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Experimental and numerical evaluation of the strength and ductility of regular and cross spirally circular reinforced concrete columns for tall buildings under eccentric loading
Author(s) -
Havaei Gh. Reza,
Keramati Abolghassem
Publication year - 2011
Publication title -
the structural design of tall and special buildings
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.895
H-Index - 43
eISSN - 1541-7808
pISSN - 1541-7794
DOI - 10.1002/tal.534
Subject(s) - structural engineering , ductility (earth science) , spiral (railway) , materials science , eccentric , reinforced concrete , bending moment , bending , displacement (psychology) , flexural strength , composite material , engineering , mechanical engineering , psychology , creep , psychotherapist
This research investigates the behaviour of reinforced concrete (RC) columns subjected to eccentric loading (combination of axial loading and bending moment) for tall buildings with experimental and numerical methods. The columns are reinforced and confined with regular spiral and cross spiral (new technique). The new confinement technique uses two opposing spirals (cross spirals) to confine RC circular columns in order to enhance their strength and ductility. Fourteen RC circular columns subjected to different load eccentricities with two different grades of spirals steel are experimentally tested. The force, axial and lateral displacement and concrete strains in different locations are measured during the testing. The columns are 1000‐mm long with two hunched heads of 500‐mm height. The experimental and numerical results are compared and utilized to develop design guidelines of RC columns using the new confinement technique. Copyright © 2009 John Wiley & Sons, Ltd.