Numerical simulation of the strong ground motion characteristics

• Autorzy: Narayan, J.
• Języki publikacji: EN

Abstrakty

EN

This paper presents the implementation of point shear dislocation source into 2D parsimonious finite-difference computational grid for simulation of strong ground motion (SGM) characteristics. The procedure used for computing dislocations on the fault plane is identical to both well known kinematic and dynamic models, since dislocation on the fault was computed by solving the equation of motion taking into account the stress drop and the shear strength of the fault. Parsimonious scheme was adopted instead of standard staggered grid scheme since it requires lesser computational memory. The computed numerical radiation patterns of strike-slip, dip-slip and explosive type sources are in good agreement with the respective analytical radiation patterns. The effects of source parameters were studied and the results are in concordance with the existing empirical relations. The simulated results show that impedance decrease, resonance, thickness and geometry of the basin control amplitude amplification and signal duration. The responses for different basin geometry revealed that focusing effect caused by narrow and deep basin causes tremendous increase of amplitude and duration.

Słowa kluczowe

EN

point shear dislocation source; strong ground motion; numerical simulation

• Czasopismo: Acta Geophysica Polonica
• Rocznik: 2002
• Tom: Vol. 50, nr 2
• Strony: 167-178
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Narayan, J.

• Department of Earthquake Engineering, University of Roorkee, Roorkee, India,