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The resistances of stud shear connectors with profiled sheeting

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Yuan, Hui (1996) The resistances of stud shear connectors with profiled sheeting. PhD thesis, University of Warwick.

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Abstract

This thesis presents the study of the static behaviour of stud shear connectors
welded through profiled sheeting and the fatigue resistances of the connectors in
composite bridges.
In the presence of profiled sheeting in a composite beam, the resistance of
stud connectors to static shear is influenced by the geometry of the ribs and the
position of the studs within them. This is allowed for in the existing methods
by applying a reduction factor to the resistance of the stud in a solid slab, but
a study of the results of 203 push-out tests showed that the influences are not
taken into account properly. The reason, revealed by 16 new push-out tests with
transverse sheeting and 18 with parallel sheeting, is that the existing methods do
not distinguish between the various failure modes.
New conceptual and mathematical models are developed with respect to the
different failure modes. For transverse sheeting, up to nine parameters are involved,
among which five are shown by statistic analyses to have negligible influence.
Based on the other four, simpler expressions for reduction factors are
derived, and the characteristic resistances (5% fractile) are given. For parallel
sheeting, however, it is found that the reduction factor method used in the existing
models is not suitable, because the mechanism of load transfer is different. On
a whole, the new models improve the prediction of 95% of all the valid reported
test results, from a range -40% to +100% to within +11%.
The fatigue resistances of stud connectors in composite bridges are studied
statistically using 115 sets of reported data. It is found that the testing methods
have significant influence on the results, and are the reason for the discrepancies
between the existing models. A new model is proposed, based on the most reliable
group of data.

Item Type: Thesis (PhD)
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Library of Congress Subject Headings (LCSH): Composite construction, Joints (Engineering), Sheet-metal work
Official Date: December 1996
Dates:
DateEvent
December 1996Submitted
Institution: University of Warwick
Theses Department: School of Engineering
Thesis Type: PhD
Publication Status: Unpublished
Supervisor(s)/Advisor: Johnson, R. P. (Roger Paul)
Sponsors: Steel Construction Institute (Great Britain)
Extent: xx, 207 leaves
Language: eng

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