Concrete-Filled Steel Tubular Column-Steel Plate Concrete Ring Beam Joint and Construction Method Thereof

Abstract

The present invention relates to a concrete-filled steel tubular column-steel plate concrete ring beam joint, comprising: a concrete-filled steel tubular column, a steel plate concrete ring beam and reinforced concrete frame beams. The steel plate concrete ring beam comprises: a steel plate and a reinforcing cage, wherein concrete grouting holes are arranged in the middle of the steel plate; both the steel plate and the reinforcing cage are of a ring shape, and the ring-shaped steel plate and the reinforcing cage are coaxially arranged; the steel plate concrete ring beam is sheathed and fixed on the outer side wall of the concrete-filled steel tubular column; and an end of the reinforced concrete frame beam extends into the steel plate concrete ring beam, and stressed reinforcements of the reinforced concrete frame beam are connected to the steel plates. The steel plate concrete ring beam is of a centrosymmetric ring-shaped or eccentric ring-shaped construction. The stressed reinforcement of the reinforced concrete frame beam is anchored by the ring beam joint through the steel plates, so that the seismic performance of the connection joint is ensured, the section width of the steel plate concrete ring beam can be significantly reduced, and the spatial applicability of the joint is improved. The present invention also relates to a construction method of a concrete-filled steel tubular column-steel plate concrete ring beam joint, belonging to the field of building structures.

Claims

1. A concrete-filled steel tubular column-steel plate concrete ring beam joint, comprising: a concrete-filled steel tubular column, a steel plate concrete ring beam and reinforced concrete frame beams, wherein the steel plate concrete ring beam comprises: a steel plate ring, a reinforcing cage and concrete; concrete grouting holes are arranged in the middle of the steel plate; both the steel plate and the reinforcing cage are of a ring shape, and the ring-shaped steel plate and the reinforcing cage are coaxially arranged; the steel plate concrete ring beam is sheathed and fixed on the outer side wall of the concrete-filled steel tubular column; and an end of the reinforced concrete frame beam extends into the steel plate concrete ring beam, and stressed reinforcements of the reinforced concrete frame beam are connected to the steel plates.

2. The concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 1, wherein the steel plate concrete ring beam is of a centrosym metric ring shape, and the reinforced concrete frame beam is circumferentially arranged along the steel plate concrete ring beam.

3. The concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 1, wherein the steel plate concrete ring beam is of an eccentric ring shape, and the reinforced concrete frame beam is arranged along an eccentric side of the steel plate concrete ring beam.

4. The concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 1, wherein the stressed reinforcements of the reinforced concrete frame beam pass through the steel plates and are connected to same, and the end of the stressed reinforcement that passes through the steel plate is provided with an external thread, an outer side of which is sheathed with a nut.

5. The concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 1, wherein the reinforcing cage comprises several circumferential reinforcements and several radial stirrups, the circumferential reinforcements comprise an inner row of circumferential reinforcements and an outer row of circumferential reinforcements which are coaxially arranged, the inner row of circumferential reinforcements and the outer row of circumferential reinforcements which are positioned in the same horizontal plane are a group of circumferential reinforcements, and at least two groups of circumferential reinforcements are distributed along the axial direction of the circumferential reinforcements; and several radial stirrups are radially sheathed outside the circumferential reinforcements.

6. The concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 1, wherein at least one shear ring reinforcement is arranged within the section height of the steel plate concrete ring beam on the outer side wall of the concrete-filled steel tubular column, and the shear ring reinforcement is welded on the outer side wall of the concrete-filled steel tubular column; and when the height of the steel plate concrete ring beam is greater than 450 mm, one circumferential waist reinforcement is arranged in the inner row and the outer row of the reinforcing cage, and the diameter of the circumferential waist reinforcement is greater than or equal to 12 mm.

7. The concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 5, wherein the spacing between the steel plate and the outer row of circumferential reinforcement is greater than or equal to 25 mm.

8. The concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 1, wherein the height of the steel plate concrete ring beam is greater than the height of the reinforced concrete frame beam, and the width of the steel plate concrete ring beam is greater than or equal to 150 mm.

