affect its mechanical behaviour. The major phenomena which identified include the release and evaporation significant amount water that induce pressure gradients under towards the surface through pores. indicate that pore pressure built to spalling of high performance concrete structures at…
affect its mechanical behaviour. The major phenomena which identified include the release and evaporation significant amount water that induce pressure gradients under towards the surface through pores. indicate that pore pressure built to spalling of high performance concrete structures at elevated ~~ ... ,, ... ....,.~ ....... ~~ .. (Harmathy 1965, Meyer Ottens 1975, Zhukov 1976, Bazant et 1, Noumowe et al. 1996, Anderberg 1997). spalling phenomena are a major problem in the evaluation of the safety concrete structures such conditions. The issue of the prediction of pore pressure been investigated by several authors •. JU.L_. • ..., ...... et al. 1981, and Gluekler 1982, ....,...., ......... '"'"'·•"-+VJ. Kontani and Shah 1995, Jouhari and analysing spalling phenomena, most the have focused on the possible local mechanisms and are based on qualitative considerations. numerical modelling of the mechanical of pore pressures on the behaviour of concrete structures at elevated temperatures. framework of finite elements, a numerical been ........ ,'"' ...... '"""t:""" Majumdar et al ( 1995). this study, to behave elastically and pore pressure was as a direct ......... ..,...., ................ stress, regardless of the actual nature of concrete porous Following the same general approach, we here the first numerical study which aims at providing a allowing for the non-linear analysis of contribution of pore pressure in spalling 1-1 ....... ..., • .,_,_,.._.._,_...,.u .......