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Keywords

RC slender column, Strengthening, Steel jacket, Longitudinal and transverse strips, Slenderness ratio

Document Type

Article

Abstract

Many factors cause the reinforced concrete (RC) columns to deteriorate, so removing or replacing the damaged columns may be costly and impractical due to the compromised structural integrity. This issue is regarded as one of the significant challenges facing structural engineers. Structural strengthening and repair for damaged RC structures have been developed as part of strengthening techniques. The common method of strengthening RC columns involves a steel jacket constructed from four steel angles with battens. This study introduced an effortless and economical alternative strengthening technique. They are strengthened by longitudinal and transverse thin steel plate strips (0.5 mm thickness) set at 0.25 of the column's length at mid-height. This research concentrates on RC slender columns, which have a small cross-section relative to their height. Slenderness is an essential factor influencing the performance of these columns, especially when they are under eccentric loading conditions. The effect of this strengthening was experimentally investigated on six rectangular self-compacting RC slender columns subjected to eccentric loading and varying slenderness ratios. The experimental results show that the enhancement in column capacity was from 4.25% to 5.31%, and the increase in column stiffness for reducing lateral deflection was from 1.71% to 3.83%. The enhancement in energy absorption capacity (the area under the Load – Deflection in kN.mm) was between 9.65% to 37.45%, which is clear as the slenderness ratio increases. Furthermore, strengthening the columns decreased strain, delayed failure, and changed the failure position. This technique presents structural engineers a dependable and secure way to strengthen RC slender columns in an effective and economical way.

DOI

10.30684/2412-0758.1573

First Page

1

Last Page

18

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