Research on test and revision of nonlinear fracture toughness of undisturbed frozen soils

LIU Xiao-zhou; WANG De-gang; LI Hong-sheng; YE Hui

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Research on test and revision of nonlinear fracture toughness of undisturbed frozen soils

更新时间：2026-06-25

- Research on test and revision of nonlinear fracture toughness of undisturbed frozen soils
- Vol. 28, Issue 8, (2007)
- 作者机构：
  
  1. 大连大学,大连,116622
  2. 大连理工大学工程力学系,大连,116023
  3. 大连普兰店市水利局,大连,116200
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411
- Online First：15 October 2013，
  
  Published：2007
- 稿件说明：
移动端阅览
LIU Xiao-zhou, WANG De-gang, LI Hong-sheng, et al. Research on test and revision of nonlinear fracture toughness of undisturbed frozen soils[J]. 2007, 28(8).
DOI：

LIU Xiao-zhou, WANG De-gang, LI Hong-sheng, et al. Research on test and revision of nonlinear fracture toughness of undisturbed frozen soils[J]. 2007, 28(8). DOI：

摘要

在以往原状冻土现场试验方法的基础上，针对原状冻土的非线性断裂力学特性进行了Ⅰ型和Ⅱ型断裂力学试验。在不同深度的冻胀量、冻深与时间变化规律下严格控制试样制作及试验时的温度，利用动态数据采集系统测出试样加力点处位移与力的关系曲线，并计算出相应的非线性参数。提出了利用非线性修正因子计算原状冻土断裂韧度的方法，并算出Ⅰ型、Ⅱ型直裂纹加卸载试样的非线性断裂韧度，将其与岩石断裂力学中的塑性修正因子方法的计算结果进行了对比，二者基本一致，说明该方法可以用来计算、修正原状冻土非线性断裂韧度，从而为冻土非线性理论的研究拓宽了思路。

Abstract

To study the nonlinear fracture mechanical characters of undisturbed frozen soils

the fracture TestⅠand TestⅡ based on the method of undisturbed frozen soils’ field test before have been done. According to the variational rules of heave quantities

the frozen depths and time at different depths

the temperatures were controlled strictly when the specimens were being made and tested. Then the relationship between the specimen displacement of force point and the force has been measured by using the dynamic data acquisition system; and the corresponding nonlinear parameters have been calculated. A new method

which can use nonlinear revision factor to predict fracture toughness of undisturbed frozen soils

has been proposed. Moreover

using present method

nonlinear fracture toughness of TestⅠ and Test Ⅱstraight crack loading and unloading specimens has been also computed. Numerical comparison shows that present results agree well with those computed from rock fracture mechanics. Therefore

this new method could be used to test and revise nonlinear fracture toughness of undisturbed frozen soils.

关键词

Keywords

references

Views

1029

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Research on test of modelⅠnonlinear fracture toughness of undisturbed frozen soils based on energy balance method

Field test and numerical simulation on thermo-mechanical response characteristics of a bridge energy row pile under heating-cooling cycles

Field test and numerical simulation of deformation characteristics of embankment on soft ground under different filling speeds

Comparative research on surrounding rock failure deformation and control mechanism in deep roadway driving along goaf based on discontinuous deformation analysis

Field test of piled beam-slab foundation

Related Author

LIU Xiao-zhou

WU Yin

WANG Zhong-chang

LI Hong-sheng

WU Jun-jie

WU Di

CHEN Rong

KONG Gang-qiang

Related Institution

Key Laboratory for Prediction & Control on Complicated Structure System of Education Department of Liaoning Province, Dalian University

State Key Laboratory of Frozen Soil Engineering Cold and Arid Regions Environmental & Engineering Research Institute, Chinese Academy of Sciences

School of Science, Qingdao University of Technology

College of Civil and Transportation Engineering, Hohai University

The Development Construction Co. Ltd. of China Construction Eighth Engineering Division

AI问答

⁰