预制装配式剪力墙结构连接构造优化及抗震性能研究

发布时间：2018-02-28 20:26

本文关键词： 预制剪力墙结构水平连接竖向连接拟静力试验抗震性能有限元分析　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：以建筑工业化为基础的的住宅产业化模式日益成为我国住宅建设发展的新方向,将预制装配技术和剪力墙结构相结合形成预制装配整体式剪力墙结构是适合我国住宅产业化进程的一种建筑结构形式。对于预制剪力墙结构,上下层预制墙体之间的水平拼缝以及同一层相邻墙体之间的竖向拼缝的可靠连接,是保证其整体性及抗震能力的关键。为了推广装配式混凝土剪力墙结构在实际工程中的应用,本文先进行前期探索性试验研究,通过试验研究了2个水平连接采用扣接封闭箍筋约束金属波纹管浆锚连接的预制装配式一字形剪力墙试件在不同轴压比下的抗震性能,并分别与现浇试件进行对比分析,验证了这种水平连接方式能够确保竖向钢筋牢固连接。随后进一步研究了2个采用相同水平连接方式、而竖向连接采用扣接封闭箍筋约束竖向钢筋环插连接的预制装配式工字形剪力墙试件在不同轴压比下的抗震性能,也分别与现浇试件进行了对比分析。试验结果表明：(1)预制装配式一字形剪力墙试件在滞回耗能、承载能力和延性方面均优于现浇试件,其破坏形态和刚度曲线与现浇试件相似。预制试件展现出的抗震性能优异,说明扣接封闭箍筋能够有效的约束边缘构件区域的核心混凝土,保证竖向钢筋的牢固连接,证实了水平连接采用扣接封闭箍筋约束金属波纹管浆锚连接的可靠性。(2)预制装配式工字形剪力墙试件在滞回性能、承载能力、等效刚度、耗能能力方面均优于现浇试件,说明水平连接采用扣接封闭箍筋约束金属波纹管浆锚连接、竖向连接采用钢筋环插连接的构造方式能够保证墙体内钢筋的有效连接,有力的提升了预制墙的抗震性能。同时认为采用这两种连接方式的预制剪力墙,应用时可视为等同于现浇剪力墙结构。(3)本文采用有限元分析软件ABAQUS对8个剪力墙试件进行了非线性有限元分析,有限元分析结果与试验实测结果基本吻合,尤其是在峰值承载力、应力应变发展情况以及极限破坏状态方面符合良好,为今后预制剪力墙抗震性能研究提供了非线性分析方法。通过进行上述试验研究工作,结合施工现场的实际情况,认为文中提出的水平、竖向连接构造方式可应用于实际工程中,并分别从设计角度、有限元分析角度和施工操作角度这三个方面进行了阐述,为今后的设计工作和施工生产提供建议,对于推广预制装配式剪力墙结构的应用具有积极意义。
[Abstract]:The model of housing industrialization based on building industrialization is becoming a new direction of housing construction in our country. Combining prefabricated assembly technology with shear wall structure to form prefabricated integral shear wall structure is a kind of building structure which is suitable for the process of housing industrialization in our country. The reliable connection of horizontal joint between upper and lower story precast wall and vertical joint between adjacent wall on the same floor is the key to ensure its integrity and seismic resistance. In order to popularize the application of prefabricated concrete shear wall structure in practical engineering, In this paper, a preliminary exploratory experimental study was conducted to study the seismic behavior of two prefabricated one-zigzag shear wall specimens connected with metal corrugated pipe with buckle and closed stirrups under different axial compression ratios. Compared with the cast-in-place specimens, it is proved that the horizontal connection can ensure the solid connection of the vertical steel bar. Then, two of them are further studied in the same horizontal connection mode. The seismic behavior of prefabricated I-shaped shear wall specimens with hoop insertion connection with buckled closed stirrups is obtained under different axial compression ratios. The test results show that the prefabricated one-zigzag shear wall specimens are superior to cast-in-place specimens in terms of hysteretic energy consumption, load-carrying capacity and ductility. The failure patterns and stiffness curves are similar to those of cast-in-place specimens. The prefabricated specimens exhibit excellent seismic performance, which shows that the sealing stirrups can effectively restrain the core concrete in the edge member area and ensure the solid connection of vertical steel bars. It is proved that the reliability of horizontal connection with metal corrugated pipe with buckling closed stirrups is superior to that of cast-in-place specimens in hysteretic performance, load-carrying capacity, equivalent stiffness and energy dissipation capacity. The prefabricated I-shaped shear wall specimens are superior to cast-in-place specimens in terms of hysteretic performance, load-carrying capacity, equivalent stiffness and energy dissipation capacity. It is shown that the horizontal connection is connected with metal corrugated pipe, and the vertical connection is constructed by the ring insertion of steel bar, which can ensure the effective connection of the reinforcing bar in the wall. At the same time, the precast shear wall with these two kinds of connections is considered to be a prefabricated shear wall. In this paper, the nonlinear finite element analysis of eight shear wall specimens is carried out by using the finite element analysis software ABAQUS. The results of the finite element analysis are in good agreement with the experimental results. Especially in the aspects of peak bearing capacity, stress-strain development and ultimate failure state, a nonlinear analysis method is provided for the future study of seismic behavior of precast shear walls. Combined with the actual situation of the construction site, it is considered that the horizontal and vertical connection construction mode proposed in this paper can be applied to the practical engineering, and the design angle, the finite element analysis angle and the construction operation angle are described respectively. It is of great significance to popularize the application of prefabricated shear wall structure.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU352.11;TU398.2

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