A procedure for simulating synthetic accelerograms compatible with correlated and conditional probabilistic response spectra |
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| Institution: | 1. University Goce Del?ev, Department of Computer Science, To?o Arsov 14, 2000 ?tip, Former Yugoslav Republic of Macedonia;2. Univer sity of Southern California, Department of Civil Engineering, Los Angeles, CA 90089-2531, USA;3. Canadian Nuclear Safety Commission, 280 Slater Street, Ottawa, Ontario K1P 5S9, Canada;1. College of Civil Engineering, Hunan University, Changsha 410082, PR China;2. Key Lab on Damage Diagnosis for Engineering Structures of Hunan Province, Hunan University, Changsha 410082, PR China;1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;2. Department of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027, USA;3. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China |
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| Abstract: | The modeling of seismic load is a major topic that has to be addressed thoroughly in the framework of performance based seismic analysis and design. In this paper, a simple procedure for simulating artificial earthquake accelerograms matching the statistical distribution of response spectra, as given by median ground motion prediction equations, the standard deviation and correlation coefficients, is proposed. The approach follows the general ideas of the (natural) ground motion selection algorithms proposed by Baker 4] and Wang 43] but using simulated (artificial) “spectrum-compatible” accelerograms. This allows to simulate spectrum-compatible accelerograms featuring variability similar to the one of recorded accelerograms when the match of median and ±1 standard-deviation response spectra is imposed by the regulator. The procedure is illustrated by an application to the NGA ground motion data and models. |
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| Keywords: | Spectrum compatible Power spectral density Correlation Simulation Ground motion Conditional spectrum |
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