel plate shear wall which is used in the seismic area, studied the stress structure feature and seismic feature of the thin steel plate shear wall under the drab and cyclic loads by finite element. The shear performance under one-way load and the hysteretic performance of the diagonal stiffened were researched deeply by Chunhua Cao [4,5], and the result shows that it’s an excellent part of resisting lateral force with full stability lag circle and high security reserve. In this text, the analysis about the reliability of steel plate spear wall is completed.
Overall Stability of Open Cold-Formed Thin-Walled Steel Members with Hat Sections and Batten Plates under Axial Loads
Authors: Sun De Fa
Published: October 2011

Batten plates can play a significant role in reducing the bearing capacity of the entire component and preventing the upward warpage deformation in the opening section. The specific number of batten plates should be calculated for the open cold-formed thin-walled steel structure. By theoretical analysis, this study develops the flexural-torsional buckling formula for the open hat-section cold-formed thin-walled axially compressed members with batten plates. The calculating results show that, according to the configuration rule with 40 iy space between batten plates along the opening direction in the open thin-walled steel members, the warpage deformation will be effectively prevented in the opening direction. Besides, the bearing capacity of the entire member will be increased. The proposed calculation methods can actively complement the existing code.
Basic on Ansys to Study Frame Beam Supported one on Beam and the other on Column
Authors: Song Feng , Wang Shao Jie
Published: October 2011

Using finite element software ANSYS to do quasi-static numerical analysis for frame beam which supportted both in beam and columns. Analysis of simulation comes to a dangerous section of the frame beam position, and comes to the general rules of beam damage. The results showed that: dangerous section in columns end, and the end of the main and secondary girder are more safer;Board has a great contribution to improve the bearing capacity, especially for Beam-column nodes,at the same time the steel of plate surface which in beam and plate bottom which in columns have a great contribution to improve the capacity of the beam bending.
Experimental Study of Post-Fire Bearing Capacity of a Profiled Sheet-Lightweight Aggregate Concrete Composite Floor
Authors: Sun Ping Xin , Wang Xin Tang , Sun Hong Liang
Published: October 2011

In order to study the post-fire bearing capacity and performance of the profiled sheet-light aggregate concrete composite floor after exposure to fire load, experimental study of post-fire bearing capacity of a profiled sheet-ceramsite concrete composite floor subjected to dead load, which has no shearing nails, is carried out here. Based on the experimental results, the post-fire bearing capacity of the composite floor after exposure to fire is analyzed. It is shown that the failure form of the profiled sheet-lightweight concrete composite floor after exposure to fire has obvious change compared with the floor not subjected to fire load, and the ultimate value of the equivalent distributed load applied to the top surface of the floor is up to 35 kN/m2, which may be used as basis of strengthening and repairing of the profiled sheet-lightweight aggregate concrete composite floor after exposure to fire.
Random Earthquake Response Analysis of Eccentric Structure with Base Isolation
Authors: Wang A Ping , Chang Peng , Zhang Peng
Published: October 2011

To study dynamic response law when the isolated structure eccentric, random vibration of eccentric isolation structure is analyzed by generalized frequency response function in different structural parameter and site conditions, soil conditions, and isolation layer use the equivalent linear model, the structure level-torsion coupled vibration characteristics are considered. By calculation, statistical law of structure random dynamic response of eccentric isolation structure under seismic waves is given.
Analysis of Deformation for PC Thin-Wall Box Girders Exposed to Fire
Authors: Hou Wei , He Shuan Hai , Wang Cui Juan , Zhang Gang
Published: October 2011

Being aimed to deformation problem of pre-stressed concrete thin-walled multi-room box girders exposed to co-action of fire and load, on the basis of enthalpy conduction model and thermo-mechanics parameters, the finite element procedure was applied to analyze the deformation of three spans pre-stressed concrete thin-walled multi-room box girders exposed to co-action of fire and load. In conclusion, the deflection is obvious under action of the variation width and fire load model.
Calculation on Crack Resistance Capacity of Abnormal Interior Joints in Reinforced Concrete Frame Structures
Authors: Lv Dong Yang , Li Ning , Zhai Ren Zhe
Published: October 2011

