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相关概念视频

Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

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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...
445
Cable Subjected to a Distributed Load01:24

Cable Subjected to a Distributed Load

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The analysis of suspension bridges is a complex and critical process that involves multiple factors, including the shape and tension of the main cables. The main cables of suspension bridges are subjected to distributed loads, which result in changes in tensile forces and deformation of the cable. These loads must be carefully considered to ensure that the bridge is safe and capable of supporting the weight of different loads.
723
Design of Prismatic Beams for Bending01:23

Design of Prismatic Beams for Bending

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The design of prismatic beams, structural elements with a uniform cross-section, focuses on ensuring safety and structural integrity under load. The design process begins by determining the allowable stress, either from material properties tables, or by dividing the material's ultimate strength by a safety factor. This safety factor is essential for accommodating uncertainties, and varies depending on the material—timber, steel, or concrete—with each having unique strength and...
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Indeterminate Structure01:18

Indeterminate Structure

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Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium.  Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
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Deformation of a Beam under Transverse Loading01:15

Deformation of a Beam under Transverse Loading

334
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
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Prismatic Beams: Problem Solving01:15

Prismatic Beams: Problem Solving

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In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
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最小信息数据建模 (MID) 和一个易于实施的低成本SHM系统用于短跨度桥梁.

Connor O'Higgins1, David Hester1, Patrick McGetrick2

  • 1School of Natural and Built Environment, Queen's University Belfast, University Road, Belfast BT7 1NN, UK.

Sensors (Basel, Switzerland)
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概括

最小信息数据建模 (MID) 为桥梁结构健康监测 (SHM) 提供了一种具有成本效益的解决方案. 这种基于振动的方法可靠地检测出表明损坏的小频率变化,使得桥梁监测更容易获得.

关键词:
数据建模的数据建模.环境影响 环境影响长期的桥梁监测.低成本的低成本的成本.这是一个回归回归的回归.结构健康监测 结构健康监测

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科学领域:

  • 工程 工程师 工程师 工程师
  • 土木工程 土木工程是指土木工程.
  • 结构健康监测 结构健康监测

背景情况:

  • 结构健康监测 (SHM) 确保结构安全和性能.
  • 基于振动的监测是成本高效的,但通常需要密集的传感器网络.
  • 物流方面的挑战限制了基于振动的SHM在短跨度和中跨度桥梁上的应用.

研究的目的:

  • 调查最小信息数据建模 (MID) 的可行性,用于监控中短跨度桥梁.
  • 评估MID是否能够检测出标志着结构损坏的小频率转移.
  • 为广泛监控桥梁网络展示一种具有成本效益的方法.

主要方法:

  • 建议使用低成本,易于实施的传感器进行最小信息数据建模 (MID).
  • 研究了MID的可行性,用于短期和中期跨度桥梁监测.
  • 评估了MID数据模型检测频率转移的能力.

主要成果:

  • MID数据模型可靠地检测到低至0.01 Hz的频率变化.
  • 这种检测水平与在桥梁损坏案件中报告的轮班相似.
  • 数据收集设备的成本约为370英.

结论:

  • MID是一种可行的方法来监控短跨度和中跨度桥梁.
  • MID的准确性表明其作为损坏检测方法的潜力.
  • 由于MID的低成本,可以在整个网络上进行桥梁监控.