Multi-scale Mechanical Simulation Analysis of Open Ribbed Orthotropic Steel Deck System
The structure of orthotropic anisotropic steel bridge deck is complex,and the local fatigue stress is associated with the structural form of longitudinal ribs and the structure of pavement layer.In order to study the mechanical property characteristics of open-rib orthotropic steel bridge deck and pavement structure system,ABAQUS finite element software is used to establish bridge segmental model,simulate different structures,load level,pavement thickness and material modulus,and analyze the influence of stress distribution of rib L + small transverse rib steel bridge deck system.The results show that:1)The paving tensile strain of L rib + small transverse rib is reduced by 10%,compared with the closed rib,and the stress and vertical deformation of steel plate are reduced by about 50%,the most unfavorable longitudinal position of open rib is at the small transverse rib across the span,and the transverse position is at the welded seam of steel plate.When the paving thickness is increased by 4 cm,the paving transverse tensile strain and transverse shear stress are reduced.When the paving modulus is increased to 40 GPa,the maximum transverse tensile strain on the paved surface is significantly reduced,and the inter-rib deflection was double reduced.
orthotropic steel bridge panelopen ribmulti-scalefinite elementfinite element simulation
NETL
NSTL
万方数据
