高强钢筋混凝土柱轴心受压承载力可靠度研究  

Study on reliability of axial compression bearing capacity of high strength reinforced concrete columns

作　　者：戎贤 申成成 张健新 RONG Xian;SHEN Chengcheng;ZHANG Jianxin(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Beijing Transmission and Distribution Limited Company,Beijing 102401,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]北京送变电有限公司,北京102401

出　　处：《世界地震工程》2019年第3期21-27,共7页World Earthquake Engineering

基　　金：河北省自然科学基金(E2017202278、E2018202290、E2019202064);河北省交通运输厅科技计划项目(HE1728);天津建委科技项目(2016-8);河北省高层次人才资助项目(B2017003003)

摘　　要：课题组搜集186根高强钢筋混凝土轴压柱的试验数据,得到相关统计参数,选用JC法并利用MATLAB软件编制计算程序迭代求解高强钢筋混凝土柱轴压承载力可靠指标。分析不同荷载组合、钢筋强度、混凝土强度以及配筋率等参数对混凝土柱轴压承载力可靠指标的影响。研究结果表明:高强钢筋混凝土柱轴压承载力可靠指标随计算模式不确定性系数的增大而增大;随着荷载效应比的增大,可靠指标呈现出先增大后减小的趋势;可靠指标随钢筋强度的提高而减小,随混凝土强度提高而增大;随着配筋率的增大,可靠指标逐渐减小,高配筋率对轴压构件不利。The research team collected the experimental data of 186 high-strength reinforced concrete axial columns,obtained relevant statistical parameters,and made a computing code in MATLAB based on JC method to calculate the reliability index for the axial compressive capacity of high-strength reinforced concrete columns.The effects of different load combinations,steel strengths,concrete strengths and reinforcement ratios on the reliability index were analyzed.The results show that the reliability index increases with the increase of the uncertainty coefficient of the calculation model.As the load-effect ratio increases,the reliability index increases first and then decreases.The index decreases as the strength of the steel bar increases,while increases as the concrete strength increases.With the increase of the reinforcement ratio,the reliability index decreases gradually,and the high reinforcement ratio is unfavorable for the axial compression member.

关 键 词：高强钢筋 轴压柱 承载力 可靠度 

分 类 号：TU375.3[建筑科学—结构工程]