bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence of the K Values and D Values on Heat Insulation Performance of the Wall
Authors: Yu Yi Wen , Liang Zhi Yao , Yan Jun
Published: May 2011

The heat transfer coefficient K value and The thermal inertia index D value plays an important role in wall insulation performance. This paper use the palisade structure of the thermal performance analysis and evaluation program K-value which developed by Chinese academy of sciences, taking Changsha area climate condition as an example ,to simulated and analyzed the hypothesis single wall material and the composite wall. So we can obtain the K value and D value on the wall insulation most effective value range.
The Application of Ecotect in Architectural Design
Authors: Liang Zhi Yao , Yan Jun , Li Sun Min , Guo Hao
Published: May 2011

With the rapid development of China's economy and the increasingly serious energy issues, ecological architecture design is becoming more and more important. The article described in detail about the use of Ecotect in ecological architecture design through the method of case study, and extract a strategies of great significance to ecological architecture design.
Evaluation of the Optimum Index of Target Analysis for Rural Residential Building Products
Authors: Liu Tian Bo , Luan Fang Jun , Wang Shou Jin
Published: May 2011

The quality of rural residential building products related to the construction pace of new socialist countryside in China. In order to improve the products quality, the optimum index of target analysis is used here. Analyzed and established the evaluation hierarchical model for the rural residential building products, using the optimum index of target analysis to evaluate the quality of the product, the concrete steps is given with the examples, obtained the quantify the quality of evaluation value. Compared with the other evaluation methods, the evaluation of the optimum index of target analysis has the feature of Intuitive, simple, quantitative, precise, and has greater application value.
The Application of Architectural Technology in Architecture Planning Optimization
Authors: Li Yun Jiang , Ye Jun , Fan Bo , Xu Jin Dan
Published: May 2011

By use of architectural technology theory and simulation software, several environment parameters of a plan of a residential district have been simulated. According to the results obtained, the initial plan of the residential district has been optimized to meet the relevant green building requirements.
Study on the Evaluation Standard of Ecological Residential Area Acoustic Environment
Authors: Wang Ya Ping , Sun Ming Xia , Gai Lei
Published: May 2011

The acoustic environment is an important part of ecological residential area environment. It is one of the important evaluation indexes of environmental quality. The paper has analyzed the elements of ecological residential area acoustic environment and proposed the evaluation standard of ecological residential area acoustic environment. It could lay a theoretical foundation for the ecological residential area acoustic environment design.
Steel Beam-to-Column Connections Using Martensite Shape Memory Alloys
Authors: Wu Zhen Yu , He Xiao Hui , Zhang Yao Chun
Published: May 2011

The hysteretic performances of steel beam-to-column connections using martensite shape memory alloy (SMA) rods were studied by the experiments. Before the connection test, the material test of Ni-Ti SMA was carried out for the verification of shape memory effect. Meanwhile, the other two type connections (ANGLE and A3) were also tested for comparison. The results showed that connections with SMA rods have excellent energy dissipation capacity, and no strength degradation even subjected to relative rotation of 0.04 rad. It was found that connections with SMA rods possess the higher stiffness and strength than the ANGLE connection, and better ductility than the A3 connection by comparing their hysteretic curves. Large residual deformations of SMA rods can be recovered by application of heat. Retests were performed using heat-straightened rods in the connections, and nearly identical hysteretic behavior was observed as in the case of initial testing.
Analysis of the Elements of the Urban Context
Authors: Li Gang , Wu Shi Gang
Published: May 2011

The aim of this study is to fine out urban context factors and analyze them, so that its developing can continue. Furthermore, through analyzing the four factors: natural environment, urban architecture environment, region civilization and technique, and discover the content and characteristic, grasp the connotation of urban context. It will provide service for city designing.
Residential Design Idea - As a Case of Xinyang Greentown Estate in Mudanjiang
Authors: Yang Li
Published: May 2011

This paper takes the planning scheme of Xinyang Greentown Estate in Mudanjing as an example and studies the modern theory of human settlements. Meanwhile, we start the plan with general plotting, designing and planning, and architectural design. We also focus on creating humanized living environment, the harmony between commercial and residential buildings, and the separation of noise and silence. Then we use Air-pak to simulate the wind environment after the completion of it, and it fills the blanks of wind environment research of estate planning. Under the guiding principle of “people oriented”, the target of estate planning is to establish the mechanism which makes different functions of the estate run-in synchronism. In order to build a civilized, comfortable and healthy estate, it is necessary to follow the guidance of sustainable development strategy to meet people's increasing material and spiritual needs. Along with China’s economy development and the improvement of people’s living standard, people’s environmental awareness is becoming stronger and stronger, and the requirements of living environment is becoming higher and higher. After meeting with the basic material needs, people will begin to pursue a higher level of spiritual needs. Which embodied in residence is that the initial pursuit of shelter gradually transforms into the pursuit of a higher level of ownership, respect and value realization. Today high-quality living environment is the noble pursuit of modern living, and estate planning is directly related to the quality of living environment. This paper takes the planning scheme of Xinyang Greentown Estate in Mudanjing as an example and conducts some initial research on the improvement of the quality of living environment in various aspects.
Some Thoughts on the Development of Digital Technology in the Construction Industry
Authors: Yang Li
Published: May 2011

