bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of Coarse Aggregate Size on Softening Curve of Concrete
Authors: Zhao Zhi Fang , Feng Xiao Jie , Zhao Zhi Gang , Yang Li Jian
Published: February 2012

The program by Fortran to determine softening curve of concrete by inverse analysis was developed based on the wedge splitting test and Fictitious Crack Model (FCM). The four-linear softening curves were obtained by the inverse analysis program for the wedge splitting (WS) specimens which size are all 200mm×300mm×300mm with different coarse aggregate size. The approach of refining element mesh was presented for the inverse analysis calculation. It is shown that the three control parameters of softening curve, which are the tensile strength ft, maximum crack width wc and fracture energy GF, increase with increase of the maximum coarse aggregate size dmax.
A Discussion about the Improvement of Finite Element Analysis Units of Castellated Beam
Authors: Zhu De Bin , Cao Xiao Jun , Bai Ya Shuang , Zhang Qing Wen
Published: February 2012

Castellated beam is a kind of holed web plate structural beam, since it has many advantages: savings in steel, light self-weight, resists bending and easy to deploy, the application of this structural beam becomes more and more widely. Due to its weakened web plate, castellated beam would be affected by shear effects greatly. The deformation of components increased under the affects of external loads. Therefore, in order to improve the accuracy of finite element analysis model, by consideration of the shearing effects and the bending stiffness affected under opened structure, this issue made improvement based on the theory of curved beams. By compare the results from this issue and the result from the analytical model of shell elements; we verify the feasibility of this method.
Experimental Research on Seismic Performance of Cast-In Situ RC Grillage Shear Walls Formed with Heat Preservation Hollow Blocks
Authors: Zhang Wei Jing , Du Yi Nan , Qian Jia Ru
Published: February 2012

As a new type of structural system, the cast-in-situ reinforced concrete grillage shear wall system has functions of formwork, strength and heat preservation at the same time. It is suitable for residential buildings in seismic and non-seismic areas. The results of quasi-static tests on 20 specimens of small and large grid size grillage shear walls with different shear span ratios show that: both of small and large grid size grillage shear walls have excellent seismic performance; shear or bending deformation of horizontal and vertical limbs dissipate seismic energy so the elastic-plastic deformability of grillage shear walls meet the requirements of shear wall structure under strong earthquakes; the bearing capacity of grillage shear wall was calculated with formulas used for solid RC shear walls. The equivalent thickness of grillage shear wall equalized as solid shear wall is determined by elastic finite element analysis.
Nonlinear Finite Element Modeling of Concrete-Filled Circular FRP Arch Tubes under Monotonic Loading
Authors: Wen Ying , Teng Jing Guang , Yu Tao , Lin Guan
Published: February 2012

This paper aims to develop a numerical model to predict the in-plane load-deflection behavior and the maximum load carrying capacity of concrete-filled circular FRP arch tube (CFFAT) which to date has rarely been investigated. The present model employs the well known fiber element approach to consider the material behavior of concrete core and external FRP tube. The composite arch was idealized as an assembly of stepwise two dimensional (2D) straight prismatic beam-column elements. The established FE model was then implemented into Opensees software framework to obtain the load-deflection characteristics up to the limit strength state of CFFAT under monotonic loading. Comparisons between the present numerical predictions and experimental results reported elsewhere were made concerning the load carrying capacity as well as the ultimate failure modes. The proposed analytical model was shown to provide, with sufficient accuracy for practical use, the estimates of nonlinear static behaviour of CFFAT.
Experimental Research on the Durability of PVA Fibers Reinforced Concrete
Authors: Yan Yong Dong , Mao Jiang Hong , Lu Chun Hua
Published: February 2012

In order to investigate the effects of polyvinyl alcohol (PVA) fibers on the performance of concrete, such as strength, crack resistance, permeability and chloride penetration properties, experimental research were carried out in this paper . Three types of fiber reinforced concretes with 0, 0.5%, 1.0% volume fractions were designed with the same water to cement ratio of 0.43. Flat band method was used to evaluate the cracking resistance, while AutoCLAM and ASTM C1202 were adopted to measure the permeability of concrete. The experimental results showed that the workability and the compression strength decreased as PVA adding volume increasing. However, the tension and the bending strengths increased for PVA fiber concrete. The number of cracks induced by the shrinkage of concrete was reduced by adding more PVA fibers. The permeability and chloride penetration ascended as PVA volume increasing. However, all the parameters with regards to strength, crack resistance, permeability and chloride penetration for fiber reinforced concrete were more reasonable than those for the specimens without PVA fiber. In additional, a very good correlation between the permeability and the electric flux was found in this paper, that means both AutoCLAM and ASTM C1202 could be used for concrete penetration test.
Experimental Investigation of the RC Columns Strengthened with Outer Closed SCC under Cyclic Loadings
Authors: Zheng Jian Lan , Fan Wei
Published: February 2012

