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提出抗震组合钢框架的概念,在某9层及20层SAC框架中混和采用刚性节点和半刚性节点。为了使组合框架具有最大耗能能力,研究半刚性节点的不同形式和布置方式。分别施加50年超越概率为10%及2%的洛杉矶地震波,对框架结构进行非线性动力分析。计算组合框架的最大层间位移,并与FEMA356规范中的正常使用状态和极限承载力状态的位移比较。计算了组合框架的屋面位移时程、层间位移和杆件应力,并与不设半刚性节点的传统SAC框架进行对比。
The concept of seismic composite steel frame is proposed. The rigid and semi-rigid nodes are mixed in a 9-layer and 20-layer SAC framework. In order to maximize the energy consumption of the composite frame, the different forms and arrangements of semi-rigid nodes are studied. Los Angeles seismic waves with 50% overrun probability of 10% and 2% respectively were applied to the frame structure for nonlinear dynamic analysis. The maximum interlaminar displacement of the composite frame is calculated and compared with the displacement of the normal use and ultimate load states in the FEMA 356 specification. The roof displacement time history, interlayer displacement and rod stress of the composite frame are calculated and compared with the traditional SAC framework without semi-rigid nodes.