Tomographic Imaging of Cementitious Materials

研究成果: Chapter

摘要

Cement-based materials such as concrete are brittle in nature and crack when subjected to tensile strain. Current strategies for crack detection are primarily based upon visual inspection by trained inspectors, but such approaches are labor-intensive and expensive. Direly needed are sensors that can be incorporated into structural health monitoring systems for automated quantification of crack damage. As cementitious composites remain the most dominant construction materials of structures, this study explores the use of these materials as their own sensor platform capable of measuring mechanical behavior under loading. Fundamentally, this self-sensing functionality is achieved based upon electromechanical properties. First, the piezoresistivity of cementitious composites is quantified to establish the material as a multifunctional system that is capable of self-sensing. Second, electrical impedance tomography (EIT) is proposed for measuring internal strain fields using only electrical measurements taken along the boundary of the structural element. The featured advantage of EIT is that it is a distributed sensing approach offering measurement of strain fields across 2D or 3D. Furthermore, the approach is well suited for imaging cracks that appear as conductivity reductions in EIT-derived conductivity maps. Finally, to validate the accuracy of the EIT technique, it is applied to fiber-reinforced cementitious composite elements loaded by axial tension-compression cycles and three-point bending.

原文English
主出版物標題Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering
發行者Elsevier Inc.
頁面121-149
頁數29
ISBN(電子)9781782423447
ISBN(列印)9781782423263
DOIs
出版狀態Published - 2016 一月 1

指紋

Acoustic impedance
Tomography
Imaging techniques
Cracks
Composite materials
Crack detection
Tensile strain
Structural health monitoring
Sensors
Cements
Compaction
Inspection
Personnel
Concretes
Fibers

All Science Journal Classification (ASJC) codes

  • Engineering(all)

引用此文

Hou, T-C. (2016). Tomographic Imaging of Cementitious Materials. 於 Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering (頁 121-149). Elsevier Inc.. https://doi.org/10.1016/B978-1-78242-326-3.00007-5
Hou, Tsung-Chin. / Tomographic Imaging of Cementitious Materials. Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering. Elsevier Inc., 2016. 頁 121-149
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Hou, T-C 2016, Tomographic Imaging of Cementitious Materials. 於 Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering. Elsevier Inc., 頁 121-149. https://doi.org/10.1016/B978-1-78242-326-3.00007-5

Tomographic Imaging of Cementitious Materials. / Hou, Tsung-Chin.

Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering. Elsevier Inc., 2016. p. 121-149.

研究成果: Chapter

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Hou T-C. Tomographic Imaging of Cementitious Materials. 於 Innovative Developments of Advanced Multifunctional Nanocomposites in Civil and Structural Engineering. Elsevier Inc. 2016. p. 121-149 https://doi.org/10.1016/B978-1-78242-326-3.00007-5