bluuebunny/crossref_metadata_2025 huggingface dataset:
Designing Concept and Prospect of Green Architecture in China
Authors: Wang Mei Yan
Published: August 2012

With the deterioration of the environment today, the thought of green architecture is becoming increasing important in China. The differences among the green architecture, non-green architecture and high-tech standard architecture should be found, and the evaluating criteria of the green architecture should be summed up, so as to guide the design of green architecture in China more effectively in the future.
Studies on In-Plane Stability Behavior of Arches with Web Openings
Authors: Jiang Li Yun , Liu Man Xiang , Kang Li Qiang
Published: August 2012

As a new type structural member, the steel arch with web openings combines the features of both arches and members with web openings and its applications has been found. Studies on in-plane stability behavior of two-hinged arches with web hexagonal openings are made using Eigen buckling model of the finite element software ANSYS. The buckling load and buckling mode are obtained and the in-plane buckling mode is antisymmetrical. It is shown that buckling load decreases gradually as the circumcircle radius of openings increases and it increases as the gap between openings increases through analysis of buckling load with different parameters such as r/h, g/h, f/l. It can be found that the structural efficiency is the highest when the radius of openings is 0.3h with the aid of optimized function.
Empirical Study on Factors Influencing the Development of Construction Industry - Based on Anhui Construction
Authors: Yang Shi Dong
Published: August 2012

The paper, on the basis of the statistical data from 1980 to 2009 in Anhui province, uses linear regression method, Johansen test, Granger causality test and impulse response function to analyze the internal and external factors affecting the development of construction in Anhui. The results show as follows: the development of Anhui construction industry is characterized with the extensive economic growth pattern; the long-term equilibrium relationship is identified between the added value of the construction industry and its external factors; GDP and the added value of the real estate industry are the Granger causality of the economic development in construction; Real estate industry has made more contributions to driving the development of construction industry than that of GDP. In addition, this thesis gives some suggestions on the development of Anhui construction industry.
Analysis on Steel-Concrete Interface of Hybrid Self-Anchored Suspension Bridge
Authors: You Jing Tuan
Published: August 2012

Based on analysis on steel-concrete interface of a hybrid self-anchored suspension bridge, the shear distribution of shear studs under load and influence of contact friction on steel-concrete interface are studied in this paper. The results show the existence of friction reduces the stress of shear studs, but not affects the performance of box girder and shear studs under load, and the vertical stress of shear studs in steel-concrete joint is increasing with the space of neutral axis.
Study on the Recycled Concrete Beam’s Stiffness
Authors: Yu Fang , Yin Can Bin , Jiang Min
Published: August 2012

The intent of this paper is to investigate the flexural behavior of 4 recycled concrete simply-supported beams with same percentage of reinforntage of reinforcement and axial compressive strength but different replacement ratio of recycled aggregates.Besides the flexural capacity of normal section,the characteristics of both deflection and cracking are analyzed.Based on the experiment results,the following conclusions are drawn.In bending,the recycled concrete beam also has elastic,cracking,yield and ultimate point.The ultimate moment of recycled concrete beam can be estimated by the formula suggested by present code.
Effect of Indoor Thermal Environment on Building Energy Consumption
Authors: Cai Kun , Chen Zheng Dong , Yang Xue Bin , Zhang Yao Fen , Li Ming Xue
Published: August 2012

This study reviews some published literatures to seek the relationship between the parameters of indoor environments and the energy consumption. The indoor thermal environments are categorized and defined as different indices and variables. The building energy can be determined by indoor air temperature, occupant-area ratio and working days. Several parameters of indoor thermal environments such as air velocity, neutral temperature, predicted mean vote, indoor air quality, and set point temperature, are summarized for their influence on the energy consumption. It can be concluded that the increased local air velocity, enhanced neutral temperature, and enlarged set point temperature may be beneficial to reduce the energy consumption.
The Improved Mechanics Behavior of the FRP Deck
Authors: Li Yeou Fong , Hsu Tseng Hsing , Hsieh Fu Chr
Published: August 2012

The objective of this study is to improve the stiffness and control the failure mode of the pultruded glass fiber reinforced polymers (GFRP) deck members to meet the design requirements. In this study, the authors proposed that the GFRP member was affixed by another GFRP deck inside it to form a combined GFRP deck member; an epoxy mortar was filled into some of the hollow sections of the GFRP member; and the basalt/carbon fiber sheets was wrapped around the GFRP member in order to improve the ultimate strength and stiffness and also to change its original failure mode of the GFRP member. Eight GFRP deck specimens where investigated in the three-point bending test results for their ultimate strength, stiffness, and corresponding failure modes. Finally, the Euler beam theory was used to obtain the force-displacement relationships of the GFRP members and then to compare the experimental results.
Fundamental Mechanical Performances of Rubber Concrete
Authors: Xu Jin Hua , Feng Xia Ting , Chen Si Li , Shi Chen Yang
Published: August 2012

