SEISMIC UPGRADE OF INTERIOR BEAM-COLUMN SUBASSEMBLAGES WITH HIGH-PERFORMANCE FIBER-REINFORCED CONCRETE JACKETS

The upgrade of the seismic performances of existing reinforced concrete gravity load-designed (GLD) structures is an important issue. This paper proposes a strengthening technique suitable for improving the performance of structures with poor reinforcement details when subjected to severe seismic actions. The technique proposed includes jacketing beam-column (B-C) subassemblages using high-performance fiber-reinforced concrete (HPFRC) for providing ductile B-C subassemblages. Ten 1/3-scale interior B-C subassemblages were subjected to reversed cyclic loading under no axial column load or under low levels of axial load. Some of these subassemblages were tested after strengthening using a 25 mm-thick jacket of HPFRC all around the joint-column regions. The results indicated that the seismic behavior of upgraded specimens was improved substantially. Within the range of the axial loads used in this study, the jackets containing hooked steel fibers (HSF) provided a better confinement and more ductility to the joint region compared with the jackets containing brass-coated steel fibers (BCS).

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
• Supplemental Notes:
  • For this issue of the ACI Structural Journal, the date is January/February 2005.
• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • Shannag, M J
  • Alhassan, M A
• Publication Date: 2005-1

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 131-138
• Serial:
  • ACI Structural Journal
  • Volume: 102
  • Issue Number: 1
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-3241
  • Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP

Subject/Index Terms

• TRT Terms: Axial loads; Ductility; Earthquake resistant design; Fiber reinforced concrete; Flexural strength; High performance concrete; Jacketing (Strengthening); Repeated loads; Steel fibers; Structural members
• Subject Areas: Bridges and other structures; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 00985154
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 31 2005 12:00AM