中文摘要：

进行型钢混凝土柱试件温度场和火灾后抗震性能试验,考虑受火时间、轴压比、栓钉、含钢率等参数的影响,对火灾后型钢混凝土柱试件的滞回曲线的形状、刚度、延性和阻尼系数等特性进行系统的试验研究和参数分析。研究表明：火灾后柱试件出现受弯破坏;滞回环总体上呈梭形,耗能能力较好,滞回环有轻微的捏拢效应;随受火时间增加,试件等效刚度降低,随轴压比增加,等效刚度增加,栓钉和含钢率对等效刚度影响较小;随水平位移增加,试件等效黏滞阻尼系数增加;受火时间和栓钉对试件的等效黏滞阻尼系数影响较小;含钢率越大,等效黏滞阻尼系数越大。

英文摘要：

Tests were carried out to study post-fire seismic performance of steel reinforced concrete（ SRC） columns. The post-fire seismic properties of the SRC columns, including hysteresis curve shape, stiffness, ductility and damp coefficient,are investigated through tests and parametric analyses. The parameters considered include heating time,axial compression ratio and steel ratio. It can be found from the study that a bending failure appears when the SRC column specimen is loaded to collapse after fire. In general,the shape of the hysteresis curve is spindle-shaped although a slight pinching effect can be observed,indicating that the SRC column specimens have good energy dissipation capacity after fire. The stiffness of the specimens decreases with the increase of the heating time and the axial compression ratio. The stud and steel ratio have little influence on the stiffness. The damp coefficient increases with the increase of horizontal displacement,while the heating time and the stud have little influence on the damp coefficient,and the damp coefficient increases with the increase of the steel ratio.