预制开洞内嵌钢板装配式剪力墙结构抗震性能分析

发布时间：2018-03-10 08:40

本文选题：内嵌钢板　切入点：装配式剪力墙　出处：《天津大学》2014年硕士论文　论文类型：学位论文

【摘要】：基于目前装配式剪力墙结构中存在的墙体构件自重大的问题,提出一种新型预制剪力墙构件:将预制剪力墙设计成开洞墙体,洞口内嵌钢板,旨在通过开洞减轻构件自重,降低构件吊装和运输压力,同时通过钢板屈曲变形提高构件的延性和耗能能力。本文通过构件和结构两个层面进行分析研究:1)通过对单层开洞内嵌钢板剪力墙结构构件进行拟静力往复加载分析,得出构件的滞回曲线,通过试件的恢复力曲线判定构件的承载力和耗能能力;进行ABAQUS单向推覆分析,研究该新型结构构件抗震性能的影响因素,并探讨不同参数下构件的破坏机制;2)依托于一栋装配式剪力墙结构实际工程,提取其中一片剪力墙深入研究,通过对由普通墙构件和本文提出的新型预制墙体构件组成的两种结构体系进行罕遇地震下弹塑性时程分析,进一步比较整体结构的变形和耗能能力。通过以上对比分析,可得到以下结果:1)通过开洞能够降低预制墙体构件自重,提高构件的延性,但构件本身的刚度和承载力有较大的降低;通过洞口内嵌钢板能够较好的恢复结构的整体刚度和承载能力,同时相对普通墙延性和耗能能力也有较大的提高;2)通过参数分析,可以得出内嵌钢板的高厚比、跨高比以及周边墙肢的刚度是影响开洞内嵌钢板装配式剪力墙结构抗震性能的重要参数。在本文研究参数范围内,当钢板高厚比小于150时,结构的破坏由整体破坏向单个墙肢局部破坏转移,钢板屈曲后性能发挥不明显,因此钢板厚度不宜过大,建议钢板高厚比取值不小于150;3)对于整体结构分析可得出,开洞后加入薄钢板能够延长结构的周期,降低结构的地震反应,同时提高结构的变形能力。本研究首次提出新型开洞内嵌钢板装配式剪力墙结构形式,国内外未见相关报道和研究,同时通过构件和结构层面的对比分析,对提出的新型装配式剪力墙结构进行了系统的分析验证,得出开洞内嵌钢板装配式剪力墙结构是一种具有优良抗震性能的结构形式。
[Abstract]:Based on the self-important problem of the wall members in the present fabricated shear wall structure, a new type of prefabricated shear wall member is proposed: the precast shear wall is designed as the opening wall and the steel plate embedded in the hole, in order to reduce the weight of the member through the opening. Reduce the lifting and transportation pressure, At the same time, the ductility and energy dissipation capacity are improved by buckling deformation of steel plate. The hysteretic curve of the member is obtained, the bearing capacity and energy dissipation capacity of the member are determined by the restoring force curve of the specimen, and the influencing factors of the seismic behavior of the new structural member are studied by ABAQUS one-way push-over analysis. The failure mechanism of components under different parameters is also discussed, which is based on a practical engineering of an assembled shear wall structure, and one of the shear walls is extracted for further study. Through the elastoplastic time history analysis of two kinds of structural systems, which are composed of ordinary wall members and new precast wall members proposed in this paper, the deformation and energy dissipation capacity of the whole structure is further compared under rare earthquakes. The following results can be obtained: (1) the weight of precast wall members can be reduced and the ductility of precast wall members can be improved by opening holes, but the stiffness and bearing capacity of the members themselves are greatly reduced; Through the hole inlay steel plate can better restore the overall stiffness and bearing capacity of the structure, at the same time compared with the ordinary wall ductility and energy dissipation capacity has been greatly improved) through the parameter analysis, we can get the ratio of height and thickness of the embedded steel plate. The ratio of span to height and the stiffness of peripheral wall limb are important parameters that affect the seismic performance of steel plate embedded shear wall structure in the hole. In the range of parameters studied in this paper, when the ratio of height to thickness of steel plate is less than 150, The damage of the structure is transferred from the whole failure to the local failure of a single wall limb, and the performance of the steel plate after buckling is not obvious, so the thickness of the steel plate should not be too large, and it is suggested that the ratio of height to thickness of the steel plate should be not less than 150 ~ 3) the analysis of the whole structure can be obtained. The period of the structure can be prolonged, the seismic response of the structure can be reduced and the deformation ability of the structure can be improved by adding thin steel plate after opening. In this study, a new type of steel plate embedded prefabricated shear wall structure is proposed for the first time. No related reports and studies have been reported at home and abroad. At the same time, through the comparative analysis of components and structures, the proposed new prefabricated shear wall structure has been systematically analyzed and verified. It is concluded that the prefabricated shear wall structure with steel plate embedded in the hole is a kind of structure with excellent seismic performance.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398.2;TU352.11

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