多层砌体结构开洞墙体整体破坏模式试验研究

发布时间：2019-02-27 08:28

【摘要】：砌体结构是目前国内外广泛采用的建筑结构类型之一。相对于其他类型的结构,它具有诸多自身的优点,但由于其抗震性能相对较弱,部分砌体结构在抗震设防方面的应用受到了一定的限制。近年来的实际震害调查结果表明,砌体结构亦可能具有良好的抗震性能,特别是窗下墙先于窗间墙破坏的砌体结构。国内外许多学者已在近年来的震害调查中发现了这一现象,并根据调查结果初步构建了多层砌体结构破坏模式的理论。本论文将通过多层砌体结构整体开洞墙体的试验研究,验证目前对多层砌体结构破坏模式的认识,并进一步揭示砌体结构在地震作用下的破坏规律,为进一步展开理论研究奠定基础。论文的主要研究内容包括:(1)对比选取合理的有限元分析方法,对砌体结构整体开洞墙体进行力学分析,确定三种破坏模式的砌体结构整体开洞墙体的几何与力学参数,为砌体结构整体开洞墙体的试验设计提供依据。(2)按三种破坏模式的设想,制作三片无筋无圈梁多层砌体结构的开洞墙体试件,对其进行拟静力低周往复水平加载试验,观测试件在拟静力低周往复水平荷载作用下的抗震性能。(3)总结分析试验数据,验证目前根据震害调查结果初步建立的多层砌体结构墙体破坏模式理论,进一步定量地揭示多层砌体结构开洞墙体的整体破坏规律。论文研究成果表明,建立的有限元分析模型能够准确的反映砌体结构整体开洞砌体在地震作用下的受力性能,预期的三种不同的破坏模式均在试验中得到了实现;目前震害调查中对多层砌体结构破坏模式的认识得到试验的验证;影响多层砌体结构整体开洞墙体破坏模式的主要因素是窗间墙和窗下墙的相对刚度比;这些成果为进一步的理论研究奠定了更好的基础。
[Abstract]:Masonry structure is one of the types of building structure widely used at home and abroad. Compared with other types of structures, it has many advantages of its own, but because of its relatively weak seismic performance, the application of some masonry structures in seismic fortification has been limited to a certain extent. The results of actual earthquake damage investigation in recent years show that masonry structure may also have good seismic performance, especially the masonry structure with lower window wall before the failure of window wall. This phenomenon has been discovered by many scholars at home and abroad in recent years, and the theory of failure mode of multi-story masonry structure has been preliminarily constructed according to the investigation results. This paper will verify the current understanding of the failure mode of multi-story masonry structure and further reveal the failure law of masonry structure under earthquake through the experimental study on the integral opening wall of multi-story masonry structure. It lays a foundation for further theoretical research. The main research contents of this paper are as follows: (1) the reasonable finite element analysis method is selected to analyze the mechanics of masonry structure with integral opening wall, and the geometric and mechanical parameters of the whole opening wall of masonry structure with three failure modes are determined. (2) according to the assumption of three failure modes, three specimens of multi-story masonry wall with no reinforcement and no ring beam are made, and the quasi-static low-cycle reciprocating horizontal loading test is carried out on it, and the results are as follows: (1) the experimental results are as follows: (1) according to the assumption of three failure modes, the experimental results are as follows: (1) The seismic behavior of the specimen under quasi-static low cyclic horizontal load is observed. (3) the experimental data are summarized and analyzed to verify the failure mode theory of multi-story masonry structure, which is established preliminarily according to the results of earthquake damage investigation. Furthermore, the whole failure law of multi-story masonry structure with opening wall is revealed quantitatively. The research results show that the finite element analysis model can accurately reflect the mechanical performance of masonry structures with openings under earthquake, and the three expected failure modes are realized in the test. At present, the recognition of the failure mode of multi-story masonry structure in earthquake damage investigation has been tested and verified, and the main factors affecting the failure mode of multi-story masonry structure are the relative stiffness ratio of the wall between the windows and the wall under the window, the main factors affecting the failure mode of the multi-story masonry structure. These achievements lay a better foundation for further theoretical research.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU364;TU312.3

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