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The macroscopic fatigue behavior was characterized in terms of stiffness reduction and fatigue cracks.
考察了疲劳过程中刚度下降和疲劳裂纹产生情况。
A simplified expression for calculating the critical stress is developed according to a stiffness reduction technique. The experimental and theoretical results show good agreement.
利用层压板刚度减少技术推导了含表面缺口复合材料层压板的临界应力表达式。
In calculating the seismic force of high-rise steel structures, the periods should be multiplied by a reduction factor (0.9) to account for the stiffness due to non-structural elements.
在计算高层钢结构地震剪力时， 周期应乘以0.9 折减系数以考虑非结构构件对刚度的影响。
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