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

IASS Symposium 2016

SESSION: Projects & Construction

Ribbon Chapel - Two interlinking spirals -

< Table of Contents for Projects & Construction
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Projects & Construction
  • Pages: 10
  • Title: Ribbon Chapel - Two interlinking spirals -
  • Author(s): Ikuhide Shibata, Hiroshi Nakamura
  • Keywords: spiral, tuned mass damper, base isolation system, friction pendulum system, herical curve, geometric engineering, chapel, staircase, observatory
The site is on the edge of a cliff overlooking the serene Seto Inland Sea in Japan. It's an iconic design that from a far looks like a sculpture. It's a small wedding chapel in a resort hotel. Two directionally opposing spiral staircases ascending and becoming one at the top, symbolizing two paths ending in a marriage. The structure can be regarded as a coil spring that twists and expands outward while moving up and down with pressure from above. Our solution to stabilize the movement was to have four connections where the inner and outer spirals meet. That creates a basic structural concept of hoops and a 3D bracing system which allows an overhang of the spiral. We installed the Base isolation system to reduce the seismic force and to increase durability. Therefore the structure is a seemingly totally independent, floating spiral staircase with un-intrusive vertical support posts.

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