STRUCTURAL-ANALYSIS AND REHABILITATION OF REINFORCED-CONCRETE SHELLS

This paper presents a structural analysis process and rehabilitation a pproach for damaged, pneumatically formed reinforced concrete shells. The process was applied to a seriously damaged, large-span, slender sh ell. Special nonlinear finite element modeling was used with doubly cu rved and multilayer elements. Security conditions of the reference she ll, including bulkling collapse and damage time evolution, were analyz ed; the shell exhibited unsafe behavior. The rehabilitation approach i s explained. Predictions of the model were compared with experimental in situ tests. Good agreement between the predicted and observed value s was obtained.