Model Test On The Cable-beam Anchorage Structure With Tensile Anchor Plate Of Cable-stayed Bridges

The enormous cable force of Cable-stayed bridge fixs on cable-beam anchorage structure of the Cable-stayed bridge girder,the reliability of the cable-beam anchorage structure will have a direct bearing on the safety of the entire bridge,so, cable-beam anchorage structure is the key to the design of the site.First,The Chongqing Jingjin GuanyinyanYangtze Bridge applies the Cable-girder anchorage with tensile anchor plate.Taking the Static and fatigue test for the Zhanjiang BayBridge as an instance,the design of Static and fatigue test is studied in this thesis.Base on the similarity theory that the factor of stress and restriction is nearly as same as the actual bridge and the finite element analysis,not only the test model is designed but also the test method is affirmed.Secondary,On the static test data analysis,moreover,with the finite element method results,Shows that the tensile anchor plate mode structure has a reserve safety, But the local area there is a great stress.Finally,The analysis and evaluation of the fatigue test data indicate that the values of the main region is very close and shows the linear relation between strain and load,and the second,all the load and unload course,actual strain is symmetrical and that the crack is always not found in the structure of the test panel point.So the conclusion that it can not appear fatigue cracks during design life period with normal periodic maintenance is provided.For predicting the probable service life of the test connection joint of The Chongqing Jingjin Guanyinyan Yangtze Bridge,the fatigue model test worked under over load beyond design life period is more studied.According to the contrast between the test data and data that the finite element gains,it is validated that the test data which can act as the proof to the true stress situation is exact.Further,it is proved that the connection joint is reliable owing to some correlative knowledge and standards and the existing achievements.It is concluded that the fatigue intensity of the connection joint of The Chongqing Jingjin GuanyinyanYangtze Bridge approve to design requirement.