Experiment research for aseismic performance of RC Column strengthened by self-compacting concrete under second force is completed. By comparing three comparison columns and three columns strengthened by self-compacting concrete in low-cycle reciprocating horizontal loads seismic performance test, the specimen described the typical features of breakage, and the hysteresis and ductility of the RC column reinforced or not by self-compacting concrete is analyzed, the reinforcement effect by the different initial force is compared. The results show that: reinforcement by increasing the cross-section of self-compacting concrete is an effective method to significantly improve the shear strength of reinforced concrete columns and specimen ductility. The presence of the initial force have impact on reinforcing effect of RC columns, the greater the initial force, the more obvious impact.
Dynamic Characteristics of Curing Agent Modified Saline Soil in Laboratory Tests
Authors: Sui Zhi Li , Wang Xu Peng , Qu Chun Lai , Li Zhao Guang
Published: February 2012

In order to investigate the effect of coastal saline soil which modified by KD curing agent as the highway roadbed filler, a series of triaxial tests were conducted in the indoor. the law of the strength, dynamic characteristics and stress - strain relations against vibration frequency changing with dynamic load on modified soil were studied. Based on the experimental results, the morphology and mechanical properties of modified soil will not be affected under the dynamic load of earthquake and traffic. It can be showed a good correlation between the de-struction of plastic deformation and the classical power law model. The ratio that dynamic strength number di-vided by static strength number of modified soil is less than the ordinary clay under the same conditions. It can be concluded that the modified soil has good strength and durability, and it suitable for a safe and reliable highway roadbed filler.
A Concise Finite Element Model for the Analysis of Simple Wire Strand with a Broken Helical Wire
Authors: Jiang Wen Guang , Yan Li Juan
Published: February 2012

A concise finite element model for the analysis of simple wire strand with a broken helical wire under axial load is presented in this paper. Due to the implementation of accurate helically symmetric boundary condition, the analysis model can be established based only on a small slice of the wire strand cross-section consisting of all of the remaining intact wires excluding the broken helical wire. Full three-dimensional solid elements were used for structural discretization. The finite element results showed that the sharing of loads among the remaining helical wires is highly non-uniform. The two helical wires adjacent to the broken helical wire bear higher loads. The helical wire opposite to the broken wire bears least load.
Analysis of the Seismic Response of Long-Span Tube Shell Structures under Multi-Support Excitations
Authors: Wang Meng Hong , Song Fei Da , Zhuang Peng , Shi Song Song
Published: February 2012

Analysis earthquake response of the long-span tube shell structure under multi-support excitations. The response of the long-span structure in the earthquake is different between multi-support excitations and uniform excitation. Using sap2000 finite element software with time history analysis, this paper analyzes the impact of the different visual velocities combining with the engineering Projects, and its internal forces and displacements. The results show the impact of the long-span tube shell structure under multi-support excitations. Draw structure peaking acceleration and displacement of time-histories. Result shows that: The appearances of structure under multi-support excitations and under uniform excitation have the same trend. The peak of acceleration and displacement of the structural is different from multi-support excitations and uniform excitation, and the time of occurrence of the peak acceleration and peak displacement is also different.
Dynamic Time History Analysis of the Effect of Infilled Walls on the Steel Staggered-Truss System
Authors: Guo Qing Sheng , Yang Qing Shan
Published: February 2012

A structure with steel staggered-truss (SST) system is numerically investigated in this paper, utilizing the finite element 3D simulation analytial soft ware ETABS. Two different 3D models considering or ignoring the stiffness of infilled walls (SIW) are analyzed with Dynamic Time History method including storey drift and equivalent base shear force under frequent earth quake and rare earth quake. Results indicate that the effect of the SIW is prominent and should be considered.
Dynamic Analysis of Large-Scale Power House
Authors: Zhao Yu , Yuan Shu Fang , Zhang Jian Wei
Published: February 2012

The underwater structure of power house is major structure under the dynamic loads of unit. The vibration problem is very common in operation. So the structures should have sufficient stiffness to resist dynamic loads of unit. This paper establishes three-dimensional finite element models with finite element analysis software—ANSYS. Dynamic characteristics of the power house and dynamic responses of structure under earthquake are analyzed. The results of the computation show that fluid-solid coupling may be ignored when studying dynamic characteristics of structures of the underground power house.
Simplified Second-Order Analysis of Semirigid Connected Steel Frames
Authors: Xu Wei Liang , Xu Jian
Published: February 2012

The aim of this paper is to present a practical yet simplified method in the second-order analysis of semirigid connected steel frames. Based on the principle of new shear force distribution method, by taking partial frame as an analytical subassembly model and using a rotation spring which has variable bending stiffness to model flexibility of beam-column connection, this paper derives a simplified non-iterative inner force and lateral deflection computation formula considering P-Delta effects on semirigid connected steel frames. The numerical examples show that semirigid of beam-column connections obviously increases the horizontal displacement and P-Delta effect on the steel frame. Therefore the influences of semirigid connection should been considered in second-order analysis of building steel frame. The presented method is not only relatively practical and easily applicable to manual computation but also has a rather high accuracy, and can be used by the engineers in preliminary design for semirigid connected steel frames.
Influences of Beam Type Strengthened Storey on Horizontal Displacement in Super High-Rise Structure
Authors: Liu Xi Ping
Published: February 2012

