Influence of Concrete Material Ductility on Headed Anchor Pullout Performance

There has not been full resolution of anchor/concrete connection fracture failure problems associated with the inherent brittleness of concrete, despite the wide use of steel anchors in the construction industry. There is systematic investigation of material ductility's influence on anchor pullout performance in this paper by replacing normal concrete with engineered cementitious composites (ECCs), a relatively new ductile concrete material. ECC strain hardens to several percent tensile strain capacity, which is also known as tensile ductility, or a material's maximum sustainable tensile strain before fracture failure-induced load drop. That when compared with connections with regular concrete materials, anchor/ECC connections exhibit higher energy absorption, higher displacement capacity, higher ultimate strength, and more ductile failure mode, is shown in experimental results. In concrete materials, distributed inelastic damage made of microcracking over a volume of material near the anchor heads replaces the typically observed cone-shaped brittle fracture. Improved steel anchor connection load response results through ECC material use's significant effectiveness in load redistribution among anchors in a group is suggested through this significant enhancement of ductility.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/13846872
• Authors:
  • Qian, Shunzhi
  • Li, Victor C
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 72-81
• Serial:
  • ACI Materials Journal
  • Volume: 106
  • Issue Number: 1
  • Publisher: American Concrete Institute (ACI)
  • ISSN: 0889-325X
  • Serial URL: https://www.concrete.org/publications/acimaterialsjournal.aspx

Subject/Index Terms

• TRT Terms: Anchors (Structural connectors); Cement; Concrete; Ductility; Load transfer; Tensile strength
• Uncontrolled Terms: Pullout capacity
• Subject Areas: Highways; Materials; I30: Materials;

Filing Info

• Accession Number: 01121918
• Record Type: Publication
• Report/Paper Numbers: 106-M10
• Files: TRIS
• Created Date: Feb 17 2009 12:32PM