The Random Response Analysis of Structure Subjected to Non-Stationary Seismic Excitation

Abstract:

The evolutionary power spectrum which can reflect the non-stationary characteristics of earthquake ground motion is estimated by the Hilbert-Huang Transform (HHT), and with reference to the experiential statistical method, an evolutionary spectrum prediction model for given earthquake magnitude and distance is established based on the 121 near-source acceleration records at rock surface with large magnitude from the ground motion database of western U S. The pseudo excitation method is adopted to acquire the solution for structure random response under specific non-stationary seismic excitation. The results demonstrate that the non-stationary contents included in seismic excitation will enlarge greatly the random response of structure in comparison with uniform modulation random excitation.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 3287-3290
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.3287
• Online since: January 2012
• Authors: Hao Wu, Xun An Zhang
• Keywords: Evolutionary Power Spectrum, HHT, Non-Stationary, Random Response

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