| 考虑桩基柔度的多跨梁桥高墩计算长度系数分析 |
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| 引用本文： | 高小妮,贺拴海,齐宏学.考虑桩基柔度的多跨梁桥高墩计算长度系数分析[J].武汉理工大学学报,2011(7):88-93. |
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| 作者姓名： | 高小妮 贺拴海 齐宏学 |
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| 作者单位： | 长安大学公路学院;长安大学桥梁与隧道陕西省重点实验室;中交公路规划设计院有限公司; |
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| 基金项目： | 国家交通运输部西部建设项目(2011318812970) |
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| 摘 要： | 为研究桩基柔度对桥墩计算长度系数的影响,推导出了考虑桩基柔度的墩顶水平柔度计算公式,并将邻跨下部结构及支座抗推刚度集成为墩顶水平弹性支撑,利用轴压杆件的欧拉公式建立计算长度系数与临界荷载的关系,通过构件稳定性计算分析了影响计算长度系数的参数及其变化规律。结果表明,考虑桩基柔度的桥墩计算长度系数的计算结果较不考虑时的大,增幅至少在10%以上;桥墩较高时,桩基柔度对计算结果影响复杂。最后,建议在高墩设计中考虑桩基柔度的影响,以获得较准确的计算长度系数来保证结构安全。
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| 关 键 词： | 桩基柔度 计算长度系数 抗推刚度集成 欧拉公式 临界荷载 |
Effective Length Factor of High-pier Analysis Considering Pile Foundation Flexibility of Multi-span Girder Bridge |
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| GAO Xiao-ni,HE Shuan-hai,QI Hong-xue.Effective Length Factor of High-pier Analysis Considering Pile Foundation Flexibility of Multi-span Girder Bridge[J].Journal of Wuhan University of Technology,2011(7):88-93. |
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| Authors: | GAO Xiao-ni HE Shuan-hai QI Hong-xue |
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| Affiliation: | GAO Xiao-ni1,HE Shuan-hai2,QI Hong-xue3(1.School of Highway,Chang'an University,Xi'an 710064,China,2.Key Laboratory for Bridge and Tunnel of Shanxi Province,3.CCCC Highway Consultants Co,Ltd,Beijing 100088,China) |
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| Abstract: | In order to investigate the effect of effective length factor of piers pile when considering the pile foundation flexibility,calculation formula of pier-top's horizontal flexibility is derived,besides,the pier-top's horizontal elastic support is integrated by anti-push rigidity of adjacent span's substructure and support.The relationship between effective length factor and critical loads is established by means of Euler's formula of axial compressive bar.According to component stability calculation,the infl... |
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| Keywords: | pile foundation flexibility effective length factor anti-push rigidity integration Euler's formula critical loads |
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