At present, waste rubber tires cause a significant environmental and human health problem. An innovative way to recycle used tires is that the waste tire rubber is used in Portland cement concrete as a portion of aggregates. In this paper, the crumbed tire rubber particles were used to replace fine aggregates, which includes two grain sizes, from 3 to 4 mm and 50-mesh.. The replacement levels were 0, 5, 10, 15, and 20 % by volume of the fine aggregates. Rubber concrete mixtures were produced according to mixture proportions design. The slump of fresh concrete and the unit weight of the nine mixes were examined. The mechanical properties investigation of harden concrete included determining the 28 days compressive strength and dynamic modulus of elasticity. The study demonstrated that 5 and 15 vol% replacements with rubber powder can meet fundamental engineering demands, although substituting part of fine aggregate with fine rubber powder deteriorated mechanical properties of concrete.
Experimental Research on Resistance to Frost of Rubberized Concrete
Authors: Xu Jin Hua , Chen Si Li , Wang Ying , Liu Ming
Published: August 2012

According to mixture proportions design, rubber concrete specimens were produced, which were used for test of resistance to frost. In this study, different grain size and different content rubber were mixed in Portland cement concrete. Quick freeze-thaw test was carried to rubberized concrete. The research shows that appropriate proportional fine aggregate replaced by the discarded tires powder and grain can improve concrete resistance to frost, although concrete compressive strength, flexural strength and dynamic elasticity modulus decrease with increasing of rubber content. The improving effect of rubber powder is better than rubber grain. Furthermore, it is demonstrated that the dynamic elasticity modulus obtained by Non-destructive testing can commendably evaluate the frost resistance of rubberized concrete.
Assessment System of Green Building in Chongqing
Authors: Wen Zhen , Wen Jin
Published: August 2012

In the recent twenty years, with the rapid development of china’s economy and city construction, residential projects development becomes more prosperous than ever before. The speed of Chinese Chongqing residential projects development is higher than any period in history. It brings many problems, such as house price went up too quickly, resources consumed over much and so on, due to the development speed was too high and the developers seeking high profit unilaterally. Therefore, we must seek a proper balance between endless requirements and limited resources supply and aim at to construct a keep zoology balance, increase the efficiency of energy and other resource, and share comfortable healthy and most cost-efficient residence as a final goal. Based on previous reasons, the thesis try to provide a basic point for the whole industry to correspond via the evaluation and research on durative of Chongqing residential project, to guide developers to follow a uniform high standard while developing residential projects, heighten the integral level of residence development.
Research on the Mechanical Properties of Fire-Damaged Reinforced Concrete Columns Strengthened with CFRP
Authors: Qiu Dong Liang , Yu Kai , Wang Guo Feng , Li Jun Hua
Published: August 2012

The mechanical properties of fire-damaged reinforced concrete columns rehabilitated by carbon fiber-reinforced polymer (CFRP) rods were studied. This study aims at the effectiveness of CFRP through the contrast test. Nine specimens were tested, including three normal temperature control specimens, and six specimens heated under ISO834 standard fire. After the specimens were exposed to fire, three of them were rehabilitated by CFRP. All specimens were loaded monotonically to failure in the same way. The results showed that the failure of reinforced concrete columns rehabilitated by CFRP was due to losing stabilization, whereas the others were material broken. Furthermore, because of the fire, the load-bearing capacity of specimens was all declined sharply compared with these at normal temperature. From this research, comparing with these normal temperature control specimens, the load-bearing capacity of specimens exposed to fire firstly was ranged from 0.25 to 0.37 times. But the ratio of the loading capacity of specimens rehabilitated by CFRP and normal temperature control ones was ranged from 0.54 to 0.67.
The Prediction Method of S-N Curve for Welded Steel Structure Using Critical Distance Theory
Authors: Guan De Qing , Pan Yan Hui
Published: August 2012

The welded steel structure is used as the research object in this paper. On the basis of numerical analysis of welded steel structure in 3-D residual stress field, the predicted method of the fatigue strength and S-N curve for welded steel structure is set using the volume method of the critical distance theory. The fatigue strength and S-N curve of the typical the welded steel structure including butt, misaligned welded and T-shape joints are got through theory prediction. The predicted value coincides with the experimental value. This method can be reduced fatigue test, saved funds and provided reference for engineering application.
The Flange Effect of Brick Masonry Wall Subjected to Seismic Effect
Authors: Yao Na Na , Zhang Wen Fang , Wei Jian Wei
Published: August 2012

This paper researces the effect of flange width on anti-seismic performance of flanged brick masonry walls. Four T-shaped cross section unreinforced brick masonry walls with different flange width and one rectangular shaped cross section brick masonry wall are studied and analyzed by ABAQUS finite element method.Analyze and compare the force-displacement curves of flanged brick masonry wall under the composed of vertical and lateral load.The results indicate that the flange width has a significant effect on the shear bearing capacity and ductility. The shear bearing capacity and ductility factor of T-shaped cross section brick masonry walls with 1.6m flange width are respectively 20% and 50% higher than the no flange wall .The flange effect is obvious when the flange width is not more than 1.6m, the value of shear bearing capacity and ductility are higher when the flange width become longer.
Experimental Study of Vegetation-Growing Concrete’s Resistance to Rain Erosion
Authors: Yang Qi , Xu Wen Nian , Ding Yu , Yang Yue Shu
Published: August 2012

