Repair of Columns Using Collars With Circular Reinforcement

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Title: Repair of Columns Using Collars With Circular Reinforcement

Author(s): Gary J. Klein and Albert J. Gouwens

Publication: Concrete International

Volume: 6

Issue: 7

Appears on pages(s): 23-31

Keywords: columns (supports); friction; load transfer; reinforced concrete; repairs; shear strength; strength-ening.

Date: 7/1/1984

Abstract:
Concrete collars can be used in several ways to repair and strengthen concrete structures, In most applications, the critical function of the collar is to transfer vertical load to the column. Reinforcement encircling the column can be used to transfer load through shear friction. This article presents the theoretical normal force and friction coefficients for circularly reinforced appropriate Load tests simulating actual repair installations collars. the theoretical capacity. Verify