Using Two‐Way Prestressed Semicircular Steel Plate for Construction of Reinforced Concrete Cylinder Column

Abstract

A concrete column has a significant influence on constructions because the component withstands the major weight of the whole structure. However, the ordinary concrete column has limited capacity to resist to multiaxial loadings. Since steel plate is one of the most common materials used in construction, concrete reinforced with steel plates based on prestressing reinforcement technology would be a directly applicable solution to the enhancement of mechanical property. In this study, a new reinforcement method upon concrete cylinder column used a two-way prestressed semicircular steel plate, which has already been patented. The study firstly analyzed the stress-bearing situation of the short concrete column reinforced by a two-way prestressed semicircular steel plate. The considerable substitution effect of vertical prestressing force on the concrete column was explored. The multiple restriction effects of horizontal prestressing force, semicircular steel plate, and stirrup were examined. Thereby, the calculation model was derived for the prestressed structure. Secondly, the formula was verified by experiments with close agreements. The result indicated that a unified strength theory was applicable to the theoretical calculation for short concrete column reinforced with a prestressed semicircular steel plate under axial compression, providing the foundation for analytical computation of prestressed semicircular steel plate-reinforced concrete column structures.

Experimental Research on Axial Compression of Reinforced Concrete Short Circular Columns Strengthened with Prestressed Semicircular Steel Plates

“…e application of prestress reinforcement in a building structure improves the force performance of the original structure by enhancing crack resistance, structural carrying capacity, and durability [1][2][3]. Currently varying methods for the prestressed reinforcement of concrete columns are developed comprising prestressed rod, prestressed strip, and prestressed steel strand reinforcement methods [4][5][6][7].…”

Cyclic Shear Performance of Reinforced Concrete Columns Strengthened by External Steel Rods

“…The transverse confinement techniques that are widely applied to the reinforcement and retrofitting of RC columns with insufficient seismic capacity include external steel jacketing [5][6][7][8][9][10][11], fiber-reinforced plastic (FRP) composite wrapping [12][13][14][15][16][17], external posttensioning or prestressing [4,[18][19][20][21][22], and bonded steel plating [23][24][25][26][27][28]. These reinforcement methods should improve the RC columns' seismic capacity and provide precision, simplicity, and economic feasibility in construction, as well as convenience in maintenance.…”