Taking an experiment of vegetation-growing concrete’s resistance to rain erosion, the influence degree of the related factors on erosion amounts will be obtained. The erosion process of vegetation-growing concrete gunning slope is influenced by cement content, vegetation coverage, rainfall intensity and other factors. In this paper, it talks about the influence of different cement content, rain intensity and maintenance days on vegetation-growing concrete’s erosion. The results show that the anti-erosion ability of vegetation-growing concrete increases significantly with the increase of the cement content and the erosion amounts are linear with cement content. Based on the analysis to the interaction effects of the factors, some measures could be proposed for better usage of vegetation-growing concrete and its extension.
Application Research of Solar Energy Technology in Liaoning Rural House
Authors: Xu Dong , Wu Ya Jun , Wang Xue Ying
Published: August 2012

In the construction of new socialist countryside strategic decision background, in view of China's energy shortage and the present situation of the huge energy consumption, and puts forward the development through solar house to solve the problem of heating in northern rural residents, at the same time, reduce energy consumption level and Improve construction of solar and other renewable energy sources. Combined with the characteristics of the northern countryside, from construction design principle, energy-saving design, construction of building plane made profile design introduced the rural north solar house construction optimization design ideas and points. In liaoning province for ecological rural construction laid solid foundation, and for solar house in north China rural development provides a certain basis.
Research of Solar Assistant Floor Radiant Heating in Freezing Region
Authors: Zhang Zi Guo
Published: August 2012

Base on theory, experiment system was established to research the feasibility of using solar energy to heating in freezing region. Through one heating period to verify that solar assistant floor radiant heating was feasible and it can save energy, initial cost can be payback in 4 years.
Life Cycle Inventories of Renewable Energy Construction Project — Energy Consumption and Direct Emission
Authors: Ren Yue , Ren Jie
Published: August 2012

Renewable energy construction project can promote the sustainable development. The life cycle list of the air conditioning system of a renewable energy construction project has been established. Calculate this project’s energy consumption and emissions at construction stage and operation stage. The emissions include CO2、SO2、NOx、CO、CH4、PM、NMVOC and NO2. This project in the whole construction stage of the energy consumption is 17861224.1 MJ, accounting for 23% of the total life cycle energy consumption.
Green Road Using Reclaimed Asphalt Pavement for Sub-Base and Base Layers
Authors: Du Jia Chong , Hung Wan Chien
Published: August 2012

Based on cost effectiveness, environmental impact, energy savings, and shortages of quality materials, reclaimed asphalt pavement (RAP) used for pavement construction does not only reduce aggregate need, but it also solves the problem of RAP disposal. Thus, the technology of cold mix recycling for pavement sub-base and base is introduced and tested in laboratory. The test results show that the recycled cold mix is a candidate material for pavement sub-base and base layer use. However, cold-mix emulsion asphalt used for recycling must be designed properly to ensure reliable performance. The unique features of recycled cold mixes are time temperature effects.
Study on the Low Temperature Hot Water Heating System by Solar Energy
Authors: Xu Yu Mei , Huang Lei
Published: August 2012

In this paper, we combine villa in comparing low temperature solar water for floor heating with regular heating sources. In the end, this paper analysis the economization and conservation benefit of solar heating system and domestic hot water. The best scheme of villa is solar system combining centralizing hearing.
An International Comparison of CO2 Emission Performance and Reduction Potential Using Environmental Production Technology
Authors: Wang Qun Wei , Ge Shi Long
Published: August 2012

CO2 emission performance and reduction potential indicators are proposed in this paper by environmental production technology under total-factor framework. Based on this, we give an empirical research on 49 world major emitting countries from 2001 to 2007. The result shows: the average performance of all countries only has very small fluctuation, staying at 0.65 to 0.67; America and Europe’s performance is relatively high and Asia is the lowest but its gap with other countries is shrinking. Now CO2 emission reduction potential has shown an up-trend year by year in these countries, especially for China, India and Japan in Asia.
Heat Recovery and Urban Mobile Heat Provider System for Industrial and Mining Enterprises
Authors: Jiang Pei , Li Nan , Sun Yang Chao
Published: August 2012

Heat recovery and urban mobile heat provider system facilitate both users and thermal power factories at the same time. Plentiful of energy will be saved by it which is responding to the harmonious society's requirement. Redundant heat energy is used by heat storage material in vehicles, so economy and rapidity is the characteristic of the system
Effects of Aspect Ratio on Average Daily Shading Factor of Flat-Plate Solar Collector Array in Winter Months
Authors: Wei Sheng Xian , Zhang Zhong Yu , Zhou Xiao Feng , Tao Shu Fen
Published: August 2012

