摘要
为了进一步研究自复位桥墩的抗震性能,基于有限元软件ABAQUS建立圆形自复位空心桥墩模型。对模型施加低周往复荷载,进行拟静力分析。以耗能能力、极限位移、屈服荷载、极限荷载、屈服位移为研究目标,对比分析在不同耗能钢筋配筋率(分别为0.2%,0.22%,0.24%,0.26%,0.28%,0.30%)下自复位空心桥墩的的抗震性能。结果表明,圆形自复位空心桥墩可有效减小残余位移;随着耗能钢筋配筋率的增加,自复位桥墩屈服位移保持不变,屈服荷载、桥墩耗能能力逐渐增大;当耗能钢筋配筋率超过0.28%时,桥墩耗能能力提升趋势、极限位移下降趋势有所减缓;为避免耗能钢筋失效,桥墩产生过大残余变形,同时保证自复位空心桥墩抗震性能,耗能钢筋配筋率宜控制为0.24%~0.28%。
To further study the seismic performance of the self-centering piers,a circular self-centering hollow bridge model is established based on the finite element software ABAQUS.The low-circum-to-reload is applied to the model,and the static force is analyzed.Taking the energy consumption capacity,ultimate displacement,yield load,ultimate load,yield displacement as the research objectives,the seismic performance of the self-centering hollow bridge under different energy-consuming rebar rates(0.2%,0.22%,0.24%,0.26%,0.20%)was analyzed,respectively.The results show that the self-centering hollow bridge pier can effectively reduce the residual displacement.With the increase of the energy-consuming rebar rate,the yield displacement remains same,while the yield load and the energy consumption gradually increase.When the energy-consuming rebar rate exceeds 0.28%,the increase trend of the bridge's energy consumption and the downward trend of the extreme displacement decrease.In order to avoid the failure of the energy-consuming rebar,the bridge pier produces excessive residual deformation,ands ensuring the seismic performance of the self-centering hollow bridge pier,the rate of energy-consuming rebar should be controlled from 0.24%to 0.28%.
作者
吕亚军
王大鹏
LV Yajun;WANG Dapeng(College of Civil Engineering,Suzhou University of Science and Technology,Jiangsu Suzhou 215011,China;Key Laboratory of structural Engineering,Jiangsu Suzhou 215011,China)
出处
《低温建筑技术》
2019年第10期56-59,62,共5页
Low Temperature Architecture Technology
关键词
桥梁抗震
自复位桥墩
耗能钢筋配筋率
耗能性能
seismic resistance of bridge
self-centering hollow bridge pier
energy-consuming rebar rate
energy consumption performance