Six specimens of abnormal interior joints were tested under reversed cyclic loading. Experimental studies were carried out to investigate the influence of joint core dimensions and axial compression ratio on crack resistance of abnormal joints. The results showed that the crack resistance capacity was mainly provided by the minor core concrete (determined by the top column and the small beam) , and the minor core concrete was in elastic stage before cracks appeared. Furthermore, axial compression ratio was a significant parameter to increase the crack resistance capacity. Based on the test results, a theoretical formula of crack resistance capacity was proposed. The calculated crack resistance capacities of 11 abnormal interior joints were compared with the experimental results, and a good agreement was obtained.
Influence of Soil-Pile Interaction on Seismic Mitigation Effectiveness with FPB for Curved Girder Bridge
Authors: Qi Xing Jun , Chen Shu Gang
Published: October 2011

The seismic response of curved girder bridge is more complex because of its irregular plane shape. Friction pendulum bearing (FPB) has a positive effect on structural seismic response. The seismic response mitigation effectiveness of FPB to curved girder bridge with soil-pile interaction considered is needed to research. The three-dimensional calculation model of a curved continuous girder bridge is established, and FPB are added at the positions of sliding bearings with soil-pile interaction. The influence of soil-pile interaction on seismic response mitigation effectiveness of FPB is computed and analyzed under three-dimensional ground motion action. The results show that the seismic response mitigation effectiveness of FPB is quite obvious with or without soil-pile interaction considered. Furthermore, seismic response mitigation effectiveness of FPB increases for the internal force of piers after soil-pile interaction considered. FPB has great and positive mitigation effectiveness on the seismic longitudinal displacement of the main girder of curved girder bridge, but with soil-pile interaction considered the mitigation effectiveness decreases a bit.
Seismic Response Analysis of Large Liquid Storage Tank Considering Fluid-Structure Interaction
Authors: Zhang Ling Xin , Tan Xiao Jing , Liu Jie Ping , Zhong Jiang Rong
Published: October 2011

To large liquid storage tank, based on the potential flow theory, considering fluid-structure interaction, the potential-based elements and the shell elements are used to simulate the liquid and the tank, respectively. Using the displacement-velocity potential finite element method formulas, the seismic response analysis method of the liquid storage tank is obtained, and is implemented based on the ADINA program. Some useful conclusions of the tanks under the earthquake loadings are obtained through two examples, which provide the reference for the seismic design theory and the seismic performance, and provide the analysis approach for the damage behavior and loss assessment of liquid storage tank.
Probability Model of Beijing Residentials’ Fire Load
Authors: Liu Yan Chao , Liu Dong Dong , Wang Jin Ping , Chen Wei Hong , Zhao Bin
Published: October 2011

We analyses 418 of fire load data of Beijing residential in city subdivision and suburban district which collected by Beijing University of Civil Engineering and Architecture and Institute of Building Fire Research. Suppose the probability density function of several fire load, using maximum likelihood estimation method to obtain the parameters, and use the K-S test examine the probability density function model, the final selections of Generalized extreme value distribution and Log logistic fit better as a Beijing residential fire load distribution probability distribution models. Finally using these models, according to the JCSS rules, the fire load standard value of Beijing residential is put forward.
Study on Calculation of Ecological Footprint Model Parameters of Beijing Urban Water Resources
Authors: Ying Li , Guo Ting Ting , Li Pan Pan
Published: October 2011

The conception and study status of ecological footprint of water resource were summarized and the research of two ecological footprint model parameters, ie equilibrium factors and yield factors were analyzed and compared. On this basis, the calculation of ecological footprint model parameters of the Beijing urban water resources, ie balance factor and yield factor were proposed. Water balance factors of Beijing urban water resources and water yield per unit area and water yield factor of Beijing Fangshan, Pinggu, Yanqing were calculated, thus provide reference for appraisal of ecological carrying capacity of Beijing urban water resources.
A Multiple Grid Algorithm for One-Dimensional Flood Flow
Authors: Wei Wen Li , Zhao Xiao Jun , Liu Yu Ling , Liu Ming Qin
Published: October 2011

