湖南大学学报（自然科学版）2019，Vol.46Issue(1)：9-21,13.DOI:10.16339/j.cnki.hdxbzkb.2019.01.002
高强钢平齐式端板连接节点火灾后力学性能试验研究
Experimental Study on Mechanical Behaviour of High Strength Steel Flush Endplate Connections after Fire
摘要
Abstract
After fire, residual forces and deformations are re-developed inevitably in steel structures, and it may cause more dangerous consequence than that in fire condition. Beam-column connections are very important parts for the whole structure. In order to reveal more information about high strength steel flush endplate connection, an experimental study on mechanical behaviour of high strength steel flush endplate connections was carried out.Seven flush endplate connections were tested after cooling down from 550°C. The final deformation, moment-rotation curves and failure mode of high strength steel flush endplate connections were obtained and compared with those of mild steel flush endplate connections. Moreover, the provisions of Eurocode 3 were validated with the test results. It is found that a thinner high strength steel endplate can achieve similar residual load-bearing capacity and comparable or even higher rotation capacity after fire, in comparison with a connection with thicker mild steel endplate.Meanwhile, the provisions of Eurocode 3 for plastic flexural resistance of endplate connections are applicable when used to predict the behavior of high strength steel flush endplate connection after fire.关键词
高强钢/平齐式端板连接节点/火灾后/试验研究/力学性能/失效模式Key words
high strength steel/flush endplate connection/after fire/experimental study/mechanical behavior/failure mode分类
建筑与水利引用本文复制引用
强旭红,石志伟,赵国栋,姜旭,宋杰,任楚超..高强钢平齐式端板连接节点火灾后力学性能试验研究[J].湖南大学学报（自然科学版）,2019,46(1):9-21,13.基金项目
国家重点研发计划重点专项(2017YFB0304701) （2017YFB0304701）
国家自然科学基金资助项目(51408150) （51408150）
国家财政部项目((2013)235) （(2013）
中央高校基本科研业务费专项资金资助项目(2014KJ044) （2014KJ044）
