Steel Fiber High-strength Reinforced Concrete:
A New Solution For Earthquake Strengthening Of
Old R/C Structures
Author(s)
A. G. Tsonos
Abstract
In this study a new innovative method of earthquake-resistant strengthening of
reinforced concrete structures is presented for the first time. Strengthening
according to this new method consists of the construction of steel fiber highstrength
concrete jackets without conventional reinforcement, which is usually,
applied in the construction of conventional reinforced concrete jackets (i.e.
longitudinal reinforcement, stirrups, hoops). The proposed in this study new
innovative steel fiber high-strength or ultra high-strength concrete jackets were
proved to be much more effective than the reinforced concrete jackets and the
FRP-jackets when used for the earthquake-resistant strengthening of reinforced
concrete structural members.
Keywords: steel fiber high-strength concrete, reinforced concrete jackets, beamcolumn
joints, columns, cyclic loads.
1 Introduction
Damage incurred by earthquakes over the years has indicated that many
reinforced concrete (R/C) buildings, designed and constructed during the 1960s
and 1970s, were found to have serious structural deficiencies today. These
deficiencies are mainly due to lack of capacity design approach and/or poor
detailing of the reinforcement. As a result, lateral strength and ductility of these
structures were minimal and hence some of them collapsed [1–3]. One of the
most popular pre-and post-earthquake retrofitting methods for columns, beamcolumn
joints and walls is the use of reinforced concrete jacketing. In retrofitting
Keywords
steel fiber high-strength concrete, reinforced concrete jackets, beamcolumn
joints, columns, cyclic loads.
Related Book
Other papers in this volume
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