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| Mechanical analysis and experimental research for rail cable launching technology about suspension bridge under loading condition |
| Received:August 11, 2016 Revised:February 07, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201704012 |
| KeyWord:suspension bridges stiffening girder construction rail cable launching technology mechanical analysis model test |
| Author | Institution |
| 潘权 |
长沙理工大学 土木与建筑学院, 长沙 |
| 颜东煌 |
长沙理工大学 土木与建筑学院, 长沙 |
| 许红胜 |
长沙理工大学 土木与建筑学院, 长沙 |
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| Abstract: |
| The key technical problems of the new technology of rail cable launching in the construction of long span suspension bridge are investigated by the theoretical research and laboratory model test.Based on the basic assumptions of flexible cable,the whole mechanical model of rail cable launching system under loaded condition is established,and equations for calculating the forces of the main cable,sling and rail cable etc.are derived.In the theoretical model,the rail cables for the segments with carrying-beam car are simulated by four straight line cable elements,while those for the other segments are simulated by one straight line cable element.Taking the Aizhai suspension bridge as engineering background,the whole reduced scale model of the rail cable launching system is designed and produced to simulate the moving process of the beam.And the system responses of the beam segment are tested on the sub-working conditions from entering-rail to installing.The theoretical and experimental results match well with each other,which verifies the accuracy and effectiveness of the presented theoretical method.And it can solve the systematic global mechanical analysis and local deformation for the rail cable launching technology under loaded condition in the process of the moving beam.This method also can simplify the calculation,and its accuracy and the results can be used to analyse and solve engineering problems,which is suitable for the studies on the rail cable launching technology under loaded condition. |
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