Frame connection joint embedded in core tube shear wall and construction method thereof

Abstract

A frame connecting joint embedded in a core tube shear wall and a construction method thereof, the connecting joint comprising: a corbel, a first end of the corbel being fixed to a built-in steel plate in the core tube; a connecting plate, a first surface of the connecting plate being fixed to a second end of the corbel, and a second surface being used for fixed connection with a frame; a side formwork, the side formwork being detachably attached to the second surface of the connecting plate; a lap plate, the lap plate being fixed to both sides of the connecting plate; an outer shear wall horizontal bar, the outer shear wall horizontal bar being fixed to a side of the lap plate close to the side formwork, and a horizontal bar protection layer being reserved between the outer shear wall horizontal bar and the side formwork; and a steel sleeve being fixed to upper and lower surfaces of the corbel, and a shear wall longitudinal bar being fixed in each steel sleeve, and a non-fixed end of the outer shear wall longitudinal bar being bent towards the side formwork to reduce a longitudinal bar protection layer, the present application reduces the thickness of the horizontal bar protection layer by arranging the outer shear wall horizontal bar on the lap plate, and reduces the thickness of the longitudinal bar protection layer by bending the outermost longitudinal bar outward.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building construction, in particular to a frame connecting joint embedded in a core tube shear wall and a construction method thereof. BACKGROUND

[0002] With the vigorous development of the construction industry, the frame-core tube combined structure has become the most mainstream trend in building structures. In the existing frame-core tube combined structure system, a bracket is embedded in a shear wall, and a connecting plate is arranged at one end of the bracket to connect a frame. When the shear wall is constructed, a side formwork on one side of the wall is arranged outside the connecting plate. Since the connecting plate is thick, the space of the connecting sleeve of the horizontal reinforcement outside the shear wall and the upper and lower longitudinal reinforcement of the bracket is occupied, resulting in the conflict between the connecting plate and the sleeve of the horizontal reinforcement outside the shear wall and the longitudinal reinforcement of the shear wall, the large gap between the horizontal reinforcement outside the shear wall, the sleeve and the side formwork, and the excessively large reinforcement protective layer. The excessively large reinforcement protective layer leads to the risk of excessively wide cracks in the shear wall in the region, and affects the use performance of the structure. SUMMARY

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

[0004] The application discloses a frame connecting joint embedded in a core tube shear wall, and the core tube shear wall is poured outside a core tube built-in steel plate. The frame connecting joint embedded in the core tube shear wall comprises the following parts: a bracket embedded in the core tube shear wall, a first end of the bracket being fixed to the surface of the core tube built-in steel plate; a connecting plate, a first surface of the connecting plate being fixed to the second end of the bracket, and a second surface of the connecting plate being used for fixedly connecting with the frame; a side formwork, the side formwork being detachably attached to the second surface of the connecting plate; a pair of lap plates, the lap plates being fixed to the opposite sides of the connecting plate; two rows of horizontal reinforcements outside the shear wall, the horizontal reinforcements being fixed to one side of the two lap plates close to the side formwork and extending horizontally away from the two lap plates respectively, and a first gap being reserved between the two rows of horizontal reinforcements outside the shear wall and the side formwork to form a horizontal reinforcement protective layer; at least one row of steel reinforcement sleeves arranged on the upper and lower surfaces of the bracket in parallel to the side formwork, each steel reinforcement sleeve being fixed with a longitudinal reinforcement of the shear wall extending in the vertical direction, and the longitudinal reinforcement of the shear wall closest to the side formwork being inclined to the side formwork from the corresponding steel reinforcement sleeve, then extending in the vertical direction after the longitudinal reinforcement of the shear wall is inclined to the side formwork to a distance of the designed longitudinal reinforcement protective layer thickness, so that a reduced second gap is reserved between the longitudinal reinforcement of the shear wall closest to the side formwork and the side formwork to form a longitudinal reinforcement protective layer.

[0005] Further improvement of the present application is that the bracket is an I-shaped steel, comprising a pair of wings arranged in parallel and a web connecting the pair of wings, at least one reinforcing plate is arranged between the pair of wings for reinforcing the I-shaped steel, one side of the reinforcing plate is fixed vertically to the web, and the upper and lower ends of the reinforcing plate are fixed to the pair of wings, and the reinforcing sleeve is fixed to the upper surface of the upper wing and the lower surface of the lower wing.

[0006] Further improvement of the present application is that the lap plate is welded to the connecting plate.

