[1]ZHAO Fengxian,GUO Mingzhu,HU Haiqin,et al.Research on Terrain Effect of Valley Based on Digital Elevation Model[J].Journal of Seismological Research,2016,39(04):598-604.
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Research on Terrain Effect of Valley Based on Digital Elevation Model
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
39
Number of periods:
2016 04
Page number:
598-604
Column:
Public date:
2016-10-30
- Title:
- Research on Terrain Effect of Valley Based on Digital Elevation Model
- CLC:
- P315.9
- DOI:
- -
- Abstract:
- The remote sensing data is used to establish the 3D finite element valley terrain model based on digital elevation model.When inputting different seismic waves,the dynamic response characteristic of different monitoring point of valley terrain is studied.The numerical simulation results show that the topographic effect has the great influence on the amplitude of ground motion,and the amplitude increase with the increasing of elevation.The acceleration peak at the top of valley is greater than at the bottom of the valley,the topographic amplification effect on the top is obvious than that at the bottom.Meanwhile,there exit the traveling wave effect of earthquake wave,it perform that the ground motion on the top of valley present hysteretic nature relative to that at the bottom of the valley.The valley topography has the filtering effect on high-frequency(>10 Hz)of seismic wave,and the amplification effect on energy of low-frequency of seismic wave(2～5 Hz).The numerical simulation results about the different span of valley terrain on the site terrain effect show that,when the span reduces,the amplification effect of peak acceleration becomes more obvious.The terrain effect caused by the surface tends to be gentle with the increase of the span.
- References:
- -
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Last Update:
2016-10-30