Structural innovation design and mechanical performance of double-deck large-span steel truss arch bridges
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Le résumé fourni par la source
This article presents a comprehensive study on the structural design and mechanical performance of an innovative double-deck long-span steel truss arch bridge, exemplified by the Qingshuitang Bridge in Zhuzhou, China. The main bridge features a three-span continuous structural arrangement (100 + 408 + 100 m) with a dual-level deck system. The upper deck carries vehicular traffic, while the lower deck serves as a pedestrian and non-motorized vehicle pathway suspended by a novel three-directional hanger system. To address challenges such as structural vibration control and self-weight reduction, vertical hangers were designed to support gravity loads, whereas lateral and longitudinal inclined hangers were optimized to suppress transverse and longitudinal vibrations, respectively. Furthermore, an Ultra-High Performance Concrete (UHPC) lightweight composite deck was adopted in the main span to enhance structural efficiency and durability. Through detailed parametric studies and numerical simulations, key design parameters—including the edge-span circular curve radius (R = 494.348 m) and the inclination angles of the lateral (50°) and longitudinal (35°) hangers—were optimized to ensure geometric continuity, force equilibrium, and dynamic performance. The finite element analysis results demonstrate that the proposed structural system exhibits excellent mechanical behavior under various load combinations, including static, dynamic, wind, and temperature loads. All critical structural responses, such as stress distribution and deflection, comply with Chinese design codes, with safety factors exceeding 2.0. The findings validate the effectiveness of the innovative design strategies in achieving balanced stiffness, vibration mitigation, and overall stability.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Structural innovation design and mechanical performance of double-deck large-span steel truss arch bridges
- Date Crossref
- 17/10/2025
- Éditeur
- Informa UK Limited
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Jiaxing University pays non établi dans la noticeUniversité ou école supérieure
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Jiaxing Nanhu University pays non établi dans la noticeUniversité ou école supérieure
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Zhejiang University of Technology pays non établi dans la noticeUniversité ou école supérieure
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SGIDI Engineering Consulting (China) pays non établi dans la noticeEntreprise
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Jinan Municipal Engineering Design & Research Institute (China) pays non établi dans la noticeEntreprise
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Shanghai Municipal Engineering Design Institute (Group) Co. pays non établi dans la noticeEntreprise
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College of Information Engineering pays non établi dans la noticeUniversité ou école supérieure
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College of Civil Engineering pays non établi dans la noticeUniversité ou école supérieure
Jiaxing University, Jiaxing Nanhu University et Zhejiang University of Technology, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.