Research on the Reinforcement Method for Improving the Overall Performance of the Suspension Arch Bridge without Longitudinal Stiffened Beams
In order to solve the problem that the suspension rod of the non-stiffened longitudinal beam boom arch bridge has the risk of falling beams on the upper bridge deck,a reinforcement scheme that steel longitudinal beams was added to the non-stiffened longitudinal beam boom arch bridge to increase the overall performance was put forward.Using the finite element numerical simulation method,the variation law of the steel longitudinal beam before and after the broken cable with the increase of throughput length and load adaptation is analyzed,after adding the steel longitudinal beam connection to the boom beam.The newly proposed design scheme of additional steel longitudinal beams is analyzed and verified.The results show that:1)The increased through-length stiffened steel longitudinal beams meet the design strength requirements under normal use and broken cables;2)By transforming the sidewalk into a steel structure,the load adaptation is comparable to the original design load,which ensures that the force state of the arch ring is basically unchanged after the transformation;3)The overall performance enhancement program of the suspension arch bridge without stiffened longitudinal beams is feasible,which can be used as a reference for similar bridges to enhance their overall performance.
highway bridgereinforcement of suspension arch bridgenumerical calculationsuspension rod crossbeamlongitudinal steel beamreplacement of suspension cable
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