| 钢管混凝土拱桥施工稳定性及缆风影响分析 |
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| 引用本文： | 李元兵,张启伟,李亚东.钢管混凝土拱桥施工稳定性及缆风影响分析[J].公路交通科技,2009,26(3). |
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| 作者姓名： | 李元兵 张启伟 李亚东 |
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| 作者单位： | 1. 同济大学,桥梁工程系,上海,200092
2. 西南交通大学土木工程学院,四川,成都,610000 |
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| 基金项目： | 国家自然科学基金重点项目 |
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| 摘 要： | 通过对钢管混凝土拱桥材料非线性分析方法的比较和总结，结合工程实例，采用纤维单元模型着重探讨了材料非线性对拱桥施工稳定性的影响。并对缆风在施工过程中对拱肋稳定性的有利效应、缆风设置等问题作了定量分析。结果表明，稳定安全系数不能拘泥于传统的定义和取值，应结合失稳形态并以实际荷载作用下结构的效应来计算；材料非线性对大跨度钢管混凝土拱桥稳定性的影响更为显著，有时达50％以上；缆风能显著提高拱肋稳定性，其合理布置方式应在拱腰和拱顶位置附近。缆风初张力对提高拱肋稳定性效果不明显。
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| 关 键 词： | 桥梁工程 钢管混凝土拱桥 有限元 纤维单元模型 缆风 非线性 |
Stability of Concrete-filled Steel Tube Arch Bridge during Construction and Guy-cable Effects |
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| LI Yuanbing,ZHANG Qiwei,LI Yadong.Stability of Concrete-filled Steel Tube Arch Bridge during Construction and Guy-cable Effects[J].Journal of Highway and Transportation Research and Development,2009,26(3). |
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| Authors: | LI Yuanbing ZHANG Qiwei LI Yadong |
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| Institution: | 1.School of Bridge Engineering;Tongji University;Shanghai 200092;China;2.School of Civil Engineering;Southwest Jiaotong University;Chengdu Sichuan 610031;China |
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| Abstract: | According to the comparison and summarization of different analytical methods for material nonlinearity of concrete-filled steel tube(CFST) arch bridge,the effect of material nonlinearity on the stability of CFST arch bridge during construction was investigated employing the fiber element model based on engineering projects,and the advantageous effect of guy-cable on the stability of arch ribs and the optimal way for guy-cable arrangement were studied quantitatively.Numerical results show that(1) the tradit... |
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| Keywords: | bridge engineering CFST arch bridge finite element fiber element model guy-cable nonlinearity |
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