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Composite shear stud strength at early concrete ages
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Date
2004-06-01
Author
Topkaya, Cem
Yura, JA
Williamson, EB
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Composite action between a reinforced concrete deck and steel girders is usually achieved by making use of welded headed shear studs. The mechanics of shear studs embedded in mature concrete has been investigated extensively in the past. Current literature, however, lacks experimental evidence of steel-concrete interface behavior at early concrete ages. This information is useful in understanding the behavior of bridges during construction. Current testing methods are not suitable for determining the response of shear studs embedded in early-age concrete. In order to avoid this limitation, a new pushout test setup has been developed. A total of 24 pushout tests were performed at concrete ages ranging from 4 h to 28 days. Test results were used to develop load-slip curves and strength expressions. Furthermore, the variation of concrete properties with time and the applicability of the existing code equations for predicting early-age concrete stiffness were examined. Test results revealed that shear transfer is achieved at very early concrete ages and rate of stiffness gain of concrete is greater than that of strength.
Subject Keywords
Mechanical Engineering
,
General Materials Science
,
Mechanics of Materials
,
Civil and Structural Engineering
,
Building and Construction
URI
https://hdl.handle.net/11511/38468
Journal
JOURNAL OF STRUCTURAL ENGINEERING-ASCE
DOI
https://doi.org/10.1061/(asce)0733-9445(2004)130:6(952)
Collections
Department of Civil Engineering, Article