|Table of Contents|

Fatigue performance of steel-PPUC composite orthotropic steel bridge deck(PDF)

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

Issue:
2024年05期
Page:
131-141
Research Field:
桥隧工程
Publishing date:

Info

Title:
Fatigue performance of steel-PPUC composite orthotropic steel bridge deck
Author(s):
WANG Zuocai1; 2;  ZHAO Xi1;  WANG Junyi3;  WANG Donghui4
(1. College of Civil Engineering, Hefei University of Technology, Hefei 230009, Anhui, China; 2. Anhui Engineering Research Center for Civil Engineering Disaster Prevention and Mitigation, Hefei University of Technology, Hefei 230009, Anhui, China; 3. Ningbo Road Technology Industrial Group Co., Ltd, Ningbo 315800, Zhejiang, China; 4. China Railway Major Bridge Reconnaissance & Design Institute Co., Ltd., Wuhan 430056, Hubei, China)
Keywords:
polyester polyurethane concrete;  fatigue performance;  hot spot stress method;  orthotropic steel bridge deck;  fatigue strength evaluation
PACS:
TU391
DOI:
10.19815/j.jace.2023.01022
Abstract:
In order to effectively solve the diseases of traditional steel bridge deck, the steel-polyester polyurethane concrete(steel-PPUC)composite bridge deck was proposed, and the fatigue performance of the orthotropic steel bridge deck was studied. The local finite element model was established based on Ma'anshan dual-purpose highway and railway bridge. The hot spot stress method was used to obtain the stress response of the steel bridge deck which was prone to fatigue cracking under the wheel load. The fatigue strength was evaluated based on the fatigue stress amplitude. The influence of PPUC pavement on the fatigue performance of orthotropic steel bridge deck was considered under the conditions of different temperatures, different pavement thicknesses and different structural forms. The results show that the PPUC pavement with high elastic modulus can significantly improve the stress of typical fatigue details of orthotropic steel bridge deck. The stress amplitude of the fatigue details at the connection between the top plate and the longitudinal rib is the largest. The details of the bridge deck at the connection between the top plate and the longitudinal rib, the longitudinal rib at the connection between the longitudinal rib and the diaphragm, and the butt weld of the longitudinal rib all meet the requirements of anti-fatigue cracking. The influence of elastic modulus change caused by different temperatures on the equivalent stress amplitude of typical fatigue details is nonlinear, and the influence of pavement thickness changes on the equivalent stress amplitude of typical fatigue details is linear. In order to meet the requirement of the mechanical performance of orthotropic steel bridge deck and the driving comfort, single-layer and double-layer composite PPUC structures are proposed. The maximum reduction of the stress amplitude of each fatigue detail of the two structures is calculated to be 21%-56%, and the minimum reduction is 8%-36%, which provides a theoretical basis for the anti-fatigue design of steel-PPUC composite bridge deck.

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Last Update: 2024-09-30