Research on the Key Technique for Large Span Continuous Rigid Frame Bridge with High Piers
|School||Southwest Jiaotong University|
|Course||Bridge and Tunnel Engineering|
|Keywords||Continuous Rigid Frame Bridge High pier Internal forces Temperature effect Stability|
With the development of the cause of the bridge construction , continuous rigid frame bridge is also widely used and developed , and gradually to the large cross , gentle direction , so that the structural stability and temperature issues have become increasingly prominent , therefore , - span continuous the study of mechanical properties of rigid frame remained very necessary . The Chongqing in Fengjie Mugua River Bridge engineering background , combined with the characteristics of the design of Bridge Pier , comparative analysis of the case of different lengths with single box pier and double limb thin-walled pier 11 different types of piers of a bridge structure various mechanical properties . First calculate 11 different piers bending stiffness and the stiffness of the anti- push , on this basis , Chapter 3 different types of piers of a bridge structure in the largest stages of internal forces and deformation of the cantilever and the use of stage constant live load due to internal forces and deformation , and the form of a chart comparing the calculation results of the key sections and concluded ; Chapter 4 different types of piers bridge span structures by internal forces and deformation the nonlinear variable temperature after the pier with the longest cantilever stage , as well as the use of phase pier internal forces , and by the uniform temperature change and non-linear temperature change through the form of a chart comparing the calculation results of some of the key sections and concluded ; Chapter 5 different types of piers in the largest cantilever concluded by comparing different types of piers bridge across a first-order structural instability critical factor and different instability modes , stability and use phases . Concluded that the existing problems and the future development direction .