T-shaped beam with bilateral reinforcing devices

Abstract

The T-shaped beam with the bilateral reinforcing devices comprises a T-shaped beam body, a concrete layer is poured on the upper end face of a flange plate of the T-shaped beam body, and a first steel plate is laid on the concrete layer. A second steel plate adheres to a web of the T-shaped beam body, a prestress anchoring device is welded to the outer side wall of the second steel plate and comprises a third steel plate, a plurality of fourth steel plates are welded to one face of the third steel plate and perpendicular to the long edge at equal intervals, a plurality of through holes are formed in the fourth steel plates, and a plurality of steel strands are tensioned in the through holes; the long edge of the third steel plate is vertically welded with the second steel plate; and the edge of the fourth steel plate vertical to the third steel plate is welded with the second steel plate. According to the T-shaped beam with the reinforcing devices on the two sides, the T-shaped beam has better ductility and higher bearing capacity.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge reinforcement devices and relates to a T-shaped beam with a double-side reinforcement device. Background Art

[0002] The volume of transportation in modern society is constantly increasing. Under the influence of factors such as car weight and car speed, the bearing capacity of bridges can no longer meet the existing traffic needs. The natural aging of bridges due to long-term operation and the influence of environmental factors have caused the decline in the use function of T-beams and the reduction of safety and durability, which in turn caused a decrease in the bearing capacity of bridges; coupled with the frequent occurrence of vehicle overloading, many bridges have suffered varying degrees of damage and defects. At present, the main reinforcement method in my country is unilateral reinforcement in the tension zone. Although reinforcing the concrete beam only on the tension side can improve the bearing capacity of the T-beam, excessive reinforcement will cause brittle failure similar to "over-reinforced beams", and as the bearing capacity continues to increase, the ductility will gradually decrease. The T-beam with a double-sided reinforcement device in the utility model is reinforced in the tension zone while anchoring the steel plate in the compression zone to form a force form similar to a "double-reinforced beam", so that the ductility of the T-beam is better and the bearing capacity is higher. Utility Model Content

[0003] The utility model aims to provide a T-shaped beam with a double-side reinforcement device, which can make the T-shaped beam have the characteristics of better ductility and higher bearing capacity.

[0004] The technical scheme adopted by the utility model is that a T-beam with a double-sided reinforcement device comprises a T-beam body, a concrete layer is cast on the upper end surface of a flange plate of the T-beam body, a first steel plate is laid on the concrete layer; a second steel plate is bonded to the web of the T-beam body, a prestressed anchoring device is welded to the outer side wall of the second steel plate, the prestressed anchoring device comprises a third steel plate, a plurality of fourth steel plates are welded perpendicularly and equidistantly to a long side on one side of the third steel plate, a plurality of through holes are provided on the fourth steel plate, a plurality of steel strands are tensioned in the through holes; the long side of the third steel plate is perpendicularly welded to the second steel plate, and the side of the fourth steel plate perpendicular to the third steel plate is welded to the second steel plate.

[0005] The utility model is also characterized in that:

[0006] It also includes a first chemical anchor bolt, which penetrates the first steel plate and the concrete layer and is fixedly connected to the flange plate of the T-beam body.

[0007] It also includes a steel plate pressure strip, which is arranged on the outer side wall of the second steel plate.

[0008] It also includes a second chemical anchor bolt, which penetrates the steel plate strip and is fixedly connected to the second steel plate and the web of the T-beam body.

[0009] The second steel plate is at least two L-shaped steel plate hoops or U-shaped steel plate hoops.

[0010] The steel strand is fixed in the through hole of the fourth steel plate through an anchor, and an anchor pad is arranged between the anchor and the fourth steel plate.

[0011] The outside of the steel strand is wrapped with a PE sheath.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model reinforces the steel plate in the compression zone of the T-beam by pre-tightening the long bolts penetrating the flange plate and applying structural adhesive for bonding at the same time. The long bolts can limit the peeling phenomenon between the steel plate and the concrete and prevent the local buckling of the steel plate.

[0014] 2. A steel strip is pasted on the upper end of the web steel plate of the T-beam, and a chemical anchor bolt is driven in to anchor it. This structure can significantly reduce the risk of web cracks in the T-beam when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the T-beam structure with double-sided reinforcement devices of the present application;

[0016] Figure 2 This is a cross-sectional view of a T-beam structure with a double-sided reinforcement device in the present application;

[0017] Figure 3 It is a plan view of the prestressed anchoring device of the present application.

