【摘要】 对支撑跨梁柱铰接的墙板内置人字形无黏结钢板支撑钢框架结构模型的抗震性能进行了分析。考察了罕遇地震作用下,非支撑跨梁柱连接形式对结构震后残余变形的影响。分析表明,多遇或罕遇地震作用下,非支撑跨梁柱刚接或铰接的10层结构模型与非支撑跨梁柱刚接的30层结构模型层间侧移均满足规范限值要求。罕遇地震作用下,当10层结构模型中非支撑跨采用梁柱铰接的钢框架时,因结构抗侧刚度较小,故层间剪力较小,但楼层侧移和残余变形均较大,最大层间残余侧移角超过0.005。当非支撑跨采用梁柱刚接的钢框架,以及对钢框架按双重抗侧力体系中的受弯框架进行调整加强后,可以大幅减小结构震后的残余变形,最大层间残余侧移角均不超过0.005,但结构用钢量较大。建议对于多层的支撑钢框架结构,在非支撑跨宜采用刚接框架,但并非一定要按双重抗侧力体系调整加强。更多还原

【Abstract】 An analysis on seismic response for chevron panel buckling-restrained braced frames( BRBFs),with hinged steel frames in the braced span,has been carried out. The effects of connection types for frame members outside the braced span on residual deformations of braced frames under rare earthquake actions were mainly examined. The analysis reveals that the maximum inter-story drift of all examined structures,including both 10-story and 30-story structures,are all smaller than the limits of design code under frequent or rare earthquake excitations.The maximum residual inter-story drift ratio of 10-story structures with hinged steel frames outside the braced span under rare earthquake actions exceed 0. 005 and these structures develope small inter-story shear forces,large lateral displacements and residual deformations due to their smaller lateral stiffness. When rigid frames are used outside the braced span and especially the rigid frames are designed according to the requirements of dual system,residual deformations of the braced frames can be reduced greatly and the maximum residual inter-story drift ratio is smaller than 0. 005. Therefore,it is beneficial to employ rigid frames outside the braced span for multi-story braced steel frames,although it is unnecessary to design the rigid frames according to the requirements of dual system.更多还原