Numerical modeling of open channel flows with dam-break using explicit finite difference schemes is constrained by the choice of time step, which is limited by the CFL stability criteria. To overcome this limitation, in this work we introduce the application of an algorithm to the field of computational hydraulics. By coupling this algorithm to a second-order accurate MacCormack scheme, we demonstrate that the solution can be accelerated to the desired transient state. The present formulation has been tested to simulate a dam-break flow. The close agreement between the obtained results and the theoretical findings indicates the reliability of the proposed algorithm.
Study on Effect of the Balcony Type Flat Solar Heating Water System on Tall Building Structure
Authors: Cao Ping , Hu Ying
Published: October 2011

The balcony type flat solar heating water system is becoming the first choice of high residential building for it’s high thermal efficiency, simple structure, safety,high building integration and so on. But the main load of this system is large and all on the south balcony, so we need structure analysis. This paper takes YIN CHEN balcony type flat solar as an example, choosing three buildings, respectively with 18, 24 and 34 storeys, applying PKPM--SATWE to analyze the structure. By comparing the results we find this system has minor effect on structure, reinforcement,structure foundation.
Problems and Solutions of Energy-Saving Buildings in China
Authors: Liu Jun Qing
Published: October 2011

With the energy crisis,energy saving becomes a worldwide topic,Construction as the three major energy-consuming industries naturally become the focus of energy conservation. 95% of our existing buildings are high energy consumers, Therefore, the natural energy-saving building become the important work of building energy efficiency. In this paper, through the study of energy-saving status , China proposed a large number of problems about the introduction of EPC as an energy-saving mode in the process of emergence. And makes recommendations for the development of energy companies to adapt to the Chinese market better.
Nitrogen Removal Capacity in Horizon Subsurface Flow and Vertical Flow Constructed Wetland in Relation to Operational Mode
Authors: Xie Tian , She Zong Lian , Shi En , Li Lei Lei , Zhu Ying Jie
Published: October 2011

Two laboratory scale constructed wetlands were designed as horizon subsurface flow constructed wetland (HFCW) and vertical flow constructed wetland (VFCW) and were utilized to study the treatment capacity to reduce nitrogen. According to different inflow concentration and height of water surface, HFCW was analyzed in two operational modes and VFCW in four operational modes. The semi-submerged VFCW had the best capacity to remove nitrogen and the total nitrogen removal rate reached to 92% and the removal rate of HFCW was 90%. Moreover, the un-submerged VFCW could reduce 93% ammonia but nitrate removal rate just was 9%. And the removal rates of NH4+-N, NO3--N and TN respectively were 85%, 80% and 81% in submerged VFCW.
Effects of Modified Gypsum on Autoclaved Products Strength
Authors: Ni Tie Quan , Ke Chang Jun , Yuan Bing
Published: October 2011

The modified tests are put on by selecting gypsum from different habitats, using doping technology and calcination technology. The tests results can be summarized as follows. Different kinds of gypsums have different effects on the strength of fly ash autoclaved products, and so do the gypsums collected from different habitats. Low-purity gypsums helps to improve the strength of autoclaved products. Low-purity scatter of gypsum can be achieved by means of natural doping and artificial doping, and natural doping is better. Calcined gypsum could increase the strength of fly ash products within a certain range, and the best calcining temperature is about 650°C.
Effective Factors on Eco Labeling Building-Construction, Materials and Components
Authors: Amani Nima , Hosseini Seyedmohsen
Published: October 2011

There is need to assess the potential of the construction materials for the green building future generation. Research is necessary for complete assessment of construction materials for present and future generation of green building. This paper provides a consistent basis and specific factors for construction materials based on eco-labeling sciences. Within the methodological framework, three categories of sustainable building materials’ implementation are discussed: economical implementation; environment implementation; and social implementation. The paper shows that green building improvements can be achieved with help of the choice materials based on existing factors of eco-labeling construction. Construction eco-labeling can help to select a suitable material for creating a better outdoor environment and indoor environment of building.
Study on Ceramsite
Authors: Ding Pei Xi , Yin Li Ru
Published: October 2011

