Study On The Deviation Of The Arch Axis And Strengthening Method Of The Stone Arch Bridge

The stone arch bridges in our country are commonly short of carrying capacity .A lot of stone arch bridges have been damaged over the days. in these cases, the deformations of arch axis is a common situation. The deformations of arch axis directly influence the distribution of the internal forces. The task that how to analyze the influence of arch axis deformations on the internal force of main arch ring and improve bridge's carrying capacity by maintenance and strengthening is so pressing. It can satisfy the economic development much better. Such problems as following are studied in this paper.The common damage of stone arch bridges is systemically analyzed. Some shapes of arch axis deflection are summarized. The reasons of these types of arch axis deviation are discussed. The analysis is based on the previous obtained information and uses finite element analysis program for plan pole system to calculate.The common strengthening methods are summarized. Both superstructure strengthening methods and construction technology are concluded based on the analysis of strengthening principle. Different strengthening method has different range of applicability. It depends on the damage of the bridge. The structure, the conditions of itself and the functional request of the bridge after strengthening.The strengthening methods of gongxiannanguan river Bridge are introduced.Through the assessment and the appropriate strengthening, the bridge's carrying capacity and traffic capacity can be improved. It can service the society much better because of the very significance for the highway traffic development in our country.