Soil characterization of Bornova Plain (Izmir, Turkey) and its surroundings using a combined survey of MASW and ReMi methods and Nakamura’s (HVSR) technique

Pamuk, Eren; Özdağ, Özkan Cevdet; Akgün, Mustafa

doi:10.1007/s10064-018-1293-7

Cited by 20 publications

(12 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To do so we used the site_amp and nrattle computer program, a modi ed version of C. Mueller's program rattle by R. B. Herrmann (part of the SMSIM computer codes of Boore 2003). We prototyped shear-wave velocities and attenuation as a function of depth from those pro les provided by Pamuk et al (2018Pamuk et al ( , 2018b and computed ampli cations in the frequency-domain. In these velocity models, engineering bedrock (V s > 760 m/s) depth changes from 200 to 400 m in the Bornova basin while the seismic bedrock (V s > 3000 m/s) ranges between 1200 to 1400 m. The velocity pro les S2, S3, S5 and the deeper one S4, with greater proximity to the 3519 station, are adopted from Pamuk et al (2018).…”

Section: Site Ampli Cationsmentioning

confidence: 99%

The 30 October 2020 Samos (Eastern Aegean Sea) Earthquake: effects of source rupture, path and local-site conditions on the observed and simulated ground motions

Akinci

Cheloni

Dindar

2021

Preprint

View full text Add to dashboard Cite

On 30 October 2020 a MW 7.0 earthquake occurred in the eastern Aegean Sea, between the Greek island of Samos and Turkey’s Aegean coast, causing considerable seismic damage and deaths, especially in the Turkish city of Izmir, approximately 70 km from the epicenter. In this study, we provide a detailed description of the Samos earthquake, starting from the fault rupture to the ground motion characteristics. We first use Interferometric Synthetic Aperture Radar (InSAR) and Global Positioning System (GPS) data to constrain the source mechanisms. Then, we utilize this information to analyze the ground motion characteristics of the mainshock in terms of peak ground acceleration (PGA), peak ground velocity (PGV), and spectral pseudo-accelerations. Modelling of geodetic data shows that the Samos earthquake ruptured a NNE-dipping normal fault located offshore north of Samos, with up to 2.5-3 m of slip and an estimated geodetic moment of 3.3 ⨯ 1019 Nm (MW 7.0). Although low PGA were induced by the earthquake, the ground shaking was strongly amplified in Izmir throughout the alluvial sediments. Structural damage observed in Izmir reveals the potential of seismic risk due to the local site effects. To better understand the earthquake characteristics, we generated and compared stochastic strong ground motions with the observed ground motion parameters as well as the ground motion prediction equations (GMPEs), exploring also the efficacy of the region-specific parameters which may be improved to better predict the expected ground shaking from future large earthquakes in the region.

show abstract

Section: Site Ampli Cationsmentioning

confidence: 99%

The 30 October 2020 Samos (Eastern Aegean Sea) Earthquake: effects of source rupture, path and local-site conditions on the observed and simulated ground motions

Akinci

Cheloni

Dindar

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Figure 10a shows the three-dimensional topographic map of Bornova Plain and its surrounding. This map is modified from the work of Pamuk et al (2019). The distribution of the average shear wave velocity in the top 30 m depth (V s30 ) is also shown on the 3D map.…”

Section: Geology Of the Damage Areamentioning

confidence: 99%

A survey of damage observed in Izmir due to 2020 Samos-Izmir earthquake

2021

View full text Add to dashboard Cite

An earthquake of magnitude 6.9 hit the city of Izmir (Turkey) on 30 October 2020, resulting in 117 deaths (in Turkey) and considerable economic losses. The earthquake also triggered a tsunami. Following the earthquake, field surveys are being conducted in a Covid-secure way to study and document the damages caused. The earthquake caused significant damages to residential buildings mainly located in the district of Bayrakli and Bornova. However, no damages were observed in railway and roadway bridges or tunnels and that helped the rescue operations. The damages were mainly structural which included the so-called pancake collapse (where the entire building collapsed) and soft storey type collapse (weak storey characterised with weak columns collapsed), and in some cases, only the ground floor completely collapsed. Due to the proximity of the epicentre and the geology of the area, it seemed that the ground motions were amplified. This technical note provides a summary of the seismological and recorded ground characteristics of the earthquake together with the lessons learnt.