Ceramiste, a lightweight aggregate(LWA), has large numbers advantages: high strength, thermal insulation, anti-seismic and so on. The earliest ceramiste development happened in America, and then widely used in the developed countries, all that most used for buildings and bridges. However the ceramsite research was soon after the foundation of the PRC, and quickly developed around the end of the 1970s. Now ceramsite with high strength and high performance has produced all over word. Personally investigating, with the situation of the detailed technological process of clay-ceramisite and pictures, and there are some most important notices among the production. With great performance, ceramiste is widely used in some catagories, such as insulation concrete, great fillers for filtration ponds and planting.
Analysis on the Correlations between Preservatives and the Durability of High Performance Structural Concretes
Authors: Cheng Qi Feng , Wen Bao Lian , Li Mei Dan , Tian Wen Ling , Wang Chun Yang , Li Zheng Zhong , Huang Hui Ming
Published: October 2011

Concrete is the most consumed building material worldwide today, which durability has been paid close attentions for a long time. Currently，the design lifetime of many buildings is over 100 years. At present, many projects adopt preservatives to extend the durability of concrete. the paper makes contrastive studies on mechanical properties, ASTM flux, RCM chloridion diffusion, Permit in situ chloridion permeability, Autoclam water absorption, and freezing & thawing resistance between preservatives-added and non-preservative concretes at different typical strengths; and concludes correlations between the preservatives at different strengths and the durability of concrete, thus to evaluate the influence of various preservatives on the durability of high-performance concrete.
Experimental Investigation on Performance of Fiber Asphalt Mixture
Authors: Han Ju Hong , Guo Jin Jun , Liu Zhong
Published: October 2011

The paper investigates positive effects of three kinds of fibers on the performance of asphalt concrete mixture, which include mineral fiber (Fiberand®), lignin fiber and polyacrylonitrile (Dolanit@AS). The contrast experiments of AC-13 SBS modified asphalt mixture added fibers were carried out. The results reveal that the pavement performance can be improved remarkably if appropriate fibers are added into the asphalt mixture. The method of determining optimum mixture ratio was proposed on the basis of road performance of asphalt concrete. It is more reasonable to adopt comprehensive indicator containing stability and dynamic stability in determination of the optimum mixture ratio of asphalt concrete.
The Effect of Fly Ash and Red Mud Content on the Compressive Strength of Foam Concrete
Authors: Wang Fan , Zhang Yi He , Zhao Tong , Zhang An Zhen
Published: October 2011

A series of foam concrete with different content of fly ash or red mud were experimentally investigated in this study. The results indicated that the water-solids ratio of optimized material proportion and curing conditions were 0.5, and the compressive strength and density of the concrete compressive would fall with the addition of fly ash or red mud.
Analysis of Suspended Structure System with Huge Concrete-Filled Tubular Steel Lattice Column
Authors: Gao Yong Tao , Fu Peng Bin
Published: October 2011

In order to meeting high-rise building anti-wind，anti-seismic and land for construction more angespannter situation of urban construction need, introduced a type of new structure which has advantages of seismic dissipation, a great use of materials with high strength and fewer floor spacing：the suspended structure system with huge concrete-filled tubular steel lattice column. Introduced its main structure form, member type and decorate situation by referenced to high-rise building and involved suspended structure theory，ant same time，we state fundamental way and connecting format to this structure system. So we can realize its design features，meditation and innovation case，lay a foundation for spread this new type of structure popularization and application.
A Review on the Research of Concrete with Expanded Polystyrene Beads as Aggregate
Authors: Chen Rong Lin , Zeng Zhi Xing , Zhou Ke Min
Published: October 2011

This paper is an overview of research about the concrete with expanded polystyrene beads as its aggregate in the past. First, a brief introduction to the expanded polystyrene beads concrete is given. Then, the researches of these years is presented and discussed, and the important studies are described in detail. Finally, the paper gives a summary of the research status and prospects of expanded polystyrene beads concrete.
Study on Performance of Alkali-Activated Flyash-Based Geopolymer Reinforced by Silica Fume and Styrene-Acrylic Emulsion
Authors: Wang Ya Chao , Zhang Yao Jun , Xu Yong , Xu De Long
Published: October 2011

