bluuebunny/crossref_metadata_2025 huggingface dataset:
Uniaxial Compression Tests Research on C25 Glazed Hollow Bead Insulation Concrete
Authors: Zhang Ze Ping , Wu Di , Qiao Fei , Li Zhu
Published: October 2011

With the growing global energy crisis, development of economic and land-efficient construction structural system became an significant subject in Civil Engineering field. Under this context, material and structural test and theoretical analysis research is meaningful on new energy-saving building material, glazed hollow bead insulation concrete. In this paper, one mix design that meet insulation requirements of the energy-saving project on coefficient of heat conductivity and compressive strength have been chosen. Under the uniaxial status, prism samples of above mix design have been selected to do compression strength and deformation tests; Systemic analysis of the relationship between the strength and deformation for glazed hollow bead insulation concrete has been carried through, and some results have been provided, including the stress-strain constitutive relationship of glazed hollow bead insulation concrete with grade c25, prism compressive strength, strain, initial elastic modulus, residual strength, ductility, etc.
Research on the Traditional Residence Space Model of Beizhu Village in Jiaozuo
Authors: Ma Ming , Zhang Hui Hui
Published: October 2011

The dwellings of Beizhu in Jiaozuo station is the ancient dwellings of Ming and Qing dynasties. In this paper, the authors research the open space and indoor space form characteristics details. And sum up the respondent characteristics of space model.
The Establishment of Zhongshan Park and its Connotation of Cultural De-Colonization
Authors: Sun Yuan , Xu Su Bin , Zhang Tian Jie
Published: October 2011

De-colonization is an integrated part of modernization of the process of the 20th century in the world. It can be understood as a process which embodies two parallel movements-the colonized people’s struggle for independence and the colonial metropolitan country’s reaction. This paper takes the Zhongshan Park (formal Quanye Expo) in Tianjin’s Chinese settlements as a specific case and investigates the interplay between native culture and colonial culture in the park building process. Through investigating the Chinese Municipal Parks, the paper elucidates the conflicts between colonialism and nationalism contextualized in Sino-West cultural encounters, and reveals the Chinese efforts for cultural de-colonization in early 20th century.
Seeking Ourtopia through Mega Event: Succession and Innovation from Expo 2010 Shanghai Industrial Heritage
Authors: Liu Feng Ling , Chu Dong Zhu
Published: October 2011

Every Expo has constantly played a significant role in the exploration of us. Exploration here indicates a realizable dream rather than a pure Utopia. To describe this definition exactly, a new word “Ourtopia” is created, blending “Our” into “Topos” from ancient Greek, describing an attainable one through the transformation of the ideal into the real with a plurality of thought and action. Under this unique context, Shanghai Expo provides an opportunity to achieve Ourtopia from choosing of Expo sites, rebuilding of UBPA, reconstruction of industrial heritage itself. Through Shanghai Expo, industrial heritage succession is defined as a period of balancing different values, especially culture and economic. And, industrial heritage innovation between Pre-and-Post Expo must be based on analyzing these three comparisons---event-based VS. necessity, temporary VS. permanent, super-scale VS. comfortable-scale. Accordingly, other cities study from Shanghai Expo sample in terms of three perspectives--- Mega event VS. non-mega event, short periods VS. long-term impact, nationality VS. locality, thereby exploring industrial heritage potential value.
An Exploration of Huizhou Architecture Connotation in the Background of Traditional Culture Changes
Authors: Zheng Yu Chun , Yan Chun Mei
Published: October 2011

It is an important prerequisite for the profound understanding of traditional architecture culture to analyze the changes of traditional culture and master the development trails of local culture. The unique geographical position and brilliant culture background of the ancient Huizhou result in Huizhou architecture. Further exploration of Huizhou architecture culture connotation in the background of traditional culture changes can help us better understand its value. Only by deeply analyzing and grasping local culture can rural-urban builders better protect and follow the tradition and then make some creation and development.
Experiment Study on the Frost Resistance of Steel Fiber Reinforced Concrete on the Microstructure
Authors: Jiang Lei , Niu Di Tao , Bai Min
Published: October 2011

Based on the fast freeze-thaw test in 3.5% NaCl solution, the frost resistance of steel fiber reinforced concrete (SFRC) was studied in this paper. On the basis of scanning electron microscope (SEM) and mercury intrusion method, the microstructure and pore structure of SFRC was analysed. The reinforced mechanism of SFRC under the cooperation of freeze-thaw and NaCl solution was discussed. The test results show that adding appropriate amount of steel fibers into concrete can reduce the pore porosity and improve the compactness of concrete. The effects of steel fiber with proper volume fraction can inhibit the peeling of the concrete and reduce its damage rate. The volume of steel fiber on the frost-resisting property of SFRC is obvious.
The Humanistic Comfortableness Creation in External Space of the Public Rental Housing Community
Authors: Chen Gang , Lin Jian
Published: October 2011

