|Table of Contents|

Corrosion fatigue damage mechanism of steel wire of in-service concrete-filled steel tubular arch bridge boom(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2024年06期
Page:
111-120
Research Field:
桥隧工程
Publishing date:

Info

Title:
Corrosion fatigue damage mechanism of steel wire of in-service concrete-filled steel tubular arch bridge boom
Author(s):
LIU Jiawei1;  YAO Guowen1; 2;  WANG Wei3;  ZHANG Gaofeng1;  WU Shuhang1
(1. School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 3. Wanzhou City Management Bureau of Chongqing, Chongqing 404199, China)
Keywords:
arch bridge boom;  corrosion of steel wire;  fatigue life;  Weibull distribution;  damage mechanism
PACS:
TU375
DOI:
10.19815/j.jace.2022.11086
Abstract:
In order to assess the remaining fatigue life of the steel wire of in-service concrete-filled steel tubular arch bridge boom, the high-strength steel wire inside the replaced boom of an arch bridge that was in service for 20 years, was taken as the research object, and the steel wire was subjected to accelerated corrosion for different time to obtain steel wire specimens with different degrees of corrosion. The surface roughness, mass loss rate, fracture mechanism, and fatigue life of the steel wire under different degrees of corrosion were obtained through surface inspection, weighing, fatigue testing, and fracture morphology analysis. The fatigue life data were analyzed by using the Weibull model, and the remaining fatigue life formula of the boom steel wire under different failure probabilities was obtained. The results show that as the degree of corrosion increases, the surface roughness and quality loss rate of the boom steel wire continuously increase, the fatigue life decreases, and the fatigue fracture surface is brittle failure. The fatigue life of the polished steel wire is improved. Under the same failure probability, the remaining fatigue life of the boom steel wire will decrease with the increase of stress ratio or corrosion degree. The research results can provide reference for the service status and fatigue life prediction of boom steel wire.

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Last Update: 2024-12-10