Beam bottom expanded section reinforcing structure
By widening and reinforcing the bottom of the beam on three sides, and using components such as closed stirrups and connecting bars, the problem of reduced load-bearing capacity at the bottom of the beam is solved, thereby improving structural stability and durability. This method is suitable for building reinforcement projects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-07
AI Technical Summary
The existing beam bottom structure has reduced load-bearing capacity due to fatigue and deformation, and the building's usage requirements have changed, necessitating reinforcement to meet new load or functional needs.
By widening and reinforcing the bottom of the beam on three sides, using components such as closed stirrups, U-shaped stirrups and connecting bars, the width and height of the bottom of the beam are increased, and trapezoidal grooves are formed by pouring concrete to enhance the connection strength.
It improves the connection strength between the bottom and top of the beam, enhances the stability and durability of the beam structure, extends its service life, and is easy and cost-effective to construct.
Smart Images
Figure CN224093032U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to building structure reinforcing technical field, especially a beam bottom expansion section reinforcing structure. BACKGROUND
[0002] Beam bottom expansion section reinforcing is to increase additional concrete or reinforcing material in the beam bottom part, thereby increasing the section size of the beam bottom, enhancing the rigidity, improving the stress performance, and improving the bearing capacity and stability of the beam. With the increase of the building service life, the beam bottom may be caused by fatigue, deformation and other problems to cause the bearing capacity to drop, and through reinforcing, such as increasing the section size of the beam, using reinforcing material, thereby improving the bearing capacity. In addition, the use requirements of the building may change, such as increasing the load, changing the use function, and this also needs to reinforce the beam bottom to meet the new use requirements. SUMMARY
[0003] The utility model discloses a beam bottom expansion section reinforcing structure, which improves the bearing capacity of the repaired beam bottom structure by widening and reinforcing three sides of the beam bottom.
[0004] The utility model discloses a beam bottom expansion section reinforcing structure, which improves the bearing capacity of the repaired beam bottom structure by widening and reinforcing three sides of the beam bottom.
[0005] When the utility model works, the closed stirrup is welded along the width direction of the original frame beam, the width and height of the beam bottom are widened at the same time, and the connecting bar is implanted into the beam bottom from the closed stirrup to reinforce and stabilize, thereby improving the connecting strength of the beam bottom reinforcing structure.
[0006] Compared with the prior art, the utility model has the beneficial effects that:
[0007] First, the reinforcing structure of the device reinforces three sides of the beam bottom, increases the width and height of the beam bottom, improves the connecting strength of the beam bottom and the beam top, makes the beam structure more stable when bearing external force, and the repaired beam bottom structure meets the bearing requirement and improves the durability, which helps to prolong the service life of the overall structure.
[0008] Second, the U-shaped stirrup and the connecting bar are used to tightly connect the high part of the beam bottom and the original beam bottom, increase the structural strength of the connecting part, and ensure the bearing effect of the repaired beam structure.
[0009] Third, the reinforcing structure of the device is simple to construct, does not require large equipment, uses less material, and has low cost, and can be adjusted in terms of the number and position distribution of the closed stirrups and embedded bars according to different specifications and sizes of the frame beam, and is highly adaptable.
[0010] Further, one end of the connecting bar is welded to the closed stirrup, and the other end is embedded into the original frame beam bottom and connected to the U-shaped hoop, and a lateral reinforcing strip of rigid material is arranged on the inside of the welded end of the connecting bar and the closed stirrup; the connecting bar stably connects the externally added closed stirrup to the original frame beam bottom, increases the connection strength between the widened portions on both sides of the beam bottom and the original beam bottom, and the lateral reinforcing strip can enhance the connection strength at the welded position of the connecting bar and the closed stirrup, helps to disperse local stress, and avoids damage to the structure.
[0011] Further, the connecting bar is L-shaped, the embedded length of the connecting bar into the original frame beam bottom is 10 times the diameter of the connecting bar, and the connecting bar is symmetrically embedded into two groups on both sides of the original frame beam bottom, which helps to keep the widened portions on both sides of the beam bottom balanced, the L-shaped connecting bar can ensure the accuracy and stability of the position of the closed stirrup, avoids deviation of the closed stirrup outside the original frame beam bottom, and can also transmit the torque force on the closed stirrup, which helps to keep the repaired beam bottom structure intact and improves the bearing capacity and stability of the repaired beam bottom structure.
