Durability design of concrete structures, Part 2: Modelling and structural assessment

Abstract

This paper is a sequel to [19] where the theoretical foundations were given for the analysis of durability of concrete structures. An overview of some approaches to modeling the durability of RC structures is given in the paper. Experiences resulting from experimental and numerical research of some influential parameters leading to corrosion of the reinforcement, cracks and delaminating of the surrounding concrete, which leads to the decrease of service life of the RC structure's elements, are described in details. Methodologies of structure evaluation presented in this paper are based on assessment of critical influential parameters and represent a methodology of reasonable maintenance of an engineering construction, i.e. reasonable service life of the structure. The methods are based on analysis of conditions and performance (Condition Rating Method and Performance Rating Method). The results of ratings of concrete structures in the industrial zone of the city of Tuzla are presented in the final part of the paper.Ovaj rad predstavlja nastavak rada [19], u kojem su date teoretske osnove za analizu trajnosti betonskih konstrukcija. U radu je dat pregled nekih pristupa modeliranja trajnosti armiranobetonskih konstrukcija. Detaljno su opisana iskustava sprovedenih eksperimentalnih i numerickih istrazivanja pojedinih uticajnih parametara, koji dovode do korozije armature, prslina i delaminacije okolnog betona, sto dovodi do smanjenja eksploatacionog veka elemenata RC konstrukcije. Ova analiza je neophodan korak za adekvatan pristup oceni konstrukcije. Metodologije procene konstrukcije, prezentirane u radu, zasnivaju se na oceni kljucnih uticajnih parametara i predstavljaju metodologiju za racionalno odrzavanje gradjevinske konstrukcije, odnosno racionalan eksploatacioni vek konstrukcije. Date su metode zasnovane na analizi uslova i performansi (Condition Rating Method, Performace rating Method). Na kraju rada dati su rezultati procene betonskih konstrukcija u industrijskoj zoni grada Tuzle.