中文核心期刊
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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2025, Vol. 44 ›› Issue (10): 115-122.DOI: 10.3969/j.issn.1674-0696.2025.10.15

• 桥梁与隧道工程 • 上一篇    

钢桁-UHPC组合拱桥试设计研究

许健1，王道琳2，刘君平3，谢云鹏3，彭元诚1   

  1. (1. 中交第二公路勘察设计研究院有限公司，湖北 武汉 430056；2.山东东营市交通运输局，山东 东营 257000； 3. 福州大学 土木工程学院，福建 福州 350108)
  • 收稿日期:2024-11-16 修回日期:2025-02-25 发布日期:2025-11-06
  • 作者简介:许健(1989—)，男，湖南衡阳人，高级工程师，硕士，主要从事大跨径桥梁设计方面的研究。E-mail：824340744@qq.com 通信作者：刘君平(1977—)，男，江西安福人，研究员，博士，主要从事桥梁工程方面的研究。E-mail：liujunping@fzu.edu.cn

Trial Design of Steel Truss-UHPC Composite Arch Bridge

XU Jian1, WANG Daolin2, LIU Junping3, XIE Yunpeng3, PENG Yuancheng1   

  1. (1. CCCC Second Highway Consultants Co., Ltd., Wuhan 430056, Hubei, China; 2. Dongying Municipal Transportation Bureau, Dongying 257000, Shandong, China; 3. College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China)
  • Received:2024-11-16 Revised:2025-02-25 Published:2025-11-06

摘要： 钢桁-混凝土组合拱桥是由混凝土顶底板和钢桁腹杆组成的新型拱结构，能大幅减轻混凝土拱桥的自重，降低施工难度。结合UHPC材料的发展，提出采用UHPC替代普通混凝土，形成钢桁-UHPC组合拱的构思，依托乌蒙山大桥，进行这种新型组合拱桥的试设计研究。结果表明：在保持与原拱圈截面尺寸基本相同下，采用钢横撑替代中箱顶底板UHPC，在施工阶段和成桥阶段，UHPC顶底板、内置型钢及钢腹杆的应力均小于其强度设计值，最大悬臂、裸拱及成桥关键施工阶段的稳定系数均大于4.0，试设计拱圈强度、稳定性和变形验算均满足规范要求。相比于钢桁-混凝土组合拱圈，钢桁-UHPC组合拱的钢材用量减少16%，自重减小49.9%，拱圈节段最大吊装重量减小39%；各控制截面的轴力减小幅度约18.6%~22.0%，拱脚、拱顶截面弯矩分别降低约20%和60%；截面的抗压和抗弯刚度减小，稳定性降低，动力特性差异较小。

关键词: 桥梁工程；组合拱；钢桁腹杆；UHPC；试设计

Abstract: Steel truss-concrete composite arch is a new type of arch structure composed of concrete top and bottom slabs and steel truss webs, which can greatly reduce the dead weight of concrete arch bridge and the construction difficulty. Combined with the development of UHPC material, the UHPC was proposed to replace the conventional concrete, forming a steel truss-UHPC composite arch. Based on the Wumengshan Bridge, the trial design of this new composite arch bridge was carried out. The results show that: when basically maintaining the same cross-section dimensions as those in the original arch ring, steel cross braces are used to replace the UHPC top and bottom slabs of the middle box. The stresses in the UHPC top and bottom slabs, the embedded steel chords and the steel truss webs are all less than their strength design values in the construction stage and the bridge completion stage. The stability coefficients for the maximal cantilever, bare arch and the completed bridge are all greater than 4.0. The trial design of the arch ring meets all requirements of the specifications in terms of strength, stability and deflection calculation. Compared with the steel truss-concrete composite arch ring, the steel consumption amount of the steel truss-UHPC composite arch is reduced by 16%, the self-weight is reduced by 49.9%, and the maximum lifting weight of the arch ring segment is reduced by 39%. The axial force reduction at critical section is approximately from 18.6% to 22.0%, and the bending moments of the arch foot and the crown section are reduced by about 20% and 60%, respectively. The compressive and flexural stiffness of the section decrease, the stability is reduced, and the difference in dynamic characteristics is relatively small.

Key words: bridge engineering; composite arch; steel truss web; UHPC; trial design

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