Generation of Synthetic Ground Motion

Abstract

The main target of the study is to generate artificial earthquake time histories which are compatible with real earthquakes. A simple frequency-domain method for generating time histories from the given response spectrum is presented in this research. Weighted average response spectra are generated using three attenuation relationships developed for the subduction zonesuitable for Barpak M7.8 earthquake records at TU, Kirtipur. The ground motions are simulated with consideration of source, site, and path. The simulation work is started from noise generation work with windowing, Fast Fourier Transform (FFT) and spectra matching (target and generated) to obtain simulated time history using MATLAB programming language. Simulated ground motions can be utilized as input ground motions for the dynamic analysis and design of new structures as well as retrofitting of existing structures.