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°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°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. 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 ° 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 ° C) and strain rates ranging from 10-6 to 10-2 s-1 within which the ductile region, ductile-brittle transition and brittle regions 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 rates. The curved-surface relationship gives a quantitative description of the variations of the mechanical behavior transition point with ice porosity, and supplies a uniform mathematical representation of uniaxial comp ressive 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.