Effects of strength envelope platform on the artificial ground motion

Artificial ground motion can make up for the lack of actual ground motion as ground motion input, while the previous study showed insufficient consideration of the strength envelope. This article introduces the multi-peak point strength envelope model, i.e., Ainin and Ang model, and the technology of artificial ground motion considering trigonometric series stacking technology. Taking random numbers and actual ground motion phases as initial phases, the influence of the length and position of the platform on the response spectrum and the artificial acceleration time histories has been presented. The results show: (1) the fitting effect of the response spectrum varies with position of the strength envelope platform; (2) the strength envelope platform determines the position of PGA (peak acceleration of ground motion); (3) Taking phases of the strong motion record as initial phases, the response spectra are better fitted.