Fatigue Performance of Steel–UHPC Composite Bridge Deck System with Large Longitudinal Rib

Author:

Zhou Yi123ORCID,Wei Chuan4ORCID,Liang Guoxi5ORCID,Zhou Dequan2

Affiliation:

1. Key Laboratory of Road Structure and Material of Ministry of Transport (Changsha), Changsha University of Science & Technology, Changsha, Hunan 410114, China

2. School of Civil Engineering, Changsha University of Science & Technology, Changsha, Hunan 410114, China

3. Hunan Communication & Water Conservancy Group Ltd., Changsha, Hunan 410008, China

4. Department of Bridge Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China

5. Poly Changda Engineering Co.Ltd., Guangzhou, Guangdong 510620, China

Abstract

A critical problem in the development and application of orthotropic steel bridge decks (OSDs) is fatigue cracking, which is determined by the deck’s structural system, mechanical characteristics, load, and external environmental factors. The development of bridge deck systems with high fatigue resistance is increasingly gaining interest in the field of bridge deck design. An effective method for improving the fatigue life of OSDs is the introduction of an ultra high performance concrete (UHPC) layer to enhance OSD’s stiffness. In this study, two types of experiments were performed to investigate the transverse and longitudinal fatigue behaviors of a steel–UHPC composite bridge deck with large longitudinal ribs. The experiments show that the application of a 70-mm-thick UHPC layer effectively reduces the stress intensity at key fatigue details in OSDs. The influence of the UHPC layer on the OSD fatigue performance was evaluated by experiments and finite element analysis. After the formation of microcracks on the UHPC surface layer, the composite bridge deck system continued to exhibit adequate fatigue performance. Moreover, the effects of damage accumulation on the UHPC layer and studs in transverse specimens were evaluated.

Funder

Ministry of Transport of the People's Republic of China

Publisher

Hindawi Limited

Subject

General Engineering,General Materials Science

Reference33 articles.

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2. Overview fatigue phenomenon in orthotropic bridge decks in The Netherlands;F. BP. de Jong,2004

3. Strain Energy-Based Fatigue Life Evaluation of Deck-to-Rib Welded Joints in OSD Considering Combined Effects of Stochastic Traffic Load and Welded Residual Stress

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