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

ZHENG Kaifeng; HENG Junlin; HE Xiaojun; ZHANG Yu

doi:10.3969/j.issn.0258-2724.20170555

Volume 54 Issue 4

Jul. 2019

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Journal of Southwest Jiaotong University > 2019 > 54(4): 694-700.

ZHENG Kaifeng, HENG Junlin, HE Xiaojun, ZHANG Yu. Fatigue Performance of Orthotropic Steel Decks with Thickened Edge U-Ribs[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 694-700. doi: 10.3969/j.issn.0258-2724.20170555

Citation:

ZHENG Kaifeng, HENG Junlin, HE Xiaojun, ZHANG Yu. Fatigue Performance of Orthotropic Steel Decks with Thickened Edge U-Ribs[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 694-700. doi: 10.3969/j.issn.0258-2724.20170555

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

doi: 10.3969/j.issn.0258-2724.20170555

Received Date: 18 Jul 2017
Rev Recd Date: 20 Mar 2018

Available Online: 12 Jun 2019

Publish Date: 01 Aug 2019

Abstract

Abstract

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.
- bridge engineering,
- orthotropic steel deck,
- fatigue test,
- thickened edge U-rib,
- U-rib-to-deck joint

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References

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