Publication

Performance of Energy Piles Considering Reinforced Concrete Non-Linearity

Lyesse Laloui, Cristiano Garbellini
2020
Conference Papers

Abstract

This study investigates the effect of reinforced concrete cracking on the performance of thermo-active piles subjected to traction force. A newly developed finite element code that is within the framework of the load-transfer approach is employed to simulate the response of a single pile subjected to thermomechanical loads. The results suggest that the performance of energy piles is highly affected by reinforced concrete non-linearity. Nevertheless, piles can accommodate thermally imposed strains if ductility capacity is provided. This outcome, in conjunction with the results of previous studies on the non-linear response of interfaces, may be considered for a more rational performance-based design approach of energy piles.

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https://infoscience.epfl.ch/entities/publication/2097a4d4-431e-4a1d-bd2d-96714b8d34b8

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Lyesse Laloui, Cristiano Garbellini
2020
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/2097a4d4-431e-4a1d-bd2d-96714b8d34b8

About this result

Related concepts (8)

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Prestressed concrete

Prestressed concrete is a form of concrete used in construction. It is substantially "prestressed" (compressed) during production, in a manner that strengthens it against tensile forces which will exist when in service. This compression is produced by the tensioning of high-strength "tendons" located within or adjacent to the concrete and is done to improve the performance of the concrete in service. Tendons may consist of single wires, multi-wire strands or threaded bars that are most commonly made from high-tensile steels, carbon fiber or aramid fiber.

Earthquake engineering

Earthquake engineering is an interdisciplinary branch of engineering that designs and analyzes structures, such as buildings and bridges, with earthquakes in mind. Its overall goal is to make such structures more resistant to earthquakes. An earthquake (or seismic) engineer aims to construct structures that will not be damaged in minor shaking and will avoid serious damage or collapse in a major earthquake. A properly engineered structure does not necessarily have to be extremely strong or expensive.

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