Ultra-high-performance concrete reinforced concrete column with fiber reinforced polymers wound around steel pipe
A technology of concrete reinforcement and reinforced concrete columns, which is applied in the direction of columns, pier columns, pillars, etc., can solve the problems that the confinement effect of steel sleeves is not as good as that of steel pipe confinement ultra-high performance concrete, the concrete strength is not high, and the structural integrity is not strong, etc., to achieve Improved corrosion resistance, high strength, and enhanced seismic performance
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[0037] Example one
[0038] Such as figure 1 As shown, when the original reinforced concrete column is a circular structure, first plant the reinforcement 1 on the existing concrete surface; make a half-section steel pipe, hoist it in place and fix it, and weld the two half-circle sections into a closed steel pipe 2; Pour the ultra-high performance concrete 3 in the steel pipe 2; and wrap the FRP cloth 4 outside the steel pipe 2, and perform fire protection treatment on the FRP.
[0039] In this embodiment, the original reinforced concrete column 5 adopts a circular section column with a diameter of 800 mm.
[0040] The planting bar 1 adopts HRB335 steel bar with a diameter of 12mm, and the arrangement spacing along the longitudinal direction of the column is 100mm, and the planting bar depth is 88mm.
[0041] The steel model used for steel pipe 2 is Q345, the thickness is 30mm, and the steel pipe length is 3.5m. The steel tube axis is concentric with the original reinforced concrete...
Example Embodiment
[0044] Example two
[0045] Such as figure 2 As shown, when the original reinforced concrete column is a square structure, first plant the reinforcement 1 on the existing concrete surface; make half a steel tube, hoist it in place, fix it, and weld the two L-shaped section steel members into a closed square steel tube 2; Pour ultra-high performance concrete 3 in the steel pipe 2, and wind FRP cloth 4 outside the steel pipe 2, and fire-proof the FRP.
[0046] In this embodiment, the original reinforced concrete column 5 adopts a square column with a side length of 600 mm.
[0047] The planting bar 1 adopts HRB335 steel bar with a diameter of 12mm, and the arrangement spacing along the longitudinal direction of the column is 100mm, and the planting bar depth is 95mm.
[0048] The steel model used for steel pipe 2 is Q345, the thickness is 20mm, and the steel pipe length is 3m. The steel tube axis is concentric with the original concrete square column.
[0049] The axial compressive str...
Example Embodiment
[0051] Example three
[0052] Such as image 3 As shown, when the original reinforced concrete column is a circular structure, the steel pipe 2 is placed eccentrically. First, the reinforcement 1 is planted on the existing concrete surface; the steel pipe of half section is made, hoisted in place and fixed, and the two half The cross-section circular steel plate is welded to form a closed steel pipe 2; ultra-high performance concrete 3 is poured into the steel pipe 2, and FRP cloth 4 is wound around the steel pipe 2, and the FRP is fire-resistant.
[0053] In this embodiment, the original reinforced concrete column 5 adopts a circular section column with a diameter of 600 mm.
[0054] The planting bar 1 adopts HRB335 steel bar with a diameter of 12mm, and the arrangement distance along the longitudinal direction of the column is 80mm, and the planting bar depth is 105mm.
[0055] The steel type used for steel pipe 2 is Q345, the thickness is 25mm, and the steel pipe length is 3m. The...
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