Strength demands of tall wind turbines subject to earthquakes and wind load

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Abstract

Wind and earthquake load have historically been conceived to act independently. However, if we reflect on the fact that major seismic events are usually followed by a number of aftershocks and that wind is constantly flowing at high intensities around wind farms, which induces additional demands of resistance to infrastructure, then the joint probability of middle-to strong earthquakes and low-to mild wind events becomes more relevant. In this paper a generalised approach is used to estimate the ratio between earthquake and wind forces and their effect on infrastructure. Following, a probabilistic analysis is carried out to show that under certain conditions the combination of these natural events can induce additional demands of strength and ductility to wind turbines which could lead to unforeseen damage.
Original languageEnglish
Title of host publicationX International Conference on Structural Dynamics, EURODYN 2017
EditorsFabrizio Vestroni, Vincenzo Gattulli, Francesco Romeo
PublisherElsevier
Pages3212-3217
Volume199
DOIs
Publication statusPublished - 12 Sept 2017
EventX International conference on structural dynamics - Sapienza University, Rome, Italy
Duration: 10 Sept 201713 Sept 2017

Conference

ConferenceX International conference on structural dynamics
Abbreviated titleEurodyn 2017
Country/TerritoryItaly
CityRome
Period10/09/1713/09/17

Bibliographical note

The 2015 Paris Climate Agreement derived in escalated targets across nations to reducing CO2 emissions within the following years. In such scenario, wind energy stands as a prominent renewable source that encourages the systematic development of taller wind turbine prototypes with enhanced output generation capacity. This trend is however constrained by uncertainties about the performance of such systems when exposed to stronger wind streams, as well as by technical difficulties to build, maintain, and operate, structures exceeding 200 m in height. The paper scrutinises the feasibility of implementing hyper-tall wind energy generators by assessing their dynamic response against multi-load conditions.

Keywords

  • hyper-tall wind turbines
  • earthquake and wind load
  • multi-hazard load scenarios

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