Short Period Spectral Acceleration Zonation of Tehran a Comparison between Slip and Activity Rates Data&amp;rsquo;s

Jarahi, Hadi; Naraghiaraghi, Noushin; Nadalian, Malihe

doi:10.3844/ajgsp.2016.36.46

Cited by 6 publications

(7 citation statements)

References 33 publications

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“…Agliardi and Crosta (2003;Lan et al, 2007;Lan, 2011;Topal et al, 2007;Frattini et al, 2012a;2012b;Valagussa et al, 2014;Margottini et al, 2016), recent studies have led to know the modern methods of 3D zoning rockfall hazard, especially for communication networks (Budetta, 2004). The recent earthquakes, according to Firuzkuh fault movements (Jarahi et al, 2016), has led to increasing rockfalls in the study area. In this study, we use Lan et al (2007) method and RA software aims to study the rockfall hazard zonation in this part of Haraz highway.…”

Section: Introductionmentioning

confidence: 99%

Rock Fall Hazard Zonation in Haraz Highway

Jarahi¹,

Seifilaleh²

2016

American Journal of Engineering and Applied Sciences

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Takavar and Ebtehaj tunnels as part of Haraz highway are located in southwestern Damavand mount. Statistics show enormous financial and human damages in this route because of rockfall. Geological and topographical conditions, caused to the intensity of rockfall, because most of heights in this area covered by Damavand Trachyandesitic lava flows. In this study Rockfall Analyst (RA) software used to analysis risk modeling of rockfall in three-dimensional. In such a model, the spatial distribution of frequency, height velocity and energy of falling or rolling rocks are calculated. Then the layers in the same velocity, energy and height and the weight, were analyzed and finally 9 risk-prone regions were identified. However, except one of them, other areas need engineering solutions to drop the risk of rockfall.

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Section: Introductionmentioning

confidence: 99%

Rock Fall Hazard Zonation in Haraz Highway

Jarahi¹,

Seifilaleh²

2016

American Journal of Engineering and Applied Sciences

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“…Figure 1 shows potential seismic sources in Karaj region. Further the meizoseismal area of historical events and paleoshoreline trace (Jarahi et al, 2016) are shown. A total of 6 line sources and their corresponding Mmax are chosen.…”

Section: Probabilistic Seismic Hazard Analysismentioning

confidence: 99%

“…2. The logic tree for weighting seismic parameters (Jarahi et al, 2016) Generally, in seismic hazard analysis, annual rate of earthquakes in active faults is calculated by definite integration on magnitude-frequency relation.…”

Section: Probabilistic Seismic Hazard Analysismentioning

confidence: 99%

Probabilistic Seismic Hazard Deaggregation for Karaj City (Iran)

Jarahi¹

2016

American Journal of Engineering and Applied Sciences

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Abstract:In this study the results of PSHA deaggregation for 5%-damped 0.2, 0.5, 2 and 4 s spectral accelerations, corresponding to Mean Return Periods (MRPs) of 50 and 475 yr for Karaj city was presented. The aim of this paper is to quantify the dominant events that have the most contribution on ground-motion exceedance from the above mentioned hazard levels. The scenario earthquakes are characterized by bins of Magnitude (M) and source-to-site distance (R). The results reveal that for Karaj city, the hazard is mainly controlled by near active fault.

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“…Calculating spectral acceleration (Jarahi, 2011;Jarahi et al, 2015;Jarahi et al, 2016;Jarahi, 2016;Haerifard et al, 2018;Pourmohamad, 2006;Baker and Cornell, 2006a) is one of the most important steps in seismic designing for infrastructures like concrete dams. UHS is calculated for a period of 0 to 4 sec by probabilistic method with the unified weight (Bommer et al, 2008) to each spectral attenuation equations (Abrahamson and Silva, 1997;Campbell and Bozorgnia, 2003;Ambraseys et al, 2005) by using EZ-Frisk software Fig.…”

Section: Uniform Hazard Spectra (Uhs)mentioning

confidence: 99%

“…Hence, selecting these parameters is a logical selection for simulating earthquakes. Controlling magnitude is a midpoint of a range of earthquake magnitudes that may control the design (Jarahi, 2011;Jarahi et al, 2016;Jarahi, 2016). Considering SHD, the controlling earthquakes is evaluated for return periods of 475 and 2475years with the PGA and periods of 0.2, 0.5, 2 and 4 sec (Table 4 and Fig.…”

Section: Seismic Hazard Deaggregation (Shd)mentioning

confidence: 99%

PSHA Study Using EZ-Frisk Software Case Study Baychebaq Dam Site

Jarahi¹

2017

Current Research in Geoscience

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Awareness of seismicity, is the earliest requirement in seismic design of Dam constructions. This article is devoted to study on Seismotectonic and seismicity and also seismic risk analysis of the Baychebaq reservoir dam. These studies involve detecting seismic sources and assessing seismicity parameters. According to the studies, Peak Ground Acceleration (PGA) is 0.1 gal. This PHA may be related to there activation process of Takhte Soleiman which can produce an event around 6.8 Ms in the distance of 20 km from Baychebaq dam. According to the changes of Uniform Hazard Spectrum (UHS), Spectral acceleration parameter increases from period of 0 (0.03 gal) to a period of 0.175 (0.1 gal) and then reduced slightly. Based on the results, the controlling earthquake has a magnitude of 6.1 and 6.5 Mw at a period of 0 for return periods of 475 and 2475 years.

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Short Period Spectral Acceleration Zonation of Tehran a Comparison between Slip and Activity Rates Data’s

Cited by 6 publications

References 33 publications

Rock Fall Hazard Zonation in Haraz Highway

Rock Fall Hazard Zonation in Haraz Highway

Probabilistic Seismic Hazard Deaggregation for Karaj City (Iran)

PSHA Study Using EZ-Frisk Software Case Study Baychebaq Dam Site

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