Title:
Modeling Reinforced Interfaces—Cold Joints Subjected to Cyclic Shear
Author(s):
Vasiliki Palieraki, Elizabeth Vintzileou, and John F. Silva
Publication:
Structural Journal
Volume:
119
Issue:
4
Appears on pages(s):
225-238
Keywords:
cold joints; cyclic loading; dowel action; interface shear; shear friction; shear slip versus shear resistance curve
DOI:
10.14359/51734521
Date:
7/1/2022
Abstract:
The shear behavior of reinforced concrete interfaces between new and existing concrete is known to be a key parameter for the effectiveness of strengthening and repair interventions in reinforced
concrete structures subject to earthquakes. In this work, the mechanisms mobilizing the shear resistance of interfaces, both under monotonic and cyclic actions, are described. Constitutive relationships based on previous research are adopted for friction, for dowel action, and for their interaction. A simple algorithm is applied
whereby for each value of imposed shear slip, the contributions of the two participating mechanisms are summed, as dictated by the adopted constitutive relationships. The algorithm is applied to experimental results as found in the literature and as obtained by tests conducted by the authors. The agreement of experimental and calculated load-displacement curves under monotonic and cyclic shear loading is quite satisfactory.
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