Cable Wind-rain-induced Vibration Prevention And Control Measures Of Research

With the rapid development of national economy,our country in the construction of Bridges and other infrastructure has also got rapid development.In bridge construction,as the r&d of new material in recent years,a new breakthrough of the theory of the application of new technology,the bridge structure is moving toward lightweight,thin and soft,and the direction of larger span.The lasso,as a kind of high strength,lightweight material,has wide application in civil engineering structures such as cable-stayed bridge and suspension bridge.But at the same time,also has its own lasso light,soft and low damping characteristics,make it easy to under the external excitation,especially in the wind and rain,under the stimulus of significant vibration.So to design a reasonable and effective damping devices to reduce cable-stayed bridge and cable vibration has become a important research topic.This article first embarks from the wind and rain induced vibration mechanism of the vibration,establishes mechanical model of wind vibration space,compute waterline in different wind speed,the coulomb damping force equilibrium position under the factors such as,the relationship between vibration amplitude,vibration frequency,the research of these factors influence on the vibration characteristics of lasso,draw relevant conclusions about vibration to the vibration mechanism with wind and rain.Then with the help of relevant data of fengjie Yangtze river bridge,using finite element software Ansys to establish finite element model of cable-stayed bridge and cable,bridge and cable-stayed bridge and cable for dynamic characteristics analysis.Finally rain vibration problem in view of the fengjie Yangtze river bridge and cable,designed a high damping rubber ring as important components of cable vibration reduction device,and the damping effect is evaluated.This article combine theoretical analysis and engineering example,and amparing the finite element calculation results with the measured results or analytical results,thatverify the correctness of the relevant research methods.The results not only have a certain reference value for the theoretical on inhibition of cable-stayed bridge of wind and rain induced vibration,but also have good guidance for the bridgeapplication of Fengjie Yangtze River Bridge.