The Influence Of The Arrangement Of Inclined Hangers On The Mechanical Properties Of CFST Arch Bridge

In recent decades,the CFST arch bridge has been widely used because of its advantages,such as strong spanning capacity,beautiful appearance,convenient construction and so on.However,the application of the inclined boom in the concrete filled steel tube arch bridge is very little.Compared with the straight boom,the inclined arch bridge can make the arch bridge have the advantages of small bending moment of the beam,small degree of winding,large stiffness and good economy.The arch bridge has been widely used abroad,but it has not been used in china.In this paper,a concrete filled steel tube arch bridge is taken as a background project to study the changes of internal forces and deflections,structural stability and dynamic characteristics of arch bridges under different hanger configurations.In this paper,the development status,and the arrangement of the arch bridge suspender of CFST arch bridge are introduced briefly.Then,the paper introduces the calculation theory of arch bridge,including the theory of stability and dynamics.Then combined with the engineering example,with finite element software to simulate the structure of Midas bridge,on the derrick arrangement in different forms,in the linear elastic range,influence of layout of steeve on structure stress.The study shows that the oblique hanger arrangement can redistribute the bending moment of the arch rib relative to the arrangement of the straight suspender.Because of the redistribution,the structure can be more uniform and the displacement will decrease obviously.Then,the analysis method of linear elastic stability,study the layout of hangers,hanger rigidity and suspender failure studies show that impact on the structural stability of the above several factors,the stiffness of structure is more obvious.At the same time,the influence of different suspender arrangements on the dynamic characteristics of structures is studied.The natural frequencies of the in-plane vibration of arch structures can be obviously improved by the oblique hanger arrangement,while the natural frequencies of the outside vibrations are less affected.