钢-混凝土组合楼板对钢框架结构抗震性能的影响
Influence of Steel-Concrete Composite Slab on Seismic Behavior of Steel Frame Structure

为了研究钢-混凝土组合楼板对钢框架结构抗震性能的影响, 建立考虑楼板空间作用的梁-分层壳混合有限元模型和空框架模型．通过对两模型分别进行静力推覆分析和动力增量分析, 揭示组合楼板对钢框架结构地震作用下弹塑性工作性能的影响规律．结果表明, 组合楼板对梁产生增强作用, 在地震作用下使结构抗侧刚度和抗侧承载力增大、结构周期和位移反应减小, 但是考虑楼板组合作用的框架延性、滞回性能和耗能能力会降低, 甚至可能改变结构预期的“强柱弱梁”的破坏模式, 使结构偏于不安全．
In order to study the influence of steel-concrete composite slab on the seismic behavior of steel frame structure，the beam-stratified shell mixed models of profiled steel sheeting-concrete composite slabs are set up with the spatial composite effect on slabs taken into consideration. Pushover analysis and dynamic incremental analysis are made，respectively，of a steel frame structure with and without slabs，and the influence of composite slabs on the seismic behavior of steel frame structure in elasto-plastic working state under earthquake is presented. It can be found that the slab spatial composite effect will enhance the strength of beams so as to increase structural lateral stiffness and bearing capacity and decrease structural period and displacement response. But the slab spatial composite effect may reduce structural ductility，hysteresis quality and energy dissipation，and even change the structural expected failure mode of“strong column and weak beam”，which is likely to make the structure unsafe