带拱形加劲弦的双层钢桁梁桥竖向承载性能分析

赵炳震; 韩一博; 李鹏飞; 李阳; 陈志华; 王俊; 刘红波; 王天松; 刘洋

doi:10.3724/j.gyjzG24082604

带拱形加劲弦的双层钢桁梁桥竖向承载性能分析

doi: 10.3724/j.gyjzG24082604

赵炳震¹,
韩一博³,
李鹏飞¹,
李阳¹,
陈志华^3,4,
王俊²,
刘红波^3,4,5,
王天松²,
刘洋^3,4

1. 陕西建工集团股份有限公司, 西安 710003;
2. 陕西华山路桥集团有限公司, 西安 710026;
3. 天津大学建筑工程学院, 天津 300072;
4. 天津大学滨海土木工程结构与安全教育部重点实验室, 天津 300072;
5. 河北工程大学土木工程学院, 河北邯郸 056000

基金项目:

陕西省交通厅科研项目(24-54K)

陕西省住房和城乡建设厅科技计划项目(2023-K21)。

详细信息

作者简介:
赵炳震,高级工程师,博士,主要从事钢结构领域的研究。电子信箱:harvestzbz@tju.edu.cn

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出版历程
- 收稿日期: 2024-08-26
- 网络出版日期: 2025-03-28

Analysis of the Vertical Bearing Performance of a Double-Layer Steel Truss Bridge with Arched Stiffening Chords

1. Shaanxi Construction Engineering Group Corporation Limited, Xi'an 710003, China;
2. Shaanxi Huashan Road and Bridge Group Corporation Limited, Xi'an 710026, China;
3. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
4. Key Laboratory of Coast Civil Structure Safety of China Ministry of Education, Tianjin University, Tianjin 300072, China;
5. School of Civil Engineering, Hebei University of Engineering, Handan 056000, China

摘要

摘要: 依托西安地铁10号线跨渭河公轨合建大桥实际工程,采用ABAQUS有限元分析软件对安装拱形加劲弦的双层钢桁梁桥受力性能展开研究。首先,依据缩尺模型试验,选取了中间3跨带拱形加劲弦段,考虑边界条件建立了拱形加劲弦双层钢桁梁桥有限元分析模型,对其开展了竖向加载模拟,将有限元模拟结果与已完成的缩尺模型试验结果进行对比,结果显示弹性阶段下荷载-位移曲线、荷载-应变曲线均吻合良好且处于弹性,验证了模拟方法的可靠性。最后基于验证后的有限元模型开展了参数化分析,研究了拱形加劲弦竖杆布置数量及方式等关键参数对双层钢桁梁桥竖向承载性能影响规律。结果表明:调整加劲弦竖杆布置形式后,中间跨及边跨跨中位移、支座上方腹杆应变变化不明显,而支座处上弦杆应力略有增加,最高处加劲弦杆应力明显增加。加劲弦弦杆下每个节点上方布置1根竖杆的方式虽然增加一定用钢量,但能够对结构挠曲变形、杆件应变控制起到有利作用,并且造型均匀美观,因此建议维持此种方案。
- 拱形加劲弦 /
- 双层钢桁梁桥 /
- 数值模拟 /
- 参数化分析 /
- 设计建议
Abstract: Based on the actual project of the Xi’an Metro Line 10 combined road-rail bridge crossing the Weihe River,the mechanical properties of a double-layer steel truss bridge with arched stiffening chords were investigated by using the ABAQUS finite element analysis software, a model focusing on the middle three spans with arched stiffening chords was established considering boundary conditions. Vertical load simulations were compared with the results from scaled model tests. The comparisons showed that the load-displacement and load-strain curves in the elastic stage matched well, confirming the reliability of the simulation method. A parametric analysis was then conducted to examine the effects of the number and arrangement of vertical rods on the vertical bearing performance of the bridge. The results indicated that adjusting the vertical rod arrangement had minimal impact on mid-span displacements and web member strains above the supports, but slightly increased the stress in the top chord at the supports and significantly increased stress in the stiffening chord members at the highest point. Arranging one vertical rod above each joint under the stiffening chord increased the steel consumption, but it could effectively control the structural deformation and member strain, and provide a uniform and aesthetically pleasing design. This arrangement is therefore recommended.
- arched stiffening chord /
- double-layer steel truss bridge /
- numerical simulation /
- parametric analysis /
- design recommendations

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