| 城轨高架桥上无缝线路伸缩附加力的一种算法 |
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| 引用本文： | 李伟强,唐进锋,李保友. 城轨高架桥上无缝线路伸缩附加力的一种算法[J]. 城市轨道交通研究, 2006, 9(5): 26-29 |
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| 作者姓名： | 李伟强 唐进锋 李保友 |
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| 作者单位： | 中南大学土木建筑学院,410075,长沙;中南大学土木建筑学院,410075,长沙;中南大学土木建筑学院,410075,长沙 |
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| 摘 要： | 以左端路基影响长度和桥跨上的梁轨位移相等点的位置为未知量,在每跨梁的支座处用钢轨位移连续协调条件构造非线性方程组,采用Levenberg-Marquardt算法(简为LM算法)进行求解。对某城市轻轨高架桥N跨32m混凝土简支梁分别用逐跨迭代积分法和LM算法进行计算,比较分析其结果。LM算法可以弥补传统算法中因误差积累而得不到有力学意义解的不足。在现场超多跨梁,特别是城轨高架桥的无缝线路伸缩附加力计算中,推荐采用LM算法。
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| 关 键 词： | 城市轨道交通 高架桥 无缝线路 伸缩附加力 |
| 收稿时间： | 2005-08-23 |
| 修稿时间： | 2005-08-23 |
A New Calculation of Additional Contractility in Viaduct CWR |
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| Li Weiqiang,Tang Jinfeng,Li Baoyou. A New Calculation of Additional Contractility in Viaduct CWR[J]. Urban Mass Transit, 2006, 9(5): 26-29 |
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| Authors: | Li Weiqiang Tang Jinfeng Li Baoyou |
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| Affiliation: | College of, Civil Architectural Eng., Central South Univ., 410075, Changsha,China |
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| Abstract: | According to the displacement condition o f rail at support, a group of non-linear equation is created and solved by the method of Levenberg-Marquardt. But the incidence of rail contractilisy on bridge and t he position where the displacement of rail and beam is equal are unknown.Compare d with the conventional method, LM can overcome the accumulative errors,s o in the calculating of the additional contractility of BCWR (bridge continous w elded rail),LM method can be used on multi-span bridges, especially on viaduct of light rail transit. |
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| Keywords: | urban mass transit viaduct continuous welded rails additional contractility |
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