新型外套筒式梁柱装配节点的抗震性能研究

Study on Seismic Performance of New Beam-Column Assembly Joint with Outer Sleeve

为改善建筑钢结构梁与柱施工现场装配连接的性能,构造设计了一种新型外套筒式梁柱装配节点.采用ANSYS建立了节点三维实体模型,基于非线性有限元分析方法模拟了新型外套筒式梁柱装配节点的抗震性能,分析了节点的破坏模式、滞回曲线、骨架曲线、延性及能量耗散系数等.基于小变形叠加原理,提出了外套筒式梁柱装配节点初始刚度简化计算方法,对比分析了有限元模拟与理论计算结果,验证了节点初始刚度简化计算方法的合理性.研究结果表明,新型外套筒式梁柱装配节点的滞回曲线稳定饱满,刚度退化平稳,抗震性能、延性及耗能能力良好.该新型外套筒式梁柱装配节点可为建筑工业化应用提供一种借鉴参考.

In order to improve the performance of assembly connection between building steel beam and column in construction site,a new beam-column assembly joint with outer sleeve was designed.The joint three-dimensional solid model was established by ANSYS.Based on nonlinear finite element analysis method,seismic performance of the new beam-column assembly joints with outer sleeve was simulated,and the failure mode,hysteresis curve,skeleton curve,ductility and energy dissipation coefficient of the joints were analyzed.Based on the superposition principle of small deformation,a simplified initial stiffness calculation method was proposed for beam-column assembly joints with outer sleeve.Finite element simulation and theoretical calculation results were compared,and the rationality of simplified joint initial stiffness calculation method was verified.The results show:The hysteresis curve of the beam-column assembly joint with outer sleeve is stable and full,and the stiffness degeneration is smooth.It has better seismic performance,ductility and energy dissipation capacity.The new beam-column assembly joint with outer sleeve provide a good project for the application of building industrialization.