Numerical Modelling of Fastnet Lighthouse Based on Experimental Dynamic Identification

Author(s): A. Pappas, D. D’Ayala, A. Antonini, J. Brownjohn and A. Raby
Paper category: Proceedings
Book title: Proceeding of the 71st RILEM Annual Week & ICACMS 2017
Editor(s): Manu Santhanam, Ravindra Gettu, Radhakrishna G. Pillai, Sunitha K. Nayar
ISBN:978-2-35158-195-7, 978-2-35158-190-2 (Set)
e-ISBN: 978-2-35158-191-9
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 617-628
Total Pages: 12
Language : English

Abstract: The Fastnet Lighthouse is an impressive seamark on a small islet in the Atlantic Ocean and the most southerly point of Ireland. It has been guiding mariners in their perilous profession since 1904. It is important for the safety of navigation in combination with its heritage value. Vibrations that were reported from here, led to the structural analysis of this iconic monument. Accessing the lighthouse by helicopter, experimental dynamic identification and material characterisation was performed. A detailed finite element model was built based on original archival drawings representing the built state. The commercial software Abaqus was used for the finite element modelling. The initial numerical properties of the model were assigned based on bibliographic research on the original materials. The calibration of the numerical model was based on the on-site material characterisation results and modal testing. A parametric analysis was also performed for identifying the influence of parameters such as the modulus of elasticity, weight of the lighting apparatus and type of foundations to the numerical modal analysis results. This work is part of the STORMLAMP project (Structural behaviour of rock mounted lighthouses at the mercy of impulsive waves) funded by the UK Engineering and Physical Sciences Research Council.

Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00