The mechanics principle of setting strengthened storey to control the horizontal displacement in super high-rise structure was analyzed, several super high-rise frame tube structure models were established and the maximum peak displacement as well as storey displacement of the structure under the horizontal earthquake load were analyzed via the finite element program; Utilizing controlling structural horizontal displacement as a judge objective, the appropriate setting number of strengthened storey and optimization location were obtained; eventually, the methods on improving the lateral stiffness via setting beam type strengthened storey in super high-rise frame tube structure were put forward. The obtained conclusions are capable to be a reference for designers.
Crack Analysis of Reinforced Wooden Housing Model through Shaking Table Test in Villages and Towns
Authors: Zhou Ji , He Jing , Zhang Yan Hui , Zhou Cun Lei
Published: February 2012

The paper is special for wooden structure housing in villages and towns, and taken appropriate reinforced measures to achieve the standard of seismic design of no collapse in big or medium earthquakes. The 1/2 scale model that loaded horizontally on the shaking table was designed to observe its damage characteristics and make an analysis of its destruction. And the effectiveness of the reinforced method will be assessed.
Interfacial Shear Calculation of Concrete Beams Strengthened with FRP Plate under Temperature and Creep Effect
Authors: Yang Jia , Wang Lian Guang , Chen Bai Ling
Published: February 2012

Concrete beam reinforced with FRP plate has many advantages—high bearing capacity, light weight, fast construction progress, corrosion resistance, etc. The collaborative work between FRP and concrete is achieved through the binder, so the interface of them is the weak link. Under external loads, the interface of FRP-concrete will emerge inevitable internal force redistribution, and the FRP plate is a kind of resin material and its physical and mechanical properties will change with temperature and time. In this paper, using energy method, the differential equations of interfacial shear, meanwhile considering temperature and creep effect of FRP plate strengthening concrete beams were established. And the calculating formulas of interfacial shear under different loads were given.
An Integrated Model to Design Earthquake Resistant Structures
Authors: Nourbakhsh Mehdi , Zolfagharian Samaneh , Rosli Mohamad Zin , Nekooie Mohammad Ali , Taherkhani R. , Navazandeh Sajoudi Masoud , Kasraei Mohammadreza
Published: February 2012

Selection of the material and design of earthquake resistance structures are an important issue today. Many people die every year due to inappropriate design and selection of the materials. There are several software to be used for structural design of buildings, however they just design the structure based on some limited standards. There is a need to develop a computer-based earthquake resistant design model to integrate the current market’s software with different design standards of different countries. The objective of this study is to propose a model to integrate the local structural design standards/codes with available market’s programs. To achieve this objective, Microsoft Excel was used as the core of the model to be integrated with one of the market’s program. Then, the model was developed in three phases. To test the model, the Iranian design standard (Code 2800) was used to design a 7-story apartment. The results show that the model can be fully integrated with those market’s programs which support Microsoft Excel. The result of Phase 1 of the model is useful to select the optimum selection of the material while Phase 2 and 3 contribute to design of the earthquake resistant structure.
The Seismic Analysis of Cooperative Grid with Prestressed Upper and Lower Chord Cables
Authors: Nie Shi Dong , Dai Guo Xin , Xiong Gang , Zhang Wei Fu , Sun Xiao Hua , Feng Wei Qi
Published: February 2012

This document advances a concept of Cooperative grid with prestressed upper and lower chord cables, and points out its characteristics by comparing with different structure forms. Through an example of the Cooperative grid, the analysis is carried out by means of mode–superposition response spectrum method, and the mechanical characteristics of the Cooperative grid under earthquake action are researched.
The Test of Nitrogen and Carbon Removal by Leachate, Fecal Sewage and Municipal Wastewater
Authors: Shi Ming Yan , Feng Zhao Ji , He Kang Sheng , Li Jiang Peng
Published: February 2012

In order to solve the problem how to treat with nitrogen as well as COD simultaneously and to reached the water emission standards, by leachate, fecal sewage and municipal wastewater, an experiment has been studied through orthogonal experiment with A2/O.In this experiment, the mixture of those three wastewater is used as the influent. As the result shows, HRT (Hydraulic Retention Time) plays the key role in the experiment, and it is a simple and effective way to heighten an effect of the pollutants removal by extending HRT.
Reflections on Narrative of Contemporary Western Landscape Space
Authors: Qiu Tian Yi , Liu Song Fu
Published: February 2012

