【摘要】 提出了一种震后功能可快速恢复的新型结构体系—含可更换剪切型耗能梁段-高强钢组合框筒结构(简称HSS-SFTS)。为研究和比较HSS-SFTS与传统钢框筒结构(简称FTS)的抗震性能,给出了HSS-SFTS的初步设计方法,采用SAP2000各建立一个40层的HSS-SFTS和FTS算例结构,对有限元模型进行静力弹塑性分析。结果表明:HSS-SFTS在罕遇地震性能点处的层间侧移角小于FTS的相应值,结构延性得到有效提升。结构层间侧移角达到抗震规范弹塑性转角限值1/50时,HSS-SFTS中耗能梁段塑性铰处于LS状态,可以满足抗震规范中"大震不倒"的设计理念。承载力极限状态时,HSS-SFTS的层间侧移角沿结构高度方向分布均匀,没有出现明显的薄弱层,且其塑性变形与损伤主要集中于耗能梁段处,具有理想的整体破坏模式。新型结构体系有效改善了传统框筒结构的抗震性能,降低了水平地震作用,使得除耗能梁段外的非耗能构件受损程度减轻,此种新型高层钢结构更易于震后修复与功能的快速恢复。更多还原

【Abstract】 A high strength steel fabricated framed-tube structure with replaceable shear links(HSS-SFTS) was proposed in this paper. A preliminary design method of HSS-SFTS was presented. The finite element models(FEMs) of one 40-story framed tube structure(FTS) and one 40-story HSS-SFTS were established in SAP2000.Static elastoplastic analyses were performed to assess their seismic performance. The analysis results indicate that the inter-story drift of the HSS-SFTS at rare earthquake performance point was less than the corresponding value of the FTS. The inter-story drift angles of the HSS-SFTS could satisfy the requirements of the inter-story deformation limit during frequent earthquakes and the requirement for collapse prevention in the seismic design code. The plastic hinges of the HSS-SFTS at the shear links occurred in the life safety state. When the ultimate strength and the inter-story drift angle distribution of the HSS-SFTS along height was relatively uniform, its plastic deformation and damage were mainly concentrated in the shear link, and it exhibits an ideal overall failure mode. The HSS-SFTS could reduce the effects of earthquakes and the damage to non-dissipative components. The HSS-SFTS could be more prone to functional recovery after earthquakes.更多还原