预制混凝土框架柱及节点抗震性能试验研究

发布时间：2018-10-26 12:58

【摘要】：建设节能省地环保型住宅越来越成为中国住宅建设的目标和方向。哈尔滨工业大学通过研究与探索，自主研发了约束浆锚钢筋搭接连接，解决了混凝土结构中预制构件的连接问题，并结合中国住宅领域的实际情况，提出了适合我国国情的预制混凝土连接方法：“约束浆锚钢筋搭接连接”，针对此种连接方式，进行了一系列的试验，并形成了具有自主知识产权的预制混凝土剪力墙结构体系。本文仍以约束浆锚钢筋搭接连接方式为切入点，首创提出了适合混凝土框架构件连接的多种构造方法，进行了框架柱纵筋连接和框架节点处梁柱连接的抗震性能试验。首先完成了9个足尺框架柱的拟静力试验，包括6个预制柱和3个现浇对比柱。对结构连接的受力性能、破坏形式以及各试件在水平往复荷载作用下的滞回曲线、骨架曲线、刚度退化等进行了分析，分析结果表明，采用约束浆锚插筋技术的两种预制框架柱的破坏模式与现浇柱相同，承载力接近，，而延性则优于对比件。另一方面，通过观察整体变形曲线以及对各项耗能指标进行比较，预制框架柱具有与现浇柱等同的承载力抗震性能和和更优的耗能性能。首创提出了三种不同的预制混凝土框架节点组装方式，并进行三个装配式足尺混凝土框架节点和一个现浇节点对比件的拟静力试验。通过试验分别得到了三种预制框架节点在往复荷载作用下裂缝开展的过程，并与对比件的受力所表现出的宏观现象进行对比分析，得到了三种组装方式下试件的滞回曲线、骨架曲线及刚度的退化情况，同时通过对试验数据的分析得到了节点耗能能力的评价指标及延性指标，进而对预制混凝土框架节点的抗震性能进行综合评价。通过对已获得的框架节点承载力及各项指标的对比可以发现，预制节点的连接方式与现浇节点抗震性能基本相近，且预制节点的整体性能良好。最后对框架柱和框架节点的试验结果进行了归一化后的对比。
[Abstract]:Construction of energy-saving, land-saving and environmental-friendly housing has become the goal and direction of housing construction in China. Through research and exploration, Harbin University of Technology has independently developed and developed the lapped connection of restrained grouting anchor bars, which solves the connection problem of prefabricated members in concrete structures, and combines with the actual situation in the field of housing in China. In this paper, a precast concrete connection method suitable for our country is put forward, which is called "lapping connection of restrained grouting anchor steel bar". A series of tests are carried out in view of this connection mode. And formed a prefabricated concrete shear wall structure system with independent intellectual property rights. In this paper, the method of lapping connection of restrained grouting anchor steel bar is taken as the starting point, and a variety of construction methods suitable for concrete frame member connection are put forward, and the seismic behavior tests of longitudinal reinforcement connection of frame column and Liang Zhu connection at frame joint are carried out. The pseudostatic tests of 9 full-scale frame columns were completed, including 6 prefabricated columns and 3 cast-in-situ contrast columns. The mechanical behavior, failure form, hysteretic curve, skeleton curve and stiffness degradation of each specimen under horizontal reciprocating load are analyzed. The failure mode of the two prefabricated frame columns with restrained grouting anchor insertion technique is the same as that of cast-in-place columns, and the bearing capacity is close, but the ductility is better than that of the contrast parts. On the other hand, by observing the whole deformation curve and comparing the energy dissipation indexes, the prefabricated frame columns have the same bearing capacity seismic performance and better energy dissipation performance as cast-in-place columns. Three different kinds of precast concrete frame joints were first proposed, and the quasi-static tests of three full-scale concrete frame joints and one cast-in-place joint were carried out. The crack development process of three prefabricated frame joints under reciprocating load is obtained by experiments, and the hysteretic curves of the specimens under three kinds of assembly modes are obtained by comparing with the macroscopic phenomena shown by the forces acting on the contrasts. The degradation of skeleton curve and stiffness, and the evaluation index and ductility index of joint energy dissipation ability are obtained through the analysis of test data, and the seismic performance of precast concrete frame joints is evaluated synthetically. By comparing the bearing capacity and various indexes of the obtained joints, it is found that the connection mode of the prefabricated joints is basically similar to that of the cast-in-place joints, and the overall performance of the prefabricated joints is good. Finally, the experimental results of frame column and frame joint are compared after normalization.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU375.4

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