Finite Fault Modeling of Strong Ground Motions Using a Hybrid Deterministic-Stochastic Approach

2005 ◽  
Vol 95 (1) ◽  
pp. 225-240 ◽  
Author(s):  
F. Pacor ◽  
G. Cultrera ◽  
A. Mendez ◽  
M. Cocco
Keyword(s):  
Ground Motions ◽  
Stochastic Approach ◽  
Fault Modeling ◽  
Strong Ground Motions ◽  
Finite Fault ◽  
Strong Ground

Synthesis of Strong Ground Motions at Two Dam Sites during the Great Wenchuan Earthquake

2013 ◽  
Vol 353-356 ◽  
pp. 1934-1940
Author(s):  
Hai Ming Liu ◽  
Xia Xin Tao ◽  
Li Yuan Wang ◽  
Wei Jiang
Keyword(s):  
Wenchuan Earthquake ◽  
Peak Ground Acceleration ◽  
Ground Motions ◽  
Source Spectrum ◽  
Ground Acceleration ◽  
Mean Values ◽  
Strong Ground Motions ◽  
Finite Fault ◽  
Source Models ◽  
Strong Ground

The ground motions on two dam sites during the great Wenchuan earthquake with magnitude 8.0, motions are synthesized from 30 finite fault based hybrid source models and inversed regional parameters of source spectrum and motion attenuation. The results show that the peak ground acceleration values are less than those estimated directly from the Intensities Ⅹ and Ⅺ at the two sites, with mean values 259 and 716 gals. The motion at Shapai is much stronger than that at Zipingpu, and the spectrum is also wider than the latter, but the corresponding duration is shorter during the earthquake.

scholarly journals Broadband Strong-Motion Prediction for Future Nankai-Trough Earthquakes Using Statistical Green’s Function Method and Subsequent Building Damage Evaluation

2021 ◽  
Vol 11 (15) ◽  
pp. 7041
Author(s):  
Baoyintu Baoyintu ◽  
Naren Mandula ◽  
Hiroshi Kawase
Keyword(s):  
Green’S Function ◽  
Green's Function ◽  
Nankai Trough ◽  
Ground Motions ◽  
Building Damage ◽  
Steel Buildings ◽  
Ground Acceleration ◽  
Attenuation Relations ◽  
Strong Ground Motions ◽  
Strong Ground

We used the Green’s function summation method together with the randomly perturbed asperity sources to sum up broadband statistical Green’s functions of a moderate-size source and predict strong ground motions due to the expected M8.1 to 8.7 Nankai-Trough earthquakes along the southern coast of western Japan. We successfully simulated seismic intensity distributions similar to the past earthquakes and strong ground motions similar to the empirical attenuation relations of peak ground acceleration and velocity. Using these results, we predicted building damage by non-linear response analyses and find that at the regions close to the source, as well as regions with relatively thick, soft sediments such as the shoreline and alluvium valleys along the rivers, there is a possibility of severe damage regardless of the types of buildings. Moreover, the predicted damage ratios for buildings built before 1981 are much higher than those built after because of the significant code modifications in 1981. We also find that the damage ratio is highest for steel buildings, followed by wooden houses, and then reinforced concrete buildings.

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