Internal Force Analytical Mode And Contrast Of Rigid-frame Arch Bridge Of Reinforced Concrete

As a kind of light bridge type, because of its shape agile, the structure beauty, its reasonable stress condition,rigid-frame arch bridge of reinforced concrete sets up more in the seven or eight 10-year generations in our country .It is a kind of important bridge type that is applicable to the soft soil foundation. First, this paper introduces the structure and stress characteristics of rigid-frame arch bridge of reinforced concrete ,says the basic calculation theories and the analysis methods of arch bridge, introduces procedures of the bridge structure.The point introduces an analysis of MIDAS/ Civil software of Korea.This paper with match the Changfeng road Bridge of He Fei just an arch bridge for actual background of engineering, makes use of limited dollar of MIDAS/ Civil analysis software, analyzes its internal forces affect to an arch bridge in the different of analytical mode about arch axis linetype,method of plane analysis and method of space analysis ,two design loads of new and old criterion. Above the analysis, we can know that the arch axis linetype of an arch bridge has no influence to the main control sections in its internal forces;adopting the method of space analysis and the method of plane analysis influences greatly to its internal forces;under new criterion, the internal forces of arch bridge are also greatly different of the old criterion's.This paper introduces the design important point and the important part of design of the rigid-frame arch bridge of reinforced concrete finally. The paper combines the engineering example to carry on the analysis and summary, haves the certain reference value.