This paper presents centrifuge tests undertaken to investigate the combined VH capacities of suction caisson in sand under multidirectional loadings following series of low magnitude horizontal cyclic loading. These loading paths are relevant to foundations of array of floating renewables such as wave energy converters or wind turbines. The centrifuge tests mainly provide information about the V–H yield envelopes in different loading directions and the H_x–H_y yield envelopes in the horizontal plane so that the effect of multidirectional loading can be analysed. The evolution of the yield envelope after cyclic loadings is first presented. Yield envelopes for load change angle β of 60°, 90°, 120° from the initial horizontal cyclic loading direction are then presented, and the mechanisms for increased capacity for β > 90° and reduced capacity for β < 90° are discussed.

中文翻译：

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密集沉沙中沉井多向载荷的离心观测。

本文介绍了一系列离心试验，以研究一系列低强度水平循环荷载作用下多向荷载作用下沉砂中沉箱的组合VH容量。这些加载路径与诸如波浪能转换器或风力涡轮机之类的浮动可再生能源阵列的基础有关。离心机测试主要提供有关不同加载方向上的V – H屈服包络和水平面上的H _x – H _y屈服包络的信息，以便可以分析多向加载的影响。首先介绍了循环加载后屈服包络线的演变。载荷变化角的屈服线β为60°，90°，从最初的水平循环加载方向120°然后被呈现，并且增加容量的机制β  > 90°和减小的容量为β 讨论°<90。