CHEN S, GUAN J W, LIANG S J,et al.Numerical analysis on mechanical properties of eccentrically loaded coral concrete columns reinforced with CFRP bars[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(1):175-184.

doi:10.16186/j.cnki.1673-9787.2020110079

Received:2020/11/25

Revised:2021/03/11

Published:2023/01/25

Numerical analysis on mechanical properties of eccentrically loaded coral concrete columns reinforced with CFRP bars

CHEN Shuang1,3, GUAN Jiwen2,3, LIANG Shujia3, CHEN Hongmei3

1.College of Civil Engineering and Architecture，Guangxi University of Science and Technology，Liuzhou  545006，Guangxi，China；2.College of Civil Engineering and Architecture，Nanning University，Nanning  530200，Guangxi，China；3.College of Civil Engineering and Architecture，Guilin University of Technology，Guilin  541004，Guangxi，China

Abstract:To study the mechanical properties of eccentric compression coral concrete column with CFRP bars reinforced，the numerical analysis of 30 test columns were carried out by ANSYS.The effects of eccentricity，length to height ratio and longitudinal reinforcement ratio on the ultimate bearing capacity，the stress of concrete on compression side，the mid-span deflection and displacement of specimens were measured and analyzed.The results indicated that the increase of eccentricity and length to height ratio not only decreased the ultimate bearing capacity，but also resulted in critical mid-span deflection.The ultimate stress of concrete on compression side in specimen PY-60 was only 23 MPa，about 1/2 of the ultimate stress of concrete of axial specimen PY-0.Meanwhile，the ultimate bearing capacity was improved by increasing the longitudinal reinforcement ratio of specimens.Subsequently，the second-order flexural effect was analyzed，based on the current code，the calculation method of moment magnification factor η_ns on CFRP reinforced coral concrete eccentric compression column was put forward and corrected adaptively in the paper.The theoretical calculation results agreed well with the experimental results of existing studies，which had guiding values to a certain extent.

Key words:CFRP bar;coral concrete column;eccentrical load;moment magnification factor

 CFRP筋-珊瑚混凝土柱偏压力学性能数值分析_陈爽.pdf