The current landscape space design ignored the existence of self-awareness and demonstration of Human Beings, meanwhile it also make human beings being dominated constantly. This thesis combined narrative, space, plot and other theories which related with the theory of landscape design explored the design methods which make the landscape views more appealing and space-create strategies which take narrative as spatial clues from the angel of main body in creation and started by aesthetic experience and behaviors of Human Beings, it also reflect harmonious spatial order between Views and Human Beings.
The Research on the Application of Soil-Rock Mixture Material in Rammered Earth Buildings
Authors: Zhou Tie Gang , Xu Ying , Zhang Chao
Published: February 2012

the traditional domestic rammered earth buildings technology use natural soil material without scientific and reasonable soil sample analysis and grading test, and artificial construction, so the rammered earth wall is usually low intensity and poor durability. This article researches the application of soil-rock mixture materials in modern rammered earth buildings with the soil-rock mixture engineering characteristic, the reasonable gradation and process improvement. We want to improve the defects of material selection and construction technology in traditional rammered earth buildings, promote sustainable development of green rammered earth buildings in the future.
A Study on the Design Mode of Pick-up & Drop-off Space in Kindergarten
Authors: Jiang Zheng Rong , Chen Yi
Published: February 2012

It is very common for parents in the city to drop off and pick up their children at the kindergartens, and it usually results in severe traffic jam because traditional kindergartens lack of space for such picking-up & dropping-off behavior. This article analyzes the current status of the Pick-up & Drop-off Space in kindergartens, studies the characteristics of the Pick-up & Drop-off behavior and the resulted space demand, learns from foreign experience, explores the design mode of such spaces and finally illustrates the mode by relevant examples. The study on Pick-up & Drop-off space has an important practical significance in both improving kindergarten building design specifications and guiding the construction of kindergartens.
Stochastic Damage Model of Concrete during Freeze-Thaw Process
Authors: Zhou Zhi Yun , Sun Min
Published: February 2012

Abstract. The anti-frost property of concrete is one of the major parts of study on the durability of concrete. By viewing all over the world, due to the alternation of external temperature upon and under zero centigrade, concrete structures located on the areas of high latitude are usually unavoidable to suffer the damage caused by freeze-thaw cycles. Due to the insufficiency of theoretical foundation and the complexity of freeze-thaw durability itself, the contemporary studies are far from integrity in respect to the theoretical consensus. What is more, the researching measures concentrate more on the experimental approach. Based on this, it would be necessary to carry out relevant theoretical study on the freeze-thaw durability of concrete. The freeze-thaw damage of concrete is equivalent to that when internally generated hydrostatic pressure during freezing thawing process is greater than the destruction produced by then tensile strength of concrete. Although hydrostatic pressure is uniform in all directions, concrete is a kind of uneven brittle material. When it's under the stress by three even directions, the final destruction always happens in the weakest section, which is very similar to tensile breakage. In this case, unilateral tensile can be used to simulate the internal hydrostatic pressure affection of concrete during freezing and thawing process. In this article, one-dimensional micromechanical model of random damage will be used to the research of freeze-thaw damage and try to quantify it.
Study on Characteristic of the City Based on Society of Phenomenology
Authors: Li Gang
Published: February 2012

Drab environment with no character have been commonplace in the city .The city lose characteristic of the city. The way on society of phenomenology analyses natural environment and building environmental and find characteristic of the city. The way on Society of Phenomenology may study Characteristic of the city. Society of Phenomenology finds Characteristic of the city from natural environment and building environmental.
Study on Planning and Design of Children's Outdoor Activity Places of Daily Life in Urban Residential Areas
Authors: Xiao Zhe Tao , Hao Li Jun
Published: February 2012

The children will be the social future, and are the vulnerable groups. Children's outdoor activity places of daily life in residential areas are the foundation of the children healthy growth, but these places often were disregarded in urban planning. This paper analyses the problems that we should pay attention to, and discusses the method of the children's outdoor activity places. It hopes that this paper will have a direct significance in planning and design of urban residential areas.
The Analogizing the City & Building Future by Analyzing Scene in the Science Fiction Films and the Human Action Desire
Authors: Chin Kyung Il
Published: February 2012

We say that the future city will be an automatic system for human like a science fiction films which means the 'Ubiquitous City or Intelligent City'. Actually, so many science fiction movies contain the wish or demand of human life. Generally, they show the convenience things for human life, the ideal image of future city, the solution technology of human being, and so on. In this world, every built thing is the product of human desire. Meanwhile, the scientific scenes in the movies are also the product of human desire. The reason of the above, this study tries to analogize image of city future by analyzing scene in the science fiction films and human action desire to make the future image. Eventually, this study is going to make 'human life scenario' in the future city which consisted with mixed scientific scene in the science fiction films and sorted by human desire for forecasting the future city. This scenario may apply for forecasting the real future city.
The Dilemma of the Implementation of the Yangtze River Delta Regional Planning
Authors: Wang Yong , Jiang Liang
Published: February 2012

The paper exposes the dilemma in implementing the Yangtze River Delta Regional Plan (YRDRP) through an analysis of the inception of initiative for the regional planning. The authors consider that the conflict between "Economic Zone" and "Administration Area” results in the current dilemma which is attributed by the game of interests and the lack of effective collaborative mechanism crisscrossing the organizational structures of the region as well as a strong trans-regional administrative body to oversee the implementation.
An Application of Aerial Photographs with Geographic Coordinates to a Rural Digital Map
Authors: Namboonruang Weerapol , Suphadon Nutthanan , Yong-Amnuai Prayoon
Published: February 2012

