本文介绍了塔式起重机钢结构安全寿命评估中的应力幅及应力幅谱系数的计算方法和过程。
This paper describes the calculation method and process of stress amplitude and stress amplitude spectrum to evaluate the safety life time of steel structure for tower crane.
StEP还承担了一项工作，即评估这些目的地是否具备有效的设施，一旦这些垃圾寿命终结时能对其他进行安全的处理。
And StEP is also charged with assessing the facilities available at destination for safe disposal of such equipment once it reaches end of life.
仅用静力学方法对桥梁进行检测、评估，很难对新建桥梁和已有桥梁的安全性和使用寿命做出精确的评价。
It is very difficult to precisely evaluate the security and service life of the newly built bridge and the existing bridges using the static method only.
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