| 加筋土计算中等效附加应力法的改进 | |
| 介玉新 ; 王乃东 ; 李广信 ; JIE Yu-xin ; WANG Nai-dong ; LI Guang-xin | |
| 2010-07-15 ; 2010-07-15 | |
| 会议名称 | 第九届全国岩土力学数值分析与解析方法讨论会论文集 ; 第九届全国岩土力学数值分析与解析方法讨论会 ; 中国湖北武汉 ; CNKI ; 中国力学会岩土力学专业委员会 |
| 关键词 | 加筋土 纤维加筋土 土钉墙 等效附加应力法 有限元 reinforced soil fiber reinforced soil soil-nailing wall equivalent additional stress method finite element method TU476.4 |
| 其他题名 | Modified equivalent additional stress method for numerical analysis of reinforced soil |
| 中文摘要 | 等效附加应力法的基本思路是把加筋土中筋的作用等效成外力加在土骨架上,取加筋土中的土体进行计算。这种方法能够适用于纤维加筋、分层加筋和土钉墙等不同情况,且能够克服一般复合材料方法中复合材料本构模型难以建立,和把筋土分开考虑的方法中接触面单元过多的弊病。但以前的等效附加应力法需要迭代计算,这给有限元编程带来困难,而且不利于已有程序的改编。对等效附加应力法进行改进,只要在原有土的弹性矩阵或弹塑性矩阵中加上一个附加矩阵就可以直接求解。这就使得不需要迭代就可以直接应用等效附加应力法进行加筋土计算,大大简化了编程难度,改进方法的提出有助于等效附加应力法的推广应用。; The basic principle of equivalent additional stress method is that only soil skeleton is concerned while the reinforcing effect is considered to be equivalent additional stress acting on the soil skeleton in the direction reinforcement being bedded.This method is fit for fiber reinforced soil,soil nailing wall and soil reinforced with layered reinforcements,etc.It can not only remove interface element for the method dealing with soil and reinforcement separately,but also avoid determining the composite constitutive equation of the reinforced soil.However,iteration is necessary for the conventional equivalent additional stress method,which makes it difficult in writing FEM program.In this paper,a modified method is put forward to deal with this problem.An additional matrix is calculated and added to the elastic matrix or elastoplastic matrix of soil,the method can be employed directly without iteration.The modified method is easy for writing FEM program and helpful for extending the application of equivalent additional stress method. |
| 会议录出版者 | 《岩土力学》编辑部（Journal Office of Rock and Soil Mechanics） |
| 语种 | 中文 ; 中文 |
| 内容类型 | 会议论文 |
| 源URL | [http://hdl.handle.net/123456789/69281]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 介玉新,王乃东,李广信,等. 加筋土计算中等效附加应力法的改进[C]. 见:第九届全国岩土力学数值分析与解析方法讨论会论文集, 第九届全国岩土力学数值分析与解析方法讨论会, 中国湖北武汉, CNKI, 中国力学会岩土力学专业委员会. |
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