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| Initial equilibrium state analysis of suspension bridge with spatial cables based on Steffens-Newton algorithm |
| Received:August 29, 2009 Revised:August 31, 2010 |
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| DOI：10.7511/jslx201105012 |
| KeyWord:cable-hanger coupling system Steffens-Newton method pattern search method initial equilibrium state |
| Author | Institution |
| 王晓明 |
长安大学 公路学院,西安 |
| 郝宪武 |
长安大学 公路学院,西安 |
| 段瑞芳 |
兰德公路工程咨询设计有限公司,上海 |
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| Abstract: |
| While calculating the initial equilibrium state of suspension bridge with spatial cables correctly,cable-hanger coupling system causes difficult convergence, and a rigorous approach is essential. In the paper, the equilibrium equation and the error adjustment equation of spatial cable-hanger system are established. The shape-change stiffness method and influence matrix method, which are widely used in plane cables, are proved inapplicable in spatial cables. Based on Steffens-Newton method with adjustable parameters, a rigorous analysis method for spatial cable-hanger coupling system is proposed.Program SN-ECFS is written. By the proposed method and pattern search method respectively, the calculation results of a numerical example are compared to indicate the precision and convergence efficiency of the proposed method. |
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