建筑结构学报2013，Vol.34Issue(7)：40-46,7.
钢筋混凝土框架结构抗层屈服倒塌能力评价方法研究
Study on seismic collapse resistance evaluation method of weak layer in RC frame structures
摘要
Abstract
Seismic action will be greatly attenuated after the yielding of weak layer of RC frame structures.And the structure will collapse when seismic action is sustainable or larger aftershocks occur.Through the analysis of strength and stiffness degradations of the frame weak layer,internal and external conditions of fall layer collapse were discussed.Deformation criteria and stability criteria of frame collapse yielding limit state were researched.Through the analysis of test data,basic principle,calculation formulas,seismic collapse resistance evaluation method of weak layer in RC frame structures based on Pushover was proposed.The results show that,RC column elastio-plastic damage is the intrinsic reason of degradation of weak layer strength and stiffness.the equivalent negative stiffness resulted from vertical load is the external conditions of the lateral stiffness loss.The main factors of collapse resistance include vertical dynamic amplification coefficient λ,stiffness degradation coefficientβu and rigidity-to-gravity ratio ξ,and framework layer yielding is in collapse critical state when λ =βuξ.Finally,the problems that may need further research on seismic collapse resistance are proposed.关键词
钢筋混凝土框架/薄弱层倒塌临界状态/抗倒塌能力评价方法Key words
RC frame/ weak layer collapse critical state/ seismic collapse resistance evaluation method分类
建筑与水利引用本文复制引用
贾浩华,魏德敏..钢筋混凝土框架结构抗层屈服倒塌能力评价方法研究[J].建筑结构学报,2013,34(7):40-46,7.基金项目
国家自然科学基金项目(90815012). （90815012）
