扰动状态理论的指导思想是平均化，参考状态本身并不发生劣化过程。
DSC presents an average course, but the reference state responses are not displayed deteriorating course.
当荷载是循环往复应力时，引起的材料力学性能劣化过程称为疲劳损伤。
When the load is the stress cycle, the mechanical properties of materials caused by the deterioration process is known as fatigue damage.
调查表明，原设计混凝土标号过低，保护层过薄，桥面排水不当，加速了劣化过程。
The deterioration is accelerated because the strength grade of concrete is too low, depth of cover too thin, and drain off water unsuitable.
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