主应力轴循环旋转下饱和软黏土的累积变形

姚兆明; 黄茂松; 曹杰

主应力轴循环旋转下饱和软黏土的累积变形 English Version

1.安徽理工大学土木建筑学院，安徽淮南 232001; 2. 同济大学地下建筑与工程系，上海 200092; 3. 中国民航机场建设集团公司机场工程科研基地，北京 100062

基金项目: 国家自然科学基金项目（50778132）；国家高技术研究发展计划（863计划）项目（2007AA11Z117）；国家杰出青年科学基金项目（50825803）；安徽高校省级自然科学研究项目（KJ2012A072）

详细信息

作者简介:
姚兆明 (1975 – ),男，安徽黄山人，博士，副教授，从事岩土工程教学与研究工作。

中图分类号: TU473
计量
- 文章访问数: 01272
- HTML全文浏览量: 0
- PDF下载量: 0894
出版历程
- 发布日期: 2012-06-19

Cumulative deformation of saturated soft clay subjected to cyclic rotation of principal stress axis

1. School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. R & D Center, China Airport Construction Group Corporation, Beijing 100062, China

摘要

摘要: 交通荷载下地基中土单元的主应力大小和方向将同时发生变化，现有的计算交通荷载引起的路基长期沉降实用模型未能反映交通荷载引起的土体单元主应力轴循环旋转现象。在推导常广义剪应力主应力轴循环旋转方程及验证空心圆柱剪切仪动力加载能力基础上，对上海第④层饱和软黏土进行一系列常广义剪应力主应力轴循环旋转加载试验及非等向固结下循环扭剪试验，分析了主应力轴旋转角、围压及静偏应力对循环塑性累积广义剪应变的影响。将常广义剪应力主应力轴循环旋转加载试验等效成不同不排水静偏应力和动应力循环旋转加载试验，从而进一步验证了文献 [12] 所提出的显式模型在模拟主应力循环旋转效应方面的可靠性。
- 原状饱和软黏土 /
- 主应力轴 /
- 循环旋转 /
- 交通荷载 /
- 显式模型
Abstract: The magnitude and direction of the principal stress of roadbed soil element will chang simultaneously under traffic loading. The traditional model based on tri-axial cyclic loading test data can not reflect the phenomenon of the principal stress rotation. After the axial stress-controlled equation and the circumferential shear stress-controlled equation are derived, a series of consolidated undrained cyclic shear tests are performed under the condition that the value of the general shear stress is constant and the principal stress angle is rotating. At the same time the cyclic torsional shear tests are performed under the condition of consolidation. The element affecting the plastic accumulative strain is analyzed. The test that the value of the general shear stress is constant and the angle of the principal stress is rotating is equivalent to those that the static deviatoric stress and dynamic stress are different. The explicit strain model in the 12^th reference is verified to calculate the accumulative strain caused by the cyclic loading of the principal stress axis.
- undisturbed saturated soft clay /
- principal stress axis /
- cyclic rotation /
- traffic loading /
- explicit model

HTML全文

参考文献(13)

[1]	GBABOUSSI J, MOMEN H. Plasticity model for cyclic behavior of sands[C]// Proceedings of the 3rd International Conference on Numerical Methods in Geomechanics. Aachen, 1979: 423 – 434.
[2]	MROZ Z, NORRIS V A, ZIEENKIEWICZ O C. An anisotropic hardening model for soils and its application to cyclic loading[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1978, 2 (3): 203 – 221.
[3]	LI T, MEISSNER H. Two-surface plasticity model for cyclic undrained behavior of clays[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2002, 128 (7): 613 – 626.
[4]	SUIKER A S J, de Borst R. A numerical model for the cyclic deterioration of railway tracks[J]. International Journal for Numerical Methods In Engineering, 2003, 57 (4): 441 – 470.
[5]	PONDER A R S. The analysis of cyclically loaded creeping structures for short cyclic times[J]. International Journal of Solids and Structures, 1976, 12 (2): 809 – 825.
[6]	MONISMITH C L, OGAWA N, FREEME C R. Permanent deformation characteristics of subgrade soils due to repeated loading[R]. Transportation Research Record. No. 537. Transportation Research Board. Washington, D C, 1975: 1 – 17.
[7]	LI D, SELIG E T. Cumulative plastic deformation for fine-grained subgrade soils[J]. Journal of Geotechnical Engineering, 1996, 122 (12): 1006 – 1013.
[8]	CHAI J C, MIURA N. Traffic-load induced permanent deformation of road on soft subsoil[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2002, 128 (11): 907 – 916.
[9]	PARR G B. Some aspects of the behavior of London clay under repeated loading[D]. Nottingham: University of Nottingham, 1972.
[10]	黄茂松 , 李进军 , 李兴照 . 饱和软黏土的不排水循环累积变形特性 [J]. 岩土工程学报 , 2006, 28 (7): 891 – 895. (HUANG Mao-song, LI Jin-jun, LI Xing-zhao. Cumulative deformation behavior of soft clay in cyclic undrained tests [J] . Chinese Journal of Geotechnical Engineering, 2006, 28 (7): 891 – 895. (in Chinese))
[11]	刘明 , 黄茂松 , 柳艳华 . 车振荷载引起的软土越江隧道长期沉降分析 [J]. 岩土工程学报 , 2009, 31 (11): 1703 – 1709. (LIU Ming, HUANG Mao-song, LIU Yan-hua. Analysis for long-term settlement of tunnel across river induced by vehicle operation[J]. Chinese Journal of Geotechnical Engineering, 2009, 31 (11): 1703 – 1709. (in Chinese))
[12]	黄茂松 , 姚兆明 . 循环荷载下饱和软黏土的累积变形显式模型 [J]. 岩土工程学报 , 2011, 33 (3): 325 – 331. ( HUANG Mao-song, YAO Zhao-ming. Explicit model for saturated clay behavior subjected to cyclic loading[J]. Chinese Journal of Geotechnical Engineering, 2011, 33 (3)): 325 – 331. (in Chinese))
[13]	沈扬 . 考虑主应力方向变化的原状软黏土试验研究 [D]. 杭州 : 浙江大学 , 2007. (SHEN Yang. Experimental study on effect of variation of principal stress orientation on undisturbed soft clay[D]. Hangzhou: Zhejiang University, 2007. (in Chinese))