双相体不锈钢筋混凝土短柱轴压试验及数值研究  

Axial Compression Test and Numerical Study of Duplex Stainless Steel Reinforced Concrete Short Columns

作　　者：李宏伟 张蕊蕊 邓瑞婷 李然 李海云 刘东亮 LI Hongwei;ZHANG Ruirui;DENG Ruiting;LI Ran;Li Haiyun;Liu Dongliang(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Baoding Xinyuan Construction Engineering Co.,Ltd.,Baoding 071000,China)

机构地区：[1]石家庄铁道大学土木工程学院,石家庄050043 [2]保定市信远建设工程有限公司,河北保定071000

出　　处：《华北地震科学》2024年第4期44-50,85,共8页North China Earthquake Sciences

基　　金：河北省建设科技研究项目(2021-2066)。

摘　　要：为探究双相体不锈钢筋混凝土柱的力学性能,设计5根双相体不锈钢筋混凝土柱进行轴心受压试验,对破坏现象、混凝土强度和纵筋配筋率等参数进行分析,建立考虑材料非线性的ABAQUS有限元模型,并开展参数化拓展分析。结果表明:C30混凝土强度等级提高至C80时,试验柱的承载力提升幅度达到46%,但是其峰值承载力的增长率下降至6.9%;试验柱的峰值承载力和峰值位移随着纵筋配筋率的增大而提升,当配筋率在0.5%~6%之间时,其峰值承载力增长率在8.9%~36.9%,峰值位移增长率在6.2%~28.9%,综合考虑,建议双相体不锈钢筋混凝土柱纵筋配筋率为1%~4%之间;基于试验和模拟结果提出适用于双相体不锈钢筋混凝土柱的轴压承载力计算公式,研究得出纵筋配筋率建议值和轴压承载力计算公式,可为研究双相体不锈钢筋混凝土轴压短柱的设计和承载力的预测提供参考。In order to explore the mechanical properties of duplex stainless steel reinforced concrete columns,five duplex stainless steel reinforced concrete columns were designed for axial compression testing.The failure phenomenon,concrete strength and longitudinal reinforcement ratio were analyzed.The ABAQUS finite element model considering material nonlinearity was established,and the parametric expansion analysis was carried out.The results show that when the strength grade of C30 concrete increases to C80,the bearing capacity of the test column increased by 46%,but the growth rate of its peak bearing capacity decreased to 6.9%.The peak bearing capacity and peak displacement of the test column increase with the longitudinal reinforcement ratio.When the reinforcement ratio is between 0.5%and 6%,the peak bearing capacity growth rate is between 8.9%and 36.9%,and the peak displacement growth rate is between 6.2%and 28.9%.Considering comprehensively,it is recommended that the longitudinal reinforcement ratio of the duplex stainless steel reinforced concrete column should be between 1%and 4%.Based on the experimental and simulation results,a formula for calculating the axial compression bearing capacity of duplex stainless steel reinforced concrete columns is proposed.The recommended value of longitudinal reinforcement ratio and the calculation formula of axial compression bearing capacity are obtained,which can provide reference for the design and bearing capacity prediction of duplex stainless steel reinforced concrete short columns under axial compression.

关 键 词：双相体不锈钢筋 轴心受压 混凝土柱 力学性能 

分 类 号：P315.92[天文地球—地震学]