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Abstracted in databases:
Thomson SCIE: Science Citation Index ExpandedTM (Web of
Science),
INSPEC,
EBSCO,
TRIS/TRIS Online, VINITI, CSA's ERD, CSA/ASCE (CSA's TRD), SCOPUS (Elsevier Database)
2015 Impact Factor: 0.519 ©2015 Thomson Reuters, 2015 Journal
Citation Report®
ISSN 1822-427X print
ISSN 1822-4288 online
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"The Baltic Journal of Road and Bridge Engineering"
Vilnius: Technika, 2014, Vol IX, No 1, p.
43-51 |
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Chang-Su Shim, Dong-Wook Kim, Mai
Xuan Nhat |
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Performance of stud clusters in
precast bridge decks |
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DOI: 10.3846/bjrbe.2014.06 |
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A new design approach to clustered stud shear
connection in composite bridges with precast decks
is required to accommodate highly concentrated shear
force in small area. Shear connection of the
prefabricated slab consists of stud connectors,
mortar in a shear pocket and reinforcement around
the pocket. More general design approach for the
shear connection is provided by relative strength
between shear strength of shear connectors, bearing
strength of mortar in shear pockets, and the shear
strength of precast deck. Considering the relatively
high strength mortar in the bearing zone of the
shear connection this paper deals with structural
performance of stud clusters to simplify the
connection details. In a shear pocket, closer stud
spacing than the current pitch requirement was
considered. Push-out tests were conducted to
evaluate the ultimate strength according to expected
failure modes. The main parameters of the test were
stud spacing and confining details. In order to use
group arrangement of stud connectors, it is
necessary to prevent premature failure of bearing
zone by strengthening the shear connection using
confining reinforcements. An empirical equation of
ultimate shear strength of the shear connection was
proposed to consider the effect of stud spacing when
the spacing is less than five times stud diameter.
Fatigue tests showed that the fatigue endurance of
clustered stud connectors with spacing of more than
three times stud diameter can be evaluated using
current design codes. |
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Keywords:
shear connection, precast deck, stud cluster, stud
spacing, ultimate shear strength, fatigue endurance.
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