LOCALIZATION ISSUES IN NONLINEAR FRAME ANALYSIS

Nonlinear finite element analyses of brittle structures show mesh dependent results due to strain concentrations in localized regions or bands. The problem has been studied mainly for solid finite elements and appropriate remedies have been suggested to eliminate or alleviate the problem, especially for concrete in tension regions. This paper reports on an ongoing study on strain localization issues in frame analysis. The topic is of primary importance for the use of pushover and nonlinear dynamic analyses in performance-based engineering of new and existing structures. The discussion focuses on the bending response of concrete and steel specimens followed by simple tension and compression tests of concrete specimens. The study relies on the use of a force-based beam element that yields stable results even under element softening.

Language

  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 418-421

Subject/Index Terms

Filing Info

  • Accession Number: 00778256
  • Record Type: Publication
  • ISBN: 0784404216
  • Files: TRIS
  • Created Date: Oct 31 1999 12:00AM