Ground Motion Characterization for Vertical Ground Motions in Turkey—Part 2: Vertical Ground Motion Models and the Final Logic Tree

Gülerce, Zeynep
The main objectives of this study are: (1) to choose the vertical ground motion models (GMMs) that are consistent with the magnitude, distance, depth, and site amplification scaling of the updated Turkish ground motion database, and (2) to combine the vertical GMMs with the V/H ratio models selected in the accompanying paper (Alipour et al. in Pure Appl Geophys 1-22, 2019) to provide the ground motion characterization logic tree for the vertical ground motion component in Turkey. Four global vertical GMMs [proposed by Bozorgnia and Campbell in Earthq Spectra 32(2):979-1004, 2016b; Stewart et al. in Earthq Spectra 32(2):1005-1031, 2016; Gulerce et al. in Earthq Spectra 33(2):499-528, 2017 using the NGA-West 2 database; and cagnan et al. in Bull Earthq Eng 15(7):2617-2643, 2017 model based on the RESORCE database] are selected, and the model predictions are compared with the actual data in the updated Turkish ground motion dataset using the analysis of the residuals. Analysis results showed that the magnitude scaling of cagnan et al. (2017) model and the depth scaling of the Bozorgnia and Campbell (2016b) model are inconsistent with the Turkish strong motion database. Additionally, small-magnitude (SM) scaling of Stewart et al. (2016) and Gulerce et al. (2017) GMMs should be modified for a better fit with the Turkish dataset. Trellis plots of SM-modified Stewart et al. (2016) and SM-modified Gulerce et al. (2017) vertical GMMs and selected V/H ratio models multiplied with NGA-West 2 and Turkey (TR)-adjusted horizontal NGA-West 1 models [Gulerce et al. in Earthq Spectra 32(1):75-100, 2016] are used to determine the logic tree weights for the proposed vertical ground motion characterization logic tree for Turkey.
Pure and Applied Geophysics


Ground Motion Characterization for Vertical Ground Motions in Turkey—Part 1: V/H Ratio Ground Motion Models
Alipour, N.A.; SANDIKKAYA, MUSTAFA ABDULLAH; Gülerce, Zeynep (Springer Science and Business Media LLC, 2020-05-01)
Two approaches are used to develop the vertical design spectra in probabilistic seismic hazard assessment (PSHA): (i) performing PSHA for the vertical component using vertical ground motion models (GMMs), and (ii) utilizing the V/H ratio GMMs to scale the horizontal spectrum during or after the hazard calculations for the horizontal component. This study intends to develop a new framework for building a vertical ground motion logic tree that combines both vertical and V/H ratio GMMs in the PSHA analysis. Fo...
Time domain Gauss-Newton seismic waveform inversion in elastic media
Sheen, Dong-Hoon; Tuncay, Kağan; Baag, Chang-Eob; Ortoleva, Peter J. (Oxford University Press (OUP), 2006-12-01)
We present a seismic waveform inversion methodology based on the Gauss-Newton method from pre-stack seismic data. The inversion employs a staggered-grid finite difference solution of the 2-D elastic wave equation in the time domain, allowing accurate simulation of all possible waves in elastic media. The partial derivatives for the Gauss-Newton method are obtained from the differential equation of the wave equation in terms of model parameters. The resulting wave equation and virtual sources from the recipr...
Relationships between Felt Intensity and Recorded Ground-Motion Parameters for Turkey
Bilal, Mustafa; Askan Gündoğan, Ayşegül (Seismological Society of America (SSA), 2014-02-01)
In this paper, empirical relationships between modified Mercalli intensity (MMI) and recorded peak ground-motion parameters are developed for Turkey. Strong ground motion data from moderate-to-large earthquakes are employed along with the corresponding MMI information inferred from isoseismal maps and earthquake damage reports. Linear least-squares regression technique is used to derive the following simple relationships between MMI and peak ground acceleration (PGA), peak ground velocity (PGV), and pseudos...
On Baseline Corrections and Uncertainty in Response Spectra for Baseline Variations Commonly Encountered in Digital Accelerograph Records
Akkar, Dede Sinan; Boore, David M. (Seismological Society of America (SSA), 2009-06-01)
Most digital accelerograph recordings are plagued by long-period drifts, best seen in the velocity and displacement time series obtained from integration of the acceleration time series. These drifts often result in velocity values that are nonzero near the end of the record. This is clearly unphysical and can lead to inaccurate estimates of peak ground displacement and long-period spectral response. The source of the long-period noise seems to be variations in the acceleration baseline in many cases. These...
Broadband Ground Motion Simulation Within the City of Düzce (Turkey) and Building Response Simulation
Ozmen, Ekin; Karim Zadeh Naghshineh, Shaghayegh; Askan, Aysegul (Springer Science and Business Media LLC, 2020-05-01)
In areas with significant seismic activity and insufficient seismic networks, simulated ground motions are required for both seismic hazard and engineering analyses. One important task is evaluating the efficiency of the simulated records in building response estimation. In this study, a hybrid ground motion simulation framework is presented to obtain broadband ground motion time histories of a past major earthquake in Düzce (Turkey). The hybrid ground motion simulation framework presented herein is a combi...
Citation Formats
Z. Gülerce and M. A. SANDIKKAYA, “Ground Motion Characterization for Vertical Ground Motions in Turkey—Part 2: Vertical Ground Motion Models and the Final Logic Tree,” Pure and Applied Geophysics, pp. 2105–2123, 2020, Accessed: 00, 2020. [Online]. Available: