Vehicle-induced fatigue damage prognosis of orthotropic steel decks of cable-stayed bridges

Chuang Cui, You Lin Xu, Qing Hua Zhang, Feng Yang Wang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

Orthotropic steel deck (OSD) in a long-span cable-stayed bridge is vulnerable to fatigue damage at the deck-to-rib (DTR) joints due to excessive vehicle-induced dynamic stresses. A framework for fatigue damage prognosis of OSD in long-span cable-stayed bridges is thus presented in this paper. The main features of the framework include hourly traffic loading simulation and prediction, multi-scale finite element bridge model, coupled vehicle-bridge system, mesh-insensitive equivalent stress responses at a DTR joint, response surface models for equivalent stress responses, OSD and pavement interaction, asphalt pavement temperature effect, fatigue test-generated S-N curve, and fatigue damage prognosis. To evaluate the feasibility of the proposed framework and to manifest the effects of pavement roughness, asphalt temperature, and vehicle transverse locations on fatigue damage accumulation, a real long span cable-stayed bridge is investigated as a case study. The results indicate that the developed framework is applicable and that the fatigue damage of a DTR joint is underestimated if the time-variant temperature of asphalt pavement and road surface condition are not considered but the fatigue damage is overestimated without consideration of variable transverse locations of vehicles.

Original languageEnglish
Article number110509
JournalEngineering Structures
Volume212
DOIs
Publication statusPublished - 1 Jun 2020

Keywords

  • Cable-stayed bridge
  • Fatigue damage prognosis
  • Multi-scale model
  • Orthotropic steel deck
  • Pavement and deck interaction
  • Stochastic traffic flow
  • Stress response surface
  • Vehicle-bridge coupled system

ASJC Scopus subject areas

  • Civil and Structural Engineering

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