建筑钢结构进展2024，Vol.26Issue(1)：41-53,13.DOI:10.13969/j.cnki.cn31-1893.2024.01.005
带低屈服点钢耗能梁段高强钢框筒结构的结构影响系数和位移放大系数研究
A Research on the Structural Influence Coefficient and Displacement Amplification Coefficient of High-Strength Steel Fabricated Framed-Tube with Low-Yield-Point Steel Shear Links
摘要
Abstract
High-strength steel fabricated framed-tube structure with low-yield-point steel replaceable shear links(HSS-FTS-LSL)was proposed,in which the shear links used LYP225 low-yield-point steel in the middle of deep beam,and the columns and deep beams were made of Q460 high-strength steel.In earthquake,the shear links dissipate seismic energy through shear yield while the main component remains elastic or partially enters plasticity.To investigate the structural influence coefficient and displacement amplification factor of HSS-FTS-LSL,three groups of 8 HSS-FTS-LSL calculation examples are designed based on the Chinese standards,taking the different story,the length and the layout of links as variables.Pushover analysis was carried out for each case by stepwise lateral force adjustment method considering the effects of high-order vibration mode.Based on the improved capacity spectrum method,the structural influence coefficient R and displacement amplification factor Cd of eight cases were calculated.The influence of the above three variables on the structural performance coefficient is analyzed and the recommended values are given.Finally,according to the proposed HSS-FTS-LSL seismic design response spectrum,a structural example was redesigned.The elastic-plastic analysis of two specimens before and after the redesign was carried out,and the rationality of the proposed influence coefficient of HSS-FTS-LSL structure was verified by comparing the steel consumption and seismic performance of the two specimens.关键词
低屈服点钢/钢框筒结构/剪切型耗能梁段/分布侧向力调整法/改进的能力谱法/结构影响系数/位移放大系数Key words
low-yield-point steel/steel framed-tube structure/shear link/stepwise lateral force adjustment method/improved capability spectrum method/structural influence coefficient/displacement amplification coefficient分类
建筑与水利引用本文复制引用
周玉浩,连鸣,韩瑞祥..带低屈服点钢耗能梁段高强钢框筒结构的结构影响系数和位移放大系数研究[J].建筑钢结构进展,2024,26(1):41-53,13.基金项目
国家自然科学基金(51708444、52078411),陕西省创新能力支撑计划-青年科技新星项目(2022KJXX-47),陕西省教育厅青年创新团队科研计划项目(22JP041) （51708444、52078411）