A model to calculate daily shading factor of flat-plate solar collector array installed on the limited horizontal roofs has been developed. The relations between the latitude, the average daily shading factor, the floor area, and the aspect ratio of the collector array have been deeply studied. The results show that the average daily shading factor on winter solstice day increases with the increase of the latitude and aspect ratio. For a given latitude, the average daily shading factor of a collector array (floor area ≥ 500 m 2) increases linearly with the increase in the aspect ratio within a range of [1/10, 3/1] and increases smoothly with the aspect ratio ranging from 3/1 to 10/1. The average daily shading factors do not exceed 0.085 for the low latitude regions (lat. ≤ 30o N), whereas the maximum average daily shading factors for a 1000m 2 collector array can reach 0.140 when the latitude is close to 40o N.
Exploration about the Ecological Model of Road Landscape in the Construction of New Rural Landscape
Authors: Tian Mi Mi , Fang Mao Qing , Zhang Yi
Published: August 2012

Along with the rapid development of social economy, a new socialist countryside landscape construction is in full swing on the land of China. Handling rural road landscape development problems in new rural construction is the content need to explore and summarize in the practice. This paper, though the analysis about composing factors of agricultural landscape and road landscape, combining with the ecological design principles, explores ecological model of ecological agriculture traffic and road landscape in the future from the aspects of township roads, village roads, field roads.
Composite Evaluation Model Analysis to Eco-Carrying Capacity of High-Density Residence Communities
Authors: Hou Xin Hua , Wang Shi Tong , Lai Di Hui
Published: August 2012

This paper built a dynamic evaluation model of eco-carrying capacity of high-density residence communities by using state space representation and GPCA, and made an analysis of the model on dynamics vision,which enriched the content of residential ecological research and offered method for researches about eco-carrying capacity of residence communities.
Building Energy Simulation for LEED Qualification on a Commercial Building in China
Authors: Law Ching Hin , Yang Jian Kun , Jiang Xiang Yang
Published: August 2012

This research introduced and implemented building energy simulation via a case study of a commercial project in China, by considering the green features which can reduce the annual energy consumption of this building. This simulation process was based on the requirement described within LEED EA c1 Optimize Energy Performance. The result concluded that more than 39.41% of energy cost was reduced and thus the project can obtain 16 points from this credit.
A Model of Application of Green Construction Techniques - HVAC Project of China's Scientific Development Concept Exhibition Hall
Authors: Huang Pu Jie , Xu Yi Na
Published: August 2012

Take HVAC project of China's Scientific Development Concept Exhibition Hall in Taizhou for example. Based on the rules and requirements of energy saving and using in the Green Building Evaluation Criteria, explore the green building realization model which adopts the low-cost energy saving technology and minimizes the environmental pollution in the entire life cycle of the building. It is desirable that the hall, with a blend of geographical features, be a comfortable, healthy and environment-friendly cultural building of international influence.
Problem about Solar Water Heating System and Residential Building Integrated
Authors: Wang Xue Ying , Xu Dong , Wu Ya Jun
Published: August 2012

This article analyzes the problem in application the solar system was used in residential building, puts forward the requirements to use energy and choose the setting of the solar energy collector from two aspects of building and drainage design respectively. In addition, the article explicates andthe solar energy collector and building integrated design and the development of solar energy collector. At last, the article puts forward some Suggestions on the improvement and development of residential solar hot water system and the design of the hot water supply bath solution of practice to make solar energy and low power assisted by night combining.
Preparation and Performance Study of Fatty Acid Diatomite Composite Phase Change Materials and Light Weight Phase Change Gypsum Wall Materials
Authors: Zhang Yi , Huang Bin , Zhang Jing Yan , Li Dong Xu
Published: August 2012

Fatty acid phase change materials(PCMs) and composite diatomite PCMs were prepared in this study, the phase change temperature of different mole ratio lauric acid(LA) and capric acid(CA) PCMs were tested by step cooling curve method, thermal physical performance of the prepared PCMs were tested by differential scanning calorimeter (DSC). A new type of lightweight phase change gypsum wallboard incorporated with LA-CA/diatomite composite PCMs was prepared, and the thermal performance of this material was studied. The results showed that the LA and CA could form an eutectic mixture. DSC results indicated that the phase change temperature of the PCMs and composite diatomite PCMs are both 26.7°C, the latent heat of the PCMs are 142.2J/g and 73.5J/g, respectively. Thermal performance test of the gypsum wallboard indicated that the temperature difference of the phase change gypsum wallboard at different moment is lower than the blank gypsum wallboard, which showed a better energy storage function of the phase change gypsum wallboard.
Effect of Nitrite Concentration and pH on Steel Corrosion Induced by Chloride in Simulated Concrete Pore Environment
Authors: Cao Zhong Lu , Hibino Makoto , Goda Hiroki
Published: August 2012

