TY - JOUR
T1 - Complexities in assessing structural health of civil infrastructures
AU - Al-Hussein, Abdullah
AU - Haldar, Achintya
N1 - Publisher Copyright:
© 2017 Abdullah Al-Hussein and Achintya Haldar.
PY - 2017
Y1 - 2017
N2 - The complexity in the health assessment of civil infrastructures, as it evolves over a long period of time, is briefly discussed. A simple problem can become very complex based on the current needs, sophistication required, and the technological advancements. To meet the current needs of locating defect spots and their severity accurately and efficiently, infrastructures are represented by finite elements. To increase the implementation potential, the stiffness parameters of all the elements are identified and tracked using only few noise-contaminated dynamic responses measured at small part of the infrastructure. To extract the required information, Kalman filter concept is integrated with other numerical schemes. An unscented Kalman filter (UKF) concept is developed for highly nonlinear dynamic systems. It is denoted as 3D UKF-UI-WGI. The basic UKF concept is improved in several ways. Instead of using one long duration time-history in one global iteration, very short duration time-histories andmultiple global iterations with weight factors are used to locate the defect spot more accurately and efficiently. The capabilities of the procedure are demonstrated with the help of two informative examples.The proposed procedure is much superior to the extended Kalman filter-based procedures developed by the team earlier.
AB - The complexity in the health assessment of civil infrastructures, as it evolves over a long period of time, is briefly discussed. A simple problem can become very complex based on the current needs, sophistication required, and the technological advancements. To meet the current needs of locating defect spots and their severity accurately and efficiently, infrastructures are represented by finite elements. To increase the implementation potential, the stiffness parameters of all the elements are identified and tracked using only few noise-contaminated dynamic responses measured at small part of the infrastructure. To extract the required information, Kalman filter concept is integrated with other numerical schemes. An unscented Kalman filter (UKF) concept is developed for highly nonlinear dynamic systems. It is denoted as 3D UKF-UI-WGI. The basic UKF concept is improved in several ways. Instead of using one long duration time-history in one global iteration, very short duration time-histories andmultiple global iterations with weight factors are used to locate the defect spot more accurately and efficiently. The capabilities of the procedure are demonstrated with the help of two informative examples.The proposed procedure is much superior to the extended Kalman filter-based procedures developed by the team earlier.
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U2 - 10.1155/2017/2623805
DO - 10.1155/2017/2623805
M3 - Article
AN - SCOPUS:85030677054
SN - 1076-2787
VL - 2017
JO - Complexity
JF - Complexity
M1 - 2623805
ER -