This paper takes the exterior spaces of the PRH community as the research object, and based on the humanistic comfortableness of the living-environmental comfortableness evaluation, by the analysis on the regional characteristics of the sandwich-layer crowd’s activities, and proposes the construction strategy to the exterior space design of the PRH community within the architecture design scope, to realize the creation of vitality and humanistic comfortableness in the PRH community.
Dynamic Analysis of Frame-Shear Wall Structure of Concrete Filled Steel Tube under Rare Earthquake
Authors: Hu Xiao , Gao Yong Tao
Published: October 2011

.In this paper, seismic behaviors of the frame-shear wall structure, which are composed of the concrete filled steel tubular (CFST) column, have been studied. Dynamic behaviors and earthquake responses of the CFST under rare earthquake are analyzed. Comparing the calculation results, the earthquake resistant behavior of the CFST structure has been appraised synthetically, which may be referential for structural design.
Research on Building Construction System of SDE2010
Authors: Liu Hui , Gao Hui , Wan Da
Published: October 2011

SD (Solar Decathlon) attaches great importance to the full utilization of solar energy in buildings, while emphasizing new materials, new technologies and rational utilization with the ICS (Industrialized Construction System). This research is trying to study the construction systems used by SDE2010 teams and thus analyze the characteristics and applicability of various types of construction system so that provide the basis for the future choice of system to the team afterwards, consummate the combination of solar energy applications and building construction system meeting the premise of competition rules.
Let "Ruin" into a "Home" — Create a Ruins Environment in the Contemporary Urban with the Model of Ecomuseum
Authors: Wang Xiao Min , Li Fan
Published: October 2011

Facing the current rapid development of economic and the constantly renewal of urban appearance, this article discusses the ideas about creating a ruins environment in the contemporary urban with the model of “Ecomuseum” from the point of sustainable development. Through the establishment of ecomuseum , the exhibition activities happen from indoor space to outdoor place; the exhibition content organically combine with the humanistic landscape and landmarks, natural environment and community life. This space mode not only focuses on ruins itself, but also tends to comprehensive rehabilitation and utilization about the ruins area environment. This mode play an important role for the Overall protection of the urban sites and continuous inheritance of historical context.
Study on Design Processes of Urban Residence Based on Whole Life Cycle Concept
Authors: Chen Gang , Liu Xiao Chun
Published: October 2011

As we enter 21st century, the environmental problem is increasingly prominent. Chinese urban residence construction stands in the transition period of sustainable development. How to realize low energy consumption, long service life and high quality of residence becomes a subject to be solved in Chinese residence construction in new era. For China's traditional residential design and construction method formed as a linear process and single data feedback as well as great loss of information in design, the residential quality and properties have not only been unimproved, but have also led to relatively more time and costs spent. This paper introduces a design concept of whole life cycle and points out the traditional design concept and processes of the residence construction must be charged in order to realize its sustainable development. According to the design concept of the whole life cycle, this paper puts forward the residence design principle based on whole life cycle and institutes the residence design processes based on whole life cycle.
Analysis of Space Planning and Design Principles in Campus Site Based on Spirit of University
Authors: Wen Tao
Published: October 2011

The spirit of University is recognized ideal, faith, value and principal of behavior, which is stably and distinctively developed in the process of establishing University. Campus planning design aims to fulfill the life requirements of the user, the relation between place and human emotion, the relation between place and nature, the requirement and sense of the user of the architecture, architecture humanism must be given adequate attention during the campus planning and design. In the dissertation, the analysis both campus space problem, and the university campus spirit space, are discussed. And furthermore, the related methods are summarized as well.
Exploration on Color Environment Design of Blocks in Beijing City Abstraction
Authors: Wang Jun Tao , Xiao Hui , Wang Liang
Published: October 2011

This paper first discusses the background and significance of color environment design of Beijing city, and points out the need to carry out color environment design of micro-level building blocks and constructions. Then it analyzes the function of architectural color and meaning of color psychology, and studies the environment color of city blocks from the macro and micro levels. In addition, it further proposes principles of environment color planning and designing in city blocks.
Thermal Performance Experimental Study of Hot Wall in Cold Region
Authors: Ren Hong Guo , Li Gui Wen , Fang Xiu Mu
Published: October 2011

In order to satisfy the requirement of villages indoor thermal amenity in winter in cold district in north of china, thermal performance of level, vertical flue smoke organization form hot wall have been tested. The experiment use Testo flue gas analyzer, BES-C portable computer multi-channel data acquisition instrument, the infrared thermography and so on to acquire basic data of two type flue layouts hot wall. These parameters include smoke composition, the inport and export smoke temperature, smoke quantity, metope temperature of hot wall and so on. And then record the test data, calculate evaluation index of the thermal performance, which are metope temperature standard deviation, thermal inertia and heat efficiency, etc. According to the value of the heat efficiency, we can judge the thermal performance of two kind of hot walls. The test results shows that the heat efficiency of level flue smoke organization form is 68.9%, and the heat efficiency of vertical flue smoke organization form is 62.1%. The heat efficiency of hot wall in the form of level flue is higher, better meet the requirement of heating facilities in energy saving, residents thermal amenity.
Ecological Solution Research for Water Network Protection of Small Towns in Southern Jiangsu
Authors: Huang Yao Zhi , Li Qing Yu , Zhou Yin Bo
Published: October 2011

