A concrete frame structure reinforcing device and construction method

Abstract

This invention relates to the field of structural reinforcement technology, and discloses a reinforcement device and construction method for a concrete frame structure. The device includes a casting frame, a V-shaped plate, and an inverted V-shaped support plate. The casting frame covers the outside of the beam-column joint, the V-shaped plate is fixed to one side of the casting frame, and the inverted V-shaped support plate is perpendicularly connected to the V-shaped plate to form a symmetrical triangular load-bearing structure. The inner wall of the casting frame is provided with a frame plate and two sets of vertically arranged L-shaped studs. One end of each stud is embedded in the core load-bearing area of ​​the beam, and the other end passes through the casting frame and the V-shaped plate. In this invention, through the segmented load-bearing of the L-shaped studs and the synergistic effect of the triangular load-bearing structure, the shear and torsional resistance and seismic stability of the joint can be improved without enlarging the beam-column cross-section, optimizing the force transmission path, not occupying building space, and ensuring that the joint is not damaged during an earthquake and that force transmission is smooth.

Description

Technical Field

[0001] This invention relates to the field of structural reinforcement technology, and in particular to a reinforcement device and construction method for concrete frame structures. Background Technology

[0002] my country is a country prone to earthquakes, with widespread areas designated for high-intensity seismic fortification at intensity 8 and above. The severe seismic characteristics place extremely high demands on the seismic performance of building structures. Reinforced concrete frame structures are the mainstream form for various types of buildings in high-intensity seismic zones. The beam-column joint, as the core connection point of the structural framework, directly determines the overall safety of the building due to its seismic performance. Traditional reinforced concrete frame beam-column joints rely on stirrups and concrete to resist shear force and on steel reinforcement anchorage to transfer bending moment, making them a crucial hub for structural load transfer. Conventional reinforcement methods often involve enlarging the cross-section of components, bonding reinforcement materials, or drilling and installing rebar in situ, relying on the simple bonding of the new structure with the original structure to achieve load-bearing enhancement.

[0003] Existing reinforcement technologies have prominent drawbacks: enlarging the cross-section of components increases the structural self-weight and encroaches on building space, and cannot optimize the force path, resulting in limited improvement in the shear and torsional resistance of nodes; traditional reinforcement will increase the density of steel bars at nodes, leading to incomplete concrete pouring, and nodes are prone to cracking and crushing and interruption of force transmission under seismic action. Summary of the Invention

[0004] To overcome the above shortcomings, the present invention provides a reinforcement device and construction method for concrete frame structures, aiming to improve the problems of existing reinforcement technologies such as increased cross-section weight and space occupation, poor joint stress and shear and torsional resistance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a concrete frame structure reinforcement device, comprising a casting frame, a V-shaped plate, and an inverted V-shaped support plate; the casting frame is disposed on the outside of the beam-column joint of the concrete frame, the V-shaped plate is fixedly disposed on one side of the casting frame, and the inverted V-shaped support plate is fixedly connected to the V-shaped plate and arranged perpendicularly to the V-shaped plate, the V-shaped plate and the inverted V-shaped support plate are combined to form a symmetrical triangular force-bearing structure; the casting frame is equipped with a frame plate and L-shaped studs, the frame plate is fixedly connected to the inner wall of the casting frame, and the L-shaped studs are arranged in two sets along two mutually perpendicular directions on the inner wall of the casting frame away from the V-shaped plate, one end of the L-shaped stud penetrates the frame plate and extends to the core force-bearing area of ​​the concrete beam, and the other end of the L-shaped stud penetrates the casting frame and the V-shaped plate in sequence.

[0006] Preferably, it also includes a welding block and a mounting bolt, wherein the welding block is fixedly welded to the V-shaped plate, and the mounting bolt is inserted and connected to the inverted V-shaped support plate, with the end of the mounting bolt away from the inverted V-shaped support plate passing through the welding block.

[0007] Preferably, it also includes a limiting bolt and an embedded nail, wherein the limiting bolt is fixedly installed on the inverted V support plate and its end is embedded inside the concrete column; the embedded nail is fixedly connected to the inverted V support plate and its tip is embedded inside the concrete column.

[0008] Preferably, it also includes an expansion ring, which is embedded inside the V-shaped plate, and an L-shaped support pin is provided through the expansion ring, with the expansion ring tightly wrapping the L-shaped support pin.

[0009] Preferably, it also includes a side plate, a partition, a connecting plate, a U-shaped plate, and a second embedded nail. The side plate is fixedly connected to the casting frame by an L-shaped support nail. The partition is supported between the casting frame and the side plate. The connecting plate is fixedly connected to the side of the side plate away from the V-shaped plate. The U-shaped plate is fixedly welded to the connecting plate. The second embedded nail is fixedly connected to the U-shaped plate with its tip embedded in the surface of the concrete beam and column.

