Frame connecting joint pre-buried in core tube shear wall and construction method thereof

Abstract

The invention discloses a frame connecting joint pre-buried in a core tube shear wall and a construction method thereof. The connecting joint comprises a corbel, a first end of the corbel is fixed to a core tube built-in steel plate, and a second end of the corbel is fixed to the core tube built-in steel plate; the first face of the connecting plate is fixed to the second end of the bracket, and the second face is used for being fixedly connected with a frame. The side template is detachably attached to the second surface of the connecting plate; the lap joint plates are fixed to the two sides of the connecting plate; the shear wall outer side horizontal bars are fixed to the faces, close to the side formworks, of the lap joint plates, and horizontal bar protection layers are reserved between the shear wall outer side horizontal bars and the side formworks. Steel bar sleeves are fixed to the upper surface and the lower surface of a bracket, a shear wall longitudinal bar is fixed into each steel bar sleeve, and the non-fixed end of the shear wall longitudinal bar on the outer side is bent in the direction of a side formwork so that a longitudinal bar protection layer can be reduced, and the thickness of the horizontal bar protection layer can be reduced by arranging horizontal bars on the outer side of the shear wall on a lap joint plate; the longitudinal bar on the outermost side is bent outwards, so that the thickness of the longitudinal bar protection layer is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a frame connection node pre-buried inside a core tube shear wall and a construction method thereof. Background Art

[0002] With the vigorous development of the construction industry, the frame-core tube combination structure has become the most mainstream trend in building structures. In the existing frame-core tube combination structure system, the frame is connected by pre-embedded corbels in the shear wall and a connecting plate is set at one end of the corbel. When the shear wall is constructed, the side formwork on one side of the wall is erected on the outside of the connecting plate. Because the connecting plate is thick, it occupies the space of the connecting sleeves of the horizontal reinforcement on the outside of the shear wall and the upper and lower longitudinal reinforcement of the corbel, resulting in a conflict between the sleeves of the horizontal reinforcement on the outside of the shear wall and the longitudinal reinforcement of the shear wall and the connecting plate. The gap between the horizontal reinforcement and sleeve on the outside of the shear wall and the side formwork is too large, resulting in an excessively large steel bar protective layer. The excessively large steel bar protective layer will cause the shear wall in this area to have a risk of excessively wide cracks, affecting the performance of the structure. Summary of the invention

[0003] The invention achieves the purpose of reducing the thickness of the steel bar protective layer by arranging the lap plates, fixing the horizontal bars on the lap plates, and bending the outermost longitudinal bars.

[0004] The present invention discloses a frame connection node embedded in a core tube shear wall, wherein the core tube shear wall is cast on the outer side of a steel plate built into the core tube, and comprises: a corbel embedded in the core tube shear wall, wherein the first end of the corbel is fixed to the surface of the steel plate built into the core tube; a connecting plate, wherein the first surface of the connecting plate is fixed to the second end of the corbel, and the second surface is used for fixed connection with the frame; a side formwork, wherein the side formwork is detachably attached to the second surface of the connecting plate; a pair of lap plates, which are fixed to opposite sides of the connecting plate; two rows of shear wall outer side horizontal ribs, which are respectively fixed to one side of the two lap plates close to the side formwork, and are respectively connected along the two lap plates in opposite directions. The outer side of the shear wall is provided with a first gap between the two rows of outer horizontal bars of the shear wall and the side formwork to form a horizontal bar protection layer; the upper and lower surfaces of the corbel are respectively fixed with at least one row of steel sleeves arranged in a direction parallel to the side formwork, each of the steel sleeves is fixed with a shear wall longitudinal bar extending in a vertical direction, the shear wall longitudinal bar closest to the side formwork starts from the corresponding steel sleeve, first tilts toward the side formwork to a distance from the side formwork that is the designed thickness of the longitudinal bar protection layer, and then continues to extend in the vertical direction, so that a reduced second gap is reserved between the shear wall longitudinal bar closest to the side formwork and the side formwork to form a longitudinal bar protection layer.

