土与结构界面位移特性静动力单剪试验研究

›› 2011, Vol. 32 ›› Issue (6): 1707-1712.

土与结构界面位移特性静动力单剪试验研究

袁运涛^{1, 2}，施建勇¹

1. 河海大学岩土力学与堤坝工程教育部重点实验室，南京 210098； 2. 河海大学水资源高效利用与工程安全国家工程研究中心，南京 210098

收稿日期:2010-02-03 出版日期:2011-06-10 发布日期:2011-06-21
作者简介:袁运涛男，1984年生，硕士，工程师，主要从事基础工程方面研究
基金资助:
国家科技支撑项目资助（No. 2006BAA01A24）

Study of displacement behavior of interface between soil and structure by static and dynamic simple shear tests

YUAN Yun-tao^{1, 2}, SHI Jian-yong¹

1. Key Laboratory of Ministry of Education for Geomechanimcs and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety, Hohai University, Nanjing 210098, China

Received:2010-02-03 Online:2011-06-10 Published:2011-06-21

摘要/Abstract

摘要： 土与结构接触面是工程中经常遇到的，剪切试验是研究界面特性的主要方法之一。单剪试验既可以研究界面的特性，又可以考虑土体受力变形的实际特征，土体变形和界面错动位移的关系是尚未被注意的问题。通过淤泥质粉质黏土的静、动力单剪试验和进行不同法向应力、不同剪切应力幅值的对比试验，得到界面位移与循环周数、土体应变的试验曲线。结果表明，静力单剪试验的初期剪应力迅速增大，其后增长速率逐渐减小，没有出现软化现象；在剪切初期，主要是土体发生剪切位移，达到一定位移量后，土体和钢板之间开始出现较为明显的滑移；在一定的土体应变范围内静力单剪界面错动位移和土体应变有近似线性关系；动力单剪的界面错动位移和土体应变有很好的线性关系；静动力试验界面位移与土体应变关系线的斜率总体上静力试验结果高于动力试验值，线性关系的斜率变化范围不大

关键词: 界面, 单剪试验, 静动力, 界面位移, 线性

Abstract: The interface of soil and structure is often found in projects. Shear test is one of the main methods to study interface behavior. The simple shear test considering the stress and strain of soil can be used to discover the characteristics of interface. The relation between strain of soil and displacement of interface is not concerned. By comparison of static and dynamic simple shear tests of mucky silty clay under different normal stresses and different amplitudes of shear stress, relation curves of displacement of interface and cycle number of shear load versus strain of soil are presented. It is obtained by analysis of test curve that the shear stress is increased rapidly at beginning of static shear test; the rate of stress increase is slower in test; softening not occurred. When shear stress is smaller the shear displacement is mainly in soil sample; after some displacement is reached the interface slide of soil sample and steel plate is obvious. There is similarly linear of displacement of interface and strain of soil in some extent of strain in static tests; there is good linearity of interface and strain of soil in dynamic tests; the gradient of the relation line of displacement of interface and strain of soil in static test is steeper than in dynamic test; and there is narrow range of gradient of linear relation of displacement of interface and strain of soil.

Key words: interface, simple shear test, static and dynamic, displacement of interface, linearity

中图分类号:

TU 443

袁运涛，施建勇. 土与结构界面位移特性静动力单剪试验研究[J]. , 2011, 32(6): 1707-1712.

YUAN Yun-tao , SHI Jian-yong. Study of displacement behavior of interface between soil and structure by static and dynamic simple shear tests[J]. , 2011, 32(6): 1707-1712.

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