华中科技大学学报（自然科学版）2025，Vol.53Issue(2)：78-87,10.DOI:10.13245/j.hust.250677
椭圆墩底隔震桥墩滞回特性研究
Study on hysteresis characteristics of isolated pier with elliptical pier bottom
摘要
Abstract
To study the hysteresis characteristics of isolated pier with elliptical pier bottom(IP-EPB),the pseudo-static tests were conducted on IP-EPBs before and after reinforcement,and the hysteresis characteristics of IP-EPBs before and after reinforcement were compared and analyzed.On this basis,the finite element model of an IP-EPB was established to study the effect of the long radius of the ellipse as well as the ratio of the long to short radii of the ellipse on the hysteresis characteristics of the IP-EPB.The results show that the lateral strength capacity and lateral stiffness of the IP-EPB can be improved by reinforcing pier bottom horseshoe,and the residual displacement and energy dissipation capacity of the IP-EPB are reduced by reinforcing pier bottom horseshoe.Increasing the long radius of the ellipse can enhance the lateral strength capacity and energy dissipation capacity of the IP-EPB.However,a larger value of long radius of the ellipse can lead to the yield failure of pier bottom.Therefore,it is recommended that the ratio of the long radius of the ellipse to the sectional height of pier bottom is 1.00～1.67.Increasing the ratio of the long to short radii of the ellipse can improve the self-centering ability of the IP-EPB and reduce the energy dissipation capacity of the IP-EPB.In order to ensure that the IP-EPB has good energy dissipation and self-centering abilities,it is suggested that the ratio of the long to short radii of the ellipse is 3～5.关键词
桥梁抗震/椭圆墩底隔震桥墩/滞回特性/拟静力试验/椭圆长半径/椭圆长短半径之比Key words
seismic design of bridge/isolated pier with elliptical pier bottom/hysteresis characteristic/pseudo-static test/the long radius of the ellipse/the ratio of the long to short radii of the ellipse分类
交通工程引用本文复制引用
方蓉,张文学,张国伟,焦驰宇..椭圆墩底隔震桥墩滞回特性研究[J].华中科技大学学报（自然科学版）,2025,53(2):78-87,10.基金项目
国家自然科学基金面上项目(51778022) （51778022）
北京市博士后工作经费资助项目(2023-zz-137) （2023-zz-137）
北京建筑大学青年教师科研能力提升计划资助项目(X23006). （X23006）
