Restraint System Design Scheme of High Pier and Long Span Continuous Rigid Frame of High Speed Railway
In order to determine a more reasonable restraint system of high piers and long span continuous rigid frame of high speed railway,the main bridge of the Toudao Songhua River super large bridge on the Shenyang-Baishan high speed railway,a continuous rigid frame with a span of(75+136+136+75)m,was taken as the research object.A full-bridge spatial finite element model was established by using MIDAS/Civil to investigate and analyze the internal forces,stiffness,creep,track regularity,and economy of the structure under the single restraint system,double restraint systems,and triple restraint systems.The results indicate that in terms of the internal forces of the main girder and main piers,the internal forces of the triple restraint systems are the greatest,those of the single restraint system are the smallest,and those of the double restraint systems are intermediate.In terms of stiffness,the overall stiffness of the triple restraint systems is the largest,that of the single restraint system is the smallest.that of the double restraint systems is intermediate.In terms of creep,when the creep requirements are satisfied,the required beam height of the structure in the single restraint system is less than that in the double restraint systems,which is less than that in the triple restraint systems.In terms of track regularity,when checked using the midpoint chord measurement method and the vector difference method,all three systems meet the specification requirements.When checked using the vertical curve radius method,the required beam height of the structure in the single restraint system is less than that in the double restraint systems,which is less than that in the triple restraint systems.In terms of economy,the economy of the double restraint systems is superior to that of the single restraint system.
high speed railway bridgehigh piercontinuous rigid framerestraint systemstiffnesstrack rregularity
万方数据
维普
