Comparative Study On Mechanical Properties Of Assembly Bridge Piers With Different Structures

Prefabricated construction technology application is more and more widely in bridge construction,prefabricated bridge pier compared to conventional masonry piers and comparable to in situ bridge pier construction progress quickly occupied area smaller influence on traffic advantages of little pollution to the environment but as a result of the existence of prefabricated bridge pier with joints,mechanical properties,therefore,there may be a problem in prefabricated bridge pier in order to be able to more widely application,to the mechanical properties of the fabricated bridge pier is needed to be further research.Based on this,this paper selected four kinds of commonly used prefabricated bridge pier,respectively is the socket type pier post-tensioned prestressed pier grouting sleeve and flange connection bridge piers using finite element analysis software ABAQUS finite element model of entity set up their respectively,apply appropriate boundary conditions and external loads,respectively from the level of the vertical bearing capacity of the bearing capacity of hysteretic performance from three aspects to compare different seam structure on the mechanical behavior of prefabricated bridge pier.Through the results of finite element analysis,the difference of their mechanical properties for their vertical bearing capacity is obtained.From large to small,the normal post-tensioned prestressed pier is connected with the flange connecting pier grouting sleeve connecting pier.The horizontal bearing capacity is compared from three aspects: ductility coefficient of yield stiffness displacement and post-yield stiffness ratio.The yield stiffness is from large to small in order of grouting sleeve pier common pier flange connecting pier post-tensioned prestressed pier socket pier;The displacement ductility coefficient is from large to small in order is the socket pier flange connection pier grouting sleeve pier common pier post-tensioned prestressed pier;The stiffness ratio after yielding is from large to small in order of the hysteresis performance of the post-tensioned prestressed pier of the common pier connected with flange to the hysteresis energy dissipation capacity and residual displacement.The hysteresis energy dissipation capacity is from large to small in order of ordinary pier post-tensioned prestressed pier grouting sleeve pier flange connecting pier socket pier pier;Positive residual displacements are in order from large to small post-tensioned prestressed pier common pier flange connecting pier grouting sleeve pier socket pier,negative residual displacements are in order from large to small socket pier grouting sleeve pier flange connecting pier post-tensioned prestressed pier common pier.