Structural Analysis And Construction Monitoring Of CFST Arch Bridges Constructed By Slanting Pull And Buckle Technique

On the base of generalization and analysis of existing theory and experimental results about concrete-filled steel tubular (CFST) arch bridges and combination of CFST arch bridges' constitutional details and mechanical characteristics, computation theory and construction and monitoring technique of this type of bridges is taken into study and then the technique system of structural analysis and construction monitoring of CFST arch bridges by slanting pull and buckle technique is present.Based on the basic computation theory of CFST arch bridges and according to the comparison and analysis of current different regulations on design and construction of CFST arch bridges, basic computation formulations about strength of arch ribs and buckling factor and deformation modulus of CFST arch bridges are recommended.In this dissertation, regarding HaiKou Bridge on the KunMing-HaiKou Highway as a study project, the structural system of CFST arch bridges which arch ribs are constructed through slanting pull and buckle technique is theoretical analysis and some construction factor such as stay pulling force and blanking length are confirmed. After the whole bridge of each construction stage are analyzed by finite element method, stress and strain of main arch ribs. At last the stabilization of general and local bridge structure are checked. All above analysis are the theoretic foundation of construction safety.According to the characteristics of CFST arch bridges by slanting pull and buckle technique, the aim and content and technique of construction monitoring are present and technical secures are provided to protect the implementation of design aim in this dissertation.