| 大跨度斜拉桥索塔锚固区钢-混凝土结构竖向受力机理的有限元法 |
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| 引用本文： | 杨允表,吕忠达. 大跨度斜拉桥索塔锚固区钢-混凝土结构竖向受力机理的有限元法[J]. 工程力学, 2008, 25(12) |
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| 作者姓名： | 杨允表 吕忠达 |
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| 作者单位： | 英国合乐中国有限公司;杭州湾大桥工程指挥部; |
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| 摘 要： | 在斜拉桥索塔锚固区的钢-混凝土组合结构中,钢锚箱是通过剪力钉把大部分的斜拉索竖向分力传递给混凝土塔柱的,但两者之间的竖向传力机理相当复杂。在引入了连续化的分析方法后,使分析问题得到了简化,推导了体现组合结构竖向受力特性的基本微分方程,利用有限元方法的基本理论得到单元刚度矩阵与荷载矩阵。该文还考虑了钢-混凝土索塔锚固区施工过程的收缩与徐变效应,更好地反映了结构的实际受力特性。为验证该方法的有效性,通过工程实例与复杂的三维有限元方法进行比较,其计算结果非常相近,但该方法比三维有限元方法简单而省时,能够为实际设计提供参考。
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| 关 键 词： | 斜拉桥 钢-混凝土组合结构 索塔锚固区 有限元方法 单元刚度矩阵 |
A FINITE ELEMENT METHOD FOR VERTICAL MECHANICS ANALYSIS OF STEEL-CONCRETE COMPOSITE STRUCTURE IN PYLON CABLE ANCHOR ZONE OF LONG SPAN CABLE-STAYED BRIDGE |
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| YANG Yun-biao,LU Zhong-da. A FINITE ELEMENT METHOD FOR VERTICAL MECHANICS ANALYSIS OF STEEL-CONCRETE COMPOSITE STRUCTURE IN PYLON CABLE ANCHOR ZONE OF LONG SPAN CABLE-STAYED BRIDGE[J]. Engineering Mechanics, 2008, 25(12) |
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| Authors: | YANG Yun-biao LU Zhong-da |
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| Affiliation: | 1. Halcrow China Ltd.;Shanghai 200021;China;2. Engineering Administrative Office of Hangzhou Bay Bridge;Cixi;Zhejiang 315300;China |
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| Abstract: | In steel-concrete composite structure of pylon cable anchor zone in cable-stayed bridge, most of vertical component of applied cable force transfers from steel anchor box to concrete walls through shear studs, but the mechanism of vertical force transfer is complicated and remains unaddressed. After introducing the analytical continuum method, this paper simplifies the analysis problems and obtains the fundamental differential equation which can reveal the vertical mechanics of the composite structure, and ... |
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| Keywords: | cable-stayed bridge steel-concrete composite structure pylon cable anchor zone finite element method element stiffness matrix |
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