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为考察SRC柱-RC梁节点火灾后的滞回性能,对三个试件进行了试验研究。未过火试件A直接进行梁端低周往复荷载作用下的拟静力试验;试件B和试件C在进行拟静力试验前,首先分别进行升温时间为60min和90min的过火试验。研究表明,火灾后SRC柱-RC梁节点的延性、耗能能力等各项滞回性能指标均有下降,且下降幅度随过火时间的延长而增大。对比分析了过火时间对各项滞回性能指标的影响,并对今后进一步的研究提出建议。
In order to investigate the hysteretic behavior of SRC column-RC beam after fire, three specimens were tested. The test piece A and the test piece C were subjected to the pseudo-static tests under the cyclic low-cycle reciprocating load without over-fire test piece A, respectively. Before the pseudo-static test, test pieces B and C were subjected to the over-temperature test with heating time of 60 minutes and 90 minutes respectively. The research shows that the ductility and energy dissipation capacity of SRC-RC beam joints after fire have all decreased, and the decrease extent increases with the increase of over-fire time. The influence of over-time on each hysteresis performance index is analyzed and compared, and suggestions for further research are put forward.