抗震钢框架节点的设计和材料断裂韧度要求的讨论

DISCUSSION ON DESIGN AND MATERIAL FRACTURE TOUGHNESS OF CONJUNCTIONS FOR EARTHQUAKE RESISTANT STEEL FRAME

地震下的钢结构梁柱节点的脆断与梁柱节点形式有很大的关系。针对国内典型的梁柱节点 ,用有限元的方法模拟计算结构在受弯载荷下应力分布情况。对几种不同形式的典型梁 -柱连接进行了分析 ,包括基本结构形式和各种加强类型。其结果经过断裂力学分析 。

The fracture of beam-to-column connections in steel construction under earthquake loading related greatly to the type of connections. Based on the model of typical beam-to-column connection in China, the stress distribution of connections was computed by three-dimensional FEM. The basis connection form and some modified ones were calculated and compared with each other. By means of fracture mechanics methods, allowable fracture toughness of material and weld were determined with certain size of defects and different stress states.