Comparative study of damage detection in symmetric and asymmetric buildings

Wang, Y. and Thambiratnam, D. P. and Chan, T. H. T. and Nguyen, A. (2017) Comparative study of damage detection in symmetric and asymmetric buildings. In: 4th Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures (SMAR 2017), 13–15 Sept 2017, Zurich, Switzerland.

Abstract

Aesthetics and functionality requirements have made most buildings asymmetric in recent times. Such buildings exhibit complex vibration under dynamic loads as there is coupling between the lateral and torsional components of vibration, and are referred to as torsionally coupled buildings. These building require three dimensional modelling and analysis. In spite of much recent research and some successful applications of damage detection and assessment methods to civil structures in recent years, the applications to asymmetric buildings remains a challenging task for civil engineers. Less investigation has been made on the methodologies for detecting and locating damage specific to torsionally coupled asymmetric buildings. This paper aims to investigate and compare the difference in vibration behavior between symmetric and asymmetric buildings and the use of vibration characteristics for predicting damage in them. The need for developing a special method to detect damage in asymmetric buildings becomes evident. Towards this end, the paper presents a technique based on a modified version of the traditional modal strain energy method. The modified approach is developed from Stubbs’ modal strain energy damage index by decomposing the mode shape into lateral and vertical components. The procedure is illustrated through numerical studies conducted on a three dimensional five-story symmetric and asymmetric frame structure with the same layout. Vibration parameters obtained from finite element analysis of the intact and damaged building models are then applied into the proposed algorithms for detecting and locating the damage in these buildings.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 July 2013 -)
Date Deposited: 05 Jul 2019 04:22
Last Modified: 18 Sep 2019 05:48
Uncontrolled Keywords: structural deterioration; structural health monitoring; asymmetric buidlings
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
URI: http://eprints.usq.edu.au/id/eprint/36694

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