铁路正交异性钢桥面板疲劳应力分析与寿命评估

发布时间：2018-05-20 14:24

  本文选题：铁路桥梁 + 正交异性钢桥面板　； 参考：《铁道建筑》2017年11期

【摘要】：以南京大胜关长江大桥为对象,建立铁路正交异性钢桥面板结构有限元模型,基于热点应力法对典型构造细节的疲劳应力进行计算分析,得到此类桥面结构的疲劳易损区。结合桥梁实际使用情况,基于美国公路桥梁设计规范(AASHTO规范)对桥面板典型焊接细节的疲劳寿命开展计算与评估,结果表明,疲劳Ⅰ与疲劳Ⅱ极限状态下5类疲劳易损构造细节的疲劳应力幅计算值均小于容许值,疲劳寿命满足设计要求。
[Abstract]:Taking the Dashengguan Yangtze River Bridge in Nanjing as an example, a finite element model of orthotropic steel bridge slab structure is established. The fatigue stress of typical structural details is calculated and analyzed based on the hot spot stress method, and the fatigue vulnerable zone of this kind of bridge deck structure is obtained. Combined with the actual use of bridges, the fatigue life of typical welding details of bridge deck is calculated and evaluated based on the AASHTO Code of American Highway Bridge Design Code. The results show that, The calculated values of fatigue stress amplitudes of five types of fatigue vulnerable structures are smaller than the allowable values under the limit state of fatigue 鈪，

本文编号：1914970