This is NKS NKS-R NKS-B News Seminars NKS Reports Phantom Library

You are here: Homepage NKS Reports View document

List all reports List all NKS-R reports List all NKS-B reports Search Reports  
NKS Programme Area:NKS-R
Research Area:Risk analysis and probabilistic methods
Report Number:NKS-394
Report Title:Modelling as a Tool to Augment Ground Motion Data in Regions of Diffuse Seismicity – Final report
Activity Acronym:AddGROUND
Authors:Ludovic Fülöp, Vilho Jussila, Björn Lund, Billy Fälth, Peter Voss, Jari Puttonen, Jouni Saari, Pekka Heikkinen,
Abstract:De-aggregation of probabilistic hazard assessment (PSHA) results show that the dominating source of vibrations with engineering significance to NPP safety is from mid-magnitude earthquakes located at close distances to the plant. This region is called the “near-field” and is known for its particularities when compared to “far-field”. For example, significant duration of the ground motions is shorter, corresponding to S-wave and surface wave arrivals; there are distinctive high velocity peaks in the ground motions and vertical shaking components may exceed horizontal components. These particularities are known to have design consequences, but are often overlooked by engineering codes. In Fennoscandia, near-field observations of larger magnitude (M>3) earthquakes are missing, and modelling is the only way to supplement the existing empirical data underspinning the attenuation equations in the PSHA studies. During the project year 2015, we confirmed the near-source effect in small magnitude earthquake recordings in Finland and developed modeling skills and tools to generate synthetic, near-field accelerograms starting from process of the fault rupture. Within this report (2016), we describe the modelling techniques and compare the modelling outcomes for Mw=5.5 earthequakes with ground motion prediction equations GMPE’s developed for stable continental regions. Five cases were analyzed in order to explore the capabilities of ground motion simulation tools. In the five cases, the varied parameters were depth of the source, dip angle of the fault and dynamic properties of the fault. The models were developed in COMPSYN in 3DEC. By these comparisons we highlight the potentials and limitations of modelling to support empirical observations.
Keywords:Nuclear power plant safety, earthquake, near-field effects, fault source modeling
Publication date:21 Aug 2017
ISBN:ISBN 978-87-7893-482-6
Number of downloads:1698
Download:pdf NKS-394.pdf
Contact NKS   NKS Sekretariatet
Boks 49
DK-4000 Roskilde
  Telephone +45 46 77 40 41
E-mail: nks@nks.org 
 

Address for visitors
Directions and map

Privacy policy

Cookie policy

 

Website last modified: 14 March 2024