%0 Journal Article
%T A SURVEY OF MATLAB EFFICIENCYIN DAMAGE DETECTION IN CONCRETE GRAVITY DAMS
%J Int. J. of Aquatic Science
%I
%Z 2008-8019
%A Aparna, L.N.
%A V, Nandhini
%A Madhan, P.
%D 2021
%\ 03/01/2021
%V 12
%N 1
%P 574-593
%! A SURVEY OF MATLAB EFFICIENCYIN DAMAGE DETECTION IN CONCRETE GRAVITY DAMS
%K Concrete Gravity Dams
%K Frequency analysis
%K Failure
%K wavelet analysis
%K SAP2000
%R
%X Detection of damage in concrete gravity dams (CGDs) is one of thechallenges that need to be overcome since dam failure may lead to irreversibleconsequences. This research aims to detect structural damage within CGDs by waveletanalysis. From a structural point of view, stiffness is an important factor in the dynamicbehaviour of concrete gravity dam systems. Any sudden change in the stiffness leads toalteration in the dynamic response of the structures. The proposed analysis of such acondition will help to investigate the responses before and after the occurrence of anystructural damage. The main contributions of this paper are to detect the existence of anydamage in the dam structure and determine the damage location along the height of thedam. In order to achieve these purposes, three finite element models of the Pine Flat,Bluestone, and Folsom dams are chosen as case studies. These dams have been modelledfor both intact and damaged states, and their geometrical, physical, and mechanicalcharacteristics are defined by SAP2000 software. A series of modal analyses wasperformed to determine the frequencies and shapes of the structural motions. Afterreduction of the elasticity modulus by 20% and 50%, the Discrete Wavelet Transform(DWT) was applied to the difference between the intact and damaged observations.Then, the DWT outputs were analysed to get information about the existence of damageas well as its location in the dam structure. Overall, from the obtained results, the mainfinding of this study states that the location and severity of the structural damages havebeen efficiently detected according to the significant amplitude variations in DWTdiagrams.
%U https://www.journal-aquaticscience.com/article_149962_63d0e913941169483cba29be55203892.pdf