doi:

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


Abstract:
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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