| 软土地基沉降的二维非线性粘弹性反演与预测 |
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| 引用本文： | 谭昌明,黄绍槟.软土地基沉降的二维非线性粘弹性反演与预测[J].岩土力学,2002,23(1):67-71. |
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| 作者姓名： | 谭昌明 黄绍槟 |
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| 作者单位： | 四川省交通厅公路规划勘察设计研究院,成都,四川,610041 |
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| 摘 要： | 基于Merchant粘弹性模型和简化双曲线模型，建立软土地基沉降的二维非线性粘弹性Biot固结有限元计算公式；根据最小二乘法建立目标函数，采用Simplex直接优化算法反演确定参数；为反演能获得在物理意义上合理且数学上唯一的参数，提出从简单模型到复杂模型的分步反演分析方法。实例分析表明，该方法是可行的。
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| 关 键 词： | 软土地基 沉降 二维非线性粘弹性 反演 预测 |
| 文章编号： | 1000-7598-(2002)01-0067-05 |
| 修稿时间： | 2001年3月5日 |
Back-analysis and prediction for settlement of two-dimensional nonlinear viscoelastic soft clay ground |
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| TAN Chang -ming,HUANG Shao-bin.Back-analysis and prediction for settlement of two-dimensional nonlinear viscoelastic soft clay ground[J].Rock and Soil Mechanics,2002,23(1):67-71. |
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| Authors: | TAN Chang -ming HUANG Shao-bin |
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| Abstract: | Two -dimensional formulas of nonlinear viscoelastic Biot's consolidation FEM based on Merchant's model and simplified hyperbolic model are presented to calculate settlement of saturated soft clay ground.Parameters in formulas may reasonably be determined by direct optimal method such as Simplex so that it minimizes the sum of squares of differences between calculated and measured quantities(objective function).The back-analysis step by step method is proposed to solve the well -posed problem of parameters' back -analysis.In fact,it is a procedure of model identification from simplified to complicated,and it is a new idea to study nonlinear back-analysis. |
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| Keywords: | soft clay ground settlement back-analysis prediction |
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