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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） ›› 2023, Vol. 42 ›› Issue (6): 18-23.DOI: 10.3969/j.issn.1674-0696.2023.06.03

• 交通+大数据人工智能 • 上一篇    下一篇

钢管拱切线拼装坐标修正在ANSYS中的实现方法

周水兴1，周琳淇1,2，刘增武1   

  1. （1. 重庆交通大学 土木工程学院，重庆 400074；2.重庆建筑工程职业学院 建设管理学院，重庆 400039）
  • 收稿日期:2021-03-04 修回日期:2023-04-15 出版日期:2023-07-07 发布日期:2023-08-01
  • 作者简介:周水兴（1967—），男，浙江嘉兴人，教授，博士，主要从事大跨度桥梁设计理论与工程控制技术方面的研究。E-mail：zhoushuixing@126.com 通信作者：周琳淇（1992—），男，江苏扬州人，讲师，硕士，主要充实大跨度桥梁施工控制方面的研究。E-mail：394495782@qq.com
  • 基金资助:
    重庆市教委重点项目（KJZD-K201900705）；重庆市自然科学基金面上项目（CSTB2022NSCQ-MSX0661）

Implement Method of Coordinate Correction of Tangent Assembly of Steel Tubular Arch in ANSYS

ZHOU Shuixing1, ZHOU Linqi1, 2, LIU Zengwu1   

  1. （1. College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 2. College of Construction Management, Chongqing Jianzhu College, Chongqing 400039, China）
  • Received:2021-03-04 Revised:2023-04-15 Online:2023-07-07 Published:2023-08-01

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摘要： 钢管混凝土拱桥钢管拱肋多采用分段安装，可采用ANSYS的生死单元进行过程分析，受到未激活单元虚位移影响，节段单元在ANSYS程序中并非在切线位置上激活。针对桁式断面的钢管混凝土拱桥，提出用悬臂端节点位移平均值作为拱肋整个截面的位移来修正激活前的单元坐标，使其处在前一节段的切线位置上；给出了坐标修正的计算公式，编制了钢管拱安装计算命令流，用于一座320 m跨钢管混凝土拱桥施工中。结果表明：在实现扣索一次张拉的前提下，实测扣索力与理论索力的误差在3%以内，上、下游拱肋高程差控制在5 mm内，成拱后的拱肋线形与裸拱自重线形吻合良好。

关键词: 桥梁工程, 钢管混凝土拱桥, 虚位移, 切线拼装, 坐标修正, 桁式断面

Abstract: The arch rib of concrete-filled steel tubular arch bridge is mostly installed by segment and segment, and the birth and death element of ANSYS can be used for process analysis. Affected by the virtual displacement of the inactive elements, the segment elements were not activated at the tangent position in ANSYS program. Aiming at the concrete-filled steel tubular arch bridge with truss section, the average displacement of cantilever end node was proposed to be the displacement of the whole section of arch rib to modify the element coordinate before activation, so that it was in the tangent installation position of the previous segment. The calculation formula for coordinate correction was put forward, and the calculation command flow for steel pipe arch installation was compiled, which was used in the construction of concrete-filled steel tubular arch bridge with a span of 320 m. The results show that on the premise of achieving one-time tension of the buckle cable, the error between the measured buckle cable force and the theoretical cable force is within 3%, and the elevation difference between the upstream and downstream arch ribs is controlled within 5 mm. The arch rib shape after arch formation is in good agreement with the self-weight shape of the bare arch.

Key words: bridge engineering, concrete-filled steel tubular arch bridge, virtual displacement, tangent assembly, coordinate correction, truss section

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