配置不锈钢筋的RPC短柱轴压性能试验研究  

Experimental study on axial compression performance of RPC columns with stainless steel bars

作　　者：李然 李宏伟 邓瑞婷 张蕊蕊 李海云 郄超群 Li Ran;Li Hongwei;Deng Ruiting;Zhang Ruirui;Li Haiyun;Qie Chaoqun(School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Engineering Innovation Center for Traffic Emergency and Guarantee,Shijiazhuang 050043,China;Baoding Municipal Maintenance Center,Baoding 071000,China)

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]河北省交通应急保障技术创新中心,河北石家庄050043 [3]保定市市政维护中心,河北保定071000

出　　处：《建筑科学》2024年第11期27-35,共9页Building Science

基　　金：河北省省级科技计划资助(225676104H);河北省建设科技研究项目指导性计划项目(2021-2066)。

摘　　要：为研究不锈钢筋RPC(SSRPC)短柱的轴压性能,对设计的7根不同混凝土强度和不同钢筋类型的短柱进行轴压试验,获得不同混凝土强度、纵筋强度、箍筋间距下柱的试验结果。运用ABAQUS软件对试验柱进行非线性有限元模拟验证和参数化拓展分析。结果表明:提高混凝土的强度等级,柱的承载力会有显著的提升;随着纵筋强度的增大SSRPC短柱的承载力和峰值位移无明显的增加,由有限元参数化分析可知当钢筋强度超过500MPa时柱的承载力无明显提升;SSRPC柱的峰值承载力和峰值位移会随着箍筋间距的增加而有所提升,过小的箍筋间距会降低构件的延性,建议箍筋间距取值为60~100mm。ABAQUS采用非线性材料本构模拟结果与试验结果吻合较好。基于试验和模拟结果提出适用于高强不锈钢筋RPC短柱的轴压承载力计算公式。In order to study the axial compression performance of reactive powder concrete short columns with stainless steel reinforcement(SSRPC),an axial compression test is conducted on seven short columns with different concrete strengths and reinforcement types.The test results of columns with different concrete strengths,longitudinal reinforcement strengths and stirrup spacing are obtained.The nonlinear finite element simulation verification and parametric expansion analysis of the test columns are carried out by using ABAQUS software.The results show that the bearing capacity of the column is significantly improved by increasing the concrete strength.As the strength of the longitudinal reinforcement strength increases,there is no significant increase in the bearing capacity and peak displacement of SSRPC short columns.According to the parametric finite element analysis,there is no significant improvement in the bearing capacity when the reinforcement strength exceeds 500MPa.The peak bearing capacity and peak displacement of SSRPC columns increase with the increase of stirrup spacing.However,too small stirrup spacing can reduce the ductility of the component.It is recommended that the stirrup spacing be set at 60~100mm.The simulation results using the nonlinear material constitutive model in ABAQUS are in good agreement with the experimental results.Based on the experimental and simulation results,a formula for calculating the axial compression bearing capacity of RPC short columns with high-strength stainless steel reinforcement is proposed.

关 键 词：不锈钢筋 RPC 轴心受压 承载能力 有限元分析 

分 类 号：TU398[建筑科学—结构工程]