[1]肖汝诚,卫璞,孙斌.大跨度部分地锚斜拉桥力学分析与参数研究[J].东南大学学报(自然科学版),2013,43(5):1097-1103.[doi:10.3969/j.issn.1001-0505.2013.05.032]
 Xiao Rucheng,Wei Pu,Sun Bin.Mechanical analysis and parametric study of long-span partially earth-anchored cable-stayed bridge[J].Journal of Southeast University (Natural Science Edition),2013,43(5):1097-1103.[doi:10.3969/j.issn.1001-0505.2013.05.032]
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大跨度部分地锚斜拉桥力学分析与参数研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第5期
页码:
1097-1103
栏目:
交通运输工程
出版日期:
2013-09-20

文章信息/Info

Title:
Mechanical analysis and parametric study of long-span partially earth-anchored cable-stayed bridge
作者:
肖汝诚卫璞孙斌
同济大学桥梁工程系, 上海200092
Author(s):
Xiao Rucheng Wei Pu Sun Bin
Department of Bridge, Tongji University, Shanghai 200092, China
关键词:
大跨度 部分地锚 斜拉桥 解析法 力学分析 参数研究
Keywords:
long-span partially earth-anchored cable-stayed bridge analytical methodology mechanical analysis parametric study
分类号:
U448
DOI:
10.3969/j.issn.1001-0505.2013.05.032
摘要:
为分析大跨度部分地锚斜拉桥受力特征,合理确定其设计参数,进行了解析方法研究和参数分析.基于斜拉索面膜化假定,推导了大跨度部分地锚斜拉桥的平衡微分方程,求得其近似解;推导了若干关键力学响应的计算公式,并与有限元计算成果进行了对比;通过解析计算公式,对边中跨比、塔梁高跨比、主梁刚度、索塔刚度和地锚锚索支承刚度等参数进行了研究,提出了大跨度部分地锚斜拉桥的若干设计建议.计算结果表明,所推导公式的误差均小于15%,可满足概念设计时的精度要求.参数分析表明,大跨度部分地锚斜拉桥边中跨比可取0.3左右,塔梁高跨比可按传统斜拉桥取值;主梁、索塔自身刚度对结构整体受力影响较小,而地锚索支承刚度影响较大.
Abstract:
Analytical research and parametric study are carried out to learn the mechanical behavior of long-span partially earth-anchored cable-stayed bridge and to determine the rational designing parameters. Equilibrium differential equations of long-span partially earth-anchored cable-stayed bridges are derived based on a continuous model and approximate solutions are obtained. A series of estimating formulae of the key structural responses are provided. Calculating outcomes are compared with that of a finite element model. Parametric study of the side-span ratio, pylon height, beam stiffness, pylon stiffness and supporting stiffness of earth-anchored cable is then performed based on the estimating formulae and several designing advices are proposed. Numerical results show that the estimating formulae have sound accuracy with errors less than 15%, which can meet the requirment in conceptual design stage. Parametric study shows that the optimal side-span ratio is around 0.3 and reasonable height of pylon is identical to conventional cable-stayed bridges. Rigidity of beam and pylon has minor impact on the mechanical behavior of the whole structure while the influence of the supporting stiffness of earth-anchored cable is significant.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 肖汝诚(1962—),男,教授,博士生导师,xiaorc@tongji.edu.cn.
基金项目: 国家重点基础研究发展计划(973计划)资助项目(2013CB036300)、国家自然科学基金青年科学基金资助项目(51008223).
引文格式: 肖汝诚,卫璞,孙斌.大跨度部分地锚斜拉桥力学分析与参数研究[J].东南大学学报:自然科学版,2013,43(5):1097-1103. [doi:10.3969/j.issn.1001-0505.2013.05.032]
更新日期/Last Update: 2013-09-20