Abstract

Many foundations, such as those of industrial equipment, offshore structures and wind turbines, have to operate under repeated loads. Shakedown analysis is a powerful method that yields a straightforward calculation of a load limit below which the foundation will be stable under repeated loading. In this article, using the upper bound shakedown theorem by means of displacement finite element method and nonlinear programming, the shakedown limit of strip footing on cohesive slopes under simultaneous horizontal and vertical repeated loads is investigated. The results are presented in the form of dimensionless charts. The effect of the cohesion and unit weight of the soil, the distance of the footing from the crest of the slope, and the angle of the slope, on the shakedown failure envelope, is studied.

摘要

许多基础，例如工业设备、海上结构和风力涡轮机的基础，必须在重复载荷下运行。抗震分析是一种强大的方法，它可以直接计算负载限制，低于该负载限制地基在重复负载下将保持稳定。本文利用位移有限元法和非线性规划的上界安定理，研究了水平和垂直同时重复荷载作用下粘性边坡条形基础的安定极限。结果以无量纲图表的形式呈现。研究了土体的黏聚力、单位重量、基脚距坡顶的距离、边坡角度对锚固破坏包络线的影响。