曲线钢箱梁桥面板力学行为及构造优化研究

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Abstract Research purposes: It is extremely complex for the details in the orthotropic deck of the steel curved box beam with small radius, with the complicated mechanic behavior under the bending and torsion. In order to investigate the mechanical performance of orthotropic deck of the steel curved box beam with small radius, and provide the optimized details for this type of bridge deck, this paper conducted a detailed study in the mechanical performance of this kind of orthotropic deck subjected to the wheel load with the numerical analysis. In addition, the multi-objective optimization in the steel bridge deck was launched using orthogonal test, as well as developing software for the optimization of the orthotropic deck of the steel curved box beam with IntelliJ IDEA.
Research conclusions: (1) The largest bending moment section in side span is the most critical for the main stresses in the most key details, with the obvious large stress in the detail 3 (the welding hole arc in diaphragms). Besides, as the wheel load on the raised side, the stresses of orthotropic deck are larger than those, as the load in the middle. (2) The main stresses in the critical details are almost identical as the wheel load on and between the ribs, yet the stresses are great different as the load on or between the diaphragms and each critical load position for these details are obtained. (3) For the curved steel box beam, the new steel-concrete composite bridge deck, with muti-objective optimization details, has much better mechanical performance than the steel orthotropic deck. (4) The research results can provide the optimization for the design and maintenance for the orthotropic deck on the steel curved box beam.

Key words： bridge engineering local stress muti-objective optimization steel orthotropic deck steel curved box beam

Received: 17 August 2022

PACS:

U448

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	Articles by authors
	ZHENG Xiaobo
	JIANG Kunkun
	HOU Wei
	ZHOU Yongjun
	SHEN Chuandong

Cite this article:

ZHENG Xiaobo,JIANG Kunkun,HOU Wei, et al. Research on the Mechanic Behavior and Detail Optimization for Deck of Steel Curved Box Beam[J]. Journal of Railway Engineering Society, 2024, 41(5): 19-27.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2024/V41/I5/19

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