MODEL TO ANALYZE STRUCTURES SUBJECTED TO CHEMICAL-MECHANICAL STRESS

Renata Rauber Dahmer¹; Julio Flórez-López¹

¹ Universidade Federal da Integração Latino-Americana - UNILA

doi:10.20906/CPS/CILAMCE2017-0808

Resumo

Corrosion is one of the main pathological manifestations that the reinforced concrete is susceptible. However, there is no suitable methodology - at structural level - that includes the evolution of the damage caused by corrosion. The evaluation of the mechanical behavior of reinforced concrete can be performed based on the lumped damage mechanics through the implementation of plastic hinges and damage variables that describe the cracking, together with the principle of conservation of energy of thermodynamics, which allows the analysis of damage due to corrosion. Thus, the present work combined the lumped damage mechanics with the thermodynamics to analyze structures subjected to chemical-mechanical stress from the creation of a constitutive law of corrosion coupled to mechanical damage. The values obtained with the generated cracking model coupled to corrosion were compared to experimental results available in the literature for simple structures and satisfactory results were obtained.

Palavras-chave: lumped damage; reinforced concrete; corrosion