Stress characteristics of the polyurethane-modified epoxy resin bonding layer on the steel bridge deck

ZHANG Peng; LIU Benli; SHAN Jingsong; ZHAO Haijian; SONG Chengfa; CHEN Zixuan

doi:10.3969/j.issn.1672-0032.2024.03.011

Abstract：To analyze the force characteristics between the steel box girder pavement layer and the steel bridge deck bonding layer,a steel box girder bridge model is established using the finite element software ANASYS.Polyurethane-modified epoxy resin is used as the bonding layer for the steel bridge deck pavement structure.Various vehicle load conditions,steel bridge spans,pavement layer thicknesses,bonding layer thicknesses,temperature variations,and horizontal loads are simulated and analyzed to study the force effects on the bonding layer.The results indicate that under normal driving conditions,the transverse shear stress at the bonding layer interface is significantly greater than the longitudinal shear stress.The most unfavorable condition for the shear stress at the bonding layer interface is when the vehicle load acts between steel box girders and longitudinally away from the transverse diaphragm.When the load acts on the edge of the steel box girder and near the transverse diaphragm,the normal tensile stress between layers is most unfavorable.The span has little influence on the force of the bonding layer.As the thickness of the bonding layer increases,the shear stress at the interface decreases while the normal tensile stress increases.With the increase of pavement layer thickness,the transverse shear stress at the bonding layer interface and the normal tensile stress between layers decreases.With the rise in ambient temperature,the stress at the bonding layer interface significantly decreases.As the friction coefficient increases,the shear stress at the interface increases,while the normal tensile stress remains relatively unchanged.