Finite Element Analysis Of Precast Segmental Erection Piers

In recent years, with its high speed of construction、high quality、eco-friendly and less effect of the surrounding traffic, Precast technology has been more and more widespread used in bridge construction.As the substruction, Precast pier comply with the trend gradually.The development of precast pier construction have positive influence and great improve the level of our bridge construction.Usually,we use experimental study、analytic method、fiber model method and entity finite element method to research the structural performance of precast pier.whereby, the research that use entity finite element method is relatively less.Based on the research results by predecessor,this article have researched the structural performance of precast segmental pier that with different connection types by using finite element analysis software.The following points is research contents of this article:1.To build a cast-in-situ pier entity finite element model,and to get the analysis result by loding the model with load case that fit the norm.Checking the validity of the cast-in-situ pier entity finite element model by theoretical calculation and two-dimensional model,the purpose of research the structural performance of the cast-in-situ pier is to set a standard to compare with the structural performance of the precast segmental piers.2.To build precast segmental pier entity finite element model with dry joint and precast segmental pier entity finite element model with glue joint which have the same strength classes of concrete and reinforcement ratio as the cast-in-situ pier entity finite element model.To load the two kinds of precast segmental pier entity finite element model by the same load case that loading the cast-in-situ pier entity finite element model,analyze the results and compare the results of the two kinds of precast segmental pier entity finite element model with the results of the cast-in-situ pier entity finite element model,to research the different structural performance between them.3.To build three precast segmental pier entity finite element models with wet joint, the concrete on the stitching segment are in different age,this three precast segmental piers have the same strength classes of concrete and reinforcement ratio as the cast-in-situ pier. To load the three kinds of precast segmental pier entity finite element model by the same load case that loading the cast-in-situ pier entity finite element model, analyze the results and compare the results of the three kinds of precast segmental pier entity finite element model with the results of the cast-in-situ pier entity finite element model, to research the different structural performance between them.The thesis research is subsidized by Ningbo Bridge Technology and Technologic-al Innovation Team(2014B81003).