Analysis Of Static And Dynamic Characteristics Of Single Cable Plane Suspension Bridge

The single main cable single cable surface suspension bridge has a unique shape and good landscape effect.It not only has the engineering attributes of grooming traffic,but also has the cultural attributes of the city's business cards.However,due to the special type of bridge,its static and dynamic performance problems are also more complicated.In this paper,taking a single main cable single cable surface suspension bridge as an example,the static and dynamic behaviors are modeled and analyzed,and the parameters are changed to analyze the influence of the parameter change on the static and dynamic characteristics of a single main cable single cable surface suspension bridge.It mainly conducts the following researches:(1)Taking a single main cable single cable surface suspension bridge in China as an example,the static characteristics of a single main cable single cable surface suspension bridge during the operational stage of the single main cable single cable surface suspension bridge are studied using the finite element software Midas-Civil 2015.The calculation includes: Get the empty cable type;Under the action of dead load,live load,temperature load and wind load,the internal force and deformation of main beam,main cable,suspender and bridge tower.(2)Change the structural parameters and analyze the influence of the change of parameters on the static performance of a single main cable single cable surface suspension bridge.The parameters changed include: span ratio,tower inclination,stiffening beam bending stiffness,main cable tensile stiffness,and stiffener girder load density.(3)Analyze the deflection of the stiffening beam under the most unfavorable loading conditions,the deflection of the left and right beam ends,and the reaction force of the support at the beam of the tower.In addition,the influences of the two changing methods of setting the continuous span of the side span and the splitting of the main girder to the torsional performance of the single main cable single cable surface suspension bridge are investigated.(4)Perform dynamic analysis of the operational status of the bridge,and obtain a description of the cycle,frequency,and mode shape of the first 20 modes of the bridge.Studied stiffening beam parameters(stiffness stiffness and constant load concentration of stiffened beams),boom parameters(number of inclined booms,boom stiffness),main cable parameters(vector span ratio,axial cable tensile stiffness)and stiffening beam layout(Effects of adding side span continuous sections and setting up separate stiffening girders)on the dynamic performance of a single main cable single cable surface suspension bridge.