An L-shaped cross-section column-beam column node shear reinforcement structure

Abstract

The utility model discloses a kind of L-shaped section column beam column node shear reinforcement structure, including L-shaped section column body and the concrete structure beam connected therewith, the two ends of stress reinforcement are respectively implanted in L-shaped section column body and concrete structure beam using the mode of planting bar along horizontal direction in the connecting node position of L-shaped section column body and concrete structure beam, the exposed end of distribution steel bar is tied and fixed with stress reinforcement and is poured to form new haunch, the structural stability of beam-column joint connecting position is enhanced, this structure reinforcement cost is low, construction is convenient, does not destroy original structure system;Through the fixed connection of U-shaped steel frame through inclined strut component and L-shaped inner bracing plate and L-shaped outer cladding, the support force of concrete structure beam lower part can be effectively improved, to disperse the stress of node position.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, specifically to a shear-strengthening structure for an L-shaped cross-section column-beam-column joint. Background Technology

[0002] Irregularly shaped column structures increase the building's usable floor area due to the assimilation of column ribs with infill walls, giving them a significant advantage in modern residential architecture. Compared to rectangular cross-section columns, L-shaped cross-section columns are more suitable for architectural designs requiring specific spatial layouts, such as certain building corners or situations where space needs to be utilized at corners. Due to their unique shape, L-shaped columns can serve a combination of decoration and function in buildings. However, their slender column cross-sections and crowded reinforcement within joints lead to more complex load transfer. Numerous studies have shown that in existing multi-story L-shaped cross-section irregularly shaped column structures, when changes in building function lead to increased loads or when the concrete strength fails to meet design strength after reaching the design service life, structural testing and modeling calculations often reveal insufficient shear resistance in the core area of ​​beam-column joints. Currently, the common method is to replace concrete with higher-grade concrete, but this method is difficult to construct and expensive. Therefore, this case study was developed to address these issues. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a shear-strengthening structure for L-shaped cross-section column-beam-column joints, solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an L-shaped cross-section column-beam joint shear reinforcement structure, comprising an L-shaped cross-section column body and a concrete structural beam connected thereto. Along the horizontal direction, at the connection node between the L-shaped cross-section column body and the concrete structural beam, both ends of the reinforcing bars are respectively implanted into the L-shaped cross-section column body and the concrete structural beam using a rebar anchoring method. Distributed reinforcing bars are implanted within both the L-shaped cross-section column body and the concrete structural beam. The exposed ends of the distributed reinforcing bars are tied and fixed to the reinforcing bars and cast to form new armholes. A U-shaped steel frame is bonded to the lower part of the concrete structural beam using structural adhesive. An L-shaped inner support plate is bonded to the inner corner of the L-shaped cross-section column, and an L-shaped outer protective plate is bonded to the outer corner of the L-shaped cross-section column. The L-shaped inner support plate and the L-shaped outer protective plate are reinforced and fixed by tie rods. Fixing seats are welded to the exposed ends of the L-shaped inner support plate and the L-shaped outer protective plate. The fixing seats are fixedly connected to the U-shaped steel frame by diagonal bracing members.

[0005] The newly added haunch and the connection points of the L-shaped cross-section column body and the concrete structural beam are reinforced and fixed by steel plates and anchor bolts, respectively.

[0006] The aforementioned diagonal bracing components include steel diagonal bracing supports and steel support columns. The steel diagonal bracing supports are respectively assembled and connected to the fixed base and the lower end face of the U-shaped steel frame. The two ends of the steel support columns are assembled and fixed to the steel diagonal bracing supports through flange seats.

[0007] The aforementioned tie rod includes a double-ended screw. The L-shaped cross-section column body has a through hole. The double-ended screw is inserted into the through hole and fixed by an anchoring agent. The exposed end of the double-ended screw is fixedly connected to the L-shaped inner support plate and the L-shaped outer protective plate by fastening bolts.

[0008] A horizontal armhole is provided between the short limbs of the L-shaped cross-section column body.

[0009] The connection node between the L-shaped column body and the concrete structural beam is provided with a vertical haunch at the bottom.

