基于监测数据和数值模拟的混凝土箱梁桥的温度场和温度效应
Mengxiang Zhai1, Hongyin Yang1,2, Bin Li3
1School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China.
Sensors (Basel, Switzerland)
|August 28, 2025
概括
这项研究使用监测数据和有限元模型分析了混凝土箱梁桥的温度. 发现太阳辐射下显著的温度变化, 影响桥梁安全, 需要更新的设计考虑.
科学领域:
- 结构工程
- 土木工程
- 材料科学
背景情况:
- 混凝土箱梁桥的长期使用安全性取决于温度场的分布及其影响.
- 了解这些热行为对于确保结构完整性和防止过早降解至关重要.
研究的目的:
- 通过使用长期结构健康监测数据,对武汉一座曲连续混凝土箱梁桥的温度场分布和温度影响进行调查.
- 建立精确的有限元模型以预测不同条件下的桥梁温度反应.
- 确定关键温度梯度及其对桥梁安全的影响,特别是在极端天气下.
主要方法:
- 使用来自混凝土箱梁桥的长期结构健康监测数据.
- 使用专用软件开发了一个有限元模型进行温度场分析.
- 采用波形分析来消除监测数据,以提高可靠性.
- 构建极端天气文件以模拟不利的条件.
主要成果:
- 在梁温度和环境温度之间发现了强烈的相关性.
- 在阳光照射下的混凝土箱梁中观察到显著的垂直和横向温度差异.
- 根据测量数据验证了有限元模型的准确性.
- 在武汉极端天气下建立不利的垂直和横向温度梯度模型.
- 在目前规格不涵盖的网和底板上发现了明显的温度差异.
- 观测到梁的相对位移和底板应力与梁温度之间有很强的相关性.
结论:
- 这项研究成功地模拟和分析了混凝土箱梁桥上的温度场和效应.
- 结果强调需要考虑特定的温度梯度,特别是发生在网和底板上的温度梯度,这些温度梯度目前还没有被设计规范所解决.
- 这项研究提供了有价值的数据,用于改进受不同温度影响的混凝土箱梁桥的设计,安全评估和维护策略.
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