方钢管混凝土柱与钢梁半刚性连接节点的恢复力本构模型

Restoring force constitutive models of concrete-filled square steel tubular column-to-steel beam semi-rigid connections

本文在试验研究和有限元模型修正的基础上,对两类方钢管混凝土柱与钢梁半刚性连接节点———缀板连接节点和穿芯螺栓-端板连接节点进行反复荷载作用下的非线性有限元参数分析,结果表明:影响缀板连接节点转动性能的主要因素是缀板的厚度,影响穿芯螺栓-端板连接节点转动性能的主要因素是端板厚度和螺栓直径等。进而通过回归分析建立了上述两类节点弯矩-转角恢复力模型的简化计算公式,可供工程设计与数值简化计算参考。

Based on the cyclic testing and finite element model updating, the parametric analysis of two kinds of concrete-filled square steel tubular column-to-steel beam semi-rigid connections, namely sided-plate welding （SPW） connection and stiffened end plate （SEP） connection, under the cyclic loading by using the ANSYS program was conducted. From the analysis, it can be seen that the main influenctial factor of the SPW connection is the thickness of sided-plate, and those of SEP connection are the diameters of bolts and the thickness of end-plate. Furthermore, restoring-force constitutive models for the monotonic moment-rotation relationships of two kinds of connections were established through statistic regressing analysis. These models can be used to the initial design of the practical engineering and the numerical analysis.