基于断裂力学的钢拱桥剩余寿命评估  

Appraisal of Remaining Life of Steel Arch Bridge on Fracture Mechanics

作　　者：李小锋[1] 李奕方 李建新 

机构地区：[1]同济大学桥梁工程系,上海200092 [2]河南省建筑设计研究院有限公司,河南郑州450003

出　　处：《中国市政工程》2008年第5期24-26,共3页China Municipal Engineering

摘　　要：通过对一铆接钢拱桥剩余寿命评估的实例,论述了运用断裂力学理论分析钢拱桥疲劳寿命的方法与步骤。其主要步骤为:建立有限元模型,模拟其受力行为;根据交通荷载观测所得到的参数,用Monte-Carlo法建立交通荷载模型,并与有限元模型相结合,得到关心杆件的应力历程;最后运用断裂力学理论对该桥进行疲劳寿命分析。Based on the appraisal of the remaining life of a rivet connected steel arch bridge, a description is given of the method and steps to analyze the fatigue life of that bridge with the theory of fracture mechanics, which includes setting up a FEM to simulate its behavior under the force, using parameters from observation of traffic load and the Monte-Carlo method to set up a traffic load model and then incorporate it with the FEM to obtain the stress process of the relevant member, and finally using the theory of fracture mechanics to analyze the fatigue life of the bridge.

关 键 词：钢拱桥 断裂力学 剩余寿命 ANSYS 评估 

分 类 号：U448.36[建筑科学—桥梁与隧道工程]