Applied Mechanics and Materials Vols. 672-674

Abstract: In recent years, ‘passive house’ is an increasingly well-known word, and has gained rapid popularity and application in Europe and other developed countries. Currently, residential passive house is growing at 8% annually in Europe. With its low energy consumption and ultra-high comfort, it is acclaimed as the most promising energy-saving substitute of conventional residences of this century. The passive houses in Hamburg Germany use 75% less energy than the normal low-energy buildings, more than 90% less than conventional German buildings ^[1]. As reported by the National Conference of Green Building Materials and German Passive House Technology held from 22nd to 25th April 2014, passive house will certainly become the mainstream building in the country in the next three to five years.

Abstract: In order to study anchor relaxation of pressure dispersive retaining wall, the numerical simulation model was designed to simulate the retaining wall with single anchor plate. The results showed that the pressure dispersive retaining wall had good overall stability. Anchor Relaxtion had two sudden changes. As a result, the lateral soil pressure near the anchor had been released and the displacement Significantly increased.

Abstract: The basic concepts and characteristics of CCHP system and the configuration scheme of the system are introduced in this paper. On this basis, in this paper, it uses the operating mode of the combination method of power decided by heat and heat decided by power, and establishes a linear programming model that makes total year’s costs as optimize targets. Using LINGO software, it has got the result of simulation and calculation with the architecture’s dynamic load, and has got the architecture’s annual hourly distributed data of cold, heat and electricity load, and got the best equipment configuration and operating strategy, and got to evaluate the optimize results of energy efficiency and economy.

Abstract: In view of energy consumption characteristics of a typical industrial park, to further improve the low-grade waste heat utilization of CCHP system, an improved CCHP triple-generation system (ITRI) equipped with thermal storage device (TSD) and electric chiller (EC) is proposed. A comprehensive performance evaluation criterion (CPEC) is established, the capacity of triple-generation system is configured by using nonlinear programming method. A hybrid operating mode optimization strategy is proposed based on the different CPEC values of different operating mode. The results demonstrate that: after adopting ITRI, compared with traditional triple-generation system (TTRI), although annual cost increased by 0.63%, the primary energy consumption rate and lower carbon dioxide emissions decreased by 5.45% and 3.72% respectively, CPEC value increased by 19.7%. This paper has a theoretical guidance for design of triple-generation system in new industrial park and has a certain reference value for operating mode optimization of triple-generation system in the industrial parks which has been built.

Abstract: The equivalent thermal conductivity coefficient of 10 kinds of sintered shale porous brick with different void number, void ratio, and arrangement (size: 240mm x 190mm x 90mm) are studied through 3D numerical simulation. An optimal structure design of the shale perforated brick design has been obtained. At the same time, factors such as void ratio, void number and arrangement of porous brick affected thermal insulation performance are systematically analyzed, which provides a reference to further improving the thermal insulation performance of insulation sintered shale porous brick model.

Abstract: Concrete has been one of the most widely used materials in Engineering, which also induced the problems of vegetation destruction, soil erosion, and even deterioration for ecosystems. The ecological concrete was proposed to reinforce the slope due to its characteristics of high strength and large porosity to ensure the growth of plants. However the high alkalinity for ordinary portland cement constrained the growth of plants. An experimental test including 15 groups of samples was carried out to evaluate the effects of materials including polycarboxylate superplasticizer, calcium carbonate, ammonium bicarbonate, potassium dihydrogen phosphate, silica fume, ferrous sulfate and calcium lignosulfonate on pH value for ecological concrete. Under the condition that the compressive strength and porosity meet the requirement of ecological concrete, two sets of additives were proposed, which are suitable for the slope with high strength and the slope with low alkalinity requirements respectively.

Abstract: The dynamic performance of the 12m span prestressed concrete beam is analyzed by finite element method. Based on the finite element analysis, with the change of the peak dynamic load, the risetime of dynamic load and the reinforcement ratio of prestressed reinforcement, the change laws of mid-span maximum deflection and the maximum stress of prestressed reinforcement in prestressed concrete beam are studied. At the same time, have further understanding to the stress and deformation of the prestressed concrete beam under explosive load. It can provide references for study on dynamic performance of the prestressed concrete beam under explosive load.

Abstract: In order to describe the bending property of sandwich beam with wood skin and binderless bamboo chips core, the effect of construction parameters and material type on bending normal stress and moment was analyzed systematically. It is shown that maximum bending normal stress of sandwich construction is bigger than homogeneous single layer beam with same cross section if the skin has higher modulus than the core. The bending moment can be taken almost by skin layer if the core modulus is much smaller than skin materials and core thickness should also be smaller to special point than total cross section. As for wood-bamboo sandwich composite, the core resistance to bending moment should be considered. The results can provide basic theory for design optimization of sandwich construction.

Abstract: This article discussed the basic theory and routes for preparing soda-lime-silicate glass by filter mud in beet sugar refinery. The proportion of raw materials and processing conditions were optimized.The research shows that amber glass and green-white glass prepared can meet national standards and the technology was reliable, easy, high benefit both on economical and social effects and without secondary waste .

Abstract: Results of numerical modeling of thermogravitational convection are presented in article in an air layer of systems of rear ventilated facades, dependences of velocity of air and stream temperature on geometrical parameters of an air gap are received.