... principal tensile stress汁应力，主拉应力 major principal stress最大主应力，第一主应力 principal value本金值；基本价值；主值 ...
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major principal stress arch 大主应力拱
orientation of major principal stress 总主应力方向
Principal stress major 最大主应力
At the beginning of loading, the major principal stress centralize in a triangle area under the lap.
刚开始加载时，最大应力集中在搭接面以下的一个三角形区域内。
The direction of the major principal stress in a region remains the same from tens of meters to 4000 meters below surface.
一个地区的主压应力方向在地下几十米至4000米大体是一致的。
The direct earth pressure should be calculated by analysis of minor principal stress arch while the indirect earth pressure by analysis of major principal stress arch.
可用小主应力拱应力分析计算直接土压力，用大主应力拱应力分析计算间接土压力。
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