Water network play an important role in the natural and human environment, green network is basis for achieving ecology; town is main focus of environment which is hot research issue. Systematic layout of the water network, green and urban space is core contents for ecology planning in water networks. The article research ecology through water networks and green, therefore, distribution problem such as water, green land and construction land could be solved properly; we can achieve comprehensive development on the premise of ecological function, thus, human and natural's networks and ecological combination can be achieved at the same time.
The Highway Architecture Characteristics
Authors: Li Zhu Long , Huo Ming , Gu Xiao Xu
Published: October 2011

The traditional highway development even pays more attention to the technique index of the highway,emphasizing the service ability and the service quantities and to for national economy.Usually emphasized" technique" factor for the highway but neglected the people’s request of environmental protection, cultural,region,art and other comprehensive factor. The highway architecture is to study the highway buildings structure, function ,environments and pepoles activity etc,certainly also includes two aspects of technique and art.
Research on the Treatment of Dyeing Wastewater by Heterogeneous Catalytic Ozonation Process
Authors: Wang Li Ping , Mao Yong Jing , Guo Yu Chuan , Du Er Deng
Published: October 2011

It is of great practical significance to develop integrated processes with high efficiency, adaptability and stability to treat the dyeing wastewater with the feature of high organic matter, high-color and large ranges in water quality and quantity. In this paper, a novel catalyst MnOx+FexOy/AC was prepared by the impregnation method. The catalyst was used in the heterogeneous catalytic ozonation process to treat the dyeing wastewater. The results showed that the optimal Fe:Mn ratio of catalyst is 1:2. Under the optimized conditions of pH 5, ozone aeration rate 0.2L/min, catalyst dosage 20g and the reaction time 60min, the removal rate of COD, NH3-N, TP, Chromaticity were 81.7%, 90.2%, 93.4%, 99.1%, respectively. The heterogeneous catalytic ozonation is a promising process for the treatment of dyeing wastewater.
Sustainable “Low-Tech” Architecture–Take Traditional Residential Houses in West Hunan for Example
Authors: Zhong Ming Fang
Published: October 2011

The traditional residential houses in west Hunan, China were built on principle of be in harmony with the nature, with minimal alteration to the environment and with layouts that highlights natural environment. They are made of local building materials - renewable natural resources - with natural texture and simple processing procedure that takes the lowest transportation and processing cost. The structure system of the house is pre-cast timber frame construction highly developed during Chinese architectural history. It’s safe, steady, economic, and makes use of timber resource high efficiently. These original and “low-tech” – compared with the modern “high-tech” concept – but most operational ways are the advantages of the traditional buildings that modern buildings should learn from with regard to the environment and sustainable development.
The Analysis on the Test of Impact Rolling on the Roadbed of HW
Authors: He Yong Ming , Ma Zheng Jiang
Published: October 2011

Use the experimental method to know if impact of rolling is suitable for the roadbed of Harbin to Wuchang. By Observation and analysis on the Settlement, the compactness and the deflection, it is known that all indicators Comply with regulatory requirements. Therefore, the impact of rolling method can be used.
Discussion on Application of Digital City Construction in Wuhan
Authors: Lin Nan , Liu Fei
Published: October 2011

The article from the perspective of the construction of digital city, analysed the necessity of digital wuhan construction, introduced digital wuhan's construction frame, from aspects of urban planning and infrastructural facilities, urban transport system, urban management, e-government, digital tourism, have discussed the digital application of city construction in wuhan, summarized and forecasts the prospects for development of digital wuhan in three dimensional digital map, digital community building and public services fields.
Parametric Design in the Context of Ethics
Authors: An Wei Qiang , Wang Chong
Published: October 2011

Parametric design，the mainly style for Neo-avant-garde in 21 century, has satisfied all the appeals on design methods when the computer technology has been imported in architecture design by avant-gardes. As another paradigm that has been looked as the successor of modern architecture, parametric design has effected and remolded our cognitive styles through its special way. This article is going to analyze the rationalities of the parametric architecture in the context of ethic and to discuss the relationship among people, city and nature in the context of technology and social culture.
Flow Forecasting of the Regulation of Parallel Water Pumps with Variable Numbers
Authors: Fu Yong Zheng , Liu Hui Hui , Cai Ya Qiao , Jiao Yang
Published: October 2011