Making geological map Muangmai sub-district, Amphawa district, Samutsongkram Province area of Thailand is the example area. The conclusion of making map, which use the land section data together with the an aerial photography ortho- colour type and coordinate by GPS in field work and store data in digital map format, is totally 1,045 plots. These areas are summary of 3,944,000.00 m2 classified into 118,400.00 m2 for public roads, 108,800.00 m2 for public canals, 3,563,200.00 m2 for dwellings and agricultural lands and 153,600 m2 for public places, temples and schools.
Inquiry and Thinking about the Conservation and Development of Ancient Village
Authors: Tai Hui Xin , Zhao Shu Hong , Song Shao Hang
Published: February 2012

This paper analyzes the value for conservation and utilization of the ancient village, taking of Zhejiang historical and cultural village –Xiashan village in Kaihua County as a case study. It discusses the existing problem and the dilemma in the protection and development difficulty of ancient village. The principle of conservation, idea and measures of development are put forward to tackle the above problems.
Carbonation Behavior of Concrete in Cyclic Wetting-Drying Environment
Authors: Ma Jun Tao , Shui Zhong He , Chen Wei , Chen Xiao Xing
Published: February 2012

The cyclic wetting-drying environment affects the internal microstructure and durability of hardened concrete. The carbonation behavior of concrete in cyclic wetting-drying condition and standard condition is investigated in this study. The concrete specimens are designed with different contents of mixed mineral and carbonated in different curing condition. The carbonation depth is tested to study the carbonation process in combination of pore structure analysis and microstructural observations. The experimental results show that the carbonation reaction of concrete in cyclic wetting-drying condition proceeds more rapidly. When mixed mineral is added, difference in the curing condition shows less effect on the carbonation behavior of concrete.
Two Algorithms of Getting Inner Grids in Boundary Mesh Search Method for Mesh Generation
Authors: Li Ri , Li Fei , Zhang Jian Qiang , Shen Fa Tian
Published: February 2012

Two algorithms, named Inner Seed Grid Filling Method (ISGFM) and Outer Seed Grid Filling Method (OSGFM), which when generating Finite Difference Method(FDM) mesh, were used to filling or dividing the sort of grids for casting or mold or core, etc, were considered. On the basis of analyzing space relationship between scanning line and casting boundary, two conditions were gained，1) the number of grids crossed by scanning line must be even number; 2) any two boundary grids crossed by scanning line must be not neighbored to each other. On the above discussion, IGFM was constructed. For OGFM, any corner of mesh region can directly regarded as a grain to do filling operation. Comparing these two algorithms, the OGFM can deal with the condition when there were more than two isolated shapes in the same mesh generation region, and showed more priority. Finally, two examples were given.
Influence of Mineral Admixtures on early Shrinkage of Ordinary Concrete
Authors: Zhang Li Feng , Lai Jun Ying , Qian Xiao Qian , Hu De Long
Published: February 2012

In this paper the influence of mineral admixtures on early shrinkage of ordinary concrete with the same water-binder ratio is studied by self-made equipment and CABR-NES deformation instrument developed by China Academy of Building Research Institute. All concrete specimens are cured with one surface exposed to air and others are covered with plastic film. The replacement ratio of mineral admixtures is 10%, 20% and 30%, respectively, and a mixture of a combination of both fly ash and slag is also studied. The results indicate fly ash reducing the early shrinkage of ordinary concrete, and the shrinkage decreases with the increasing of replacement ratio, but the effect is not so significant when the replacement ratio is above 20%. Slag also reduces the early shrinkage of ordinary concrete, and the shrinkage decreases with the increasing of replacement ratio, but the effect is not so significant when the replacement ratio is below 20%. Mixture with a combination of both fly ash and slag has lower shrinkage than mixture with fly ash.
Design Localism on New Tourism Villages — With New Louhe Village as Example
Authors: Zhang Jin , Chen Quan An
Published: February 2012

In this paper, a realistic design case in based on both social and natural realities is studied from the following aspects: tourism planning, overall layout, architecture design, landscape and ecological design, etc. It points out that under the background of globalization and difference between the urban and rural areas narrowing down daily, design of new tourism village in China should base itself on local concepts to integrate factors of culture, land and ecology, etc, so as to give a peculiar answer.
Semantic Network Method of Urban Landscape Design
Authors: Dong Jun , Qi Lin
Published: February 2012

During urban landscape design, both the rational and the perceptual processes is the important stage. According to the characteristics of urban landscape and scheming, the semantic network method is put forward as a tool to solve the more and more complex problems. Because the semantic network is suitable to the characteristics of the human mind and computer, it is possible to assist urban landscape design and scheming for the designer. In this paper, we will put forward an initial idea of semantic network method and discuss how to use this tool.
Application of the Direct-Gain Passive Solar House on Middle and Small-Sized Public Building
Authors: Yang Gui Fang , Guo Ya , Wang Ling
Published: February 2012

