[1]刘君平,谢云鹏,熊世伟,等.UHPC蝶形腹板混凝土拱桥试设计[J].长安大学学报(自然科学版),2025,45(2):75-84.[doi:10.19721/j.cnki.1671-8879.2025.02.007]
　LIU Jun-ping,XIE Yun-peng,XIONG Shi-wei,et al.Trial design of concrete arch bridge with UHPC butterfly web[J].Journal of Chang’an University (Natural Science Edition),2025,45(2):75-84.[doi:10.19721/j.cnki.1671-8879.2025.02.007]
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UHPC蝶形腹板混凝土拱桥试设计()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年2期
页码:
75-84
栏目:
桥梁与隧道工程
出版日期:
2025-03-31

文章信息/Info

Title:
Trial design of concrete arch bridge with UHPC butterfly web
文章编号:
1671-8879(2025)02-0075-10
作者:
刘君平1; 谢云鹏1; 熊世伟2; 王道琳1; 陈宝春1
(1. 福州大学 土木工程学院,福建 福州 350108; 2. 江西省交通科学研究院有限公司,江西 南昌 330200)
Author(s):
LIU Jun-ping1;  XIE Yun-peng1;  XIONG Shi-wei2;  WANG Dao-lin1;  CHEN Bao-chun1
(1. College of Civil Engineering, Fuzhou University, Fuzhou 350108, Fujian, China; 2. Jiangxi Transportation Institute Co. Ltd., Nanchang 330200, Jiangxi, China)
关键词:
桥梁工程;  混凝土拱桥;  有限元;  试设计;  UHPC蝶形腹板;  斜拉悬臂施工
Keywords:
bridge engineering;  concrete arch bridge;  finite element;  trial design;  UHPC butterfly web;  cable-stayed cantilever construction
分类号:
U448.22
DOI:
10.19721/j.cnki.1671-8879.2025.02.007
文献标志码:
A
摘要:
结合混凝土拱圈腹板受力特点与超高性能混凝土(UHPC)材料性能特点,提出采用预制拼装UHPC蝶形腹板替代现浇混凝土腹板,形成新型UHPC蝶形腹板混凝土拱结构,以减轻自重和施工难度; 以跨径270 m的乌蒙山特大桥为原型,将原钢桁-混凝土组合拱圈的钢腹杆替换为UHPC蝶形腹板,进行UHPC蝶形腹板混凝土拱桥的试设计。研究结果表明:在施工过程中,试设计拱桥在最大悬臂和现浇完中箱顶、底板状态下的拱圈顶、底板混凝土和UHPC蝶形腹板应力在容许范围内,1阶弹性整体稳定系数分别为12.02和4.12,拱圈强度、整体强度-稳定和变形验算均满足规范要求; 相比钢桁-混凝土组合拱圈,UHPC增加质量与钢材减少质量相近,试设计拱圈自重仅增加5%,材料成本减少21%; 同时,试设计拱圈拱脚、拱顶截面的面外抗弯刚度分别提高25%和32%,各控制截面轴力增加3.8%～6.2%,由于拱轴系数的优化,拱脚和拱顶弯矩最大分别减小37.0%和22.5%; 相比于原桥,试设计拱桥的自振频率要大,但最大增幅仅8.5%,对拱桥动力特性的影响不大。研究成果对促进混凝土拱桥的技术进步具有较好的理论意义与实际应用价值。
Abstract:
Combined with the mechanical behaviors of concrete arch ring web and the material properties of ultra-high performance concrete(UHPC), the prefabricated assembly UHPC butterfly web was proposed to replace the cast-in-place concrete web. Subsequently, a new type of concrete arch structure with UHPC butterfly web was developed to reduce the self-weight and construction difficulties. The Wumengshan Bridge with a span of 270 m was taken as the prototype, the UHPC butterfly web was used to replace the steel truss web of the original steel truss-concrete composite arch ring, then a trial design was carried out for this new type of concrete arch bridge. The research results show that in the construction process, the stresses in the arch ring at the maximum cantilever stage and the completion of cast-in-place of the middle box top and bottom plates are within allowable limits, and the first-order elastic overall stability coefficients are 12.02 and4.12, respectively. The strength, overall strength-stability, and deformation verifications of the arch ring all meet the requirements of specifications. Compared with the steel truss-concrete composite arch ring, the weight increased by UHPC is similar to that reduced by steel, and the self-weight of the trial design arch ring only increases by 5%. However, the material cost reduces by 21%. Additionally, the out-of-plane bending stiffnesses of arch foot and vault sections in the trial design arch ring increase by 25% and 32%, respectively, and axial forces of critical sections only increase by 3.8%-6.2%. Due to the optimization on the arch axis coefficient, the bending moments of arch foot and vault sections reduce at most by 37.0% and 22.5%, respectively. Compared with the prototype bridge, the natural vibration frequency of the trial design arch bridge is larger with the maximum increment of only 8.5%, which has little effect on the dynamic characteristics of the arch bridge. In summary, the research results have good theoretical significance and practical application values for promoting the technical progress of concrete arch bridges.7 tabs, 11 figs, 28 refs.

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备注/Memo

备注/Memo:
收稿日期:2024-09-30
基金项目:国家自然科学基金项目(52078136)
作者简介:刘君平(1977-),男,江西安福人,研究员,工学博士,E-mail:liujunping@fzu.edu.cn。
更新日期/Last Update: 2025-04-01