For the closed loop water system, taking ISG single stage single suction centrifugal pumps for example, we calculate the flow of the single pump and the system, which is regulated by changing the number of parallel water pumps. According to the specific speeds, during the regulation, we induce the relations between the relative flow and the relative numbers of the single pump and the system, respectively. These relations can be applied to the flow forecasting of parallel water pumps with variable numbers in the closed loop water system.
Research Status of Design Theory and Application on Beam-Column Semi-Rigid Steel Structure
Authors: Zhang Zai Hua , Shu Xing Ping , Yuan Zhi Shen , Duan Qi Cheng
Published: October 2011

Brief description of the basic idea of semi-rigid joints is given. Several types of joints are showed combined with the development of the study in recent years. The classification and design methods of semi-rigid joints in steel structure design specifications of the USA , Europe , Canada , Hong Kong are introduced and discussed. Several problems to be studies and the way of further research directions are given.
Experimental Study on Compressive Bearing Capacity of High Strength Concrete-Filled Steel Tube Composite Columns
Authors: Kang Hong Zhen , Yao Lei , Song Xi Min , Ye Ying Hua
Published: October 2011

To study axial compressive strength of high strength concrete-filled steel tube composite columns, tests of 18 specimens were carried out. Parameters of the specimens were the confinement index of concrete-filled steel tube, the cubic strength and the stirrup characteristic value of concrete outer of steel tube. Test results show that the concrete-filled steel tube and the reinforced concrete deformed simultaneously in the axial direction before and at the peak value of axial compressive force; after failure of the reinforced concrete, the concrete-filled steel tube can still bear the axial load and deformation; the main influential factors of axial compressive capacity are confinement index, the cubic strength and the stirrup characteristic value of concrete outer of steel tube. The accuracy of the formula of axial compressive strength of composite columns provided by CECS 188:2005 is proved by the test results of this paper.
Corrosion of High Strength Steel Bolt Friction Type Connection Test of Performance Degradation
Authors: Xu Shan Hua , Lin Xue Cai , Qiu Bin , Zhang Meng
Published: October 2011

This article study the connecting performance of the corrosion high-strength bolts. According to the experiment of anti-slippery,the essay investigate anti-slippery coefficient, sliding load and ultimate load affected by the the extent of corrosion.The articl aslo study about the load-displacement cure of high-strength bolts connecting,which study The difference of the relation between load and displacement in each stages,cause by the whether the high-strength is corrosion.
Tests on Mechanical Properties and Anti-Explosion Performance of Steel-Fiber Reactive Powder Concrete
Authors: Song Chun Ming , Wang Ming Yang , Wang De Rong
Published: October 2011

In order to get mechanical properties and anti-explosion capability parameters, some RPC samples with 5% steel fiber are tested, many groups data were obtained such as compressive strength, shear strength and fracture toughness. The model tests are also carried out on RPC shelter plate under contact explosion, the most important parameter to express anti-explosion capability,i.e. compression coefficient of the material, is obtained by above experiments and theory study, the results of tests show RPC with steel fiber has very high strength and anti-explosion capability, its compressive strength and anti-explosion capability are about six and three times higher than those of C30 concrete respectively.
Research on the Prefabricated Prestressed Cylinder Foundation of Wind Turbines in the Soft Soil Region
Authors: Ma Ren Le , Zhang Ming Yi
Published: October 2011

With the rapid development of inland wind farm in China, the costal wind farm still has not got large-scale development as the result of the higher cost of fan foundation and the more difficulty of construction. The prefabricated prestressed cylinder foundation (PPC foundation), as a new type of wind turbine foundation designed for the soft soil region such as the inter-tidal coastal zone and inland wetlands, is introduced in this paper. The condition of lateral earth pressure distribution around the foundation which determines the flexural capacity of fan foundation in the soft soil is studied. Through theoretical analysis and mathematical derivation, the result shows that the lateral earth pressure around PPC foundation is changed with depth by 1.5th power curve which has good fitting to the finite element analysis result. The simplified and improved design process is applied into the practical engineering and the good economy of PPC foundation is proved.
The Seismic Response Analysis of Damaged Slip Component of Sliding Isolated Structure
Authors: Xiong Zhong Ming , Qin Gao Ming , Zhang Zhi Hui
Published: October 2011

In the service of sliding isolated structure, the slip component damage degree determines the safety of sliding isolated structure. The seismic response analysis about a sliding isolated frame structures was obtained by the finite element analysis software SAP2000 at various loads and compared with the traditional structure. Seismic response differences between slip component of the different forms and number damage was studied. According to Teflon invalid and the displacement-limited of energy dissipation component invalid, the impact of seismic response owing to slip component damage was analyzed. It will provide a reference for the isolated building design, the effective maintenance and damage detection.
Support Vector Machine-Based Aqueduct Safety Assessment
Authors: Qu Qiang , Chang Ming Qi , Xu Lei , Wang Yue , Lu Shao Hua
Published: October 2011

