Analysis of Temperature Effect Damage of Steel Structure Canopy on High-Speed Railway Platforms in Severe Cold Regions
The steel structure canopy of high-speed railway platforms in severe cold areas is extremely sensitive to temperature effects.Seasonal temperature differences can cause significant stress and deformation in the structure,leading to structural damage and affecting the safety of railway operation.To investigate the causes of damage to the steel structure canopy of high-speed railway platforms and the mechanical properties of steel structures under temperature effects,a canopy model was established using Midas/Gen finite element analysis software against the background of a certain high-speed railway platform steel structure canopy damage.By setting temperature load variables under different working conditions,the impact of temperature changes on the steel structure was studied and its damage mechanism was explored.The results indicate that temperature changes can cause changes in the shear and tensile states of the canopy bolts,with a significant increase in shear force and susceptibility to brittle failure at low temperatures;when the temperature is raised or lowered,the stress of the canopy truss members changes significantly,which can cause the stress ratio of the truss members to exceed the limit and lead to cracking of the members in this area.By taking measures to release the bolt constraints at the purlin bracket and purlin nodes,the stress and shear force on the purlin trailer can be significantly reduced.Under temperature rise and fall conditions,the purlin trailer will not be damaged and can meet the requirements for platform canopy use.
severe cold areahigh-speed railway platformsteel structure canopytemperature effectdamage analysis
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NSTL
万方数据
维普
