Connecting structure of modular building beam-wall joint with dense steel bars

Abstract

This invention discloses a connection structure for beam-wall joints with dense reinforcement in modular buildings. The modular building includes precast beams and precast shear walls. Vertical steel components are embedded within the precast shear walls. The load-bearing components of the precast beams are anchored into the precast shear walls. Auxiliary connectors are installed at locations where the load-bearing components of the beams intersect with the longitudinal reinforcement of the shear walls. Each auxiliary connector has a through hole in its center and reinforcement connection structures on opposite sides. Comparing the load-bearing components of the beams with the longitudinal reinforcement of the shear walls, the reinforcement with greater stress is kept intact and passes through the through hole of the auxiliary connector, while the reinforcement with less stress is cut off and fixedly connected to the reinforcement connection structures on both sides of the auxiliary connector. The side of the steel component has a notch corresponding to the position of the load-bearing component of the beam. The portion of the load-bearing component anchored into the precast shear wall passes through the notch, and the load-bearing component is welded to the steel component. This invention allows for the anchoring of load-bearing components of the beams even when the reinforcement at the ends of the precast shear walls is dense.

Description

Technical Field

[0001] This invention belongs to the field of modular building technology, and specifically relates to a connection structure for beam-wall joints in modular buildings when there is dense reinforcement. Background Technology

[0002] Modular buildings, with their prefabricated modules in factories, allow for rapid and precise on-site installation using large hoisting equipment, reducing on-site workload. Compared to traditional building structures, modular buildings significantly shorten construction time, and factory production reduces construction waste and carbon emissions. Furthermore, with the development of digital and intelligent technologies, modular buildings can be managed throughout their entire lifecycle.

[0003] In modular buildings, existing technologies, to ensure reliable connection between upper and lower precast shear walls, involve creating vertical assembly holes within the precast shear walls and installing connecting reinforcing bars. The ends of these connecting bars are then inserted into the assembly holes of the upper and lower precast shear walls, thus achieving the connection. A specific example is the high-rise prefabricated single-row through-hole precast shear wall and its assembly structure disclosed in Chinese Patent No. ZL201720862795.6. To form the vertical assembly holes within the precast shear walls, steel components with through holes in the center need to be embedded at corresponding positions. These steel components can be steel pipes, structural steel sections, or lattice-type components, etc.

[0004] However, when connecting precast beams to precast shear walls with vertical assembly holes, it is often difficult to anchor the reinforcing bars of the precast beams into the precast shear walls. This is because the ends of the precast shear walls themselves have dense reinforcement. When steel components such as steel pipes, steel sections, or lattice structures are installed, the space for the beam reinforcing bars at the ends of the precast shear walls becomes very small, or even nonexistent. The anchoring portion of the beam reinforcing bars interferes with the steel components and the longitudinal reinforcement of the shear wall, making it very difficult, or even impossible, to anchor the beam reinforcing bars.

[0005] Therefore, a connection structure was designed for beam-wall joints in modular buildings with dense reinforcement to help anchor the beam reinforcement. Summary of the Invention

[0006] The purpose of this invention is to provide a connection structure for beam-wall joints in modular buildings with dense reinforcement, which can still anchor the load-bearing beam members even when the reinforcement at the end of the precast shear wall is dense.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] A connection structure for beam-wall joints with dense reinforcement in a modular building. The modular building includes precast beams and precast shear walls. A vertical steel component with a through hole in the middle is embedded in one end of the precast shear wall that connects to the precast beam, forming an assembly hole. The precast beam has load-bearing members on both sides, extending from the end face of the precast beam and anchored into the precast shear wall. The precast shear wall has longitudinal reinforcement on both sides. The key feature is that when the load-bearing members intersect with the longitudinal reinforcement of the shear wall... Auxiliary connectors are installed at the location, with a through hole in the middle and steel reinforcement connection structures on opposite sides. The load-bearing beam is compared with the longitudinal reinforcement of the shear wall. The steel reinforcement with greater stress is kept intact and passes through the through hole of the auxiliary connector, while the steel reinforcement with less stress is cut off and fixedly connected to the steel reinforcement connection structures on both sides of the auxiliary connector. The side of the steel component has a cut corresponding to the position of the load-bearing beam. The part of the load-bearing beam anchored into the precast shear wall passes through the cut and is welded to the load-bearing beam.

