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Interfacial Shear Transfer of Reinforced Concrete with High-Strength Materials
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2023-12-01
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[PDF-1.73 MB]
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Edition:Final Report January 1, 2011 – December 30, 2023
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Abstract:Current design provisions pertaining to the shear transfer strength of concrete-to-concrete interfaces, including those of the AASHTO LRFD design specifications and ACI 318 code, are based on limited physical test data from studies conducted decades ago. Since the development of these design provisions, many studies have been conducted to investigate additional parameters. In addition, modern concrete technology has expanded the range of materials available and often includes the use of high-strength concrete and high-strength reinforcing steel. Recent studies examined the applicability of current shear friction design approaches to interfaces that comprise high-strength concrete and/or high-strength steel and identified a need for revision to the existing provisions. To this end, this study leveraged a comprehensive database of test results collected from the literature to propose a deep learning-based predictive model for normal-weight concrete-to-concrete interfacial shear strength. Additionally, a new computation scheme is proposed to estimate the design shear strength with a higher prediction accuracy than the existing AASHTO LRFD and ACI 318 design provisions.
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