多層砌體結(jié)構(gòu)開洞墻體整體破壞模式試驗(yàn)研究
[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.
【學(xué)位授予單位】:西安建筑科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TU364;TU312.3
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