大跨度系杆拱桥拱梁墩交汇段模型试验研究*

王朝

铁道工程学报 ›› 2023, Vol. 40 ›› Issue (3) : 39-44.

PDF(1084 KB)
PDF(1084 KB)
铁道工程学报 ›› 2023, Vol. 40 ›› Issue (3) : 39-44.
长大干线: 桥梁工程

大跨度系杆拱桥拱梁墩交汇段模型试验研究*

  • 王朝**
作者信息 +

Research on the Model Tests of Intersection Section of Arch, Beam and Pier of Large-span Tied Arch Bridge

  • WANG Chao
Author information +
文章历史 +

摘要

研究目的: 宜宾金沙江公铁两用大桥是成贵线重要控制性工程之一,为公铁两用双层刚架系杆拱桥。本文的研究对象为该桥主拱、立柱、下横梁及桥墩的交汇区域,该交汇段具有受力荷载多、荷载大、受力方向各异等特点,且存在明显的应力集中区域。通过模型试验测试结果与有限元对比分析,对结构的安全性进行评估,并对设计建造提出合理化建议。
研究结论: (1)对交汇段进行了细部有限元分析,并设计制作了1 ∶6的缩尺模型,测试模型在最不利荷载工况下的应力分布与结构变形等受力特性,以及在超载工况下的承载能力,结果表明结构设计合理,具备一定的安全储备;(2)建议在交汇段受拉区增设抗裂钢筋、加强钢混结合面下的混凝土振捣、严格控制钢拱肋与混凝土拱座间锚杆张拉力等措施来提高施工建造质量;(3)本研究结果可为同类型系杆拱桥的施工建造提供借鉴与参考。

Abstract

Research purposes: Yibin Jinsha River highway-railway dual-purpose bridge is one of the important control projects of Chengdu-Guiyang line, as a highway-railway double-deck rigid frame tied arch bridge. The study object of this paper is the intersection region of the main arch, column, beam and pier of the bridge, the intersection section has the characteristics of many loads, large loads, different stress directions, and there are obvious stress concentration region. Through the comparative analysis of model test results and finite element analysis, the safety of the structure is evaluated, and reasonable suggestions for the design and construction are put forward, which provides reference for the design and construction of this kind of bridge.
Research conclusions: (1) The detailed finite element analysis of the intersection section is carried out, and a 1 ∶6 scale model is designed and made to test the stress distribution, structural deformation and other stress characteristics of the model under the most unfavorable load conditions, as well as the bearing capacity under overload conditions. The results show that the structural design is reasonable and has a certain safety reserve. (2) It is suggested to add crack resistant reinforcement in the tensile area of the intersection section, strengthen the concrete vibration under the steel-concrete joint surface, and strictly control the bolt tension between the steel arch rib and the concrete arch seat to improve the construction quality. (3) The research results can provide reference for the construction of tied arch bridges of the same type.

关键词

系杆拱桥 / 交汇段 / 有限元 / 应力集中 / 模型试验

Key words

tied arch bridge / intersection / finite element / stress concentration / model test

引用本文

导出引用
王朝. 大跨度系杆拱桥拱梁墩交汇段模型试验研究*[J]. 铁道工程学报, 2023, 40(3): 39-44
WANG Chao. Research on the Model Tests of Intersection Section of Arch, Beam and Pier of Large-span Tied Arch Bridge[J]. Journal of Railway Engineering Society, 2023, 40(3): 39-44
中图分类号: U24   

参考文献

[1] 张双洋,赵人达,贾毅,等.大跨度高速铁路劲性骨架混凝土拱桥模型试验研究[J].西南交通大学学报,2017(12):1088-1096.
Zhang Shuangyang,Zhao Renda,Jia Yi,etc. Model Test Study on Long-Span Railway Concrete Arch Bridge with Rigid Skeleton[J]. Journal of Southwest Jiaotong University,2017(12):1088-1096.
[2] 易伦雄,张晔芝,徐树蕾,等.客运专线刚架系杆拱桥受力状态研究[J].湖南大学学报,2010(7):12-17.
Yi Lunxiong,Zhang Yezhi,Xu Shulei,etc. Mechanical Behavior of Rigid Frame Tied-arch Bridge on Passenger Dedicated Railway[J].Journal of Hunan University,2010(7):12-17.
[3] 杨克鉴,李凤芹,张亚丽. 大跨度上承式钢管混凝土拱桥设计研究[J]. 铁道工程学报,2008(12):66-71.
Yang Kejian,Li Fengqin,Zhang Yali. Research on the Design of Large Span Deck Steel Tube Concrete Arch Bridge[J].Journal of Railway Engineering Society, 2008(12):66-71.
[4] 罗甲生,李跃,王建辉,等.大跨度拱桥边拱钢拱肋与刚性系杆连接区域试验研究[J].桥梁建设,2007(1):39-42.
Luo Jiasheng,Li Yue,Wang Jianhui,etc. Test Study of Connection Area Between Side Steel Arch Rib and Rigid
Tie Member of Long-Span Arch Bridge[J].Bridge Construction,2007(1):39-42.
[5] 姜军,蒲黔辉,勾红叶.大跨度连续刚构拱组合桥梁拱墩结合块模型试验研究[J].公路交通科技,2010(7):69-74.
Jiang Jun,Pu Qianhui,Gou Hongye,etc. Experimental Test on Model of Beam, Arch and Pier Combination Area of Long-span Continuous Rigid Frame Composite Arch Bridge[J].Journal of Highway and Transportation Research and Development,2010(7):69-74.
[6] 黄玲玉.大跨度V形墩连续钢构拱组合桥结合部模型试验研究[D].成都:西南交通大学,2009.
Huang Lingyu. Model Test Study on the Joint of Long-span V-pier Continuous Steel Arch Composite Bridge[D].Chengdu: Southwest Jiaotong University,2009.
[7] 章开东.永修特大刚架系杆拱桥刚架拱稳定性和极限承载力分析[D].长沙:中南大学,2009.
Zhang Kaidong. Analysis on Stability and Ultimate Bearing Capacity of Rigid Frame Tied Arch Bridge of Yongxiu Super Large Rigid Frame[D].Changsha: Central South University,2009.
[8] 勾红叶.大跨度预应力混凝土V形刚构拱组合桥受力行为研究[D].成都:西南交通大学,2010.
Gou Hongye. Study on Mechanical Behavior of Long-span Prestressed Concrete V-shaped Rigid Frame Arch Composite Bridge[D].Chengdu: Southwest Jiaotong University,2010.

PDF(1084 KB)

3420

Accesses

0

Citation

Detail

段落导航
相关文章

/