This paper starts from research in characteristics of the direct-gain passive solar house and presents the practical significance for the application of the house in small and midsize public building. The concrete methods are illustrated from location selection, external form, internal room arrangement, ventilation and maintenance structure and so on, which clarify the application way of the direct-gain passive solar house in the building. The purpose of this research is to reduce the energy consumption of the building itself and achieve building energy conservation.
Technical and Economic Analysis of BIPV Project in a University Campus of Beijing
Authors: Jia Chun Xia , Guo Yi Ping , Teng Shu Long
Published: February 2012

The campus building-integrated photovoltaic project is introduced in the paper. The installed gross power of the PV system is 470 KW, and its generation index is 173.7 KWh/m2.Compared with the traditional municipal power supply, the unit incremental cost of photovoltaic is 53.5 RMB/W and the cost effectiveness ratio is 1.75 RMB/KWh. However utilization of PV system will save fossil energy, lower pollutions and greenhouse gases obviously.
Ecological Wisdom and Renewal of Jiarong Tibetan Residence in Zhonglu West Sichuan Province
Authors: Li Jun Huan , Liu Na
Published: February 2012

The paper is under the background of residence architecture and Tibetan culture, taking the settlements and architecture of Zhonglu Danba as the object of research, taking architectural culture of other ethnic groups as reference. Inspect the vernacular architecture on the aspects of architecture and culturology, and to conclude the common ecological wisdom in residence construction. The paper also does case study of renewal, revise the traditional architecture aim at the flaws, giving the idea of” excessive growth”, in order to fulfill the demand of local resident.
Shaking Table Tests of a Free-Standing Cultural Relic Strengthened by Plastic Fasteners
Authors: Zhou Qian , Yan Wei Ming , Ji Jin Bao
Published: February 2012

Plastic fastener is a typical strengthening material for museum movable cultural relics in China.To find out strengthening effects of this material,by shaking table tests seismic responses of a ceramic relic in a 1:1 scale showcase model were studied.2 boundary conditions of the relic were considered:free-standing and strengthened by plastic fastener. By white noise excitation basic frequency of the showcase was obtained; by inputting El-centro earthquake waves of different intensities,seismic responses of both showcase and relic were studied,aseismic results of plastic fasteners were discussed. By simulation method finite element models for the showcase and strengthened relic were built,modal as well as time history analyses were carried out to validate the effectivity of shaking table tests.Results show that prominent frequency ingredients of the showcase are far greater than those of the input earthquake waves,thus the showcase is not damaged seriously; for the relic after it is strengthened by plastic fasteners,its peak displacement and acceleration response values decrease,which still embody obviously under strong earthquakes.Thus by plastic fasteners the relic can be effectively strengthened. Besides,simulation results are well in accordance with those of shaking table tests,which proves effectivity of the test method.
The Mechanism of Mineral Admixture in Cement Hydration
Authors: Zhao Mei Li
Published: February 2012

The mineral admixture is one of the indispensable materials for ordinary high-performance concrete. In this paper, the pure cement paste and cement paste replacing by mineral admixture were tested by cement mortar. The SEM analysis of pure cement paste and mineral admixture paste after curing period of 7 days and 28 days.From the picture of SEM after the period of 7 days and 28 days,the cement hydration mechanism was suspected.It could be used for explanating the physical performance and durability performance of the high perfromance concrete with mineral admixture.
Study on the Renewal of New Rural Residential Environment in China from the prospect of Functional Complementation of City and Countryside
Authors: Xue Bin Xia , Zhao Zhi Qing
Published: February 2012

Based on the analysis of the current new rural construction in China and relationship of origin and resource of city and countryside, the tridimensional development of rural residences are proposed to improve the land use efficiency in response to the demand for garden leisure and tourism from city levels in the urbanization process from the prospect of urban and rural complementation and resource optimization. It will thereby convert the industrial structure in the countryside, develop the local eco tourism and relevant service industries and increase the income and employment opportunities of farmers, which can change the quality of rural life and establish the tridimensional development models of new rural residence in China under the mechanism of city and countryside complementation and interaction fundamentally.
The Wind Speed Prediction Based on AR Model and BP Neural Network
Authors: Zhang Cong Lin
Published: February 2012

The output of the wind turbine has high randomness due to natural wind velocity. Whether the output can be predicted accurately or not is directly related to the feasibility of dispatching wind power in the power network. The key of wind farm output prediction is to predict the wind speed of wind farm site. This paper uses AR model and BP neural network to predict 24-hour wind speed, and proves the feasibility of these two predicted methods according to comparison with measured wind speed data. This paper has certain reference significance for improving the precision of wind speed prediction.
Instance Analysis of Steel Reforced Concrete in Soil
Authors: Zhou Li Ping , Ling Yun , Sun Hai Shi
Published: February 2012

