Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

doi:10.1007/s11709-014-0231-4

Front Struc Civil Eng

0, Vol.

Issue () : 69-82 https://doi.org/10.1007/s11709-014-0231-4

CASE STUDY

Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)

Asskar Janalizadeh CHOOBBASTI, Sadegh REZAEI, Farzad FARROKHZAD(

), Pedram Haidarzaeh AZAR

Department of Civil Engineering, Babol University of Technology, Babol, Mazandaran 484, Iran

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Abstract

In this the present study, an attempt has been made to evaluate the seismic hazard considering local site effects by carrying out detailed geotechnical site characterization in Babol, Iran. Use of geotechnical data and synthesis of drilling data extracted from the Babol’s subsurface database have enabled authors to determine the geotechnical properties of each site. These data are consisted of twenty five boreholes up to depth of 40 m. Based on the obtained data from geotechnical investigation the study area is divided to five zones. Dynamic analysis was performed in time domain, using fully nonlinear model by PLAXIS. A series of analysis in the study area showed the site period, ranging from 0.4 to 0.8 s. Finally the obtained response spectra from fully nonlinear method were compared with site response spectra of Iran’s 2800 (earthquake) code.

Keywords fully nonlinear method site effect dynamic analysis response spectra

Corresponding Author(s): FARROKHZAD Farzad,Email:FarzadFarokhzad@yahoo.com

Issue Date: 05 March 2014

Cite this article:

Asskar Janalizadeh CHOOBBASTI,Sadegh REZAEI,Farzad FARROKHZAD, et al. Evaluation of site response characteristic using nonlinear method (Case study: Babol, Iran)[J]. Front Struc Civil Eng, 0, (): 69-82.

URL:

https://academic.hep.com.cn/fsce/EN/10.1007/s11709-014-0231-4
https://academic.hep.com.cn/fsce/EN/Y0/V/I/69

Fig.1 Study area and zonation map

Tab.1 Specifications of strong motions used for near field analysis

Tab.2 Specifications of strong motions used for middle field analysis

Tab.3 Specifications of strong motions used for far field analysis

Fig.2 Acceleration time history of near field earthquakes

Fig.3 Acceleration time history of middle field earthquakes

Fig.4 Acceleration time history of far field earthquakes

Fig.5 Geometry model, boundary conditions and finite element mesh

Fig.6 Faults of study area

Fig.7 Location of geotechnical boreholes

Tab.4 Material properties for zone A (layers 1-4)

Fig.8 Comparison of normalized response spectra of zone A. (a) Near field; (b) middle field; (c) far field

Tab.5 Material properties for zone B (layers 1-3)

Fig.9 Comparison of normalized response spectra of zone B. (a) Near field; (b) middle field; (c) far field

Tab.6 Material properties for zone C (layers 1-3)

Fig.10 Comparison of normalized response spectra of zone C. (a) Near field; (b) middle field; (c) far field

Tab.7 Material properties for zone D (layers 1-3)

Fig.11 Comparison of normalized response spectra of zone D. (a) Near field; (b) middle field; (c) far field

Tab.8 Material properties for zone E (Layers 1-3)

Fig.12 Comparison of normalized response spectra of zone E. (a) Near field; (b) middle field; (c) far field

Fig.13 Babol city microzonation map by natural period

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