Naslov
Nonlinear Time-dependent Analysis of Prestressed Concrete Shells

Autori
Radnić, Jure ; Matešan, Domagoj

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

Izvornik
Abstract book ACE-X 2009 / - , 2009, 165-165

Skup
3nd International Conference on Advanced Computational Engineering and Experimenting

Mjesto i datum
Rim, Italija, 22.06.2009. - 23.06.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Prestressed concrete shell; Numerical model; Long-term load; Short term load; Creep; Shrinkage

Sažetak
The model for the numerical analysis of prestressed concrete plates and shells under the short‐term and long‐term static loads was presented. The material and geometric structure nonlinearities were modelled. It is possible to simulate the dominant nonlinear effects of concrete: the creep, shrinkage, aging, the development of cracks in tension and yielding in compression, as well as the changes in the tensile and shear stiffness of cracked concrete. Reinforcing steel is modelled as a separate layer with anisotropic material properties, with a possibility to transfer the stresses in the reinforcement bars direction only. Prestressing tendon is simulated by 1‐D curved finite element embedded in the shells finite element. The numerical procedures, which describe the prestressing contributions and time‐dependent analyses, are discussed. The numerical model simulates the prestressing losses that occur during and after the prestressing. A distinction has to be made between pre‐tensioned and post‐tensioned structures, in order to take into consideration the immediate prestressing losses. The numerical model is verified by results of the experimentally tested prestressed concrete shells (see Fig.1).

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA