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A Novel Embeddable Tubular Piezoceramics-Based Smart Aggregate for Damage Detection in Two-Dimensional Concrete

Weihang Gao1, Hongnan Li2, Siu Chun Michael Ho3

  • 1State Key Lab of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China. 625922881@mail.dlut.edu.cn.

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Summary

A new tubular smart aggregate (TSA) effectively monitors two-dimensional concrete structures. This piezoceramic-based transducer generates uniform stress waves, improving damage detection in planar structures like floors and pavements.

Keywords:
piezoceramicstructure health monitoringtubular smart aggregate (TSA)two-dimensional (2D) concrete structures

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Area of Science:

  • Materials Science and Engineering
  • Civil Engineering
  • Structural Health Monitoring

Background:

  • Piezoceramic materials are crucial for structural health monitoring (SHM) due to their advantageous properties.
  • Existing piezoceramic smart aggregates (SA) and spherical smart aggregates (SSA) have limitations in generating stress waves suitable for 2D structures.
  • The geometric constraints of SA and SSA make them inadequate for planar concrete elements such as shear walls, floors, and pavements.

Purpose of the Study:

  • To design, fabricate, and test a novel embeddable tubular smart aggregate (TSA) for SHM in 2D concrete structures.
  • To address the limitations of existing transducers by enabling radially uniform stress wave generation.
  • To evaluate the TSA's capability in transmitting and measuring stress waves for effective damage detection in planar structures.

Main Methods:

  • Development of a unique tubular smart aggregate (TSA) utilizing a piezoceramic tube.
  • Experimental investigation of the TSA's performance through impedance analysis.
  • Assessment of stress wave propagation using time of arrival and sweep frequency analyses.

Main Results:

  • The TSA successfully generates radially uniform stress waves, overcoming the geometric limitations of previous designs.
  • Impedance analysis, time of arrival, and sweep frequency analyses confirmed the TSA's functionality.
  • The experimental data validates the TSA's suitability for transmitting and measuring stress waves in 2D concrete structures.

Conclusions:

  • The novel tubular smart aggregate (TSA) is a promising technology for structural health monitoring of two-dimensional concrete structures.
  • The TSA's design facilitates uniform stress wave propagation, enhancing damage detection capabilities in planar elements.
  • This research provides a foundation for advanced SHM systems in critical infrastructure like floors and pavements.