Research on artificial synthetic seismic record based on adaptive positive definite least squares method

摘要

Earthquake is a typical natural stochastic process, and the ground movement caused by earthquake cannot be accurately predicted. Traditional method of generating artificial seismic record is based on empirical and least squares method. This method is suitable for general geology, but has poor applicability and low efficiency for unconventional cases. An adaptive regression method is proposed in this paper to synthesise artificial seismic record, and the effect of seismic duration on response spectrum is considered. A numerical model is further established to verify the effectiveness of the artificial seismic record. The results show that the structure dynamic response under the synthesised artificial seismic record in this paper is close to the natural seismic record, which has significant engineering reference value.