In order to improve the inherent fragility of alkali-activated fly ash-based geopolymer, the silica fume and styrene-acrylic emulsion were used to reinforce and toughen the geopolymer. The phase structure, morphology and chemical composition were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray fluorescence (XRF). The results showed that the mechanical properties of alkali-activated fly ash-based geopolymer were dramaticlly improved and the specimen with doping content of 10 wt% silica fume, 1wt% styrene-acrylic emulsion and 15wt% the alkaline excitation agent Na2SiO39H2O showed the highest compressive and flexural strengths of 42.11MPa and 5.30MPa in the ambient temperature curing 28d, respectively. SEM results indicated that doped silica fume and styrene-acrylic emulsion were embedded within the matrix of fly ash-based geopolymer. XRD results demonstrated that the mineral structures did not change obviously when silica fume and styrene-acrylic emulsion were added to the geopolymer
Study on the Spirit of Place and the Spatial Representation of Traditional Settlement – Taking Shanghai Xinchang Old Town as Example
Authors: Sun Wang Hu , Li Li Sha , Xu Shu Chen
Published: October 2011

This Article focus attention on the regional non-material cultural identity of the cities and towns around the the Yangtze River Delta . Historical and geographical context, rural festival temple fair, the daily living space is the three most representative components. It has great significance to the formation of regional economic, cultural and recreational attributes during the historical period Paper to the Xinchangtown of Nanhui County, take the historical maps of boiling down the wave; theannual festival, field activities, "March 28 Festival Temple Fair,"and traditional local cuisine as the main object of study: First, from thespirit of the idea, industry background and political and cultural backgroundand so, it analysis the impact of the history of formation and evolution of thesalt pan and the impact of salt industry for the spirit of the ancient localpeople, culture and life; Secondly, the elements of field culture arediscussed, then ,the festival market, business, entertainment space areanalyzed; Further attention later in the article section was taken to theinteraction of the field activities and the settlement pattern and itsmanifestations in daily life, which discusses the existence and impact of thelocal market place to the rural section and conduct the basic research for thethe rehabilitation of Festival Temple Fair
Static Experimental Study on Composite Beam with Concrete filled Steel Tubular Truss
Authors: Wang Jing Feng , Wang Bo , Zheng Zhong Ming
Published: October 2011

To research the mechanical behaviour of the novel composite beam with concrete filled steel tubular (CFST) truss, an experimental study of simple composite beam subjected to monotonic loading is described. A test program was developed to investigate failure models and working mechanism of the typed composite structure. Load-deformation curves, deflection regulation, strain distribution of beam were analyzed and asserted. The experimental and analytic results show that the typed composite beam has high strength, excellent ductility, and torsion performance. It can be used the large span bridges and high rise buildings.
Investigation of few Durability Parameters of Phospogypsum Concrete
Authors: Dandge Ajay L. , Meshram Vilas G.
Published: October 2011

Modern concrete is now common to use admixture (chemical or mineral), pozzolana’s for modifying different properties of concrete in fresh and hardened state. This paper presents the salient features of the development of Phosphogypsum(PG) Cement Concrete and discuss the improvements affected in the properties of concrete with the use of PG as an admixture compared to the plain or conventional cement concrete. This was accomplished by an experimental study by preparing different grades of cement concrete mix M20, M25 and M30 using PG as an admixture by replacing 5% of OPC and few durability parameters were investigated. This includes studying the compressive strength, workability, air entrainment and moisture movement by wetting and drying method. Study were conducted for modifying the properties of the concrete, controlling the concrete production cost, to overcome the scarcity of cement, and finally the advantageous disposal of industrial wastes.
Study on Design Method of Warm Mix Asphalt
Authors: Wang Chun , Hao Pei Wen , Li Rui Xia , Zhang Qing
Published: October 2011

The paper studied on the mix design method of two different warm mix asphalt adopted Marshall test and SGC(Superpave Gyratory Conpactor) test, and analysed their differences of high temperature stability, low temperature cracking resistance performance. The results show that, for different types of warm mix asphalt, it should be taken a different test method to design. It was recommended that the design of warm mix asphalt based on surface activity agent should use Marshall method, and warm mix asphalt with the addition of organic agent should use SGC method.
Research on Self-Desiccation at early Age of High Performance Concrete with Polypropylene Fiber
Authors: Yu Wei Wei , Xiong Qing , Yu Yun , Lin Hang
Published: October 2011

