| 用有限单元法分析超长单桩的荷载传递 |
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| 引用本文： | 曾友金,章为民.用有限单元法分析超长单桩的荷载传递[J].岩土力学,2002,23(6):803-806. |
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| 作者姓名： | 曾友金 章为民 |
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| 作者单位： | 南京水利科学研究院土工研究所,江苏,南京,210024 |
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| 摘 要： | 用描述桩侧摩阻力与桩-土相对位移关系的指数函数，推导出桩-土接触面本构模型，并设置了Goodman接触面单元来分析桩土相互作用。针对超长桩钢筋混凝土受应力大的特点，用混凝土的弹性非线性模型来分析受轴向荷载下钢筋混凝土的应力应变关系。编制的有限元程序能解决层状土及层状土导致沿桩身不同位置处桩-土相互作用不同特性，并针对工程实例桩变截面的特点，采用合理的计算手段使得按等截面桩计算分析结果与按实际变载面桩计算分析结果相同。用此程序对一工程实例进行了计算分析，计算结果与静载试验实测值较符合。
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| 关 键 词： | 超长桩 本构模型 荷载传递 有限元 |
| 文章编号： | 1000-7598-(2002)06-0803-04 |
| 收稿时间： | 2001-10-19 |
| 修稿时间： | 2001年10月19 |
Analysis of load-transfer of super-long single pile with finite element method |
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| ZENG You-jin,ZHANG Wei-min.Analysis of load-transfer of super-long single pile with finite element method[J].Rock and Soil Mechanics,2002,23(6):803-806. |
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| Authors: | ZENG You-jin ZHANG Wei-min |
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| Institution: | Nanjing Hydraulic Research Institute ，Nanjing 210024，China |
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| Abstract: | According to an exponential function describing the relation between friction around the pile and relative displacement of pile-soil，a constitutive model of interface is put forward and used as a means of studying pile-soil interaction with Goodman interface element。An elastically nonlinear constitutive model of concrete is employed to analyze stress-strain relationship of reinforced concrete under the axial load because of enough stress of reinforced concrete of the super-long pile。A compiled finite element program can solve layered soils and different characters of pile-soil interaction along the pile body caused by layered soils。According to the character of variational section of a case pile，it is considered as uniform section of pile with reasonable computing method assuring compute precision in the finite element program。Calculational results of the engineering case agree to statically loading testing results of the pile。 |
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| Keywords: | super-long pile constitutive model load transfer finite element method |
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