Site-Specific Seismic Ground Response Analysis for Typical Soil Sites in Central Khartoum, Sudan

2022 ◽  
pp. 529-546
Author(s):  
Mohammed Al-Ajamee ◽  
Mohamedelamin M. M. Mahmoud ◽  
Ahmed M. El Sharief
Keyword(s):  
Response Analysis ◽  
Ground Response ◽  
Ground Response Analysis ◽  
Site Specific ◽  
Seismic Ground Response ◽  
Typical Soil

Importance of Site-Specific Dynamic Soil Properties for Seismic Ground Response Studies

2018 ◽  
Vol 9 (1) ◽  
pp. 78-98 ◽  
Author(s):  
Shiv Shankar Kumar ◽  
Arindam Dey ◽  
A. Murali Krishna
Keyword(s):  
Soil Properties ◽  
Dynamic Properties ◽  
Damping Ratio ◽  
Response Analysis ◽  
Ground Response ◽  
Ground Response Analysis ◽  
Site Specific ◽  
Dynamic Soil Properties ◽  
Acceleration Time Histories ◽  
Seismic Ground Response

This article highlights the implication of site-specific properties on seismic ground response studies. One-dimensional equivalent linear ground response analysis was carried out using site-specific dynamic properties of locally available soils of Guwahati city, and the results are compared with those obtained using existing strain-dependent dynamic properties. Acceleration time histories from three strong motions were used. It was observed that an input motion having a higher peak bedrock acceleration, utilizing experimentally obtained dynamic soil properties, exhibits 38% and 24% lower peak ground acceleration and peak spectral acceleration, respectively, in comparison to the results obtained using standard VD-SI soil models. The amplification characteristics of the strong motions are observed to be significantly influenced by the degradation of damping ratio beyond 1% shear strain. The results highlight the necessity of conducting GRA of any region considering its regional dynamic soil properties to obtain more realistic outcomes.

Site-Specific Ground Motion Studies for a Deep Soil Site Near Ahmedabad, Gujarat

2018 ◽  
pp. 31-65
Author(s):  
A. Boominathan ◽  
Krishna Kumar ◽  
R. Vijaya
Keyword(s):  
Seismic Hazard ◽  
Hazard Analysis ◽  
Response Analysis ◽  
Ground Response ◽  
Ground Response Analysis ◽  
Site Specific ◽  
Linear Approach ◽  
Specific Analysis ◽  
Soil Site ◽  
A Site

Design ground motions are usually developed by one of two approaches: by performing site-specific analyses or from provisions of building codes. Although contemporary codes consider the site effects to an extent, they provide more conservative estimates. Hence, site-specific analysis, which involves both the seismic hazard analysis and ground response analysis, is a preferred approach to obtain design ground motions. This chapter presents a site-specific analysis for a site near Ahmedabad, Gujarat. The seismic hazard analysis was carried out by DSHA approach. The site is predominantly characterized by deep stiff sandy clay deposits. Extensive shear wave velocity measurement is used for site classification and ground response analysis. The ground response analysis was carried out by using two approaches: the equivalent linear approach using SHAKE2000 and the non-linear approach using FLAC2D. The deep-stiff-soil site is found to amplify the ground motion. The response from nonlinear analysis is found to be considerably higher than those obtained from the equivalent linear approach.

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