Connecting structure for two adjacent frame beams after middle shear wall support is knocked out

Abstract

The utility model discloses a connecting structure for two adjacent frame beams after a middle shear wall support is knocked out. The connecting structure comprises longitudinal steel bars, stirrups and a concrete layer. The longitudinal reinforcing steel bars comprise connecting top reinforcing steel bars, connecting bottom reinforcing steel bars and connecting waist reinforcing steel bars, the two ends of the connecting top reinforcing steel bars are fixedly connected with beam surface reinforcing steel bars of the two frame beams respectively, the two ends of the connecting bottom reinforcing steel bars are fixedly connected with beam bottom reinforcing steel bars of the two frame beams respectively, and the two ends of the connecting waist reinforcing steel bars are fixedly connected with beam waist reinforcing steel bars of the two frame beams respectively. The stirrups are arranged on the peripheries of the connecting top bars, the connecting bottom bars and the connecting waist bars and fixed to the connecting top bars, the connecting bottom bars and the connecting waist bars, and the concrete layer wraps the longitudinal steel bars and the stirrups. The connecting structure has the advantages that the frame beams at the two ends are lengthened and pulled through through the connecting structure, the working face is controlled within the range of an original shear wall needing to be knocked out, and therefore the knockout amount of the frame beams at the two ends and the follow-up recovery construction amount are reduced, structural stress is direct and reasonable, construction is convenient, old materials are effectively utilized, and materials can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction, in particular to a connection structure of two adjacent frame beams after a middle shear wall support is knocked out. Background Art

[0002] In recent years, with the market’s maturity and gradual saturation, new real estate projects increasingly need to take into account the residents’ high-quality demands for residential units and the overall living environment, as well as the trend of the housing market. Therefore, even if the project is in the construction stage, there are still many factors that lead to changes in the unit type. At this time, for the design, how to achieve the economical “reuse of the old and new” and the rationalization of the renovation plan for the constructed part is the key to the structural renovation design of the entire project.

[0003] An existing application scenario: the renovation design template of knocking out the middle shear wall support and extending the frame beams at both ends. After the shear wall is knocked out, frame beams at both ends will be formed. The beam surface reinforcement, beam waist reinforcement and beam bottom reinforcement extend from the opposite sides of the two frame beams. In the renovation position of the first basement floor, there was a short-legged shear wall of the original main building between the two adjacent frame beams. Due to the modification of the upper apartment type, there is no shear wall above this position. Therefore, the shear wall on the first basement floor needs to be knocked out for building use reasons. The traditional renovation method usually completely removes the original shear wall and the adjacent connected frame beams, and then reconstructs the entire frame beam to form a frame beam structure. The traditional renovation method requires a large amount of knocking out and reinforcement, and the construction cost is high, which needs to be improved. Utility Model Content

[0004] The utility model aims to provide a connection structure of two adjacent frame beams after the intermediate shear wall support is knocked out, which is convenient for construction and reasonable in force.

[0005] The utility model proposes a connection structure of two adjacent frame beams after the middle shear wall support is knocked out, comprising longitudinal steel bars, stirrups and a concrete layer; the longitudinal steel bars comprise connecting top bars, connecting bottom bars and connecting waist bars, the two ends of the connecting top bars are respectively connected and fixed to the beam surface bars of the two frame beams, the two ends of the connecting bottom bars are respectively connected and fixed to the beam bottom bars of the two frame beams, the two ends of the connecting waist bars are respectively fixed and connected to the beam waist bars of the two frame beams, the stirrups are arranged on the peripheries of the connecting top bars, the connecting bottom bars and the connecting waist bars and are fixed to each other, and the concrete layer wraps the longitudinal steel bars and stirrups.

[0006] Preferably, the diameter of the connecting top reinforcement is larger than the diameter of the beam surface reinforcements of the two frame beams.

[0007] Preferably, the two ends of the connecting top reinforcement are respectively fixed to the beam surface reinforcements of the two frame beams by single-sided welding or double-sided welding, the diameter of the connecting top reinforcement is set to d, the welding length of the connecting top reinforcement by single-sided welding is 10d, and the welding length of the connecting top reinforcement by double-sided welding is 5d.

