Sigurnost i pouzdanost mostovskih konstrukcija Proračun parcijalnih i globalnog koeficijenta sigurnosti probabilističkim prilazom

摘要

In this article the examples of calculation, by means of The Theory of Probability and Applied Statistics, of the partial and the global safety factors of composite beams of bridge superstructures are presented. The partial and the global safety factors are calculated and analyzed for dead load of bridge superstructure and for life load from: l) PTP-5 Code; 2) DIN 1072 -1978; 3) vehicles in real moving traffic on this part of road; 4) The special vehicle with the exceptional heavy load. In the conclusion it is ponted out that the calculations of the partial and the global safety factors are necessary, but not sufficient requirements for the whole realization of conditions for entire construction and for it's every load bearing element. At last, it is emphasized that the composite beam of some bridge superstructure is needed to be calculated to carry standardized life load from DIN 1072 -1978, because such bridge construction is very well fitted to influences of real moving vehicles in traffic. In that way, safe, reliable and economical construction of bridge superstructure during its exploitation life of n = 100years can be received.%Mostovi kao sastavni delovi puteva izloženi su tokom vremena različitim uticajima vozila u pokretnom-saobraćaju. Pokretno saobraćajno opterećenje nekog mosta, kako znamo, zavisi od putnog pravca na kome se most nalazi, udaljenosti od gradskih i industrijskih centara, reljefa, klime, godišnjeg doba i drugih faktora na relaciji put-okolina-vozilo, tj. ima slučajan karakter i pokorava se zakonima teorije verovatnoće. Ako to imamo na umu, izučavanje uticaja opterećenja i otpornosti mostovskih konstrukcija je potrebno vršiti uz primenu zakona teorije verovatnoće i pri-menjene statistike.