Improved Serviceability of RC Slabs With the Use of High-Strength Concrete
R. Favre, H. Charif, and J. P. Jaccoud
Appears on pages(s):
concrete slabs; deformation; finite element method; silica fume; high-strength concretes; moment-curvature relationship; plasticizers; reinforced concrete; serviceability; structural analysis; tests; Structural Research
The objective of this paper is to show that the use of high-strength concrete (HSC) (especially concrete with silica fume) can notably reduce the long-term deformations of reinforced concrete (RC) slabs. This may be achieved by reducing creep deformation, increasing the elastic modulus, the tensile strength, and the steel-concrete bond properties. Moreover, this paper shows that the CEB (Comite Euro-International du Beton) moment-curvature relationship established for ordinary concrete is still valid for HSC. A procedure for the nonlinear finite element analysis of RC beams and slabs is briefly described. The proposed procedure is based on the nonlinear CEB moment-curvature relationship incorporated into an iterative secant stiffness algorithm. Predicted deflections from the proposed procedure are compared with experimental results from slabs made with ordinary or HSC.