[0018] In the figure, 1. T-beam body, 2. concrete layer, 3. first steel plate, 4. first chemical anchor, 5. second steel plate, 6. steel plate pressure strip, 7. second chemical anchor, 8. prestressed anchoring device, 81. third steel plate, 82. fourth steel plate, 83. anchor plate, 84. anchor, 9. steel strand, 10. PE casing. DETAILED DESCRIPTION

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0020] The utility model has a T-beam with double-side reinforcement devices, such as Figure 1 As shown, it includes a T-beam body 1, a concrete layer 2 is cast on the upper end surface of the flange plate of the T-beam body 1, a first steel plate 3 is laid on the concrete layer 2, and a first chemical anchor 4 penetrates the first steel plate 3 and the concrete layer 2 and is anchored to the flange plate of the T-beam body 1; a second steel plate 5 is bonded to the web of the T-beam body 1, and the second steel plate 5 is at least two L-shaped steel plate hoops, and the lower limbs of the steel plate hoops are glued to form a U-shaped steel plate hoop, or the second steel plate 5 is a U-shaped steel plate hoop; a steel plate pressure strip 6 is arranged on the upper end of the outer side of the second steel plate 5, which can be fixed by welding or gluing; a second chemical anchor 7 penetrates the steel plate pressure strip 6 and is anchored to the second steel plate 5 and the web of the T-beam body 1, as shown in FIG. Figure 2As shown; the second steel plate 5 outer wall welded prestressed anchor device 8, as Figure 3 As shown, the prestressed anchoring device 8 includes a third steel plate 81, and a plurality of fourth steel plates 82 are welded on one surface of the third steel plate 81 at right angles to the long side and at equal intervals. A plurality of through holes are provided on the fourth steel plate 82, and a plurality of steel strands 9 are tensioned in the through holes. The steel strands 9 are fixed to the prestressed anchoring device 8 through anchor pads 83 and anchors 84; the long side of the third steel plate 81 is welded perpendicularly to the second steel plate 5, and the side of the fourth steel plate 82 perpendicular to the third steel plate 81 is welded to the second steel plate 5.

[0021] The outer side of the steel strand 9 is wrapped with a PE sleeve 10, which can effectively prevent the steel strand 9 from being corroded by the external environment.

[0022] The working principle of this utility model is:

[0023] A concrete layer 2 and a first steel plate 3 are laid on the compression side of the T-beam body 1, a second steel plate 5 is bonded on the tension side and a prestressed anchor device 8 is welded, and external prestressing is tensioned by a steel strand 9: that is, the external prestressed rigid strand is tensioned at the bottom of the T-beam, and at the same time, the first steel plate 3 is anchored at the top of the T-beam, and works together with the concrete layer 2 on the compression side to achieve bearing capacity reinforcement and ductility reinforcement.

[0024] (1) Reinforcement of the compression side of the T-beam body 1

[0025] The upper end surface of the flange plate of the T-beam body 1 is roughened, and dust and other debris in the gap are removed by a high-power hair dryer, and then the concrete layer 2 is poured; commercial building A and B structural adhesives are taken, weighed according to the adhesive ratio of 5:2, and manually stirred until the color is uniform; the loose scum on the top surface of the concrete layer 2 is brushed off with a wire wheel, and the dust is blown off with a hair dryer, and the stirred adhesive is applied to the upper surface of the flange plate. After the application is completed, the first steel plate 3 is laid on the upper end surface of the concrete layer 2. The above operations ensure that the first steel plate 3 can fully contact with the surface of the concrete layer 2; the pressure side is drilled by the up-and-down drilling method, and the up-and-down drilling method can prevent the concrete around the cavity from being damaged by the wedge-shaped body; the first chemical anchor bolt 4 is used to anchor the first steel plate 3, the concrete layer 2 and the flange plate of the T-beam body 1;

[0026] (2) Strengthening the tensile side of the T-beam body 1

[0027] Remove dust and other debris from the web of the T-beam body 1, apply epoxy resin on the surface, paste the second steel plate 5 in sequence, weld or paste the steel plate pressure strip 6 on the upper end of the outer side of the second steel plate 5, and drive the second chemical anchor 7 to anchor it; weld the prestressed anchor device 8 on the lower end of the outer side of the second steel plate 5: first, use full penetration welding to vertically weld the third steel plate 81 to the second steel plate 5, and weld the fourth steel plate 82 after reaching the welding strength, and multiple steel strands 9 pass through the through holes on the fourth steel plate, and use anchor pads 83 and anchors 84 to fix them;

[0028] (3) External prestressing of T-beam body 1

[0029] A tensioning force is applied to the steel bundle formed by the plurality of steel strands 9 to complete the double-sided reinforcement of the concrete T-beam.

[0030] Embodiment 1:

[0031] A T-beam with a double-sided reinforcement device comprises a T-beam body 1, an ultra-high performance concrete layer 2 is cast on the upper end surface of the flange plate of the T-beam body 1, and the ultra-high performance concrete layer 2 has ultra-high durability and ultra-high mechanical properties; a first steel plate 3 is laid on the ultra-high performance concrete layer 2; a second steel plate 5 is bonded on the web of the T-beam body 1, and the second steel plate 5 is two L-shaped steel plate hoops, and the two L-shaped steel plate hoops are sequentially pasted on the web of the T-beam body 1, and the lower limbs form a U-shaped steel plate hoop; a prestressed anchor device 8 is welded to the outer wall of the second steel plate 5, and the prestressed anchor device 8 comprises a third steel plate 81, and a plurality of fourth steel plates 82 are welded on one surface of the third steel plate 81 at right angles to the long side, and a plurality of through holes are provided on the fourth steel plate 82, and a plurality of steel strands 9 are tensioned in the through holes to form a steel bundle; the long side of the third steel plate is welded perpendicularly to the second steel plate 5, and the side of the fourth steel plate 82 perpendicular to the third steel plate 81 is welded to the second steel plate 5.