SRC (Steel Reinforced Concrete) as a new type of Composite Structure is applied to the design of a soil at wharf to give full play to the advantages such as good stability, good wind and earthquake resistant performance. The capability of applying SRC in soils is proved through Empirical Research. Finally, authors point out the real significance of improving ductility and seismic property by SRC.
Thinking the Green Strategies on Today’s Rural Architecture in China
Authors: Wang Tao , Fan Ling Chao , Wang Fu Rong
Published: February 2012

The article research the characteristics that the old traditional rural architecture work independently, and several problems of present new countryside-construction, which is combined with the future rural intensive management development way, then point out the local green strategies of contemporary rural architecture. Finally, two examples of new rural house are introduced and analyzed, one is rural house built by brick of straw in north-east of china, and the other is Yingjun Xie’s research of light steel structure rural house, which built by the way of collaborative construction.
Algorithm and Experiment of the Separated Foundation Bearing Capacity of Culverts Considering Lateral Fill
Authors: Wang Wen Lu , Cui Shu Jun , Zhao Da Jun , Wang Lei
Published: February 2012

How to determine the foundation bearing capacity of high-stacked culverts in highway construction becomes a problem that must be taken seriously. Combining with the stress characteristics of the foundation soil, the soil force was analyzed for finding the improved effect on the separated foundation bearing capacity of lateral fill. Establishing the calculation model and algorithm, the general formulation of separated foundation bearing capacity considering lateral fill was deduced. Then under direction of similarity theory, six model experiments were designed to simulate the silt clay foundation deformation in whole loading process. The pressure-settlement curves were drew and the foundation bearing capacity under lateral fill height of 0 m, 4 m, 6 m, 8 m, 10 m, 12 m were measured. Test results showed that with the fill height increasing the bearing capacity increased significantly, it had been reached 815 kPa when the fill height was 10 m. But the growth was nonlinear, it first increased from 18.40% to 20.37% and then reduced to 8.59%. At last the bearing capacity reached 885 kPa while fill height exceeded 12 m. Meanwhile the errors between the calculated results and measured by model test were almost less than 10% so the algorithm was feasible. The conclusion is that the lateral fill is advantageous for improve the foundation bearing capacity and reduce project cost significantly when the settlement of the culverts foundation satisfied the design request, with the lateral fill increasing, the rate of the improvement first increases and then decreases, at last it tends to 885 KPa when fill height exceeded 12 m.
The Feasibility Study for New-Type Forging Flange of in Steel Tower
Authors: Qin Li , Miao Yuan , Luo Ya Nan
Published: February 2012

This paper presents a new-type forging flange used in steel transmission towers, that is to forge a same flange and same bolts in large a forging flange, in order to increase the strength and rigidity. This paper seted up finite element models of inner forging flange and outer forging flange. At the same time the article established finite element models of the new-type forging flange and new-type rigid flange used in engineering.The comparative analysis of the results shows that, the new-type forging flanges greatly improved the strength and rigidity of the joints because of the reasonable stress distribution and constraints of deformation.
The Research of Masonry Failure Criterion Based on Orthogonal Anisotropic Strength Theory
Authors: Yang Wei Jun , Li Yao , Jiang Ning
Published: February 2012

A more suitable failure criterion for masonry is built based on the theory of orthogonal anisotropic strength. Several kinds of failure criteria expressions are analyzed and compared and it is shown that the failure envelope based on Hoffman strength theory is in good agreement with the experimental results.
A Study of Microproperties of Historical Brick Material and Qualitative Correlation between Strength and Pore Distribution
Authors: Tang Yong Jing , Yin Qiang
Published: February 2012

Experimental materials in this paper are taken from songyue temple and fawang temple which are both in henan province, X ray fluorescence analysis method is adopted to analysis the chemical ingredients of the historical bricks come from two temples respectively; strength of the bricks come from two temples are compared also; then a model of porous bodies connected parallel is established to reflect the pore distribution of material, the qualitative relationship between strength of material and porosity/pore distribution is derived; mercury intrusion method is used at last to get the porosity and pore microproperties of the historical bricks come from two temples, results show that porosity and microproperties of pores are important factors that affect the characteristics of historical brick material.
Research on Traditional Stone Buildings in West Hunan Rural Areas
Authors: Zhong Ming Fang
Published: February 2012

Stone buildings have long history in west Hunan, stone is one of the most important building material that has been widely used in traditional building, village and town constructions especially in rural mountainous minority areas where rock resource is abundant. Stone is natural and compatible with the environment. Buildings built with local natural stone material in west Hunan minority areas are worth studying considering sustainable development and culture protection. Stone slab masonry in the south with grey limestone slabs and rubble masonry in the north with brown rubbles are two different types. Stone dominates the exterior, while the interior and main structures are built of wood like most of the traditional Chinese buildings. Traditional building techniques are passed on in the stone buildings while they also form the unique culture image of west Hunan rural areas.
Landscape Space Planning on Mountainous Watershed Towns: The Sustainable Exploring Development on Landscape Space of Three Gorges Reservoir District
Authors: Jia Zhen , Cheng Long Fei
Published: February 2012