The influence of nitrite concentration on the corrosion of steel immersed in three simulated pH environments that really exist on the surface of steel in concrete has been investigated by comparing and analyzing the change of threshold level of Cl- and NO2-/Cl- mole ratio. The results indicate that with the presence of nitrite, the corrosion of steel can be inhibited effectively. Chloride threshold level increases with the increasing of nitrite concentration and highly alkaline environment plays an important role in assisting nitrite to inhibit corrosion. The use of NO2-/Cl- mole ratio as the parameter to guarantee the inhibition efficiency is suitable in highly alkaline environment, but not appropriate in weakly alkaline and neutral environments.
Compatibility between Orychophragmus violaceus and the Plant-Growing Concrete
Authors: Wu Yan You , Chen Ying , Zhao Hong Peng , Zhao Kuan , Song Zhong Nan , Wang Ke
Published: August 2012

Planting Orychophragmus violaceus in light-weight green concrete is feasible by drilling method. O. violaceus roots can fit the plant-growing concrete and surrounding perlite. Compared with O. violaceus roots growing in soil, the number of lateral and fibrous roots around the taproot growing in light-weight green concrete is much more. O. violaceus can be selected as a plant species growing in greening concrete.
Studies on the Time-Varying Effect of Root Morphology and Soil Reinforcement of Two Kinds of Herbs
Authors: Zhao Bing Qin , Xia Zhen Yao , Xu Wen Nian , Zhou Zheng Jun
Published: August 2012

The roots can significantly increase the soil reinforcement of vegetation, and the fractal theory provides a new perspective for vegetation roots studies. This article applied the Fractal Fox software to calculate the fractal dimension of medicago sativa and cynodon dactylon roots in different growth periods and proved that the two species show fractal characteristics. The conclusions from the analysis are as follows: ①The fractal dimensions of the two plant roots tend to be stable with the increase of growth period; ②The fractal characteristic value of cynodon dactylon root is more significant than medicago sativa root; ③Compared with medicago sativa root, cynodon dactylon root is more effective in increasing the shear strength of soil.
Process and Mechanical Properties of Basalt Fiber/Polylactic Acid Composites
Authors: Lv Li Hua , Liu Gui Bin , Zhou Dan
Published: August 2012

In this paper, the basalt fiber/polylactic acid composites were prepared by laying-up hot-pressing process, using PLA sheet as the matrix material and basalt fiber fabrics as the reinforced material, besides, the mechanical properties were studied and the parameters of hot-pressing were optimized. PLA mass fraction, heat pressing temperature, heat pressing pressure and heat pressing time were selected as the four main influence factors and tensile strength and bending strength were taken as the test indexes, the best processing conditions: PLA mass fraction 63%, Heat pressing temperature 195 °C, Heat pressing pressure 7MPa, Heat pressing time 10min were optimized through orthogonal experiment and range analysis. The significance of the study was providing theoretical guidance for the further development of high-performance basalt fiber composites.
The Application of Green Architecture to Residential Building Development
Authors: Chen Ron , Yang Hsi Chi , Chang Hsiao Chun
Published: August 2012

As a result of excessive construction and development, the earth environment has severely deteriorated. Based on the data from Architecture and Building Research Institute, Ministry of the Interior, the amount of CO2 emissions of the construction industry has exceeded one quarter of the national total. The CO2 emission distribution is 9.31% for building materials production, 0.2% for construction, 1.49% for materials transportation, 11.88% for residential daily energy use and 5.94% for commercial daily energy use with a total of 28.82%. It can be seen that the residential buildings play a key role on energy saving and CO2 emission reduction policy. Although, at present, new residential buildings over 50 million NT dollars are required to execute green architecture design to conform to the green architecture labelling system based on the related building regulations, the government policy of green architecture on residential buildings has been more or less passive. For the general residential buildings built earlier and newly built, the government is not yet to require them to comply with the green architecture labelling system. Therefore, it may influence the promotion of energy saving and carbon dioxide emission reduction policy. The green architecture development of residential buildings is influenced by a lot of criteria. By studying those criteria, the most easily implemented or most cost effective criteria can then be applied to them. This research tries to establish a assessing framework for applying green architecture to residential building development. This research first, through literature reviews and and expert interviews, determines the criteria and sub-criteria to be used in the initial assessing framework. Then, through expert questionnaires, the Delphi method is used to finalize the assessing framework. Finally, the Analytic Hierarchical Process (AHP) is used to identify the relative weights of criteria and sub-criteria. From the relative weights of criteria, the building materials criterion has the greatest impact on the application of green architecture to residential building development. The priority weights of sub-criteria can help us understand when to apply those sub-criteria. In gerneral, the sub-criteria with high priority weights can be immediately implemented in the existing and newly built residential buildings and the sub-criteria with low priority weights should be implemented in the design stage.
On the Assessment Tools of Green Building Materials
Authors: Yan Xin Ming , Tan Da Lu , Jia Hong
Published: August 2012

The impact of the construction industry on the consumption of natural resource and environment cannot be ignored. There is no doubt that green building will be a trend in the international construction industry. It is crucial to choose the appropriate green building materials, because it acts as key factor to the development of green building. With the brief introduction of two mainstream assessment tools of green building materials in the world and two main evaluation tools that are used in China as well as their advantages and disadvantages, this article is expected to serve as the reference for development of green building materials and the assessment tools in China.
Finite Element Analysis of Concrete Frames after Fire with Fiber Model
Authors: Xia Min , Yu Jiang Tao , Lu Zhou Dao , Zhang Li Wen
Published: August 2012

