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


IASS Symposium 2016

SESSION: Bending Active and Flexible Structures

Non-prismatic bending and torsion beam elements for form-finding by dynamic relaxation

< Table of Contents for Bending Active and Flexible Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Bending Active and Flexible Structures
  • Pages: 10
  • Title: Non-prismatic bending and torsion beam elements for form-finding by dynamic relaxation
  • Author(s): Maryanne Wachter, Andrew Liew, Tom Van Mele, Philippe Block
  • Keywords: bending-active, dynamic relaxation, non-prismatic beams, form finding, torsion
Abstract
This paper evaluates the use of the 4-DoF beam-element formulation proposed by Du Peloux et al. [7], for modelling non-prismatic beam sections for form finding by dynamic relaxation. While non-standard sections have posed a problem for economic fabrication in the past, the rise of bespoke prefabrication opens up the possibility to create custom structural elements for bending-active structures. Tapered beam profiles can be formed from glass fibre-reinforced polymers (GFRP) by pultrusion, with consistent material properties. Given this construction potential, an extended numerical approach is presented that includes a linear weighting scheme at the element nodes and explores the required element discretization to achieve an accurate simulation of tapered members with different cross sections. The effects of bending alone and coupled bending with torsion for the non-prismatic beam elements are then compared to results achieved using standard beam elements in the finite element software ABAQUS.

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