低周往复荷载下空心矩形墩抗震性能试验研究  

Tests for a seismic performance of rectangular hollow thin-walled bridge columns under low-cycle reversed loading

作　　者：罗征[1] 李建中[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《振动与冲击》2013年第8期183-188,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(90815007)

摘　　要：为了研究空心矩形薄壁墩柱的抗震性能,对五根钢筋混凝土空心墩柱进行了低周往复加载的拟静力试验。从构件与截面两个层面评价了墩柱试件的整体抗震性能,并分析了配筋率、剪跨比对桥墩承载能力、延性、耗能等抗震性能的影响,最后用试验数据对日本规范中残余位移的计算公式进行了修正。研究发现:钢筋混凝土空心矩形薄壁墩抗震性能良好,提高配箍率、降低剪跨比能在一定程度上提高墩柱延性变形能力。研究结果对空心矩形薄壁墩柱的抗震设计有参考意义,对其理论研究有重要的借鉴价值。In order to study the aseismic behavior of reinforced concrete hollow bridge columns, five reinforced concrete hollow bridge columns were tested under low-cycle reversed lateral loads. The aseismic performances of all the five models were evaluated from components and cross-sections level. Mean while, the influences of aspect ratio and stirrup ratio on aseismic performances of the piers, such as, load-carrying capacity, ductility and energy-dissipation were analyzed. Fanally, the residual displacement formula in Japanese specifications was modified using the test data. It was shown that the aseismic performance of the reinforced concrete hollow bridge columns is good, and with increase in stirrup ratio and decrease in aspect ratio, their ductility is improved. The results provided a reference for aseismic design of hollow bridge columns, and a guide for their theoretical studys.

关 键 词：空心墩 拟静力试验 抗震性能 残余位移 

分 类 号：U448[建筑科学—桥梁与隧道工程]