Naslov
Finite element analysis of posttensioned concrete structures

Autori
Nikolić, Željana ; Mihanović, Ante

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

Izvornik
1st Congress of Croatian Society of Mechanics / Sorić, J ; Vranković, N. - Zagreb : Hrvatsko društvo za mehaniku (HDM), 1994, 87-94

Skup
1st Congress of Croatian Society of Mechanics

Mjesto i datum
Pula, Hrvatska, 09.1994

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
posttensioned structures; prestressed losses; tendon; reinforcing bar

Sažetak
This work presents a non-linear numerical model developed for the computations of posttensioned plane structures. Generally curved prestressing tendons and reinforcing bars are embedded into the concrete and they are modelled independently of the concrete element mesh using 1D curvilinear elements. Among the losses which influence the decrease in the prestress force, it is possible to compute the losses caused by friction between tendons and the concrete, the losses which result from the concrete deformation and the losses in the anchorage zone. The computation for posttensioning structures is organized in phases. In the phase which precedes the prestressing of the tendons the structure is computed taking into account the dead load and one part of the permanent load. In the prestressing phase the tendons are tensioned individually. The prestress force can be applied at once or incrementally. In the third phase, which follows the tensioning of all tendons, the structure is computed taking into account the remaining part of the dead load and the live load. Certain possibilities of the developed model have been illustrated on one numerical example from literature.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

POVEZANOST RADA