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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of Braking Load on Longitudinal Forces in Continuous Welded Rail Considering the Presence of Bridge
Need for a high-speed rail demands the continuous welded rail (CWR) to be continued on the bridge to make a smooth track eliminating special expansion joints (SEJs). Braking load is an important consideration for the design of railway bridges. Being a slender steel structure, CWR is prone to buckling and fracture due to compressive and tensile rail stresses, respectively. Track bridge interaction (TBI) phenomenon results in additional rail stress, which varies along the track–bridge portion of CWR. This paper investigates TBI due to braking load. Effect of braking load on the rail stress and the longitudinal support reaction of the bridge pier have been investigated. A numerical model developed for track–bridge interaction in SAP2000 is extended to study the effect of braking load in the presence of ballasted CWR track. UIC 774-3R Code guidelines are followed while modeling the phenomenon. When compared to a bridge with special expansion joints, a significant portion of the braking load is dissipated in the approach zone of the bridge as a result of track–bridge interaction for all span lengths. The longitudinal support reaction at the fixed end pier of the bridge support is also affected significantly.
Effect of Braking Load on Longitudinal Forces in Continuous Welded Rail Considering the Presence of Bridge
Need for a high-speed rail demands the continuous welded rail (CWR) to be continued on the bridge to make a smooth track eliminating special expansion joints (SEJs). Braking load is an important consideration for the design of railway bridges. Being a slender steel structure, CWR is prone to buckling and fracture due to compressive and tensile rail stresses, respectively. Track bridge interaction (TBI) phenomenon results in additional rail stress, which varies along the track–bridge portion of CWR. This paper investigates TBI due to braking load. Effect of braking load on the rail stress and the longitudinal support reaction of the bridge pier have been investigated. A numerical model developed for track–bridge interaction in SAP2000 is extended to study the effect of braking load in the presence of ballasted CWR track. UIC 774-3R Code guidelines are followed while modeling the phenomenon. When compared to a bridge with special expansion joints, a significant portion of the braking load is dissipated in the approach zone of the bridge as a result of track–bridge interaction for all span lengths. The longitudinal support reaction at the fixed end pier of the bridge support is also affected significantly.
Effect of Braking Load on Longitudinal Forces in Continuous Welded Rail Considering the Presence of Bridge
Lecture Notes in Civil Engineering
Madhavan, Mahendrakumar (Herausgeber:in) / Davidson, James S. (Herausgeber:in) / Shanmugam, N. Elumalai (Herausgeber:in) / Mubarack, C. K. Ali (Autor:in) / Upadhyay, Akhil (Autor:in)
Indian Structural Steel Conference ; 2020 ; Hyderabad, India
Proceedings of the Indian Structural Steel Conference 2020 (Vol. 2) ; Kapitel: 40 ; 499-507
23.08.2023
9 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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