Research on the dynamic response characteristics of ground fissure site under earthquake

In order to accurately describe the dynamic characteristics of the ground fissure site, a three-dimensional dynamic numerical analysis model of the ground fissure site was established by using ABAQUS finite element software, and the peak acceleration (PGA) and peak velocity of the ground fissure field were quantitatively analyzed. (PGV), Housner intensity (HI) and Arias intensity (Ia) under different earthquakes, the dynamic response law of the ground fissure site was obtained, and compared with the results of the shaking table model test, showing good consistency. The results show that the dynamic response amplification factor and the influence range of the upper wall are larger than those of the lower wall, reaching the maximum near the ground fissure and decreasing to both sides, showing a "λ" distribution; with the increase of the seismic intensity, the soil softening degree increases, The difference between the dynamic response magnification factor and the magnification factor on both sides of the fractu