The influence of digital technique to construction industry has become more and more great. Current digital technique has transformed from the stage of “Computer-aided Drawing” to the stage of “Computer-aided Design and Analysis”. In recent years, along with the statement of construction information model and life cycle management of construction engineering concept, the digital technique penetrated the entire process of building program from project design, expand at the beginning of design, construction drawing design to the construction. The development and appliance of digital technique in construction industry were summarized. The digital technique’s development in future construction industry was also forecasted.
Structure Analysis of Xuanfu in Ming Dynasty
Authors: Wang Lin Feng , Guo Yu Li
Published: May 2011

This paper picks Xuanfu one of the military towns in the “Nine frontiers” as an example to research the defensive space along the Great Wall of Ming Dynasty. Analyzes space-defensiveness of Xuanfu town from some different points of view, such as the stratagem intention of location、function setting、urban form evolvement and spirit imago. Analyzes the historical causes of the town’s space, summarizes the space characteristic of military town a typical type of urban form and the influence of the special history background.
An Structural System Reliability Calculation Method Based on Sample’s Weighting -Artificial Neural Network
Authors: Chen Wei Min , Yang Zhi Gang
Published: May 2011

This paper presents a new structural system reliability calculation method with artificial neural network adopt by the sample’s weighting and the artificial neural network, which can greatly reduce calculation work. Firstly, according to the reliability theory of total probability, with the concept of sample’s weighting coefficient, the minimum sample size can be obtained according to the numerical characteristic values of random variables and the minor sample t-distribution estimation under a certain expected value. And then, the optimize artificial neural network is set up with the limited training samples based on the analysis result of sample’s weighting coefficient, which has a highly nonlinear mapping relationship between the efficacy and response of the structural system reliability Analysis. By making use of the generalization capability of optimize artificial neural network, sufficient system response value is gained at random. Meanwhile, the weight coefficients of the random sample combinations are determined using the Bayes formula, and different sample combinations are taken as the input for system analysis. According to one-to-one mapping of system by artificial neural network between the input sample combination and the output coefficient, the reliability index of system can be calculated. At last the method provides a new attempt for S structural system reliability analysis and prove to be feasible and effective for practical experience in complex system, which not only makes the artificial neural network calculation more effective based on sample’s weighting coefficient, also makes full use of the merit of artificial neural network instead of the performance function.
Landscape City: The Ideal Direction of Cities Development of 21st Century in China
Authors: Ye Ping , Wu Liu Qi , Wang Duo
Published: May 2011

Landscape city is a new concept of city construction which is proposed by Chinese famous scientist Qian Xuesen.It contains many factors such as garden、culture、art 、technology . Landscape city covers the western modern urban theory, and at the same time Chinese culture connotation, it stands for 21st century Chinese socialist urban development ideal direction. In the early of 1990s, one of the famous scientists of China, Professor Qian Xuesen proposed the concept of landscape city, and it embodies Qian’s deeply expectation that the cities in the 21st century are landscape cities. What is the landscape city? From Professor Qian’ 68 pieces of articles, letters and interviews, we can conclude a formula that is: Landscape City = Garden City + culture city + art cities + modern technology city. Our cities have different natural and geographical conditions and also have different society function. But for most of them, should set landscape city as their development goal, this should be the Chinese nation’s noble ideals of the living environment in the 21st century.
Discussion on the Distribution of Geothermal Resources Related to Urban Planning - Taking Dongying City, Shandong Province as an Example
Authors: Li Zuo Long , Yu Hui Yang
Published: May 2011

This paper contrasts the distribution of geothermal resources with urban planning, analysis that energy is an important problem when urban development faced various difficulties currently. Geothermal energy as one of the options offers a better solution to this problem, if the development of geothermal resources is in close integration with the urban planning, it will have significant economic, social and environmental benefits. This paper takes Dongying City as an example in-depth analysis. The development of geothermal resources is in close integration with the urban planning.
Research of City Ecological Green Space Design Base on CITYgreen
Authors: Li Xin , Wei Ya , Li Liang
Published: May 2011

In this paper, by the method of GIS and RS, according to the field survey, ecology benefit of the trees in the study area was calculated by CITYgreen. The necessity and importance of the introduction of CITYgreen into city ecological green space design have been also discussed in order to make our city planning more efficient, ecological and sustainable.
Ecology Community Construction Based on Low-Carbon Idea
Authors: Zhao Chun Rong , Zhang Ying
Published: May 2011

