Simulation of near source ground motion and its characteristics

✍ Scribed by S Suzuki; K Asano

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 958 KB
• Volume: 20
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/s0267-7261(00)00044-0

✦ Synopsis

It is fact that the severe ground motions of shear waves have a strong effect on the dynamic behavior of buildings and civil structures. We simulate near source strong motions of a pure shear wave and synthesize small motions, using the parameters based on the recorded accelerograms at the site that is regarded as a base rock in the Osaka basin, Japan. By making use of a stochastic technique, we can easily introduce higher frequency contents in the motions and apply the technique to the synthesis of small waves regarding as a green function. We also introduce to the analysis the useful relationships among the time duration T d , the seismic moment M 0 , the corner frequency f c and the high cutoff frequency f max which were regressed by a simple representation scheme. Considering two active faults that may affect severe damage on buildings and civil structures, we try to predict strong ground motions in Osaka basin and show the characteristics of them.