Research on Mechanical Characteristics of Reverse Arch Foundation Frame Bridges with Different Arch Axes
Based on the advantages of good overall integrity and high stiffness of the framework bridge,this study proposes a reverse arch framework bridge structure designed for deep-sea sedi-ment soft soil geological sites.To obtain a reasonable structural form,stress and deformation patterns of the reverse arch foundation framework bridge were analyzed.Based on this,the me-chanical properties of different arch axis bottom plates of the reverse arch framework structure were compared.Three types of reverse arch foundation framework bridge models were estab-lished using ABAQUS finite element software.Under the influence of structural self-weight and roadway loads,principal stresses,settlement,and deformation data were calculated.The results show that the maximum principal tensile stress occurs on the upper surface of the top plate con-nected to the bridge pier.The maximum vertical deformation occurs in the middle of the top plate span.The maximum longitudinal deformation occurs in the plastic hinge zone of the pier top.Under identical conditions,the maximum principal tensile stress,vertical,and longitudinal de-formations all occur in the circular arch axis bridge,at 2.272 MPa,2.428 mm,and 0.131 mm respectively.However,the maximum settlement appears in the parabolic arch axis bridge,at 6.913 mm.Therefore,the stress performance of the catenary arch axis bridge is relatively rea-sonable,with smaller structural deformations,making it more suitable for later application and promotion.Based on this,it is recommended to prioritize the use of the catenary arch axis bot-tom plate for the reverse arch foundation framework bridge during structural design,considering the structural stress and deformation characteristics.
reverse arch foundationframe bridgesfinite element methodstressdeformationdisplacement
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