Influence Analysis of Design Parameters on Mechanical Properties of Continuous Beam Arch Composite Bridge
By using the theory knowledge to design the dead load and live load test,the two important design parameters of the arch bridge,the ratio of vector span and the ratio of stiffness,are compared and analyzed as the test variables,the relationship between me-chanical properties and design parameters of continuous beam-arch composite bridge is studied.The results show that:Under the ac-tion of dead load,when the ratio of side-span to side-span increases when the ratio of middle-span to side-span is the same,the ratio of side-span to side-span will increase,for the main beam,the axial force of the mid-span is almost unchanged,while the axi-al force of the side-span is decreasing,the axial force of side span has no obvious side,but the axial force of side span of main beam decreases,and the bending moment of side span and middle span of main beam has little influence.Under the constant stiffness of the arch rib,the axial force of the side-span main beam decreases with the decrease of the rigidity of the main beam,while the axial force of the middle-span main beam increases,with the decrease of the stiffness of the main beam,the bending moment of the middle span decreases,while the negative bending moment of the side span decreases and the positive bending moment increases,for the moment value,the corresponding moment values of both the mid-span and the side-span beams are decreasing.
continuous beam-arch composite bridgemechanical propertiesvector span ratiostiffness ratio
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