A Concrete-Steel Bond Model For Use in finite Element Modeling of Reinforced Concrete Structures

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Title: A Concrete-Steel Bond Model For Use in finite Element Modeling of Reinforced Concrete Structures

Author(s): L. N. Lowes

Publication: Special Publication

Volume: 205

Issue:

Appears on pages(s): 251-272

Keywords: analysis; anchorage; bond; constitutive model; cyclicloading; damage; earthquake loading; finite element analysis;non-local modeling; reinforced concrete

Date: 1/1/2002

Abstract:
As a structural material, reinforced concrete requires bond between plain concrete and reinforcing steel. Accurate numerical modeling of structures that exhibit severe bond-stress demand requires explicit representation of bond-zone response. A bond element is presented for use in high-resolution finite element modeling of reinforced concrete structures subjected to general loading. The model is defined by a bond stress versus slip relationship and a relationship between maximum bond strength and the concrete and steel stress-strain state. A finite element implementation of the model is proposed that enables a one-or two-dimensional representation of bond-zone action. Non-local modeling is used to incorporate the dependence of bond strength on the concrete and steel material state. Comparisons of simulated and observed response for systems with uniform and variable bond-zone conditions are presented.