在施工过程中研究多个塔楼和高的部分吊桥在施工过程中的结构稳定性
Chenglong Zhu1, Lingbo Wang1,2, Yixiang Liu1
1School of Highway, Chang'an University, Shaanxi, Xi'an, China.
PloS one
|December 12, 2024
概括
这项研究分析了多塔吊桥的施工安全性. 研究结果表明,码头的刚性对稳定性至关重要,特别是在用电缆进行悬臂施工时,强调需要管理码头并避免不利因素.
科学领域:
- 结构工程 结构工程
- 桥梁建设 桥梁建设
- 有限元分析 有限元分析
背景情况:
- 带有多个塔楼和高的部分吊桥带来了独特的建筑挑战.
- 在各个施工阶段确保结构安全性和稳定性对于这些复杂的结构至关重要.
- 之前的研究可能无法完全解决增量施工期间此类桥梁的动态稳定性.
研究的目的:
- 为了澄清多塔,高部分吊桥在施工过程中的结构安全性和稳定性.
- 识别关键的施工阶段和影响结构稳定的因素.
- 为类似的桥型提供设计和施工建议.
主要方法:
- 开发了一个有限元分析模型,用于一个五塔,六跨部分电缆桥.
- 在关键建筑阶段进行线性弹性和非线性稳定性分析.
- 对主塔,主码头和主梁刚度进行了灵敏度分析;研究了组合的不利因素.
主要成果:
- 所有施工阶段都符合稳定性要求,线性弹性系数>4.0和非线性>2.5.
- 带有电缆的最大悬臂施工是最关键的阶段,主要码头的纵向不稳定性是主要的故障模式.
- 主码头的硬度显著影响稳定性;减少码头的硬度与不利因素 (篮子脱落,不对称的结构) 相结合,稳定性降低了15%以上.
结论:
- 使用电缆进行最大悬臂施工的阶段需要主要关注多塔,高的部分悬缆桥梁.
- 加强码头的维护和管理,避免不利的建筑因素对于确保结构安全至关重要.
- 该研究为建造和设计可比的桥梁项目提供了宝贵的见解.
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