The low-carbon urban construction is an important carrier of the energy saving and emmission reduction,which will lead to an new trend of future city construction.while regarded as the important component of low-carbon construction, low-carbon ecology community will promote city sustainable development. And it is characteristic of the naturalness, economy and sociality. Based on present situation of chinese ecology community construction, some strategies are presented, incuding that the first is urban planning at macro-level; the second is spatial plan, transportation system, service facilities and green space system at medium measure; the third is water environment plan, energy plan, architectural design from at micro level; the fourth is community housing structure and public participation from social policies.
Residential Design of Circular Economy
Authors: Yuan Min , Pan Bing Yu , Wang Shi Jun
Published: May 2011

Residential Design briefly explained the relationship with the circular economy, according to the design of residential status and future growth prospects, I propose the idea of circular economy design residential areas, construction of new cycle of economic-type settlements, to develop eco-energy saving residential area.
Urban Growth Management: Approaches, Experiences and Implications to China’s Urban Planning
Authors: Zhang Zhen Long
Published: May 2011

Chinese cities expanded and developed at an astounding rate of growth during the past three decades. The consequence rise in exorbitant consumption of land resources and the impacts on the environment were recognized accordantly. Urban growth management, as one of the effective approaches to solve the problems caused by urban sprawl, has become a subject for broad discussion in the field of urban planning in the world. It is necessary to shape a union framework of growth management between national and local government. And it is recognized that these urban growth management decisions must be made in a more comprehensive and consistent intergovernmental manner. The purpose of this study is to contribute to current planning thought and practice by providing some insights into how urban growth management can be utilized to contribute to a more sustainable urban future in China.
The Research on the Issues Concerning the “Stub-end Type” Spatial Development
Authors: Zhang Jun Min , Xu Yan , Chen Shu Fei
Published: May 2011

The “Stub-End Type” Residential Area is a special community, which is characterized by its position that is located in the end of a direction in a city and the single direction, from which its residents go out. After seeing its location, surroundings et cetera and its advantages, we found that such settlement has not been rationally and orderly made the best use of by using the external conditions. On the contrary, serious problems and disadvantages have emerged conspicuously. In this paper, by citing an example of the southern settlements in Jinan, combined with the factors of its geographical location, natural surroundings and geological conditions, we’ll talk about the motives for “Stub-End Type” Spatial Development and relevant solutions and means from a professional point of view to have healthy and harmonious development of Stub-End Type Residential Area.
Study on the Ecologically Sensitive Tourism Development of Suburban Scenic
Authors: Huang Yao Zhi , Zhou You Jun , Wang Yin Sheng
Published: May 2011

This paper aims at solving the development problem between the inner ecological sensitivity of scenic and the its exploitation given by the city. In this paper, by taking the master planning of Dragon mountain scenic for example, we propose principles of dynamic progressive development, also we try to find Series of develop Strategies to achieve the goal which scenic goes well with the development of city
New Scenes with Old Memories in Tokyo and Changed Scenes with no Memories in Fu Zhou
Authors: Xu Cong Huai , Zhang Xiao Hui , Fan Hai Qiang , Xu Shu Chen
Published: May 2011

The construction of the cities in China is under rapid development. Large-scale construction and renewal cut off the trace of city history - our cities are losing memories, whereas the city renewal of Bunkyo Ward in Tokyo post-War is in “transition in harmony with natural and historic surroundings", which can bring happy memories to people everywhere. This paper collected historic photos of the main streets, views and spots in Bunkyo Ward in the last 50 years, and take many new photos at the same place. In comparison with old views, we can still see some sparse and existent vestiges, misty archaic rhyme through the new building and the view. Which in contrast, in the Central 817 Road in Fuzhou. From the comparison between present and past since the 1980s, we can figure out: the urbanization in modification process treated the old city in another attitude which leads to another results: Changed Scenes with No Memories.
Researches on the Status and Problems of Conservation of Modern Relics and Representative Buildings
Authors: Bai Ning , Wang Rong
Published: May 2011

Excellent buildings in different period recording city memory in different phases, they are connected up and irreplaceable respectively. As the important part of cultural heritage, modern relics and representative buildings pass historical information authentically and play a crucial role in providing historic witnesses. They are carrying a large number of Chinese history and culture sequentially ranging from the Ming, Qing Dynasty, Republic of China, the early days of New China, the Cultural Revolution period, the Opening-up Reform to contemporary times. They are either relevant to the major historical events and people, or occupy a certain position in the history of urban development. They are the sections of complete chain of history and culture. Nevertheless, they’re hardly shown on the list of “preserved heritage”. Concurrent with the construction of city, a large number of excellent modern buildings are suffering from demolition and destruction for they were young. Because of our lack of conservation consciousness and actions, many of them are in a devil of hole fragmented. The partially neglect of the conservation of modern cultural heritage is bound to cause the rupture of our tradition and blankness in memory. It is an increasingly urgent trend to save and protect these building heritages without any delay. This paper attempts to discuss the problems of modern relics and representative buildings conservation and improvement of conservation system.
Studies on the Land Development Intensity Model of Cities Based on the Concept of Land Grading
Authors: Li Xiao Long , Wu Yang , Huang Ru Qin
Published: May 2011

