| In order to study the performance of load lateral distribution and dynamic impact of steel-box-concrete composite girder with corrugated steel webs bridge,refer to the engineering practice of the Southern Interchange Airport connecting line in Lanzhou New District.Through theoretical derivation,establishment of finite element model and MATLAB self-programming,the performance of load lateral distribution and dynamic impact of steel-box-concrete composite girder with corrugated steel webs bridge were studied and analyzed.The main research contents are as follows:(1)Using the Energy-method,the deflection calculation formula of the steel-box-concrete composite girder with corrugated steel webs bridge under eccentric load is deduced,and the transverse distribution coefficient of mid-span load is solved by the proportional relationship of deflection.The comparative analysis between them verifies the correctness of the derived formula and the accuracy of the calculation results.(2)Considering comprehensively the effects of the number of main beams,the form of cross-connection between boxes,the arrangement of cross-connection between boxes and the cross-beam damage on the load,the span of the steel-box-concrete composite girder with corrugated steel webs bridge,the finite element analysis software ANSYS 131 finite element models were established and the correctness of the modeling method was verified by using measured data.According to the lateral load distribution coefficients under the influence of various factors,the lateral load distribution law of steel-box-concrete composite girder with corrugated steel webs bridge under the influence of various factors is analyzed.(3)Using the numerical regression method for the load lateral distribution coefficient solved by the finite element method,the calculation formula of the load lateral distribution coefficient of the steel-box-concrete composite girder with corrugated steel webs bridge considering multiple factors was fitted and verified to be correct and calculation accuracy.(4)Comprehensive consideration is given to the span,number of main girders,cross-connecting form between boxes,cross-connecting arrangement between boxes,cross-connecting damage between boxes,road surface smoothness,driving speed and vehicle model's deflection and dynamic deflection of steel-box-concrete composite girder with corrugated steel webs bridge for the impact coefficient,the dynamic deflection and impact coefficient were calculated by the finite element model and MATLAB self-programming,and the calculation results were analyzed and compared.The steel-box-concrete composite girder with corrugated steel webs bridge under various factors was obtained.Variation of dynamic deflection and impact factor. |
PDF Full Text Request