摘要
在美国北岭地震和日本阪神地震中,很多钢结构框架的梁柱栓焊混接节点都发生了不同程度的破坏;震后国外对受损节点的修复和加固进行了深入研究,而我国在这方面的研究还相对滞后。本文简要介绍了栓焊混接梁柱刚性节点破坏的主要原因和现在国外常用的加固方法;并根据国外的试验结果,通过一个算例分析,比较了国内外规范和加固前后设计计算栓焊混接节点的不同之处。计算结果显示,对节点的适当加固能够有效地提高节点的抗震性能,有限元计算结果证实了这一点。
During the Northridge earthquake in America and the Kobe earthquake in Japan, the form of connections with welded flanges and bolted webs suffered unanticipated brittle fractures in many steel moment - resisting - frame buildings. Many researches on repair and rehabilitation have been carried out for the damaged steel moment connections after the disasters. However, the researches in our own country now lag behind. This article summarizes the causes of the damaged the main approaches abroad of reinforcing the connections with welded flanges and bolted webs. Based on the available experimental results in America, it also displays the design process by analyzing an example, and compares the differences between the notions of the design before and after the modification in China and abroad. It turns out, also confirmed by finite element analysis, that the seismic resistant performance of the connections can be improved after proper reinforcement.
出处
《四川建筑科学研究》
北大核心
2005年第6期52-56,共5页
Sichuan Building Science
关键词
钢结构
栓焊混接节点
加固
steel structure
connections with welded flanges and bolted webs
reinforcement
