It is stipulated that damage deformation occurs under loading or inverse loading conditions rather than under unloading condition.
采用损伤边界面，通过规定加荷或反向加荷产生损伤变形，卸荷不产生损伤变形来描述损伤塑性变形。
Generally, electric motor should be tested for an hour after starting in unloading condition, and a thorough check should be performed.
一般电动机起动后进行空载运行一小时，试运行中应作全面检查。
Based on experimental results, the stress of the rc beams under different unloading condition is analyzed, the formulation is deduced and it provides a reference for the reinforcement design.
结合试验结果，对粘钢加固混凝土梁在不同卸载条件下的受力机理进行解析分析，推导相应计算公式，为加固设计提供参。
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