基于长期测量和梯度增强回归树方法的桥梁电缆温度作用的调查
Fen Wang1, Gonglian Dai1, Yonglu Liu2,3
1School of Civil Engineering, Central South University, Changsha 410075, China.
Sensors (Basel, Switzerland)
|July 8, 2023
概括
这项研究表明,桥梁中的电缆经历了每天和每年显著的温度变化. 准确的桥梁设计需要考虑这些温度波动,以获得可靠的电缆性能.
科学领域:
- 土木工程 土木工程是指土木工程.
- 结构工程 结构工程
- 桥梁工程 桥梁工程
背景情况:
- 电缆架桥对于高速铁路至关重要,需要精确的电缆温度评估来设计,建造和维护.
- 现有的关于桥梁中的电缆温度场的知识是不够的,这突显了结构工程中的关键差距.
- 准确的温度数据对于确保长跨式电缆桥的安全性和运行效率至关重要.
研究的目的:
- 为了研究停留电缆内的温度场分布.
- 分析电缆温度的时间变化 (每日和年周期).
- 为了确定电缆桥梁的设计目的,用于电缆桥梁的代表性电缆温度.
主要方法:
- 一个长达一年的电缆段实验在一座桥附近进行.
- 监测电缆温度和同时收集气象数据.
- 梯度增强回归树和极端值分析用于温度建模的应用.
主要成果:
- 电缆温度分布在横截面上基本均,没有显著的梯度.
- 在停留的电缆中观察到每年和每日温度变化的显著幅度.
- 电缆温度和环境变量之间建立了强烈的关系.
结论:
- 考虑每日波动和均温度的年度周期对于准确的电缆温度变形分析至关重要.
- 该研究提供了对长跨式悬索桥的运行和维护的基本数据和方法.
- 这些发现有助于改善铁路桥梁的设计标准和结构健康监测.
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