截面长宽比对矩形钢管高强混凝土力学性能的影响  

Influence of height-to-breadth ratio on the behaviors of high strength concrete-filled RHS tubes

作　　者：郭兰慧[1] 张素梅[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,哈尔滨150090

出　　处：《哈尔滨工业大学学报》2007年第4期530-535,共6页Journal of Harbin Institute of Technology

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

摘　　要：采用数值分析方法分析了矩形钢管高强混凝土轴压短柱、偏压短柱、轴压长柱、偏压长柱及受弯构件的力学性能,理论分析结果和试验结果进行了对比,两者吻合较好。在此基础上利用数值分析程序,通过大量算例的计算,分析了截面长宽比对矩形钢管混凝土轴压、偏压构件及受弯构件力学性能的影响.研究结果表明：截面长宽比在1.0~1.6内变化时对矩形钢管混凝土轴压构件承载力的影响很小,对构件纵向应力-应变关系曲线的下降段有较显著影响;当长细比相同时,截面长宽比对压弯构件相关曲线的影响也较小;矩形钢管混凝土绕强轴的抗弯承载力和刚度随着截面长宽比的增加而增大,绕弱轴的变化规律正好相反.A nonlinear numerical program is produced, which can analyze the behavior of high strength concrete -filled rectangular hollow section tubes subjected to different loading conditions. The numerical results are compared with the experimental results, and they agree well. Based on the above, the influence of height - to - breadth ratio on the axial loading stub column, axial loading slender column, eccentric loading member and pure bending member is discussed. The results show that the height - to - breadth ratio （ vary from 1.0 to 1.6） has no evident influence on the bearing capacity of axial loading member, but the ductility will decrease with the increasing of height - to - breadth ratio. When the specimens＇ slenderness ratio are equal, the height -to- breadth ratio has little influence on the （ N/Nu ） - （ M/M ） interaction curves. The bending moment capacity and the elastic rigidity along major axis will improve with the increasing of height - to - breadth ratio.

关 键 词：截面长宽比 高强混凝土 矩形钢管 填充混凝土 

分 类 号：TU375[建筑科学—结构工程]