scholarly journals Strong earthquake motion estimates for three sites on the U.C. San Diego campus

2002 ◽  
Author(s):  
S Day ◽  
M Doroudian ◽  
A Elgamal ◽  
S Gonzales ◽  
F Heuze ◽  
...  
Keyword(s):  
Strong Earthquake ◽  
San Diego ◽  
Earthquake Motion

Strong earthquake motion and site conditions: Hollywood

1970 ◽  
Vol 60 (4) ◽  
pp. 1271-1289 ◽  
Author(s):  
C. M. Duke ◽  
J. E. Luco ◽  
A. R. Carriveau ◽  
P. J. Hradilek ◽  
R. Lastrico ◽  
...  
Keyword(s):  
Strong Earthquake ◽  
Dynamic Models ◽  
Free Field ◽  
Structural Response ◽  
Site Conditions ◽  
Field Amplification ◽  
Earthquake Motion ◽  
Fourier Spectra ◽  
Earthquake Accelerograms ◽  
East West

abstract An investigation was made to determine the feasibility of isolating the effects of site conditions on strong earthquake accelerograms. The set of accelerograms recorded simultaneously in 1952 at the roof, in the basement and on the ground outside the 14-story Hollywood Storage Building was chosen for analysis. Fourier spectra were computed for the two horizontal components at each of the three recording places and were used after smoothing to compute the ratios of spectra for adjacent points. Dynamic models of the subsurface conditions, the foundation and the building were established. Certain of the spectral ratios were also determined theoretically. The primary result is the development of a method of isolating effects of site conditions in Fourier spectra of accelerograms. Good theoretical checks were obtained on soil-structure interaction and structural response in the east-west direction. The absence of bedrock accelerograms prevented the obtaining of a theoretical check on free-field amplification, although plausible bedrock Fourier spectra were obtained. The subsurface model should be useful for further analyses.

Analysis of Typical Example and Genesis of Landslide Triggered by Wenchuan Earthquake in China

2012 ◽  
Vol 238 ◽  
pp. 886-889
Author(s):  
Jin Yu Dong ◽  
Zi Li Li ◽  
Zhi Quan Huang ◽  
Ji Hong Yang ◽  
Guo Xiang Yang
Keyword(s):  
Wenchuan Earthquake ◽  
Fracture Zone ◽  
Strong Earthquake ◽  
Slope Failure ◽  
Failure Process ◽  
Stable Condition ◽  
Geological Structure ◽  
Earthquake Motion ◽  
Incipient Fault

As the main geohazard triggered by Wenchuan earthquake, landslide is widely distributed. It caused many people lost their lives and incipient fault. This paper analyzes the genesis of these landslides from the aspects of geomorphy, geological structure of slope body, rock characters, earthquake motion, stable condition of slope, weathering effect and stream action. Strong earthquake motion near the fracture zone and geological structure of slope body are the main reasons caused the slope failure. Take Wangjiayan landslide as the typical example, the genesis of earthquake-induced landslide is analyzed. Strong earthquake motion near the fracture zone and the extroversion structural surfaces are the main reasons caused the slide, and great slope and instable state of slope can also promote the slop failure. Failure process of slope is also analyzed.

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