建筑结构学报2011，Vol.32Issue(2)：113-119,7.
受压焊接空心球节点高温试验研究
Experimental investigation on comoression performance of welded hollow spherical joints in fire
摘要
Abstract
Six welded hollow spherical joint specimens were tested under fire in fire test furnace to investigate their behavior under high temperature.The main parameters in the tests were the outside diameter and wall thickness of hollow sphere and steel pipe, yield strength of steel material and the load ratio.The distribution and influencing factors of the temperature fields, the displacement characteristics and the failure modes were obtained.The nonlinear finite element numerical simulation was performed on the compression properties of the welded hollow spherical joints under fire with the thermal parameters specified in the Eurocode.The distribution law and influencing factors of the temperature fields were analyzed.By analyzing the displacement variation characteristics of the welded hollow spherical joints under fire, their failure modes were determined.The comparison between numerical analysis and test results show good agreement.It can be concluded that decreasing the load ratio or increasing the thickness of the welded steel pipe can prolong the ultimate fire-resistant duration, and the steel tube root is the weakness of the welded hollow spherical joint under compression in fire.关键词
焊接空心球节点/高温试验/有限元分析/抗火性能分类
建筑与水利引用本文复制引用
薛素铎,邱林波..受压焊接空心球节点高温试验研究[J].建筑结构学报,2011,32(2):113-119,7.基金项目
北京市自然科学基金项目(8082004),北京工业大学博士研究生创新计划项目(bcx-2009-022). （8082004）
