The Practical And Simplified Calculation Method Of Exploration For The Main Beam's Stability In Plane Of The Self-Anchorde Suspension Bridge

Self-anchored suspension bridge is a particular kind of suspension bridge, it anchors the cable at the ends of its beam directly, in this way, the horizontal component of cable tension is resisted by beam. So under the action of external loads, the main beam of self-anchored suspension bridge will be in compression and in bending. As the external loads increasing, the main beam will be losing the press bending stability in plane, when the compression force of the main beam is increasing to the certain value. Now how to calculate the critical axial-force of the main beam is a very important problem. In the text, according to deriving process of the practical and simplified calculation method of the main beam's stability in plane of cable-stayed bridge, the author research for the practical and simplified calculation method of the main beam's stability in plane of self-anchored suspension bridge, using the formula which is used to calculate the critical axial-force of the elastic supported continuous beam. By way of example of Fushun Wanxin Bridge, analysis its stability, using the practical and simplified calculation method and finite element method, compare the results, we can know the practical and simplified calculation method is right or not. The main content covers the following aspects:1. The author put forward the practical and simplified calculation method of the main beam's stability in plane of self-anchored suspension bridge, according to deriving process of the practical and simplified calculation method of the main beam's stability in plane of cable-stayed bridge, using the formula which is used to calculate the critical axial-force of the elastic supported continuous beam; obtain the formula which is used to calculate the equivalent elastic supported rigidity of self-anchored suspension bridge's girder, according to the geometrical relationship of self-anchored suspension bridge's main cable.2. By way of example of Fushun Wanxin Bridge, using the general program ANSYS to calculate the axial-force of its girder, under some different loads, and make the combination of these axial-forces as its real axial-force; calculate the critical axial-force of the main beam's stability in plane of Fushun Wanxin Bridge, using the practical and simplified calculation method; calculate the main...