[0032] Embodiment 2:

[0033] A T-beam with a double-sided reinforcement device includes a T-beam body 1, an ultra-high performance concrete layer 2 is cast on the upper end surface of the flange plate of the T-beam body 1, and the ultra-high performance concrete layer 2 has ultra-high durability and ultra-high mechanical properties; a first steel plate 3 is laid on the ultra-high performance concrete layer; a second steel plate 5 is bonded to the web of the T-beam body 1, and the second steel plate 5 is a U-shaped steel plate hoop; a prestressed anchor device 8 is welded to the outer wall of the second steel plate 5, and the prestressed anchor device 8 includes a third steel plate 81, and a plurality of fourth steel plates 82 are welded on one surface of the third steel plate 81 at right angles to the long side, and a plurality of through holes are opened on the fourth steel plate 82, and a plurality of steel strands 9 are tensioned in the through holes to form a steel bundle; the long side of the third steel plate is welded perpendicularly to the second steel plate 5, and the side of the fourth steel plate 82 perpendicular to the third steel plate 81 is welded to the second steel plate 5.

[0034] Embodiment 3:

[0035] A T-beam with a double-sided reinforcement device comprises a T-beam body 1, an ultra-high performance concrete layer 2 is cast on the upper end surface of the flange plate of the T-beam body 1, and the ultra-high performance concrete layer 2 has ultra-high durability and ultra-high mechanical properties; a first steel plate 3 is laid on the ultra-high performance concrete layer; a second steel plate 5 is bonded to the web of the T-beam body 1; a prestressed anchor device 8 is welded to the outer wall of the second steel plate 5, and the prestressed anchor device 8 comprises a third steel plate 81, the third steel plate 81 is an A-shaped steel plate, and a plurality of fourth steel plates 82 are welded on one surface of the third steel plate 81 at right angles to the long side, and the fourth steel plate 82 is a B-shaped steel plate, and a plurality of through holes are provided on the fourth steel plate 82, and a plurality of steel strands 9 are tensioned in the through holes to form a steel bundle; the long side of the third steel plate is welded perpendicularly to the second steel plate 5, and the side of the fourth steel plate 82 perpendicular to the third steel plate 81 is welded to the second steel plate 5.

[0036] The outer side of the steel strand 9 is wrapped with a PE sleeve 10 .

Claims

1. T-beam with double-sided reinforcement, characterized in that: The invention comprises a T-beam body (1), wherein a concrete layer (2) is cast on the upper end surface of the flange plate of the T-beam body (1), and a first steel plate (3) is laid on the concrete layer (2); a second steel plate (5) is bonded to the web of the T-beam body (1), and a prestressed anchor device (8) is welded to the outer wall of the second steel plate (5), wherein the prestressed anchor device (8) comprises a third steel plate (81), and a plurality of fourth steel plates (82) are welded on one surface of the third steel plate (81) at right angles to the long side, and a plurality of through holes are provided on the fourth steel plate (82), and a plurality of steel strands (9) are tensioned in the through holes; the long side of the third steel plate (81) is welded to the second steel plate (5) at right angles, and the side of the fourth steel plate (82) that is perpendicular to the third steel plate (81) is welded to the second steel plate (5).

2. The T-beam with double-sided reinforcement device according to claim 1, characterized in that: It also comprises a first chemical anchor bolt (4), which penetrates the first steel plate (3) and the concrete layer (2) and is fixedly connected to the flange plate of the T-beam body (1).

3. The T-beam with double-sided reinforcement device according to claim 1, characterized in that: It also includes a steel plate pressure strip (6), and the steel plate pressure strip (6) is arranged on the outer side wall of the second steel plate (5).

4. The T-beam with double-sided reinforcement device according to claim 3, characterized in that: It also comprises a second chemical anchor bolt (7), which penetrates the steel plate layer strip (6) and the second steel plate (5) and is fixedly connected to the web of the T-beam body (1).

5. The T-beam with double-sided reinforcement device according to claim 1, characterized in that: The second steel plate (5) is at least two L-shaped steel plate hoops or U-shaped steel plate hoops.

6. The T-beam with double-sided reinforcement device according to claim 1, characterized in that: The steel strand (9) is fixed in the through hole of the fourth steel plate (82) via an anchor (84), and an anchor pad (83) is arranged between the anchor (84) and the fourth steel plate (82).

7. The T-beam with double-sided reinforcement device according to claim 1, characterized in that: The outer side of the steel strand (9) is wrapped with a PE casing (10).

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