Strong motion attenuation relationship for Turkey—a different perspective

Kayabalı, Kamil; Beyaz, Turgay

doi:10.1007/s10064-010-0335-6

Cited by 9 publications

(2 citation statements)

References 12 publications

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“…In this study, the attenuation of the acceleration at the main rock is used. Attenuation relations were developed for Turkey by İnan et al (1996), Aydan (2001), Gülkan and Kalkan (2002), Kalkan and Gülkan (2004), Ulusay et al (2004), Beyaz et al (2004), Yunatcı (2010), Akkar and Çağnan (2010), Kayabalı and Beyaz (2011), and Akkar et al (2014). In Figure 4, ground acceleration values for Mw = 7.4 and various distances are provided, which are computed by using the previously given attenuation relations.…”

Section: Selection Of Attenuation Relationmentioning

confidence: 99%

Probabilistic earthquake hazard assessment for Ankara and its environs

Özmen

Erkan

2014

Turkish J Earth Sci

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IntroductionAnkara is situated in the Central Anatolia Region (Figure 1) with a population of 4,842,136 in 2012, which is equivalent to 6.4% of the total population of Turkey. It is the second largest city in Turkey. There are 25 districts in Ankara and 96% of Ankara's population lives within the investigated area.The city is surrounded by 4 main fault lines: the North Anatolia Fault Zone (NAF) in the north, the Ezinepazarı Fault in the east, the Tuzgölü Fault Zone in the southeast, and the İnönü-Eskişehir Fault Zone in the west and south-west. These faults have the potential to create an earthquake with magnitudes of greater than 7.0 on the Richter scale (M ≥ 7.0). This is a very important seismic threat to Ankara. In addition to these main faults, there are numerous active faults within the province and its surroundings, including the city centre. These additional active faults can cause small-to medium-scale earthquakes (5.0 < M < 6.0) with possible losses.Few people believe that there is a seismic hazard in Ankara as the city has not experienced large devastating earthquakes in recent history. However, the active fault lines surrounding the city clearly pose a substantial threat, which this study set out to explore in detail. The Van earthquake of 23 October 2011 resulted in a strong political will for 'urban transformation' . It is also well known that most of the current building stock in Turkey is highly vulnerable to earthquakes and needs to be reconstructed or retrofitted. The probabilistic results published in this study can also be used by policymakers to prepare efficient hazard mitigation plans for Ankara. This paper provides background information on existing studies and details of the region. Next, the methodology is presented. Results and suggestions conclude the paper.Ankara is situated in a fourth-degree earthquake hazard zone [i.e. expected peak ground acceleration (PGA) is 0.1-0.2 g] according to the current official seismic hazard zonation map of Turkey, which was published in 1996. During the preparation of this map, Turkey was divided into 17 source regions. Using a probabilistic approach, the map was produced to show any 90% nonexceedance probability of PGA over a 50-year period.

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Section: Selection Of Attenuation Relationmentioning

confidence: 99%

Probabilistic earthquake hazard assessment for Ankara and its environs

Özmen

Erkan

2014

Turkish J Earth Sci

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“…Recent studies have been focused on determining the most appropriate residential areas and designing earthquake-resistant structures (Bartlett and Youd, 1995;Hamada et al, 1996;Seed, 1979;Ishihara and Yoshimine, 1992;O'Rourke and Pease, 1992;Stewart et al, 2002;Stewart and Whang, 2003;Zhang et al, 2004;Kayabali and Beyaz, 2011). The selection of residential areas is particularly important in Turkey, where earthquakes occur frequently.…”

Section: Introductionmentioning

confidence: 99%

Potential Settlement Due to Seismic Effects in the Residential Area of Ilgin (Konya, Turkey)

Özdemir

Nalbantçılar

2016

Earth sci. res. j.

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Ilgin lies on newly formed, loose, granular deposits, and there is substantial risk for surface liquefaction and foundation settlements due to the seismic effects resulting from groundwater close to the surface. This study evaluates potential settlement due to seismic effects in the residential areas of Ilgin using the Standard Penetration Test (SPT) performed on 45 geotechnical bores. In Turkey, where earthquakes occur frequently, the selection of residential areas is of great importance. In this research, the number of settlements was calculated considering an earthquake having a Local Magnitude of 6 (i.e., ML ≥ 6.0 and a ≥ 0.4 g) under a 0.4 g seismic force, and a potential settlement map of the residential area was prepared. The amount of settlement exceeds 20 cm at locations near Ilgin Lake and in the northern section of Ilgin residential areas; downtown, the settlement ranges from 10-20 cm. The settlements presented here exceed the allowable threshold limits for structures constructed using adobe and brick in this district. Thus, improvements to minimise earthquake-induced damages are required for structures in Ilgin. Moreover, the selection of new residential areas, along with the proper design of the structures before construction, should be examined further to avoid ground liquefaction and structure damage due to settlement.La localidad de Ilgin está ubicada sobre depósitos recién formados, granulares y no compactos, por lo que existe un riesgo sustancial de licuefacción de la superficie y la creación de asentamientos o deslizamientos debido a los efectos sísmicos resultantes del agua subterránea poco profunda. Este artículo evalúa el potencial de asentamiento debido a los efectos sísmicos en las áreas residenciales de Ilgin a través del Ensayo de Penetración Estándar (SPT, en inglés) realizado en 45 perforaciones geotécnicas. En Turquía, donde los terremotos ocurren frecuentemente, la selección de áreas residenciales es de gran importancia. En esta investigación, se calculó el número de asentamientos ante un terremoto con Magnitud Local (ML) de 6 y con una fuerza sísmica de 0.4 g para preparar un mapa de asentamientos en el área residencial. La cantidad de asentamientos supera los 20 centímetros en lugares cercanos al lago Ilgin y en la sección norte del área residencial; en el centro, los rangos de asentamiento van de 10 a 20 cm. Los asentamientos presentados exceden los límites de lo permitido para estructuras construidas en adobe y ladrillo en este distrito. Por esto, se requieren mejoras para minimizar los daños inducidos por terremotos en las estructuras de Ilgin. Además, la selección de nuevas áreas residenciales, junto con el diseño apropiado de las estructuras antes de la construcción, debe ser revisado atentamente para evitar la licuefacción del suelo y el daño de las estructuras debido al asentamiento.ABSTRACT RESUMEN

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Slope Stability Problems and Back Analysis in Heavily Jointed Rock Mass: A Case Study from Manisa, Turkey

Akin

2012

Rock Mech Rock Eng

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Strong motion attenuation relationship for Turkey—a different perspective

Cited by 9 publications

References 12 publications

Probabilistic earthquake hazard assessment for Ankara and its environs

Probabilistic earthquake hazard assessment for Ankara and its environs

Potential Settlement Due to Seismic Effects in the Residential Area of Ilgin (Konya, Turkey)

Slope Stability Problems and Back Analysis in Heavily Jointed Rock Mass: A Case Study from Manisa, Turkey

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