夏热冬暖地区EPS复合墙体性能及应用研究

发布时间：2018-07-05 13:31

本文选题：EPS复合墙体 + 夏热冬暖地区　；参考：《福建农林大学》2017年硕士论文

【摘要】：论文针对以福建省、广东省为代表的夏热冬暖地区而新开发的一种EPS复合墙体为研究对象。该复合墙体系通过连接桥将按自下而上顺序错缝搭接EPS模块(发泡聚苯乙烯保温板)连接成空腔构造,并在连接桥上放置钢筋,然后向空腔注入混凝土而构成的保温承重一体化墙体,其特点是模块可根据工程需要予以拆除或保留,拆除下来的模块可多次重复利用,节省工程造价。论文的主要工作包括:首先,借鉴寒冷地区和夏热冬冷地区EPS墙体的应用研究成果,进行一种新型EPS复合墙体的开发设计、热工性能计算及施工工艺研究;其次,借助ANSYS软件,对所开发的EPS复合墙体开展非线性有限元分析,考察高宽比、混凝土等级、轴压比、配筋率等因素对墙体承载力和延性的影响;最后,采用ANSYS和PKPM软件建立一个三层三开间的房屋实体模型,进行层间位移及位移角等地震响应特性分析,考察房屋安全性能,并提出合理的构造建议。主要研究结论如下:1)所开发的EPS复合墙体热工性能优良且施工快捷,采用单侧模块构造,即可满足夏热冬暖地区保温隔热要求;EPS复合墙体的混凝土厚度为120mm时,即完全满足夏热冬暖地区墙体受力及安全性能的要求。2)试件高宽比对墙体承载能力和延性有很大影响,墙体承载能力随高宽比的增大而降低,而延性则相反;高宽比在0.8～2.0范围内,承载力和延性与其近乎成线性关系;构件极限承载力随轴压比的提高而增加,但却伴随着延性系数的降低,工程中宜选用合理的轴压比。3)提高混凝土强度等级能增大承载能力,但效果不明显,且对极限位移及延性作用不大,工程中宜采用C20～C30混凝土;一定的配筋率对结构位移及延性具有提高作用,建议低层EPS复合墙体的配筋率取0.2%左右。4)在自重及其他荷载作用下,EPS复合墙体房屋主要发生竖向变形,且门窗洞口易产生应力集中,工程中应采取增加配筋或约束边缘构件等措施。上述研究成果可为夏热冬暖地区EPS复合墙体有关技术规程的制定提供参考依据,并为其工程应用奠定基础。
[Abstract]:In this paper, a new type of EPS composite wall is developed in Fujian Province and Guangdong Province, which is represented by hot summer and warm winter. The composite wall is constructed by connecting the bottom up order staggered EPS module (foam polystyrene insulation board) through a connecting bridge and placing steel bars on the connection bridge. Then the integral wall of heat preservation and bearing is formed by injecting concrete into the cavity. The characteristic of the wall is that the module can be removed or retained according to the need of the project, and the removed module can be reused many times and the cost of the project can be saved. The main work of this paper includes: firstly, using the application research results of EPS wall in cold area and hot summer and cold winter area for reference, the development and design of a new type of EPS composite wall, the calculation of thermal performance and the construction technology are carried out; secondly, with the help of ANSYS software, The nonlinear finite element analysis of the developed EPS composite wall is carried out, and the effects of aspect ratio, concrete grade, axial compression ratio and reinforcement ratio on the bearing capacity and ductility of the wall are investigated. By using ANSYS and PKPM software, a three-story and three-compartment model is built to analyze the seismic response characteristics such as interstory displacement and displacement angle. The safety performance of buildings is investigated and some reasonable construction suggestions are put forward. The main conclusions are as follows: (1) the thermal performance of EPS composite wall is excellent and the construction is quick. The concrete thickness of EPS composite wall can meet the requirement of heat preservation and heat insulation in hot summer and warm winter area when the concrete thickness of the wall is 120mm. That is to say, it fully meets the requirement of stress and safety performance of wall in hot summer and warm winter. 2) the ratio of height to width has great influence on the carrying capacity and ductility of the wall. The bearing capacity of the wall decreases with the increase of the ratio of height to width, but the ductility is opposite. When the aspect ratio is in the range of 0.8 ~ 2.0, the bearing capacity and ductility are almost linear, and the ultimate bearing capacity increases with the increase of axial compression ratio, but with the decrease of ductility coefficient. A reasonable axial compression ratio of .3) can increase the bearing capacity of concrete, but the effect is not obvious, and it has little effect on the ultimate displacement and ductility. C20C30 concrete should be used in the project. A certain reinforcement ratio can improve the displacement and ductility of the structure. It is suggested that the reinforcement ratio of the low-rise EPS composite wall should be about 0.2%.) under the action of self-weight and other loads, the main vertical deformation of the EPS composite wall building is observed. The stress concentration is easy to occur at the entrance of doors and windows, so some measures should be taken to increase the reinforcement or restrain the edge members in the engineering. The above research results can provide a reference basis for the formulation of relevant technical specifications of EPS composite wall in hot summer and warm winter area and lay a foundation for its engineering application.
【学位授予单位】：福建农林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU551;TU761.12

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