Abstract
The application of steel fiber reinforced polymer (SRP) as a means of increasing the capacity of masonry columns is investigated in this study. The behavior of 23 solid-brick specimens that are externally wrapped by SRP sheets in low volumetric ratios is presented. The specimens are subjected to axial monotonic load until failure occurs. Two widely used types of masonry columns of differing square cross-sections were tested in compression (square and octagonal cross-sections). It is concluded that SRP-confined masonry behaves very much like fiber reinforced polymers (FRP)-confined masonry. Confinement increases both the load-carrying capacity and the deformability of masonry almost linearly with average confining stress. A comparative analysis between experimental and theoretical values computed in compliance with the Italian Council of Research (CNR) was also developed.
Highlights
For many years external confinement has been considered an effective method for strengthening reinforced concrete and masonry compression members due to the urgent need to upgrade deficient columns to meet current design standards
The subject of reinforcement of existing masonry structures is of notable importance in light of the world’s architectural heritage, and it is of particular interest in those areas struck by earthquakes, where the aim of reconstruction is a substantial seismic upgrading of existing constructions
This paper is concerned with the experimental study of masonry columns characterized by square and octagonal cross-sections confined with high strength steel fiber
Summary
For many years external confinement has been considered an effective method for strengthening reinforced concrete and masonry compression members due to the urgent need to upgrade deficient columns to meet current design standards. Many investigations have been conducted into the behavior of FRP-confined masonry and, as a result, a number of stress-strain models have been proposed. There is a lack of knowledge on the stress-strain behavior of masonry columns confined with high strength steel cords. This new strengthening material, which can be made from coils found on the market, is available brass coated or galvanized with zinc, for greater protection against corrosion. This paper is concerned with the experimental study of masonry columns characterized by square and octagonal cross-sections confined with high strength steel fiber. Concerning its confining characteristics, SRP reinforcement exhibits a linear elastic behavior up to failure and exerts an ever-increasing confining pressure on the masonry core
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