矩形钢管高强混凝土压弯构件的实验研究  

High strength concrete-filled RHS steel tubes subjected to eccentric loading

作　　者：郭兰慧[1] 张素梅[1] 田华[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《哈尔滨工业大学学报》2004年第3期297-301,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(59808004);黑龙江省杰出青年基金资助项目.

摘　　要：为了分析长细比、偏心率及含钢率对矩形钢管高强混凝土压弯构件力学性能的影响,进行了8根矩形截面钢管高强混凝土单向偏压构件的试验研究.结果表明:构件承载力随长细比和偏心率的增加逐渐降低;提高构件的含钢率可以减小跨中挠度;当构件含钢率低于8%时,达到极限承载力之前将发生局部失稳.试验结果同设计规程EC4、LRFD、AIJ计算结果的对比表明,规程LRFD和AIJ的计算结果偏于保守,规程EC4的计算结果和试验结果较为接近.A total of 8 high strength concrete-filled rectangular hollow section (RHS) steel tubes were tested when subjected to eccentric loading, and the primary test parameters were slenderness ratios (varied from 19.4 to 39.3), steel ratios (8.2% and 14.2%), eccentricity ratios along major axis (varied between 0.113 and 0.412), width to breadth ratios (1.3 and 1.6). The experimental results showed that the bearing capacity decreased rapidly with the increasing of the slenderness ratio and the eccentricity ratio, and the local buckling of the wall of the steel section is evident when the steel ratio is below 8%. The numerical and experimental results were in good agreement with each other.

关 键 词：高强混凝土 矩形钢管 长细比 偏心受压柱 压弯构件 

分 类 号：TU375[建筑科学—结构工程]