[0008] Preferably, a plurality of indentations formed by roughening are provided on the facing surfaces of the two frame beams.

[0009] Preferably, the spacing dimension between two adjacent stirrups is L, and satisfies L=100mm.

[0010] Preferably, stirrups are provided inside the two frame beams, the number of stirrups is the same as the larger number of stirrups in the two frame beams, and the diameter of the stirrups is the same as the larger diameter of the stirrups in the two frame beams.

[0011] Preferably, two adjacent longitudinal steel bars are staggered with each other.

[0012] Preferably, the percentage of longitudinal steel bar joints in the same vertical section of the connection structure is not greater than 25%.

[0013] From the above description of the utility model, it can be seen that the utility model has the following beneficial effects:

[0014] 1. The utility model is connected on the two frame beams after knocking out the middle shear wall support. The frame beams at both ends are extended and pulled through by the utility connection structure, so that the structure is directly and reasonably stressed. It has the advantages of convenient construction, effective reuse, and material saving, and can be applied to the field of building renovation technology.

[0015] 2. Several indentations are formed on the facing sides of the two frame beams after roughening. After the connection structure is cast, the bonding strength between the two sides of the connection structure and the left and right beams is improved, making the connection structure of the extended frame beams at both ends more solid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the positions of the left beam, the right beam and the connection structure of the embodiment;

[0017] Figure 2 It is a schematic diagram of the overall structure of the connection structure of two adjacent frame beams in the embodiment after the middle shear wall support is knocked out;

[0018] Figure 3 is a schematic structural diagram of a left beam and a right beam of an embodiment;

[0019] Figure 4 It is a schematic diagram of the structure of the longitudinal reinforcement and stirrups of the embodiment.

[0020] Figure numerals: 1. frame beam; 11. beam surface reinforcement; 12. beam waist reinforcement; 13. beam bottom reinforcement; 14. indentation; 15. stirrups in beam; 3. connection structure; 31. longitudinal reinforcement; 311. connecting top reinforcement; 312. connecting waist reinforcement; 313. connecting bottom reinforcement; 32. stirrups; 33. concrete layer. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-4 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] Reference Figure 1 , Figure 2 and Figure 3 , the connection structure after the middle shear wall support is knocked out of the two adjacent frame beams, the concrete within the original middle shear wall beam height range is knocked out, the steel bars within the original middle shear wall beam height range are retained, and the original old shear wall below the beam height range is demolished. After demolition, the frame beams 1 on both sides are formed, and the frame beams 1 on both sides are temporarily supported. The beam surface reinforcement 11, beam waist reinforcement 12 and beam bottom reinforcement 13 are extended from the opposite sides of the two frame beams 1. The surfaces facing the two frame beams 1 are roughened to form a dent 14, and a connection structure 3 is provided between the two frame beams 1. After the roughening treatment, the two frame beams 1 and the connection structure 3 have a higher connection strength. This reinforcement method controls the working surface within the range of the original shear wall to be knocked out, thereby reducing the amount of knocking out of the left and right frame beams 1 and the subsequent restoration construction, and has the advantages of convenient construction, effective reuse, material saving, and reasonable force.

