The variable off-time regulates how often the transformer charges and delivers power to the load.

可变的间隙时间调节转换器多久充电和传递能量到负载。

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The theory of time-dependent ability is adopted to evaluate the residual service life of structure and a method is adopted to revise the variable load.

利用时变安全可靠度理论，对现有结构的剩余寿命进行评估，提出了对可变荷载取值进行修正的方法。

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The steel bar of midspan also come to the yield strength when the load increased. At this time, the caisson has been destroyed, because the partition wall has already been a variable body system.

两端加强角处钢筋首先达到屈服，形成塑性铰，荷载继续增大时，中间钢筋也达到屈服，此时沉箱隔墙已相当于一个可变体系，可认为结构已经破坏。

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