[0012] Further, the upper and lower ends of the closed stirrup are respectively provided with upper and lower reinforcing bars, and the lower reinforcing bars are arranged in two groups along the lower part of the closed stirrup; the upper and lower reinforcing bars improve the structural strength of the connection between the closed stirrup and the frame beam top and the original frame beam bottom, and disperse local stress at the connection.
[0013] Further, the upper and lower reinforcing bars are made of high-strength carbon steel, have high structural strength, and have good cold bending and toughness.
[0014] Further, the surface of the original frame beam bottom is roughened, and the roughening depth is 5-8 cm; the roughening process removes the hard parts inside the concrete on the original frame beam bottom, improves the surface roughness, helps to improve the adhesion when the subsequent concrete is mixed, and improves the overall strength of the repaired beam bottom structure.
[0015] Further, the trapezoidal notch is trumpet-shaped with the upper part being wide and the lower part being narrow, concrete can be poured through the trapezoidal notch, the upper part of the trapezoidal notch is wide, the contact area between the widened beam edge and the frame beam top is increased, and the structural strength of the connection is improved. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a schematic view of the beam bottom expansion section reinforcing structure of the utility model.
[0017] Figure 2This is a schematic diagram of another embodiment of the present invention.
[0018] Figure 3 This is a schematic diagram of another embodiment of the present invention.
[0019] In the diagram above, 1 is the top of the frame beam, 2 is the bottom of the original frame beam, 3 is the widened beam edge, 4 is the closed stirrup, 5 is the transverse reinforcement strip, 6 is the U-shaped stirrup, 7 is the embedded reinforcement, 8 is the connecting reinforcement, 9 is the notch, 10 is the trapezoidal groove, 11 is the upper reinforcement, and 12 is the lower reinforcement. Detailed Implementation
[0020] Example 1
[0021] like Figure 1 As shown in the figure, this embodiment shows a reinforcement structure with a three-sided expanded cross-section at the bottom of the beam. Closed stirrups 4 are welded to the stirrups on one side of the original beam bottom 2 along the outer periphery of the original beam bottom 2. The upper end of the closed stirrups 4 is connected to the top 1 of the frame beam. U-shaped stirrups 6 are provided inside the closed stirrups 4. Inserted bars 7 are welded to both ends of the bottom of the U-shaped stirrups 6. The upper end of the U-shaped stirrups 6 extends into the bottom 2 of the original frame beam. Two sets of connecting bars 8 are symmetrically welded to both sides of the closed stirrups 4 facing the inside of the bottom 2 of the original frame beam. One end of the connecting bar 8 is welded to the closed stirrups 4, and the other end is inserted into the bottom 2 of the original frame beam and connected to the U-shaped stirrups 6. Rigid transverse reinforcing strips 5 are provided on the inner side of the welded ends of the connecting bars 8 and the closed stirrups 4. The connecting bars 8 are L-shaped. The length of the connecting bars 8 inserted into the bottom 2 of the original frame beam is 10 times the diameter of the connecting bars 8. A notch 9 is provided at the connection between the top 1 of the frame beam and the bottom 2 of the original frame beam. The widened beam edges 3 on both sides of the notch 9 extend into the top 1 of the frame beam and form trapezoidal grooves 10.
[0022] The closed stirrup 4 is provided with upper reinforcing bars 11 and lower reinforcing bars 12 at its upper and lower ends, respectively. The lower reinforcing bars 11 are arranged in two sets at intervals along the lower part of the closed stirrup 4. The upper reinforcing bars 11 and lower reinforcing bars 12 improve the structural strength of the connection between the closed stirrup 4 and the top 1 of the frame beam and the bottom 2 of the original frame beam, and disperse the local stress at the connection. The upper reinforcing bars 11 and lower reinforcing bars 12 are made of high-strength carbon steel, with high structural strength and good cold bending and toughness.
[0023] The surface of the bottom 2 of the original frame beam is roughened to a depth of 5-8cm. By roughening the hard part of the concrete inside the bottom 2 of the original frame beam, the surface roughness is improved, which helps to improve the adhesion when the concrete is poured and mixed, and improves the overall strength of the repaired beam bottom structure.
[0024] The trapezoidal slot 10 is flared, wider at the top and narrower at the bottom, allowing concrete to be poured through it. The wider top of the trapezoidal slot 10 increases the contact area between the widened beam edge 3 and the top of the frame beam 1, thereby improving the structural strength of the connection.
