Vertical design spectra may be developed in a probabilistic seismic hazard assessment
(PSHA) by computing the hazard using vertical ground motion prediction equations
(GMPEs), or using a vertical-to-horizontal spectral acceleration (V/H) ratio GMPEs to scale
the horizontal spectrum that was developed using the results of horizontal component PSHA.
The objective of this study is to provide GMPEs that are compatible with regional ground
motion characteristics to perform both alternatives. GMPEs for the V/H ratio were developed
recently by Gü / lerce and Abrahamson (2011) using NGA-W1 database. A strong motion
dataset consistent with the V/H ratio model parameters is developed by including strong
motion data from earthquakes occurred in Turkey with at least three recordings per
earthquake. The compatibility of GA2011 V/H ratio model with the magnitude, distance, and
site amplification scaling of Turkish ground motion dataset is evaluated by using inter-event
and intra-event residual plots and necessary coefficients of the model is adjusted to reflect
the regional characteristics. Analysis of the model performance in the recent moderate-tolarge
magnitude earthquakes occurred in Turkey shows that the Turkey-Adjusted GA2011
model is a suitable candidate V/H ratio model for PSHA studies conducted in Turkey. Using
the same dataset, a preliminary vertical ground motion prediction equation for Turkey
consistent with the preliminary vertical model based on NGA-W1 dataset is developed.
Proposed preliminary model is applicable to magnitudes 5-8.5, distances 0-200 km, and
spectral periods of 0-10 seconds and offers an up-to-date alternative to the regional vertical
GMPEs proposed by Kalkan and Gü / lkan (2004).
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12615403/index.pdf |
| Date | 01 January 2013 |
| Creators | Akyuz, Emre |
| Contributors | Gulerce, Zeynep |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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