摘要
刚构悬索组合体系桥梁可以改善常规大跨径连续刚构桥跨中持续下挠问题。文章选择一座跨径组合的刚构悬索组合桥梁为研究对象,采用OpenSees软件建立其弹塑性三维动力有限元模型,对其进行非线性时程分析和易损性分析。结果表明,刚构悬索组合体系的动力特性与刚构桥类似。矢跨比会对横桥向地震作用下的塔顶位移、塔底弯矩和墩顶弯矩产生影响。易损性分析结果显示,桥塔在地震作用下基本保持弹性。
Rigid-frame suspension composite bridges can relieve the problem of continuous mid-span deflection of traditional long-span continuous rigid-frame bridges.In this paper,a rigid-frame suspension composite bridge with span combination was selected as the case study.The elastoplastic three-dimensional dynamic finite element model of the bridge was built by OpenSees software.Nonlinear time history analysis and fragility analysis were carried out.The results show that the dynamic characteristics of the rigid-frame suspension bridge are similar to those of rigid-frame bridge.The rise-span ratio affects the displacement at the top of tower,the bending moments at the bottom of tower and at the top of pier under transverse earthquake.The results of fragility analysis show that the bridge tower remains elastic under earthquakes.
作者
张雪健
何敏
刘笑显
殷永高
曹小祥
ZHANG Xuejian;HE Min;LIU Xiaoxian;YIN Yonggao;CAO Xiaoxiang(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China;Anhui Transportation Holding Group Co.,Ltd.,Hefei 230088,China)
出处
《合肥工业大学学报(自然科学版)》
北大核心
2025年第6期852-857,共6页
Journal of Hefei University of Technology:Natural Science
基金
国家自然科学基金资助项目(52108131)
安徽省交通控股集团科技资助项目(JKKJ-2020-02)。
关键词
抗震性能
刚构悬索组合体系桥梁
矢跨比
易损性分析
seismic performance
rigid-frame suspension composite bridges
rise-span ratio
fragility analysis
