To study seismic performance of innovative crimping PEC column—steel beam composite frame structure system,a two-story and one bay test specimen of crimping PEC column (weak axis)—reduced-section steel beam composite frame with end plates and pretension high-strength penetrating bolts connection is taken as the research subject,finite element software ABAQUS is adopted to simulate its hysteretic behavior under quasi-static cyclic lateral loading.The results indicate that:the specimen structures have high strength and initial lateral-resisting stiffness,the difference of initial lateral resisting stiffness between two stories is great,but the difference is reduced due to the development of damage process of the specimen with loading increasing;the energy-dissipation capacity is along the height of the specimen resulted from steel yielding and concrete crushing at bottom of PEC column and yielding of steel beam;all connections exhibit soundly partial self-centering function,energy-dissipation and rotation capacity resulted from end-plate with pre-tension penetrating bolts and reduced-section steel beam;the failure mode is primarily induced by plastic hinge in the steel beam and the root of the bottom of PEC column,the inter-story drift and connection rotation all surpass the inter-story drift limit(1/30),hence the specimen structures have better seismic performance.%以采用端板预拉对穿螺栓的两层单跨新型卷边钢板组合截面PEC(弱轴)-钢梁(梁端削弱截面)组合框架结构试验试件为研究对象,利用有限元软件ABAQUS对其进行低周往复荷载下滞回性能有限元分析.研究结果表明:试件结构具有较高承载力和较大的抗侧刚度,两层初始抗侧刚度差距较大,随着加载引起结构损伤进程的发展,刚度差异不断减小;试件主要通过梁端屈服和PEC柱脚混凝土压溃与钢构架屈服耗能,上下层耗能分布均匀;采用端板预拉对穿螺栓连接和梁端削弱截面,不仅使连接具有部分自复位功效,且较好改善了连接的转动能力和抗震耗能需求;试件最终破坏模式为梁端和PEC柱脚处形成塑性铰的塑性破坏机构,层间侧移和连接转角均超过大震层间侧移限值(1/30),表明试件结构体系具有良好的抗震性能.
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