[0009] A further technical solution of the present invention is as follows: the auxiliary connecting component is a double-sided threaded steel sleeve component, which includes a sleeve in the middle and two threaded steel sleeves respectively provided on both sides of the sleeve. The threaded steel sleeves are steel bar connection structures, the axes of the threaded steel sleeves on both sides coincide, the middle of the sleeve is a through hole, the end of the cut steel bar is provided with external threads, and the cut steel bar is threadedly connected to the threaded steel sleeve.

[0010] A further technical solution of the present invention is as follows: the auxiliary connecting member is an annular component, the middle part of the annular component is a through hole, the thickness of the annular component is greater than the diameter of the cut steel bar, and welding planes are respectively provided on opposite sides of the annular component. The welding planes are steel bar connection structures, and the cut steel bar is welded together with the welding planes.

[0011] A further technical solution of the present invention is: the ring component has four sides, of which two opposite sides are welding planes and the other two opposite sides are arc-shaped surfaces.

[0012] A further technical solution of the present invention is that the inner edge of the side wall of the steel component is flush with the inner edge of the beam load-bearing component, which can prevent large-diameter connecting steel bars from being stuck by the beam load-bearing component when inserted into the steel component.

[0013] A further technical solution of the present invention is that the inner wall of the sleeve is a smooth surface.

[0014] A further technical solution of the present invention is that the steel component is a steel pipe, a steel section, or a lattice structure.

[0015] A further technical solution of the present invention is as follows: one end of the precast shear wall connected to the precast beam is a hidden column, and the longitudinal reinforcement of the shear wall includes the longitudinal reinforcement of the hidden column and the longitudinal reinforcement of the wall body.

[0016] A further technical solution of the present invention is: the load-bearing component of the beam is a beam reinforcing bar, flat steel, angle steel, hollow steel, or steel pipe.

[0017] A further technical solution of the present invention is as follows: an internal thread is provided on the inner wall of the sleeve, and the interior of the sleeve is set to be connected or not connected. An external thread is provided on the reinforcing bar (or flat steel, angle steel, hollow steel, or steel pipe) with greater stress. For sleeves with internal connectivity, the reinforcing bar (or flat steel, angle steel, hollow steel, or steel pipe) with greater stress is not cut off, but passes through the sleeve for threaded connection. For sleeves with internal non-connection, the reinforcing bar (or flat steel, angle steel, hollow steel, or steel pipe) with greater stress is cut off and threadedly connected to the sleeve.

[0018] A further technical solution of the present invention is that the ring component has a quadrilateral shape.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) This invention provides auxiliary connectors at the locations where the beam's load-bearing components and the longitudinal reinforcement of the shear wall intersect. The larger-stressed reinforcing bars are kept intact and pass through the through-holes in the auxiliary connectors, while the smaller-stressed reinforcing bars are cut off and connected to both sides of the auxiliary connectors, thus resolving the interference problem between the beam's load-bearing components and the longitudinal reinforcement of the shear wall. Simultaneously, cuts are provided on the side of the steel component corresponding to the position of the beam's load-bearing component, allowing the beam's load-bearing component to pass through the cuts, thus resolving the interference problem between the beam's load-bearing components and the steel component. Ultimately, this solves the problem of anchoring the beam's load-bearing components when there is dense reinforcement at the beam-wall joint.

[0021] (2) The present invention sets cuts at the corresponding positions of the steel components and the beam load-bearing components to avoid interference between the steel components and the beam load-bearing components, so that the size of the steel components can be selected to be larger, and thus the assembly holes are larger. During the hoisting of the upper and lower module units, the connecting steel bars can be more easily aligned and inserted into the assembly holes, and it is easier to pour concrete into the assembly holes, and the poured concrete is more compact, ensuring reliable connection between the upper and lower module units and enhancing the structural integrity of the modular building.

[0022] (3) The present invention achieves the connection of steel bars at the intersection of the load-bearing beam and the longitudinal reinforcement of the shear wall through auxiliary connectors. The load-bearing beam can be directly anchored into the precast shear wall, ensuring a good force transmission path.

[0023] (4) The present invention enables the connection position of the longitudinal reinforcement of the shear wall and the load-bearing member of the beam to have greater stiffness through the connection of the auxiliary connector, and the wall-beam node has higher strength, which is conducive to realizing the seismic principle of "strong node and weak member".

