My questions are about the calculation of Site Fundamental Frequency using Horizontal to Vertical Spectral Ratio (HVSR) based on the Fourier amplitude spectrum:
As the distance from the source of the earthquake increases, the difference between the acceleration of the horizontal and vertical components becomes very large, and by dividing these two values, no matter how large the horizontal component is, when divided by the vertical component, its effect is very small. How can this effect be explained?
The amplification due to the surface layer is related to the impedance ratio between the base ground and surface layer, with a horizontal component H and a vertical component V. Because the impedance ratio of the propagation velocity between the surface layer and the base ground is considered larger for the horizontal component, the predominant frequency will be considerably higher for vertical motion, although the amplification of vertical motion will be smaller. In any case, the amplification of vertical motion should be significantly smaller in the frequency band predominating the horizontal motion.
- Badges
- Science topic
- Similar topics
- Computer Science and Engineering
- Computer Graphics and Animation
- 3D