According to water power, structure and foundation conditions of aqueduct, it has established aqueduct safety assessment indicator system and standards. Based on statistical learning theory, support vector machine shifts the learning problems into a convex quadratic programming problem with structural risk minimization criterion, which could get the global optimal solution, and be applicable to solving the small sample, nonlinearity classification and regression problems. In order to evaluate the safety condition of aqueduct, it has established the aqueduct safety assessment model which is based on support vector machine. It has divided safety standards into normal, basically normal, abnormal and dangerous. According to the aqueduct safety assessment standards and respective evaluation level, the sample set is generated randomly, which is used to build a pair of classifier with many support vectors. The results show that the method is feasible, and it has a good application prospect in irrigation district canal building safety assessment.
Overview of the Research on Connections in Composite Frames Consisting of Reinforced Concrete Column and Steel Beam
Authors: Men Jin Jie , Shi Qing Xuan , Zhou Qi
Published: October 2011

Frames consisting of reinforced concrete column and steel beam (RCS) is a new type of composite structures. Background of the research and application of the RCS composite joints and composite frames are overviewed detailedly in this paper. Then the research evolution of the RCS composite joints including experimental research and numerical simulation in America, Japan and China are described in detail. Finally some problems existing and the development directions of research on RCS framing systems in future are pointed out.
Study on Financing Mode of Transport Infrastructure During Post-Disaster Reconstruction
Authors: Liu Hui Jun , Li Hui Min , He Jie
Published: October 2011

The paper analyses the damage condition of transport infrastructure in Wenchuan earthquake and eplores the possible difficulties in post-disaster reconstruction. Next,the thesis put forward a feasible financing model for the post-disaster reconstruction, which providing a basis of decision making for reconstruction work.
Multi-Resolution Analysis and Damage Identification of Structure
Authors: Jiao Li , Zhang Hai , Liu Hong Wei
Published: October 2011

By using wavelet multi-resolution analysis, damage sensitivity in different acceleration responding signals from different locations of the structure are studied in this paper. Through numerical analysis of a five-layer frame structure, the result shows that the sensors in different location have different capabilities in denoting the damage signal. Each sensor can only denote the working status of the surrounding area. Single or some of the sensors may lead to false diagnostic results. It can be concluded that multi sensors with data fusion method is the effective way to solve the problem of limited information by single sensor.
Shear-Lag Phenomenon in Cast-in-Site Reinforced Concrete Hollow Floor System
Authors: Huang Zhu Ye , Chen Cheng
Published: October 2011

Shear-lag phenomenon exits in many long-web structure especially when the stiffness of web is much larger than that of the flange’s. In this paper, Energy-Variation Method is applied to interpret shear-lag phenomenon in cast-in-site reinforced concrete hollow floor system. Finite Element Method (FEM) and is then used to validate the analysis results. The solution for the variation equation for effective flange width is proposed by solving the differential equations using proper boundary conditions.
Temperature Analysis in Durability Test of the Viscous Damper
Authors: Wang Wei Ning , Yan Wei Ming , Chen Yan Jiang
Published: October 2011

The cylinder is prone to be damaged due to temperature increasing in vibration control and durability testing process of viscous damper. In order to avoid the overheating generated by long working hours, which resulting in a viscous liquid water evaporation and leading to a abrupt increase in internal pressure inside the cylinder, the CFD software Fluent was used to simulate the durability test process of the oil film, where the heat was easy to generate and suggestion for improving the viscous damper was proposed.
Nonlinear Dynamic Response Analysis of the Braced Steel Frame with Wedge Devices
Authors: Lei Jin Song , Zou Yin Sheng , Wang Ya Li , Ma Qing
Published: October 2011

In order to research the nonlinear dynamic respond analysis of a new braced steel frame with wedge devices under the action of earthquake, its damping mechanism is analyzed, and the computational model is obtained. Based on the mechanism of multiple resistant lateral system, the explicit nonlinear dynamic analysis and dynamic contact algorithm are adopted to separately analyze the steel frame with no brace, with centric and eccentric brace, and with the new braced wedge block. During the analysis, in order to take the material and geometrical bi-nonlinear into account, the material model is chosen as the bilinear equivalent strength, and the explicit centered difference algorithm is adopted. It can be obtained from structural deformation and energy and so on. The results show that the stiffness of structure decays after plastic deformation in the earthquake effect, and the hysteresis energy consumption and system dumping appear. The nonlinear dynamic response of steel frame is affected by resistant lateral stiffness, plastic deformation, and system damping. The braced steel frame with wedge block regulates the displacement and acceleration response with yield energy dissipation of brace, as it provides resistance lateral stiffness to control the deformation. This kind of structure has strong adaptability to earthquake intensity and good seismic performance.
Theoretical and Numerical Analysis on the Seismic Response of Underground Structures in Existence of Isolators
Authors: Liu Jin Chun , Huan Yi
Published: October 2011

