【摘要】 GFRP(Glass Fiber Reinforced Polymer)套管钢筋混凝土柱是一种新型的组合结构形式,为研究其抗震性能,对8根GFRP套管钢筋混凝土柱进行低周反复荷载作用下的试验研究。主要研究了轴压力大小、混凝土强度及FRP管与基础的连接方式对GFRP套管钢筋混凝土组合柱的变形能力和滞回特征的影响,根据GFRP套管钢筋混凝土组合柱在低周反复荷载作用下滞回曲线的特点,采用截面层纤维模型法对试件截面进行全过程分析获得骨架曲线。通过试验数据回归分析确定加卸载规则,提出了适合于GFRP套管钢筋混凝土组合柱的恢复力模型,并与试验结果进行了比较,计算模型与试验结果吻合良好。更多还原

【Abstract】 The RC( reinforced concrete) column confined by GFRP( Glass Fiber Reinforced Polymer) tube is a new kind of composite structure,in order to study the seismic performance of it,we conducted the low cyclic loading test on 8 RC columns confined by GFRP tube,and especially investigated the effect of axial compression ratio,concrete strength and connection mode betw een FRP pipe and foundation on the seismic performance and hysteretic characteristics of it. According to the characteristics of hysteresis curve of the RC column confined by GFRP tube under low cyclic loading,we did the whole process analysis of the cross section of the specimen and obtained its skeleton curve by using the fiber cross section layer model method. Then the unloading rule was determined through the test data regression analysis and the restoring force model of RC composite column confined by GFRP tube was proposed. Compared with the experimental results,the calculation model is in good agreement with the test results.更多还原