火灾下高强钢栓焊连接节点力学性能试验研究

Experimental Study on Mechanical Behavior of High Strength Steel Flange-welded Web-bolted Connections Under Fire Condition

摘要:

通过栓焊连接节点足尺试验，对比分析Q690和Q960 2种强度的高强钢栓焊连接节点在常温和火灾高温下的力学性能。将试验获得的节点承载力与美国、欧洲和中国的现有规范进行对比，验证现有规范对高强钢栓焊连接节点的适用性，并提出高强钢栓焊连接节点的设计建议。最后，对比分析高强钢端板连接节点和栓焊连接节点抗火性能的异同，结果表明高强钢栓焊连接节点抗火性能相对优于高强钢端板连接节点。

Abstract:

In this paper， through the full-scale experiment of high strength steel flange-welded web-bolted connections， the mechanical properties of Q690 and Q960 connections at ambient temperature and elevated temperatures are studied. The theoretical values of bearing capacity recommended by the existing American， European and Chinese codes are compared with the experimental values to verify the effectiveness of the codes for the high strength steel flange-welded web-bolted connections. The recommendations for the design of the high strength steel flange-welded web-bolted connections are given. Finally， the difference of fire resistance between the high strength steel endplate connections and the high strength steel flange-welded web-bolted connections is analyzed. It is shown that the high strength steel flange-welded web-bolted connections are better than the high strength steel endplate connections in terms of fire resistance.