RESEARCH ON PROPAGATION CHARACTERISTICS OF FATIGUE CRACK FOR STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDINAL RIBS

MA Guomin; JIN Xiunan; LI Wuxiong; ZHAO Yiwei

doi:10.13204/j.gyjzG21031202

Volume 51 Issue 11

Mar. 2022

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MA Guomin, JIN Xiunan, LI Wuxiong, ZHAO Yiwei. RESEARCH ON PROPAGATION CHARACTERISTICS OF FATIGUE CRACK FOR STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDINAL RIBS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 100-105. doi: 10.13204/j.gyjzG21031202

Citation:

MA Guomin, JIN Xiunan, LI Wuxiong, ZHAO Yiwei. RESEARCH ON PROPAGATION CHARACTERISTICS OF FATIGUE CRACK FOR STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDINAL RIBS[J]. INDUSTRIAL CONSTRUCTION, 2021, 51(11): 100-105. doi: 10.13204/j.gyjzG21031202

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RESEARCH ON PROPAGATION CHARACTERISTICS OF FATIGUE CRACK FOR STEEL BRIDGE DECKS WITH OPEN-SHAPED LONGITUDINAL RIBS

doi: 10.13204/j.gyjzG21031202

1. Yunnan Chuda Expressway Investment and Development Co., Ltd., Dali 671099, China;
2. CCCC Highway Consultants Co., Ltd., Beijing 100088, China

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

Abstract

Abstract

In order to research propagation characteristics of fatigue crack for steel bridge decks 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 crack propagation characteristics and optimal design of steel bridge decks with open-shaped longitndinal ribs were systematically studied. The results indicated that the four typical fatigue cracking modes all increased with the increase of crack depth, in the early stage of fatigue crack propagation. When the crack depth reached 4 mm, the fatigue crack growth rates of cracking modes C1, C2 and C3 reached their peaks, and the crack growth rate of the cracking mode C4 increased continuously with the increase of the crack depth throughout the process. The fatigue life of the steel bridge deck with open-shaped longitudinal ribs was controlled by the cracking mode C1 and C4. Increasing the thickness of the deck and laying a concrete cast-in-situ layer could significantly reduce the equivalent stress intensity factor amplitude of the steel bridge deck, but the laying of the cast-in-situ concrete layer had a more significant impact on the fatigue performance of the steel bridge deck. It was recommended to improve the fatigue performance of steel bridge decks by laying cast-in-situ concrete layers.
- orthotropic steel bridge deck,
- finite element method,
- fatigue performance,
- fracture mechanics,
- crack propagation characteristics

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References(17)

References

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