Masters Theses

Keywords and Phrases

Acoustic Emission; Concrete Fracture; Damage Detection; Earthquake Engineering; Masonry; Structural Health Monitoring

Abstract

"Masonry structures are vulnerable to earthquakes; their brittleness and discontinuous formation make them susceptible to collapse. In the event of an emergency, this could be detrimental and perhaps fatal. The area of Structural Health Monitoring (SHM) is focused on understanding the behavior of structures for the sake of safety and predicting their longevity. One applicable technique to monitor this behavior is Acoustic Emission (AE). Acoustic Emissions are transient elastic waves released as microcracks nucleate from stress intensities, coalesce into cracks and then accumulate as damage. AE monitoring is a favorable method because it is capable of detecting cracking from within a given solid while in operation and over a long time span.

Having a clear understanding of the fracture process can help engineers find the underlining problems with an existing structure, which is vital information for rehabilitation and guarded usage. In this study, AE signals (Hits) were collected from cyclic compression tests of experimental Concrete Masonry Units (CMU) prisms and cyclic lateral tests of experimental post-tensioned CMU shear walls. The tests captured the damage process of CMU as it was brought to failure. Quantitative parameters of the recorded AE hits were studied and a greater understanding of the underlining AE behavior of fracture within masonry was achieved"--Abstract, page iii.

Advisor(s)

Chen, Genda

Committee Member(s)

Elgawady, Mohamed
Sneed, Lesley
Stutts, Daniel S.

Department(s)

Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering

Publisher

Missouri University of Science and Technology

Publication Date

2015

Pagination

xi, 90 pages

Note about bibliography

Includes bibliographic references (pages 87-89).

Rights

© 2015 John Alexander Cain, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Library of Congress Subject Headings

Acoustic emission
Structural health monitoring
Structural failures
Concrete masonry -- Fracture
Earthquake engineering

Thesis Number

T 11139

Electronic OCLC #

1003210555

Share

 
COinS