Effects of Scarp Topography on Seismic Response Under Inclined Waves

Abstract eng:
The seismic ground motion of a scarp topography under inclined P waves is analyzed using numerical simulation method, and the effects of the incident angle, the slope angle and the incident direction are also discussed. It is shown that: (1) The amplification factor increases gradually from scarp's bottom corner to top corner, and the incident angle, the slope angle and the incident direction have no effect. (2) When the incident angle is a constant, the amplification factor of scarp downside region is greater than that of upside region, regardless of the incident direction, but it increases with the growing of slope angel. (3) When the slope angle is a constant and waves incident from left side, for x component, amplification factor increases with the growing of incident angle, while for z component, the opposite is true. (4) When waves incident from right side, the maximal amplification factor is generally at top corner of scarp. If incident direction is reverse, the maximal amplification factor departs from the top corner, and the larger the slope angle, the greater the deviation. (5) When waves incident from left side, the x component amplification factor is larger compared with right incidence case, but z component amplification factor is not sensitive to the incident direction.

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