Probabilistic Seismic Hazard Assessment of Babol, Iran

Abdollahzadeh, Gholamreza; Shahaky, Mohsen

doi:10.5829/idosi.ijee.2011.02.03.0757

Cited by 2 publications

(7 citation statements)

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“…It is possible to describe the component behavior by using a nonlinear equation of force–displacement. Component behavior is generally nonlinear, but it is possible to reduce it in two or three linear models . It is possible to obtain model parameters according to the component dimensions and material specifications.…”

Section: Numerical Analysismentioning

confidence: 99%

“…Rotation describes connection with four transformation sources. Two out of four are in tension region, and the other two transformation sources are in bearing zone and include bearing concrete associated grout, seat angle and web under pressure, baseplate sheet under shearing, and tension bolts . Generally, elements of column to baseplate connection include springs as following: Tensile and bearing spring for terminal transformations of column section; Existing springs for considering anchor bolt and sheet exposing anchor bolt forces; Spring associated to support concrete, which only functions in pressure; Bending spring for transformations of sheet plastic. …”

Section: Numerical Analysismentioning

confidence: 99%

“…In this study, formulating moment–rotation is followed in five steps, and shear and axial loading effect is analyzed whereas sheet bending is not analyzed. It is very important to estimate initial stiffness with moment–rotation response in baseplate connections, supporting frame analysis and designing . Generally, correct modeling of connections behavior, which is shown as moment–rotation curve, has direct influence on column resistance and frame behavior according to the studies of Picard in 1987.…”

Section: Introductionmentioning

confidence: 99%

“…It is very important to estimate initial stiffness with moment-rotation response in baseplate connections, supporting frame analysis and designing. [13][14][15][16][17][18][19] Generally, correct modeling of connections behavior, which is shown as…”

mentioning

confidence: 99%

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Experimental and numerical evaluation of rigid column to baseplate connection under cyclic loading

Abdolahzadeh

Shabanian

Tavakol

2019

Structural Design Tall Build

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Summary One of the most important connections in steel structures is column to the baseplate connection. This kind of connection has a complex nature, due to different behaviors of the constituents, including baseplate, grout, foundation, and anchor bolts. Studying the impact of this connection in general behavior of structure seems to be an essential issue, especially during earthquake, which is more likely to be associated with plastic hinge forming. The main goal of this work is to provide a hybrid modeling for describing hysteresis behavior of column to the baseplate connection. Within hybrid modeling, a mechanical model is accomplished by using neural network model components. Our findings reveal that hybrid models are able to show pinched hysteresis complex behavior of baseplate connections. Also, the proposed hybrid developed model is robust and reliable approaches for predicting behaviors of a recent designed connection.

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Section: Numerical Analysismentioning

confidence: 99%

Section: Numerical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Experimental and numerical evaluation of rigid column to baseplate connection under cyclic loading

Abdolahzadeh

Shabanian

Tavakol

2019

Structural Design Tall Build

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“…Some of the regions for which seismic hazard analysis have been conducted are Tehran -the capital of Iran (Ghodrati Amiri et al, 2007), Shiraz (Ghodrati Amiri, Razeghi, RazavianAmrei, Alaee, & Rasouli, 2008), Arak (Ghodrati Amiri, 2010), Babol (Abdollahzadeh & Shahaky, 2011) and Kermanshah-Sanandaj (Shabani & Mirzaei, 2007). Gorgan -the centre of Golestan Province -is situated in the north-east of Iran with high seismic activity in Iranian Code of Practice for Seismic Resistant Design of Buildings, standard 2800 (Building and Housing Research Center, (BHRC), 2005).…”

Section: Introductionmentioning

confidence: 98%

Modified probabilistic approach for seismic hazard zoning of Golestan region, Iran

Abdollahzadeh¹,

Khanmohammadi²,

Tajrishi³

2014

European Journal of Environmental and Civil Engineering

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In this article, seismic zoning maps of Golestan based on modified methodology of probabilistic seismic hazard analysis have been prepared. For this purpose, first, major seismotectonic provinces of Iran surrounding the study region are delineated and seismicity parameters are evaluated for each province. By determining the main active faults of the region and preparing the earthquake catalog containing 19 historical events and 270 instrumental events, 25 potential seismic sources are modelled as area sources in the region. In order to properly reflect the inhomogeneity of seismicity in time and space, and to avoid underestimation of potential hazard of large magnitude earthquakes, the annual mean occurrence rate of earthquakes in each seismotectonic province should be allocated to each magnitude interval in the corresponding potential seismic sources, using the spatial distribution function. In this research, different kinds of seismological, tectonic and geophysical data are used to indicate the possible future earthquake activities in the interest region, providing basis for evaluation of spatial distribution function. Seismic hazard assessment is carried out by considering a universal attenuation relationship and using the SEISRISKIII computer program for the area in a radius of 200 km from centre of Gorgan (the centre of Golestan province). The study region is divided into a series of grid points and seismic hazard analysis for every grid point is carried out using characteristics of seismic activity in seismotectonic provinces and potential seismic sources. Horizontal Peak Ground Acceleration (PGA) for different seismic hazard levels is evaluated by modified probabilistic estimation. Finally, seismic hazard zoning maps of Golestan for 10% Probability of exceedance (PE) and 2% PE in 50 years and for three types of the site soil are prepared and compared with the seismic hazard macrozonation of Iran based on standard 2800.

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Probabilistic Seismic Hazard Assessment of Babol, Iran

Cited by 2 publications

References 0 publications

Experimental and numerical evaluation of rigid column to baseplate connection under cyclic loading

Experimental and numerical evaluation of rigid column to baseplate connection under cyclic loading

Modified probabilistic approach for seismic hazard zoning of Golestan region, Iran

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