Condition Assessment of Civil Structures under Earthquake Excitation

Abdullah Al-Hussein, Achintya Haldar

Research output: Contribution to journalArticle

Abstract

This paper presents a nondestructive rapid condition or health assessment procedure of three-dimensional civil structures following strong earthquakes. It is a nonlinear time domain system identification procedure and structures are represented by finite elements. The excitation time history may not be available soon after an earthquake and is not required to implement the procedure. The response time histories measured at a small part of a large structure, denoted as a substructure, can be noise-contaminated. The location and severity of defects in an element are evaluated by comparing its stiffness parameter with the previous value or deviation from the other similar members. The basic unscented Kalman filter concept available in the literature is significantly improved, increasing its implementation potential. The improved concept is developed by integrating the iterative least-squares, weighted global iteration, and objective function algorithms. The proposed concept is verified by assessing the health of large three-dimensional structures excited by earthquake time histories. The procedure is capable of identifying defects with different levels of severity in small or large civil structures. This study also indicates that the inspection outcomes are not sensitive to the location and configuration of the substructure. The capability and efficiency of the procedure are demonstrated with three informative examples.

LanguageEnglish (US)
Article number04018119
JournalJournal of Aerospace Engineering
Volume32
Issue number1
DOIs
StatePublished - Jan 1 2019

Fingerprint

Earthquakes
Health
Defects
Kalman filters
Identification (control systems)
Inspection
Stiffness

Keywords

  • Condition assessment
  • Damage identification
  • Earthquake excitation
  • Nondestructive evaluation
  • Structural identification
  • Unscented Kalman filter

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanical Engineering

Cite this

Condition Assessment of Civil Structures under Earthquake Excitation. / Al-Hussein, Abdullah; Haldar, Achintya.

In: Journal of Aerospace Engineering, Vol. 32, No. 1, 04018119, 01.01.2019.

Research output: Contribution to journalArticle

@article{590c341d23df40b0947ffe38a912fd0e,
title = "Condition Assessment of Civil Structures under Earthquake Excitation",
abstract = "This paper presents a nondestructive rapid condition or health assessment procedure of three-dimensional civil structures following strong earthquakes. It is a nonlinear time domain system identification procedure and structures are represented by finite elements. The excitation time history may not be available soon after an earthquake and is not required to implement the procedure. The response time histories measured at a small part of a large structure, denoted as a substructure, can be noise-contaminated. The location and severity of defects in an element are evaluated by comparing its stiffness parameter with the previous value or deviation from the other similar members. The basic unscented Kalman filter concept available in the literature is significantly improved, increasing its implementation potential. The improved concept is developed by integrating the iterative least-squares, weighted global iteration, and objective function algorithms. The proposed concept is verified by assessing the health of large three-dimensional structures excited by earthquake time histories. The procedure is capable of identifying defects with different levels of severity in small or large civil structures. This study also indicates that the inspection outcomes are not sensitive to the location and configuration of the substructure. The capability and efficiency of the procedure are demonstrated with three informative examples.",
keywords = "Condition assessment, Damage identification, Earthquake excitation, Nondestructive evaluation, Structural identification, Unscented Kalman filter",
author = "Abdullah Al-Hussein and Achintya Haldar",
year = "2019",
month = "1",
day = "1",
doi = "10.1061/(ASCE)AS.1943-5525.0000943",
language = "English (US)",
volume = "32",
journal = "Journal of Aerospace Engineering",
issn = "0893-1321",
publisher = "American Society of Civil Engineers (ASCE)",
number = "1",

}

TY - JOUR

T1 - Condition Assessment of Civil Structures under Earthquake Excitation

AU - Al-Hussein, Abdullah

AU - Haldar, Achintya

PY - 2019/1/1

Y1 - 2019/1/1

N2 - This paper presents a nondestructive rapid condition or health assessment procedure of three-dimensional civil structures following strong earthquakes. It is a nonlinear time domain system identification procedure and structures are represented by finite elements. The excitation time history may not be available soon after an earthquake and is not required to implement the procedure. The response time histories measured at a small part of a large structure, denoted as a substructure, can be noise-contaminated. The location and severity of defects in an element are evaluated by comparing its stiffness parameter with the previous value or deviation from the other similar members. The basic unscented Kalman filter concept available in the literature is significantly improved, increasing its implementation potential. The improved concept is developed by integrating the iterative least-squares, weighted global iteration, and objective function algorithms. The proposed concept is verified by assessing the health of large three-dimensional structures excited by earthquake time histories. The procedure is capable of identifying defects with different levels of severity in small or large civil structures. This study also indicates that the inspection outcomes are not sensitive to the location and configuration of the substructure. The capability and efficiency of the procedure are demonstrated with three informative examples.

AB - This paper presents a nondestructive rapid condition or health assessment procedure of three-dimensional civil structures following strong earthquakes. It is a nonlinear time domain system identification procedure and structures are represented by finite elements. The excitation time history may not be available soon after an earthquake and is not required to implement the procedure. The response time histories measured at a small part of a large structure, denoted as a substructure, can be noise-contaminated. The location and severity of defects in an element are evaluated by comparing its stiffness parameter with the previous value or deviation from the other similar members. The basic unscented Kalman filter concept available in the literature is significantly improved, increasing its implementation potential. The improved concept is developed by integrating the iterative least-squares, weighted global iteration, and objective function algorithms. The proposed concept is verified by assessing the health of large three-dimensional structures excited by earthquake time histories. The procedure is capable of identifying defects with different levels of severity in small or large civil structures. This study also indicates that the inspection outcomes are not sensitive to the location and configuration of the substructure. The capability and efficiency of the procedure are demonstrated with three informative examples.

KW - Condition assessment

KW - Damage identification

KW - Earthquake excitation

KW - Nondestructive evaluation

KW - Structural identification

KW - Unscented Kalman filter

UR - http://www.scopus.com/inward/record.url?scp=85054086324&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85054086324&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)AS.1943-5525.0000943

DO - 10.1061/(ASCE)AS.1943-5525.0000943

M3 - Article

VL - 32

JO - Journal of Aerospace Engineering

T2 - Journal of Aerospace Engineering

JF - Journal of Aerospace Engineering

SN - 0893-1321

IS - 1

M1 - 04018119

ER -