窗下墙对预制混凝土剪力墙结构抗震性能影响的试验研究

发布时间：2018-01-16 07:07

本文关键词：窗下墙对预制混凝土剪力墙结构抗震性能影响的试验研究　出处：《合肥工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：在预制装配式混凝土剪力墙结构中,为进一步提高施工效率,往往采用将填充墙以及窗洞下方的墙与预制剪力墙作为一个整体共同在工厂内进行预制的方法。此时,为了减轻结构自重,并降低填充墙和窗下墙的强度和刚度,以减小其对主体结构抗震性能的影响,可在填充墙和窗下墙内设置一定厚度的减重材料(如泡沫塑料板等)。然而,采用这种构造方式能否实现预制混凝土剪力墙结构预期的抗震性能目标有待通过研究加以验证。为研究填充量和窗下墙对预制混凝土剪力墙结构抗震性能的影响,本文进行了一个单层带填充墙预制混凝土剪力墙试件和两个两层带窗下墙预制混凝土剪力墙试件的拟静力试验。两个两层带窗下墙预制混凝土剪力墙试件的主要区别是二层窗下墙的高度。试验结果表明:填充墙在与预制剪力墙作为整体预制后改变了结构的受力性能,试件受力性能和破坏模式与联肢剪力墙有较大差别,按照填充墙作为非结构构件计算模型不能真实反映试件的受力状态;两个两层带窗下墙试件在初始受力阶段,窗下墙与下层连梁作为一根整体连梁共同工作,此后二者逐渐脱开,形成两根并列布置的双连梁;两个两层带窗下墙试件的破坏形态均为墙肢底部和双连梁两端形成塑性铰,最终塑性铰区混凝土被压碎;窗下墙较高的试件W-2承载力和初始刚度均大于W-1,延性和耗能能力则小于W-1;预制剪力墙构件中的窗下墙可显著提高该类构件的刚度、承载力和耗能能力,对带窗下墙的预制剪力墙结构进行抗震设计时应对窗下墙予以考虑。在试验的基础上,采用ABAQUS软件对两个两层带窗下墙开洞预制混凝土剪力墙试件W-1和W-2进行了数值模拟分析,分析结果与试验结果对比表明该模型可以较好地反映窗下墙对预制剪力墙构件抗震性能的影响,具有一定的可靠性。
[Abstract]:In the prefabricated concrete shear wall structure, in order to further improve the construction efficiency. It is often used to prefabricate the infilled wall and the wall under the window hole with the prefabricated shear wall as a whole in the factory. At this time, in order to reduce the structural weight. The strength and stiffness of the infilled wall and the wall under the window can be reduced to reduce the influence on the seismic performance of the main structure, and a certain thickness of weight-reducing materials (such as foam plastic board, etc.) can be set up in the infilled wall and the wall under the window. Whether we can achieve the expected seismic performance target of precast concrete shear wall structure by this construction method needs to be verified by research. To study the effect of filling quantity and wall under window on seismic performance of precast concrete shear wall structure. . In this paper, quasi static test of precast concrete shear wall specimen with single layer filled wall and two prefabricated concrete shear wall specimens with two two layer windows are carried out. The main results of precast concrete shear wall specimen with two layers with windows. The difference is the height of the wall under the two-story window. The test results show that:. The mechanical behavior of the structure is changed after the prefabricated wall and the prefabricated shear wall as a whole. The mechanical behavior and failure mode of the specimens are different from those of the shear walls, and the calculation model based on the infilled walls as non-structural members can not truly reflect the stress state of the specimens. In the initial loading stage, the wall under the window and the connecting beam under the window work together as a whole connecting beam, and then they are gradually separated and formed two parallel double connected beams. The failure patterns of the specimens under the two layers with windows are plastic hinge formed at the bottom of the wall limb and the two ends of the double beam, and the concrete in the plastic hinge zone is crushed. The higher W-2 bearing capacity and initial stiffness of the wall under the window are larger than W-1, but the ductility and energy dissipation capacity are smaller than W-1. The window wall in the precast shear wall members can significantly improve the stiffness, bearing capacity and energy dissipation capacity of this kind of members. In the seismic design of precast shear wall structures with windows, consideration should be given to the wall under windows. ABAQUS software was used to simulate and analyze the specimens W-1 and W-2 of precast concrete shear wall with two layers of windows. The comparison between the analysis results and the experimental results shows that the model can well reflect the influence of the wall under the window on the seismic performance of the precast shear wall members and has certain reliability.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11;TU398.2

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