(中国建筑第八工程局有限公司， 上海 200135)

［摘要］为精准预测高强钢端板连接节点在常温、高温及过火冷却后的力学性能，基于组件法推导了高强钢端板连接节点初始刚度计算方法。为验证该方法的准确性，对比了采用该计算方法和现有计算方法计算得到的高强钢端板连接节点常温、高温及过火冷却后初始刚度的计算值和试验值。研究结果表明，大部分节点初始刚度的试验结果高于计算结果，但相较于欧洲规范EN 1993-1-8推荐方法的计算结果，本文提出的初始刚度计算方法可更准确地反映高强钢端板连接节点在常温、高温及过火冷却后的力学性能。 

［关键词］高强钢；端板连接节点；高温；过火冷却；初始刚度

中图分类号：TU391 文献标识码：A文章编号：1002-848X(2021)23-0090-05

Research on calculation method of initial stiffness of high-strength steel end-plate connection joints in fire and after fire 

WU  Nianduo,  WAN  Zhanjun,  XU  Nuo,  HE  Chao,  WANG  Cong 

(China Construction Eighth Engineering Division  Co., Ltd., Shanghai 200135， China) 

Abstract: In order to accurately predict the mechanical properties of high-strength steel (HSS) end-plate connection joints at room temperature, at high temperature and after fire cooling, the calculation method for the initial stiffness of HSS end-plate connection joints was derived based on the component method. In order to verify the accuracy of this method, the calculated values of initial stiffness of HSS end-plate connection joints obtained by this calculation method and the existing calculation methods at room temperature, at high temperature and after fire cooling were compared with the experimental values. The research results show that the experimental results of the initial stiffness of most joints are higher than the calculated results, but compared with the results recommended by the European Code EN 1993-1-8, the proposed initial stiffness calculation method can more accurately predict the mechanical preformance of HSS end-plate connection joints at room temperature, at high temperature and after fire cooling. 

Keywords:high-strength steel； end-plate connection joint； high temperature； fire cooling； initial stiffness

*国家重点研发计划重点专项资助项目（2017YFB0304701），国家自然科学基金（51408150），中央高校基本科研业务费专项资金（2014KJ044），财政部2013年施工新技术研究与开发项目（财企（2013）235号）。

 作者简介：武念铎，博士，工程师，Email：331213494@qq.com。