Pregled bibliografske jedinice broj: 432126
Fracture of concrete at high loading rates
Fracture of concrete at high loading rates // 6th ICCSM Book of Abstracts / Ivica Smojver, Jurica Sorić (ur.).
Zagreb: Hrvatsko društvo za mehaniku (HDM), 2009. str. 51-55 (predavanje, međunarodna recenzija, sažetak, znanstveni)
CROSBI ID: 432126 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Fracture of concrete at high loading rates
Autori
Ožbolt, Joško ; Travaš, Vanja ; Kožar, Ivica ; Eligehausen, Rolf
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
6th ICCSM Book of Abstracts
/ Ivica Smojver, Jurica Sorić - Zagreb : Hrvatsko društvo za mehaniku (HDM), 2009, 51-55
ISBN
978-953-7539-10-8
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
fracture of concrete; high loading rates; microplane model
Sažetak
In the paper the results of numerical failure analysis of plain concrete beam loaded by impact three-point bending load are presented and discussed. The theoretical framework used in the numerical analysis is continuum mechanics, irreversible thermodynamics and finite element method. As a strain measure Green-Lagrange stain tensor is used. The constitutive law is based on the rate sensitive microplane model together with the co-rotational stress tensor. To assure objectivity of the analysis with respect to the size of the finite elements, crack band method is used. The contactimpact analysis is based on the mechanical interaction between two bodies – concrete beam (master) and dropping hammer (slave) falling at the mid span of the beam. The contact constrains are satisfied by Lagrange multiplier method, which is adapted for the explicit time integration scheme. The numerical results are evaluated, discussed and compared with test results known from the literature. It is shown that the beam resistance and failure mode depend on the loading rate. For lower loading rates beam fails in bending (mode-I fracture). However, with increase of loading rate there is a transition of the failure mechanism from bending to shear. The results are in good agreement with theoretical and experimental results known from the literature.
Izvorni jezik
Engleski
Znanstvena područja
Građevinarstvo, Temeljne tehničke znanosti
POVEZANOST RADA
Projekti:
114-0000000-3145 - Numerički 3D kemo-higro-termo-mehanički model betona (Ožbolt, Joško, MZOS ) ( CroRIS)
114-0982562-1460 - Fleksibilne duge konstrukcije: nelinearno modeliranje s vizualizacijom (Kožar, Ivica, MZOS ) ( CroRIS)
Ustanove:
Građevinski fakultet, Rijeka
