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Seismic damage estimation through measurable dynamic characteristics

Lakshmanan, N and Raghuprasad, BK and Muthumani, K and Gopalakrishnan, N and Sreekala, R (2007) Seismic damage estimation through measurable dynamic characteristics. In: Computers and Concrete, 4 (3). pp. 167-186.

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Abstract

Ductility based design of reinforced concrete structures implicitly assumes certain damage under the action of a design basis earthquake. The damage undergone by a structure needs to be quantified, so as to assess the post-seismic reparability and functionality of the structure. The paper presents an analytical method of quantification and location of seismic damage, through system identification methods. It may be noted that soft ground storied buildings are the major casualties in any earthquake and hence the example structure is a soft or weak first storied one, whose seismic response and temporal variation of damage are computed using a non-linear dynamic analysis program (IDARC) and compared with a normal structure. Time period based damage identification model is used and suitably calibrated with classic damage models. Regenerated stiffness of the three degrees of freedom model (for the three storied frame) is used to locate the damage, both on-line as well as after the seismic event. Multi resolution analysis using wavelets is also used for localized damage identification for soft storey columns.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to TechnoPress.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 17 Mar 2010 12:10
Last Modified: 19 Sep 2010 05:57
URI: http://eprints.iisc.ernet.in/id/eprint/26205

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