火灾后型钢混凝土柱抗震性能试验及参数分析

发布时间：2018-09-16 21:44

【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。
[Abstract]:The temperature field and seismic behavior of steel reinforced concrete columns after fire were tested. The shape and stiffness of hysteretic curves of steel reinforced concrete columns after fire were studied by considering the influence of fire time, axial compression ratio, stud, steel content and other parameters on the shape and stiffness of hysteretic curves of steel reinforced concrete columns after fire. The ductility and damping coefficient were systematically studied and the parameters were analyzed. The results show that bending failure occurs in column specimen after fire, hysteresis loop is fusiform in general, energy dissipation ability is better, hysteresis loop has slight pinch effect, and the equivalent stiffness decreases with increasing fire time, and increases with axial compression ratio. With the increase of equivalent stiffness, the influence of stud and steel content on the equivalent stiffness is small; with the increase of horizontal displacement, the equivalent viscous damping coefficient of the specimen increases; the fire time and the pin have little effect on the equivalent viscous damping coefficient of the specimen; The higher the equivalent viscous damping coefficient is.
【作者单位】：中国建筑科学研究院;深圳市东大国际工程设计有限公司;
【基金】：国家自然科学基金(51278477) 中国建筑科学研究院自筹基金(20120106330730073) 国家科技支撑计划(2012BAJ07B01)
【分类号】：TU398.9;TU352.11

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