In this paper, an analytical method of the beam with springs and dampers fixed at the ends was proposed based on equivalent single degree of freedom (SDOF) system and secondary Lagrange’s dynamic equations, in order to develop a new effective method to enhance the aseismic capability of underground structures. The dynamic response of elastically supported and damply supported beams subjected to both seismic loading and static axial loading was analyzed by the proposed analytical procedure. The theoretical results were validated by the numerical simulation. In order to further investigate the effects of springs and dampers fixed at the ends of the columns in nonlinear response situation, the 3D nonlinear seismic responses of the Dakai metro station structure with and without the isolators were analyzed by ABAQUS respectively. It is demonstrated that: (1) the proposed analytical procedure can predict the dynamic response of beams with elastic and damper supports subjected to both seismic loading and axial loading. (2) Setting isolators at the supports of the column could enhance the aseismic capability of the structure effectively. (3) The axial static loading induced by the gravity of the soil and structure provide the constraint on the column, and therefore could not be neglected in the structural dynamic analysis.
Research on Interaction Mechanism between Segmented Lining Structure and Surrounding Loess under Activing Ground Fractures
Authors: She Fang Tao , Shao Sheng Jun , Fang Juan , Xu Ning Fei
Published: October 2011

In ground fracture region, Xi’an subway adopted segmented lining to adjust for the differential settlement. We applied three-dimensional finite difference method to simulate “plateau type” ground fractures. The conclusion is that segmented lining structure can restrain tunnel surrounding soil deformation near ground fractures effectively. Far away from the tunnel longitudinal axis, the surface settlement is consistent with free field. The change region of the soil pressure mainly distributes in 30m of ground fractures upward and 20m of ground fractures downward. The axial stress, major principal stress and minor principal stress on the inner side of lining with tunnel axis is more tensile than the outside one, and their tensile region are concentrating in the waist lining structure, their compression region are mainly distributing in vault and arch bottom. Based on the results, we suggest that the pulling reinforcing steel should be used in the waist lining structure.
Structural Vulnerability Analysis Based on Beta Distribution
Authors: Wu Qiao Yun , Zhu Hong Ping , Fan Jian
Published: October 2011

The research of structural vulnerability analysis is mostly based on the Cornell theory. Using other methods to do seismic fragility analysis is relatively rare. In this paper, beta probability density function is used to continuously fit the probability distribution of damage levels for a frame structure under given seismic intensities. It gets the probability density distribution of the structure under different intensities. The results show that, based on beta probability density function, it can get comparatively accurate solution for structural seismic vulnerability analysis. This method is not only simple and fast, but also the damage state is expressed by continuous damage parameter. The research provides the reference for future earthquake damage prediction and the elaborate calculation about economic loss of earthquake insurance.
The Time History Analysis of the Frame Structure with Special-Shaped Columns Considering Torsional Component of the Earthquake
Authors: Xu Dong Qiang , Li Pin
Published: October 2011

This paper is concerned with the study on internal forces of structure by building model in ANSYS under unidirectional seismic wave, bi-directional seismic waves and two-way and reverse seismic wave. The results revealed that the moment effect of frame structure under bi-directional seismic waves and two-way and reverse seismic wave is bigger around 30% than it under unidirectional seismic wave. And the torque accretion multiple of irregular structure is bigger around 1 than the corresponding regular structure. Therefore, we should take into account the effect of multi-dimensional seismic and the torsional effect of the irregular structure in structure design.
Engineering Geological Characteristics of one High Cut Slope in Chongqing Wanzhou
Authors: Liu Hai Yan , Lv Da Wei , Cui Yong Jun , Zhao Hong Gang , Han Shuai
Published: October 2011

Based on the methods of qualitative and quantitative, the engineering geological characteristics of one high cut slope in Wanzhou region of Chongqing is evaluated. The results are obtained: (1) the stratum composed of the high cut slope from top to bottom are artificial accumulation including gravel soils, residual silty clay, silty mudstone; (2) the main weak planes include the interface between soil and rock, two group joints and fissures in the bedrock and bedding plane in the high cut slope; (3) based on the results of stability evaluation, it’s in stable condition at present, but has dropped stone and collapse phenomenon. In the long term effect of weathering and groundwater, the overlying soil creeping deformation along the flare mudstone level would occur.
The Seismic Dynamic Response on the Steel Spatial Arch Truss with 60 m Span and 0.4 Rise-Span Ratio
Authors: Li Hai Wang , Guo Jing Jing , Liu Jing
Published: October 2011

In this paper, the elasto-plastic dynamic analysis on the steel spatial arch truss with 60 m span and 0.4 rise-span ratio is carried out under earthquake wave with SAP2000. In the analyses, the geometric and material nonlinear effects are considered at the same time based on the plastic-hinge theory. Under the action of EL wave with the peak increasing gradually, its elasto-plastic dynamic responses have been obtained. The results show that its failure mode under the earthquake action is elasto-plastic dynamic buckling; that its critical peak acceleration of EL earthquake wave when applied in horizontal direction is 808.5 gal, and is 789.0 gal when applied in vertical direction; The ratio of its maximal node horizontal displacement and its structural height is 1/259, and its displacement ductility coefficient is 1.071; The ratio of its maximal node vertical displacement and its structural span is 1/736, and its displacement ductility coefficient is 1.105.
Study on Settlement of High Fill Embankments on Rock Slope under Complicated Stress Conditions
Authors: Liu Sheng Chuan
Published: October 2011

