Applied Mechanics and Materials Vols. 71-78

Abstract: Vacuum insulation panel is regarded as one of the most promising high performance thermal insulation materials for green building. It has extremely low thermal conductivity and its insulation performance is a factor of four to eight times better than that of conventional insulation such as mineral wool or polymer foams. The high thermal resistivity of VIP provides new solutions for slim but still energy efficient building envelopes. Although VIP has widely been used in refrigerators and freezers for a long time, it has only recently been discovered by the building sector. There is not yet any alternative for conventional thermal insulation materials in many countries, especially in China. This paper attempts to investigate the components, features and advantages of VIP for building, it will be helpful to the development of green building.

Abstract: In view of inadequate post-games use of large and medium-sized stadiums both internationally and domestically, this thesis introduces several modes that represent the flexibility and multi-functionality of sports building design in our country. It aims to improve the availability of sports facilities and show wider adaptability of stadiums as well as to accelerate the development of nationwide fitness campaign and sports undertakings.

Abstract: Hemp fiber is an excellent sustainable and renewable alternative to glass fiber as a reinforcing component in composite system, owing to its unique features of fast growth, high mechanical strength, low density, low cost, biodegradable, and low energy consumption. In this study a systematic investigation of physical and chemical treatment on hemp fiber was conducted, and their effects on thermal stability of hemp fiber were analyzed. Oxygen plasma treatment was used as physical modification approach, 5 wt% sodium hydroxide solution was used for chemical modification. Surface chemical composition and thermal stability were characterized by Fourier transform infrared spectroscopy and thermo gravimetric analysis. The results indicated that 5 wt% of NaOH with 16 hours treatment time increased hemp fiber thermal stability, while the plasma treatment had no impact on thermal stability of hemp fiber.

Abstract: Adaptive Building Envelope was discussed in recent years and became a possible solution for energy efficiency. We conducted a study of kinetic building envelopes for energy efficiency in the context of an interdisciplinary design & modeling course in 2010 Fall. The goals of these experimental design & modeling projects are to explore the possibilities of motion modes, the integration with whole envelopes and the potentials of applications, and to provide insight into sustainable design. This paper provides an experimental account of kinetic logics and products, and summarizes kinetic motion patterns and potential applications.

Abstract: It is an important issue for engineers and technicians that how to conduct safe identification and earthquake resistant strengthening of the primary and secondary school buildings after Wenchuan earthquake. The paper comprehensively reviewed aspects of quality detection, safety identification and strengthening design of the primary and secondary school buildings in Xi’an district. To address existed security risks, construction progress, construction complexity and period were comprehensively considered to choose corresponding seismic strengthening method based on seismic qualification and site survey. Project proposal was given according to problems in the design, which provides reference to design and construction of following similar projects.

Abstract: An internal supporting structure because of its low cost, construction speed, and high efficiency in the construction of municipal works in the deep foundation pit enjoys a great advantage. In this paper, ZhongYuan West Road, the actual construction of water pipeline project, describes the mechanical characteristics，the design and construction of the internal supporting structure, It is summarized for an internal supporting structure in deep excavation of accumulated experience.

Abstract: Small cities (including small towns) make contribution rate of 94% to the process of urbanization in the last century's accelerating development of urbanization. Accompany with this special industrialization and urbanization background, the typical way of work-live settlements gradually formed. Via studying on the feature of Work-live settlements, this paper plans to discover the living mode of the southern small towns in feature of region, so as to produce significant meaning to the residential environment construction of Yangtze River delta. Besides, through introducing the concept of interface and the characteristic of interface superposition, this paper puts forward primary study and discussion aiming at the interface space.

Abstract: A series of polypropylene/ethylene-propylene-diene monomer / calcium silicate (PP/EPDM/CaS) composites with different contents was prepared by melt processing using a twin-screw extruder. The composites were characterized. The results showed the particle shape of calcium silicate is honeycomb structure . The heat deflection temperature of PP/EPDM/CaS composite increased with increasing CaS content. The composites had highest tensile strength and the lowest when CaS content was 9.5 phr and 35 phr respectively.

Abstract: Jinoping No.1 is a dominant reservoir cascade hydropower station which locates at the downstream of Yalong river. The underground powerhouse locates at the right bank of the dam, lithology is marble that belongs to the second member of Zagunao group. It is constructed at region with very complicated geological conditions and high geo-stress. Concrete cracking, spalling and steel buckling and bending occurred at the downstream crown after supporting. This paper analysed the causes of deformation and failure through geological analysis and numerical simulation, and concluded that deformation and failure mainly occurred at the region where the quality of surrounding rock belongs to Ⅲ1 and had nothing to do with the unstable block cut by cracks; stress field of surrounding rock varied continueously with the proceeding of successive excavation of underground powerhouse, so the compressive stress and shear stress concentration occurred which caused the compression and shear failure of downstream crown and made it bending to the free face. It is significant to the further enforcement of this project and to the research on other similar underground caverns theoretically and practically.

Abstract: On the basis of research on digital circuit fault diagnosis system for missile launch and control system – one research project recently completed by the author ,and through analysis for the first and foremost problem of interface circuit, this paper makes a detailed description of digital circuit fault diagnosis interface circuit software design based on LabWindows/CVI, and gives major steps of the development for interface circuit software.