通过实验给出了桥墩的边界应力及内部应力，并绘出了相应的主应力迹线。
Based on the experimental results, the boundary stress and inside stress of the bridge pier are given and the relevant trace of the principal stress is drawn.
当一个主应力迹线通过一个各向同性点时，该符号会发生一个表面上的或虚假的改变。
An apparent or pseudo change in the sign occurs when a stress trajectory passes through an isotropic point.
在土木建筑工程中主应力迹线是布筋方向的依据，但是在工程中通常都是徒手或用曲线板近似绘制主应力迹线。
In civil engineering, the disposing of reinforcing steel bars is often based on the analysis of the principal stress traces.
在土木建筑工程中主应力迹线是布筋方向的依据，但是在工程中通常都是徒手或用曲线板近似绘制主应力迹线。
In civil engineering, the disposing of reinforcing steel bars is often based on the analysis of the principal stress traces.
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