o:3147 Parametric Study of Additional Temperature Stresses in Continuously Welded Rails on Steel Truss Railway Bridges en Abstract: Additional temperature stresses in continuously welded rails (CWRs) are caused by track/bridge interaction (TBI) due to thermal actions. Exceeding permissible stresses in CWRs on the bridge can lead to track buckling or rail cracking, compromising the safety of railway traffic. The main aim of the conducted study is to determine the effects of the key parameters such as rail cross-sectional area, track longitudinal resistance, bridge expansion length, and longitudinal stiffness of the fixed bridge support on the reduction of additional temperature stresses in CWRs on steel truss railway bridges. To quantify the effects of these parameters, two steel railway bridges with CWRs and the maximum expansion lengths according to UIC Code 774-3 were analyzed: (1) simply supported truss bridge with expansion length of 60 m and (2) continuous truss bridge with expansion lengths of 2 _ 60 m. According to the obtained results, the track longitudinal resistance had the most significant impact on additional temperature stresses in CWRs, leading to their reduction of up to 72%. The bridge expansion length and the rail cross-sectional area led to reductions of up to 25% and up to 18%, respectively. Considering the deformation criteria of TBI, the longitudinal stiffness of the fixed bridge support had a minor effect on the reduction of additional temperature stresses in CWRs. railway; continuously welded rail; track/bridge interaction; thermal action; numerical modeling; finite element method 1552101 2075-5309 1552102 https://doi.org/10.3390/buildings13092296 2023-10-30T09:42:43.243Z 44 no 46 Nikola Mirković Faculty of Civil Engineering, University of Belgrade Marija Nefovska-Danilović Faculty of Civil Engineering, University of Belgrade person Maja Ahac Faculty of Civil Engineering, University of Zagreb person Stjepan Lakušić Faculty of Civil Engineering, University of Zagreb person Uroš Mirković Institut za vodoprivredu "Jaroslav Černi" person 0000-0001-6781-5798 Zlatko Zafirovski Faculty of Civil Engineering, Ss. Cyril and Methodius University in Skopje person application/pdf 9509455 https://unilib.phaidrabg.rs/o:3147 no yes 16 70 1552253 71A04 Buildings 13 2296 1 22 MDPI, Basel, Switzerland 2023 Received: 1 August 2023 Revised: 1 September 2023 Accepted: 5 September 2023 Published: 9 September 2023