高强方钢管高强混凝土压弯构件的滞回性能研究  

HYSTERETIC PROPERTIES OF HIGH-STRENGTH-CONCRETE-FILLED HIGH-STRENGTH-SQUARE-STEEL-TUBE BEAM-COLUMNS

作　　者：邱增美 李帼昌[1] 杨志坚[1] QIU Zengmei;LI Guochang;YANG Zhijian(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《工业建筑》2020年第12期119-125,共7页Industrial Construction

基　　金：“十三五”国家重点研发课题项目(2018YFC0705704);国家自然科学基金重点项目(51938009)。

摘　　要：通过对6个高强方钢管高强混凝土压弯构件的往复荷载试验,变化参数为轴压比,研究该类构件的破坏形态、荷载-位移滞回曲线、荷载-位移骨架曲线和延性性能。并采用ABAQUS有限元分析软件,建立了适合高强方钢管高强混凝土压弯构件的数值模型,进一步分析钢材屈服强度、混凝土抗压强度、含钢率、轴压比和长细比等参数对构件承载能力的影响。研究结果表明:构件的承载能力随着钢材屈服强度、含钢率的提高而提高;随着长细比的增加而减小,核心混凝土抗压强度和轴压比对承载能力的影响均较小。Cyclic test was conducted on six high-strength concrete filled high-strength square steel tube(HCFHST)beam-columns to study their hysteretic behaviors in this paper.The main parameter was the axial load ratio.The failure modes,the load versus displacement hysteretic curves,the load versus displacement envelope curves and the ductility of the beam-columns were studied.Additionally,numerical model was established by the numerical analysis software ABAQUS to study the influence of the parameters on the bearing capacity of the HCFHST beam-columns with different steel yield strengths,concrete compression strengths,steel ratio,axial load ratios and slenderness ratios.Test results indicated that increasing the steel yield strength and steel ratio could increase the bearing capacity.The bearing capacity decreased with the increase of slenderness ratio.Additionally,the changing of concrete compressive strength and axial load ratio had no obvious effect on the bearing capacity.

关 键 词：高强方钢管高强混凝土 轴压比 滞回性能 延性 承载力 

分 类 号：TU398.9[建筑科学—结构工程]