Naslov
3D Chemo-Thermo-Hygro-Mechanical Model for Concrete

Autori
Ožbolt, Joško ; Balabanić, Gojko ; Periškić, Goran

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

Izvornik
6th ICCSM Book of Abstracts / Ivica Smojver, Jurica Sorić - , 2009

Skup
6th International Congress of Croatian Society of Mechanics

Mjesto i datum
Dubrovnik, Hrvatska, 30.09.2009. - 02.10.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
chemo-hygro-thermo-mechanical model; concrete; finite elements

Sažetak
In the present paper a current status of development of a 3D numerical chemo-hygro-thermo-mechanical model for concrete is presented. In the model the interaction between the non-mechanical (distribution of temperature, humidity, oxygen and chloride) and mechanical properties of concrete (damage) is accounted for. The formulation of the model and its implementation into a 3D finite element code are briefly discussed. The formulation is restricted to the processes up to the depassivation of reinforcement. The application of the model is illustrated on one numerical example in which the transient 3D FE analysis of RC slab is carried out in order to demonstrate the influence of damage of concrete on depassivation time of reinforcement. In the analysis the load free and previously loaded RC slabs are exposed to the aggressive influence of sea water. Due to external load, the loaded slab was damaged before the exposure. Consequently, its depassivation time is much shorter than the depassivation time of companion slab, which was load free. The reason is due to the cracking of concrete, which significantly accelerate processes that are relevant for depassivation of reinforcement. The numerical results are in good agreement with experimental observations.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Temeljne tehničke znanosti

POVEZANOST RADA