[0010] This utility model provides a shear-strengthening structure for an L-shaped cross-section column-beam-column joint. It offers the following advantages: In this shear-strengthening structure, at the connection point between the L-shaped column and the concrete beam, the ends of the reinforcing bars are embedded into both the L-shaped column and the concrete beam using a rebar anchoring method. Distributed reinforcing bars are embedded within both the L-shaped column and the concrete beam. The exposed ends of these distributed bars are tied and fixed to the reinforcing bars and cast to form new armholes, enhancing the structural stability of the beam-column joint connection. This structure is cost-effective, easy to construct, and does not damage the original structural system. A U-shaped steel frame is fixedly connected to the L-shaped inner support plate and the L-shaped outer protective plate via diagonal bracing members, effectively increasing the support force on the lower part of the concrete beam and thus dispersing the stress at the joint. The L-shaped inner support plate and the L-shaped outer protective plate are further fixed using tie rods, making the connection between the L-shaped inner support plate, the L-shaped outer protective plate, and the L-shaped column more stable, thereby further enhancing the overall support reliability and structural strength of the joint structure. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the L-shaped cross-section column-beam-column joint shear reinforcement structure described in this utility model.

[0012] Figure 2 This is a rear view schematic diagram of the shear-strengthening structure of the L-shaped cross-section column-beam-column joint described in this utility model.

[0013] Figure 3 This utility model Figure 2 A schematic diagram of the cross-sectional structure at position AA.

[0014] In the diagram: 1. L-shaped cross-section column body; 2. Concrete structural beam; 3. Reinforcing steel bars; 4. Distribution steel bars; 5. Newly added haunch; 6. U-shaped steel frame; 7. L-shaped inner support plate; 8. L-shaped outer protective plate; 9. Fixing seat; 10. Steel plate; 11. Anchor bolt; 12. Steel diagonal brace support; 13. Steel support column; 14. Double-ended threaded rod; 15. Fastening bolt; 16. Horizontal haunch; 17. Vertical haunch. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example: Refer to the appendix of the instruction manual Figure 1-3 As can be seen, this application specifically designs an L-shaped cross-section column-beam-column joint shear reinforcement structure. Along the horizontal direction, at the connection node between the L-shaped cross-section column body 1 and the concrete structural beam 2, the two ends of the reinforcing steel bars 3 are respectively implanted into the L-shaped cross-section column body 1 and the concrete structural beam 2 using a rebar anchoring method. Distribution steel bars 4 are implanted in both the L-shaped cross-section column body 1 and the concrete structural beam 2. The exposed ends of the distribution steel bars 4 are tied and fixed to the reinforcing steel bars 3 and cast to form a new armhole 5. A U-shaped steel frame 6 is bonded to the lower part of the concrete structural beam 2 with structural adhesive. An L-shaped inner support plate 7 is bonded to the inner corner of the L-shaped cross-section column, and an L-shaped outer protective plate 8 is bonded to the outer corner of the L-shaped cross-section column. The L-shaped inner support plate 7 and the L-shaped outer protective plate 8 are reinforced and fixed by tie rods. Fixing seats 9 are welded to the exposed ends of the L-shaped inner support plate 7 and the L-shaped outer protective plate 8. The fixing seats 9 are fixedly connected to the U-shaped steel frame 6 by diagonal bracing members. This L-shaped cross-section column-beam-column joint shear reinforcement structure, along the horizontal direction... At the connection node between the L-shaped cross-section column body 1 and the concrete structural beam 2, the two ends of the reinforcing steel bars 3 are respectively implanted into the L-shaped cross-section column body 1 and the concrete structural beam 2 by means of rebar anchoring. Distribution steel bars 4 are implanted in both the L-shaped cross-section column body 1 and the concrete structural beam 2. The exposed ends of the distribution steel bars 4 are tied and fixed to the reinforcing steel bars 3 and cast to form a new armhole 5, which enhances the structural stability of the beam-column connection. This structural reinforcement has low cost, is easy to construct, and does not damage the original structural system. The U-shaped steel frame 6 is fixedly connected to the L-shaped inner support plate 7 and the L-shaped outer protective plate 8 through diagonal bracing members, which can effectively improve the support force on the lower part of the concrete structural beam 2, thereby dispersing the force at the node. The L-shaped inner support plate 7 and the L-shaped outer protective plate 8 are reinforced and fixed by tie rods, making the connection between the L-shaped inner support plate 7, the L-shaped outer protective plate 8 and the L-shaped cross-section column body 1 more stable, thereby further enhancing the support reliability and structural strength of the overall node structure.

