| With the development of these years,we are lack of enough understanding about the stress of the single column pier bridges performance.The country have appeared more than single column pier bridge overall rollover accidents.Therefore,it’s particularly important to research of this kind of bridge of static analysis and reinforcement measures.At present,we have been gradually carried out the single column pier bridge resistive overturning stability of the work,and disposal of the need to repair the bridge.So in this context,the single column pier girder bridge rigidity analysis and reinforcement measures of the research has a strong practical value.Taking hebei province as an example of a bridge,its ability to resist capsizing,reinforcement scheme,and strengthening the nonlinear analysis of steel reinforced concrete plate beam structure are studied.This paper completed the following work:1.It Introduces the single column loading characteristics of curve bridge,calculation method and the factors that affect the mechanical characteristics.And briefly expounds the bridge reinforcement methods and principles.This paper was introduced in detail on used in steel,and the calculation method of steel reinforced concrete structure.It provides theoretical basis for single column pier girder bridge reinforcement calculation.2.Steel reinforced concrete structure are discussed in detail the bond-slip theory calculation,selection of material constitutive relationship.And using the large-scale finite element analysis software Midas/FEA model of steel reinforced concrete beam bending performance nonlinear full-range analysis.In this model,considering the bond-slip between steel and concrete bone’s influence on the structure,the correctness of the proposed model is verified by an experiment.That provide a theoretical basis for the design of steel reinforced concrete flexural members.3.In hebei province to a certain bridge as the engineering example,based on the calculation method and theory of single column pier bridge,the finite element software is adopted to establish the space model.And we analysis and find out the most unfavorable position of bearing.And we analysis bearing capacity of the bridge,concluded that(27)(28)5.23.1qf? it did not meet the requirements of rigidity and bearing the basis.In view of the bridge itself structure and the working situation,we has carried on the preliminary design of reinforcement scheme.4.We adopted to establish the space model of after reinforcement of the single column pier by Midas/FEA finite element analysis software.Studied the change of the stress and strain of steel bone of the ultimate bearing capacity of steel reinforced concrete plate beam.Through checking the evaluation and reinforcement schemes,it is concluded that the reinforcement scheme can improve the resistance performance of the bridge,the scheme is feasible.This provides a theoretical basis for the future similar to the analysis of the single column pier Bridges and reinforcement design. |
