山东建筑大学学报2024，Vol.39Issue(2)：27-37,79,12.DOI:10.12077/sdjz.2024.02.004
不同柱失效对T型钢连接子结构抗倒塌性能影响
Effect of different column failures on collapse resistance of T-stub connection substructure
摘要
Abstract
Structural collapse will cause serious casualties and huge property losses,and studying collapse resistance of the structure can provide essential guidance and reference for structural design.Through the finite element numerical simulations on beam-column substructures experiencing different column failure scenarios,the failure mode and resistance mechanism of the structure were deeply analyzed,and the influence of span ratio on collapse resistance of beam-column substructure under corner column failure was discussed.The results show that prior to middle column failure,the load it bears will be transferred to the side column more through the beam connected to the major axis direction of the failed column during the early stages of deformation post-failure.However,during the stages of significant deformation that follow,the load transfer capacity between the major and minor axis directions shows little difference;Under the condition of side column failure,catenary mechanism only occurs in the beam in the symmetrical direction;In the case of corner column failure,the substructure's beams only experienced the stage of bending mechanism;Among the three column failure scenarios analyzed,corner column failure is identified as the most perilous due to the absence of a catenary mechanism in the beam components;In the case of corner column failure,the ultimate load-bearing capacity of beam-column substructure decreases gradually with the increase of span ratio.关键词
连续倒塌/T型钢节点/不同柱失效/跨度比/抗力机制Key words
progressive collapse/T-stub connections/different column failures/span ratio/resistance mechanism分类
建筑与水利引用本文复制引用
陈红,谭英华,郭玉旭,席丰..不同柱失效对T型钢连接子结构抗倒塌性能影响[J].山东建筑大学学报,2024,39(2):27-37,79,12.基金项目
国家自然科学基金项目(12172198,11672165) （12172198,11672165）
山东省研究生教育优质课程建设项目(SDYKC20158) （SDYKC20158）