In order to analyze the residual mechanical properties of concrete frame structures after fire, a novel numerical model considering the distribution of non-uniform temperature in the cross-sections of structural members and the changing of mechanical properties of materials damaged by fire is developed in this paper by dividing the cross-sections of structural members into a lot of concrete fibers and steel fibers based on the concept of fiber model. Besides, the Analytical System of Fire-damaged Concrete Frame (ASFCF) is established through the secondary development of ABAQUS Software that is completed by the programming language of Python. This system is used to analyze the temperature fields and the nonlinear mechanical performances of a multi-story, multi-span, three-dimensional concrete frame after fire. The results indicate that ASFCF can properly analyze the mechanical properties of concrete frames after fire, and it provides valuable references for assessing the residual mechanical properties of concrete frames after fire.
Properties of Mortar with Recycled-Cement
Authors: Lu Hong Zheng , Ai Hong Mei , Yan Fang , Han Li Dong
Published: August 2012

Waste concrete as the main object of the study, was proved to be capable of producing recycled-cement. The chemical composition of recycled-cement was analyzed by X-ray diffraction and compared with industrial clinker from Onoda Company. The result of comparison showed that the minerals in recycled-cement were almost the same as the industrial clinker, except a little MgO and CA. The amount of four main minerals in cement clinker was reasonable. The mechanical property of mortar produced with recycled-cement was measured. The results showed that the compressive strength of recycled-cement mortar can reach the standard of mortar with P.O 32.5. The excess MgO and the strength grade of waste concrete we used in the research were identified as the restriction of the strength development of recycled-cement.
Attenuation Ratios of Cement-Based Materials Containing B4C to 14.8MeV Neutron
Authors: Shen Zhi Qiang , Kang Qing , Xu Jun , Wang Zheng Gang , Zeng You Jun
Published: August 2012

Cement-based material samples having 0%, 5%, 10% and 20% B4C concentrations have been prepared for this reserach. Neutron attenuation measurement has been done by using 14.8MeV neutrons from the 5SDH-2 accelerator, and some mechanics properties of the same proportion also have been tested. It has been shown that when the B4C precentage and thickness of the samples increase, neutron attenuation values of the samples increase. Both the flexural and compressive strength firstly increased with B4C addition up to 10% approximately, and then decreased sharply with an addition up to 20%. It is thus possible to enhance the neutron shielding property of cement-based materials by adding B4C.
The Analysis and Research of Secondary Phases Generated during Isothermal Aging of Duplex Stainless Steels
Authors: Lin Kai , Shi Hong Qi , Ma Li Qun , Ding Yi
Published: August 2012

The properties and precipitation rules of secondary phases generated during isothermal aging of duplex stainless steels and factors affecting the precipitates were reviewed in this article. These secondary phases include carbides(M23C6,M7C3), nitrides(Cr2N,CrN) and intermetallic phases(σ-phase, χ-phase, Fe3Cr3Mo2Si2, R-phase, π-phase, α′-phase). With the right understanding about the phases, the aim is the suitable heat-treating processes would be chose to avoid the unfavorable influences of secondary phases.
Experimental Study on High-Performance Water-Reducing Agent in C80 Concrete
Authors: Hang Mei Yan , Lan Ying Jing , Zhang Bing , Qu Shu Qiang
Published: August 2012

By using the High-performance water-reducing agent to do a series of technical demonstration test, and using the local raw materials, mixing with large numbers of mineral admixture, this paper makes up the cost lower C80 high strength and high performance concrete successfully. The test results show that the High-performance water-reducing agent can improve construction of concrete and physical and mechanical performance and durability after hardening
Sorptivity of Porous Construction Gypsum Plasters
Authors: Wang Qing Guo
Published: August 2012

To understand the water transport properties and generally the mass and heat transfer performance, the sorptivity of different building gypsum plasters are investigated by experiments. The sorptivity of five kinds of gypsum materials are measured and compared with that of fired clay brick. The effects of water/plaster ratio, wet/dry cycles and lightweight additives on the absorbing properties are investigated. The “square root of t￼” law and the validity of sharp water front (SWF) model are also analysed. It is concluded that the absorption properties of gypsum plasters are sensitive to premixed lightweight aggregates, water/plaster ration and wet-dry cycles
Corrosion Performance of Common Pressed Prepainted Steel Sheet
Authors: Bai Hui Ping , Zheng Zhong Hua , Tu Yuan Qiang , Cai Jie
Published: August 2012

The corrosion behavior of common pressed prepainted steel sheets with trade mark TDC51D+Z was studied by neutral salt spray and electrochemical impedance spectroscopy (EIS). The effect of organic polymers on the corrosion performance of prepainted steel sheet was analyzed with glow discharge optical emission spectrometry (GDS). The results showed that the distributing depth of titanium pigment determined the corrosion performance of prepainted steel sheets with white finishing coat.
Use of Limestone Powder to Improve the Properties of Self-Compacting Concrete Produced Using Cathode Ray Tube Waste as Fine Aggregate
Authors: Sua-Iam Gritsada , Makul Natt
Published: August 2012

