LARGE DEFORMATION CYCLIC TESTS ON STAINLESS STEEL REINFORCING BARS FOR REINFORCED-CONCRETE STRUCTURES IN SEISMIC REGIONS

Stainless steel reinforcing bars, proposed for use in reinforced-concrete (r/c) structures, are available with the same lengths and current diameters of conventional carbon steel bars. They present advantages as regards durability, antioxidability, and mechanical properties. These may make them economically competitive with conventional steel bars, and therefore suitable for use in bridge decks in severe environments. Recent earthquakes have further emphasized the need for metal reinforcements capable of resisting considerable and often repeated deformations. The problem is particularly acute in the case of continuous-beam viaducts, since severe strain comes to bear on the integral joints between the deck and the piers. A solution is the use of stainless steel bars because of their intrinsic stress-strain features. R/c seismic-resistant structures may benefit from stainless steel bars as reinforcement for their higher ductility and toughness. These mechanical properties are particularly suitable for critical regions of r/c continuous beams or frames, as the capability of energy dissipation as well as the ductile elongation are greater than for conventional carbon steel. In addition, the antioxidability property of reinforcing bars affects the durability of the structure and its serviceability. Comparative experimental static monotonic and cyclic large deformation uniaxial tests have been carried out until failure on stainless steel AISI 304L bars with different strain rates, in order to reproduce the actual behavior of steel for r/c structures. Cumulative plastic damage has also been analyzed. Initial results reveal a significant dependence of fatigue parameters on the strain rate, particularly for relatively small plastic strain ranges.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 368-375
  • Monograph Title: FOURTH INTERNATIONAL BRIDGE ENGINEERING CONFERENCE, SAN FRANCISCO, CALIFORNIA, AUGUST 28-30, 1995. CONFERENCE PROCEEDINGS, 2 VOLUMES
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00711705
  • Record Type: Publication
  • ISBN: 0309061091
  • Files: TRIS, TRB
  • Created Date: Sep 5 1995 12:00AM