Construction Stability Analysis Of Long-Span Steel Box Truss Arch Bridge

Based on the Daning Bridge Construction (main-span 400m steel truss arch bridge) Implementing stability analysis in the construction stages, the main contents this thesis are as follows:Inspecting a large number of references on the steel truss arch bridge , reviewing and suming up the history of the development of the system; generating the research results arch stability and development direction. analysis arch bridge section construction method and characteristics.For bridge construction stability , expositing stability theory and dicsusing finite element's principles and methods, focuing on the geometric and material non-linear finite element theory and corresponding method; Introducting calculation method for linear and nonlinear stability.under construction for the Daning Bridge, the construction stages of bucking stability analysis is carryed out . In Daning bridge construction stage, arch and column stability safety factor is calculated under dead load and transverse and longitudinal. For the lateral stiffness on the lower arch high column, vertical wind loading bridge to the role of bucking stability analysisthe. Cable-Stayed deduction for construction of pegging the major steel truss arch bridge construction facilities - deduction tower, containing a constant stability are analysised. Lower stability factor against the construction stage ultimate load analysis to determine the second-class stability constant load factor of safety.Referring to long-span steel arch bridge truss construction phase stability of the parameters of the study. Construction for the construction process parameters, such as the arch foot boundary conditions, the closure of the arch, the arch bridge column and the installation of the order parameter analysis. Determine impact Cable deduction linked to the method of construction of long-span steel arch bridge truss construction of the stability of the key factors. Construction for variable parameters, reference is given for the construction of the improvement measures.