RESEARCH ON FATIGUE PERFORMANCES OF STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDIRAL RIBS

GUO Kai; ZHANG Xiaoliang; ZHOU Yu; XIA Qing

doi:10.13204/j.gyjzG21031203

Volume 51 Issue 11

Mar. 2022

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GUO Kai, ZHANG Xiaoliang, ZHOU Yu, XIA Qing. RESEARCH ON FATIGUE PERFORMANCES OF STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDIRAL RIBS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 106-111,120. doi: 10.13204/j.gyjzG21031203

Citation:

GUO Kai, ZHANG Xiaoliang, ZHOU Yu, XIA Qing. RESEARCH ON FATIGUE PERFORMANCES OF STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDIRAL RIBS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 106-111,120. doi: 10.13204/j.gyjzG21031203

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RESEARCH ON FATIGUE PERFORMANCES OF STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDIRAL RIBS

doi: 10.13204/j.gyjzG21031203

1. Yunnan Chuda Expressway Investment and Development Co., Ltd., Dali 671099, China;
2. Department of Transportation of Yunnan Province, Kunming 650031, China

Received Date: 2021-03-12
Available Online: 2022-03-29

Abstract

Abstract

In order to research the fatigue performance of steel bridge deck with open-shaped longitudinal ribs, the rib-to-deck welded joint and rib-to-diaphragm welded joint were considered as research objects, based on the Yunnan Chuda Expressway project, the fatigue performance and key influencing factors of steel bridge decks with open-shaped longitudinal ribs were systematically studied. The results indicated that the length of the longitudinal influence line of rib-to-deck welded joint was mainly between the two adjacent diaphragms of the structural details. The length of the longitudinal influence line of rib-to-diaphragm welded joint was mainly within the two adjacent spans of the structural details. The hot-spot stress amplitude of the deck toe cracking mode(C1) was the largest under the longitudinal moving load, which was 125.8 MPa. After laying an 8 cm thick cast-in-situ concrete layer, the hot-spot stress amplitude of the deck toe cracking mode was reduced to 10.7 MPa, a reduction of 91.5%. The change of the rib height had no significant effect on the stress amplitude of each fatigue cracking mode of the steel bridge decks with open-shaped longitudinal ribs. Increasing the rib spacing would significantly increase the stress amplitude of the diaphragm toe cracking mode(C4). The stress amplitude of each cracking mode of the steel bridge deck with open-shaped longitudinal ribs and cast-in-situ concrete layer was at a low level, the risk of fatigue cracking was small.
- open-shaped longitudinal rib,
- steel bridge decks,
- finite element,
- fatigue performance,
- cast-in-situ concrete layer

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References(14)

References

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