Compared with general roadbed，high fill embankment has the characteristics such as higher height， larger cumulate settlement and it’s stability should be technical analyzed. High fill embankment is one of the most important projects in highway engineering. The settlement in highway construction, especially the differential settlements, may lead to the cleft and stagger of pavement，and largely affect the quality of driving as well as the operational life span. So how to reduce the settlement and get rid of the danger made by the settlement has been an important subject in highway construction field and the research has important reality significance. Therefore, in order to master the deformation law of high fill embankment on rock slope under complicated stress conditions, systems of monitoring network are established to monitor the settlement of high embankment with strong weathering filling, high embankment on rock slop and high rock fill abrupt slope embankment respectively. Through analysis of settlement of high fill embankment stability under complicated stress conditions, conclusions are made in details.
Numerical Simulation of Shield Tunnel Crossing Masonry Structure Building with Various Degrees
Authors: Wei Gang
Published: October 2011

Considering the interaction of building-soil-tunnel, the strip foundation masonry building vertical crossed by shield tunnel was simulated by 3D MIDAS/GTS software, and the stress and deformation of building before and after shield machine through the building were analyzed. The results showed that: the deformation and the force are different with different angles through the building; with the angle increases, the central base settlement slightly increased; the maximum overall differential settlement reached at 45 degrees; the maximum shear strain is reached when the machine is completely through the building; with the increase of crossed degree from 22.5 degrees, 45 degrees, 67.5 degrees to 90 degrees, the maximum shear strain of wall increases; the plastic zone of wall is mainly at the top cross position in the wall.
Comparative Study of SDOF Response between Viscous Damping and Complex Damping Model
Authors: Chen Rui Xue , Peng Ling Yun , Yan Wei Ming
Published: October 2011

This article summarizes the work regarding the complex and viscous damping models of SDOF system. Through calculating dynamic equations based on harmonic excitation, the result is that: when the excitation's period is less than the structure natural period, the displacement, velocity, acceleration responses of the complex damping system are stronger than the latter. Further, the displacement and the velocity spectra of some representative earthquake records are provided of two models, which show the similar trend as harmonic excitation. But the absolute acceleration spectra values of the complex damping model are higher than the other one at most time. And generally with the growing damping ratio and structure natural period, the difference is more significant. Under certain earthquake records, the structure displacement spectra values may differ by 17%, the velocity values differ by 20%, the acceleration values differ by 15%.
Basic Principal and Design Methodology of Progressive Storey Collapse Resistance in a New Type RC Twin-Frame Structure
Authors: Jia Hao Hua , Wei De Min
Published: October 2011

According to earthquake hazard, normal frame structures could hardly avoid failure of ‘Strong Beam and Weak Column’, weak layer and even progressive storey collapse under strong earthquakes, a main reason is the lack of second seismic fortification line in frame structure. Based on the design thought of multiple seismic fortification lines, reinforced concrete twin-frame structure is initiated in this paper. Major feature is increases of redundant constraints and load paths due to added outer limb-columns could take effect as the second seismic fortification line. Twin-frame structure could not only fulfill the demand of ‘three levels, two stages’ in seismic code, but also have been designed through the third stage of ‘resist progressive collapse’, using key member method to promote safety storage and deformability of outer limb-columns, using removal key member method to verify vertical ultimate load of frame beams in weak layer. Though twin-frame structure could not completely avoid plastic hinges in column ends, progressive storey collapse will not appear in this kind of structure. Twin-frame structure is a new structure system which could be applied in constituting new projects as well as strengthening and rebuilding existing projects, further research can be done on this structure system.
Urban Air Quality in Streets and Road Planting Patterns
Authors: Wang Cui Ping , Li Zhi Min
Published: October 2011

The advantages and disadvantages of shade trees for pollutants absorption are analyzed theoretically, through actual inspect and data analysis of typical roads in Xi’an City with CO as environmental tracer. The main factor of green belt hindering the gaseous pollutants diffusion was the canopy density and not the vegetation quantities, thus over increase in green quantity is of nobenefit in urban road planting, and some ideas for green planting in urban street is recommended.
Recycled Plaster: Physical and Mechanical Properties
Authors: Bardella Paulo Sérgio , Camarini Gladis
Published: October 2011

Commercial plaster (CaSO4•1/2H2O) is a material used in building construction all over the world. This construction material is used renderings in internal and dry environment because it is soluble in water. According to different studies, the plaster manually applied as renderings produces high volume of material loss (values varying from 18% to 35%). In this way, the aim of this work was to study the physical and mechanical properties from pastes made with commercial plaster and pastes obtained from hydrated plaster that was lost from their applications (recycled plaster). The recycled plaster was grounded and burnt at different temperatures in order to loose its non-evaporated water and to make possible its reuse as binder. After burning, their physical and mechanical properties were studied. The results showed that recycled plaster had a good performance as binder. Their physical and mechanical properties related to commercial plaster were very similar. In this way, the results show that it is possible to reuse the recycled plaster as binder again, which permit to contribute to a sustainable construction.
Experimental Study on Dynamic Characteristics of Ionic Soil Stabilizer Reinforcing Red Clay
Authors: Lu Xue Song , Xiang Wei
Published: October 2011

