Modal and seismic damage identification of a tall building model

Yiqing Ni, X. T. Zhou, J. M. Ko

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)

Abstract

This paper presents an experimental investigation on modal identification and seismic damage detection of a 38-story tall building model. The 1:20 scale reinforced concrete structure was tested on a threedirectional shaking table by exerting successively enhanced ground earthquake excitation to generate trifling, moderate, serious and complete (nearly collapsed) damage, respectively. After the earthquake excitation at each level, a 20-minute white-noise random excitation of low intensity is applied to produce ambient vibration response, from which modal properties of the tested structure in healthy state and after experiencing each of the four levels of earthquake excitation are identified. For comparison, the modal parameters are identified using both the random excitation and response, and using only the random response, respectively. With the identified modal parameters at each damage stage, three model-free damage indices, i.e., COMAC vector, normalized modal flexibility vector and modal curvature Z-value vector, are constructed for seismic damage evaluation. The predicted damage by these indices is compared with true damage observed during the tests.
Original languageEnglish
Title of host publicationStructural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure
Pages575-583
Number of pages9
Volume1
Publication statusPublished - 1 Dec 2003
Event1st International Conference on Structural Health Monitoring and Intelligent Infrastructure, SHMII-1'2003 - Tokyo, Japan
Duration: 13 Nov 200315 Nov 2003

Conference

Conference1st International Conference on Structural Health Monitoring and Intelligent Infrastructure, SHMII-1'2003
CountryJapan
CityTokyo
Period13/11/0315/11/03

ASJC Scopus subject areas

  • Building and Construction
  • Architecture

Cite this