[0024] (5) The connection structure of the present invention can be widely applied to various node connection situations with dense steel bars, and has a wide range of application scenarios. Attached Figure Description

[0025] Figure 1 This is a partial plan view of a modular building according to an embodiment of the present invention;

[0026] Figure 2 This is a detailed drawing of the connection structure at the beam-wall joint in Embodiment 1 of the present invention;

[0027] Figure 3 for Figure 2 Enlarged schematic diagram of the connection between the precast shear wall and the precast beam at one end; Figure 4 This is a structural schematic diagram of the double-sided threaded steel sleeve component according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of the structure of the double-sided threaded steel sleeve component in Embodiment 1 of the present invention when it is connected to the beam reinforcing bars and the hidden column longitudinal bars.

[0028] Figure 6 This is a detailed drawing of the connection structure at the beam-wall joint in Embodiment 2 of the present invention;

[0029] Figure 7 for Figure 6 Enlarged schematic diagram of the connection between the precast shear wall and the precast beam at one end;

[0030] Figure 8 This is a schematic diagram of the ring-shaped component according to Embodiment 3 of the present invention; Figure 9 This is a schematic diagram of the structure when the annular component is connected to the beam reinforcement and the hidden column longitudinal reinforcement in Embodiment 3 of the present invention;

[0031] Figure 10 This is a detailed drawing of the connection structure at the beam-wall joint in Embodiment 3 of the present invention;

[0032] Figure 11 for Figure 10 Enlarged schematic diagram of the connection between the precast shear wall and the precast beam at one end;

[0033] Figure 12 This is a detailed drawing of the connection structure at the beam-wall joint in Embodiment 4 of the present invention;

[0034] Figure 13 for Figure 12 An enlarged schematic diagram of one end of the precast shear wall connected to the precast beam.

[0035] Meaning of the labels in the attached diagram:

[0036] 1-Precast shear wall; 2-Precast beam; 3-Beam reinforcing bars; 4-Steel pipe; 5-Connecting reinforcing bars; 6-Double-sided threaded steel sleeve component; 7-Hidden column longitudinal reinforcement; 8-Wall longitudinal reinforcement; 9-Hidden column; 10-Wall body; 11-Horizontal reinforcement; 12-Hidden column stirrups; 13-Sleeve; 14-Welding plane; 15-Threaded steel sleeve; 16-Through hole; 17-Ring component. Detailed Implementation

[0037] The present invention will be further described below with reference to embodiments.

[0038] like Figure 1 The image shown is a partial plan view of a modular building, which is assembled from multiple modular units. Figure 1 The diagram illustrates four modular units. Module unit two and module unit three have a double-beam, double-wall structure, consisting of two parallel precast shear walls 1 and two precast beams 2. The two precast shear walls 1 are connected to the two precast beams 2 respectively. The connection structure in the following embodiment is applied at connection point A between the precast shear walls 1 and the precast beams 2. At point A, the precast shear wall 1 has very dense reinforcement and is embedded with vertical steel members with through holes in the middle to form assembly holes. At this location, the reinforcing bars 3 of the precast beam 2 need to be anchored into the precast shear wall 1.

[0039] Example 1:

[0040] like Figure 2 and Figure 3 The diagram shows the connection structure when there is dense reinforcement at the beam-wall joint in this embodiment.

[0041] In this embodiment, the end of the precast shear wall 1 connected to the precast beam 2 is a concealed column 9. The concealed column 9 contains concealed column longitudinal reinforcement 7, concealed column stirrups 12, horizontal reinforcement 11, and steel components. The concealed column longitudinal reinforcement 7 and horizontal reinforcement 11 are arranged on both sides of the concealed column 9. The steel components in this embodiment are square steel pipes 4, with square assembly holes formed within them. Connecting steel bars 5 are inserted into the assembly holes for connection between upper and lower modules. Longitudinal reinforcement 8 and horizontal reinforcement 11 are respectively provided on both sides of the wall body 10 of the precast shear wall 1.

[0042] The precast beam 2 has reinforcing bars 3 on both sides. In this embodiment, the reinforcing bars 3 are bottom bars of the beam, and their diameter is larger than that of the hidden column longitudinal bars 7 and the wall longitudinal bars 8. Their stress is also greater than that of the hidden column longitudinal bars 7 and the wall longitudinal bars 8. The reinforcing bars 3 extend from the end face of the precast beam 2 and are anchored into the precast shear wall 1. The anchoring path of the reinforcing bars 3 interferes with the hidden column longitudinal bars 7, the wall longitudinal bars 8, and both sides of the steel pipe 4.

