Research On Stability Of Cantilever Casting Construction Of Reinforced Concrete Arch Bridge

Cantilever casting construction method because of its site, good economic performance and other characteristics, has been widely used in the country, especially in the southwest of China. Existing cantilever casting construction of reinforced concrete arch bridge studies mostly aimed at the operation stage after the bridge analysis, engineering practice, cantilever casting construction technology is complex, for cantilever casting reinforced concrete arch bridge in the construction phase of the static and stability analysis, limiting the popularization and application of this construction method. Therefore, I start from the cantilever casting reinforced concrete arch bridge construction, and gradually establish a construction phase of the reinforced concrete arch bridge model, reinforced concrete arch bridge using cantilever casting construction stability and the parameters that affect the research, the main contents are as follows:(1) through the analysis of the construction method of reinforced concrete arch bridge and stability research results summarized to determine the applicable to the cantilever casting construction stability analysis method, namely the first stability analysis method, using the finite element analysis of construction phase stability.(2) establish the finite element model of the cantilever construction of arch bridge by Midas, on the static and stability of the whole construction process makes the analysis, the cantilever construction process of static and stability analysis results are obtained(3) has been established for the arch bridge cantilever casting construction of finite element model based on the first kind of stability problem of the finite element analysis method, by setting different parameters of concrete with different strength grade, fastener stiffness, and buckle tower height and other parameters influence on the stability of construction, arch bridge cantilever casting construction of stable safety coefficient under different parameters, so as to provide a reference for similar projects.