The Impact Of The Change Of Main Beam Deflection With Cable-stayed Bridge Cable Damage

As a key bearing member of the cable-stayed bridge,the cable-stayed cable plays an important role in the bearing capacity of the cable-stayed bridge.Therefore,the damage of the cable can directly affect the operation of the whole bridge.However,It is difficult to detect under the condition of external protection measures.Therefore,the detection of cable tension is more complicated and the accuracy is not guaranteed.Therefore,this paper will study the effect of cable-stayed damage on the deflection of the main beam,Analysis of the Effect of Cable Damage on Deflection of Main Girder.In this paper,the monthly model of cable-stayed bridge is established by finite element software.The specific contents of the study can be divided into parts: First,in the case of undisturbed cable,the beam of the overall temperature rise,cooling,analysis of the main beam deflection and cable force changes;Second,in the case of cable loss,Respectively,by the weight load and the car load,the main beam deflection and cable force changes;Third,the single cable in a variety of damaged cases,respectively,the calculation of vehicle load,temperature load and self-weight load,cable cable force and The variation of the cable tension and the deflection of the main girder are affected by the load,the temperature load and the self-weight load.The influence of the cable tension and the deflection of the main beam The influence of cable damage on the deflection of the main beam is discussed.It is found that the position of the anchorage point of the cable and the main beam changes under the action of temperature load and heavy load,and the anchor point corresponding to the damage cable will appear obviously under the action of the cable.The deflections at the anchors are not the same when the cables at different locations are damaged.When the damage of the cable is different,the deflection value of each anchor point is different.It can be seen that there is a correspondence between the deformation of the inner beam and the variation of the deflection of the main beam,The extent of damage to the cable and even the degree of damage to the cable.