框架开洞砌体填充墙平面外受力性能研究

发布时间：2018-06-13 00:34

本文选题：框架填充墙 + 平面外受力性能　；参考：《长沙理工大学》2015年硕士论文

【摘要】：框架结构是目前广泛使用的建筑结构形式。地震时,大量填充墙的破坏、倒塌给人们的生命财产安全带来了巨大的威胁。随着地震的频发,填充墙在结构设计中的问题不断涌现,其地震安全性逐渐受到研究人员的重视,尤其是平面外荷载作用下填充墙对框架结构受力性能影响研究还相当匮乏。实际工程结构中,往往会在墙体上开设洞口以满足其在使用上的需求,因此,对框架开洞砌体填充墙结构进行平面外受力性能的研究具有相当重要的工程理论意义。本文结合已有的关于框架填充墙结构受力性能方面的研究成果,利用ANSYS软件,对框架开洞砌体填充墙进行以下几个方面的研究:(1)建立了框架填充墙结构非线性有限元ANSYS分析模型,并用所建模型对已有的一个试验模型进行有限元分析,发现数值模拟结果和试验结果吻合,验证了所建模型的合理性。(2)采用所建模型对二层单跨框架填充墙结构进行非线性数值模拟,分析了洞口位置及开洞率对框架结构受力性能的影响,结果表明:洞口的存在降低了框架填充墙平面外承载力、刚度及抗震性能,且开洞率越大,降低的幅度越大;洞口大小一定时,改变洞口位置对整体结构的受力性能有显著影响,当洞口紧贴框架柱时,整体结构的受力性能最差,洞口居中时次之,而洞口只偏置一段距离时,整体结构的受力性能最好。(3)考虑高厚比、高宽比、砌体抗压强度及摩擦系数的影响,建立了二层单跨框架实体填充墙ANSYS结构分析模型,研究了四个参数对砌体填充墙平面外受力性能的影响规律,结果表明:改变填充墙的高厚比、高宽比及砌体抗压强度对整体结构平面外受力性能有明显影响,而改变摩擦系数,对整体结构平面外受力性能的影响不大。
[Abstract]:Frame structure is a widely used form of building structure. During the earthquake, the destruction of a large number of filled walls, the collapse of people's lives and property has brought a great threat to the safety. With the frequent occurrence of earthquakes, the problems of infilled walls in structural design are constantly emerging, and the seismic safety of infilled walls has been paid more and more attention by researchers. Especially, the research on the effects of infilled walls on the behavior of frame structures under out-of-plane loads is still rather scarce. In practical engineering structures, openings are often opened on the wall to meet the needs of application. Therefore, it is of great significance to study the out-of-plane mechanical behavior of the frame open-hole masonry filled wall structure. In this paper, based on the existing research results on the mechanical behavior of frame infilled wall structure, the ANSYS software is used. The nonlinear finite element ANSYS analysis model of frame infilled wall structure is established, and the existing experimental model is analyzed with the established finite element analysis model. It is found that the numerical simulation results are in agreement with the experimental results, which verifies the rationality of the proposed model. (2) the nonlinear numerical simulation of the two-story single-span frame infilled wall structure is carried out by using the established model. The influence of orifice location and opening rate on the mechanical behavior of frame structure is analyzed. The results show that the existence of the opening reduces the out-of-plane bearing capacity, stiffness and seismic performance of the frame filled wall, and the larger the opening ratio, the greater the reduction amplitude. When the size of the hole is constant, changing the position of the hole has a significant effect on the mechanical performance of the whole structure. When the opening is close to the frame column, the mechanical performance of the whole structure is the worst, the middle of the hole is the second, and the hole is only offset a distance. Considering the influence of the ratio of height to thickness, aspect ratio, masonry compressive strength and friction coefficient, the ANSYS structural analysis model of two-story single-span frame infilled wall is established. The influence of four parameters on the behavior of the masonry wall outside the plane is studied. The results show that changing the ratio of height to thickness, the ratio of height to width and the compressive strength of masonry have obvious effects on the mechanical performance of the whole structure outside the plane, but the friction coefficient is changed. It has little effect on the behavior of the whole structure outside the plane.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU398

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