This paper focuses on the impact which polypropylene fiber (PF) has on the self-desiccation effect at early age of high performance concrete (HPC). The experimental results indicate that PF has little influence on the Internal Relative Humidity (IRH) caused by self-desiccation effect of concrete, but can reduce early aged self-desiccation shrinkage of concrete. With the PF dosage increasing, the values of early self-desiccation shrinkage of HPC decrease first and then increase. In the experimental conditions, the value of self-desiccation shrinkage of concrete with 0.6Kg/m3 PF is the lowest one.
Effect of Vibrating Mixing on Air Content and Compressive Strength of Concrete
Authors: Zhao Li Jun , Feng Zhong Xu
Published: October 2011

This paper made a study on the effect of different vibrating parameters on the air content and compressive strength of concrete by the test of using the combining method of vibrating and forced mixing, and compared it with common forced mixing and mixing with air entraining agent. It indicated that the blade of the mixer, also as the vibrating source of vibrating mixing, had a significant effect on the air content of fresh concrete and compressive strength of hardened concrete; the air content of the fresh concrete could be up to 3.0%~3.5% when the vibrating strength was 4~8, and meanwhile the compressive strength of the hardened concrete was higher; different with improving the air content by adding air entraining agent, the vibrating mixing could increase the air content in the concrete by more retained air from bubbles refined in the mixing process and make the diameters of pores inside in the decreasing direction. In this case, it could not only improve the air entraining effect to achieve the high value of air content required by the construction, but it also could increase the compressive strength of the concrete comparing with the forced mixing with air entraining agent.
Observation Study on the Cooling Radius of a New Type of Heat Pipe in the Middle-Latitude Swampy Permafrost Regions
Authors: Chen Ji , Li Kun , Sheng Yu , Dong Xian Fu , Zhang Lu Xin
Published: October 2011

The Chaidaer-Muli Railway (abb., Chaimu Railway) was constructed in the Qilian Mountains, where middle-latitude swampy permafrost regions are developed. About 20km embankment was equipped with heat pipes. Taking into account the characteristics of local climate, the interaction between heat pipe and ground soils and secondary standard adopted by the Chaimu railway in accordance with the national railway, the structure and design parameter of the heat pipe were optimized. The wick structure and the adiabatic section were removed; the condensing section was reduced to 1.5m in length. In order to examine the cooling effect of heat pipe in the middle-latitude swampy permafrost, a testing field was built up in the middle part of the Chaimu Railway in the year of 2008. According to the field data from 2008 to 2010, cooling radius of heat pipe is 2.4m if it is treated as a standard that mean annual ground temperature at 3.0m deep was cooled down by -0.5°C. The results proved that design interval between heat pipes can meet the demands of cooling frozen soil roadbed in the Chaimu Railway.
Discussion on Management Mode of Construction Waste in China
Authors: Shao Wei Xing , Jiang Hong Yan , Zhang Zi Yuan , Wu Hui
Published: October 2011

Now in China, the management of construction waste still gets less attention than it deserves. The construction waste has caused huge consumption of limited resources and led to serious environment pollution. Consequently; it makes bad effect on China's sustainable development. Firstly, the definition of construction waste is provided in the paper. Then based on the analysis of the present management situation of construction waste, different of management modes of construction waste are evaluated, and then the mode of reducing construction waste from its source is presented, which would performs well to realize the reduction and recycling of construction waste. At the same time, this paper also puts forward the construction model of carrying out corresponding countermeasures; finally, the development trend of construction model in the future is prospected.
Changes of Pore Structures in Hardened Cement Paste Subjected to Flexural Loading and Wet-Dry Cycles in Seawater
Authors: Zhang Wu Man , Sun Wei , Jiang Jin Yang
Published: October 2011

The coupling effect of flexural loading and environmental factors has great influence on the pore structures in hardened cement paste. In this paper, Mercury intrusion porosimetry (MIP) and field emission scanning electron microscope (SEM) were used to analyze and observe the changes of pore structures in hardened cement paste subjected to flexural loading and wet-dry cycles in simulated seawater. The results show that the porosity greatly increases when the flexural loading level is raised from 0 f (the ultimate flexural loading capacity) to 0.8 f. Micro-cracks are observed and the connectivity, width and density of micro-cracks increase with the increment of flexural loading. The peaks position of pore size shifts toward greater micro-pores when the flexural loading was raised from 0 f to 0.8 f. The flexural loading and simulated seawater accelerate the degradation of pore structures.