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近海石油和天然气生产建筑容易发生爆炸和火灾。为了研究爆炸和火灾下结构的性能,对没有涂防火层的钢管T型节点进行试验。先对试件进行冲击,然后再在恒定荷载作用下进行加热。研究温度升高时T型节点的破坏模型、临界温度和温度分布;通过对比不受冲击荷载的试验,探索冲击荷载对节点力学性能的影响。结果表明:由于弦壁局部屈曲而导致的破坏模型与在室温下的破坏情况相同,但受冲击试件的临界温度为690℃,比不受冲击高。试验结果可对以后的数值研究进行验证。
Offshore oil and gas production buildings are prone to explosions and fires. In order to study the performance of structures under explosion and fire, T-joints were tested on steel tubes without a fire barrier. First impact on the specimen, and then heated under constant load. The failure model, critical temperature and temperature distribution of T-joints at elevated temperatures were studied. The impact of impact loads on the mechanical properties of joints was investigated by comparing the tests without impact loads. The results show that the damage model due to the local buckling of the chord wall is the same as that at room temperature. However, the critical temperature of the specimen under impact is 690 ℃, which is higher than that of the impact test. The results of the experiment validate future numerical studies.