A tension – stiffening law for reinforced concrete elements strengthened by FRP – plate/sheets is proposed. It is calibrated through numerical simulations concerning FRP-strengthened RC tensile elements. Discrete concrete cracking and non-linear bond-slip laws for FRP-concrete and steel-concrete interfaces are considered. Along the element, tensile strength of concrete is taken as a randomly varying quantity. From numerical data, tension-stiffening laws are calibrated, and results are compared with the case of unstrengthened elements. It is shown that the presence of a small thickness external reinforcements provides for a significant reduction of axial deformability in the cracked range as well as for a strong reduction of width of transverse cracks in concrete.

Tension – stiffening law for FRP – reinforced concrete elements under service loadings

FERRACUTI, BARBARA;SAVOIA, MARCO
2005

Abstract

A tension – stiffening law for reinforced concrete elements strengthened by FRP – plate/sheets is proposed. It is calibrated through numerical simulations concerning FRP-strengthened RC tensile elements. Discrete concrete cracking and non-linear bond-slip laws for FRP-concrete and steel-concrete interfaces are considered. Along the element, tensile strength of concrete is taken as a randomly varying quantity. From numerical data, tension-stiffening laws are calibrated, and results are compared with the case of unstrengthened elements. It is shown that the presence of a small thickness external reinforcements provides for a significant reduction of axial deformability in the cracked range as well as for a strong reduction of width of transverse cracks in concrete.
BBFS Conference Proceedings
B. Ferracuti; M. Savoia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/13042
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