An empirical relationship between seismic bedrock depth and fundamental frequency for Değirmendere (Kocaeli-Turkey)

Livaoğlu, Hamdullah; Irmak, Tahir Serkan

doi:10.1007/s12665-017-7025-7

Cited by 10 publications

(4 citation statements)

References 11 publications

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“…No.lu istasyonlar farklı sonuçlar üretmiştir. Bunun nedeninin ise sediman kalınlıklarındaki değişimden kaynaklı olduğu sonucuna varılmıştır [17]. 46 istasyon arasında, Devon dönemine ait bölünmemiş kaya ve Silüryen kayaçlarla çevrili 3417 No.lu istasyon 1747 m/s'lk Vs30 hızına sahiptir ve mühendislik kayası olarak temel alınabilir.…”

Section: Bulgularunclassified

The site effect assessment of September 26, 2019 Marmara Sea Earthquake (5.8 Mw) in the vicinity of İstanbul

Livaoğlu¹,

Sertçelik²

2021

Pamukkale J Eng Sci

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Çalışmanın amacı, 26 Eylül 2019 Marmara Denizi-İstanbul (Silivri) açıklarında meydana gelen Mw=5.8 büyüklüğündeki depremin, Türkiye Kuvvetli Yer Hareketi İstasyon ağına (TR-KYHA) ait kayıtlar ile zemin etkilerini incelemektir. Bu kapsamda 46 istasyonda kaydedilen 3 bileşen ivme verileri tepki spektrum oranları yaklaşımı kullanılarak analiz edilmiştir. Her bir kayıta ait tepki spektrum oranları hesaplanarak spektral büyütmeler ve yer baskın periyotları hesaplanmıştır. Depremin meydana getirdiği yer sarsıntısı, 150 km yarıçaplı 46 istasyonda 10 gal (cm/s 2 ) üzerinde ivme değerleri üretmiştir. Kaydedilen en yüksek yer ivme değeri deprem merkez üssünden 34.5 km uzaklıkta İstanbul, Küçükçekmece'de kurulu 3412 No.lu istasyonda 84.9 gal olarak saptanmıştır. Aletsel verileri kullanarak çözümlenen ivme kayıtlarının kesme dalga kısımları 0.3-1.5s baskın periyotlarda ve 3-12 büyütmeler arasında değişen uzak istasyonlarda (>100 km, Kocaeli, Bursa ve Balıkesir) önemli deneysel sonuçların ortaya çıkmasına yol açmıştır. Aynı zamanda, geoteknik özellikleri iyi bilenen istasyonlarda ivme kayıtlarına ait teorik yatay düşey spektral oranlar da hesaplanarak aletsel verilerle hesaplanan tepki spektrum oranları ile karşılaştırılmıştır. Bununla birlikte, 10-13 büyütme faktörlerine neden olan 1 s üzerinde baskın periyotlu uzun salınımlar gösteren bina etkilerini (Kocaeli) ve sığ litolojilerde mevcut nispeten gevşek jeolojik formasyonlarda (İstanbul, Yalova) yüksek spektral büyütmeler saptanmıştır. Elde edilen aletsel bulgular ile uzak ve yakın alanlarda ortaya çıkan zemin etkileri, sismik tehlike zararlarının azaltılmasında etkili bir rol oynayacağı düşünülmektedir.

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Section: Bulgularunclassified

The site effect assessment of September 26, 2019 Marmara Sea Earthquake (5.8 Mw) in the vicinity of İstanbul

Livaoğlu¹,

Sertçelik²

2021

Pamukkale J Eng Sci

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“…The depth dependence of velocity (x) constant is specific depends on geologic condition. This parameter could be determined by a downhole seismic survey [23]. The velocity-depth function of the sedimentary layer (2) was used to calculate x constant value.…”

Section: Sediment Layer Vs Analysismentioning

confidence: 99%

Sediment Thickness Estimation in Serpong Experimental Power Reactor Site Using HVSR Method

Ryanto

Iswanto²,

Indrawati³

et al. 2020

Jurnal Pengembangan Energi Nuklir

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A study about sediment thickness mapping was conducted in Serpong Experimental Power Reactor Site. This reactor is planned to be built in a high seismic activity area. Sediment thickness is one of many factors that could affect the site response. A high sediment deposit could amplify and prolong the earthquake waves. This condition could make the reactor building more vulnerable to seismic hazard. The sediment thickness was estimated using the microtremor HVSR method. The parameter used for sediment thickness calculation was obtained from the borehole and cross-hole seismic survey and was tested to ensure that the chosen parameter and the method were accurate. The deviation found in the borehole data was also calculated to determine the accuracy level of the calculation. The current planned location for the reactor is in a relatively low sediment deposit area with 8.8 m of thickness, however there is an area, west of the current location that might be a better location for the reactor based on the result of this study.

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“…(Table1). Data in Table 1 have been gathered from the geo-technical reports, academic studies and observational evaluations done in the area [6,7].…”

Section: Data Collectionmentioning

confidence: 99%

A Geographic Information System Designed for Disaster Management

Güven¹

2018

Anadolu Üniversitesi Bilim Ve Teknoloji Dergisi - B Teorik Bilimler

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Measures taken for disasters are typically the recovery practices after the disasters take place. However, recovery actions besides their low efficiency in Hazard Mitigation, are very expensive and conflict with sustainable development progresses. Hazard mitgation that constitutes the basis of Integrated Disaster Management regards all of the aspects of disaster management such as preparedness, emergency response, post disaster management, recovery and building resilience. Hyogo Framework for Action 2005-2015 organized by UNISDR encourages systematic actions for reducing risk and ease vulnerability. Sendai Framework for Disaster Risk Reduction 2015-2030 that is a 15-year, voluntary, non-binding agreement prioritise building resilience and enhancing disaster preparedness for effective response and to 'Build Back Better' in recovery, rehabilitation and reconstruction. This study examines the multidisciplinary data and standards for a Geographic Information System (GIS) that facilitates Hazard Mitigation and building resilience. Collecting geodata from various sources and binding them through spatial analyses is of crucial importance. The Geographic Information System to store, manage, analyze and query data should be designed to cope with multidisciplinary issues. Analyzing a region that is subject to a hazard prior to a hazard event has the potential to exhibit the weaknesses of the region and enables proposing specific measures for building resilience. Reducing vulnerability of the people living in the hazard-prone areas and rapid recovery is however only possible with putting the offered measures into practice.

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An empirical relationship between seismic bedrock depth and fundamental frequency for Değirmendere (Kocaeli-Turkey)

Cited by 10 publications

References 11 publications

The site effect assessment of September 26, 2019 Marmara Sea Earthquake (5.8 Mw) in the vicinity of İstanbul

The site effect assessment of September 26, 2019 Marmara Sea Earthquake (5.8 Mw) in the vicinity of İstanbul

Sediment Thickness Estimation in Serpong Experimental Power Reactor Site Using HVSR Method

A Geographic Information System Designed for Disaster Management

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