Questioning the applicability of soil amplification factors as defined by NEHRP (USA) in the Israel building standards

Zaslavsky, Y.; Shapira, Avi; Gorstein, M.; Perelman, N.; Ataev, G.; Aksinenko, Tatiana

doi:10.4236/ns.2012.428083

Cited by 9 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Zaslavsky ve diğ. [13], yerel zemin sınıflandırmasına göre ivme tepki spektrumlarını doğrulamak amacıyla V s,30 parametresi ve ilgili F a ve F v faktörlerine bağlı olan NEHRP-97 [10] zemin sınıflandırmasının uygulanabilirliğini, İsrail bina standartları için incelemiştir. Zemin sınıflandırması ve dolayısıyla zemin amplifikasyonu genelleştirmesinin, tek bir parametre, yani V s,30 vasıtasıyla tavsiye edilemeyeceği sonucuna varmışlardır.…”

Section: Introductionunclassified

Zemin Büyütme Katsayılarının Betonarme Taşıyıcı Sistemlerin Sismik Performans Potansiyeline ve Maliyetine Etkileri

2019

View full text Add to dashboard Cite

Bu çalışmada, zemin koşullarına bağlı olarak değişen zemin büyütme katsayıları ile oluşturulan farklı yönetmeliklerdeki farklı tasarım ivme spektrumlarının kullanılmasının bina türü yapıların betonarme taşıyıcı sistemlerinin maliyetine ve sismik performans potansiyeline olan etkileri karşılaştırmalı olarak araştırılmıştır. Bu amaçla, farklı kat sayılarına sahip prototip betonarme binalar, farklı zemin sınıfları için oluşturulan Deprem Bölgelerinde Yapılacak Binalar Hakkında Yönetmelik (DBYBHY2007), Uniform Building Code (UBC97) ve Minimum Design Loads for Buildings and Other Structures (ASCE/SEI 7-10) yönetmeliklerindeki tasarım ivme spektrumları kullanılarak tasarlanmış ve betonarme taşıyıcı sistemlerin maliyet karşılaştırmaları yapılmıştır. Ayrıca, tasarımı yapılan taşıyıcı sistemlerin zaman tanım alanı analizleri temsili tarihi deprem kayıtları altında gerçekleştirilerek sismik performans potansiyelleri karşılaştırılmıştır.

show abstract

Section: Introductionunclassified

Zemin Büyütme Katsayılarının Betonarme Taşıyıcı Sistemlerin Sismik Performans Potansiyeline ve Maliyetine Etkileri

2019

View full text Add to dashboard Cite

show abstract

“…In addition, Zaslavsky et al (2012), based on synthetic acceleration response spectra of real sites, conclude that a single parameter Vs 30 cannot be used for generalizing site classification in the complex geological conditions of Israel.…”

Section: Introductionmentioning

confidence: 99%

Combination of HVSR and MASW Methods to Obtain Shear Wave Velocity Model of Subsurface in Israel

Gorstein

Ezersky

2015

IJGE

Self Cite

View full text Add to dashboard Cite

Estimating possible site effect is an integral part of evaluation of the seismic hazard and reduction of earthquake damages. In regions with low or moderate seismicity as in Israel, the site response should be determined by analytical tools. These computations require knowledge of the subsurface geological structure in terms of shear-wave velocity (Vs) profile down to seismic bedrock. Conventionally, this problem is resolved by joint implementation of Horizontal-to-Vertical Spectral Ratios (HVSR or Nakamura's) technique, which is based on ambient noise measurements and seismic methods such as S-wave refraction or Multichannel Analysis of Surface Waves (MASW) method. The first one does not allow deep penetration of seismic waves because of its weak source. The MASW method using 4.5 Hz geophones is restricted in penetration depth of surface waves because of frequency (wavelength) limitations. In this study, we have applied 2.5 Hz geophones and special data processing to provide constructing Vs section to a depth of 100 m and deeper. In combination with HVSR measurements, MASW enables constructing reliable subsurface model, which could be integrated into the seismic hazard assessment. Testing of this combined methodology was carried out at a number of sites with differing geological structures in Israel.

show abstract

“…Avni (1999) tried to reduce the impact of local geology and attempted to generate basic attenuation curves for specific azimuths. Zohar and Marco (2012)…”

Section: Discussionmentioning

confidence: 99%

“…The value of 30 m comes from the US and European building codes, where it was found empirically that this depth is directly proportional to deeper and shallower values . Zaslavsky et al (2012) argued that the use of V s 30 is a simplification that cannot be justified in the complex geological conditions in Israel, yet no alternatives have thus far been proposed. Therefore, in this scenario, the Standards Institution of Israel still adopts the V s 30 index.…”

Section: Site Responsementioning

confidence: 99%

Calibrating a New Attenuation Curve for the Dead Sea Region Using Surface Wave Dispersion Surveys in Sites Damaged by the 1927 Jericho Earthquake

Darvasi¹,

Agnon²

2018

Preprint

View full text Add to dashboard Cite

Abstract. Strong motion data is not common around the Dead Sea region. Therefore, calibrating a new attenuation equation is a considerable challenge. However, the Holy Land has a remarkable historical archive, attesting to numerous regional and local earthquakes. Combining the historical record with modern measurements will enhance the regional equation. On 11 July 1927, a crustal rupture generated a moderate 6.25ML earthquake around the northern part of the Dead Sea. Up to five hundred people were killed and extensive destruction was recorded, even at places as far as 150 kilometers from the focus. We consider local near-surface properties, in particular, the shear-wave velocity, as an amplification factor. Where the shear-wave velocity is low, the seismic intensity at places far from the focus would likely be greater than expected from a standard attenuation curve. In this work, we used the Multi Analysis of Surface Waves (MASW) method to estimate seismic wave velocity at anomalous sites in Israel in order to calibrate a new attenuation equation for the Dead Sea region, based on 1927 macroseismic data integrated with modern measurements. Our new attenuation equation contains a term which quantifies solely lithological effects, whilst factors such as building quality, foundation depth, topography, earthquake directivity, type of fault, etc., remained out of the equation. Nonetheless, about 60 % of the measured anomalous sites fit expectations and better fitting is achieved compared to other relevant attenuation equations. From a local point of view, this is the first time that an integration between historical data and modern seismic measurements improves the attenuation relation for the Dead Sea region. In the wider context, regions of low-to-moderate seismicity should use historical earthquake data together with modern measurements in order to better estimate the peak ground acceleration or the seismic intensities caused by future earthquakes. This integration will conceivably lead to a better understanding of future earthquakes and improve maps of seismic risk.

show abstract

Questioning the applicability of soil amplification factors as defined by NEHRP (USA) in the Israel building standards

Cited by 9 publications

References 12 publications

Zemin Büyütme Katsayılarının Betonarme Taşıyıcı Sistemlerin Sismik Performans Potansiyeline ve Maliyetine Etkileri

Zemin Büyütme Katsayılarının Betonarme Taşıyıcı Sistemlerin Sismik Performans Potansiyeline ve Maliyetine Etkileri

Combination of HVSR and MASW Methods to Obtain Shear Wave Velocity Model of Subsurface in Israel

Calibrating a New Attenuation Curve for the Dead Sea Region Using Surface Wave Dispersion Surveys in Sites Damaged by the 1927 Jericho Earthquake

Contact Info

Product

Resources

About