[0023] The connection structure 3 includes a plurality of longitudinal steel bars 31, a plurality of stirrups 32 and a concrete layer 33, wherein the longitudinal steel bars 31 include a plurality of connecting top bars 311, a plurality of connecting waist bars 312 and a plurality of connecting bottom bars 313; the two ends of the connecting top bars 311 are respectively welded and fixed to the beam surface bars 11 of the two frame beams 1, the two ends of the connecting waist bars 312 are respectively welded and fixed to the beam waist bars 12 of the two frame beams 1, and the two ends of the connecting bottom bars 313 are respectively welded and fixed to the beam bottom bars 13 of the two frame beams 1; wherein the diameter of the connecting top bars 311 is greater than the diameter of the beam surface bars 11 of the two frame beams 1 , the two ends of the connecting top reinforcement 311 are respectively connected to the beam surface reinforcement 11 of the two frame beams 1 by single-sided welding or double-sided welding. When the two ends of the connecting top reinforcement 311 are connected by single-sided welding, the welding length between the connecting top reinforcement 311 and the beam surface reinforcement 11 of the two frame beams 1 is 10d. When the two ends of the connecting top reinforcement 311 are connected by double-sided welding, the welding length between the connecting top reinforcement 311 and the beam surface reinforcement 11 of the two frame beams 1 is 5d, so as to ensure that the connecting top reinforcement 311 is firmly fixed to the beam surface reinforcement 11 of the two frame beams 1, and ensure that the concrete grade of the connecting structure 3 is not lower than the concrete grade of the two frame beams 1.

[0024] Reference Figure 2 and Figure 4 , stirrups 32 are set on the periphery of the longitudinal steel bars 31, and the stirrups 32 are tied and fixed with the connecting top bars 311, the connecting waist bars 312 and the connecting bottom bars 313. The two frame beams 1 are provided with internal stirrups 15 in the beams, and the internal stirrups 15 in the beams are fixed with the beam surface bars 11, the beam waist bars 12 and the beam bottom bars 13. The number of limbs of the internal stirrups 32 in the connection structure 3 is the same as the number of internal stirrups 15 in the beams with more limbs in the two frame beams 1, and the diameter size of the internal stirrups 32 in the connection structure 3 is the same as the larger diameter size of the internal stirrups 15 in the beams of the two frame beams 1, so that the formed connection structure 3 has a higher structural strength; the stirrups of each connection structure 3 are evenly distributed along the length direction of the longitudinal steel bars 31, and the spacing size between the two adjacent connection structure 3 stirrups is kept at L, and L=100mm is satisfied, so that the longitudinal steel bars 31 are evenly fixed in the length direction by the stirrups of the connection structure 3.

[0025] Each longitudinal steel bar 31 is divided into several layers from the top to the bottom of the beam, with the top being the connecting top steel bar 311, the middle several layers being the connecting waist steel bars 312, and the bottom being the connecting bottom steel bars 313. The adjacent longitudinal steel bars 31 in the connection structure 3 are staggered, and the joint area percentage of the longitudinal steel bars 31 in the same vertical section in the connection structure 3 is not greater than 25%, so as to avoid a large number of longitudinal steel bars 31 from overlapping on the same vertical surface in the connection structure 3, thereby causing the problem of insufficient structural strength of the connection structure 3 at the longitudinal steel bars 31.

[0026] The specific implementation principle of the embodiment of the present application is: there is a short-leg shear wall of the original main building in the middle of the original two adjacent frame beams. When the house type needs to be modified, the short-leg shear wall in the middle of the original two adjacent frame beams is demolished to form two frame beams 1, the two frame beams 1 formed are supported, and the surfaces of the opposite sides of the two frame beams 1 are roughened to form a dent 14, and a connecting structure 3 is arranged between the two frame beams 1. The connecting structure 3 is provided with longitudinal steel bars 31 and stirrups 32, and the longitudinal steel bars 31 include connecting top bars 311, connecting waist bars 312 and connecting bottom bars 313.

[0027] First, the two ends of the connecting top reinforcement 311 in the connecting structure 3 are respectively welded and fixed to the beam surface reinforcement 11 of the two frame beams 1, the two ends of the connecting waist reinforcement 312 are respectively welded and fixed to the beam waist reinforcement 12 of the two frame beams 1, and the two ends of the connecting bottom reinforcement 313 are respectively welded and fixed to the beam bottom reinforcement 13 of the two frame beams 1, and the diameter size of the connecting top reinforcement 311 is ensured to be the same as the larger diameter size of the beam surface reinforcement 11 in the two frame beams 1; the diameter size of the connecting top reinforcement 311 is set to d, when the two ends of the connecting top reinforcement 311 are respectively welded to the beam surface reinforcement 11 of the two frame beams 1 by single-sided welding, the welding length of the connecting top reinforcement 311 is ensured to be 10d; when the two ends of the connecting top reinforcement 311 are respectively welded to the beam surface reinforcement 11 of the two frame beams 1 by double-sided welding, the welding length of the connecting top reinforcement 311 is ensured to be 5d; and the adjacent two longitudinal reinforcements 31 are staggered to ensure that the joint area percentage of the longitudinal reinforcement 31 in the connecting structure 3 of the same vertical section is not greater than 25%.

