建筑结构学报2024，Vol.45Issue(3)：123-135,13.DOI:10.14006/j.jzjgxb.2023.0029
分离式型钢混凝土柱抗震性能试验研究
Experimental study on seismic performance of concrete-encased column reinforced with multiple steel sections
摘要
Abstract
Concrete-encased columns reinforced with one built-up steel core are widely used as mega columns in high-rise buildings.Due to the large size of the steel core and the limitation of lifting capacity,multiple core segments are welded and spliced on-site,which might impact the integrity and ductility of the columns.To address this issue,one method using multiple individual steel sections to replace one gigantic built-up section is proposed to increase the erection length of each segment,thus,reducing the number of splicing locations within the columns.A quasi-static cyclic lateral load was applied to the specimens to investigate the seismic performance of the columns subjected to combined vertical force and bending moment.The maximum load capacity,ultimate deformation,energy dissipation and stiffness degradation were analysed.The test results show that compared to the specimen with one steel section,the specimen with multiple steel sections exhibits similar performance in terms of maximum shear force and ultimate deformation and could dissipate considerable amount of energy under cyclic loading.Also,a sudden loss of lateral stiffness is not observed in the specimen with multiple steel sections after the peak shear force.At an eccentricity ratio of 20％,the strain distribution of the steel sections remains relatively linear,indicating that the strain compatibility is still valid.关键词
型钢混凝土柱/分离式型钢/拟静力试验/抗震性能/平截面假定Key words
concrete-encased column/multiple steel section/quasi-static test/seismic performance/strain compatibility分类
建筑与水利引用本文复制引用
赵航,黄刚,范峰,包联进,孙建运,孙飞飞..分离式型钢混凝土柱抗震性能试验研究[J].建筑结构学报,2024,45(3):123-135,13.基金项目
中国建筑股份有限公司科技创新平台(CSCEC-PT-001). （CSCEC-PT-001）
