钢管再生混凝土混合柱框架恢复力模型研究  

Restoring Force Model of Recycled Concrete Filled Steel Tubular Hybrid Column Frame

作　　者：闻洋 姜雯丽霞 韩洪鹏 付立平[2] WEN Yang;JIANG Wenlixia;HAN Hongpeng;FU Liping(School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;Baotou Highway Engineering Quality Supervision Station, Baotou 014040, China)

机构地区：[1]内蒙古科技大学土木工程学院,内蒙古包头014010 [2]包头市公路工程质量监督站,内蒙古包头014040

出　　处：《建筑钢结构进展》2019年第3期40-49,共10页Progress in Steel Building Structures

基　　金：国家自然科学基金(51768056);内蒙古自然科学基金(2013MS0715);内蒙古自治区研究生教育创新计划资助项目(S20151012702)

摘　　要：为了探究钢管再生混凝土混合柱框架的抗震性能,设计4榀圆钢管再生混凝土混合柱框架并对其进行低周往复荷载试验,以混凝土取代率、柱截面含钢率为参数变量得到混合柱框架的梁端、柱脚及核心区的应变分布规律、滞回曲线和骨架曲线。结果表明,4榀混合柱框架的滞回曲线均饱满呈梭形,说明框架延性性能较好;骨架曲线在进入弹塑性阶段后更平缓,说明框架的耗能能力和抗震性能均较好;梁端塑性铰位置出现在30~90mm范围内,柱脚塑性铰位置出现在40~100mm范围内,说明梁端及柱脚的高应力区存在于这两个位置,设计时应考虑在此薄弱区进行加强。根据钢管再生混凝土混合柱框架在低周往复荷载作用下的滞回规则,得到荷载-位移滞回曲线恢复力模型。将模型计算与试验结果得出的关系曲线进行对比,得出两种滞回曲线差距控制在4%~7%范围内,验证了分析模型的准确性。In order to study the seismic performance of recycled concrete filled steel tubular hybrid column frame,low cyclic loading tests are conducted on four recycled concrete filled steel circular tubular hybrid column frames.Taking replacement ratio of concrete and steel ratio in column section as varying parameters,the strain distribution,hysteretic curves and skeleton curves at beam end,column base and core area are obtained.The results show that the hysteretic curves of four frames are full and spindle-shaped,and the frame ductility performance is relatively good.After the elastic-plastic phase,skeleton curves become more smooth,indicating the energy dissipation and seismic performance is good.The plastic hinge positions are in the 30~90 mm range to the beam ends,and in the 40~100 mm range to the column end.The high stress region of beam ends and column ends are present in the two positions,and these areas should be strengthened specifically.According to the hysteretic rules of recycled concrete filled steel tubular hybrid column frame under low cyclic loading tests,the load-displacement hysteretic curves of restoring force model are obtained.The hysteretic and skeleton curves in experimental and analytical studies are compared.The two hysteretic curves and skeleton curves have a reasonable difference of 4%~7%.This verifies the correctness of analytical model.

关 键 词：再生混凝土 框架 低周往复荷载 滞回曲线 恢复力模型 

分 类 号：TU398[建筑科学—结构工程]