[0005] A further improvement of the present invention is that the corbel is an I-beam, including a pair of wing plates arranged in parallel up and down and a web connecting the pair of wing plates, and at least one stiffening plate for reinforcing the I-beam is provided between the pair of wing plates, one side of the stiffening plate is vertically fixed to the web, the upper and lower ends of the stiffening plate are fixed to the pair of wing plates, and the steel sleeve is fixed to the upper surface of the upper wing plate and the lower surface of the lower wing plate.

[0006] A further improvement of the present invention is that the lap plate is fixed to the connecting plate by welding.

[0007] The present invention provides a construction method for a frame connection node embedded in a core tube shear wall, comprising the following steps:

[0008] S1, fixing the first end of the corbel to the surface of the inner steel plate of the core tube, and fixing the connecting plate to the second end of the corbel;

[0009] S2, placing the side template close to the second surface of the connecting plate;

[0010] S3, lap plates are fixedly arranged on both sides of the connection plate, and a row of shear wall outer horizontal reinforcements extending horizontally outwards are arranged on a side of each lap plate close to the side formwork, and a first gap is reserved between the shear wall outer horizontal reinforcements and the side formwork;

[0011] S4. The shear wall longitudinal reinforcement is fixedly inserted into the reinforcement sleeves on the upper and lower surfaces of the corbel. The shear wall longitudinal reinforcement closest to the side formwork starts from the corresponding reinforcement sleeve, first tilts toward the side formwork until the distance from the side formwork is the designed thickness of the longitudinal reinforcement protective layer, and then continues to extend in the vertical direction. A second gap is reserved between the shear wall longitudinal reinforcement closest to the side formwork and the side formwork.

[0012] A further improvement of the present invention is that after step S4, it further comprises the steps of:

[0013] S5, setting side formwork around the edge between the inner steel plate of the core tube and the side formwork to form a shear wall casting space;

[0014] S6, pouring concrete into the shear wall pouring space to form a shear wall, and pouring the first gap to form a horizontal reinforcement protection layer, and pouring the second gap to form a longitudinal reinforcement protection layer;

[0015] S7. After the concrete is formed, the side formwork and the edge formwork are removed, and the frame is fixed to the second surface of the connecting plate.

[0016] The present invention arranges the outer horizontal reinforcement of the shear wall on the lap plate instead of directly setting it on the corbel in the prior art to reduce the thickness of the horizontal reinforcement protective layer; and bends the outermost longitudinal reinforcement outward to reduce the thickness of the longitudinal reinforcement protective layer, so as to solve the problem in the prior art that the thickness of the horizontal reinforcement protective layer and the longitudinal reinforcement protective layer are too large and cracks are easily generated due to the conflict between the position of the connecting plate and the horizontal reinforcement and the longitudinal reinforcement sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the connection node of the present invention;

[0018] Figure 2 A side view of a connection node of the present invention;

[0019] Figure 3 It is a top view of the connection node of the present invention.

[0020] In the figure: 1. Steel sleeve; 2. Wing plate; 3. Connection plate; 4. Lap plate; 5. Shear wall inner longitudinal reinforcement; 6. Shear wall outer longitudinal reinforcement; 7. Shear wall outer horizontal reinforcement; 8. Web plate; 9. Stiffening plate; 10. Core tube internal steel plate; DETAILED DESCRIPTION

