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Influence of strain rate on laterally confined concrete columns subjected to cyclic loading

Published online by Cambridge University Press:  31 January 2011

S.H. Perry ,
A.H. Al-Shaikh  and
H.K. Cheong
S.H. Perry
Affiliation:
Imperial College of Science and Technology, Department of Civil Engineering, London, SW7 2BU, United Kingdom
A.H. Al-Shaikh
Affiliation:
Imperial College of Science and Technology, Department of Civil Engineering, London, SW7 2BU, United Kingdom
H.K. Cheong
Affiliation:
Imperial College of Science and Technology, Department of Civil Engineering, London, SW7 2BU, United Kingdom
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Abstract

This paper describes the effect of cyclic loading upon the compressive strength, the stress-strain relationship, and the energy absorption and dissipation characteristics of short concrete columns (stub columns) at various slow strain rates. Comparison is made with columns loaded monotonically at similar strain rates. The columns were confined laterally by high-tensile steel bolts, inserted horizontally in two orthogonal directions through preformed ducts; the annular space between ducts and bolts was grouted with high-strength epoxy resin. Both steel and concrete deformational response was measured. Significant enhancement of the strength and ductility of the concrete was obtained. Columns displayed large energy absorption and dissipation capacity under cyclic loading. The validity of an envelope curve to describe cyclic behavior is discussed.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 2 , April 1986 , pp. 382 - 389
Copyright
Copyright © Materials Research Society 1986

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