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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Thermomechanical Behavior of Near-Surface-Mounted Carbon Fiber-Reinforced Polymer Concrete Interface
Author(s): Thushara Siriwardanage and Yail J. Kim
Publication: Structural Journal
Appears on pages(s): 567-576
Keywords: carbon fiber-reinforced polymer (CFRP); heat; interface; nearsurface- mounted (NSM); temperature; thermal
Abstract:This paper presents the behavior of near-surface-mounted (NSM) carbon fiber-reinforced polymer (CFRP) strips for strengthening concrete members subjected to thermomechanical distress (thermal and mechanical loads are applied simultaneously). The focus of the research lies on examining temperature-dependent interfacial responses that control the performance of such a CFRP-strengthening system. An experimental investigation is conducted to study various technical aspects associated with the thermal relaxation, heat conduction, load-carrying capacity, failure mode, and damage characterization of the NSM CFRP concrete interface. Analytical approaches are entailed to generate practical information that can promote use of CFRP-strengthening technologies, based on the two-parameter Weibull function along with probability-based capacity simulation. The thermal relaxation of a polymeric bonding agent influences the transfer of interfacial stresses, including the stress-decrease response time of the interface with temperature. Transient heat flow is apparent across the interface until the strengthening system fails due to the thermomechanical load. The failure plane of the interface is controlled by the progression of heat energy in conjunction with the phase transition of the adhesive. The slip of the interface articulates a thermal hysteresis mechanism when loaded cyclically. The characteristic parameters proposed aid the design of NSM CFRP systems exposed to elevated temperatures.
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