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 / B. Ferracuti; M. Savoia. - ELETTRONICO. - (2005). (Intervento presentato al convegno BBFS tenutosi a Hong-Kong nel 2005).
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
