Behavior of Strengthened RC Columns with CFRP under Biaxial Bending
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Abstract
In this work, the behavior of reinforced concrete columns under biaxial bending is studied. This work aims at studying the strengthening of columns by using carbon fiber reinforced polymer (CFRP). The experimental work includes investigation of eight reinforced concrete columns (150*150*500mm) tested under several load conditions. Variables considered in the test program include; effect of eccentricity and effect of longitudinal reinforcement (Ø12mm or Ø6mm). Test results are discussed based on load – lateral deflection behavior, load –longitudinal deflection behavior, ultimate load and failure modes. The CFRP reinforcement permits
a complete change in the failure mode of the columns .The effect of longitudinal reinforcement in the case of biaxial bending is more pronounced for strengthened columns than for unconfined columns.
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References
. ASTM Designation C143/C143M-00, "Standard Test Method for Slump of Hydraulic-Cement Concrete", 2000, Annual
Book of ASTM Standards, American, Society for Testing and Materials, Philadelphia, Pennsylvania, vol. 4.02
.ACI Committee 440, "Guide for the design and Construction of externally Bonded FRP Systems for Strengthening of Concrete Structures", American Concrete institute, Michigan, USA, 2002.
ACI Committee318M " BUILDING CODE REQUIREMENTS FOR STRUCTURAL CONCRETE (ACI) AND COMMENTRY " American Concrete Institute , Farmington Hills , MI 48331, USA , 2011,503PP
American Society of Testing and Material (ASTM), "Standard Specification for Concrete Aggregates", ASTM C33-02, West Conshohocken, PA, 2002.
ASTM Designation A615/A615M-01b, "Standard Specifications for Deformed and Plain Billet-Steel Bars for Concrete Reinforcement", 2001, Annual Book of ASTM Standards, American Society for Testing and Materials, Philadelphia, Pennsylvania, vol. 1.04.
ASTM Designation C 702-98 (re-approved 2003), "Standard Specification for Reduce Samples of Aggregate To Testing Size", 2003 Annual Book of ASTM Standards, American Society for Testing and Materials, Philadelphia, Pennsylvania, vol. 4.02
ASTM Designation C192/C192M-02, "Making and Curing Concrete Test Specimens in Laboratory", 2002, Annual Book of ASTM Standards, American Society for Testing and Materials, Philadelphia, Pennsylvania, Vol. 4.02.
ASTM Designation C496-96 "Standard specification for splitting tensile strength of cylindrical concrete specimens", 1996
Annual Book of ASTM Standards, American Society for Testing and Material, Philadelphia, Pennsylvania, Section 4, Vol. (4.02), PP1-4, 1996.
Rocca , S , Galti ,N and Nani , A ." Interaction diagram methodology for design of FRP-confined reinforced concrete columns". Construction and Building Materials. 2008 , journal homepage: www.elsevier.com/locate/conbuildmat
Saafi, M., Toutanji, H. A., and Li, Z. "Behavior of concrete columns confined with fiber reinforced polymer tubes".ACI Materials Journal,V.96, No.4, July-August 1999.PP500-509.
Sika CarboDur FRP Composites Constrection for Repair & Strengthening of Structures .. MARCH 2003