【摘要】 将弹塑性纤维模型引入基于柔度法的非线性梁柱单元,通过有限元分析软件OpenSees对钢筋混凝土桥墩在低周反复荷载作用下的受力性能进行了模拟.对墩底截面内力、变形和钢筋受拉应变进行了参数分析.结果表明:墩底截面内力和刚度随轴压比和配筋率的增大而增大,截面变形和钢筋受拉应变随轴压比和配筋率的增大而减小,随着延性比的增加,轴压比较大的试件的截面曲率和受拉钢筋应变的增长程度更加显著,钢筋硬化参数对于分析结果有较大影响.更多还原

【Abstract】 Hysteretic performance of RC(reinforced concrete) bridge piers under low cycle reversed loads was analyzed by OpenSees software,after the fiber model was introduced into force based nonlinear beam column element.The parameters,such the section internal forces,deformation and tensile reinforcement strain of piers′ bottom,were analyzed.The following results are shown that: with the increase of axial compression ratio and reinforcement rate,the section internal force and stiffness of piers′ bottom increase;the section deformation and tensile reinforcement strain of piers′ bottom decrease;with the increase of ductility ratio,the growth degree of section curvature and tensile reinforcement strain of specimens with larger axial compression ratio is more obvious.The reinforced hardening parameter influences the analysis results markedly.更多还原