Fatigue Design of Steel Bridge Deck Asphalt Pavement Based on Nonlinear Damage Accumulation Theory

Xunqian Xu,Wenkang Shi,Yu Li,Chen Zhang,Wei Huang,Dakai Chen

doi:10.3390/app11125668

Xunqian Xu, Wenkang Shi + Show 4 more

Open Access

https://doi.org/10.3390/app11125668

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Journal: Applied sciences	Publication Date: Jun 18, 2021
Citations: 2	License type: CC BY 4.0

Affiliation: Nantong University, Southeast University

Abstract

Based on the nonlinear damage theory, this paper aims to explore the fatigue performance of steel bridge deck asphalt pavement under multistage fatigue load. Manson–Halford cumulative damage model and the modified model were introduced to describe loading sequence effects, and interactions between multiple loads were represented in stress ratio. The fatigue life prediction method of steel bridge deck asphalt pavement was put forward, considering loading sequence effects and load interactions. The fatigue design of steel bridge deck asphalt pavement was investigated with the fatigue life prediction model. The effects of different load levels and loading sequence on the fatigue design parameters stress ratio of steel bridge deck asphalt pavement were studied. The design results were compared with experimental results, and the prediction results were based on traditional Miner’s theory. The analysis results showed that the fatigue life prediction method based on the nonlinear cumulative damage theory can effectively design and analyze the fatigue characteristics of asphalt pavement of steel bridge deck with high accuracy and reliability. The fatigue life prediction model of steel bridge deck asphalt pavement can well reflect loading sequence effects and load interactions. In addition, the design model has relatively few parameters; therefore, it can be applied to practical engineering design.

Highlights

With the rapid development of highway construction worldwide, the continuous construction of expressways and long-span steel bridges has become a technical problem in highway construction
Asphalt mixture has excellent pavement performance, which has been widely used in the pavement engineering of high-grade highway and steel bridge decks, in which microcracks will appear after the action of load and gradually expand with the periodic action of the load because of rich micro defects, eventually leading to the damage of asphalt materials [1,2,3]
Based on the Manson–Halford model and the nonlinear damage accumulation theory, a new fatigue design model of steel bridge deck asphalt pavement structure under multistage load was established, which could effectively carry out structural fatigue design with certain accuracy

Summary

Introduction

With the rapid development of highway construction worldwide, the continuous construction of expressways and long-span steel bridges has become a technical problem in highway construction. Asphalt mixture has excellent pavement performance, which has been widely used in the pavement engineering of high-grade highway and steel bridge decks, in which microcracks will appear after the action of load and gradually expand with the periodic action of the load because of rich micro defects, eventually leading to the damage of asphalt materials [1,2,3]. Fatigue damage and cracking of asphalt mixtures have become major diseases affecting service functions of bridges [4]. The deck pavements of some expressways have been damaged, especially in super-large bridges, which are important traffic hubs in the traffic network. The study on fatigue damage characteristics of steel bridge deck pavement system has a certain theoretical value and engineering significance [7,8,9]

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