Predstavljen je proračun najpovoljnijeg oblika osi luka mosta, koristeći uvjet da moment savijanja od
stalnog opterećenja iščezava u svim presjecima. Za danu geometriju prepreke proračunani su oblici luka za
različite visine strjelice luka. Nakon toga određene su rezne sile i reakcije u potporama pomoću kojih je određena
najpovoljnija strjelica luka i pripadni oblik. Rezne sile su proračunane na štapnom modelu luka koristeći
programski paket SAP2000. Opterećenje koje je uzeto u obzir je vlastita težina rasponske konstrukcije koja je
pretpostavljena kao rebrasti presjek s pripadnom opremom mosta (ograda, vijenac, pješački hodnik, rubnjak,
slojevi kolnika), težina nadlučnih stupova i luka čiji je oblik pretpostavljen kao šuplji pravokutni presjek. Prometno
opterećenje i ostala opterećenja ne ulaze u početni proračun, već se koriste u daljnjem proračunu luka na temelju
čega se vrše dodatne ispravke oblika.Calculation of the optimum axis shape of the arch bridge is presented using a condition which implies
that the bending moment due to dead load is equal to zero in every all arch sections. For a given geometry of the
obstacle different types of arch shapes for different arch elevations were calculated. After that, internal forces in
the arch and supports forces were calculated by which optimum shape of the arch is determined. Forces were
determined on the beam model of the arch using software package SAP2000. The load taken into account was a
self-weight of the superstructure that is assumed as a ribbed cross-section with adequate bridge equipment
(guard rail, facia, footway, curb, and roadway) and self-weight of arch and arch columns which are assumed to be
of a hollow rectangular cross-section. Traffic and other loads didn’t taken into account in preliminary calculations
but they are used in further design and based on them axis form is corrected
