Location

San Diego, California

Session Start Date

3-26-2001

Session End Date

3-31-2001

Abstract

Bandung is considered as a relatively earthquake prone region. Seismic risk analysis considering subduction zone and surrounding active strike-slip faults in the area was performed. Crouse and Joyner & Boore attenuation functions were adopted for the subduction and strike-slip faults, respectively. The analysis was performed employing total probability theorem using EQRISK program with modification on the attenuation functions. The analysis indicated that peak base-rock acceleration is 147 gal and 200 gal for 200 and 500 years return period, respectively. Local site effects were considered by performing site response analyses in the form of wave propagation analysis from base-rock to ground surface. The analyses were performed by considering variations in dynamic soil properties. Properties of the local ground are obtained from collected soil investigation report covering Bandung area especially for northward and southward area. The wave propagation analysis was performed by using SHAKE91 computer program. Various input motions consisting of scaled available strong motion records as well as synthetic time history that are considered reasonable for Bandung, it were employed in this analysis. Target spectra for Bandung considering subduction and strike-slip mechanism were developed and then it is used to generate synthetic time histories using SIMQKE program. Result of the analysis is presented in the form of peak ground surface acceleration and amplification factor contours at ground surface. In addition, site classification of southern and northern part of Bandung based on average shear wave velocity criteria was generated. The shear wave velocity for the sites was correlated from N-SPT obtained from soil boring data. Finally, response spectra for each site class covering important sites of Bandung area are presented along with recommendations on amplification factor and design response spectra. Result of the analysis was used as an input for damage estimates of buildings and lifelines for earthquake scenario as part of Risk Assessment Tools for Diagnostic of Urban Areas against Seismic Disaster (RADIUS) Project for earthquake disaster mitigation of the city. The design response spectra from this analysis are recommended for the new building codes of the city.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fourth Conference

Publisher

University of Missouri--Rolla

Publication Date

3-26-2001

Document Version

Final Version

Rights

© 2001 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Mar 26th, 12:00 AM Mar 31st, 12:00 AM

Seismic Risk and Site Response Analysis for City of Bandung-Indonesia

San Diego, California

Bandung is considered as a relatively earthquake prone region. Seismic risk analysis considering subduction zone and surrounding active strike-slip faults in the area was performed. Crouse and Joyner & Boore attenuation functions were adopted for the subduction and strike-slip faults, respectively. The analysis was performed employing total probability theorem using EQRISK program with modification on the attenuation functions. The analysis indicated that peak base-rock acceleration is 147 gal and 200 gal for 200 and 500 years return period, respectively. Local site effects were considered by performing site response analyses in the form of wave propagation analysis from base-rock to ground surface. The analyses were performed by considering variations in dynamic soil properties. Properties of the local ground are obtained from collected soil investigation report covering Bandung area especially for northward and southward area. The wave propagation analysis was performed by using SHAKE91 computer program. Various input motions consisting of scaled available strong motion records as well as synthetic time history that are considered reasonable for Bandung, it were employed in this analysis. Target spectra for Bandung considering subduction and strike-slip mechanism were developed and then it is used to generate synthetic time histories using SIMQKE program. Result of the analysis is presented in the form of peak ground surface acceleration and amplification factor contours at ground surface. In addition, site classification of southern and northern part of Bandung based on average shear wave velocity criteria was generated. The shear wave velocity for the sites was correlated from N-SPT obtained from soil boring data. Finally, response spectra for each site class covering important sites of Bandung area are presented along with recommendations on amplification factor and design response spectra. Result of the analysis was used as an input for damage estimates of buildings and lifelines for earthquake scenario as part of Risk Assessment Tools for Diagnostic of Urban Areas against Seismic Disaster (RADIUS) Project for earthquake disaster mitigation of the city. The design response spectra from this analysis are recommended for the new building codes of the city.