预制钢筋混凝土剪力墙板水平接缝钢板组合连接构造研究

发布时间：2018-12-11 11:30

【摘要】：预制装配式剪力墙结构是在建筑工业化形势下的一种预制装配式结构体系,通过工厂预制墙板,在现场采用水平接缝和竖向接缝连接装配成一体而形成的抗侧力结构体系。而接缝性能是影响预制装配式剪力墙结构体系整体性能的关键,目前对竖向作用下水平接缝结构体系抗震性能的研究成果较为系统,提出了不少连接方式,但工程实际中水平作用下存在墙体受拉不利工况下水平接缝装配式剪力墙结构体系抗震性能的研究成果匮乏,因此,对其进行研究就显得尤为必要。本文基于现有的相关研究成果,提出一种采用连接钢板、高强穿螺栓连接相邻层预制墙板的新型干式连接方式,为系统研究该连接对结构连体系受力性能的影响规律,以高强螺栓的间距作为设计参数,设计了3个预制试件,同时设计1个整体现浇试件作为对比试件。采用有限元软件ABAQUS进行建模,且通过相关试验对其合理性进行验证,并进一步在对本文设计试件进行系列数值模拟,分析相关参数及不同竖向作用对试件承载力、抗侧刚度退化规律、延性与耗能能力等抗震性能的影响规律,然后对节点的传力路径进行理论分析,与有限元模拟结果对比。研究结果表明:试件外在作用竖向拉力对试件抗震性能影响较为明显;水平接缝钢板组合连接的预制装配式剪力墙整体性较好,其抗震性能接近于整体现浇试件;本文提出的新型钢板组合连接方案可行,传力路径明确,连接件的强度有足够的富余;相对整体现浇试件,新型钢板组合连接的预制装配式试件在达到剪力墙结构大震层间侧移角限值1/120时,刚度下降较多,但其承载力仍未出现明显下降,试件的延性与耗能能力较好。现有混凝土本构难以真实反映混凝土在拉压往复作用下的的疏松脱落,以致模拟滞回曲线较为饱满,与试验结果存在一定偏差,但研究得出的结论能基本反映出剪力墙结构的性能,为其工程应用提供了理论参考。此外,建议在后续试验基础上进一步提出更合理的简化措施加以完善,以便更准确、系统模拟类似试件的抗震性能。
[Abstract]:The prefabricated shear wall structure is a kind of prefabricated structure system under the situation of building industrialization. Through the factory precast wall board, the horizontal joint and vertical joint are used in the field to assemble the anti-lateral force structure system. The joint performance is the key to affect the whole performance of prefabricated shear wall structure system. At present, the research results of seismic performance of horizontal joint structure system under vertical action are more systematic, and many connection modes are proposed. However, the seismic performance of horizontal joint assembled shear wall structure system under the unfavorable condition of wall tension under horizontal action in engineering practice is scarce, so it is necessary to study the seismic behavior of horizontal joint assembly shear wall structure system. Based on the existing research results, this paper proposes a new type of dry connection method, which is connected with steel plate and high strength bolt connecting adjacent layer precast wall board, and studies systematically the influence of the connection on the mechanical performance of the connecting structure. Taking the spacing of high strength bolts as the design parameter, three prefabricated specimens were designed, and a whole cast-in-place specimen was designed as a contrast specimen. The finite element software ABAQUS is used to model the model, and the rationality of the model is verified by relevant tests. Furthermore, a series of numerical simulation is carried out to analyze the bearing capacity of the specimens under different vertical actions and related parameters. The effects of lateral stiffness degradation, ductility and energy dissipation capacity on seismic performance are studied. Then the load transfer path of the joints is analyzed theoretically and compared with the results of finite element simulation. The results show that the external force of the specimen has obvious effect on the seismic performance of the specimen, and the precast assembled shear wall with horizontal joint steel plate composite connection has better overall seismic performance, and its seismic performance is close to that of the whole cast-in-place test piece. The new steel plate composite connection scheme presented in this paper is feasible, the force transfer path is clear, and the strength of the joint has enough surplus. Compared with the whole cast-in-situ specimens, the stiffness of prefabricated specimens with new steel plate composite connections decreases more when the limit of lateral displacement angle of shear wall structures reaches 1 / 120, but the bearing capacity does not decrease obviously. The ductility and energy dissipation ability of the specimen are better. The existing constitutive structure of concrete can not truly reflect the loose fall of concrete under the action of tension and compression, so that the simulated hysteretic curve is full, which is different from the test results. But the conclusion of the study can basically reflect the performance of shear wall structure and provide a theoretical reference for its engineering application. In addition, it is suggested that more reasonable simplified measures should be put forward on the basis of subsequent tests, so that the seismic behavior of similar specimens can be simulated more accurately and systematically.
【学位授予单位】：苏州科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU398.2

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