铁道标准设计2017，Vol.61Issue(9)：82-86,5.DOI:10.13238/j.issn.1004-2954.2017.09.018
基于谱分解法的自锚式悬索桥桥梁风致抖振计算分析
Buffeting Analysis of Self-anchored Suspension Bridge Wind Resistance Based on Spectral Representation Method
韩兴 1黄博 1祝兵 1曾志文1
作者信息
- 1. 西南交通大学土木工程学院,成都610031
- 折叠
摘要
Abstract
Since long span self-anchored suspension bridge is a large-span flexible structural system,large buffeting response tends to occur due to fluctuating wind,and the study of this kind of bridge with wind-induced buffeting has great practical significance.This paper focuses on wind-induced buffeting analysis of Wuhan Hanjiang No.6 bridge of self-anchored suspension bridge.The specific analysis process is shown as the followings:by using the CFD software of the bridge aerodynamic analysis of bridge,three static component coefficients in wind resistance analysis of the important parameters in the equations are obtained.With the analysis of the wind field data related to bridge location and the adoption of the codes specified wind spectral density function,the fluctuating wind spectrum is transferred into fluctuating wind time-history data through spectral representation method.The fluctuating wind timehistory date can be switched into wind force time-history data based on quasi-steady aerodynamic theory.Finite element models of the bridge are developed using a widely-used software to analyze dynamic characteristics of the bridge.Combining the numerical procedures with finite element software to put the wind load on FE model,the study conducts the numerical simulation of the bridge buffeting response under wind force.The results show that the bridge under the wind-induced shaking up has good performance and good pneumatic structure.The wind resistance calculation method and mode with the combination of the computational fluid dynamics software,the numerical analysis software and the finite element software of bridge can be used as reference for the calculation of other self-anchored suspension bridge buffeting.关键词
桥梁抗风/自锚式悬索桥/抖振/随机振动/谱分解法Key words
Wind resistance of bridge/Self-anchored suspension bridge/Chattering/Random vibration/Finite element method分类
交通工程引用本文复制引用
韩兴,黄博,祝兵,曾志文..基于谱分解法的自锚式悬索桥桥梁风致抖振计算分析[J].铁道标准设计,2017,61(9):82-86,5.