This article complies with the own economic discipline of urban land and studies relevant experiences at home and abroad systematically. The article takes Chinese High-Tech Industrial Development Zone in Ankang city as an example. The authors explore that how to apply the concept of land grading in the process of urban planning, in order to guide planners to fully grasp the land qualities and rationally determine the intensity of land development.
The Initial Exploration of Strategy about the New Urban District Development and Construction with the Concept of Low Impact Development - With the Example of Hujia New District, Panshan County, Liaoning Province
Authors: Dong Shi Yong , Wang Ying Ying
Published: May 2011

With the rapid development of economy and the speedy process of urbanization, many new districts have been developed to meet the needs of urban development. However, for pursing the speed of construction and economic effectiveness, the effectiveness of ecological environment were ignored, which led to the result that the environment of original ecology and natural resources were damaged and shocked severely in the process of new urban district development and construction. As the philosophy of development which emphasizes natural coexistence, Low Impact Development is the reflection to achieve sustainable development, green city, and ecological city. With the development of the principle of Low Impact Development and the example of Hujia new district, this paper will study the strategies about ecology, economy, and traffic of new urban construction with the principle.
Systematic Planning of Pubilic Art in Suzhou-City
Authors: Huang Yao Zhi
Published: May 2011

Urban sculpture works is a huge system what include the level, the sequence structure when you examines carefully from the plan angle, therefore the urban sculpture system planning is a special plan in the level of master plan. The research of suzhou sculpture system plan has been clear development idea of city sculpture and analyzes he control essential factor based on the urban public space resources and refined the subject and the theme from Suzhou region characteristic through the plan experience of our cities’ sculpture development and the plan. The urban sculpture system has a distinctive style, and the extremely rich feasibility of the plan implements and manages.
Building Pleasant Landscape of Urban Plaza
Authors: Yan Fang , Liu Ji Peng , Zhu Xiao Juan
Published: May 2011

After sorting and analyzing the plaza design of Martha Schwartz, to discussing contemporary landscape design of urban plaza. The author focus on the LA’s character, some new ways and means are put forward to solve landscape design of urban plaza problems, and an explicit design orientation is given out to discussing the theory and methods appropriate for the basic conception “Taking man as the center” in contemporary urban design.
Creation for Urban Landscape to Improve Ecological Environment - Turn Urban Idle Land into Landscape
Authors: Zeng Ming Ying , Xian Qing Song , Zhang Ying
Published: May 2011

Land resources is becoming more and more precious with the fast speed of nation-wide urbanization ,so it’s a great waste not to use the idle land .Thus many cities are considering new policies to make idle land useful[1]-[5]. This article aims at suggestions for Land and Resources Bureau and Planning Department from the landscape angle.
Landscape Design of Urban Green Space Adaptive to Global Climate Change a Review
Authors: Zhang Jian , Sui Yan Hui , Geng Xue Biao
Published: May 2011

Low-carbon city provide both opportunity and challenge for landscape architecture. Urban green space planning and design are the most important way to achieve the landscape adaptive to globe climate change. In this paper, we introduced importance and significance of urban green space in low-carbon landscape, and reviewed many new design solutions, such as construction of green infrastructure, protection of natural vegetation and ecosystems, use of phytoremediation and application of urban productive landscape. Via innovative design solution and ecological principle, landscape architects would create a substantially new aesthetics to ensure the survivance of humanity.
The Strategy for Plants Uses in the Construction of Conservation-Oriented Landscape
Authors: Kong Yang Yong
Published: May 2011

As one of the four landscape elements, the plants were very important to the landscape quality. According to the needs for construction of conservation-oriented landscape, this paper indicated some problems and faults existed in the uses of landscape plants currently, such as the open lawn with less comprehensive effects, pursuing to transplant big trees and exotic plants for feature, etc., based on the introduction to its status and importance. Then, three-point strategy was put forward for proper uses of landscape plants and improvement of the whole landscape construction.
The Research of Economic Evaluation Model for Construction Conserves Energy Retrofitting Technology of Existing Buildings
Authors: Xing Guo Qi , Wang Wei Wei
Published: May 2011

In the established model of economic evaluation, it considers the impact of construction conserves energy elements of existing buildings and adopts payback period of dynamic energy as the evaluation criteria. It proves that the model has practical value by using DeST-h software to simulate building energy consumption of existing buildings and retrofitting buildings.
Analysis of Unconfined Compressive Strength Calculation Formula of Soil-Cement
Authors: Wang You Xi , Ma Jun Qing
Published: May 2011

