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


IASS Symposium 2016

SESSION: Shell Structures

Ultimate strength of reinforced concrete shell of free form of a square plan supported by four corners

< Table of Contents for Shell Structures
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Shell Structures
  • Pages: 10
  • Title: Ultimate strength of reinforced concrete shell of free form of a square plan supported by four corners
  • Author(s): Ryo Hara, Shiro Kato, Shoji Nakazawa, Toshio Honma
  • Keywords: concrete shell, free form, ultimate strength, tensile strength of concrete, initial imperfection, imperfection sensitivity, anti-symmetric vertical seismic force, horizontal force
Abstract
Elastic-plastic buckling analysis is conducted for a reinforced concrete shell of free form of a square plan, which is stiffened by edge beams and supported by four corners. The intrinsic problem of the imperfection sensitivity of ultimate strength of the shell is studied in the case of not only gravity load but also earthquake loads. Moreover, the influences of cracking of concrete to the ultimate strength load is focused, in which cracking and tensile strength of concrete is considered in evaluating the ultimate strength, because the tensile strength plays an important role in ultimate strength and also because the deterioration of tensile strength is an important factor of aging concrete shells. The present study reveals how much concrete tensile strength and initial imperfections influence the ultimate strength of a free form shell by discussing in detail its failure mechanism.

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