[0017] In the specific implementation process, the connection positions of the newly added armpit 5 with the L-shaped cross-section column body 1 and the concrete structural beam 2 are reinforced and fixed by steel plate 10 and anchor bolt 11, respectively, thereby improving the connection structure strength between the newly added armpit 5 and the L-shaped cross-section column body 1 and the concrete structural beam 2.

[0018] In the specific implementation process, the above-mentioned diagonal bracing components include steel diagonal bracing supports 12 and steel support columns 13. The steel diagonal bracing supports 12 are respectively assembled and connected to the fixed base 9 and the lower end face of the U-shaped steel frame 6. The two ends of the steel support columns 13 are assembled and fixed to the steel diagonal bracing supports 12 through flange seats. The structure is reliable, the assembly is convenient, and the support is good.

[0019] In the specific implementation process, the above-mentioned tie rod includes a double-ended screw 14. A through hole is opened on the L-shaped cross-section column body 1. The double-ended screw 14 is inserted into the through hole and fixed by anchoring agent. The exposed end of the double-ended screw 14 is fixedly connected to the L-shaped inner support plate 7 and the L-shaped outer protective plate 8 by fastening bolts 15, so that the connection between the L-shaped cross-section column body 1 and the L-shaped inner support plate 7 and the L-shaped outer protective plate 8 is more firm and stable.

[0020] In the specific implementation process, a horizontal armhole 16 is provided between the short limbs of the L-shaped cross-section column body 1.

[0021] In the specific implementation process, a vertical haunch 17 is provided at the lower part of the connection node between the L-shaped cross-section column body 1 and the concrete structural beam 2.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shear-strengthening structure for an L-shaped cross-section column-beam-column joint, comprising an L-shaped cross-section column body and a concrete structural beam connected thereto, characterized in that, Along the horizontal direction, at the connection node between the L-shaped cross-section column and the concrete structural beam, the two ends of the stressed reinforcing bars are respectively implanted into the L-shaped cross-section column and the concrete structural beam using a rebar anchoring method. Distributed reinforcing bars are implanted in both the L-shaped cross-section column and the concrete structural beam. The exposed ends of the distributed reinforcing bars are tied and fixed to the stressed reinforcing bars and cast to form new armholes. A U-shaped steel frame is bonded to the lower part of the concrete structural beam with structural adhesive. An L-shaped inner support plate is bonded to the inner corner of the L-shaped cross-section column, and an L-shaped outer protective plate is bonded to the outer corner of the L-shaped cross-section column. The L-shaped inner support plate and the L-shaped outer protective plate are reinforced and fixed by tie rods. Fixing seats are welded to the exposed ends of the L-shaped inner support plate and the L-shaped outer protective plate. The fixing seats are fixedly connected to the U-shaped steel frame by diagonal bracing members.

2. The shear-strengthening structure for an L-shaped cross-section column-beam-column joint according to claim 1, characterized in that, The newly added axle is reinforced and fixed to the L-shaped cross-section column body and the concrete structural beam by steel plates and anchor bolts, respectively.

3. The shear-strengthening structure for an L-shaped cross-section column-beam-column joint according to claim 1, characterized in that, The diagonal bracing component includes a steel diagonal bracing support and a steel support column. The steel diagonal bracing support is respectively assembled and connected to the fixed base and the lower end face of the U-shaped steel frame. The two ends of the steel support column are assembled and fixed to the steel diagonal bracing support through flange seats.

4. The shear-strengthening structure for an L-shaped cross-section column-beam-column joint according to claim 1, characterized in that, The tie rod includes a double-ended screw. The L-shaped cross-section column body has a through hole. The double-ended screw is inserted into the through hole and fixed by an anchoring agent. The exposed end of the double-ended screw is fixedly connected to the L-shaped inner support plate and the L-shaped outer protective plate by fastening bolts.

5. The shear-strengthening structure for an L-shaped cross-section column-beam-column joint according to claim 1, characterized in that, A horizontal armhole is provided between the short limbs of the L-shaped cross-section column body.

6. The shear-strengthening structure for an L-shaped cross-section column-beam-column joint according to claim 1, characterized in that, A vertical haunch is provided at the lower part of the connection node between the L-shaped cross-section column body and the concrete structural beam.

Images