The soil-cement is applied in hydraulic engineering, construction engineering and highway engineering. It needs take much time and energy to do the experiment of soil-cement design, because the influence factors of soil-cement unconfined compressive strength are many. The study is based on the former experimentations, and quantitative analyzed relationships among soil-cement unconfined compressive strength, earthiness, cement mixing amount and curing time by nonlinear curve fitting. Then, rational experience formula is given in this paper. It is tested in Nantong Building foundation excavation project, and the result proves that formula is practical.
The Implication of Solar Hot Water System in Small High-Rise Buildings
Authors: Cao Hui , Liao Qiu Yang
Published: May 2011

It introduces small high-rise building concepts, discusses the calculation of solar hot water system, which includes the collection of raw data, the determination of solar collector area, the size of heat storage water tank and hot water system type as well as summarizes it as a reference for engineering design.
The Study of Information Asymmetry on Construction Market in Towns and Villages Energy-Saving Housing
Authors: Liu Ge , Huang Ming Qiang
Published: May 2011

Based on the view of construction market in towns and villages energy-saving housing in China, combining the theory of information asymmetry, this paper will analyze the reasons of information asymmetry existing in construction market of towns and villages energy-saving housing and investigate the problems of information asymmetry and adverse selection between the real estate developers and residents. Referring to the advanced experience from abroad, it can be argued that establishing an appropriate building energy-saving technology evaluation index system is an effective way to solve market failure in towns and villages housing market.
The Mode by Combining into Development of Underground Space and Protection of Cultural Relics - In the Famous Historical City of Luoyang as an Example
Authors: Sun Yue Jie , Dong Gao Jian
Published: May 2011

Protection of historical and cultural sites and exploitation of underground space became the two important weights on both ends of the modern Luoyang urban development scales. This essay is about the mode by combining into development of underground space and protection of cultural relics. Three aspects have been analysis by citing examples.
Survey and Analysis on the Residential House Energy Consumption in Wuhan City
Authors: Ye Jun , Li Yun Jiang , Zhou Bai Ling
Published: May 2011

Based on the data from research on the energy consumption of Wuhan City families, surveyed the relationship among the family structure, family income, measurement of heating, and air conditioner usage; pointed out the exit problem of that city’s family energy consumption and proposed some solutions; offered the theory basis for future construction energy-saving improvement.
The Applicability of Shading Technique in Energy Coefficient Building of Sichuan Rural Seismic Disastrous Area
Authors: Li Xiao Ning
Published: May 2011

On the May 12, a huge earthquake occurred in Sichuan Province, and causing tremendous damage. There are 5,401,900 housing collapsed and 5,932,500 severely damaged, and the large number of them should be reconstructed urgently. In the planning and redevelopment of housing for rural residents amounted to 3,500,000 units only in Sichuan. The surveying of post-disaster reconstruction by writer indicating, the buildings of residential in Earthquake-stricken villages and towns are constructed in lower standard than those in city. Single-layer and two-story stand-alone home is the main type of the rural traditional housing. The existing housing in rural areas did not take energy-saving into account, and the vast majority of them cannot meet the minimum level of energy-saving. There will be a good opportunity to promote the energy-saving technique in post-disaster reconstruction in rural areas. Based on the command of building energy-saving design, and combined with climate and geographical characteristics in Wenchuan quake-stricken, the outer blinds system proposed in the energy-saving design of the rural residential post-disaster reconstruction. The outer blinds system is one of traditional architecture techniques. The adjustable sun visor can all be found in the Ming and Qing Imperial Palace and the receiving chamber. But at present, the outer blinds system can be little taken into account in the buildings by local architects and designers. The paper based on energy-saving effect, shade materials, and the service life and initial investment; explored the applicability of outer blinds system in rural areas post-disaster housing construction, and put forward solutions and technology roadmap. The results showed that the shade outside technique has such characteristics like low cost, effective and simple. There are strong applicability in the rural residential post-disaster reconstruction. The paper also analyzed the shade outside technical problems in order to provide some references in post-disaster reconstruction.
Dongtan vs. Masdar: A Tale of Two Zero-Carbon Cities
Authors: Zhao Ji Long , Kong Ya Wei , Liu Chang An
Published: May 2011

Based on the background of the environment and climate change today, this paper elaborates the meaning and approaching method of zero-carbon city. Furthermore, by the contrasting and analyzing of eco-cities, for example Dongtan in Shanghai and Masdar in Abu Dhabi, the design strategies are summarized for zero-carbon city.
Kang Bai-Wan's Mansions from the Ecological Perspective
Authors: Zhang Hua
Published: May 2011

