防灾减灾工程学报2024，Vol.44Issue(3)：616-622,631,8.DOI:10.13409/j.cnki.jdpme.20221014002
四肢钢管混凝土格构柱试验研究及参数分析
Experimental Study and Parameter Analysis of Four-tube Concrete-filled Steel Tube Lattice Columns
摘要
Abstract
To investigate the stress mechanism and seismic performance of the four-tube concrete-filled steel tube(CFST)lattice columns,quasi-static tests and finite element analysis were conducted on four specimens.The hysteresis and skeleton curves of the four-tube CFST lattice columns under low-cycle repeated loads were obtained through experiments,and the failure process of the specimens was analyzed.The results showed that the lattice columns exhibited good energy dissipation capacity and ductility.The axial compression ratio mainly affected the specimens during the failure stage,with a larger axial compression ratio leading to a greater slope in the descending section of the bearing ca-pacity.However,the slenderness ratio had a significant effect on the stress performance of the speci-mens.With the increase in slenderness ratio,the yield and ultimate displacement of the specimens in-creased,but the horizontal bearing capacity and the slope in the failure section decreased.A numerical calculation model was established and compared with the experimental results to verify its accuracy.The effects of parameters,including different height-to-width ratios and ratios of section spacing to the column outer diameter,on the specimens'elastic stiffness and bearing capacity were analyzed.The re-sults indicated that reducing the height-to-width ratio and the ratio of section spacing to column outer diameter significantly improved the stress performance of CFST lattice columns.It is suggested that in practical engineering,the height-to-width ratio of the columns should not exceed 4.8,and the ratio of spacing between limbs to column outer diameter should not exceed 7.0.关键词
钢管混凝土/格构柱/拟静力试验/参数分析/抗震性能/有限元分析Key words
concrete-filled steel tube/lattice columns/quasi-static test/parameter analysis/seismic per-formance/finite element analysis分类
建筑与水利引用本文复制引用
黄志,熊陆增,蒋丽忠,周旺保,谌湘文,戚菁菁..四肢钢管混凝土格构柱试验研究及参数分析[J].防灾减灾工程学报,2024,44(3):616-622,631,8.基金项目
湖南省教育厅科学研究优秀青年项目(20B214)、国家自然科学基金(51808213)、湖南省自然科学基金(2019JJ50185)、湖南省教育厅科学研究项目(20A184)资助 （20B214）
