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为研究防屈曲耗能支撑在组合框架结构中的减震效果,设计了1榀10层3跨防屈曲耗能支撑钢管混凝土柱-钢梁组合框架,利用网络化结构实验室NetSLab进行了1/3缩尺的子结构拟动力试验,分析楼层剪力、支撑剪力与层间位移之间的响应关系。结果表明:在多遇烈度地震作用下,主体框架与支撑均处于弹性工作状态;在基本烈度地震作用下,主体框架处于弹性工作状态,支撑开始屈服耗能;在罕遇烈度地震作用下,主体框架基本处于弹性工作状态,而支撑则出现明显的滞回耗能效果。由楼层位移时程曲线可知,结构底层层间位移比其他各层大很多,满足组合框架结构多道抗震设防的要求。
In order to study the damping effect of anti-buckling energy dissipation in composite frame structure, 1 榀 10 layers of 3-span anti-buckling energy-dissipating concrete-filled steel tubular column-steel beam composite frame were designed. Net / 3-scale sub-structure pseudo-dynamic test to analyze the relationship between the floor shear force, the support shear force and the displacement between layers. The results show that under the action of multi-intensity earthquake, the main frame and the support are in elastic working condition. Under the earthquake of basic intensity, the main frame is in elastic working condition and the support begins to yield energy dissipation. Under the action of rare earthquake, the main body The framework is basically in a flexible working condition, while the support shows obvious hysteresis energy dissipation effect. According to the time-course curve of displacement, it can be seen that the displacements between floors in the structure are much larger than those in other layers, and meet the requirements of multiple seismic fortification of composite frame structure.