焊接环式箍筋约束高强混凝土柱抗震性能研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (5) : 75-84.

论文

白巨巨，李升才，朱永浦

作者信息 +

Aseismic performance of high strength concrete columns confined by welded hoop stirrups

BAI Juju, LI Shengcai, ZHU Yongpu

Author information +

文章历史 +

摘要

通过室内模型低周往复加载试验及非线性有限元分析，对焊接环式箍筋约束高强混凝土柱的抗震性能进行了研究。研究了轴压比、配箍率两个参数对柱抗震性能的影响规律。结果表明：通过ABAQUS软件对焊接环式箍筋约束高强混凝土柱的有限元分析结果与试验结果符合较好；随着轴压比的提高，柱的水平承载力变大，延性和耗能能力变差，骨架曲线的强度下降段较陡；随着体积配箍率的增大，柱的承载力、延性和耗能能力均有所提升. 通过回归分析，得出适用于焊接环式箍筋约束高强混凝土柱的抗剪承载力的公式，可供设计参考。

Abstract

The seismic behavior of high strength concrete columns confined by butt-welded closed stirrups was studied with the indoor model low cyclic reversed loading experiment and non-linear FEM analysis. The influence of axial compression ratio and volume-stirrup ratio on seismic behavior of the columns was studied. The consequences indicate that the finite element analysis results of high strength concrete columns confined by butt-welded closed stirrups which were obtained by ABAQUS software agree with the experimental results well; With the increase of axial compression ratio, the ultimate bearing capacity of the specimen increases, ductility and energy dissipation capacity become worse, the strength descending part of the shear displacement skeleton curve gets steeper; With the increase of the volume-stirrup ratio, the ultimate bearing capacity of the specimen increases, the ductility and energy dissipation get better. Through regression analysis, the formula of shear capacity of high strength concrete columns confined by butt-welded closed stirrups was also obtained, witch can be reference for design.

导出引用

白巨巨，李升才，朱永浦. 焊接环式箍筋约束高强混凝土柱抗震性能研究[J]. 振动与冲击, 2021, 40(5): 75-84

BAI Juju, LI Shengcai, ZHU Yongpu. Aseismic performance of high strength concrete columns confined by welded hoop stirrups[J]. Journal of Vibration and Shock, 2021, 40(5): 75-84

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