Stability Analysis Of Concrete-Filled Steel Tubular Tied Arch Bridge

Concrete-filled steel tubular tied arch bridge is composition with steel tubular filled by concrete. A new structure that evolved and developed in steel reinforced concrete structure,helix reinforcement steel reinforced concrete and steel tubular structure.With the rapid development of technology and theory.Concrete-filled steel tubular tied arch bridge in our country is developing very rapidly. While the rapid development there are a lot of security risks,in our history because of instability arising from a variety of accidents had occurred.Thus,stability analysis of the bridge has a certain theoretical and practical significance。This dissertation describes the history of arch bridge,including the stone arch bridge,arch steel arch bridge structure.Most importantly describes concrete-filled steel tubular tied arch bridge’s development,structure, characteristics and stability analysis of concrete-filled steel tubular tied arch bridge.This dissertation introduces the arch stability theory.The concept includes two kinds of stability’s solving method,elastic finite element analysis,geometric nonlinear finite element analysis,material nonlinear finite element analysis,constitutive relation of Concrete-filled steel tubular tied arch bridge and so on.Combine with engineering examples, Use Midas/Civil finite element analysis software to build the twin towers of the main bridge across models,And analysis models’ stability,analysis of the arch support’s form,lateral bracing stiffness,span ratio,wide span ratio,boom stiffness and the impact of non-conservative force from boom effects and other factors on arch linear elastic stability,Finally,Eigenvalue stability analysis,geometric nonlinear stability analysis.I hope this dissertation can provide reference for the design and construction work of similar projects.