摘要
斜拱曲梁桥作为一种拱肋倾斜且主梁呈曲线的新型桥梁结构,因其构造复杂性与显著的空间效应,其施工监控技术与常规桥型相比存在明显差异。为探究此类桥梁施工监控的关键技术,该文以某大跨度斜拱曲梁桥为工程背景,从桥梁的施工过程仿真分析、现场监测、参数识别及调整等方面展开研究。通过对比板壳单元模型与杆系模型发现,板壳单元模型不仅具有更高的计算精度,还能全面反映斜拱曲梁桥的各向受力情况;同时,针对索力调整中传统影响矩阵法的局限性,提出了一种结合序列二次规划优化的改进方法,有效解决了索力优化不适用的问题。该研究成果可为同类桥梁的施工监控提供理论参考与技术支撑。
As a new structure with sloping arch ribs and curved main beams,a skewed arch and curved beam bridge markedly differs from the conventional bridge in construction monitoring technology due to its complex structure and prominent spatial effect.To investigate the key technology in construction monitoring,this study took a long-span skewed arch and curved beam bridge as the engineering background and discussed construction process simulation analysis,field monitoring,and parameter identification and adjustment of the bridge.The results show that the plate-shell unit model has higher calculation accuracy and can comprehensively show the stresses in all directions of the bridge compared with the beam element model.Additionally,in response to the limitations of the traditional influence matrix method in cable force adjustment,an improved method based on sequential quadratic programming optimization was proposed,addressing the issue of inapplicability in cable force optimization.The research findings can provide theoretical references and technical support for the construction monitoring of similar bridges.
作者
徐郁峰
张展涛
谢云飞
李子辉
XU Yufeng;ZHANG Zhantao;XIE Yunfei;LI Zihui(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou,Guangdong 510641,China)
出处
《中外公路》
2025年第3期121-129,共9页
Journal of China & Foreign Highway
基金
2020产学研类项目(产学研项目)(编号:x2tjB8200430)
2019年中央高校基本科研业务费成果转化项目(自然科学类)(编号:x2tjD2192960)。
关键词
斜拱曲梁
施工监控
板壳单元模型
序列二次规划
索力调整
skewed arch and curved beam
construction monitoring
plate-shell unit model
sequential quadratic programming
cable force adjustment
