大跨度三塔自锚式悬索桥横向减震体系的研究
Research on Transverse Damping System of Large Span Three-tower Self-anchored Suspension Bridge
李盘山 1陈张伟 2周宁 1欧光鲲 1刘春香 1王冬3
作者信息
- 1. 山东易方达建设项目管理有限公司 济南市 250000
- 2. 上海市政工程设计研究总院(集团)有限公司 上海市 200092
- 3. 济南城市建设集团有限公司 济南市 250000
- 折叠
摘要
以在建某悬索桥为工程背景,采用大型有限元软件SAP2000建立全桥三维有限元杆系模型,研究滑动支座+钢阻尼器的横向组合减震体系的减震特性,通过分析优化选取恰当的钢阻尼器参数进行数值模拟分析.与横向固定约束体系对比,本研究给出的横向组合减震体系能显著减小各桥墩和桥塔基础的地震需求,同时能不同程度地减小各桥墩和桥塔关键截面的剪力和弯矩,并能够有效地控制墩、梁的相对位移.因此,本研究提出的横向组合约束体系是较为合理的,可为同类型桥梁的减震提供借鉴参考.
Abstract
Taking a suspension bridge under construction as the engineering background,a three-dimensional finite element model of the whole bridge is established by using the large-scale finite element calculation software SAP2000.The damping characteristics of the lateral combined damping system of sliding bearing+steel damper are studied.The appropriate steel damper parameters are selected for numerical simulation analysis.Compared with the lateral fixed constraint system,the lateral combined damping system given in this paper can significantly reduce the seismic demand of each pier and tower foundation,and can reduce the shear force and bending moment of the key sections of each pier and tower to different degrees,and can effectively control the relative displacement of piers and beams.Therefore,the transverse combined constraint system proposed in this paper is more reasonable,which can provide reference for the shock absorption of the same type of bridge.
关键词
悬索桥/钢阻尼器/横向组合减震体系/有限元分析Key words
suspension bridge/metallic damper/transverse combination damping system/finite element analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据