Naslov
Finite-discrete element modelling of spatial reinforced concrete structures

Autori
Živaljić, Nikolina ; Nikolić, Željana ; Smoljanović, Hrvoje

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
9th International Congress of Croatian Society of Mechanics / Marović, P. ; Krstulović-Opara, L. ; Galić, M. - Split : Hrvatsko društvo za mehaniku (HDM), 2018, 105-105

Skup
9th International Congress of Croatian Society of Mechanics (ICCSM 2018)

Mjesto i datum
Split, Hrvatska, 18.09.2018. - 22.09.2018

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Combined finite-discrete element method ; Reinforced concrete structures

Sažetak
Monitoring of the behavior of the structure before and after the failure, including the transition from continuum to discontinuum, is very important in the modeling of the load capacity and collapse of reinforced concrete structures subjected to extreme loads. Numerical model presented in this paper was developed with the aim of modelling and monitoring the behavior of reinforced concrete spatial structures exposed to static and dynamic loads. The model is based on combined finite-discrete element method (FDEM) which has become an excellent tool to address a wide range of problems involving fracturing and fragmentation of solids. In presented numerical model, four-node tetrahedron finite elements of concrete and two-node finite elements of reinforcing bar are used to model the behavior of the material up to the cracking of concrete. Fracture and fragmentation as well as material nonlinearity are described with contact elements for concrete and contact element for reinforcing bars which are implemented within the finite element mesh. The continuity between the reinforcing bar finite elements and concrete tetrahedron finite elements in the pre-failure stage is ensured through the penalty method. The model, implicates few numerical algorithms which are based on approximation of the experimental curves for material behaviour of the concrete and steel and are important for description of main non- linear effects in reinforced concrete structures. Verification and validation of the presented model are shown in several examples.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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