| 矮塔斜拉桥索梁活载比的特性研究 |
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| 引用本文： | 陈从春.矮塔斜拉桥索梁活载比的特性研究[J].公路交通科技,2009,26(1). |
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| 作者姓名： | 陈从春 |
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| 作者单位： | 上海应用技术学院,土木建筑与安全工程学院,上海,200235 |
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| 基金项目： | 上海应用技术学院引进人才启动基金 |
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| 摘 要： | 索梁活载比是针对新桥型——矮塔斜拉桥提出的一个概念。为了进一步明确其力学特征,研究了索梁活载比与支承条件、主梁惯距、拉索倾角和面积等设计参数的关系,并详细讨论了活载比对矮塔斜拉桥的静力特性影响,即索梁活载比与挠度、弯矩、应力变幅的关系。研究表明,索梁活载比包含了矮塔斜拉桥的塔、梁、索以及支承条件等的主要结构特征,能反映结构特性,可以将其看作矮塔斜拉桥的结构特征参数,有助于认识斜拉体系桥的力学行为,同时有助于概念设计阶段的设计。
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| 关 键 词： | 桥梁工程 矮塔斜拉桥 索梁活载比 支承条件 静力特征 |
Study on the Characteristics of Cable/Beam Live-load Ratio for Extradosed Cable-stayed Bridge |
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| CHEN Congchun.Study on the Characteristics of Cable/Beam Live-load Ratio for Extradosed Cable-stayed Bridge[J].Journal of Highway and Transportation Research and Development,2009,26(1). |
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| Authors: | CHEN Congchun |
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| Abstract: | The extradosed cable-stayed bridge is a new kind of bridge and for which the concept of cable/beam live-load ratio was put forward.In order to discover the mechanical characteristics of this type bridges,the relationship between the cable/beam live-load ratio and design parameters as girder inertia moment,cable angle and cable area were researched.And the interrelation between cable/beam live-load ratio and static properties(deflection,moment and stress amplitude) was discussed.It is proved that cable/beam live-load ratio,which can be looked as the characteristic parameter of extradosed cable-stayed bridge,is helpful to identify the mechanical behavior of the bridge,and to design on concept design stage. |
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| Keywords: | bridge engineering extradosed cable-stayed bridge cable/beam live-load ratio support condition static property |
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