Investigation Of The Effectiveness Of Two Styles
Of R/C Jackets In Pre-earthquake Retrofitting
Of Columns And B/c Joints Of R/C Structures
Author(s)
A. G. Tsonos & I. P. Rentzeperis
Abstract
This paper presents the findings of an experimental study to evaluate methods of
retrofit which addresses particular weaknesses that are often found in reinforced
concrete structures, especially older structures, namely the lack of the required
flexural and shear reinforcement within the columns and the lack of the required
shear reinforcement within the joints. Thus, the use of two styles of four-sided
reinforced concrete jackets for the pre-earthquake retrofitting case of columns
and beam-column joints was investigated experimentally. In this paper the
effectiveness of the two jacket styles was also compared.
Keywords: beam-column frames, beams, columns, joints, cyclic loads,
earthquake resistant structures, hinges (structural), reinforced concrete, repairs.
1 Introduction
Damage caused by earthquakes through the years, indicated that some reinforced
concrete buildings designed and constructed in the 1960s and 1970s were found
to have serious structural deficiencies. These deficiencies are mainly a
consequence of a lack of capacity design approach and/or poor detailing of
reinforcement. As a result, lateral strength and ductility of these structures were
minimal.
The feasibility and technical effectiveness of two styles of four-sided
reinforced concrete jacket systems in pre-earthquake retrofitting case of columns
and beam-column joints was investigated in this paper. Thus, three identical
reinforced concrete exterior beam – column – joint – slab – transverse beam
Keywords
beam-column frames, beams, columns, joints, cyclic loads,
earthquake resistant structures, hinges (structural), reinforced concrete, repairs.
Related Book
Other papers in this volume
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