Modelling from the past: the leaning southwest tower of Caerphilly Castle 1539-2015

Prizeman, Oriel ORCID: https://orcid.org/0000-0003-4835-9824, Sarhosis, V., D'Alri, A. M., Whitman, C. J. and Muratore, G. 2017. Modelling from the past: the leaning southwest tower of Caerphilly Castle 1539-2015. ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-2/W , pp. 221-227. 10.5194/isprs-annals-IV-2-W2-221-2017

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Abstract

Caerphilly Castle (1268-70) is the first concentric castle in Britain and the second largest in the UK. The dramatic inclination of its ruinous south west tower has been noted since 1539. Comparing data from historical surveys and a terrestrial laser scan undertaken in 2015, this paper seeks to review evidence for the long-term stability of the tower. Digital documentation and archival research by architects is collated to provide data for structural analysis by engineers. A terrestrial laser scan was used to create a detailed three dimensional finite element model to enable structural analysis of the current shape of the tower made by tetrahedral elements. An automated strategy has been implemented for the transformation of the complex three dimensional point cloud into a three dimensional finite element model. Numerical analysis has been carried out aiming at understanding the main structural weaknesses of the tower in its present condition. Comparisons of four sets of data: 1539, 1830, 1870 and 2015 enabled us to determine change albeit between very different methods of measurement.

Item Type:	Article
Status:	Published
Schools:	Architecture
Publisher:	Copernicus Publications
ISSN:	2194-9050
Funders:	N/A
Date of First Compliant Deposit:	25 August 2017
Date of Acceptance:	24 August 2017
Last Modified:	04 May 2023 05:16
URI:	https://orca.cardiff.ac.uk/id/eprint/103978

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