在运行条件下的预制组装多桥中,对脚连接的基于硬度的评估
Zhiqiang Shang1,2, Fengzong Gong3, Zhufeng Shao4
1Shandong Hi-Speed Group Innovation Research Institute, Jinan 250102, China.
Sensors (Basel, Switzerland)
|July 13, 2024
概括
这项研究引入了一种基于刚度的新方法,用于检测组装多支架桥梁 (AMGB) 中的链关节损伤. 该方法准确地确定损坏的位置和程度,克服现有方法的局限性.
科学领域:
- 结构工程 结构工程
- 桥梁健康监测 桥梁健康监测
- 损坏检测检测 损坏检测 损坏检测
背景情况:
- 关节损伤是预制组装多桥 (AMGB) 的一个重大问题.
- 目前的损害评估方法,如损害指标和有限元模型 (FEM) 更新,具有限制,包括数据要求和程序复杂性.
- 有效和精确的损坏检测对于保持AMGBs的结构完整性至关重要.
研究的目的:
- 提出一种基于刚性的新方法来评估AMGB的性能和检测AMGB链关节的损伤.
- 开发基于刚度比的损坏指标,以提高损坏评估的准确性.
- 为确定链关节损伤的位置和程度提供可靠的方法.
主要方法:
- 通过解决多束系统的特征方程来估计链关节的刚性.
- 使用设计数据和FEM确定基线关节刚度.
- 制定一个全面的评估框架,将FEM与基线度结合起来,以创建基于度比的损伤指标.
- 从实际的桥梁监测数据中分析应变和位移的相关性.
主要成果:
- 提出的基于硬度的方法准确地估计了关节关节的硬度.
- 应变和位移相关性通过使用现实世界的桥梁数据验证了该方法的有效性.
- 开发的损伤指标有效地确定了链关节损伤的位置和程度.
结论:
- 与现有技术相比,拟议的基于硬度的方法为AMGB中链关节损伤检测提供了更有效和更准确的方法.
- 该方法为桥梁的结构健康监测和维护提供了可靠的工具.
- 可以准确确定损坏位置和程度,从而提高桥梁的安全性和寿命.
相关概念视频
Method of Joints: Problem Solving II
564
Consider a truss structure with frictionless joints fixed to a wall and roller support. If a force of 150 N is applied to joint A, the forces in each member of the truss can be determined using the method of joints.
564
Method of Joints: Problem Solving I
1.1K
The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint. Consider a truss structure with two forces of 20 N and 10 N acting at joints C and D, respectively. The method of joints can be used to determine the forces FCB, FDC,...
1.1K
Method of Joints
781
The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint.
Since plane truss members are in the same plane, each joint is subjected to a coplanar and concurrent force system. To apply the method of joints, the first step is to...
Since plane truss members are in the same plane, each joint is subjected to a coplanar and concurrent force system. To apply the method of joints, the first step is to...
781
Design Example: Strain Gauge Bridge or Wheatstone Bridge
393
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
393
Bending of Members Made of Several Materials
147
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
147
Structural Joints: Fibrous Joints
2.0K
Fibrous joints are a type of joint where the bones are connected by fibrous connective tissue. These joints provide stability and minimal to no movement between the articulating bones. There are three types of fibrous joints.
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
2.0K


