Applied Mechanics and Materials Vols. 448-453

Abstract: The two-dimensional finite element model for subgrade consolidation settlement analysis within soft soil pile is developed using ABAQUS. The numerical simulation on a highway subgrade deformation is performed to study the variation of consolidation settlement and the excess pore water pressure distribution in the central location and the part under centerline of the embankment. The results show that settlement develops gradually with the increasing period of soil consolidation. The excess pore water pressure of deep subgrade soils under embankment centerline rise due to the increased load. After each soil layer was filled, the excess pore water pressure increased in the first and was stable later along with the increase of soil depth. After the embankment soil was filled completely, excess pore pressure dissipated with time developing until the completion of consolidation.

Abstract: The corrosion behavior and fracture mechanisms of rock wool have been studied. After different corrosion test, morphologies of rock wool fibers were obtained using SEM. The leaching rate of non-siliceous cations was measured using ICP-MS. Elemental analysis and the structure of the fiber surfaces were investigated by SEM-EDS and XRD. The results revealed that the corrosion of rock wool fibers in sulfuric acid solution was primarily attributed to calcium, magnesium and aluminum ion depletion. Rock wool fiber dissolution begins by the exchange of network modifier ions via metal-proton exchange reactions, then a partial removal of network intermediate ions by Al,Fe-proton exchange reactions followed by the liberation of partially detached Si tetrahedrals.

Abstract: In this paper, the tailings dam material physical and mechanical properties of Jilin Banmiaozi Gold Mining Co., Ltd. is studied by using of penetration test, compression test, triaxial test, dynamic shear modulus ratio and damping ratio. According to the test results, the physical and mechanical material experimental data and the experimental curve for the materials are described. These data and curves can provide available basis for systematic analysis, mechanical characteristics analysis of dam materials and seismic dam stability analysis.

Abstract: In this paper, the software of DeST was used to simulate the heating energy consumption by the year of a typical energy-saving residential building in the city of Changchun. Comparing the energy consumption of the top and bottom,the middle room and the edges rooms ,we get the reasons for the uneven heating and put forward the corresponding solutions, which provide the reference for heating system design.

Abstract: High energy consumption has aroused serious consideration in the construction industry and energy industry. This article attempts to explore the implementation of environmentally friendly energy concept. It suggests that we should not only "look out" - to introduce foreign advanced environmental concepts to study, but also "look inward"- to study energy saving measures from the pattern and style of traditional architecture, such as adapting to the climate, obtaining materials from local sources, adjusting measures to local conditions, melting into the environment, paying attention to the group effect, etc.

Abstract: This paper establishes a model of turbolator with arc notches at its edges to simulation the heat transfer and flowing characteristics of hetat exchanger. Results show that notched turbolator apparently enhanced the heat transfer and changes form of flowing inside tube apparently.

Abstract: Compacted loss widely used in the construction, such as embankment, dam, foundation backfill and other projects. Influenced by rainfall factors, the moisture content of compacted loess often vary so the shear strength will also changed. This paper studies the shear strength parameters of compacted loess through direct shear tests. In the dry density under the same conditions, the cohesion, internal friction angle of compacted loess decreases with the increase of water content. Summed cohesion and water content showed a quadratic parabola and internal friction angle and water content was also found quadratic parabola; further considering the effects of water content and dry density of compacted loess got shear strength formula. Shear strength formula.

Abstract: Nowadays, exploiting of renewable energy resources has become an important research field, and it has been paid great attention to all over the world. This paper takes an energy saving renovation engineering of Huazhong University of Science and Technology (HUST) in Wuhan, Hubei province, as a case, and some energy-saving technical measures were put forward, such as Active Dynamic Ventilated Envelope (ADVW), climatic adaptive windows, underground cooling and heat sources, solar building integrated system and under floor air supply system, etc. In order to realize energy saving, land saving, water saving, material saving, environmental protection and reducing pollution, this building makes the best of renewable energy resources in order to realize low energy consumption, and the technical reference was provided for promoting application of renewable energy and building energy efficiency in hot-summer and cold-winter zone of China.

Abstract: As the largest amount of building in urban architecture, residential building brings enormous greenhouse gases emissions concerning energy and resource consumption and solid waste disposal during its construction and removal. On the basis of LCP theory, the carbon emission of a residential building in Shenyang was calculated in each stage of the life cycle. The calculation shows that the carbon emission in the use and maintenance stage accounts for 86%, the biggest proportion in its life cycle. The carbon emission of one square meter reaches 45.27kgCO2/(m2·y), higher than other cities in China. So the potential for Shenyang to save energy and reduce carbon is considerable. The low carbon objective can be achieved through reducing the use of fossil energy, improving residents energy saving awareness in the use stage and enforcing energy efficiency policies and measures. Meanwhile, from the perspective of research methodology, the carbon emission of a building is regionally featured. For instance, electric carbon emission coefficient is substantially influenced by local energy structure; the distance between building material production and transportation in different places is different; the carbon emission caused by the energy consumption during the usage of the building is closely associated with local energy saving policies and regulations.

Abstract: Building energy conservation is a research hotspot at present. In this paper, using energy simulation software DesignBuilder, we analyzed the influence of different external window materials on energy consumption of residential buildings and finally studied the energy saving rate and economical efficiency. The economical efficiency was analyzed from two aspects: the difference of net present value and the pay back period. The result shows that Low-e insulating glazing is good at both energy-saving potential and economic benefits. This paper provides a basis for the external window selection in hot summer and cold winter areas like Wuhan.