Analytical Model For Bond-Slip Behavior Under Monotonic Loading in Concrete

The stress transfer between reinforcing steel and surrounding concrete plays an important role in the response of reinforced concrete structures. As disregard the Slip between rebar and concrete and assume full bond between them, conducted to poor structural response with respect to actual structural response. In this paper the distributions of bond stress, slip and strain are analyzed. The local bond-slip law is idealized by a piecewise linear relationship, for each part of which closed-form solutions are obtained for bond stress, slip and strain distributions. The steel bar length is divided into four zones in the general case. Conditions of continuity between zones and boundary conditions are used to solve the length of zones, and strain and slip distributions. Simultaneous transcendental equations are obtained and solved using Newton's tangent method. The analytical predicted results compare well with test results in tension.

Keywords:

Slip , Bond Stress , bond-slip relationship , Newton's tangent method