Kang Bai-wan’s Mansions is one of the three famous landlord manors in China; it is located at Kangdian town in Gongyi city, Henan province; it is a large architectural complex built in Qing Dynasty. This paper will research on the general layout, courtyard environment and cave dwelling building of Kang Bai-wan’s Mansions from the ecological perspective, to explore the ecology philosophic thought and local structural techniques contained in the traditional Chinese architecture and to point out that the combination of tradition and modernity is the main road for the Chinese ecological buildings development.
Green Construction Evaluation of Wall Project Based on Grey Clustering Method
Authors: Luo Qian , Li Na , Shi Meng He , Liu Qi
Published: May 2011

At present, there’s unbolt independent system of green assessment concerning construction process, let alone a sub –part engineering. In this paper, based on grey clustering method and evaluating model of green construction studied previously, the evaluating index system of green construction is proposed with the addition and deletion of indexes in term of wall project. Finally, methods of evaluation will be applied to the two actual engineering schemes for evaluation. The conclusions will be compared, showing the method is more feasible.
Study on the Impact of Aggregate Size to SCC Segregation
Authors: Zeng Li , Zhang Yan Hua , Gao Zhen , Tu Er Hong
Published: May 2011

There are many factors affecting segregation of self-compacting concrete, and one of major factors is aggregate size. Based on the application of Stokes law to analyze aggregate segregation, ball-drop paste viscosity measurement has been used in the research that segregation degree of aggregate of various particle size in paste of identical paste consistency and the relationship between aggregate size and paste viscosity when concrete mixture reach the same fluidity in this article. It shows that aggregate segregation rapidly grows up with the increase of aggregate size and in order to reduce aggregate segregation, paste viscosity should be increased correspondingly under identical fluidity; as the aggregate size comes up to a certain degree, the growth of paste viscosity speeds up obviously, for the sake of maintaining the fluidity, paste should be increased; there is a sudden change in the growth course curve that paste viscosity increases with the aggregate, from the perspective of aggregate segregation, the part before the change has been approved to be a reasonable size range of the aggregate.
The Analysis of the Impact of the Louver on the Natural Ventilation
Authors: Wang Yi , Lu Pan , Yao Hai Bing , Liu Jia Ping , Chen Lu Lu
Published: May 2011

The louver affects natural ventilation rate and indoor air distribution. In this paper, the wind velocity profile and pressure distribution in the natural ventilation model building were simulated through CFD. And how different rotation angles of the shutter and different incidence angles of the wind affect natural ventilation rate were studied. Then, the influences of shutters on the discharge coefficients were analyzed, and use principles of the louver equipped in the building were proposed.
The Influence of Different Restrained Boundary Conditions on the Stability of Steel-Concrete Composite Ribbed Shell
Authors: Chang Yu Zhen , Wang Ling Ling
Published: May 2011

The steel-concrete composite ribbed shell is a new type of spatial structure. Different restrained boundary conditions have a considerably influence on the ultimate bearing capacity and stability. Based on the nonlinear finite element method, a numerical model is made by finite element analysis software ANSYS, in which material and geometrical nonlinear are considered. A spherical composite ribbed shell with 40m span, three different section dimensions and two different vector heights is used as an example, in which 4 different restrained boundary conditions are considered, including all fixed, all hinged, node fixed and node hinged. The results show that when the section dimension and span height are the same, the ultimate bearing capacity will be greater as the boundary becoming rigid, and when the section dimension is larger, the ratio of ultimate bearing capacity under different restrained boundary conditions is increasing, while as the span height is greater, the ratio is decreasing. To the instable shape, the influence of different restrained boundary is minor, all the instable modes are extreme point instability, but the trend of load-displacement curves are almost similar, and when the cross-section dimension of composite rib increases, the composite ribbed shell under different boundary constraints has shown higher post-buckling strength.
Analysis Application Research of an Improved Value Coefficient Method in the Scheme Optimization of the Existing Building Energy Saving Reconstruction
Authors: Wang Yong Xiang , Xie Li
Published: May 2011

The paper aims to provide a new way for energy saving reconstruction scheme optimization.In order to seek the most reasonable and scientific energy saving reconstruction scheme for the existing buildings.The writers introduce an improved value coefficient method.In the method,the triangular fuzzy number is employed to determine the weights of the function sub-indexes.The paper also proposes that the cost coefficient should adopt the annual value of the life cycle cost.And then the writers establish a corresponding analysis model and offer a detailed elaboration on its application based on a project case of existing building energy saving reconstruction.
Energy Consumption Profile of Hotel Buildings in Chongqing
Authors: Liu Meng , Huang Chun Yu , Cheng Qun Ying
Published: May 2011

14 hotels were selected in Chongqing for energy consumption profile analysis. And all of the hotel buildings are high quality hotels with 3-star or above. Due to the extremely local climate, the energy demand on heating and cooling is dominant in the total energy consumption. From the analysis, it is found that heating in winter accounts for more than half of the fuel use and cooling in summer is for around half of power consumption. Moreover, the chillers, pumps and terminals are responsible for one third of HVAC energy consumption respectively. As estimated from the samples, the energy consumption index of Chongqing hotel buildings is between 107 and 155 kWh/m2.
The Visual Expression in the Shape Design of Ecological Architecture
Authors: Sun Xiao Ming , Li Jian Hong
Published: May 2011

