Wavelength Characteristics of Vertical Deformation and Train Dynamics Simulation of Long-Span Cable-Stayed Bridges under Complex Loads

• DOI: 10.20944/preprints202408.2146.v1
• Publication Date: 2024-08-30T00:34:50Z
• Authors: Zhiqiang Pang; Mangmang Gao; Guolong Li; Jingjing Yang; Fei Yang
• Keywords: Bridge (graph theory); Smoothness; Slab; Structural load

Ballastless track has high smoothness, but the laying requirements are strict. Therefore, maximum span of cable-stayed bridges ballastless tracks is 392m. For structures over larger spans, deformation characteristics long-span Bridges under complex loads incomplete, and interaction between bridge-track unclear. The influence wavelength cosine wave on track- bridge mapping different orbital was explored. vertical were investigated. track-bridge integrated model for establish to analyze relationship rail deformation. Based relationships deformation, Train-Track-Bridge dynamic simulation simplified. results show that when minimum surpasses 6 m, 10 16 in ballasted track, longitudinal-connected unit slab-type accurately mirrors bridge. ranging from 200 m 600 ranges 21 1270 loads. During local loads, below constitutes a significant proportion near pie. Considering train vibration response, Train-Bridge coupling can be employed treat structure as load reduce complexity enhance calculation efficiency.