Fatigue Performance of Orthotropic Steel Decks in Super-Wide Steel Box Girder Considering Transverse Distribution of Vehicle Load

Q2 Engineering

SDHM Structural Durability and Health Monitoring Pub Date : 2021-01-01 DOI:10.32604/sdhm.2021.017526

Xudong Wang, C. Miao, Mao Yang, You-liang Ding

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引用次数: 3

Abstract

This study presents an investigation on the fatigue analysis of four types of details on orthotropic steel decks (OSDs) for a cable-stayed super-wide steel box girder bridge based on finite-element analysis (FEA) with vehicle transverse distribution model (VTDM). A high-fidelity 3D FE model verified by the static load test is established to satisfy the fatigue analysis accuracy. The stress behavior of super-wide steel box girders under the vehicle load at different lane locations is investigated. Then, considering the effect of VTDM, the fatigue life analysis of four typical details is performed using the Miner cumulative damage rule. The results show that the vehicle transverse location has a great influence on the stress behavior of details with sharp influence surface, and the stress ranges in the outermost lane are larger than those in other lanes, indicating that the details of OSD in the outermost lane are prone to fatigue. The fatigue life analysis indicates that the diaphragm cutout is more prone to fatigue than other details, which should be carefully treated in bridge maintenance.

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考虑车辆荷载横向分布的超宽钢箱梁正交各向异性钢桥面疲劳性能

基于车辆横向分布模型(VTDM)的有限元分析方法，对某斜拉超宽钢箱梁桥正交各向异性钢桥面(OSDs)的四种结构细节进行了疲劳分析。通过静载试验，建立了满足疲劳分析精度的高保真三维有限元模型。研究了不同车道位置超宽箱梁在车辆荷载作用下的受力特性。然后，考虑VTDM的影响，采用Miner累积损伤规则对四个典型细部进行了疲劳寿命分析。结果表明:车辆横向位置对影响面尖锐的细节应力行为影响较大，且最外侧车道的应力范围大于其他车道，表明最外侧车道OSD细节容易发生疲劳;疲劳寿命分析表明，隔膜开孔是桥梁维修中最容易出现疲劳的部位，应慎重对待。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

SDHM Structural Durability and Health Monitoring Engineering-Building and Construction

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： In order to maintain a reasonable cost for large scale structures such as airframes, offshore structures, nuclear plants etc., it is generally accepted that improved methods for structural integrity and durability assessment are required. Structural Health Monitoring (SHM) had emerged as an active area of research for fatigue life and damage accumulation prognostics. This is important for design and maintains of new and ageing structures.