| 修正剑桥模型参数对计算结果的影响 |
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| 引用本文： | 张云.修正剑桥模型参数对计算结果的影响[J].岩土力学,2006,27(3):441-444. |
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| 作者姓名： | 张云 |
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| 作者单位： | 南京大学,地球科学系,南京,210093 |
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| 摘 要： | 修正剑桥模型是土工计算中广泛应用的弹塑性模型，模型参数的取值是计算分析的重要内容之一，运用实测位移资料采用反分析方法可以有效地确定模型参数。通过有限元计算分析了模型中各参数的变化引起的钻孔灌注桩码头前沿的水平位移的改变，计算结果表明，影响水平位移的主要参数是与弹性模量有关的无量纲参数，与弹性模量有关的指数，泊松比和原始各向等压加荷试验常数，其中尤以与弹性模量有关的无量纲参数对计算结果的影响最为显著，这为反分析参数的选择提供了依据。
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| 关 键 词： | 修正剑桥模型 参数分析 位移 |
| 文章编号： | 1000-7598-（2006）03-0441-04 |
| 收稿时间： | 2004-08-24 |
| 修稿时间： | 2005-01-04 |
Effects of parameters of modified Cambridge model on computed results |
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| ZHANG Yun.Effects of parameters of modified Cambridge model on computed results[J].Rock and Soil Mechanics,2006,27(3):441-444. |
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| Authors: | ZHANG Yun |
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| Institution: | Department of Earth Sciences, Nanjing University, Nanjing 210093, China |
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| Abstract: | Modified Cambridge model has been widely applied to geotechnical engineering; and it is important to decide the values of parameters in this model. One of the efficient ways to obtain these values is the back analysis based on the measured displacement. The finite element method is used to calculate the horizontal displacement at the front of the pier improved with drilled grouting piles. The changes of the displacement at that point with each parameter are analyzed. The results show that the four primary parameters are the dimensionless parameter related to elastic modulus, the exponent related to elastic modulus, Poisson’s ratio and the test constant of the virgin curve of isotropic loading, which have great effects on the displacement. This result may provide the basis for choosing the parameters for back analysis |
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| Keywords: | modified Cambridge model parameters analysis displacement |
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