Stress Analyses and Fatigue Evaluation of Rib-to-Deck Joints Based on the Fracture Mechanics in Orthotropic Steel Decks

Authors

Civil Engineering Department, Faculty of Engineering, Razi University

Abstract

     In this study, a three-dimensional finite element model of a partial orthotropic steel deck was created by ABAQUS software [1], and fatigue design load was simulated according to the AASHTO LRFD Bridge Design Specification [2]. The stress in points susceptible to fatigue cracks of rib-to-deck joint is investigated in five different cross-sections in model’s middle span and most sensitive region of fatigue cracks was identified. Then, the most sensitive region of fatigue cracks cross-section was simulated with a two-dimensional sub-model by compact meshing and domains of stress intensity factor were calculated with various depths of crack in point susceptible to fatigue crack by the numerical method, finally according to stress results and using the linear elastic fracture mechanics (LEFM) method Fatigue evaluation, including simulation of cracking growth, estimation of loading period and connection fatigue resistance, was done.

Keywords

References

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Journal of Civil and Environmental Engineering
Volume 46.1, Issue 82 - Serial Number 82
Spring 2016
June 2016
Pages 37-48

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