Effect of High Amplitude Loading on Fatigue Life Prediction of Steel Bridges

被引：7

作者：

Karunananda, K. ^{[1
]}

Ohga, M. ^{[1
]}

Dissanayake, P. B. R. ^{[2
]}

Siriwardane, S. ^{[3
]}

机构：

[1] Ehime Univ, Dept Civil & Environm Engn, Matsuyama, Ehime 790, Japan

[2] Univ Peradeniya, Dept Civil Engn, Peradeniya, Sri Lanka

[3] Univ Ruhuna, Dept Civil Engn, Ruhuna, Sri Lanka

来源：

PROCEEDINGS OF THE TWELFTH EAST ASIA-PACIFIC CONFERENCE ON STRUCTURAL ENGINEERING AND CONSTRUCTION (EASEC12) | 2011年 / 14卷

关键词：

High cycle fatigue; low cycle fatigue; steel bridges; life prediction; high amplitude loading;

D O I：

10.1016/j.proeng.2011.07.065

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents a new fatigue model to predict life of steel bridges considering the effect of high amplitude loading. It consists of a modified strain-life curve and a new strain based damage index. Modified strain-life curve consists of Coffin-Manson relation in low cycle fatigue region and a new strain-life curve in high cycle fatigue region. The damage variable is based on a modified von Mises equivalent strain to account for the effects of loading nonproportionality and strain path orientation in multiaxial stress state. The proposed model was verified with experimental test results of two materials available on the literature. Then, it was illustrated with an old riveted wrought iron railway bridge. The obtained results verify the effectiveness of the proposed model over commonly used Miner's rule based life prediction of steel bridges. (C) 2011 Published by Elsevier Ltd.

引用

页数：8

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