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方钢管混凝土柱—钢筋混凝土梁框架抗震性能研究
Study on seismic behavior of concrete filled square steel tube column versus reinforced concrete beam frame
投稿时间: 2016-12-12  最后修改时间: 2017-03-22
DOI:
中文关键词:  方钢管混凝土柱  钢筋混凝土梁  框架  抗震性能  试验研究  P-Δ二阶效应
英文关键词:concrete filled square steel tube column  reinforced concrete beam  frame  seismic behavior  experimental study  P-Δ second-order effect
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
作者单位E-mail
孟二从 西南大学工程技术学院 465800521@qq.com 
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中文摘要:
      为对方钢管混凝土柱—钢筋混凝土梁框架的抗震性能进行研究,本文设计制作了1榀方钢管混凝土柱—钢筋混凝土梁框架进行低周反复加载试验。主要研究表明:方钢管混凝土柱—钢筋混凝土梁框架的受力过程可划分为弹性工作阶段、弹塑性工作阶段及破坏阶段;试件的滞回曲线呈饱满的梭形,破坏时的等效黏滞阻尼系数heu为0.2241,表明该框架结构具有良好的抗震耗能性能;试件在正负向的平均位移延性系数为2.94,表现出了较好的延性性能,破坏时的平均位移转角为1/36,表现出了较强的抗倒塌能力;随着加载位移的增加,试件的残余变形及等效黏滞阻尼系数he均会逐渐增大,而强度衰减幅度总体上呈现出先增大后减小的变化趋势,刚度退化速率呈现出先快后慢的变化趋势。基于试验数据,拟合出了试件残余变形及刚度退化的相关计算公式,并对P-Δ二阶效应的影响进行了分析,提出了相关设计建议,可为相关的工程应用及理论分析提供参考。
英文摘要:
      To study the seismic behavior of concrete filled square steel tube column versus reinforced concrete beam frame, 1 frame specimen was designed and subjected to low-period cyclic load. The results show that the loading process of the frame can be divided into elastic, elastic-plastic and failure state. The hysteresis curve shows plump shuttle shape and the heu was 0.2241 which show the frame structure having good energy dissipation ability. The average displacement ductility coefficient of the frame is 2.94 which shows good ductility performance. The average inter-story displacement angle is 1/36 when the specimen destroyed which shows good anti-collapse capacity. With the increase of displacement, the residual deformation and coefficient he will both gradually increase, the strength degradation amplitude generally presents increasing at first and then turns to decreasing, and the stiffness degradation rate presents the trend of being quickly at first and then turns to slow. Based on experimental data, the calculation formula of residual deformation and stiffness degradation were fitted, and the P-Δ second-order effect to the frame was analysed and put forward some design suggestions. The research results can provide reference for some relevant engineering application and theoretical research.
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