摘要
钢结构特别是焊接钢结构对动荷载特别敏感。武广客运专线武汉火车站采用了新型的"桥建合一"的结构型式,在长期往复动荷载作用下,上部大跨度钢结构的疲劳寿命令人关注。建立了铸钢节点包括焊缝的精细有限元模型,基于热点应力法和Miner线性累积损伤理论,分析了武汉站上部大跨度钢结构10管相贯焊接铸钢节点的疲劳寿命,结果表明:列车振动荷载引起的动应力对铸钢节点的疲劳寿命影响不大,满足结构使用寿命100年的要求。该分析方法可为国内类似结构的疲劳寿命分析提供参考。
A new structure type,called the unification of bridge and building,was adopted in Wuhan railway station of the passenger special line from Wuhan to Guangzhou.Much attention must be paid to the fatigue life of such long-span steel structure because of the long-term dynamic load.A refined finite element calculation model of ten tubes welded cast steel joint,including the welding seam,was built and its fatigue life was analyzed based on hot spot stress method and Miner linear cumulative damage theory.The results show that the dynamic stress caused by train load has little influence on the fatigue life of cast steel joint,and the large-steel structure can meet the demand of service life of 100 years.The analysis method can provide reference to fatigue life evaluation of similar structures in the future in China.
出处
《振动与冲击》
EI
CSCD
北大核心
2011年第9期55-58,75,共5页
Journal of Vibration and Shock
基金
铁路环境振动与噪声教育部工程研究中心开放基金项目
教育部2008年博士点基金项目(200804970007)
铁道部2007年重大科技攻关项目(A类)
2008年湖北省建设科技计划项目(K200716)
关键词
桥建合一
焊接铸钢节点
疲劳
热点应力法
线性累积损伤
unification of bridge and building
welded cast steel joint
fatigue
hot spot stress method
linear cumulative damage
