Commenced in January 2007
Paper Count: 30753
Effect of Scarp Topography on Seismic Ground Motion
Abstract:Local irregular topography has a great impact on earthquake ground motion. For scarp topography, using numerical simulation method, the influence extent and scope of the scarp terrain on scarp's upside and downside ground motion are discussed in case of different vertical incident SV waves. The results show that: (1) The amplification factor of scarp's upside region is greater than that of the free surface, while the amplification factor of scarp's downside part is less than that of the free surface; (2) When the slope angle increases, for x component, amplification factors of the scarp upside also increase, while the downside part decrease with it. For z component, both of the upside and downside amplification factors will increase; (3) When the slope angle changes, the influence scope of scarp's downside part is almost unchanged, but for the upside part, it slightly becomes greater with the increase of slope angle; (4) Due to the existence of the scarp, the z component ground motion appears at the surface. Its amplification factor increases for larger slope angle, and the peaks of the surface responses are related with incident waves. However, the input wave has little effects on the x component amplification factors.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1132132Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 449
 Tian Q. W., Yuan Y. F. Engineering Seismology. Beijing: Seismological Press, 2012.
 Hu Y. X., Sun P. S., Zhang Z. Y., et al. "Effects of site conditions on earthquake damage and ground motion". Earthquake Engineering and Engineering Vibration, 1980.
 Sun P. S., Hu Y. X., Tian Q. W., et al. Seismic intensities distribution and site effect of the Lancang-Gengma earthquake// Proceedings of the seismic intensities of Lancang-Gengma earthquake. Beijing: Science Press, 1991.
 Davis L. L., West L. R. "Observed effects of topography on ground motion". Bulletin of the Seismological Society of America, 1973, 63(1):283-298.
 Clough R. W., Chopra A. K. "Earthquake stress analysis in earth dams". Journal of the Engineering Mechanics Division, 1966, 92(2): 197- 212.
 Zhou Z. H., Wang Y. S., Wang W., et al. The effect of ridge topography on strong ground motion in Wenchuan Ms 8.0 earthquake: The case of Xishan Park, Zigong// Proceedings of the symposium to mark the first anniversary of the Wenchuan earthquake. Beijing: Seismological Press, 2009: 58-64.
 Trifunac M. D. "Scattering of plane SH-waves by a semi-cylindrical canyon". Earthquake Engineering and Structure Dynamics. 1973, 1(3): 267-281.
 Wong H. L., Trifunac M. D. "Scattering of plane SH-waves by a semi-elliptical canyon". Earthquake Engineering and Structure Dynamics. 1974, 3(2): 157- 169.
 Trifunac M. D. "Surface motion of a semi-cylindrical alluvial valley for incident plane SH waves". Bulletin of the Seismological Society of America, 1971, 61(6): 1755- 1770.
 Wong H. L, Trifunac M. D. "Surface motion of a semi-elliptical alluvial valley for incident plane SH waves". Bulletin of the Seismological Society of America, 1974, 64(5): 1389-1408.
 Cao H., Lee V. W. "Scattering of plane SH-waves by circular cylindrical canyons with variable depth-to-width ratio". European Earthquake Engineering, 1989, 2: 29-37.
 Yuan X. M. Application research of wave function expansion method in scattering of elastic wave(D). Harbin: Institute of Engineering Mechanics, China Earthquake Administration, 1994.
 Todorovska M., Lee V. W. "Surface motion of shallow circular alluvial valleys for incident plane SH waves: analytical solution" Soil Dynamics and Earthquake Engineering, 1991, 10(4): 192- 200.
 Lee V. W., Sabban M. S., GHOSH T. "3-D surface motion of long semi-circular longitudinal canyons: incident plane P waves". European Journal of Earthquake Engineering, 1996, 9(3): 12–22.
 Liang J. W., Yan L. J., Qin D., et al. "Dynamic response of circular-arc sedimentary valley site under incident plane SV wave". China Civil Engineering Journal, 2003, 36(12): 74–82.
 Liang J. W., Yan L. J., Li J. W., et al. "Response of circular- arc alluvial valleys under incident P wave". Rock and Soil Mechanics, 2001, 22(2):138–143.
 Qi S. W. "Two patterns of dynamic responses of single- free-surface slopes and their threshold height". Chinese Journal of Geophysics, 2006, 49(2) 518- 523.
 Chai H. B., Cao P., Lin H. "Dynamic response laws of slope under vertical shear wave". Journal of Central South University (Science and Technology), 2011, 42(4):1079- 1084.
 Che W., Luo Q. F. "Seismic wave propagation in complex topography". Chinese Journal of Geotechnical Engineering, 2008, 30(9) : 1333-1337.
 Ashford S. A, Sitar N. "Analysis of topographic amplification of inclined shear waves in a steep coastal bluff". Bulletin of the Seismological Society of America, 1997, 87(3): 692–700.
 Ashford S. A, Sitar N., Lysmer J., et al. "Topographic effects on the seismic response of steep slopes". Bulletin of the Seismological Society of America, 1997, 87(3): 701–709.