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Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design

lthough Dhaka city has experienced any moderate to large earthquakes in the past, some recent ground shakings are certainly indications of its earthquake source and vulnerability. In addition, microseismicity data also supports the existence of at least four earthquake source points in and around Dh...

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Main Authors:	Islam, A.B.M.S., Ahmad, Syed Ishtiaq, Jameel, M., Jumaat, Mohd Zamin
Format:	Article
Published:	Practice Periodical on Structural Design and Construction 2010
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.um.edu.my/6012/ http://ascelibrary.org/action/showAbstract?page=13&volume=17&issue=1&journalCode=ppscfx&view=fulltext
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spelling	my.um.eprints.60122020-02-05T04:27:59Z http://eprints.um.edu.my/6012/ Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design Islam, A.B.M.S. Ahmad, Syed Ishtiaq Jameel, M. Jumaat, Mohd Zamin TA Engineering (General). Civil engineering (General) lthough Dhaka city has experienced any moderate to large earthquakes in the past, some recent ground shakings are certainly indications of its earthquake source and vulnerability. In addition, microseismicity data also supports the existence of at least four earthquake source points in and around Dhaka. However, it is important to appropriately consider the seismic lateral load effect in structural design. A newly adopted technology of seismic design is to isolate the superstructure from the substructure with the use of a base isolator. This paper covers the design of base isolators for a building located in Dhaka, Bangladesh, along with its structural and economic feasibility. A time history is generated for Dhaka, adjusting peak ground acceleration as per seismic region from a nearby recorded earthquake. The response spectrum curve based on the site geology of Dhaka is also generated from this time history. Linear static as well as dynamic (time history and response spectrum) analyses have been carried out for both isolated and nonisolated buildings. Similar analyses have also been repeated for buildings with different heights but similar plan areas. The study reveals that for low-to medium-rise buildings, isolation can reduce seismic force along with some savings in structural cost of the building, though incorporating base isolators increase the overall price and installation cost. A meticulous review indicates that savings may be in the order of 5â��10 of the total structural cost of the respective building. Practice Periodical on Structural Design and Construction 2010 Article PeerReviewed Islam, A.B.M.S. and Ahmad, Syed Ishtiaq and Jameel, M. and Jumaat, Mohd Zamin (2010) Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design. Practice Periodical on Structural Design and Construction, 17 (1). pp. 13-20. ISSN 1084-0680 http://ascelibrary.org/action/showAbstract?page=13&volume=17&issue=1&journalCode=ppscfx&view=fulltext 10.1061/(ASCE)SC.1943-5576.0000093
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Islam, A.B.M.S. Ahmad, Syed Ishtiaq Jameel, M. Jumaat, Mohd Zamin Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design
description	lthough Dhaka city has experienced any moderate to large earthquakes in the past, some recent ground shakings are certainly indications of its earthquake source and vulnerability. In addition, microseismicity data also supports the existence of at least four earthquake source points in and around Dhaka. However, it is important to appropriately consider the seismic lateral load effect in structural design. A newly adopted technology of seismic design is to isolate the superstructure from the substructure with the use of a base isolator. This paper covers the design of base isolators for a building located in Dhaka, Bangladesh, along with its structural and economic feasibility. A time history is generated for Dhaka, adjusting peak ground acceleration as per seismic region from a nearby recorded earthquake. The response spectrum curve based on the site geology of Dhaka is also generated from this time history. Linear static as well as dynamic (time history and response spectrum) analyses have been carried out for both isolated and nonisolated buildings. Similar analyses have also been repeated for buildings with different heights but similar plan areas. The study reveals that for low-to medium-rise buildings, isolation can reduce seismic force along with some savings in structural cost of the building, though incorporating base isolators increase the overall price and installation cost. A meticulous review indicates that savings may be in the order of 5â��10 of the total structural cost of the respective building.
format	Article
author	Islam, A.B.M.S. Ahmad, Syed Ishtiaq Jameel, M. Jumaat, Mohd Zamin
author_facet	Islam, A.B.M.S. Ahmad, Syed Ishtiaq Jameel, M. Jumaat, Mohd Zamin
author_sort	Islam, A.B.M.S.
title	Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design
title_short	Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design
title_full	Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design
title_fullStr	Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design
title_full_unstemmed	Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design
title_sort	seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design
publisher	Practice Periodical on Structural Design and Construction
publishDate	2010
url	http://eprints.um.edu.my/6012/ http://ascelibrary.org/action/showAbstract?page=13&volume=17&issue=1&journalCode=ppscfx&view=fulltext
_version_	1662755135355355136
score	13.211869

Seismic base isolation for buildings in regions of low to moderate seismicity: practical alternative design

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