ZHANG X G, ZHANG S P, DING Y H, et al.Axial compressive behavior analysis of sand-lightweight aggregate concrete-filled steel tubular stub column[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(4):162-171.

doi:10.16186/j.cnki.1673-9787.2021060075

Received:2021/06/20

Revised:2021/10/27

Published:2023/07/25

Axial compressive behavior analysis of sand-lightweight aggregate concrete-filled steel tubular stub column

ZHANG Xianggang1,2, ZHANG Songpeng1, DING Yahong1, XUE Jianyang3, XU Ping1

1.School of Civil Engineering，Henan Polytechnic University，Jiaozuo  454000，Henan，China;2.Henan Key Laboratory of Special Protective Materials，Luoyang  471000，Henan，China;3.School of Civil Engineering，Xi’an University of Architecture and Technology，Xi’an  710055，Shaanxi，China

Abstract:In order to further understand the axial compression mechanical properties of sand- lightweight aggregate concrete-filled steel tubular stub columns，based on the available test data，the plastic damage model was then used to verify those specimens and perform he whole process analysis with a finite element.The effects of varying parameters on the compressive behavior of the specimens were investigated，and the extent to which these varying parameters related to the ultimate bearing capacity of SLACFST was assessed via a grey correlation analysis.Results showed that the calculated ultimate bearing capacity and peak displacement could be consistent with the experimental value within the error，and the simulated failure mode of the control specimen was basically the same as the experimental failure mode.The mechanical process of the steel tube and the core sand-lightweight aggregate concrete showed a synergistic effect.As steel tube yield strength was more than 345 MPa，to improve the yield strength of steel tube couldn’t significantly improve the ultimate bearing capacity of the specimen.The replacement ratio of river sand had the least influence on the ultimate bearing capacity of SLACFST stub columns.

Key words:sand-lightweight aggregate concrete-filled steel tubular;finite element analysis;whole process analysis;grey correlation analysis

钢管砂轻混凝土短柱轴压力学性能分析_张向冈.pdf