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A Distinguish Model for Initial and Additional Micro-Damages on Frozen Soil

LIU Zeng\|li~ 1, 2,\ LI Hong\|sheng~ 1, 2,\ ZHU Yuan\|lin~ 2,\ PU Yi\|bin~ 2,\ LI Hong\|yan~ 3 (Department of Engineering Mechanics, Dalian University of Technology, Dalian Liaoning 116023, China; 2.State Key Laborator of Frozen Soil Engineering,  
Using an additional damage concept, a relationship has been developed between frozen soil density and \%CT\% number of computerized topography (CT), regardless of the initial degree of saturation, so that a calculation model between \%CT\% number and inner additional damage is put forward. Thus, the relationship of \%CT\% number and gaps, which appear along loading process, can be ascertained. Calculation methods for ascertaining initial damage in specimens are suggestedas follows. Firstly, to prepare a perfect sample without any flaw, and then to detect the \%CT\% number of its initial state as \%H 0\% Secondly, to calculate \%CT\% number\% H\+\+1\-\-0\% of supposedly perfect sample but with difference density, and then to calculate the initial damage value D for samples with flaws. This step has been carried out for two series of frozen soil samples, and additional damage values under loading of one set of saturated samples can be determined.[FQ(1?46,ZX,BP,DY-W]
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