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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Form Finding & Optimization

Form finding and structural analysis of a freeform stone vault

< Table of Contents for Form Finding & Optimization
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Form Finding & Optimization
  • Pages: 10
  • Title: Form finding and structural analysis of a freeform stone vault
  • Author(s): Tom Van Mele, Anjali Mehrorta, Tomas Mendez Echenagucia, Ursula Frick, John Ochsendorf, Matthew DeJong, Philippe Block
  • Keywords: discrete structures, stone masonry, thrust network analysis, discrete element modelling
Abstract
This paper provides an overview of the form finding and analysis of a freeform, unreinforced, cut-stone, dry-set vault with 399 voussoirs. The vault covers an area of 75 m2 and spans more than 15 m in multiple directions. The thickness of the discrete, stone shell varies from 12 cm at the supports to 5 cm at the highest points. The paper describes the TNA-based funicular form-finding process starting from a geometrically defined target surface and a layout of the horizontal thrust in the system, and resulting in a three-dimensional network of forces in compression for the given loading and boundary conditions. Furthermore, the paper discusses the discretisation of the funicular geometry into voussoirs, and describes the conversion of the complex voussoir geometry into tetrahedralised compound blocks for analysis in 3DEC. Finally, the results of the structural analysis addressing both static and dynamic loading conditions are discussed.

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