Fatigue Performance of Orthotropic Steel Decks with Thickened Edge U-Ribs

被引：0
|
作者：
Zheng K. [1 ]
Heng J. [1 ]
He X. [2 ]
Zhang Y. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Zhejiang Provincial Institute of Communications Planning, Design and Research, Hangzhou
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2019年 / 54卷 / 04期
关键词：
Bridge engineering; Fatigue test; Orthotropic steel deck; Thickened edge U-rib; U-rib-to-deck joint;
D O I：
10.3969/j.issn.0258-2724.20170555
中图分类号：
学科分类号：
摘要：
The fatigue performance of rib-to-deck (RD) joints is expected to be enhanced by the application of the orthotropic steel deck (OSD) with thickened edge U-ribs (TEUs). To investigate its actual fatigue performance and the mechanism of enhancement, the RD joints in the OSD with TEUs using the fatigue test and numerical analysis was evaluated.Through the fatigue model test of full-scale specimens, comparative analysis was performed on the OSD with conventional U-ribs (CUs) and the OSD with TEUs, in the test, both the nominal stress and hot spot stress approaches were incorporated. A refined finite element (FE) model was established based on the test, and validated by the test data. Using the model, numerical analysis was carried out to study the mechanism of the enhancement in RD joints by the application of TEUs.The results show that: the use of TEUs improve the fatigue strength of rib-to-deck joints effectively; in the presence of negative welding errors, the specimens with TEUs are relatively insensitive to the variations in unpenetrated thicknessthat leading to the robustness of the fatigue strength of rib-to-deck joints. The fatigue performance of the OSD with TEUs has been further validated through its application in several engineering projects such as New Sanyuan bridge in Beijing and Fenghuangshan Viaduct in Chengdu. © 2019, Editorial Department of Journal of Southwest Jiaotong University. All right reserved.
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页码：694 / 700
页数：6
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