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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Path-Dependent Stress–Strain Model for FRP-Confined Recycled Brick Aggregate Concrete
https://orcid.org/0000-0002-9478-2589
https://orcid.org/0000-0001-5853-8979
Fiber-reinforced polymer (FRP) confinement has shown promise as an alternative method aimed at enabling the structural use of recycled brick aggregate concrete (RBAC) in columns. To facilitate practical applications, an existing stress–strain model for FRP-confined normal concrete is modified in this paper to extend its applicability to FRP-confined RBAC. The modification was based on a rigorous approach involving a direct examination of the path-independent assumption, which was made possible by conducting companion tests on actively confined and FRP-confined RBAC. Comparisons of the stress–strain and dilation responses obtained from the two confinement schemes showed that the axial strain of RBAC can be considered path-independent while the axial stress of RBAC tends to be path-dependent. The underlying cause is probably that the weak resistance of recycled brick aggregate (RBA) makes itself a medium for crack propagation. The effect of path dependence is accounted for in the modified model by purposefully weakening the stress–strain response of actively confined RBAC to correct the overestimate found in the axial stresses of FRP-confined RBAC, which originates from adopting the path-independent assumption.
Path-Dependent Stress–Strain Model for FRP-Confined Recycled Brick Aggregate Concrete
https://orcid.org/0000-0002-9478-2589
https://orcid.org/0000-0001-5853-8979
Fiber-reinforced polymer (FRP) confinement has shown promise as an alternative method aimed at enabling the structural use of recycled brick aggregate concrete (RBAC) in columns. To facilitate practical applications, an existing stress–strain model for FRP-confined normal concrete is modified in this paper to extend its applicability to FRP-confined RBAC. The modification was based on a rigorous approach involving a direct examination of the path-independent assumption, which was made possible by conducting companion tests on actively confined and FRP-confined RBAC. Comparisons of the stress–strain and dilation responses obtained from the two confinement schemes showed that the axial strain of RBAC can be considered path-independent while the axial stress of RBAC tends to be path-dependent. The underlying cause is probably that the weak resistance of recycled brick aggregate (RBA) makes itself a medium for crack propagation. The effect of path dependence is accounted for in the modified model by purposefully weakening the stress–strain response of actively confined RBAC to correct the overestimate found in the axial stresses of FRP-confined RBAC, which originates from adopting the path-independent assumption.
Path-Dependent Stress–Strain Model for FRP-Confined Recycled Brick Aggregate Concrete
https://orcid.org/0000-0002-9478-2589
https://orcid.org/0000-0001-5853-8979
Fiber-reinforced polymer (FRP) confinement has shown promise as an alternative method aimed at enabling the structural use of recycled brick aggregate concrete (RBAC) in columns. To facilitate practical applications, an existing stress–strain model for FRP-confined normal concrete is modified in this paper to extend its applicability to FRP-confined RBAC. The modification was based on a rigorous approach involving a direct examination of the path-independent assumption, which was made possible by conducting companion tests on actively confined and FRP-confined RBAC. Comparisons of the stress–strain and dilation responses obtained from the two confinement schemes showed that the axial strain of RBAC can be considered path-independent while the axial stress of RBAC tends to be path-dependent. The underlying cause is probably that the weak resistance of recycled brick aggregate (RBA) makes itself a medium for crack propagation. The effect of path dependence is accounted for in the modified model by purposefully weakening the stress–strain response of actively confined RBAC to correct the overestimate found in the axial stresses of FRP-confined RBAC, which originates from adopting the path-independent assumption.
Path-Dependent Stress–Strain Model for FRP-Confined Recycled Brick Aggregate Concrete
J. Compos. Constr.
Jiang, T. (Autor:in) / Chen, P. (Autor:in) / Ji, P. (Autor:in) / Chen, G. M. (Autor:in)
01.08.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Stress-Strain Behavior of FRP-Confined Recycled Aggregate Concrete
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