导管架海洋平台是一种空间结构体系，在多维地震动作用下的反应计算较为复杂。
The jacket offshore platform is a spatial structure, and the computation of its response to the multiple seismic excitations is complicated.
比较全面地研究了在多维地震动作用下结构反应的组合问题，对各种组合方法进行了评价。
The combined problem of structural responses to multiple seismic ground motions is extensively analyzed and evaluated.
本文以拉压应力损伤因子为内变量，采用混凝土塑性损伤模型，分析了坝体在地震荷载作用下的刚度退化以及在多维应力状态下拉应力引起的损伤破坏。
In this paper, the stiffness degradation and damage failure in concrete dams subjected to strong ground motion are simulated by plastic-damage model based on damage index variable.
然而，由于地震作用的随机性与多维性，仅仅对钢筋混凝土箱型柱进行正向水平荷载作用下的抗震性能研究往往是不够的。
However, Because of the randomness and multidimensional of earthquake, the only study of the seismic performance of RC box columns under unilateral loading is often not enough.
然而，由于地震作用的随机性与多维性，仅仅对钢筋混凝土箱型柱进行正向水平荷载作用下的抗震性能研究往往是不够的。
However, Because of the randomness and multidimensional of earthquake, the only study of the seismic performance of RC box columns under unilateral loading is often not enough.
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