Because of environment deterioration and energy shortage during urban development, the ecological condition of the human environment gets attention. Developing the ecological architecture greatly becomes necessary. The rationality of ecological architecture represents not only in technology advancement and energy saving, but also in aesthetic standard, whose importance surpasses the former, in some sense. In this paper, it is analyzed on aesthetic variation, constitutive way and visual expression of the shape design of ecological architecture to support the research of the visual expression in the shape design of ecological architecture in theory.
Analysis on Progressive Collapse Resistance of Reinforced Concrete Frame Structures
Authors: Xiong Jin Gang , Zheng Yon Kang , Cai Guan Min , Li Yan
Published: May 2011

In this paper the analysis is conducted to investigate the progressive collapse resistance of typical reinforced concrete(RC) multi-story frame structures, which are designed according to the China code for seismic design of buildings. The analysis results show that the progressive collapse resistance will be enhanced with the seismic fortification intensity increasing. The progressive collapse resistance of RC frame structures with low seismic fortification intensity are poor. This implies that as for RC frame structures with low seismic or non-seismic demand, close attention must be paid to continuity and ductility in order to prevent progressive collapse.
Design of Long-Span and Wave-Shaped Steel Canopy Structure of Ningxia Helan Mountain Stadium
Authors: Yang Wen Wei , Wang Xiu Li , Wang Dan Dan
Published: May 2011

Ningxia Helan Mountain stadium the bottom grandstand of which is steel reinforced concrete frame shear wall structure, the top canopy of which is space steel truss structure system. Using SAP2000 (V9.1.6 version) and MIDAS (V7.1.2 version) software, to have an elasticity check analysis to the overrall structure. Discussion the vibration characteristics and seismic performance of the stadium steel canopy; According to computing and analysising the model, taking normative inspect, the consequence show that the structure can meet the bearing capacity, the stress ratio of the majority position are not more than 0.7, and the stress ratio of force greater position are about 0.95. This wave-shaped canopy structure is excellent, is good to the applicability of architectural form, and can be as a reference for the similar stadium.
Seismic Performance Analysis of Steel Reinforced Concrete Frame-Concrete Core Wall Structure
Authors: Li Qing Ning , Liu Qing Mei , Zhao Lin
Published: May 2011

A steel reinforced concrete frame-concrete core wall structure is taken as the research object in this paper. The whole space finite element models are established by software ETABS, modal analysis, response spectrum method and elastic time-history analysis are conducted. And static elastio-plastic time history analysis of the high-rise structure is conducted by software MIDAS/GEN. Seismic response of the high-rise structure is analyzed under medium earthquake and rare earthquake , elastic deformation is calculated under conventional earthquake and elastic-plastic deformation is calculated under rare earthquake. The results show that the structure can meet the requirements of no-damage under light earthquake, repairable under medium earthquake and no-collapse under strong earthquake.
Analysis and Study of Construction Measures for Restraining Concrete Rust Expansion Crack
Authors: Peng Li Ying , Wei Jun , Wu Peng Yu , Wang Teng
Published: May 2011

Started from structure construction ,this paper carried out numerical analysis about the test members through computer simulation and studied the influence of cover thickness and stirrup spacing on the rust expansion crack by means of rapid electrifying for accelerating the corrosion of longitudinal reinforcement. Based on this, it established the correlativity between member surface stress and concrete cover thickness, stirrup spacing. And this paper found the influence law of cover thicknesses and stirrup spacing on rust expansion crack on specimen surface.
Temperatures Measurements in Reinforced Concrete Shear Walls
Authors: Liu Gui Rong , Qu Fu Lai , Song Yu Pu
Published: May 2011

Ten reinforce concrete (RC) shear walls were exposed to fire on one side. A time-temperature fire curve with a heating phase and decaying phase was used in order to simulate a natural fire. The effects of fire duration and load intensity are described in relation to the distribution of concrete temperature. Test results show that load intensity has little influence on the concrete temperature distribution. In contrast, peak temperature in the same depth is strongly affected by the fire duration.
Numerical Simulation of Cold-Formed Steel Stiffened Lipped Channel Columns with and without Perforations
Authors: Wu Zhen Yu , Yao Yong Hong
Published: May 2011

A nonlinear finite element model of fixed ended cold-formed steel stiffened lipped channel short columns with and without perforations was developed and verified against experiment results. Material and geometrical non-linearities were included in the finite element model. It was proved by comparison analysis that using weighted average tensile yield stresses of the flat and corner areas and the mean geometrical imperfections along the length of the specimens was suitable for predicting the failure mode, ultimate load and load versus displacement curves of the channel short column. The results got by FEA coincided with the experimental results.
Brief Analysis on the Mechanical Behavior Influenced by Opening Locations of the Unbonded Prestressed Concrete Slabs
Authors: Jin Ling Zhi , Zhou Hong Mei , Fu Qiang , Zhou Xiao Jie , Xie Yu Lin
Published: May 2011

