| Autor: |
Edson Denner Leonel, Julio Flórez-López, Carlos Alberto Caldeira Brant, Karolinne Oliveira Coelho, Edna Possan |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Building Pathology and Rehabilitation ISBN: 9783030473013 |
| DOI: |
10.1007/978-3-030-47302-0_1 |
| Popis: |
The objective of this work is to propose a mathematical model for the prediction of service life in reinforced concrete frames subjected to chloride corrosion and mechanical loading. Corrosion causes the reduction of the cross section of the steel bars and decreases the yield stress; mechanical loading produces concrete cracking and yield of the reinforcement. For the modeling of the structural behavior, this research is based on lumped damage mechanics. As a theoretical basis for the proposed mathematical model, some concepts and laws of the thermodynamics of frames are also introduced. The model proposed in this work is called elastoplastic with damage and corrosion, and the internal variables used are plastic rotation, damage level and corrosion level. The propagation of damage causes an acceleration of the evolution of corrosion and the constant that characterizes this relationship can be identified experimentally. The proposed model was used for the simulation of a reinforced concrete frame. In the example, corrosion evolution causes increments of cracking and the evolution of the damage accelerates the corrosion process. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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