重复荷载下600 MPa级钢筋混凝土轴压柱受力性能研究  

Research on behaviors of reinforced concrete axial columns with 600 MPa steel bars under repeated load

作　　者：李艳艳 刘彬 LI Yan-yan;LIU Bin(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]河北工业大学土木与交通学院

出　　处：《广西大学学报（自然科学版）》2019年第6期1513-1519,共7页Journal of Guangxi University（Natural Science Edition）

基　　金：河北省自然科学基金资助项目(E2017202278,E2019202064);河北省交通运输厅科技计划项目(QG2018-2)

摘　　要：为研究高强钢筋混凝土柱受压性能,对8根配置600 MPa级钢筋、1根配置HRB400钢筋和1根配置HRB500钢筋的混凝土轴心受压构件进行重复荷载下受力性能的试验,分析混凝土强度、纵筋配筋率和配箍率对600 MPa级钢筋混凝土构件的破坏形态、名义应力—应变曲线和峰值应变的影响。研究结果表明,轴压试件的峰值应力会随着混凝土强度的提高而增大,但峰值应变却略有减小;轴压构件的峰值应变会随纵筋配筋率的增大而增大,但当配筋率较大时,则影响不大;轴压构件的峰值应力和峰值应变随体积配箍率的提高而增大。配置600 MPa级钢筋轴心受压构件的受压承载力可按现行规范规定的公式计算,建议600 MPa级钢筋的抗压强度设计值取400 N/mm^2。In order to study the compressive behaviors of RC column,eight specimens with 600 MPa steel bars,one with 400 MPa steel bars and one with 500 MPa steel bars were tested under repeated axial loads.The influence of concrete strength,reinforcement ratio and stirrup ratio on the failure mode of specimens,stress-strain curves and peak strain were comparatively analyzed.The results show that the peak stress of the axial compression specimens increase with the increase of concrete strength,but the peak strain decreases slightly.The peak strain of the compression components increases with the increase of the longitudinal ratio of reinforcement,but the effect is not clear when the ratio is great.The peak stress and peak strain of the axial compression members also increase with the increase of the volumetric percentage of stirrups.The bearing capacity of axis-pressed column can be calculated according to the formula of code in use.The design value of the compressive strength of the 600 MPa steel bar can be taken as the value of 400 MPa.

关 键 词：600 MPa级钢筋 受压构件 应力—应变曲线 抗压强度 

分 类 号：TU375[建筑科学—结构工程]