[0007] The construction method of the frame connection node embedded in the core tube shear wall comprises the following steps:

[0008] S1, the first end of the bracket is fixed to the surface of the core tube embedded steel plate, and the connecting plate is fixed to the second end of the bracket;

[0009] S2, the side formwork is tightly attached to the second surface of the connecting plate;

[0010] S3, the lap plate is fixed on both sides of the connecting plate, and a row of shear wall outer horizontal bars extending outward is arranged on one side of each lap plate close to the side formwork, and a first gap is reserved between the shear wall outer horizontal bar and the side formwork;

[0011] S4, the shear wall longitudinal bars are fixed in the reinforcing sleeves on the upper and lower surfaces of the bracket, the shear wall longitudinal bar closest to the side formwork is first inclined to the side formwork from the corresponding reinforcing sleeve, and then continues to extend in the vertical direction, and a second gap is reserved between the shear wall longitudinal bar closest to the side formwork and the side formwork.

[0012] Further improvement of the present application is that after step S4, it further comprises the following steps:

[0013] S5, the edge formwork is arranged around the edge between the core tube embedded steel plate and the side formwork to form a shear wall pouring space;

[0014] S6, the concrete is poured into the shear wall pouring space to form a shear wall, the first gap is poured to form a horizontal bar protection layer, and the second gap is poured to form a longitudinal bar 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] This invention addresses the problem in the prior art where the horizontal reinforcement bars on the outer side of the shear wall are placed on the lap plate instead of being directly placed on the corbel, thereby reducing the thickness of the protective layer for the horizontal reinforcement bars. It also solves the problem in the prior art where the thickness of the protective layer for the horizontal and longitudinal reinforcement bars is too large and prone to cracking due to the conflict between the position of the connecting plate and the sleeves of the horizontal and longitudinal reinforcement bars. Attached Figure Description

[0017] Fig. 1 This is the main view of the connection node of the present invention;

[0018] Fig. 2 This is a side view of the connection node of the present invention;

[0019] Fig. 3 This is a top view of the connection node of the present invention.

[0020] In the diagram: 1. Rebar sleeve; 2. Wing plate; 3. Connecting plate; 4. Lap plate; 5. Inner longitudinal reinforcement of shear wall; 6. Outer longitudinal reinforcement of shear wall; 7. Outer horizontal reinforcement of shear wall; 8. Web plate; 9. Stiffening plate; 10. Core tube internal steel plate; Detailed Implementation

[0021] like Figs. 1-3 As shown, a frame connection node pre-embedded inside a core tube shear wall, the core tube shear wall being cast outside the core tube's internal steel plate 10, includes: a corbel pre-embedded inside the core tube shear wall, the first end of the corbel being fixed to the surface of the core tube's internal steel plate 10; a connecting plate 3, the first surface of which is fixed to the second end of the corbel, and the second surface being used for fixed connection with the frame; a side formwork, the side formwork being detachably attached to the second surface of the connecting plate 3; a pair of lap plates 4, fixed to opposite sides of the connecting plate 3; and two rows of horizontal reinforcement bars 7 on the outer side of the shear wall, respectively fixed to the side of the two lap plates 4 near the side formwork, and respectively extending horizontally outwards from opposite sides along the two lap plates 4. Extending, a first gap is reserved between the two rows of horizontal reinforcement bars 7 on the outer side of the shear wall and the side formwork to form a protective layer for the horizontal reinforcement bars; at least one row of steel sleeves 1 arranged parallel to the side formwork is fixed on the upper and lower surfaces of the corbel. Each steel sleeve 1 is fixed with a vertically extending longitudinal reinforcement bar of the shear wall. The longitudinal reinforcement bar of the shear wall closest to the side formwork, that is, the outer longitudinal reinforcement bar 6 of the shear wall, starts from the corresponding steel sleeve, first inclines towards the side formwork to a distance from the side formwork that is the designed thickness of the longitudinal reinforcement protective layer, and then continues to extend vertically so that a reduced second gap is reserved between the outer longitudinal reinforcement bar 6 of the shear wall and the side formwork to form a longitudinal reinforcement protective layer.

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

[0023] As shown in the drawings, Fig. 2 In this embodiment, the side of the lap plate 4 away from the side formwork is attached to the connecting surface of the connecting plate 3 and the corbel.

[0024] As shown in the drawings, Fig. 2 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] As shown in the drawings, Fig. 2 In this embodiment, the corbel is an I-beam, including a pair of wings 2 arranged in the horizontal direction and parallel to each other, and a web plate 8 connecting the pair of wings 2. At least one stiffening plate 9 for reinforcing the I-beam is arranged between the pair of wings 2. One side of the stiffening plate 9 is fixed vertically to the web plate, and the upper and lower ends of the stiffening plate 9 are fixed to the pair of wings. The reinforcing sleeve 1 is fixed to the upper surface of the upper wing plate 2 and the lower surface of the lower wing plate.

[0026] As shown in the drawings, Fig. 2 In this embodiment, three stiffening plates 9 are arranged on one side to further reinforce the overall structure.

[0027] As shown in the drawings, Figs. 1-3 European style, in this embodiment, the lap plate 4 is welded and fixed to the connecting plate 3.

