Testing concrete in torsion: instability analysis and experiments

Kolluru V. Subramaniam*, John S. Popovics, Surendra P Shah

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Torsion tests have been used to evaluate the shear response of concrete. The complete load-deformation response of unnotched concrete specimens subjected to torsion is difficult to obtain because of test instabilities. In this paper torsional tests with a closed-loop test system are performed on hollow concrete cylinders. The test instability is shown to be a result of snapback in the postpeak part of the torque-twist response of these specimens. The failure is a result of the propagation of a single major crack. A test signal that is a combination of torque and gauge rotation is introduced and is demonstrated to give improved control by eliminating the test instability. The response of concrete specimens subjected to both controlled and uncontrolled torsion tests, using specially designed test equipment, are presented and analyzed in terms of propagation of a single major crack.

Original languageEnglish (US)
Pages (from-to)1258-1268
Number of pages11
JournalJournal of Engineering Mechanics
Volume124
Issue number11
DOIs
StatePublished - Jan 1 1998

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering

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