Open AccessImpact characteristics of railway bridge with double-block supported track considering carriage oscillation loads
Author(s) -
Yuchen Wang,
Zhi Sun
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1545/1/012007
Subject(s) - bending moment , structural engineering , oscillation (cell signaling) , track (disk drive) , bridge (graph theory) , moving load , beam (structure) , harmonic , offset (computer science) , engineering , computer science , acoustics , physics , finite element method , mechanical engineering , medicine , genetics , biology , programming language
In this study, the impact characteristics of a typical railway bridge with ballastless double-block supported track under moving train considering carriage oscillation load is investigated. The train load is modelled as a constant force superimposed with a harmonic force whose frequency is the heaving oscillation frequency of the carriage. The bridge-track system is discretized and modelled using the double-beam elements connected using the elastic springs and viscous dampers. Numerical computations are conducted to investigate the bending moment impact characteristics of the supporting bridge considering the variations of moving speed and oscillating frequency of the moving load. The result shows that the harmonic loads due to the carriage heaving oscillation will induce some important bending moment impact amplification and peak response offset for the studied bridge in operation.