[0010] A construction method for a reinforcement device for a concrete frame structure includes the following steps:

[0011] S1: The casting frame is wrapped and installed on the outside of the beam-column joint of the concrete frame;

[0012] S2: Fix the V-shaped plate to one side of the pouring frame;

[0013] S3: The inverted V-shaped support plate and the V-shaped plate are fixedly connected to form a symmetrical triangular force-bearing structure;

[0014] S4: Install frame plates on the inner wall of the casting frame;

[0015] S5: Two sets of L-shaped supports arranged perpendicularly to each other pass through the frame plate, casting frame and V-shaped plate, so that one end of the L-shaped support extends to the core area of ​​the beam.

[0016] Preferably, in step S3, the welding block is welded and fixed to the V-shaped plate, and the inverted V support plate and the welding block are locked together through the mounting bolts to enhance the rigid connection stability between the V-shaped plate and the inverted V support plate.

[0017] Preferably, in step S3, the limiting bolt is installed on the inverted V support plate and embedded inside the concrete column, and the embedded nail is fixed on the inverted V support plate and driven into the column to achieve anti-pull-out and anti-slip anchoring between the device and the column.

[0018] Preferably, in step S5, the expansion ring is embedded in the mounting hole of the V-shaped plate, and the L-shaped support pin passes through the expansion ring. The radial squeezing action of the expansion ring eliminates the connection gap and prevents the components from loosening due to the reciprocating vibration of the earthquake.

[0019] Preferably, in step S5, the side plate is fixed to the casting frame with L-shaped studs, a spacer is added between the casting frame and the side plate, the side plate and the U-shaped plate are connected by a connecting plate, and the embedded nails are driven into the concrete surface to complete the overall installation of the device and integrate it with the beam-column joint.

[0020] The present invention has the following beneficial effects:

[0021] 1. This invention features a frame plate fixedly installed at the inner top of the casting frame near the beam. The frame plate serves both as the mounting and positioning carrier for the L-shaped studs and as an auxiliary support structure for the joint, enhancing the overall component's resistance to deformation. The L-shaped studs, installed between the casting frame and the frame plate, employ a segmented load-bearing design. One end penetrates the frame plate and extends vertically upwards, directly embedding into the core load-bearing area of ​​the beam to form a coordinated anchorage with the beam's reinforcing steel. The other end is bent at a 90-degree angle and penetrates the side wall of the casting frame. During construction, this structural component is pre-installed at the beam-column joint. After positioning and calibration, it simultaneously participates in the column concrete pouring operation. This enhances the joint's load-bearing capacity without enlarging the column cross-section. The fusion and solidification of concrete and the component form a steel-concrete composite rigid connection joint, efficiently transferring shear force and bending moment between the beam and column. This design does not occupy internal building space and significantly improves the joint's seismic stability.

[0022] 2. This invention is based on the overall load-bearing structure of the casting frame. L-shaped supports extend through one end of the casting frame's sidewall and pass through pre-set mounting holes in the V-shaped plate. To ensure connection reliability under high-intensity earthquakes, this connection employs a dual connection method combining bolt fixing and welding reinforcement. Bolts provide initial tightening force, while welding further eliminates connection gaps, forming a rigid node without loosening, effectively preventing connection failure caused by reciprocating earthquake loads. The V-shaped plate, as the core of the node's load transfer, is fixedly welded to the inverted V-shaped support plate on its side perpendicular to the casting frame. The combination of the two forms a symmetrical triangular stable load-bearing structure. The two inclined sides of the inverted V-shaped support plate are connected to the beams on both sides of the frame, and the bottom is tightly fitted to the column. Relying on the geometric stability of the triangular structure, the horizontal seismic force transmitted by the beams is evenly distributed to the column, while simultaneously offsetting the tensile and compressive stresses in the node area, significantly improving the node's shear and torsional resistance.

[0023] 3. This invention uses L-shaped supports to connect the components in series. The overall installation process does not require dense drilling and rebar installation on the original concrete structure. Fixing can be completed simply by the precise docking of the pre-set components, which minimizes damage to the concrete body and avoids the problem of insufficient concrete pouring caused by excessive steel structure layout in traditional reinforcement methods. It ensures the collaborative working efficiency of steel and concrete in the node area and meets the stringent requirements of the overall integrity of the node under the seismic action in high-intensity areas. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 A schematic diagram of the overall structure of the casting frame;

[0026] Figure 3 A schematic diagram of the overall structure of the casting frame from below;

[0027] Figure 4 A frontal view of the overall structure of the V-shaped plate and the inverted V-shaped support plate;

[0028] Figure 5 This is a side view schematic diagram of the overall structure of the V-shaped plate and the inverted V-shaped support plate;

[0029] Figure 6 This is a schematic diagram of the overall structure of the welded block;

[0030] Figure 7 This is a schematic diagram of the overall structure of the side panel and the U-shaped panel.

