盖板加强斜加劲钢板剪力墙受力性能

提出一种新型抗侧力体系——盖板加强斜加劲钢板剪力墙,运用有限元软件ANSYS15.0对斜加劲钢板剪力墙(DSW)、单侧盖板加强斜加劲钢板剪力墙(CSW-1)、双侧盖板加强斜加劲钢板剪力墙(CSW-2)结构进行单调加载、循环加载以及屈曲荷载研究,得到结构的荷载-位移曲线、滞回曲线、耗能能力、骨架曲线、屈曲系数、屈曲荷载等,对比分析了加强盖板斜加劲钢板剪力墙结构的受力性能。结果表明:单调加载条件下,加强盖板的存在提高了斜加劲钢板剪力墙的承载力和初始刚度,且双侧加强比单侧加强更优; 循环加载条件下,加强盖板使得盖板加强斜加劲钢板剪力墙的滞回曲线更加饱满,刚度退化更缓慢,表现出良好的延性,且双侧盖板加强效果比单侧加强效果明显; 斜加劲肋对内填钢板的平面外变形约束明显,盖板对加劲肋的平面外约束明显,可以在较小的用钢量下获得较大的弹性屈曲荷载增幅,是十分有效的加强方式,综合考虑加劲肋与加强盖板对结构弹性屈曲荷载的影响,建议肋板刚度比取30,盖板相似比取0.5。

Force Performance of Cover-plate Diagonal Stiffening Steel Plate Shear Wall

A new anti lateral force system — cover-plate diagonal stiffening steel plate shear wall was proposed. The finite element software ANSYS15.0 was used to simulate the monotonic loading, cyclic loading and buckling load of the diagonal stiffened steel plate wall(DSW), the single side cover-plate stiffening steel plate shear wall(CSW-1), the double cover-plate stiffening steel plate shear wall(CSW-2)structure. The load-displacement curves, hysteretic curves, skeleton curves, buckling coefficients, buckling loads were obtained, and the force performances of cover-plate stiffening steel plate shear wall structures were compared and analysed. The results indicate that under the monotonic loading, the existence of strengthened cover-plate increases the bearing capacity and initial stiffness of the diagonal stiffening steel plate wall, and CSW-2 is better than CSW-1. Under the cyclic loading, the hysteretic curves of CSW are fuller, the stiffness degradation is slower and the ductility is better, and the reinforcing effect of CSW-2 is better than that of CSW-1. The out-of-plane constraint effect of the diagonal stiffener on the inner steel plate is obvious, and the out-of-plane constraint effect of the cover-plate on the stiffener is also obvious. The elastic buckling load can be increased with a small amount of steel. Considering the influence of stiffener and cover-plate on the elastic buckling load, the suggested value of stiffness ratio of stiffener plate is 30 and the similarity ratio of cover plate is 0.5.