Naslov
Deflection of reinforced concrete beams simultaneously subjected to sustained load and reinforcement corrosion

Autori
Grandić, Davor ; Bjegović, Dubravka ; Štimac Grandić Ivana

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Congress Papers ; Paper No 177 / G. C. Giuliani - Milano : SEWC, 2011, 1-12

Skup
Structural Engineers World Congress 2011

Mjesto i datum
Como, Italija, 04.04.2011. - 06.04.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
reinforcement corrosion; beam deflections; serviceability parameters; experimental research

Sažetak
The bearing capacity and serviceability of reinforced concrete structures can be severe deteriorated by steel reinforcement corrosion. Recent research results show that deterioration of serviceability of structures due to increasing of deflections begins much earlier than structural collapse. The results presented in this paper are a part of a comprehensive experimental research. In this experiment, chloride induced corrosion of reinforcement embedded in reinforced concrete beam specimens is accelerated with alternation of dry and wet periods with salt water in an environmental chamber. Such alternation of wet and dry periods simulates natural process of reinforcement corrosion in chloride environment. Beam specimens were simultaneously subjected to sustained load and reinforcement corrosion. In this paper the method for computing the long-term deflections of beams exposed to reinforcement corrosion is proposed. The serviceability parameters which consider effect of localized reinforcement chloride corrosion on tension stiffening and reduced stiffness of corroded reinforcement were introduced. Mentioned serviceability parameters are expressed as a function of corrosion state of reinforcement and evaluated by results of experimental research. Corrosion state of reinforcement can be determined by measuring of reinforcement corrosion rates during the time of exposure of reinforced concrete members to corrosive environment. The relationship between corrosion state of reinforcement and deflections is established and evaluated by test results.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA