Research On Seismic Behavior Of Continuous Beam Bridge Suspension Pipes

The continuous girder bridge hanger pipe belongs to the ancillary structure of the bridge.The characteristics of the pipeline are non-uniform spectrum,greater flexibilit y,low damping,and low natural frequency.When an earthquake occurs,the hanger pi pe attached to the main bridge may be damaged,which will have a serious impact on people's lives.At present,there is very little analysis of the seismic resistance of the c ontinuous girder bridge piping system.The seismic design of the auxiliary structure of the bridge has no specific reference and can only refer to the relevant specifications.Therefore,the dynamic characteristics of the support and hanger pipes on the auxiliar y bridge are analyzed.The research on seismic response and seismic design methods has important theoretical significance and practical engineering reference value.In this paper,a series of literatures and relevant standards are read to study the vi bration elimination measures,hazards,and root causes of pipeline vibration.In order to study the force characteristics of continuous girder bridges and hanger s under earthquakes,midas finite element analysis software was used to analyze the el astoplasticity of continuous girder bridges.The displacement and acceleration respons e time curves of the structure were obtained through the action of seismic waves;The method of floor response spectrum is to input the floor response spectrum to the conti nuous beam bridge subsidiary support and hanger pipe model,and numerically simula te the displacement and acceleration time history curve of the auxiliary beam hangers of the continuous beam bridge.Under the action of horizontal earthquakes,the calculation formulas of the sub-su pports for continuous girder bridges are established with the single-degree-of-freedom system and multi-degree-of-freedom system.Taking the 40m+56m+40m continuous girder bridge attached to its support and hanger pipe as an example,its structure is stu died.Self-vibration characteristics;Study of seismic responses of continuous girder br idge support and hanger pipes under different pipeline parameters and different seismi c waves.The midas finite element analysis software was used to simulate the data obtained from the analysis of the seismic effects and related suggestions were made for the we ak parts of the support and hanger pipes.