Experimental investigation of prestressing in double-layer grids

Robert Levy, Ariel Hanaor, Nancy Rizzuto

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Practical designs of double-layer grids often fail to achieve full utilization of the structural efficiency inherent in this spatial framework. This inefficiency is due partly to the tendency to use a small number of different cross-sections, and partly to the sensitivity of compression members with `brittle type' buckling characteristics to imperfections. Prestressing can enhance structural efficiency through recruitment of unutilized member capacity. The procedure also enables improvement of ductility through some controlled strength trade-off. Results of the experimental work presented in this paper indicated increased strength of 40% compared with the non-prestressed configuration as well as enhanced ductility in the peak load region. Larger enhancements are feasible in large grids.

Original languageEnglish
Pages (from-to)21-26
Number of pages6
JournalInternational Journal of Space Structures
Volume9
Issue number1
DOIs
StatePublished - 1 Jan 1994
Externally publishedYes

ASJC Scopus subject areas

  • Conservation
  • Civil and Structural Engineering
  • Architecture
  • Building and Construction

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