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Effect of isolators on regular bridges subjected to scaled near field and far field time histories

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TitleInfo
Title
Effect of isolators on regular bridges subjected to scaled near field and far field time histories
Name (type = personal)
NamePart (type = family)
Kuppa
NamePart (type = given)
Tejaswi L.
NamePart (type = date)
1990-
DisplayForm
TEJASWI KUPPA
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Najm
NamePart (type = given)
Husam
DisplayForm
Husam Najm
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Balaguru
NamePart (type = given)
Perumalsamy
DisplayForm
Perumalsamy Balaguru
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Yong
NamePart (type = given)
Yook-Kong
DisplayForm
Yook-Kong Yong
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2014
DateOther (qualifier = exact); (type = degree)
2014-05
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Seismic isolation is an important and widely used method to protect a structure from the devastating effects of earthquake ground motions. Seismic isolation seeks to mitigate the effects of the ground motions by decreasing the base shear acting on the structure by increasing the fundamental time period of the structure in question. This in turn affects the spectral acceleration and hence the base shear. This thesis deals with investigating the behavior of lead core rubber isolators, on bridges, under near field and far field earthquake loading. The earthquake records were scaled to three intensities, namely, very high, high, and medium to high. The parameters investigated were the longitudinal base shear, transverse base shear, longitudinal displacement and transverse displacement caused by a wide range of scaled earthquake load intensities. SAP 2000 was used to run the analysis on different bridge models which varied in the number of spans, length of span and the height of the columns. The lead core rubber isolators used in the models varied in the longitudinal and transverse stiffness. The isolator stiffness ranged from 90 kips per feet to 270 kips per feet. The results showed that the isolators reduced the longitudinal base shear for most cases. With the use of isolators there was also an increase in displacements. The results in the transverse direction showed variability which was caused by not smoothing out the response curves for the ground motions in the transverse direction. The results also show that care has to be taken when using isolation for bridges in locations with very high intensity earthquakes. For medium to high intensity earthquakes, isolators with initial stiffness between 90 to 270 k/ft can be used. For bridges in extreme earthquake zones, the use of isolators should be evaluated based on the earthquake record used and the bridge properties. The results also show that using isolators for bridges with less flexible substructure resulted in a greater reduction in base shear for most cases. The use of isolators with high initial stiffness, resulted in lower base shears in far field cases when compared to near field cases.
Subject (authority = RUETD)
Topic
Civil and Environmental Engineering
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_5420
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xxxiv, 328 p. : ill.
Note (type = degree)
M.S.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Tejaswi L. Kuppa
Subject (authority = ETD-LCSH)
Topic
Earthquake resistant design
Subject (authority = ETD-LCSH)
Topic
Earthquake engineering--Research
Subject (authority = ETD-LCSH)
Topic
Bridges--Earthquake effects
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/T3N014TS
Genre (authority = ExL-Esploro)
ETD graduate
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
KUPPA
GivenName
TEJASWI
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2014-04-10 16:13:25
AssociatedEntity
Name
TEJASWI KUPPA
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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RULTechMD (ID = TECHNICAL1)
ContentModel
ETD
OperatingSystem (VERSION = 5.1)
windows xp
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