| 大跨度公铁斜拉桥的几何非线性效应 |
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| 引用本文： | 王頠,瞿伟廉.大跨度公铁斜拉桥的几何非线性效应[J].华侨大学学报(自然科学版),2009,30(2). |
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| 作者姓名： | 王頠 瞿伟廉 |
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| 作者单位： | 1. 武汉理工大学,土木工程与建筑学院
2. 武汉理工大学,道路桥梁与结构湖北省重点实验室,湖北,武汉,430070 |
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| 摘 要： | 考虑几何非线性效应,计算大跨度公铁斜拉桥承载能力和正常使用极限状态下的结构变形和内力. 采用分步迭代调索方法计算成桥索力,建立迭代修正Ernst公式,在索力计算和结构内力计算中考虑垂度效应, 研究拉索垂度效应、梁柱效应和大位移效应对斜拉桥极限状态时内力的影响. 研究结果表明,几何非线性对大跨度公铁斜拉桥的内力影响比较显著,线性计算结果与非线性计算结果相比偏不安全,在公铁斜拉桥结构设计中,必须计入几何非线性的影响. 各种非线性因素中斜拉索的垂度效应最为显著,其影响效应随外荷载的增大而变大.
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| 关 键 词： | 斜拉桥 极限状态 几何非线性 垂度效应 |
Effect of Geometrical Non-Linearity on Long Span Highway and Railway Cable-Stayed Bridges |
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| WANG Wei,QU Wei-lian.Effect of Geometrical Non-Linearity on Long Span Highway and Railway Cable-Stayed Bridges[J].Journal of Huaqiao University(Natural Science),2009,30(2). |
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| Authors: | WANG Wei QU Wei-lian |
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| Institution: | 1.College of Civil Engineering and Architecture;Wuhan University of Technology;2.Hubei Key Laboratory of Roadway Bridge and Structure Engineering;Wuhan 430070;China |
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| Abstract: | Internal forces and deformation of long span highway and railway cable-stayed bridge in the ultimate limit state and serviceability limit state are calculated.Considering geometrical nonlinearity behavior,the cable force under dead load is calculated by step iterative algorithm.The iterative modified Ernst formula is established and used in calculation of reasonable cable force and the internal force of structure.The cable sag effect,the beam-column effect and the large displacement effect are taken into ac... |
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| Keywords: | cable-stayed bridge limit state geometrical non-linearity cable sag effect |
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