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Offshore Design Approaches and Model Tests for Sub-Failure Cyclic Loading of Foundations

机译:地基次破坏循环荷载的海上设计方法和模型试验

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Cyclic loading is an important aspect of offshore design because the environmental loading during extreme storm conditions generally dominates compared with the permanent loading. In most cases the focus for assessing the effect of cyclic loading is on quantifying the reduction in shear strength (and hence foundation capacity), although assessment of cumulative deformations under cyclic loading may also be critical for some designs. The chapter describes how a systematically planned programme of laboratory tests may be used to construct failure envelopes, or in a more general sense contours of cumulative shear strain as a function of normalised shear stress levels and number of cycles.
机译:循环载荷是海上设计的重要方面,因为与永久载荷相比,极端风暴条件下的环境载荷通常占主导地位。在大多数情况下,评估循环荷载作用的重点是量化抗剪强度(以及地基承载力)的降低量,尽管评估循环荷载作用下的累积变形对于某些设计也可能至关重要。本章介绍了如何使用系统规划的实验室测试程序来构造破坏包络,或者在更一般的意义上构造累积剪切应变随标准化剪应力水平和循环次数而变化的轮廓。

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