The unbonded prestressed concrete slabs is usually used in big span high-rise buildings. Due to the existence of stairs, elevators, piping shafts and washroom etc，（hole drilling is usually encountered in the floor of unbonded prestressed concrete structures）, which weakens the rigidity of concrete slab, and it has different influences on the slabs with openings in different locations. Based on the contrast experiments of the unbonded prestressed concrete slab with openings in different locations subjected to uniform load, this thesis investigates and analyzes mechanical behavior of the unbonded prestressed concrete slabs with openings in different locations (central，around edge and corner) subjected to uniform load. Using the yield-line theory to calculate the ultimate bearing capacity of pre-stressed slabs with openings, and comparing from experimental results to theoretical ones, this paper puts forward some conclusions of how different opening locations impact the ultimate bearing capacity of pre-stressed slabs with openings
CFD Analysis of Performance of a Reconstruction Plan of Smoke Control System in Metro Station
Authors: Yan Shu Xia , Wu Xi Ping , Wang Dong
Published: May 2011

There are plenty of pipes to be arranged in subway station platform. Optimizing the air-conditioning system ducts is especially important because of its large size. Due to the location of stairs and the size of ducts, the platform exhaust ducts of a Shanghai subway station were laid out within the range from the stair to the end of the platform which probably can’t exhaust smoke effectively in fire. In reconstruction plan, air supply ducts and discharge ducts are connected and valves are added. Air supply pipe can be changed into discharge duct by controlling the valves. The smoke extraction performances of the original plan and the reconstruction plan are analyzed with the CFD numerical simulation. The results show that the reconstruction plan can make up the shortcoming of the original plan and contribute to the layout of pipes in new platform.
Safety Management and Insurance of the Construction Projects
Authors: Kang Xiang Ping , Feng Ning
Published: May 2011

The insurance is the valid means which transfers engineering risk, but applied very limited in our country. The present condition of the construction engineering insurance and the factors restraining its wide application are investigated. The investigation results indicated that the main factors restricting the development of construction engineering are various. The knowledge to insurance is not enough, or the fluke mind is existing. The contractor is inactive to insure. The owner regards the insurance as compulsive request of the government and the bank and has to fulfill it.
Parametric Analysis of Bearing Behavior for Curved Box-Girders of Large Span Steel Structure
Authors: Hu Zhong , Ding Da Yi , Wang Yuan Qing , Liu Li Yuan , Wan Hai Ying
Published: May 2011

The curved box-girders of Hefei Xinqiao International Airport Terminal were taken as a background of this article. Aiming at the type of the cross section, thickness of the steel plates and curvature of the beam axis, parametric analysis was carried out to evaluate the ultimate bearing capacity of this kind of curved box-girder. Using the finite element analysis software ANSYS, the effects of former three parameters was calculated. From the results, it could be found out that the ultimate bearing capacity increases as the section aspect ratio grows, and it increases linearly as the thickness of the flange and web plate grows. In addition, the ultimate bearing capacity increased and decreased with the increment of the curvature of the beam axis R. The finite element results provided a theoretical basis for experimental research and analysis of the local models provided reasonable suggestions for design as well.
Dynamic Response of RC Column with Different Constraints under Blast Load
Authors: Hou Yan Li , Jiao Yu Feng , Wei Xue Ying
Published: May 2011

The failure of the reinforced concrete (RC) column on the ground floor may result in progressive collapse of the whole building. In the paper, the finite element program LS-DYNA is used to simulate the dynamic response of RC column with different constraints subjected to blast pressure. A three dimensional solid model is established for the RC column. A brittle damage model is applied to simulate the concrete. The lateral displacement and failure mode of RC column with different scaled distances are investigated and discussed. It can be found that the pressure nephogram and x-direction displacement of fixed end column under different scaled distance have the obvious symmetry. Moreover, both the maximum pressure and x-direction displacement of one end fixed and one end simply supported column are bigger than fixed end column with the same scaled distance.
Deformation Calculation of Prestressed Steel Reinforced Concrete Beam under Long-Term Loading
Authors: Mu Guang Bo , Wang Lian Guang
Published: May 2011

The deformation calculation formulas under long-term and different loading of prestressed steel reinforced concrete beams are built up by using age adjusted effective modulus method according to internal force equilibrium and strain harmony of section. Based on that, numerical methods are applied to calculate and analyze stress redistribution of steel and concrete, deformation of beam in different time slice, as well as the curves about how concrete strength, axial force, moment, volumetric percentage of steel and volumetric percentage of tendon affects mid-span deformation of long-term loading beam.