DOI: 10.3724/SP.J.1249.2018.02128

Journal of Shenzhen University Science and Engineering (深圳大学学报理工版) 2018/35:2 PP.128-131

Calculation of CQC mode correlation coefficients under filtered white noise model of earthquake ground motion

When filtered white noise is used to model ground motion, the computation of complete quadratic combination (CQC) modal correlation coefficients by integration of rational function becomes difficult, and the closed-form formulas become tedious and impractical. We propose a new method to obtain modal correlation coefficients by transforming transfer function model into state space model and then by solving a Lyapunov equation. This method can be extended to the situation where filtered white noise ground motion models are used. Kanai/Tajimi model is used to verify the correctness of the proposed method. It is not only concise, reliable and numerical efficient but also can avoid solving tedious closed-form formulas of integration of rational functions.

Key words:seismic engineering,modal correlation coefficient,complete quadratic combination,mode-superposition response spectrum analysis,Lyapunov equation,filtered white noise

ReleaseDate:2018-03-20 15:26:56

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