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| Analysis of cable bending stiffness effect on test accuracy of anchor span tension for long-span suspension bridge |
| Received:January 19, 2014 Revised:May 19, 2014 |
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| DOI：10.7511/jslx201502006 |
| KeyWord:bridge engineering energy method natural frequency bending stiffness cable tension least square method |
| Author | Institution |
| 王达 |
长沙理工大学 土木与建筑学院, 长沙 ;桥梁工程安全控制省部共建教育部重点实验室, 长沙 |
| 杨琴 |
长沙理工大学 土木与建筑学院, 长沙 ;桥梁工程安全控制省部共建教育部重点实验室, 长沙 |
| 刘扬 |
长沙理工大学 土木与建筑学院, 长沙 ;桥梁工程安全控制省部共建教育部重点实验室, 长沙 |
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| Abstract: |
| In order to study the strands of main cables bending stiffness effect on the test accuracy of anchor span tension for long-span suspension bridge, relative expression between the natural frequency and the anchor span tension of the anchor span tension with considering the bending stiffness or not were deduced based on the energy method when the two ends are hinged, considering the boundary conditions of the anchor span tension is complex, the expression was also deduced based on the dynamic balance method when one end of the anchor span tension is hinged, another is elastic support.The accuracy and effectiveness had been verified with some classic examples, the conclusions indicate that the strands of main cables bending stiffness have a great effect on the test accuracy of anchor span tension.The study of the application of engineering shows that the strands of main cables bending stiffness influence on the test precision is mainly decided by the ratio of stress stiffness produced by tension to bending stiffness.The uncertainty of the anchor span boundary conditions also has considerable impacts on the precision of control, during the process of construction tension control.It can effectively solve the problem and can greatly improve the anchor span tension control precision with the proposed least square method. |
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