Vol.9, No 2, 2011 pp. 217 - 229
UDC
624.072.22:624.042:531.1=111
DOI: 10.2298/FUACE1102217P
DETERMINATION OF THE LIMIT LOAD OF STATICALLY INDETERMINATE TRUSS GIRDERS
Žarko Petrović1, Bojan Milošević2, Marina Mijalković1, Stanko Brčić3
1University of Niš, The Faculty of Architecture and Civil Engineering, Serbia
2High Civil Engineering – Geodetic School, Belgrade, Serbia
3University of Belgrade, The Faculty of Civil Engineering, Serbia
The paper presents the procedure of limit load calculation of elasto-plastic trusses exposed to the action of proportional load which is gradually increased until the formation of failure mechanism. The calculation is based on the application of static and kinematic theorem of limit analysis which are the basis of the limit analysis of structures which produce the value of the limit load in a quick and efficient manner. Application of these theorems is displayed on the examples of truss girders loaded by one- and two- parameter load.
Key words:
limit load, static theorem, kinematic theorem, truss girders.
ODREĐIVANJE GRANIČNOG OPTEREĆENJA STATIČKI NEODREĐENIH REŠETKASTIH NOSAČA
U radu je prikazan postupak proračuna graničnog opterećenja elasto-plastičnih rešetkastih nosača izloženih dejstvu proporcionalog opterećenja koje se postepeno povećava sve do formiranja mehanizma loma. Proračun je baziran na primeni statičke i kinematičke teoreme granične analize koje predstavljaju osnovu granične analize konstrukcija kojima se na brz i efikasan način dolazi do veličine graničnog opterećenja. Primena ovih teorema je prikazana na primerima rešetkastih nosača opterećenih jedno i dvoparametarskim opterećenjem.
Ključne reči:
granično opterećenje, statička teorema, kinematička teorema, rešetkasti nosači
