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


IASS Symposium 2016

SESSION: General: Towers & Temporary Structures; Preservation

Seismic retrofit design for a building of cylindrical shell structure of the Osaka Expo '70, the Tower of the Sun

< Table of Contents for General: Towers & Temporary Structures; Preservation
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: General: Towers & Temporary Structures; Preservation
  • Pages: 10
  • Title: Seismic retrofit design for a building of cylindrical shell structure of the Osaka Expo '70, the Tower of the Sun
  • Author(s): Hiroshi Kunitomo
  • Keywords: seismic retrofit, cylindrical shell, composite structure
Abstract
The building called the Tower of the Sun was completed in 1969 for Osaka Expo '70 for a temporary facility as exhibition inside and outside. Afterwards, the building was going to be demolished, however, a preservation movement made the building preserved in 1972 as structure whose interior was not open to public. To the contrary in the 2011 a plan of the refurbishment was raised to be open to public. This paper explains the analysis of structural safety mainly. The safety was confirmed by a governmental structural appraisal as a building higher than 60m called Koso Hyotei and the other building disaster prevention appraisal called Bosai Hyotei. The summary of the reinforcement is that steel braced frames of inscribed horizontal quadrangle at the upper part and additional 200mm thick reinforced concrete wall along the existing wall at the lower part were adopted.

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