Fatigue evaluation of highway bridges

被引：10
|
作者：
Tsiatas, G [1 ]
Palmquist, SM [1 ]
机构：
[1] Univ Rhode Isl, Dept Civil Engn, Kingston, RI 02881 USA
来源：
PROBABILISTIC ENGINEERING MECHANICS | 1999年 / 14卷 / 1-2期
关键词：
fatigue life prediction; bridge fatigue; remaining safe fatigue life;
D O I：
10.1016/S0266-8920(98)00030-7
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The present work provides a comparison of current AASHTO bridge fatigue guidelines with fracture mechanics procedures. Specifically, the remaining fatigue life of several actual bridges with welded cover plate ends is estimated using the AASHTO specifications. The estimates are compared with predictions made using linear elastic fracture mechanics principles where the time required for an initial flaw to propagate to a critical depth is calculated. It is found that fatigue Lives of actual steel highway bridges as determined using fracture mechanics far exceed the remaining safe fatigue life predictions made with current AASHTO guide specifications. For the case of redundant bridges, an adjustment factor is introduced which, at various probability levels, can produce closer estimates of bridge fatigue lives between the AASHTO specifications and fracture mechanics. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：189 / 194
页数：6
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