Nonlinear Behavior of Concrete Dams Using Damage Mechanics
by Faouzi Ghrib, (Grad. Student, Dept. of Civ. Engrg., Ecole Polytechnique, P.O. Box 6079, Station “Centre Ville” Montreal, Quebec, Canada H3C 3A7) and René Tinawi, (Prof., Dept. of Civ. Engrg., Ecole Polytechnique, P.O. Box 6079, Station “Centre Ville” Montreal, Quebec, Canada H3C 3A7)
Journal of Engineering Mechanics, Vol. 121, No. 4, April 1995, pp. 513-527, (doi: http://dx.doi.org/10.1061/(ASCE)0733-9399(1995)121:4(513))
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| Document type: |
Journal Paper |
| Abstract: |
This paper presents damage-mechanics-based models for predicting the nonlinear static response of unreinforced concrete dams. An anisotropic formulation of the damage because of cracking is proposed. It leads to a reasonable finite-element mesh size. Correct convergence of energy dissipation is ensured by using the energy equivalence concept. The proposed expression for the evolution of damage is a function of the basic properties of concrete strength, f′c and fN′t, and the fracture energy Gf. Three examples are presented to illustrate the performance and accuracy of the proposed formulation. The first example compares the numerical results with experimental measurements obtained from a reduced model of a concrete dam. The second example uses Koyna dam as a test case to compare the damage mechanics theory with other theories on cases of reservoir overflow. The last example investigates the influence of initial damage on the seismic response of a gravity dam analyzed using the equivalent static loads. |
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