The paper takes a case for the mountainous watershed towns in the upper reaches of Yangtze River and the traditional landscape space model for the breakthrough point. The author analyzes its natural element, ecological elements, and aesthetic elements, furthermore, has explorative thinking on the continuation and development of the Three Gorges project water storage and fell away to the landscape pattern of traditional space.
Study on Architectural Art of the Former German Governor’s Residence in Qingdao
Authors: Li Shao Hong
Published: February 2012

The Former German Governor’s Residence in Qingdao was by far the most spectacular building in residential architectures on the German Colonial period. This article studied architectural art of the Former German Governor’s Residence from architectural plan layout, building facades decorating, building structures and materials, and made these three respects compare with the Chinese traditional residential architecture. The architectural plan layout was in common about separate house on the German Colonial period, it inherited the German romantic style of the traditional residential buildings since the 16th century; its facades kept different and changeful; but primary and secondary clear, gorgeous, lively and dignified. The architectural structure was brick stone and wood hybrid construction. In this eclectic style of the building could be seen Germany was one of the birthplaces of the Modern Movement, and it had begun to explore using modern materials and new technologies, but its architectural forms was still the old form.
Rare Earth Lanthanum Oxide of Manganese Slag Ceramic Related Physical Properties of Function
Authors: Huang Yuan Ling , Zhang Jie
Published: February 2012

Abstract: By adding rare earth lanthanum oxide on Zunyi area failed comprehensive utilization of manganese slag test, according to a certain proportion to make rare earth ceramics, understanding the effects of rare earth elements on firing, and the influence of the temperature of the compressive, flexural performance and bibulous rate test, the rare earth elements manganese residue to explore the influence of the ceramic certain performance. Sintering temperature from 1220 °C to 1135 °C with the increased amount of rare earth, when the rare earth content is 6% the compressive strength is highest, when the rare earth content is 10% the bending strength is the highest and the bibulous rate is the lowest. It has a guiding significance on the rare earth ceramic materials development in the future, at the same time, providing valuable research material for reducing the manganese slag pile.
Study on Prestressed Concrete Slabs with Lightweight Aggregate
Authors: Mao Ming Jie , Yang Qiu Ning
Published: February 2012

A lightweight aggregate with low permeability was employed in the concrete slab; and the strength of the slab is mainly discussed. The purpose of present study is to evaluate experimentally the punching shear strength of lightweight concrete slab, and to propose the punching shear strength equation for the slab with lightweight aggregate concrete. The applicability of the proposed equation to the both reinforced concrete and pre-stressed concrete slabs with lightweight aggregate concrete.
Application of Nanomaterials in Interior Decoration
Authors: Yu Tian Tian , Hu Wei Ping
Published: February 2012

As new materials, nanomaterials have many properties that are absence in other materials and thus can be applied to various fields. A number of nanotechnology-based products have been introduced into our lives. Nanomaterials have so many advantages. If applied to interior decoration — such as nanoscale glass on interior windows, nanoscale wall paint and nanoscale carpet — nanomaterials will bring changes to interior decoration and convenience to the living environment, while promoting the development of interior decorative materials and nanotechnology.
Effect of Fiber Volume Fraction on Fatigue Crack Propagation Rate of UHTCC
Authors: Liu Wen , Xu Shi Lang , Li Qing Hua
Published: February 2012

Fatigue flexural fracture test is taken out in this paper, to study the fatigue crack propagation rate of ultra-high toughness cementitious composites (UHTCC), as well as the effect of fiber volume fraction on fatigue crack propagation rate. Three fiber volume fractions are adopted: 1.5%, 2.0% and 2.5%. Similar to Paris law, a fatigue crack propagation equation of UHTCC is introduced, as dA/dN=C(△J)m, with the two parameters A and △J are defined as the covering area of multiple fatigue cracks and the fatigue amplitude of J integral. Through experiment and analysis, the fatigue crack propagation rate slows down with the increase of PVA fiber fraction. Furthermore, the influence of PVA fiber on the propagation rate was found to become obvious with the increase of J integral.
Effect of Polymer Latex and Fiber on Properties of Sulpho Aluminate Cement Mortar
Authors: Song Sheng Hui , Liu Fu Tian , Huang Yong Bo
Published: February 2012

Two kinds of polymer latex and fiber are used to improve the physical performance of cement mortar. The influences of the fiber and latex added alone and together on the compressive and flexural strength, toughness, bondability, and compactedness of the hardened mortar were studied, and the modified mechanism was also discussed by SEM and XRD. The results showed that both of the latex and fiber can improve the compressive and flexural strength of mortar in low content, decrease the porosity, improve the toughness and bond flexural strength significantly, and delay hydration process of cement mortar. The effect of fiber-latex added together was better than that of two matters added separately. The optimized components for fiber-latex hybrid were: ACE12% + PVA1.6 kg/m3.