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Three-dimensional finite element analysis of piled rafts with energy piles

机译：能量桩筏的三维有限元分析

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Over the last twenty years, the importance of environmentally friendly technologies in the field of construction has grown considerably. In this regard, energy piles are an innovative technology that combines the structural role of piles with that of a ground heat exchanger, through the inclusion of pipes carrying a heat exchanger fluid. Although it is common practice to cast the raft of a piled foundation directly on the ground, most of the available studies on energy piles have not been concerned with the implications that this entails. In this study, attempts have been made to fill this gap through a series of three-dimensional finite element simulations. This paper describes three dimensionless parameters, namely the raft to single isolated pile displacement ratio, the normalised differential displacement and the normalised thermally induced axial stress, which can be used to evaluate the overall performance of the foundation. The influence of the main mechanical parameters on the aforementioned dimensionless parameters is shown in graphical form and comparisons with conventional foundations are made.
机译：在过去的二十年中，环保技术在建筑领域的重要性已大大提高。在这方面，能量桩是一项创新技术，通过包含输送热交换器流体的管道，将桩的结构作用与地面热交换器的作用结合在一起。尽管通常的做法是直接将桩基础的木筏直接浇筑在地面上，但有关能量桩的大多数可用研究都没有考虑到这带来的影响。在这项研究中，已尝试通过一系列三维有限元模拟来填补这一空白。本文描述了三个无因次参数，即筏板与单个孤立桩的位移比，归一化的微分位移和归一化的热诱导轴向应力，这些参数可用于评估基础的整体性能。主要机械参数对上述无量纲参数的影响以图形形式显示，并与常规基础进行了比较。

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