This paper presents the effect of added limestone powder (LS) on the fresh and cured properties of self-compacting concrete (SCC) containing cathode ray tube glass waste. The concrete was produced using ordinary Portland cement at a water-cement (W/C) ratio of 0.38 by weight. CRT glass waste cullet was incorporated in river sand in proportions of 20 or 40%. To suppress potential viscosity effects limestone powder was added at levels of 5, 10, or 15% by weight. The slump flow time, slump flow diameter, V-funnel flow time, Marsh cone flow time, and setting time of the fresh concrete were tested, as well as the compressive strength and ultrasonic pulse velocity of the hardened concrete. The slump flow, V-funnel flow time, and Marsh cone flow increased with increasing limestone powder content, while the compressive strength and ultrasonic pulse velocity decreased. The results demonstrate that it is feasible to use limestone powder to produce SCC containing CRT glass waste as a fine aggregate replacement.
Synergistic Effect of Zeolite on Bonding Strength of Flame Retardant Plywood
Authors: Wang Ming Zhi , Bi Ye , Sun Wen Jing , Ji Hai Ping , Li Li
Published: August 2012

The construction industry has relied heavily on plywood for residential and commercial interior finish. In order to reduce the fire hazard caused by flammable plywood, it is necessary to treat plywood with flame retardant which leads to the reduction of bonding strength and limits the widely application of flame retardant plywood. The objective of this paper was to study the effect of 3A, 4A, 5A and 13X zeolite added into urea formaldehyde (UF) resin on the bonding strength and the LOI values of phosphorus-nitrogen (P-N) flame retardant (FR) plywood. The results showed that zeolites added into UF resin improved the bonding strength of flame retardant plywood. 13X zeolite had the highest efficiency in enhancing the bonding strength. 4A zeolite had a synergistic effect on P-N flame retardant when it was added into UF resin. 3A, 5A and 13X zeolites showed little negative effect on LOI values of flame retardant plywood.
Research on Method of Separating Autogenous Shrinkage from Thermal Deformation of Concrete at Early Ages
Authors: Xie Li , Ding Wu Yang
Published: August 2012

In order to separate early-gae autogenous shrinkage from thermal deformation, it is the key to measure accurately thermal expansion coefficient of concrete at early ages. By analysing deeply the research status of early-age thermal expansion coefficient of concrete, the influences of temperature history on early-age autogenous shrinkage and the selection of thermal expansion coefficient are discussed. Moreover, based on the existing methods of separating early-gae autogenous shrinkage from thermal deformation, the more reasonable two-phase separating method considering concrete ages is provided.
Research on Permeability of the Construction Generated Soil Serving as Filling Material for Consolidation Piles
Authors: Chen Lan
Published: August 2012

In order to use the construction generated soil to replace high quality sand for consolidation pile as filling material partially. Clay soil specimens with different plasticity index were prepared. Moreover, the permeability tests were carried out for studying the permeability property. Experiments show that permeability coefficient can be guaranteed over 10-4cm/s in loosening status when plasticity index is smaller than 30, but that becomes very small in consolidation status. Therefore, some auxiliary methods must be adopted to improve the permeability of sand piles for drainage efficiently.
A Study on the Application of Rubber Crumb Modified Asphalt Mixture
Authors: Wang Xiao Chu , Li Ying , Wang Yi Peng , Fu Lei
Published: August 2012

The article is based on the rubber crumb modified asphalt’s fundamental characteristics, paving a practical road surface, doing rubber crumb modified asphalt concrete road surface in the Northern cold regions’ practical application and testing, summarizing relevant experience, providing reference for similar engineering application .
Research for Experiment of Molten Carbonate Fuel Cells Generation
Authors: Tian Yu Dong
Published: August 2012

The molten carbonate fuel cell (MCFC) is an important research field of the new energy generation equipment. To aim at the problem that MCFC electrical characteristics reflect the generating performance, the electrochemical process mechanism of MCFC electrochemical reaction was analyzed firstly, then an electrical model of MCFC electrical characteristics based on the electrochemical process was advanced. Thirdly, the hot start process, and the output test of MCFC generation applied the experiment were particularly presented. Finally, the experimental results proved that it was fast and accurate.
Experimental Study on Fire Resistance Performance of Glulam Beams
Authors: Ni Zhao Peng , Qiu Pei Fang
Published: August 2012

Abstract : A series of standard fire-resistance tests were carried out to study the fire performance, failure modes and fire-resistance ratings of glulam beams. The test results showed that these glulam beams performed well during the tests, and the fire-resistance rating requirements can be achieved as expected. The study has provided necessary knowledge and experimental data for the determination of fire-resistance performance of glulam beams in the fire code of China.
Research on the Adobe Block of the System of New Compounded Adobe Walls
Authors: Liu Guo Ping , Zhang Yin
Published: August 2012