show abstract

“…Deprem-zemin ortak davranış özelliklerinin dinamik koşullar dikkate alınarak araştırılabilmesi için en güvenilir yaklaşım doğrudan deprem verilerinin kullanılmasıdır [6]. Bu çalışmada yerel zemin etkilerinin belirlenmesinde yaygın olarak kullanılan Klasik Spektral Oran (SSR) [6,7] ve Yatay/Düşey Spektral Oran (HVSR) [6,8,[9][10][11][12] yöntemleri kullanılmıştır. Bu motivasyon ile; Erzurum ve çevresinde konumlanmış AFAD (9 adet) ve Atatürk Üniversitesi Deprem Araştırma Merkezi (ATA-DAM) (1 adet) tarafından işletilen toplam 10 adet ivme-ölçer tarafından 2013-2017 yılları arasında en az 3 istasyon tarafında kayıt edilen ve en az 3.5 büyüklüğündeki 17 deprem kullanılmıştır (Tablo 1).…”

Section: Erzurum Ve çEvresi Yerel Zemin Etkilerinin Ssr Ve Hvsr Yönteunclassified

Section: Erzurum Ve çEvresi Yerel Zemin Etkilerinin Ssr Ve Hvsr Yöntemleri Kullanılarak Araştırılması Investigation Of the Local Soil Effunclassified

“…Yapı ve zemin periyodunun yakın/aynı olduğu durumlarda titreşim genliği en yüksek değere ulaşarak yapıyı yıkıma zorlar. Rezonans hesabı için farklı değişkenlere bağlı birçok ampirik bağıntı bulunmaktadır [12]. En basit hali ile kat adetine (N) bağlı olarak periyot hesabı için (1) numaralı bağıntı kullanılabilinir [33].…”

Section: Veri Ve Yöntemunclassified

See 1 more Smart Citation

Erzurum ve Çevresi Yerel Zemin Etkilerinin SSR ve HVSR Yöntemleri Kullanılarak Araştırılması

Özer¹

2019

deufmd

View full text Add to dashboard Cite

Öz Erzurum ili ve çevresinde, farklı zemin türleri üzerinde yer alan 10 adet ivme-ölçerler ile kaydedilen 17 adet deprem ile Standart spektral oran (SSR) ve Yatay/Düşey Spektral oran (HVSR) yöntemleri kullanılarak çalışma alanının deprem-zemin ortak davranış özellikleri araştırılmıştır. Zeminlerin jeolojik ve jeoteknik özelliklerine göre elde edilen farklı büyütme değerleri belli frekans aralıkları için incelenmiştir. Şehir merkezi ve yakın çevresini kapsayan alanda Kuvaterner alüvyonda konumlanmış Merkez, Merkez_SS, Ilıca ve Pasinler istasyonlarında düşük frekanslarda yüksek büyütmeler tespit edilmiştir. Bu birimlerde zemin hakim frekansı 0.5 Hz ile 1.0 Hz (1-2 sn) arasında değiştiğinden olası bir deprem durumunda 10 ile 20 kat arasındaki yapılarda rezonans durumu ortaya çıkabilir. Alüvyon birimler üzerine kurulmuş şehir merkezi ve çevresinde, SSR büyütme değerlerinin özellikle düşük frekanslarda yüksek olduğu gözlenmiştir. En düşük SSR büyütme değerleri ise volkanitler üzerinde konumlanan Şenkaya ve Narman istasyonlarında hesaplanmıştır.

show abstract

Soil characterization of Bornova Plain (Izmir, Turkey) and its surroundings using a combined survey of MASW and ReMi methods and Nakamura’s (HVSR) technique

Cited by 20 publications

References 17 publications

The 30 October 2020 Samos (Eastern Aegean Sea) Earthquake: effects of source rupture, path and local-site conditions on the observed and simulated ground motions

The 30 October 2020 Samos (Eastern Aegean Sea) Earthquake: effects of source rupture, path and local-site conditions on the observed and simulated ground motions

A survey of damage observed in Izmir due to 2020 Samos-Izmir earthquake

Erzurum ve Çevresi Yerel Zemin Etkilerinin SSR ve HVSR Yöntemleri Kullanılarak Araştırılması

Contact Info

Product

Resources

About