Based on the red clay of Wuhan reinforced by Ionic Soil Stabilizer, the red clay soil is treated by different matches of ISS at first, then is tested in the Atterberg limits test and dynamic triaxia test. The results show that the plastic index decreases, and the red clay were greatly improved under the dynamic condition, the maximum dynamic shear modulus ratio acquired an incensement of 27.72% on average after mixing the ISS into the red clay. In addition, It was concluded that the confining pressure influenced the dynamic shear modulus and damping ratio to a certain extent. Given the same strain conditions, with the incensement of confining pressure increases, the dynamic shear modulus increased and the damping ratio decreased. Moreover, when plotting the dynamic shear modulus versus the dynamic shear strain, the similar curve can be formed for both the natural soil and the modified one, the dynamic shear modulus monotonously decreased with the incensement of the dynamic shear strain. However, the value of dynamic shear modulus differed in the same shear strain between the natural soil and the soil modified by ISS.
Effects of Parameters Designed by Bailey Method on the Property of Porous Asphalt Mixture
Authors: Zhang Ming Ming , Hao Pei Wen
Published: October 2011

Based on the Bailey method for aggregate grading design and evaluation, the parameter "reserved voidage" is used in porous asphalt method design. The paper studies the relationship between the three parameters (reserved voidage, blend by volume of the coarse aggregates totaling 100.0% and chosen unit weight of coarse aggregate) and the pavement performances, such as deformation, resistance at high temperature, low-temperature anti-cracking and moisture susceptibility of porous asphalt mixture. The test results indicate that the porous asphalt mixture designed by the modified Bailey Method is of the characteristics of air void easier to control and superior performance.
Study on Water Stability of Bitumen Mixture Under High Temperature and Moisture Conditions
Authors: Liu Hong Ying
Published: October 2011

The Work made use of two different asphalts-Shengli and Kalamayi and two different aggregates-Granite and Lime-stone to study the performance of asphalt mixtures under high temperature and moisture condition. Two modifers AST-3 and hydrated lime were investigated as prospective performance enhancers. Film stripping and marshall’s Retained stability tests were used to determined the adhesion characteristics and Moisture susceptibility of mixture, immersion wheel tracking test was used to study the rutting potential at high temperature in the presence of moisture.
Geopolymer Microstructure and Hydration Mechanism of Alkali-Activated Fly Ash-Based Geopolymer
Authors: Zhang Yao Jun , Li Hai Hong , Wang Ya Chao , Xu De Long
Published: October 2011

The microstructure and hydration mechanism of alkali-activated fly ash-based geopolymer were studied by means of scanning electron microscope (SEM) coupled with energy dispersive X-ray analysis (EDXA) and field emission scanning electron microscope (FESEM). The FESEM photomicrographs indicted that the fly ash-based geopolymer showed three dimensional frameworks with an average particle size of 50 nm. EDXA results demonstrated that the Na-PSS type geopolymer was produced via the disintegration of Si-O-Al and Si-O-Si chemical bonds and the polycondensation reaction between [SiO4]4-and [AlO4]5- tetrahedrons in spherical fly ash particles under alkaline condition.
Uniform Design for Preparation of Cementitious Capillary Crystalline Waterproofing Coating
Authors: Zhang Xiao Jie , Zheng Dian Mo
Published: October 2011

Uniform design was used to prepare and optimize the cement-based capillary crystalline water- proofing coating. Also the experimental data were analysized by DPS software and the optimization of coating formulations were obtained as follows: content of Ⅰwas 1.06%, content of Ⅱwas 0.57%, content of Ⅲ was 4.7%, content of Ⅳ was 1.36%, content of Ⅴwas 0.24%.
Magnetization and Microwave Absorption Properties of La0.67 Sr0.33 MnO3 with Different Particle Size
Authors: Cheng Yu Lan , Xia Ping , Wei Ke Xiang , Bai Quan
Published: October 2011

La 0.67 Sr 0.33 MnO 3 particles with different particle size have been prepared by sol-gel method. The structure, magnetization and microwave absorption properties have been investigated. The results show that the particle size can be controlled by sinter temperature. The peaks of the maximum reflection loss (RL) move to higher frequency regions with increasing particle size. The value of the maximum RL is -32 dB at 10.2GHz with a particle size of 58.5nm. The bandwidth with a RL exceeding -8dB reached 1.6GHz in the whole measured frequency range, suggesting that La 0.67 Sr 0.33 MnO 3 particles are promising for application as a wideband and strong absorption building microwave absorber.