提速对既有桥梁的疲劳影响沪杭线 41￣# 桥测试资料分析  

Fatigue Analysis of Bridge No.41 in Shanghai Hangzhou Railway Based on Site Experimental Data

作　　者：罗蔚文[1] 

机构地区：[1]上海铁道大学

出　　处：《铁道学报》1998年第6期122-125,共4页Journal of the China Railway Society

基　　金：铁道部科技研究开发计划项目

摘　　要：提供沪杭线４１＃桥纵、横梁连接角钢实测一昼夜的应力谱，并给出１９５３～１９９１年间运量资料。文章运用了疲劳累积损伤的方法，采用三个国家的疲劳规范检算公式，对连接进行疲劳检算。分析结果其连接角钢存在较大的疲劳破坏风险，不能通过疲劳检算。因此，在全国主要干线面临提速的情况下，要继续使用这类桥梁，必须慎重。In the paper, the stress spectrum of the steel angles connecting the longitudinal and the transverse girders recorded within 24 hours is given together with the information of transportation in the period between 1953 and 1991. The connecting joints were examined against fatigue with the theory of fatigue accumulation and with the formula of the fatigue specification of three different countries. It is shown from the analysis that the steel angle connectors fail to satisfy the fatigue criteria. Therefore, essential strengthenning should be detailed on the existing railway steel bridge before velocity upgrade is applied.

关 键 词：连接角钢 疲劳 应力谱 累积损伤 铁路桥 

分 类 号：U448.131.4[建筑科学—桥梁与隧道工程]