Through the introduction of the Structure of compounded raw soil walls , this paper has a deep research on the adobe block which is the main innovative components of the wall. With the help of the traditional Rammed earth theory and large quantities of practical data, we have gained some scientific data and specific sizes of the adobe block in practical production to further improve the construction art of the ecological walls, providing the reference for the Structure of compounded raw soil walls in practical application.
Study on Evaporative Cooling Effect of Porous Decorative Layer Applied to Vertical Walls
Authors: Feng Yan Shan , Zhang Lei , Meng Qing Lin
Published: August 2012

The porous materials are more and more popular throughout the world. However most of the resent researches focus on the porous materials applying to horizontal plane. In this paper an experiment was conducted to study the applicability of porous decorative layer applying to vertical walls. The Experimental result shows that the wet porous decorative layer has a good applicability to west-facing wall by reducing the external surface temperature at least 8°C and eliminating the temperature peak of inner surface. The equivalent thermal resistance of the porous decorative layer is 0.40 m2•K/W, when using the 4-day value of the measurement. In the summer of Guangzhou, the porous decorative layer on west-facing wall is recommended to supply water once a day at 13:00.
Analysis of the Major Drivers of Building Energy Consumption Using the STIRPAT Model - A Case Study in China
Authors: Cai Wei Guang , Ren Hong , Cao Shuang Ping , Lu Hui Juan
Published: August 2012

In this paper, the STIRPAT model has been used for quantitative research of the driving factors of building energy consumption in China. We use the ridge regression method to obtain the regression equation between building energy consumption and five key driving factors, including population, urbanization rate, household consumption level, per capita living space, and the development of the tertiary industry. The results show that the comsumption level has higher influence on building energy consumption in China than the other four factor, and the influence of the tertiary industry and building area factors is inferior. The influence of population factor on the growth of building energy consumption is small, but the distribution of urban and rural population factors (urbanization rate) have greater influence than the total population factor.
Time History Analysis to Prestressed Concrete Exterior Wall of LNG Storage Tank within Condition of Interior Tank Betray
Authors: Li Wen , Wang Peng , Yao Li Na , Shao Shu Ai
Published: August 2012

For analysis of prestressed concrete wall vibration character of cylindrical LNG tank on conditions of inner-tank leaking, the finite element analysis model of tank exterior wall of leak conditions is built and the modal analysis is carried out; then dynamic pressure on liquid storage equivalent with tank wall have the same acceleration of additional mass, natural frequency of teak wall is gotten; in state of semifluid and fluid filled, using methods of simulation of prestressed effect equivalent load, the natural frequency of the external wall of the central to the wave curve is achieved. The analyzing results show that: in state of fluid filled LNG storage tank, liquid is the largest effect on the frequency of prestressed concrete external wall. When liquid position is less than half the maximum reservoir depth, its natural frequency can be calculated by empty tank; when the liquid position is more than half the maximum reservoir depth, we should considerate that the liquid vibration has impact the vibration frequency of tank exterior wall; when different liquid position, the largest affection is 2.29% to natural frequency of prestressed wall.
Study on Stability of Arch Bridge by Finite Element Method
Authors: Yan Xiao Xin , Zhang Chun Xia , Zhao Liang Hua , Cao Bao Ping
Published: August 2012

Arch is a structure suffers press mainly, and the problem of stability is very standout. As the continuous increase of arch’s spanning capability, application of new materials, arch structural integral and partial rigidity comparative declines and makes the problem of arch’s stability even more standout. In this article, through study on stability of arch bridge by finite element method, we discussed arch bridge’s linear and nonlinear finite element solve method.
Field-Trial Study on the Control and Prevention of Soft Ground Settlement through Geogrid Reinforcement and Pile Supporting
Authors: Liang Ji Feng , Wang Feng , Bao Guo
Published: August 2012

As advanced foundation treatment technologies, geogrid reinforcement and pile supporting are widely applied to the reinforcement of subgrade and giant oil storage tank foundations. The service behaviors of geogrid-reinforced and pile-supported composite foundations are explored through static tests. The focus is on its performance in the control and prevention of general and differential settlement and valuable conclusions are drawn of the study
The Development of Cement Concrete Pavement and Preventive Maintenance
Authors: Yang Shu Zhen
Published: August 2012

This paper introduces the development of cement concrete pavement in China and makes simple comparison with aspect concrete pavement and concludes that the cement concrete pavement has good development prospect. But there are some defects of cement concrete pavement, to solve these problems, this paper introduces the concept and methods of the preventive maintenance, which has enormous economic benefits.
Study on the Optimizing Parameters of Underwater Drilling Blasting
Authors: Li Lin Na , Zhong Dong Wang
Published: August 2012

Optimizing design of parameters is essential for the underwater blasting. The key point of optimizing model is to reflect the relation of blasting parameters, rock fragmentation and operation cost. In this paper, the blasting optimization mathematical model is established, and the optimization of the blasting parameters is obtained using the complex method with computer. Calculation results show that the blasting parameters designed by the optimizing model make the engineering cost lowest.