| 桩土相互作用对大跨连续刚构桥动力特性的影响 |
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| 引用本文： | 高传贤.桩土相互作用对大跨连续刚构桥动力特性的影响[J].山西交通科技,2014(2):49-52. |
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| 作者姓名： | 高传贤 |
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| 作者单位： | 山西省公路局长治分局,山西长治046000 |
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| 摘 要： | 以一座大跨连续刚构桥为例,采用大型有限元分析软件midas/civil建立了全桥离散有限元模型,分别比较了全桥在承台底固结、等效土弹簧和等效嵌固3种不同边界条件下的动力特性。计算结果表明:桩土相互作用对大跨连续刚构桥的振型顺序和振型状态影响不大,但对频率影响较大。忽略桩土相互作用会使计算频率偏大,桩土相互作用对第2阶振型频率影响最大。采用适当深度的等效嵌固桩径可以模拟桩土相互作用。进行全桥动力特性分析时,不建议采用承台底固结简化模拟,建议采用土弹簧法来模拟桩土相互作用,以获取更为精确的动力特性计算结果。
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| 关 键 词： | 桥梁工程 桩土 共同作用 有限元 等代土弹簧 等效嵌固 模型 |
The Study on the Influence of Pile-soil Interaction Effects on the Dynamic Characteristics of Long-span Continuous Rigid Frame Bridge |
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| GAO Chuan-xian.The Study on the Influence of Pile-soil Interaction Effects on the Dynamic Characteristics of Long-span Continuous Rigid Frame Bridge[J].Shanxi Science & Technology of Communications,2014(2):49-52. |
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| Authors: | GAO Chuan-xian |
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| Institution: | GAO Chuan-xian (Changzhi Branch of Shanxi Provincial Highway Bureau, Changzhi, Shanxi 046000, China) |
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| Abstract: | Combined with a long-span continuous rigid frame bridge as an example, this paper used largescale finite element analysis software MIDAS/CIVIL to establish the whole bridge discrete finite element model. It also respectively compared the dynamic characteristics of the whole bridge under the three kinds of different boundary conditions. |
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| Keywords: | bridge engineering pile-soil interaction finite element equivalent soil spring equivalent embedded model |
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