Program implementation of quantifying the nonlinear time-dependent deformation of high concrete dams based on MSC.Marc

Abstract

Deformation is a comprehensive performance of concrete dam structures, especially the time-dependent deformation, a key index for evaluation of the structure behaviors, health status, and their evolution of a dam in long-term service. Aiming at the inherent time-dependent deformation behaviours of dam concrete and foundation rock, nonlinear time-dependent constitutive model is suitably established for the deformation of high concrete dams in this paper. Then, the time-dependent deformation equations for dam concrete and foundation rock in three-dimensional stress state are studied, and the corresponding segmentation criteria based on the Drucker-Prager yield function is proposed. On this basis, on the platform of the general commercial finite element software MSC.Marc, implementation method of the second development program of the established nonlinear time-dependent constitutive model is proposed. The correctness of the established model and its second development method based on MSC.Marc are verified by an example. The analysis and back analysis results of the inherent time-dependent deformation of a high concrete gravity dam show the engineering practicability of the established model.