Constitutive Models for Concrete and Finite Element Analysis of Prestressed Concrete Reactor Vessels

摘要

Two constitutive models for concrete are discussed. For short-term loads, the orthotropic variable modulus model is described. For long-term loads a viscoelastic model utilizing a Dirichlet series approximation for the creep compliance function is summarized. The orthotropic variable modulus model is demonstrated in an analysis of a PCRV head with penetrations. The viscoelastic model is illustrated with a simulation of a prestressed concrete cylinder subject to non-uniform temperatures. (ERA citation 03:010156)