Naslov
Three-axial stress state material validation by PRECON3D

Autori
Galić, Mirela ; Marović, Pavao

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

Izvornik
Book of Abstracts / Onate, Eugenio ; Owen, Roger ; Perić, Đorđe ; Suarez, Benjamin - Barcelona : International Center for Numerical Methods in Engineering (CIMNE), 2013, A636-1

Skup
12th International Conference on Computational Plasticity: Fundamentals and Applications

Mjesto i datum
Barcelona, Španjolska, 03.09.2013. - 05.09.2013

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
three-axial stress state; numerical model; concrete model; validation; finite element method

Sažetak
We have developed so called Modified Mohr-Coulomb – Rankine material model for concrete considering all dominant influences in concrete: yielding in compression, fracture in tension, softening and hardening, i.e. a three-dimensional elasto-plastic material model which is based on the Mohr-Coulomb criterion for dominant compression stresses and the Rankine criterion for dominant tension stresses. The model is defined by elementary material parameters (Young’s modulus of elasticity, Poisson’s coefficient, maximal uniaxial tensile and compression stresses, coefficient of tensile correction, maximal tensile and maximal compression strains). A multi-surface presentation of the model is implemented which permits the rapid convergence of the mathematical procedure. The presented material numerical model for concrete is incorporated into developed computer programme PRECON3D for the three-dimensional analyses of reinforced and prestressed concrete structures where the structures are discretized by three-dimensional finite elements with an embedded one-dimensional element of reinforcement and prestressed tendons. Considering triaxial stress state, we will performed parametric analyses varying the size (decimal grade scale) and the orientation of these three stresses (σx, σy and σz) in three perpendicular planes obtaining stress states in eight octahedrals (tension-tension-tension (t-t-t), t-t-c, t-c-t, t-c-c, c-t-t, c-t-c, c-c-t, and compression-compression-compression (c-c-c)). So, the paper will present the validation of developed material numerical model and the obtained results will be compared with the known numerical and experimental ones. It is concluded that the presented material numerical model incorporated into developed computer programme can be effectively used in the nonlinear analysis of reinforced and prestressed concrete structures.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Temeljne tehničke znanosti

POVEZANOST RADA