[0028] As shown in the drawings, Figs. 1-3 The construction method of the frame connection joint embedded in the core wall shear wall includes the following steps:

[0029] S1, the first end of the corbel is fixed to the surface of the core wall embedded steel plate 10, and the connecting plate 3 is fixed to the second end of the corbel;

[0030] S2, the side formwork is tightly attached to the second surface of the connecting plate 3;

[0031] S3, the lap plate 4 is fixed on both sides of the connecting plate 3, and a row of outwardly extending horizontal shear wall outer longitudinal reinforcement 7 is arranged on one side of each lap plate 4 close to the side formwork. A first gap is reserved between the horizontal shear wall outer longitudinal reinforcement 7 and the side formwork.

[0032] S4, the shear wall outer longitudinal reinforcement 6 is inclined from the corresponding reinforcing sleeve 1 to the side formwork, and then continues to extend in the vertical direction after reaching a design longitudinal reinforcement protection layer thickness from the side formwork. A second gap is reserved between the shear wall outer longitudinal reinforcement 6 and the side formwork.

[0033] In this embodiment, after step S4, it further includes the following steps:

[0034] S5, a side formwork is arranged around the edge between the core wall embedded steel plate 10 and the side formwork to form a shear wall pouring space;

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

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

[0037] Finally, it should be noted that: the above is only the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A frame connection node pre-embedded inside a core tube shear wall, wherein the core tube shear wall is cast outside the internal steel plate of the core tube, characterized in that, include: A corbel embedded in the core tube shear wall, the first end of the corbel being fixed to the surface of the steel plate inside the core tube; a connecting plate, the first side of which is fixed to the second end of the corbel, the second side being used for fixed connection with the frame; a side formwork, the side formwork being detachably attached to the second side of the connecting plate; a pair of overlapping plates, fixed to opposite sides of the connecting plate; two rows of horizontal reinforcement bars on the outer side of the shear wall, respectively fixed to the side of the two overlapping plates near the side formwork, and extending horizontally outward relative to each other along the two overlapping plates, the two rows of horizontal reinforcement bars on the outer side of the shear wall being connected to the side formwork. A first gap is reserved between the two sections to form a horizontal reinforcement protective layer. At least one row of steel sleeves arranged parallel to the side formwork is fixed on the upper and lower surfaces of the corbel. Each steel sleeve is fixed with a shear wall longitudinal reinforcement extending vertically. The shear wall longitudinal reinforcement closest to the side formwork first inclines towards the side formwork from the corresponding steel sleeve until the distance from the side formwork is the designed longitudinal reinforcement protective layer thickness, and then continues to extend vertically, so that a reduced second gap is reserved between the shear wall longitudinal reinforcement closest to the side formwork and the side formwork to form a longitudinal reinforcement protective layer.

2. The frame connection node pre-embedded inside the core tube shear wall as described in claim 1, characterized in that, The corbel is an I-beam, comprising a pair of parallel flanges and a web connecting the pair of flanges. At least one stiffening plate for reinforcing the I-beam is provided between the pair of flanges. One side of the stiffening plate is vertically fixed to the web, and the upper and lower ends of the stiffening plate are fixed to the pair of flanges. The reinforcing bar sleeve is fixed to the upper surface of the upper flange and the lower surface of the lower flange.

3. The frame connection node pre-embedded inside the core tube shear wall as described in claim 1, characterized in that, The lap plate is welded and fixed to the connecting plate.

4. A construction method for a frame connection node pre-embedded inside the core tube shear wall as described in claim 1, characterized in that, Includes the following steps: S1. Fix the first end of the corbel to the surface of the steel plate inside the core tube, and fix the connecting plate to the second end of the corbel; S2. Place the side template tightly against the second surface of the connecting plate; S3. An overlapping plate is fixedly installed on both sides of the connecting plate, and a row of horizontally extending shear wall reinforcement bars are provided on the side of each overlapping plate near the side template. A first gap is reserved between the horizontally extending shear wall reinforcement bars and the side template. S4. Shear wall longitudinal reinforcement bars are fixedly inserted into the steel sleeves on the upper and lower surfaces of the corbel. The shear wall longitudinal reinforcement bar closest to the side formwork starts from the corresponding steel sleeve, first tilts towards the side formwork until the distance from the side formwork is the designed longitudinal reinforcement protective layer thickness, and then continues to extend in the vertical direction, so that a reduced second gap is reserved between the shear wall longitudinal reinforcement bar closest to the side formwork and the side formwork.

5. The construction method for the frame connection node pre-embedded inside the core tube shear wall as described in claim 4, characterized in that, Following step S4, the following steps are also included: S5. An edge formwork is installed at the edge between the steel plate inside the core tube and the side formwork to form a shear wall casting space; S6. Concrete is poured into the shear wall pouring space to form a shear wall, and a horizontal reinforcement protective layer is poured into the first gap, and a longitudinal reinforcement protective layer is poured into the second gap. S7. After the concrete has solidified, remove the side formwork and the edge formwork, and fix the frame to the second surface of the connecting plate.

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