9. A construction method of the concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 1, wherein the method comprises the steps of: S1: determining a section size of a steel plate concrete ring beam, a steel plate size, and the diameter, the number and a spacing of a circumferential reinforcement and a radial stirrup, and tapping an end of a stressed reinforcement of a reinforced concrete frame beam to obtain an external thread; S2: processing the steel plate to be annular, perforating in advance at a position on the steel plate corresponding to the extension of the stressed reinforcement of the reinforced concrete frame beam, and arranging concrete grouting holes in the middle of the steel plate; S3: manufacturing a steel plate-reinforcing cage; S4: pouring concrete into a steel tube to form a concrete-filled steel tubular column, and pasting and welding shear ring reinforcements on the outer wall of the concrete-filled steel tubular column; S5: manufacturing a formwork of the steel plate concrete ring beam and a formwork of the reinforced concrete frame beam on site, and hoisting the steel plate-reinforcing cage manufactured in step S3 into the formwork of the steel plate concrete ring beam for positioning and fixing; S6: extending the stressed reinforcement of the reinforced concrete frame beam into the reinforcing cage, passing through a preset opening on the steel plate, screwing the nut in conjunction with the external thread of the stressed reinforcement, and anchoring the stressed reinforcement on the steel plate; and S7: pouring concrete into the formwork of the steel plate concrete ring beam and the formwork of the reinforced concrete frame beam to form an integral rigid ring beam joint.

10. The construction method of the concrete-filled steel tubular column-steel plate concrete ring beam joint according to claim 9, wherein in step S6, the length of the external thread tapped at the end of the stressed reinforcement is at least 50 mm.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a top view of a steel plate concrete ring beam of a centrosymmetric ring shape.

[0026] FIG. 2 is a top view of a steel plate concrete ring beam of an eccentric ring shape.

[0027] FIG. 3 is a front view of FIG. 1.

[0028] FIG. 4 is a front view of FIG. 2.

[0029] FIG. 5 is a structural schematic diagram of section A-A of FIG. 1.

[0030] FIG. 6 is a structural schematic diagram of section B-B of FIG. 3.

[0031] FIG. 7 is a structural schematic diagram of section C-C of FIG. 4.

[0032] FIG. 8 is a schematic diagram of the extension of a steel plate with concrete grouting holes.

[0033] The numbers in the figures and the names of the corresponding components are: 1 Concrete-filled steel tubular column, 2 Steel plate concrete ring beam, 3 Reinforced concrete frame beam, 4 Shear ring reinforcement, 5 Inner row of circumferential reinforcement, 6 Outer row of circumferential reinforcement, 7 Radial stirrup, 8 Steel plate, 9 Nut, 10 Stirrup of reinforced concrete frame beam, 11 Stressed reinforcement, 12 Concrete grouting hole. In the figures, b represents the width of the steel plate concrete ring beam, b.sub.1 represents the distance from a lower shear ring reinforcement to the bottom surface of the steel plate concrete ring beam, b.sub.2 represents the distance from an upper shear ring reinforcement to the bottom surface of the steel plate concrete ring beam, b.sub.3 represents the height difference between the steel plate concrete ring beam and the reinforced concrete frame beam, and h represents the height of the steel plate concrete ring beam.

DETAILED DESCRIPTION OF EMBODIMENTS

[0034] The present invention will be described in further detail below with reference to the accompanying drawings.

Embodiment 1

[0035] A concrete-filled steel tubular column-steel plate concrete ring beam joint comprises: a concrete-filled steel tubular column, a steel plate concrete ring beam of a centrosym metric ring shape, reinforced concrete frame beams, and shear ring reinforcements. The steel plate concrete ring beam comprises: an I-shaped steel plate, a reinforcing cage, and concrete. The steel plate is preset with holes through which the stressed reinforcement of the reinforced concrete frame beam passes and concrete grouting holes which are convenient for concrete to flow on both sides of the steel plate. As shown in FIG. 5 and FIG. 6, the shear ring reinforcements are pasted and welded to the upper and lower parts within the height of the steel plate concrete ring beam on the outer side wall of the concrete-filled steel tubular column. Shear ring reinforcements are used to inhibit the bond-slip between the steel plate concrete ring beam and the outer wall of the concrete-filled steel tubular column. The steel plate and the reinforcing cage are each of a centrosym metric ring shape, and the ring-shaped steel plate and the reinforcing cage are coaxially arranged. Steel plates are arranged inside the reinforcing cage, and the stressed reinforcements of the reinforced concrete frame beam are connected to the steel plates, so that the seismic requirements of the connection joints are met, the joint space can be greatly optimized, and the section width of the steel plate concrete ring beam is reduced.

