锈蚀箍筋约束混凝土柱低周往复试验研究

发布时间：2018-06-08 07:30

本文选题：锈蚀箍筋 + 约束混凝土柱　；参考：《西安建筑科技大学学报(自然科学版)》2017年05期

【摘要】：为了解锈蚀箍筋约束混凝土柱的抗震性能,通过加速锈蚀试验得到8根锈蚀混凝土柱,并对其进行低周反复荷载试验,研究箍筋锈蚀后混凝土柱的受力特点和破坏机制,对比分析箍筋直径、箍筋间距等参数变化对锈蚀箍筋约束混凝土柱的承载能力、延性、滞回特性、刚度退化、强度退化和耗能等抗震性能指标的影响.结果表明:箍筋锈蚀后,混凝土受到的约束作用降低,导致混凝土柱抗震性能退化;随着箍筋锈蚀量增大,柱破坏时的极限位移减小,滞回曲线出现捏拢现象且逐渐明显,强度降低程度和刚度衰减程度均增大,延性和耗能能力降低,相同控制位移下的累计耗能量增大.
[Abstract]:In order to understand the seismic behavior of corroded stirrups confined concrete columns, eight corroded concrete columns were obtained by accelerated corrosion test, and the low cycle repeated load tests were carried out to study the mechanical characteristics and failure mechanism of the corroded concrete columns. The effects of the diameter of stirrups and the spacing of stirrups on the bearing capacity ductility hysteresis characteristics stiffness degradation strength degradation and energy dissipation of corroded stirrups confined concrete columns are analyzed. The results show that the restrained action of concrete decreases after stirrups corrosion, which results in the degradation of seismic behavior of concrete columns, and with the increase of stirrups corrosion, the ultimate displacement of columns decreases, and the hysteretic curves become more and more obvious. The intensity decrease and stiffness attenuation increase, the ductility and energy dissipation ability decrease, and the accumulative energy consumption increases under the same control displacement.
【作者单位】：西安科技大学建筑与土木工程学院;西安建筑科技大学土木工程学院;
【基金】：国家青年科学基金项目资助(51408483) 陕西省自然科学基础研究计划面上项目(2017JM5045)
【分类号】：TU375.3

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