[0043] For locations where the beam's reinforcing bars 3 intersect with the hidden column's longitudinal bars 7 and the wall's longitudinal bars 8, this embodiment provides auxiliary connectors. For example... Figure 4 As shown, the auxiliary connector in this embodiment is a double-sided threaded steel sleeve component 6. The double-sided threaded steel sleeve component 6 includes a central sleeve 13 and two threaded steel sleeves 15 respectively located on both sides of the sleeve 13. The sleeve 13 has a through hole 16 in the middle for the steel bar to pass through, and the inner wall of the sleeve 13 is a smooth surface. The threaded steel sleeve 15 is a steel bar connection structure used to connect cut steel bars. The axes of the two threaded steel sleeves 15 coincide, and the center of the threaded steel sleeve 15 is a threaded connection hole.

[0044] like Figure 5 As shown, in this embodiment, the beam reinforcing bars 3 pass through the sleeve 13 of the double-sided threaded steel sleeve component 6 to maintain continuity, while the hidden column longitudinal bars 7 and wall longitudinal bars 8 are cut off at the position where they interfere with the beam reinforcing bars 3, and external threads are provided at the ends of the cut reinforcing bars. The cut-off hidden column longitudinal bars 7 and wall longitudinal bars 8 are threaded together with the threaded steel sleeve 15.

[0045] Regarding the position where the beam reinforcement 3 interferes with the steel pipe 4, this embodiment provides a transverse cut on the side of the steel pipe 4 corresponding to the position of the beam reinforcement 3. The portion of the beam reinforcement 3 anchored into the precast shear wall 1 passes through the cut, and the beam reinforcement 3 is welded to the steel pipe 4.

[0046] In this embodiment, the inner edge of the side wall of the steel pipe 4 is flush with the inner edge of the beam reinforcing bar 3, which can prevent the large-diameter connecting steel bar 5 from being stuck by the beam reinforcing bar 3 when inserted into the steel pipe 4.

[0047] In another embodiment, when the beam reinforcement 3 anchored into the precast shear wall 1 is the beam reinforcement, the stress on the beam reinforcement is smaller than that on the longitudinal reinforcement of the shear wall. The double-sided threaded steel sleeve component 6 can be rotated 90° so that the longitudinal reinforcement of the shear wall passes through the sleeve 13 and remains continuous, while the beam reinforcement is cut off at the position where it interferes with the longitudinal reinforcement of the shear wall. The cut beam reinforcement is then threadedly connected to the threaded steel sleeve 15.

[0048] Example 2:

[0049] The difference between Example 2 and Example 1 lies in the steel component. For example... Figure 6 and Figure 7 As shown, the steel component used in this embodiment is a circular steel pipe 4, through which a circular assembly hole is formed inside the concealed column 9. Cutouts are still provided on both sides of the steel pipe 4 to allow the beam reinforcement 3 to pass through.

[0050] Example 3:

[0051] The difference between Embodiment 3 and Embodiment 1 lies in the auxiliary connecting component. For example... Figures 8 to 11As shown, the auxiliary connector in this embodiment is an annular component 17. The middle part of the annular component 17 is a through hole 16 for the reinforcing bars to pass through. The thickness of the annular component 17 is greater than the diameter of the cut longitudinal reinforcing bars of the shear wall. Welding planes 14 are provided on opposite sides of the annular component 17. The welding planes 14 are reinforcing bar connection structures used for welding with the cut reinforcing bars.

[0052] In this embodiment, during connection, the beam reinforcing bars 3 pass through the through hole 16 of the annular member 17 to maintain continuity, while the hidden column longitudinal bars 7 and the wall longitudinal bars 8 are cut off at the position where they interfere with the beam reinforcing bars 3. The cut-off bars are welded together with the welding planes 14 on both sides.

[0053] In this embodiment, the annular component 17 is made of a circular ring. During processing, the opposite sides of the circular ring are cut flat to form a welding plane 14, and the resulting annular component 17 has a drum-shaped appearance.

