【摘要】 采用非线性有限元软件Msc.Marc对高层钢管混凝土组合框架-钢板剪力墙结构底部四层两跨未加劲薄钢板墙模型进行了推覆分析与滞回分析。计算结果表明,组合钢板剪力墙结构具有良好的延性及稳定的滞回性能,结构进入弹塑性阶段后钢板墙的拉力带方向与CAN/CSA S16-01(2001)推荐公式吻合良好。根据分析结果,比较了不同分析类型及不同钢板墙厚度的影响。研究发现,考虑钢材强化及包辛格效应后,结构滞回分析的极限承载力将小于推覆分析的极限承载力;随着钢板墙厚度的增大,结构的弹塑性屈曲模态由局部屈曲向整体屈曲过渡;在罕遇地震作用下,钢板墙结构的底层边缘约束柱将产生较大的轴拉力,甚至被拉断而导致结构整体破坏。更多还原

【Abstract】 Nonlinear finite element analysis was conducted for a four-story two-bay thin unstiffened composite CFT frame-steel plate shear wall system under monotonic and cyclic loading.The model is the bottom part of a highrise hybrid structure.The results show that the steel plate shear wall system exhibits very stable and ductile behavior.The resulting tension field angle of the steel plate fits well with the recommended formula of CAN/CSA S16-01(2001).It is concluded that the ultimate strength of cyclic analysis is lower than that of monotonic analysis considering material hardening and Bauschinger effect.The elasto-plastic buckling mode will vary from local buckling to global buckling with the increase of plate thickness.The bottom column of the steel plate shear wall structure will suffer great tension under rare earthquakes.Moreover,the entire structure may fail due to the column tensive fracture.更多还原