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http://dx.doi.org/10.5000/EESK.2005.9.1.025

Estimation of the First Modal Participation Factor of a Shear Building under Earthquake Load  

Hwang, Jae-Seung (전남대학교 건축학부)
Kim, Hong-Jin (포항산업과학연구원 강구조연구소)
Kang, Kyung-Soo (동명전보대학교 건축대학 건축공학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.9, no.1, 2005 , pp. 25-32 More about this Journal
Abstract
Seismic load is distributed to modes of a structure through the modal participation factor(MPF). The modal participation factor is essential to analyze structural response under earthquake load. MPF of a real structure differs from that of analytical mathematical model due to the error induced from analytical assumptions and during the construction. In this study, an identification method is proposed to calculate the 1st MPF of real structure based on $H^{\infty}$ optimal model reduction. The MPF is obtained from the relationship between observability and controllability matrices realized from system identification and those of a prototype 2-degree state space model. The proposed method is verified thorough numerical examples.
Keywords
the first modal participation factor; system identification; $H^{\infty}$ optimal model reduction; controllability matrix; observability matrix;
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