文章摘要
李志军,周庆,汪恩良,贾青.加载方式对冰单轴压缩强度影响的试验研究[J].水利学报,2013,44(9):
加载方式对冰单轴压缩强度影响的试验研究
Experimental study on the loading mode effects on the ice uniaxial compressive strength
  
DOI:
中文关键词:   压缩强度  破坏形式  各向异性  位移控制
英文关键词: ice  compressive strength  failure modes  anisotropy  displacement control
基金项目:
作者单位
李志军 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1160242. 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室甘肃兰州730000 
周庆 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 
汪恩良 黑龙江省水利科学研究院黑龙江哈尔滨150080 
贾青 黑龙江大学水利电力学院黑龙江哈尔滨150080 
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中文摘要:
      针对冰的单轴压缩强度行为同加载方向、加载位移速度和试样相对尺寸有关,在-10C°冰样温度条件下,对不同尺寸的5种试样、平行冰面和垂直冰面的2种加载方向和位移速度在0.0072~387mm/min范围内,进行了25种组合的385次单轴压缩强度试验,获得375个试样的有效试验数据。结果发现,每组试样随加载位移速度的增加,其冰样的极限破坏应力(强度)也增加,达到一定值后,随加载位移速度的增加而减小;对应的冰样破坏形式也由韧性剪切破裂过渡到脆性破碎;垂直冰面方向柱状晶体的冰样强度约是平行冰面方向加载强度的1.87~2.40倍,表现出各向异性;试样相对尺寸小时其强度相对较大。
英文摘要:
      Considering the ice uniaxial compressive behaviors with loading directions, loading displacement speeds and specimen sizes, 385 tests in 25 groups were conducted with five different specimen sizes, two different loading directions parallel or perpendicular to the original ice surface, and the loading displacement speeds ranging between 0.0072~387 mm/min under the ice specimen temperature of -10°C. A total of 375 tests were successful in the 385 specimen tests. The experimental results show that (a) the ice ultimate stress (strength) increases firstly, reaches a top value, and then decreases with the loading displacement speed increasing;(b) the corresponding ice specimen failure modes change from ductile break to brittle break with the strain rate increasing;(c) the peak strength perpendicular to ice surface is 1.87~2.40 times of the strength parallel to ice surface in the columnar crystal ice,which it is a typical anisotropy material characteristics;and (d) the peak strength is higher in the cases of relative smaller specimens.
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