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Related Concept Videos

Design Consideration01:22

Design Consideration

185
Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...
185
Stress: General Loading Conditions01:15

Stress: General Loading Conditions

306
To grasp the intricacy of real-world conditions where multiple loads are applied simultaneously to a structure, one might visualize a section passing through a specific point within a body, aligned parallel to the xy plane. This section is subjected to various forces, including original loads, normal forces, and shearing forces.
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes....
306
Applications of Stress01:04

Applications of Stress

260
Consider a structure made of a boom and a rod designed to support a load. These two components are connected by a pin and stabilized by brackets and pins. The boom and the rod are detached from their supports to assess the different stresses imposed on this structure, and a free-body diagram is drawn. Then, all the forces applied, including the load acting on the structure, are identified. The reaction forces exerted on both the boom and the rod are computed using the equilibrium equations.
The...
260
Unsymmetric Loading of Thin-Walled Members01:23

Unsymmetric Loading of Thin-Walled Members

104
Thin-walled members with non-symmetrical cross-sections are vital to engineering structures, offering material efficiency and structural integrity. However, unsymmetrical loading on these members leads to complex stress distributions, resulting in simultaneous bending and twisting can cause deformation or structural failure. The interaction between bending and twisting requires detailed analysis to ensure structural resilience.
The concept of the shear center is crucial in countering the...
104
Bearing Stress01:22

Bearing Stress

797
Bearing stress refers to the contact pressure between two separate bodies. To visualize this, imagine a bolt thrust through a plate. The bolt applies a force to the plate, which exerts an equal but opposite force back onto the bolt. This force isn't just a singular entity but a compilation of numerous smaller forces distributed across the contact surface between the bolt and the plate.
Due to the intricacy of these microforces, an average value, known as bearing stress, is often used by...
797
Indeterminate Structure01:18

Indeterminate Structure

530
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...
530

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Advancing a Non-Contact Structural and Prognostic Health Assessment of Large Critical Structures.

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  • 1Department of Mechanical and Aerospace Engineering, Monash University, Wellington Rd, Clayton, VIC 3800, Australia.

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Summary

Structural health monitoring of the Western Treatment Plant floating cover utilizes remote sensing due to its size and hazardous environment. Unmanned aerial vehicle (UAV)-based photogrammetry provides reliable data for predictive models and a future digital twin.

Keywords:
diagnosticsdigital twinlarge critical structuresnon-contact assessmentphotogrammetryprognosticsstructural health monitoringunmanned aerial vehicle

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Area of Science:

  • Engineering
  • Environmental Science
  • Remote Sensing

Background:

  • The Western Treatment Plant (WTP) floating cover is a large asset (approx. 470 m x 200 m) exposed to hazardous conditions and extreme weather.
  • Deformation of the cover is caused by accumulated sewage matter, necessitating robust monitoring.
  • Traditional monitoring methods are impractical due to the size and hazardous environment, requiring remote sensing techniques.

Purpose of the Study:

  • To integrate new research into a structural health monitoring strategy for the WTP floating cover.
  • To conceptualize an advanced engineering analysis tool for a future digital twin of the floating cover.
  • To leverage remote sensing data for a deeper understanding of the cover's structural response.

Main Methods:

  • Remote sensing techniques, specifically unmanned aerial vehicle (UAV)-based photogrammetry.
  • Generation of a digital elevation model (DEM) of the floating cover.
  • Acquisition of substantial data through regular UAV flights.

Main Results:

  • Demonstrated the effectiveness of UAV-based photogrammetry for DEM generation of the large floating cover.
  • Established that direct data from the floating cover is essential for predictive modeling.
  • Acquired a substantial dataset for analyzing operational conditions and structural response.

Conclusions:

  • UAV-based photogrammetry is a viable remote sensing method for monitoring the WTP floating cover.
  • The collected data supports the development of predictive models for structural health.
  • Findings contribute to the creation of an advanced digital twin for the floating cover.