[0021] like Figure 1 to Figure 3 As shown, a frame connection node embedded in the core tube shear wall, the core tube shear wall is cast outside the steel plate 10 built into the core tube, including: a corbel embedded in the core tube shear wall, the first end of the corbel is fixed to the surface of the steel plate 10 built into the core tube; a connecting plate 3, the first surface of the connecting plate 3 is fixed to the second end of the corbel, and the second surface is used for fixed connection with the frame; a side formwork, the side formwork is detachably attached to the second surface of the connecting plate 3; a pair of lap plates 4, fixed on opposite sides of the connecting plate 3; two rows of shear wall outer side horizontal ribs 7, respectively fixed on one side of the two lap plates 4 close to the side formwork, and respectively horizontally connected along the two lap plates 4 relative to the outside. Extension, a first gap is reserved between the two rows of outer horizontal reinforcements 7 of the shear wall and the side formwork to form a horizontal reinforcement protection layer; at least one row of steel sleeves 1 arranged in a direction parallel to the side formwork are fixed to the upper and lower surfaces of the corbel, and each steel sleeve 1 is fixed with a shear wall longitudinal reinforcement extending in the vertical direction. The shear wall longitudinal reinforcement closest to the side formwork, that is, the outer longitudinal reinforcement 6 of the shear wall, starts from the corresponding steel sleeve, first inclines in the direction of the side formwork to a distance from the side formwork that is the designed thickness of the longitudinal reinforcement protection layer, and then continues to extend in the vertical direction, so that a reduced second gap is reserved between the outer longitudinal reinforcement 6 of the shear wall and the side formwork to form a longitudinal reinforcement protection layer.

[0022] like Figure 2 As shown, in this embodiment, the shear wall longitudinal reinforcement includes an outermost row of shear wall outer longitudinal reinforcements 6 and an inner row of shear wall inner longitudinal reinforcements 5.

[0023] like Figure 2 As shown, in this embodiment, a side of the lap plate 4 away from the side formwork is flush with the connection surface of the connecting plate 3 and the corbel.

[0024] like Figure 2 As shown, in this embodiment, the outer longitudinal reinforcement 6 of the steel corbel is bent at a ratio of 1:6 to form a bent end.

[0025] like Figure 2 As shown, in this embodiment, the corbel is an I-beam, including a pair of wing plates 2 arranged in the horizontal direction and parallel to each other and a web 8 connecting the pair of wing plates 2, and at least one stiffening plate 9 for reinforcing the I-beam is also provided between the pair of wing plates 2, one side of the stiffening plate 9 is vertically fixed to the web, and the upper and lower ends of the stiffening plate 9 are fixed to the pair of wing plates, and the steel sleeve 1 is fixed to the upper surface of the upper wing plate 2 and the lower surface of the lower wing plate.

[0026] like Figure 2 As shown, in this embodiment, three stiffening plates 9 are provided on one side, and the overall structure is further reinforced by providing multiple stiffening plates 9.

[0027] like Figure 1 to Figure 3 European style, in this embodiment, the lap plate 4 is welded and fixed to the connecting plate 3.

[0028] like Figure 1 to Figure 3 As shown, the construction method of the frame connection node embedded in the core tube shear wall includes the following steps:

[0029] S1, fix the first end of the corbel to the surface of the inner steel plate 10 of the core tube, and fix the connecting plate 3 on the second end of the corbel;

[0030] S2, placing the side template close to the second surface of the connecting plate 3;

[0031] S3, lap plates 4 are fixedly arranged on both sides of the connection plate 3, and a row of shear wall outer horizontal ribs 7 extending horizontally relatively outward are arranged on a side of each lap plate 4 close to the side formwork, and a first gap is reserved between the shear wall outer horizontal ribs 7 and the side formwork;

[0032] S4. The outer longitudinal reinforcement 6 of the shear wall starts from the corresponding steel sleeve 1, first tilts toward the side formwork until the distance from the side formwork is the designed thickness of the longitudinal reinforcement protection layer, and then continues to extend in the vertical direction. A second gap is reserved between the outer longitudinal reinforcement 6 of the shear wall and the side formwork.

[0033] In this embodiment, after step S4, the following steps are further included:

[0034] S5. A side formwork is arranged around the edge between the inner steel plate 10 of the core tube and the side formwork to form a shear wall casting space;

[0035] S6, pouring concrete into the shear wall pouring space to form a shear wall, and the first gap is poured to form a horizontal reinforcement protection layer, and the second gap is poured to form a longitudinal reinforcement protection layer;

[0036] S7. After the concrete is formed, the side formwork and the edge formwork are removed, and the frame is fixed to the second surface of the connecting plate.

