吉首大学学报（自然科学版）2024，Vol.45Issue(2)：45-55,11.DOI:10.13438/j.cnki.jdzk.2024.02.007
基于摩擦摆球型支座的多跨曲线连续梁桥抗震性能
Seismic Performance Analysis of Multi-Span Curved Continuous Girder Bridges Based on Friction Pendulum Spherical Bearings
摘要
Abstract
To study the seismic performance and vibration isolation method of multi-span curved continuous gird-er bridge,a finite element model is established for the multi-span curved continuous girder bridge with friction pendulum spherical bearings,and the dynamic characteristics and nonlinear time analysis is carried out.Results show that the longitudinal stiffness of the bridge model is weaker than the transverse stiffness,and the first-order vibration mode contributes more to the longitudinal seismic response of the bridge pier,and the vibration mode participation coefficient is 29.8％;the sixth-order vibration mode contributes more to the transverse seismic re-sponse of the bridge pier,and the vibration mode participation coefficient is 20％;under the E1 earthquake,the friction pendulum spherical bearing can keep the bridge in elastic working condition,and the bearing deformation and expansion joint width meet the requirements,which proves the effectiveness of the selected and arranged fric-tion pendulum spherical bearing;under the E2 earthquake,the maximum bending moment demand of the section of some piers is greater than the bending capacity of the section,but further strength tests were carried out on the piers,and they all meet the seismic demand.关键词
多跨曲线连续梁桥/摩擦摆球型支座/减隔震/抗震性能Key words
multi-span continuous curve beam bridge/friction pendulum spherical bearing/seismic isola-tion design/seismic performance分类
建筑与水利引用本文复制引用
李悦,宁哲,晏勇,单宏兰,罗安然..基于摩擦摆球型支座的多跨曲线连续梁桥抗震性能[J].吉首大学学报（自然科学版）,2024,45(2):45-55,11.基金项目
National Natural Science Foundation of China(51408009) （51408009）
Basic Research Funds for Universities in Beijing(110052971921/062) （110052971921/062）
