Experimental study on the effect of porosity on the uniaxial compressive strength of sea ice in Bohai Sea

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• 作者：ZhiJun Li (1) lizhijun@dlut.edu.cn
  LiMin Zhang (1)
  Peng Lu (1)
  Matti Lepp盲ranta (2)
  GuangWei Li (1)
• 关键词：sea ice &#8211 ; ice problems &#8211 ; ice control &#8211 ; compressive strength &#8211 ; measurements &#8211 ; parameter estimation
• 刊名：SCIENCE CHINA Technological Sciences
• 出版时间：September 2011
• 出版年：2011
• 期刊代码：pc552_1674-7321
• 类别：et
• 卷：54
• 期：9
• 页码：2429-2436
• 数据来源：sp

摘要

For the abnormal ice condition in 2009–2010 winter, sea ice samples were collected in a tide ditch outside a port in the east coast of Liaodong Bay, and ice specimens were prepared. Experimental study was carried out with a temperature-control precision of 0.1掳C, and 117 columnar-grained ice specimens were loaded along the direction parallel to ice surface under different test temperatures (−4, −7, −10, −13, −16掳C) and strain rates ranging from 10−6 to 10−2 s−1 within which the ductile region, ductile-brittle transition and brittle region are contained. The uniaxial compressive strengths, density and salinity of the ice specimens were measured. The results support the curved-surface relationship between the uniaxial compressive strength and porosity within a wide range of strain rate. The curved-surface relationship gives a quantitative description about the variations of the mechanical behavior transition point with ice porosity, and supplies a uniform mathematical representation of uniaxial compressive strength under different failure modes. Besides, it is deduced that abnormal ice condition in 2009–2010 winter will not result in a change of the uniaxial compressive strength of sea ice in Bohai Sea.