Fundamental study of back analysis based on equivalent inclusion method

基于等效包含法的反分析基础研究

• 批准号: 09650530
• 负责人: YAMAGUCHI Eiki
• 金额: $ 2.37万
• 依托单位: KYUSHU INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650530/
• 关键词: Back Analysis; Equivalent Inclusion Method; Nonlinear Behavior; Probability; Mechanism; 岩盤; 弾塑性挙動; 情報化施工

The application of the equivalent inclusion method to the elastic-plastic structural analysis is explored. The formulations for the analysis of plane frames and continua are presented. In practice, plastic deformation is very often contained. The proposed numerical procedure has an advantage in those cases : it requires much less computational time than the conventional method. The equivalent inclusion method is also applied to the reanalysis. The computational time is shown to be saved considerably.The equivalent inclusion method is utilized in the back analysis of rock mass. The nonlinear problem can then be treated as a linear problem, and at the same time the number of unknowns can be reduced. Furthermore, the implementation of deformation (fracture) mechanism in back analysis is tried, and its effectiveness is verified by numerical examples. The usage of statistical data as priori information in back analysis is also studied. The importance of such information is confirmed by solving numerical examples.The numerical procedures for the analysis of piles modeled by the subgrade-reaction method is proposed. In particular, the evaluation of the coefficient of subgrade reaction is aimed at. Since the relationship between deflection and subgrade reaction is nonlinear, the finite element method with an iterative technique is taken. The effectiveness of the proposed approach is verified by numerical examples.

探讨了等效夹杂法在弹塑性结构分析中的应用。给出了平面刚架和连续体的分析公式。在实践中，塑性变形经常被包含。建议的数值方法在这些情况下具有优势：它需要比传统方法少得多的计算时间。等效夹杂法也被应用到重分析中。将等效夹杂法应用于岩体反分析中。然后，非线性问题可以被视为线性问题，同时可以减少未知数的数量。并尝试了变形（断裂）机制在反分析中的实现，通过数值算例验证了其有效性。研究了统计数据作为先验信息在反分析中的应用。通过数值算例证实了这些信息的重要性，提出了地基反力法模拟桩的数值分析方法。特别是，路基反力系数的评估是针对。由于弯沉与地基反力之间的关系是非线性的，因此采用有限元迭代法。数值算例验证了该方法的有效性。

项目成果

Yamaguchi, E., Hori, M., Kubo, Y and Abe, T.: "Elastic-Plastic Finite element analysis technique coupled with Equivalent inclusion method" L.Structural Eng./Earthquake Eng., JSCE. No.556/I-38. 85-94 (1997)

Yamaguchi, E.、Hori, M.、Kubo, Y 和 Abe, T.：“弹塑性有限元分析技术与等效包含法相结合”L.Structural Eng./Earthquake Eng.，JSCE。

Yamaguchi, E., Goto, Y., Kishi, N., Komuro, M.and Abe, K.: "On plasticty modes for analysis of bridge box pier with round corners under cycle loading" Thin-Walled Structures Research and Development, Elsevier. 803-808 (1998)

Yamaguchi, E.、Goto, Y.、Kishi, N.、Komoro, M.和 Abe, K.：“循环载荷下圆角桥箱墩分析的塑性模式”薄壁结构研究与开发，

山口栄輝: "有限要素解析における応力算定法に関する一研究" 構造工学論文集(土木学会). 44A. 21-28 (1998)

Eiki Yamaguchi：“有限元分析中的应力计算方法的研究”《结构工程学报》（日本土木工程师学会）44A（1998）。

山口栄輝: "弾性地盤反力法に基づく杭の有限要素解析に関する基礎的研究" 構造工学論文集(土木学会). vol.45A. 35-42 (1999)

Eiki Yamaguchi：“基于弹性地面反作用力法的桩有限元分析的基础研究”《结构工程学报》（日本土木工程师学会）第 45-42 卷（1999 年）。

山口栄輝: "有限要素解析における応力算定法に関する一研究" 構造工学論文集(土木学会). Vol.44A. 21-28 (1998)

Eiki Yamaguchi：“有限元分析中的应力计算方法的研究”《结构工程学报》（日本土木工程师学会）第 44A 卷（1998 年）。