Experimental Investigation of the Performance of Exterior Joints for Steel Frames under Fire Circumstance
钢框架边节点抗火性能的试验研究

In this paper,the performance of eight exterior joints for steel frames under fire circumstance was investigated.The tests were implemented with the self-developed fire-test furnace which is reliable and convenient.All exterior joints were in full scale.3000mm-long steel column and 1350mm-long steel beams were used in the experiments.Steel columns were supported with two pinned ends.The connection method of beam and column include bolt-weld connection,full-weld connection and end-plate connection respectively in the experiments.The main factors including connection method,stiffening rib and end-plate thickness which may have influence on the performance of exterior joints under fire circumstance were examined.From the test results,the failure models of exterior joints and the regularities of rotation-temperature are obtained.The test results show that the failure models of exterior joints under fire circumstance are influenced by different connection methods and stiffening rib.Stiffening rib of web can enhance limit temperature of end-plate connections.