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一个装置或结构的运行可能发生故障,由此就产生了风险率。风险率是事故似然(译注:“似然”系统计学专有名词,即可能性)与事故后果值的乘积。评定大坝风险率的目的有二个:一、进行方案比较,作益本分析。风险率相对减小即为效益;对于已运行的坝,方案比较可包括若干个改进建议,对于正处于设计阶段的坝,可对若干个体型和细部尺寸进行比较。二、对已运行坝进行排队,选择风险率高的坝作为进一步调查和补救的对象。此外,
A device or structure may malfunction in operation, thereby creating a risk rate. The risk ratio is the product of accident likelihood and the product of accident consequences. There are two purposes for assessing the risk rate of a dam: one is to compare the schemes and make the benefit analysis. The relative reduction of the risk rate is a benefit; for a dam that has already been run, the program comparison can include several suggestions for improvement, and for the dam under design, several individual sizes and details can be compared. Second, the dam has been run to line up, select the high risk dam as a further investigation and remedial targets. In addition,