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[1]聂利芳,沈锐利,唐茂林,等.悬索桥主缆抗弯刚度引起的二次应力分析[J].建筑科学与工程学报,2010,27(03):59-64.
　NIE Li-fang,SHEN Rui-li,TANG Mao-lin,et al.Secondary Stress Analysis of Main Cable of Suspension Bridge Considering Bending Rigidity[J].Journal of Architecture and Civil Engineering,2010,27(03):59-64.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
27卷
期数:
2010年03期
页码:
59-64
栏目:
出版日期:
2010-09-20

文章信息/Info

Title:
Secondary Stress Analysis of Main Cable of Suspension Bridge Considering Bending Rigidity
作者:
聂利芳1,沈锐利1,唐茂林1,沈旺2
1. 西南交通大学 桥梁工程系,四川 成都 610031; 2. 浙江省舟山连岛工程建设指挥部,浙江 舟山 316000
Author(s):
NIE Li-fang1, SHEN Rui-li1, TANG Mao-lin1, SHEN Wang2
1. Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Zhejiang Provincial Construction Headquarters of Zhoushan Islands Link Project, Zhoushan 316000, Zhejiang, China
关键词:
悬索桥;  二次应力;  主缆;  抗弯刚度;  BNLAS
Keywords:
suspension bridge;  secondary stress;  main cable;  bending rigidity;  BNLAS
分类号:
U448.25
DOI:
-
文献标志码:
A
摘要:
为了研究悬索桥主缆考虑抗弯刚度引起的二次应力,以一座主跨为730 m的双塔单跨悬索桥为例,用索单元与空间梁单元组成的组合单元对主缆进行模拟,采用桥梁非线性分析软件BNLAS建立有限元模型,通过改变组合单元中梁单元的抗弯惯性矩,分析了抗弯刚度对主缆边跨和主跨二次应力的影响; 比较了加劲梁从跨中向桥塔方向吊装和从桥塔向跨中方向吊装2种不同吊装方案下的二次应力,研究吊装过程中二次应力的变化情况; 分析了恒载作用下悬索桥的二次应力随跨度的变化,并与有限元结果进行比较。结果表明:主缆抗弯惯性矩对二次应力影响很小; 吊装顺序对二次应力有较明显的影响; 恒载作用下跨度越小,二次应力越大。
Abstract:
In order to study the secondary stress of main cable of suspension bridge considering the bending rigidity, authors took a main-span of 730 m with twin-towers and single-span suspension bridge as example. The main cable was simulated with composite unit of cable unit and spatial beam unit. Then the finite element model was established by using bridge nonlinear analysis software BNLAS. The effects of bending rigidity on the main cable secondary stress of side-span and main-span were analyzed by way of changing the beam unit bending moment of inertia of composite unit. At the same time, the secondary stress was studied when the stiffening girder was lifted from bridge towers to the mid-span, as well as from the mid-span to bridge towers to research the secondary stress during the process of lifting. Finally, the secondary stresses with different levels of long-span suspension bridge under a variety of loads were analyzed theoretically, and compared with the finite element results. Results show that the effect of bending moment of main cable on secondary stress is very small, and the process of lifting has significant impact on secondary stress. The smaller the span is, the greater the secondary stress is under dead load state.

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备注/Memo

备注/Memo:
收稿日期:2010-07-05
基金项目:“十一五”国家科技支撑计划项目(2008BAG07B05)
作者简介:聂利芳(1986-),女,河南安阳人,工学硕士,E-mail:nilifa@163.com。
更新日期/Last Update: 2010-09-20