[0025] Example 2
[0026] As Figure 2 shown, the embodiment shows a beam bottom single-face expanded section reinforcing structure, U-shaped hoops 6 are welded along the original beam hoops of the outer side surface of the original frame beam bottom 2, one end of the U-shaped hoops 6 is connected with the frame beam top 1, the other end is connected with the original frame beam bottom 2, the connecting parts of the upper and lower sides of the U-shaped hoops 6 with the frame beam top 1 and the original frame beam bottom 2 are welded with embedded bars 7, L-shaped connecting bars 8 are welded and fixed inside the U-shaped hoops 6 towards the original frame beam bottom 2, transverse reinforcing bars 5 are arranged at the connecting parts of the L-shaped connecting bars 8 with the U-shaped hoops 6, and the connecting bars 8 are embedded into the original frame beam bottom 2 with a length of 10 times the diameter of the connecting bars 8.
[0027] Embodiment 3
[0028] Figure 3 As
[0029] The beam bottom expanded section reinforcing structure of the utility model in construction, first to the beam bottom surface is chiseled rough processing, to expose the hard pebbles inside the concrete, increase the roughness of the surface, improve the bonding force between the new and old concrete, also remove the surface of the paste, dirt, etc., avoid to produce damage to the repair beam bottom structure, after the beam hoop on the surface of the original frame beam bottom 2 hoop 4 is welded, again through U-shaped hoop 6 and connecting bar 8 the original frame beam bottom 2 and widened beam edge 3 stable connection, after the completion of the external reinforcement welding, through the trapezoidal notch 10 between widened beam edge 3 and frame beam top 1 pours concrete, ensure that the concrete is dense, uniform, can adopt the vibration rod vibration, ensure that the concrete is dense, finally the reinforcing structure is maintained until the completion of reinforcing operation. The reinforcing structure of the device can be according to the beam bottom repair requirements one side, double face or three face reinforcement, increase the beam bottom width, height, improve the connection strength of the repair beam bottom structure and the original frame beam top, make the beam structure more stable when bearing external force, the repaired beam bottom structure meets the bearing requirement, and improves the durability, helps to prolong the service life of the overall structure, suitable for use in building reinforcement engineering.
[0030] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.
Claims
1. A beam bottom widening section reinforcement structure, characterized in that: It includes closed stirrups welded along the outer perimeter of the bottom of the original frame beam. The upper end of the closed stirrups is connected to the top of the frame beam. A U-shaped stirrup is provided inside the closed stirrup. Inserted bars are welded to both ends of the bottom of the U-shaped stirrup. The upper end of the U-shaped stirrup extends into the bottom of the original frame beam. Multiple sets of connecting bars are welded to both sides of the closed stirrups facing the inside of the bottom of the original frame beam. A notch is provided at the connection between the top of the frame beam and the bottom of the original frame beam. The widened beam edges on both sides of the notch extend into the top of the frame beam and form a trapezoidal groove.
2. The beam bottom widening section reinforcement structure according to claim 1, characterized in that: One end of the connecting bar is welded to the closed stirrup, and the other end is inserted into the bottom of the original frame beam and connected to the U-shaped stirrup. A rigid transverse reinforcing strip is provided on the inner side of the welded end of the connecting bar and the closed stirrup.
3. The beam bottom widening section reinforcement structure according to claim 2, characterized in that: The connecting bar is L-shaped, and the length of the connecting bar inserted into the bottom of the original frame beam is 10 times the diameter of the connecting bar. Two sets of the connecting bars are symmetrically inserted on both sides of the bottom of the original frame beam.
4. The beam bottom widening section reinforcement structure according to claim 1, characterized in that: The closed stirrup is provided with upper reinforcing bars and lower reinforcing bars at its upper and lower ends, respectively, and the lower reinforcing bars are arranged in two sets at intervals along the lower part of the closed stirrup.
5. The beam bottom widening section reinforcement structure according to claim 4, characterized in that: The upper and lower reinforcing ribs are made of high-strength carbon steel.
6. A beam bottom widening section reinforcement structure according to any one of claims 1 to 5, characterized in that: The bottom surface of the original frame beam is roughened to a depth of 5-8 cm.
7. A beam bottom widening section reinforcement structure according to any one of claims 1 to 5, characterized in that: The trapezoidal slot is flared, wider at the top and narrower at the bottom.