Simulation of Near Field Strong Ground Motions at Tombak Site in Iran Using Hybrid Method

Abstract eng:
The main objective of this paper is to simulate the near fault strong motion records. Due to uncertainty and unavailability of strong recorded ground motion in near field and also existence of some important structures such as the massive LNG storage plants near to fault, simulation of ground motion has been carried out using the hybrid method proposed by Mavroeidis and Papageorgiou (2003) and stochastic model of Boore (2003) for simulating reliable time histories for Tombak region in south-eastern part of Iran. The ground motion spectrum is generated by Atkinson and Boore model (1995). Firstly, macro-source parameters characterizing the whole source area, i.e., global source parameters such as fault length, fault width, rupture area, average slip on the fault plane and etc., are estimated; secondly, slip distributions characterizing heterogeneity or roughness on the fault plane, i.e., local source parameters are reproduced by hybrid slip model; finally, the finite fault source model, which is developed based on the global and local source parameters, is combined with the stochastic method and also the impulsive character of near fault ground motion has been incorporated. Then, the response of site under simulated ground motion has been studied by conducting one dimensional ground response analysis. Based on the present study bed rock acceleration and ground surface acceleration of the site have been established. Comparisons show good agreements and confirm that selected source parameters were satisfactory reliable. The results can be used in hazard analysis of specific sites in the region under study particularly for performance analysis of structures.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket