triaxial prestress
... triaxial diagram 三轴图 triaxial prestress 三轴预应力 triaxial stress state 三轴应力状态 ...
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计算部分预应力混凝土梁开裂后截面应力时，需求解中和轴高度的三次方程，使计算显得比较复杂。
It is rather complicated to compute the neutral axis in partially pre-stressed concrete beams after cracking, since we have to solve a cubic equation.
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