[0028] The stirrups 32 in the connection structure 3 are hooped around the connection top reinforcement 311, the connection waist reinforcement 312 and the connection bottom reinforcement 313, and are tied and fixed with the connection top reinforcement 311, the connection waist reinforcement 312 and the connection bottom reinforcement 313 respectively. The diameter of the stirrups 32 in the connection structure 3 is the same as the larger diameter of the stirrups 15 in the middle beams of the two frame beams 1, and the number of stirrups 32 in the connection structure 3 is the same as the larger number of stirrups 15 in the middle beams of the two frame beams 1; the stirrups 32 in several connection structures 3 are evenly distributed along the length direction of the longitudinal steel bars 31, and the spacing between the stirrups of two adjacent connection structures 3 is maintained at 100 mm. Finally, the connection top reinforcement 311, the connection waist reinforcement 312, the connection bottom reinforcement 313 and the stirrups of the connection structure 3 are poured with concrete to form the connection structure 3, thereby completing the building renovation.

[0029] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all protected by the utility model.

Claims

1. The connection structure of two adjacent frame beams after removing the middle shear wall support is characterized by: It includes longitudinal steel bars, stirrups and a concrete layer; the longitudinal steel bars include connecting top bars, connecting bottom bars and connecting waist bars, the two ends of the connecting top bars are respectively connected and fixed to the beam surface bars of the two frame beams, the two ends of the connecting bottom bars are respectively connected and fixed to the beam bottom bars of the two frame beams, the two ends of the connecting waist bars are respectively fixed and connected to the beam waist bars of the two frame beams, the stirrups are arranged on the periphery of the connecting top bars, connecting bottom bars and connecting waist bars and fixed to each other, and the concrete layer wraps the longitudinal steel bars and stirrups.

2. The connection structure of two adjacent frame beams after removing the intermediate shear wall support according to claim 1 is characterized in that: The diameter of the connecting top reinforcement is greater than the diameter of the beam surface reinforcement of the two frame beams.

3. The connection structure of two adjacent frame beams after removing the intermediate shear wall support according to claim 1 is characterized in that: The two ends of the connecting top reinforcement are fixed to the beam surface reinforcement of the two frame beams by single-sided welding or double-sided welding. The diameter of the connecting top reinforcement is set to d. The welding length of the connecting top reinforcement for single-sided welding is 10d, and the welding length of the connecting top reinforcement for double-sided welding is 5d.

4. The connection structure of two adjacent frame beams after removing the intermediate shear wall support according to claim 1 is characterized in that: A plurality of indentations formed by roughening are arranged on the facing sides of the two frame beams.

5. The connection structure of two adjacent frame beams after removing the intermediate shear wall support according to claim 1 is characterized in that: The spacing dimension between two adjacent stirrups is L, and satisfies L=100mm.

6. The connection structure of two adjacent frame beams after removing the intermediate shear wall support according to claim 1 is characterized in that: The two frame beams are provided with internal stirrups, the number of the stirrups is the same as the larger number of internal stirrups of the two frame beams, and the diameter of the stirrups is the same as the larger diameter of the internal stirrups of the two frame beams.

7. The connection structure of two adjacent frame beams after removing the intermediate shear wall support according to claim 1 is characterized in that: The two adjacent longitudinal steel bars are staggered with each other.

8. The connection structure of two adjacent frame beams after removing the intermediate shear wall support according to claim 7 is characterized in that: The percentage of longitudinal steel bar joints within the same vertical section of the connection structure shall not exceed 25%.

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