[0036] The steel plate concrete ring beam is sheathed and fixed on the outer side wall of the concrete-filled steel tubular column; and the stressed reinforcements of the reinforced concrete frame beam pass through the steel plates and are connected to the steel plates, and is positioned outside the steel plate concrete ring beam. The stressed reinforcements of the reinforced concrete frame beam pass through the steel plates and are connected to same, and the end of the stressed reinforcement that passes through the steel plate is provided with an external thread, an outer side of which is sheathed with a nut. The stressed reinforcement is anchored with the steel plate by a nut, so that the seismic anchoring requirement of the stressed reinforcement is guaranteed, and the connection mode is simple, convenient, safe and reliable.

[0037] The reinforcing cage comprises several circumferential reinforcements and several radial stirrups, wherein the circumferential reinforcements comprise an inner row of circumferential reinforcements and an outer row of circumferential reinforcements which are coaxially arranged, the inner row of circumferential reinforcements and the outer row of circumferential reinforcements which are positioned in the same horizontal plane are a group of circumferential reinforcements, and at least two groups of circumferential reinforcements are distributed along the axial direction of the circumferential reinforcements; and several radial stirrups are radially sheathed outside the circumferential reinforcements. In this embodiment, two groups of circumferential reinforcements are provided along the axial direction of the circumferential reinforcements. The space between the steel plate and the outermost circumferential reinforcement in each group of circumferential reinforcements is taken as 30 mm. The height of the steel plate concrete ring beam is greater than the height of the reinforced concrete frame beam, and in this embodiment, the height of the steel plate concrete ring beam is taken as 500 mm, the height of the reinforced concrete frame beam is taken as 450 mm, and the diameter of the circumferential waist reinforcement is taken as 14 mm. The width of the steel plate concrete ring beam is not less than 150 mm, and when taken as 200 mm in this embodiment, which is convenient for the steel plate concrete ring beam to reliably transfer an internal force of a beam end of the reinforced concrete frame beam, ensuring the ring beam joint to meet the lowest seismic performance requirement.

[0038] A construction method of a concrete-filled steel tubular column-steel plate concrete ring beam joint comprises the following steps:

[0039] S1: computing and determining a section size of a steel plate concrete ring beam, a steel plate size, and the diameter, the number and a spacing of a circumferential reinforcement and a radial stirrup according to the stress at the joint, and tapping an end of a stressed reinforcement of a reinforced concrete frame beam to obtain an external thread, wherein the length of the external thread tapped at the end of the stressed reinforcement is at least 50 mm;

[0040] S2: processing the steel plate to be annular, perforating in advance at a position on the steel plate corresponding to the extension of the stressed reinforcement of the reinforced concrete frame beam, and arranging concrete grouting holes in the middle of the steel plate;

[0041] S3: manufacturing a steel plate-reinforcing cage;

[0042] S4: pouring concrete into a steel tube to form a concrete-filled steel tubular column, and pasting and welding shear ring reinforcements on the outer wall of the concrete-filled steel tubular column;

[0043] S5: manufacturing a formwork of the steel plate concrete ring beam and a formwork of the reinforced concrete frame beam on site, and hoisting the steel plate-reinforcing cage manufactured in step S3 into the formwork of the steel plate concrete ring beam for positioning and fixing;

[0044] S6: extending the stressed reinforcement of the reinforced concrete frame beam into the reinforcing cage, passing through a preset opening on the steel plate, screwing the nut in conjunction with the external thread of the stressed reinforcement, and anchoring the stressed reinforcement on the steel plate; and

[0045] S7: pouring concrete into the formwork of the steel plate concrete ring beam and the formwork of the reinforced concrete frame beam to form an integral rigid ring beam joint.

Embodiment 2

[0046] The steel plate concrete ring beam is of an eccentric ring shape, and a steel plate and a reinforcing cage each are of an eccentric ring shape. The steel plate-reinforcing cage is prefabricated. The steel plate concrete ring beam of an eccentric ring shape is more applicable for the large eccentric joint where the frame beam connected to the steel plate concrete ring beam is biased towards one side, and the stress is reasonable.

[0047] The parts not mentioned in this embodiment are the same as those in embodiment 1, and will not be described here again.

[0048] The above-described embodiments are preferred embodiments of the present invention; however, the embodiments of the present invention are not limited to the above-described embodiments, and any other change, modification, replacement, combination, and simplification made without departing from the spirit, essence, and principle of the present invention should be an equivalent replacement and should be included within the scope of protection of the present invention.