辽东湾S2冰侧限剪切强度的试验研究  

Experimental study of confined shear strength of S2 ice in Liaodong Gulf

作　　者：李志军[1] 孟广琳[2] 高树刚[2] 刘培林[2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]国家海洋环境监测中心,辽宁大连116023

出　　处：《海洋工程》2002年第1期20-23,共4页The Ocean Engineering

基　　金：国家自然科学基金资助项目 ( 4 9776 2 78);中国科学院寒区旱区环境工程研究所冻土工程国家重点实验室资助项目

摘　　要：利用试验方法系统地研究了辽东湾S2型海冰侧限剪切强度随剪切应变速率、加载方向、法向应力、温度和冰内孔隙率的变化规律。介绍了S2型海冰各向异性特点及剪切应变速率对剪切破坏方式的效应和韧脆破坏转变的条件。分析了不同加载方向海冰峰值剪切强度的差异 ,获得 - 6 2℃温度下S2冰内摩擦角和内聚力分别为 42°和 70 0kPa。The behavior of shear strength of S2 ice in Liaodong Gulf was studied by use of the experimental method.The shear properties with shear strain ratio,loaded directions,normal stress,ice temperature and ice porosity were tested.In this paper,the test set-up and ice samples are described,and the effect of shear strain ratio on shear failure form and the transfer of ductile-brittle failure are given.The differences among peak shear strengths in three directions are analyzed.Test results show the angle of internal friction is 42° and cohesion is 700 kPa in ice temperature -6.2℃.The experimental relations of peak shear strength with ice temperature and ice porosity are obtained by using statistical method.

关 键 词：海冰 剪切强度 法向应力 温度 孔隙率 加载方向 

分 类 号：P731.15[天文地球—海洋科学]