矩管混凝土柱H型钢梁新型连接节点抗震性能研究

RESEARCH ON THE SEISMIC BEHAVIOR OF A NEW TYPE OF JOINT ON RECTANGULAR TUBULAR AND CONCRETE-FILLED H-STEEL BEAM

通过对所提出的方钢管混凝土柱H型钢梁楔形箱型节点进行抗震性能研究,利用ABAQUS分析了矩管柱的宽厚比、混凝土强度以及轴压比对节点滞回性能的影响。结果表明:影响节点受力性能的主要因素是矩管的宽厚比,在一定范围内提高矩管厚度会提高节点的承载能力和刚度。同时给出了矩管混凝土柱H型钢梁楔形箱型节点抗剪承载力简化计算式。

The seismic behavior of the new type of joint on H-steel beam and concrete-filled rectangular tubuler was studied.The effects of the width-thickness ratio,concrete strength and axial compression ratio on the hysteretic behavior of the joint were analyzed by ABAQUS.The results showed that the main factors affecting the mechanical properties of joints were width-thickness-ratio of the tublar.The bearing capacity and stiffness of the joint could be improved by increasing the thickness of steel tube in a certain range.A simplified formula to calculate the shear bearing capacity of the joint was proposed.