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装配式斜支撑节点钢框架是一种新型结构体系,该框架的桁架梁和斜支撑不同于传统框架。为研究斜支撑对于多层平面钢框架抗连续倒塌性能的影响,采用Pushdown方法和瞬时加载法,分别对无支撑框架和装配式斜支撑节点钢框架在边柱和中柱失效的情况下进行竖向推覆分析和动力非线性分析。分析结果表明:斜支撑改变了框架的传力路径,使桁架梁中部的耗能梁段成为主要受力构件,在达到极限荷载时,桁架梁中部的斜腹杆最先破坏,起到保护梁柱节点的作用;斜支撑可以较大幅度地提高结构的极限承载力和刚度;无论是底层边柱失效还是中柱失效,斜支撑均可以明显减小失效处节点位移,同时起到缓解振荡的作用。
Assembled inclined support node steel frame is a new type of structural system, the frame truss beams and inclined support is different from the traditional frame. In order to study the influence of slanting brace on the anti-continuous collapse performance of multi-story planar steel frame, Pushdown method and transient loading method were used to carry out vertical and horizontal loading of unsupported frame and fabricated skew-supported node steel frame Pushover analysis and dynamic nonlinear analysis. The analysis results show that the diagonal brace changes the force transmission path of the frame and makes the energy dissipation beam segment in the middle of the truss girder become the main force component. When the ultimate load is reached, the diagonal web rod in the middle of the truss girder is destroyed first, The effect of inclined support can greatly improve the ultimate bearing capacity and stiffness of the structure. Both the bottom side column failure and the center column failure, the inclined support can obviously reduce the node displacement at the failure point, effect.