Abstract
Abstract The bond-slip relationship of Carbon Fiber Reinforced Polymer (CFRP) plate-concrete after the influence of high temperature action of Stone Mastic Asphalt (SMA) paving was investigated in this article. Two groups of double shear specimens with different bonding length were designed and tested. Based on the test results, the failure modes of specimens, the strain distribution and the shear stress of CFRP-concrete interface were analyzed. Considering the influence of high temperature, the interfacial bond-slip constitutive model of CFRP plate and concrete after high temperature action of SMA paving construction was proposed. The proposed model can reflect the nonlinearity and interface softening behaviour of the CFRP plate-concrete interface constitutive relationship under special environment. Through the comparative study of exixting constitutive models, the interface bond-slip constitutive model proposed in this paper considers the effect of high temperature and has good agreement with the test results.
Highlights
Due to the excellent material properties of Carbon Fiber Reinforced Polymer (CFRP), this material has been widely applied in the reinforcement of bridge structures (Siddika et al, 2019; Zhuang et al, 2018; Bocciarelli et al, 2018; Lepretre et al, 2018; Chataigner et al, 2018)
A thin layer of concrete is adhered to the CFRP plate after debonding, and the debonding failure occurs at the bonding interface between the concrete layer and the adjacent concrete resin
This paper investigated the bonding property of CFRP reinforced concrete structure after high temperature action of Stone Mastic Asphalt (SMA) paving construction
Summary
Due to the excellent material properties of Carbon Fiber Reinforced Polymer (CFRP), this material has been widely applied in the reinforcement of bridge structures (Siddika et al, 2019; Zhuang et al, 2018; Bocciarelli et al, 2018; Lepretre et al, 2018; Chataigner et al, 2018). Rukavina et al (2019) proposed a finite element model for simulating the bond-slip relationship of the fiber-reinforced concrete structure, and studied the failure mechanisms of reinforced concrete by considering different material characteristics. It is found that the proposed model can simplify the calculation process of non-linear behavior of fiber-reinforced concrete structure, and the bond-slip relationship can be better predicted as well. Yin and Fan (2018) and Al-Rousan and AL-Tahat (2019) systematically studied the influence of concrete surface on the bond-slip behavior of CFRP-concrete structures, a single shear test and a double shear test were respectively conducted by considering the roughness of the surface. Haddad (2019) conducted an experimental study on the bonding behavior between CFRP and cracked concrete, 15 pull-off specimens were tested and its test results were analyzed. It indicated that the bonding behavior between CFRP and cracked concrete mainly affected by the concrete status, CFRP plate shape and anchorage measure
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