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。
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.
由于岩体在加载和卸载条件下应力路径的不同，仅采用加载条件下所建立的力学模型来研究隧道的开挖稳定性问题是不适合的。
Due to the difference in stress paths between the loading and unloading conditions, it is unsuitable to apply mechanical model under loading condition to stability of tunnel excavation.
进行了岩石在峰值荷载变形条件下的松弛试验及峰值荷载前的加卸载试验。
The stress relaxation experiments of rocks under the deformation at peak load and load-unload experiments before peak load are carried out.
在相同位移速率和相同载荷水平条件下，同一次循环时岩石变形曲线的加载段与卸载段的相应拟合参数值不同。
The imitational parameters are different for loading section and unloading section of the fine-sandstone deformation curve at the same circulate curve under the same deformation-rate and stress-level.
将导电涂膜应用于混凝土试块的抗压试验，结果发现导电涂膜在快速加、卸载条件下对混凝土微裂缝的出现及扩展相当敏感。
The conductive coat has been applied on concrete test blocks during the compression test, the data shows that the conductive coat is rather sensitive to formation and extension of tiny cracks.
将导电涂膜应用于混凝土试块的抗压试验，结果发现导电涂膜在快速加、卸载条件下对混凝土微裂缝的出现及扩展相当敏感。
The conductive coat has been applied on concrete test blocks during the compression test, the data shows that the conductive coat is rather sensitive to formation and extension of tiny cracks.
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