A Study Depending on the Probabilistic Seismic Hazard Analyses for Design Spectrum Parameters

Year 2017, Volume: 28 Issue: 4, 8077 - 8103, 01.10.2017

Özkan Kale

https://doi.org/10.18400/tekderg.331837

Cited By: 2

Abstract

Within the scope of this study, design spectrum parameters
(constant acceleration region corner periods and site factors) are proposed, depending
on probabilistic seismic hazard analyses conducted in a region located in a
part of the North Anatolian Fault Zone. The outcomes are obtained for different
site conditions and return periods. Two different seismic source models which
are areal source, and fault and gridded seismic source models are used for
probabilistic seismic hazard analyses. The ground-motion characterization is
handled by selecting the ground-motion prediction equations that reflect well
the seismic excitations around the study region. The computation of constant
acceleration region corner periods and site factors are based on the empirical
relationships that depend on the PGA or spectral accelerations at T = 0.2 s and
1.0 s for rock sites.

Keywords

Probabilistic seismic hazard analysis, ground-motion prediction equation, design spectrum, control periods, site factors

Tasarım Spektrumu Parametreleri için Olasılıksal Sismik Tehlike Analizlerine Bağlı Bir Çalışma

Abstract

Bu
çalışma kapsamında tasarım spektrumu parametreleri (sabit ivme bölgesi köşe
periyotları ve zemin faktörleri) Kuzey Anadolu Fay Hattı üzerinde seçilen bir
bölge için yapılan olasılıksal sismik tehlike analizlerine bağlı olarak önerilmiştir.
Sonuçlar farklı zemin türleri ve farklı dönüş periyotlarına göre elde
edilmiştir. Olasılıksal sismik tehlike analizleri için alansal kaynak ve fay ve
mekansal düzleştirilmiş kaynak model olmak üzere iki farklı sismik model
kullanılmıştır. Yer hareketi karakterizasyonu bölgedeki sismik aktiviteyi en
iyi şekilde temsil edebilecek yer hareketi tahmin denklemlerinin seçilmesiyle
yapılmıştır. Sabit ivme bölgesi köşe periyotları ve zemin faktörlerinin hesabı
PGA veya T = 0.2 s ve 1.0 s’ deki kaya zemin spektal ivme değerlerine bağlı
olarak üretilen ampirik bağıntılara dayanmaktadır.

Keywords

Olasılıksal sismik tehlike analizi, yer hareketi tahmin denklemi, tasarım spektrumu, kontrol periyotları, zemin faktörleri

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