[0054] The two auxiliary connectors described in Embodiments 1 and 3 above can be used in combination. The structure connected by the double-sided threaded steel sleeve member 6 has greater rigidity than the structure connected by the ring member 17, but the ring member 17 is less expensive. Therefore, the choice can be made according to the stress conditions at the connection location. The double-sided threaded steel sleeve member 6 is used when the stress on the cut steel bar is relatively large, and the ring member 17 is used when the stress on the cut steel bar is relatively small.

[0055] In another embodiment, when the beam reinforcement 3 anchored into the precast shear wall 1 is the beam reinforcement, the stress on the beam reinforcement is smaller than that on the longitudinal reinforcement of the shear wall. The ring member 17 can be rotated 90° so that the longitudinal reinforcement of the shear wall passes through the through hole 16 of the ring member 17 and remains continuous, while the beam reinforcement is cut off at the position where it interferes with the longitudinal reinforcement of the shear wall. The cut beam reinforcement is then welded to the welding planes 14 on both sides of the ring member 17.

[0056] Example 4:

[0057] The difference between Example 4 and Example 3 lies in the steel component. For example... Figure 12 and Figure 13 As shown, the steel component used in this embodiment is a circular steel pipe 4, through which a circular assembly hole is formed inside the concealed column 9. Cutouts are still provided on both sides of the steel pipe 4 to allow the beam reinforcement 3 to pass through.

[0058] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention. The implementation of the present invention is not limited thereto. All other modifications, substitutions or alterations made to the above structure of the present invention based on the above content of the present invention, in accordance with ordinary technical knowledge and common practice in the field, without departing from the basic technical idea of ​​the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A connection structure for beam-wall joints with dense reinforcement in a modular building, wherein the modular building comprises precast beams and precast shear walls, wherein a vertical steel member with a through hole in the middle is embedded in one end of the precast shear wall connected to the precast beam, forming an assembly hole through the steel member, and beam load-bearing members are respectively provided on both sides of the precast beam, the beam load-bearing members extending from the end face of the precast beam and anchored into the precast shear wall, and longitudinal reinforcement bars of the shear wall are respectively provided on both sides of the precast shear wall, characterized in that: The anchorage path of the beam load-bearing member interferes with the longitudinal reinforcement of the shear wall and the two sides of the steel component. An auxiliary connector is provided at the position where the beam load-bearing member and the longitudinal reinforcement of the shear wall intersect. The auxiliary connector has a through hole in the middle and a steel reinforcement connection structure on both sides. The beam load-bearing member is compared with the longitudinal reinforcement of the shear wall. The steel reinforcement with greater stress is kept intact and passes through the through hole of the auxiliary connector. The steel reinforcement with less stress is cut off and fixedly connected to the steel reinforcement connection structure on both sides of the auxiliary connector. The side of the steel component has a cut corresponding to the position of the beam load-bearing member. The part of the beam load-bearing member that is anchored into the precast shear wall passes through the cut and the beam load-bearing member is welded to the steel component.

2. The connection structure at beam-wall joints in modular buildings according to claim 1, characterized in that: The auxiliary connector is a double-sided threaded steel sleeve component, which includes a central sleeve and two threaded steel sleeves respectively located on both sides of the sleeve. The threaded steel sleeves are the rebar connection structure, and the axes of the two threaded steel sleeves coincide. The middle of the sleeve is the through hole, and the end of the cut rebar is provided with external threads. The cut rebar is threadedly connected to the threaded steel sleeve.

3. The connection structure at beam-wall joints in modular buildings according to claim 1, characterized in that: The auxiliary connector is a ring-shaped component with a through hole in the middle. The thickness of the ring-shaped component is greater than the diameter of the cut reinforcing bar. Welding planes are provided on opposite sides of the ring-shaped component. The welding planes are the reinforcing bar connection structures, and the cut reinforcing bars are welded to the welding planes.

4. The connection structure at beam-wall joints in modular buildings according to claim 3, characterized in that: The annular component has four sides, two of which are opposite welding planes and the other two are arc-shaped surfaces.

5. The connection structure at beam-wall joints in modular buildings according to claim 1, characterized in that: The longitudinal reinforcement of the shear wall includes the longitudinal reinforcement of the concealed column and the longitudinal reinforcement of the wall body.

6. The connection structure at beam-wall joints in modular buildings according to claim 1, characterized in that: The load-bearing components of the beam are beam reinforcing bars, flat steel, angle steel, or hollow steel.

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