| 斜拉桥拉索静力构形分析 |
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| 引用本文： | 任淑琰,顾明. 斜拉桥拉索静力构形分析[J]. 同济大学学报(自然科学版), 2005, 33(5): 595-599 |
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| 作者姓名： | 任淑琰 顾明 |
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| 作者单位： | 同济大学,土木工程防灾国家重点实验室,上海,200092 |
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| 基金项目： | 国家创新研究群体基金资助项目(50321003)，国家自然科学基金资助项目(50178049)，上海市科委科技攻关资助项目(036511002)，教育部高等学校骨干教师资助计划资助项目 |
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| 摘 要： | 从斜拉桥拉索微段的静力平衡方程出发，推导了不考虑拉索弹性和考虑弹性两种情况下拉索的悬链线构形以及索张力等静力参数的解析式，在此基础上作了一定的近似得到拉索的抛物线解．抛物线解无需忽略拉索重力弦向分力的影响就可以求得拉索的各静力参数，使用方便无需迭代求解．算例证明了用抛物线来代替悬链线精度较高，足以满足工程设计以及拉索静力分析中的计算要求。
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| 关 键 词： | 斜拉桥 拉索 悬链线 抛物线 |
| 文章编号： | 0253-374X(2005)05-0595-05 |
Static Analysis of Cables'''' Configuration in Cable-Stayed Bridges |
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| REN Shu-yan,GU Ming. Static Analysis of Cables'''' Configuration in Cable-Stayed Bridges[J]. Journal of Tongji University(Natural Science), 2005, 33(5): 595-599 |
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| Authors: | REN Shu-yan GU Ming |
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| Abstract: | Based on static balance equations of a differential cable segment,catenary solutions to inextensible and elastic cables under the action of self-weight were derived respectively.Then an approximate parabola configuration was obtained without neglecting the chord component force of cable self-weight.Using the parabola formula cable static parameters could be derived directly without iterative calculation.By taking two actual stay cables as examples,the correctness of all the solutions was confirmed.And the parabola formula is proved to be simple and precise and can be used conveniently in practical cable designs and other static analyses. |
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| Keywords: | cable-stayed bridge cable catenary parabola |
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