新型钢框架梁柱节点研究进展综述

针对钢框架梁柱节点的焊缝在地震中易脆性断裂的问题,可采用使节点塑性铰外移的方法来解决此问题。国内外研究表明,削弱式节点、加强型节点和高耗能节点均能使塑性铰外移,提高节点的耗能能力,避免焊接端的脆性破坏。但以上节点的梁段在震后产生的塑性铰不利于节点的修复,因而对梁柱节点的研究逐渐趋向于震后可恢复性及可修复功能,并提出具有可恢复功能的节点。文中对各类新型节点的研究现状进行综述,着重介绍了高耗能节点及可恢复功能节点,并提出了节点研究进程中尚需解决的问题,以期为日后节点的研究提供参考。

RESEARCH PROGRESS OF NEW TYPE BEAM-COLUMN CONNECTIONS OF STEEL FRAME

For the problem that the welds of beam-column connections of steel frames are vulnerable to brittle damage in earthquake, the method of moving the plastic hinge away from the beam-column connection can be used to solve the problem. Studies at home and abroad show that the weakened connections, the reinforced connections and the high energy dissipation connections can move the plastic hinges away from the connection, improving the energy dissipation capacity of the connections and avoiding brittle damage of welded connections. However, the above-mentioned plastic hinges are not conducive to the repair of the connections after earthquake. Therefore, the studiesof beam-column connections tend to be restorable and repairable, and the restorable connections are proposed. The research status of new type connections is summarized in this paper, with emphasis on the connections with greater energy dissipation capacity and the connections with a function of post-seismic recoverability. In order to provide reference for the future connection research, the problems that need to be solved in the process of the connection research are put forward.