[0037] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A frame connection node embedded in the core tube shear wall, wherein the core tube shear wall is cast outside the core tube built-in steel plate, characterized in that: include: A corbel embedded in the core tube shear wall, wherein the first end of the corbel is fixed to the surface of the steel plate built into the core tube; a connecting plate, wherein the first surface of the connecting plate is fixed to the second end of the corbel, and the second surface is used for fixed connection with the frame; a side formwork, wherein the side formwork is detachably attached to the second surface of the connecting plate; a pair of lap plates, fixed to opposite sides of the connecting plate; two rows of shear wall outer horizontal ribs, respectively fixed to one side of the two lap plates close to the side formwork, and respectively extending horizontally outward along the two lap plates, and the two rows of shear wall outer horizontal ribs are connected to the side formwork. A first gap is reserved between the two sides to form a horizontal reinforcement protection layer; at least one row of steel sleeves arranged in a direction parallel to the side formwork are respectively fixed to the upper and lower surfaces of the corbel, and each of the steel sleeves is fixed with a shear wall longitudinal reinforcement extending in a vertical direction. The shear wall longitudinal reinforcement closest to the side formwork starts from the corresponding steel sleeve, first tilts toward the side formwork to a distance from the side formwork that is the designed thickness of the longitudinal reinforcement protection layer, and then continues to extend in the vertical direction, so that a second reduced gap is reserved between the shear wall longitudinal reinforcement closest to the side formwork and the side formwork to form a longitudinal reinforcement protection layer.

2. The frame connection node embedded in the core tube shear wall according to claim 1, characterized in that: The corbel is an I-beam, comprising a pair of wing plates arranged in parallel up and down and a web connecting the pair of wing plates, at least one stiffening plate for reinforcing the I-beam is provided between the pair of wing plates, one side of the stiffening plate is vertically fixed to the web, the upper and lower ends of the stiffening plate are fixed to the pair of wing plates, and the steel sleeve is fixed to the upper surface of the upper wing plate and the lower surface of the lower wing plate.

3. The frame connection node embedded in the core tube shear wall according to claim 1, characterized in that: The lap plate is welded and fixed to the connecting plate.

4. A construction method for the frame connection node embedded in the core tube shear wall according to claim 1, characterized in that: The following steps are involved: S1, fixing the first end of the corbel to the surface of the inner steel plate of the core tube, and fixing the connecting plate to the second end of the corbel; S2, placing the side template close to the second surface of the connecting plate; S3, lap plates are fixedly arranged on both sides of the connection plate, and a row of shear wall outer horizontal reinforcements extending horizontally outwards are arranged on a side of each lap plate close to the side formwork, and a first gap is reserved between the shear wall outer horizontal reinforcements and the side formwork; S4. The shear wall longitudinal reinforcement is fixedly inserted into the reinforcement sleeves on the upper and lower surfaces of the corbel. The shear wall longitudinal reinforcement on the side closest to the side formwork starts from the corresponding reinforcement sleeve and first tilts toward the side formwork until the distance from the side formwork is the designed thickness of the longitudinal reinforcement protective layer, and then continues to extend in the vertical direction, so that a second reduced gap is reserved between the shear wall longitudinal reinforcement on the side closest to the side formwork and the side formwork.

5. The construction method of the frame connection node embedded in the core tube shear wall according to claim 4, characterized in that: After step S4, the method further comprises the following steps: S5, setting side formwork around the edge between the inner steel plate of the core tube and the side formwork to form a shear wall casting space; S6, pouring concrete into the shear wall pouring space to form a shear wall, and pouring the first gap to form a horizontal reinforcement protection layer, and pouring the second gap to form a longitudinal reinforcement protection layer; S7. After the concrete is formed, the side formwork and the edge formwork are removed, and the frame is fixed to the second surface of the connecting plate.

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