梁柱刚性连接加强型节点的研究进展

Research Progress in Reinforced Beam-Column Rigid Connection

为了解决梁柱刚性连接节点在强震作用下的脆性破坏,采用对梁翼缘进行局部削弱或在连接区域局部加大的设计方法,以达到塑性铰外移、提高节点延性、避免在强震作用下梁柱接头发生脆性破坏的设计目的。国内外参考文献的研究结果表明,削弱型节点是以削弱梁翼缘截面、降低梁承载力为代价,获得强震作用下梁的塑性发展,而加强型节点以不降低梁承载力为前提,在大震作用下同样可以获得较好的塑性发展,使节点具有很好的延性。本文以我国《钢结构设计规范》修订为背景,针对塑性铰外移加强型节点各类形式的研究进展加以综述,并着重介绍了板式加强型节点和翼缘扩大型节点的国内外研究进展。

Methods of reduced beam section and reinforced beam section used in design can effectively improve ductility,achieve the aim of relocation of plastic hinge and avoid brittle failure of connection under earthquake.According to the references home and abroad,results show that reduced connection attains proper plastic development under earthquake at the cost of reducing beam section and lowering the beam capacity;while reinforced connection can achieve proper plastic development and ductility without lowering beam capacity.Based on the revision on codes of the steel structure design,this paper mainly introduces developments and research situation of plate-reinforced connection and enlarged beam section connection.