地震工程学报2025，Vol.47Issue(5)：1102-1108,7.DOI:10.20000/j.1000-0844.20240411002
铁路自复位桥墩墩顶位移控制方法研究
Control methods for pier-top displacement in self-centering railway bridge piers
摘要
Abstract
To address excessive displacement at the top of self-centering railway bridge piers during near-fault earthquakes,this study introduces three control methods:enlarging the spread foundation dimen-sions,adding prestressed steel bars,and integrating energy-dissipating steel bars.Taking the 18#pier from a self-centering railway bridge design as a practical example,an analytical model was developed based on the OpenSees platform.Nonlinear time-history analysis was performed using seven near-fault ground motion records to assess the control efficacy of the three methods on pier-top dis-placement.The results demonstrate that all three methods effectively control displacement,with the scheme of energy-dissipating steel bars exhibiting the most pronounced mitigation effect,fol-lowed by the enlarged foundation scheme.However,the prestressed steel bars exhibit relatively lower effectiveness in displacement control.Notably,all methods increase the seismic bending moment at the pier base while achieving displacement control at the pier top.关键词
铁路/自复位桥墩/预应力钢筋/耗能钢筋/墩顶位移Key words
railway/self-centering pier/prestressed steel bar/energy-dissipating steel bar/pier-top displacement分类
交通工程引用本文复制引用
黄耀斌,夏修身,钟亚伟,戴胜勇..铁路自复位桥墩墩顶位移控制方法研究[J].地震工程学报,2025,47(5):1102-1108,7.基金项目
国家自然科学基金项目(52278186,52068041) （52278186,52068041）
兰州交通大学天佑创新团队(TY202007) （TY202007）
中国中铁股份有限公司科技研究开发计划课题(实用技术2022-重大-01) （实用技术2022-重大-01）
