附加阻尼器的预应力装配框架结构节点变形研究

发布时间：2018-04-24 09:29

本文选题：预应力 + 阻尼器　；参考：《华北理工大学》2017年硕士论文

【摘要】：预应力装配框架结构就是将预制好的梁、柱构件,通过预应力筋、锚具及张拉设备连接在一起的一种新型结构形式。这种结构形式在一些框架结构住宅楼、办公楼、大跨度的工厂厂房等使用的较为广泛。预应力装配结构具有减少劳动力、提高施工速度、提高机械设备的使用、减少建筑垃圾的产生的优点。设计6个边节点试件进行低周反复荷载试验,2个不同配筋的现浇试件,4个附加阻尼器的不同配筋、不同预压力的装配试件,采用荷载-位移加载方式。根据试验结果,绘制滞回曲线、骨架曲线、延性系数表、残余变形曲线、残余位移表、刚度退化曲线,分析了6个试件在不同配筋率、不同预压力下的变形性能。结合理论知识,得到装配结构变形公式,并与试验数据进行对比分析。试验结果表明:在低周反复荷载作用下,附加阻尼器的预应力装配试件的变形恢复力优于现浇试件。提高试件的配筋率及预压力,可以提高试件的承载力、变形恢复力。附加阻尼器的试件耗能能力强,对抗震有利。论文中依据《混凝土结构设计规范》(GB50010-2010)的相关计算公式,得到装配结构变形计算公式,与试验数据进行比较,结果表明,加载后期计算结果与实际得到的变形曲线有差距,因此,建议开裂后梁刚度SB降低35%,计算得到的荷载-位移曲线与实际相接近。
[Abstract]:Prestressed assembly frame structure is a new type of structure which connects prefabricated beam and column members through prestressing tendons anchors and tensioning equipments. This kind of structure is widely used in some frame structure residential buildings, office buildings, long-span factory buildings and so on. Prestressing assembly structure has the advantages of reducing labor force, increasing construction speed, increasing the use of machinery and equipment, and reducing the production of construction waste. Six specimens with side joints were designed to carry out low-cycle repeated load test, two cast-in-place specimens with different reinforcement, four assembly specimens with different reinforcement with dampers and different pre-pressure specimens were designed, and load-displacement loading mode was adopted. According to the experimental results, the hysteretic curve, skeleton curve, ductility coefficient table, residual deformation curve, residual displacement table and stiffness degradation curve were drawn. The deformation properties of 6 specimens under different reinforcement ratio and different pre-pressure were analyzed. Combined with theoretical knowledge, the deformation formula of assembly structure is obtained and compared with experimental data. The experimental results show that the deformation recovery of prestressing assembly specimens with dampers is better than that of cast-in-place specimens under low cyclic cyclic loading. The bearing capacity and deformation recovery of the specimens can be improved by increasing the reinforcement ratio and pre-pressure. The energy dissipation capacity of the specimen with additional dampers is strong, which is beneficial to earthquake resistance. According to the calculation formula of concrete structure Design Code (GB50010-2010), the deformation calculation formula of assembly structure is obtained and compared with the experimental data. The results show that there is a gap between the calculation result of the later loading period and the actual deformation curve. It is suggested that the stiffness SB of the cracked beam should be reduced by 35%, and the calculated load-displacement curve is close to the actual one.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

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