Applied Mechanics and Materials Vols. 291-294

Abstract: Setting in the youshui Bridge Project and referring to the stipulation on the temperature gradient in current code, this aims to investigate the effects on the stress condition of concrete box-girder bridges caused by the overall heating, cooling or standard temperature changes. The process was carried out by virtue of the general finite element analysis software—MIDAS/CIVIL. The result showed that temperature would greatly affect the structural behavior of a bridge, in particular that the stress condition of the top plate is sensitive to temperature changes. It was therefore suggested that climate conditions should be taken into consideration when determining the temperature gradient values in the code.

Abstract: Green degree evaluation is one of the key problems to Green Construction Supply Chain (GCSC) Management. The influential factors of GCSC green degree can be analyzed from resource saving, pollution reduction and economic aspects. And the basic evaluative indexes of GCSC are discussed. Then, a GCSC evaluation model is proposed based on Data Envelopment Analysis (DEA). The application case shows the feasibility of the method for GCSC evaluation.

Abstract: In the period of advocating low-carbon in the global, low-carbon building materials were studied in this paper. Through the analysis of low-carbon materials used during the remarkable World Expo buildings, the sustainability application of low-carbon building materials was analyzed in depth. Moreover, the property of technology innovation and geographical, ethnic, social attributes were analyzed. This paper is aimed to provide some guidance for the application of low-carbon building materials in the future.

Abstract: As the shortage of global energy is increasing and the building energy consumption in the proportion of total energy consumption is rising, the reconstruction of energy saving for existing buildings gets more and more attention. Through the research on the situation of southward balcony in the heating area and analyzing the disadvantages of the current situation, the author puts forward a preliminary idea of energy-saving for southward balcony. The purpose of the idea is to reduce the energy loss and increase the efficiency in the use of solar energy.

Abstract: Through the analyzing of real estate development methods in China and abroad, this thesis gives us a new idea of using green philosophy to develop Real Estate. According to current situation in China, a sustainable development view was put forward, using green design and green price concepts. Some real projects were given to prove this theory.

Abstract: Aiming to the characteristic of mechanical behavior of pile foundation of frame-type Levee, a design methodology and its main implementation steps for pile foundation of frame-type Levee is proposed based on P-Y curve method. A practical computer program based on MATLAB and Visual Basic computer language is developed for internal force and displacement calculation of pile foundation of frame-type Levee. The methodology which had been applied in a practical engineering paves a new way for design of pile foundation of frame-type Levee.

Abstract: In this paper a small strain elastic element is presented its utility is demonstrated through static displacement problems. Four different methods solve an example, like direct method, Newton-Rapshon method, Modified Newton-Rapshon method and use commercial software Ansys. The MNR method is the fastest method.

Abstract: In this article ,through frame temporary support under combined slab, applied static load experiment on combined slab, compare with the force of temporary support and finite element simulation analysis,thus provide a scientific basis for this temporary support in the Housing Industrialization.

Abstract: The study on dispersion mechanism of dispersive soil has attracted attention in water conservancy project. In order to investigate the main dispersive influencing factors of soil, grey correlation degree method was used to analysis the relation between dispersion degree and exchanging sodium percentage, clay particles content, organic matter, PH, specific surface area, structure damage rate, cation exchange capacity. The results show that the cation exchange capacity and exchangeable sodiuma do the best contribution to the dispersion of soil, and the specific surface area and the structure damage rate influenced the dispersion slightly.

Abstract: The indoor thermal environment usually is measured in the condition of heating or cooling. This paper studies the thermal environment in direct gain solar and heating rooms. The indoor and outdoor temperature and relative humidity, inner surface temperature, human action, and times of opening door per day, are field tested and analyzed. PMV index is used to evaluate thermal environment. The results show that the relative humidity in direct gain solar and heating rooms is too low to comfortable. The curtain from closed to open, the window inner surface temperature decreases 13.9 °C in north orientation room, and decrease 10.3 °C in south orientation room. The indoor air temperature, relative humidity and inner surface temperature at the height of 1.5 m change a little by normal opening door. Thermal environment evaluation proves that in cloudy day, north orientation room is more comfortable than the south orientation room, while in sunny day, their difference of thermal sensation decreases. So we suggest that in order to keep thermal comfort, the curtain should be closed on the condition of no solar energy, the relative humidity should be designed during heating design, and the facing correction factors should be revised, so that the south orientation room is comfort in cloudy day. For energy conservation, the north exterior window should be smaller than the south exterior window.