In this paper the methods of mode analysis and the random time dependent reliability, based on crossing rate, of random time dependent structures are suggested.
本文首先建立了随机时变结构的振型分解法，然后基于随机时变结构的超越率提出了相应的结构随机时变可靠性的计算方法。
The elastic characteristic value of time-dependent structures and the time of shore removal, both have effects on the ratios of maximum construction loads borne by floors.
施工时变结构体系的弹性特征值和拆模时间都影响楼层承担的最大施工荷载比率（荷载比率定义为结构承担荷载与楼板自重的比值）；
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