Author(s)

C.E. Majorana & F. Pesavento

Abstract

Damage and spalling in HP and UHP concrete at high temperature C.E. Majorana\ F Pesavento* ' Dipartimento di Costruzioni e Trasporti, Universitd di Padova, Italy Abstract The present work deals with a new model to analyse the behaviour of concrete at high temperature. For the safety evaluation of concrete structures exposed to elevated temperature, for instance during a fire or in the case of nuclear accident, prediction of concrete performance is of great practical importance. In such conditions concrete, especially high performance and ultra high performance concrete, may be subject to spalling phenomena which jeopardizes the integrity of the construction. Spalling involves thermal, hygral and mechanical processes. Such complex phenomena require a numerical simulation implementing new mathematical models. In the model here presented concrete is considered as a multiphase material consisting of a solid phase, two gas phases and three water phases. The effect of dama

Keywords