Construction Monitoring And Parametric Analysis Of A Concrete Arch Bridge With CFST Rigid Skeleton Rib

With the improvement of the bridge construction technology and the maturity of the related calculation theory,the long-span rigid frame concrete-filled steel tube arch bridges constructed by self-erected method have been developed rapidly.This type of bridge need to adopt the built-in arch construction method.In the process of construction,the structure experiences many stages of system conversion andthe number of elements as well as the composition of the section change with the stages.As a complex and high statically indeterminate structure,its construction methods and stages affect and determine the ultimate stress and deformation of the structure.Inview of the difficulties in the design and construction of this type of bridge,a scientific and reasonable construction monitoring system is needed in the process of construction to consider the influence of various control parameters on the structural response,and strictly monitor the mechanical behavior of the structure to ensure the safety of the construction process.In this dissertation,the construction monitoring and parameter analysis were carried out for the construction of the bridge in the Liangshan Yi Autonomous Prefecture,Jinyang,the West camp of the Yi Ping one village,the West camp of the Pingyi Village(hereinafter referred to as the Jinyang bridge).The main contents are as follow:1.This dissertation introduced the development status of Long-Span Rigid Frame Concrete-Filled Steel Tube Arch Bridge,and the construction method of cable hoisting in detail from construction machinery,construction process and construction characteristics,and gives a detailed overview of the development of bridge construction monitoring.2.Based on the related data of construction organization design and construction process of Jinyang Bridge,the rigid frameconcrete-filled steel tube arch bridge with was designed to be monitored and implemented.According to the above data,the mechanical behavior of Jinyang Bridge was monitored for a long time.3.Taking Jinyang Bridge as the engineering background,the simulation model of Jinyang Bridge was established with the finite element software MIDAS/CIVIL.Based on theoretical calculation,combined with the measured data of construction monitoring,the construction was guided scientifically and efficiently.4.The influences of section parameters,environmental parameters,time-dependent parameters and load parameters on construction accuracy were analyzed.