发生腐蚀后，接箍形状不规则更容易发生应力突变，其使用寿命大大减小。
After corrosion, the pipe band with irregularities is more susceptible to sharp stress change, which will greatly reduce the service life.
笔者对接箍腐蚀的特点、原因和规律等问题开展了研究。结果表明，应力突变是发生腐蚀最关键的原因，特别是轴向应力占主导作用。
The corrosion characteristic, causes and laws of pipe connection bands are extensively studied, which shows that a sharp change of stress is the critical factor for corrosion, especially axial stress.
采用变形法计算混凝土应力时，假设应力在各个时段内以突变形式增加，并对这种假设带来的误差进行了分析。
When the deformation method was used for concrete stress calculation, it was assumed that the stress increased suddenly at each stage, and such an assumption led to certain errors.
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