A Study On Design Parameter Of Haojiang Bridge In Shantou City

The through steel-box tie-bar arch-bridge is more and more popular in bridge engineering forthe advantages of great spanning capacity and beautiful appearance.Therefore,taking Haojiang bridge in Shantou cityas engineering background,the finite element model of Haojiang bridgeis established in this paper using the basic principle of finite element method;the static and dynamic performance of the bridge were analysed,and a reasonable design of the key parameters such as arch axis alignment was discussed,which would help provide the reference for design of the same type of bridge.The main contents are as follows:(1)According to the engineering geological and hydrological,meteorological and construction planning requirements of the bridge site,this paper discussthe applicability of each alternative bridge type scheme in the project.The finite element model was established,then the static and dynamic performances of the bridge were studied under constant load,live load and other critical loads.The results show that the design ofspan ratio and arch axis of the bridge is reasonable,and the static and dynamic performances of the structure can all meet the current specification requirements.(2)Comparative analysis of the stress state of the bridge withdifferent arch span ratio,arch axis coefficient,suspender force and the initial tension of the tie barwas conducted,and the influence of change of parameters on the reasonable bridge forming state of the arch bridgewas discussed.(3)Comparative analysis of the stability of arch bridge with different rise to span ratio,inclination of arch rib and the bracing of transverse brace was conducted.The influence of the change of parameters on the stability of the arch bridge was discussed.(4)The stress state of the arch foot was analyzed in detail,and the influence when the location of manhole in the diaphragm changed on the mechanical performance and deformation of the arch foot was discussed.