We proposed a procedure to establish a model of dynamic fault rupturing for predicting strong ground motions under the constraints by empirical relations among fault parameters of the surface and subsurface faults such as the fault length, the dislocation on the surface, the ruptured area, the seismic moment, and the short-period level of the acceleration source spectrum. As an example, given the depth of the seismogenic layer 4 to 18 km deep and the earthquake magnitude of 7.2, we evaluated 14 model parameters of the dynamic fault rupturing. We confirmed that the results of the dynamic fault rupturing simulation based on this model satisfied the empirical relations adopted prior to the simulation.
A conventional “recipe” for strong ground motion prediction has been applied to the seismic fault (deep fault; located within seismogenic layer). In order to perform assessments of strong ground motions and permanent displacements at sites very close to the fault trace, we proposed the method of modeling that takes the entire ruptured fault from the ground surface to the seismic fault into account. Our approach was validated by the simulation of observed records obtained at stations very close to the fault trace of the mainshock of the 2016 Kumamoto Japan, earthquake (Mw7.1). Also, through the ground motion assessment performed for a hypothetical strike-slip fault with a 90[Formula: see text] dip angle, we found that adding the shallow fault had virtually no effect on acceleration time history, but it had a clear effect on the fault-parallel component of velocity and displacement time histories in the area close to the fault trace.
Three dimensional ( 3D ) seismic isolation devices have been deveioped to use fbr the base isolation system of the heavy bui璽 ding like a nuclear reactor bui[ ding . The developed seismic isolation system is composed ofrolling seal type air springs and the hydraulic type springs with rocking suppression system fbr vertical base isoration device . In horizontal direction , the same laminated rubber bearings are used as hor{ zontal isoiation device for these systems . Ihe performances and the applicability have already been evaluated by the technical feasibility tests and perforniance tests for each system , In this study , it was evaluated tha 岫 e perforrnance of the 3D base isolation system with rolling seal type air springs combin ¢ d With hydraulic rocking suppressien devices . In血 is paper , the resu 〔 ts ofper 露 b ance tests fbr hydraulic rocking suppression system wi 且 l be repor [ ed .
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.