[0031] Legend:

[0032] 1. Casting frame; 101. Frame plate; 102. L-shaped support pin; 2. V-shaped plate; 201. Welding block; 202. Expansion ring; 3. Inverted V-shaped support plate; 301. Limiting bolt; 302. Embedded nail one; 303. Mounting bolt; 4. Side plate; 401. Spacer block; 402. Connecting plate; 5. U-shaped plate; 501. Embedded nail two. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1, refer to Figures 1-7A concrete frame structure reinforcement device includes a casting frame 1, a V-shaped plate 2, and an inverted V-shaped support plate 3. The casting frame 1 is tightly wrapped around the outside of the beam-column joint of the concrete frame, capable of bearing external loads at the joint from all directions, serving as the core load-bearing skeleton for overall stability. The V-shaped plate 2 is firmly fixed to one side of the casting frame 1 to realize the transfer of force. The inverted V-shaped support plate 3 is fixedly connected to the V-shaped plate 2 and is arranged perpendicular to the V-shaped plate 2. The V-shaped plate 2 and the inverted V-shaped support plate 3 combine to form a symmetrical triangular force-bearing structure. Relying on the stability characteristics of the triangular structure, the seismic force transmitted by the beam is decomposed, dispersed, and smoothly transmitted to the concrete column. Effectively alleviates the problem of stress concentration at nodes; the casting frame 1 is equipped with a frame plate 101 and L-shaped support nails 102. The frame plate 101 is stably fixed to the inner wall of the casting frame 1, which can play the role of positioning reinforcement and auxiliary force bearing. The L-shaped support nails 102 are set in two groups and arranged in two mutually perpendicular directions on the inner wall of the casting frame 1 away from the V-shaped plate 2, so that the force bearing is more uniform. One end of the L-shaped support nail 102 penetrates the frame plate 101 and extends to the core area of ​​the concrete beam, forming a tight anchor with the internal steel bars of the beam. The other end of the L-shaped support nail 102 penetrates the casting frame 1 and the V-shaped plate 2 in sequence, so as to smoothly complete the overall force transmission.

[0035] Example 2, refer to Figures 1-7 Based on Embodiment 1, it also includes a welding block 201 and a mounting bolt 303. The welding block 201 is firmly fixed and welded to the V-shaped plate 2, with sufficient welding contact area to ensure connection strength. The mounting bolt 303 is inserted and connected to the inverted V support plate 3. The end of the mounting bolt 303 away from the inverted V support plate 3 passes through the welding block 201. Combined with welding and fixing, a double connection and reinforcement structure is formed, realizing a rigid fixed connection between the inverted V support plate 3 and the V-shaped plate 2, effectively resisting structural loosening caused by seismic reciprocating loads.

[0036] It also includes a limiting bolt 301 and an embedded nail 302. The limiting bolt 301 is fixedly installed on the inverted V support plate 3 and its end is embedded in the concrete column, which can form a vertical restraint force to limit the upward displacement of the device during vibration. The embedded nail 302 is fixedly connected to the inverted V support plate 3 and its tip is embedded in the concrete column, which can form a mechanical interlocking structure, greatly improving the interlocking anchoring strength between the device and the original structure and enhancing the overall anti-slip performance.

[0037] It also includes an expansion ring 202, which is tightly embedded in the reserved groove inside the V-shaped plate 2. An L-shaped support pin 102 is set through the expansion ring 202. The expansion ring 202 is compressed to generate radial tension and tightly wrap the L-shaped support pin 102 to eliminate the gaps in the component connection, fill the gaps between the components, and prevent the connection from loosening and shifting caused by long-term vibration and load.

[0038] It also includes a side plate 4, a partition 401, a connecting plate 402, a U-shaped plate 5, and an embedded nail 501. The side plate 4 is fixedly connected to the casting frame 1 by an L-shaped support nail 102, which widens the overall reinforcement force range. The partition 401 is evenly supported between the casting frame 1 and the side plate 4, which neatly divides the internal space and is used to reserve sufficient space for concrete filling. The connecting plate 402 is firmly fixedly connected to the side of the side plate 4 away from the V-shaped plate 2, which plays a role in smooth transition and force transmission. The U-shaped plate 5 is fixedly welded to the connecting plate 402, which can fit and cover the surface of the beam and column. The embedded nail 501 is fixedly connected to the U-shaped plate 5 and its tip is driven into the surface of the concrete beam and column, which further enhances the anchoring stability of the side structure.

[0039] Example 3, referring to Figures 1-7 A construction method for a reinforced concrete frame structure, comprising the following steps:

[0040] S1: Precisely wrap and install the casting frame 1 on the outside of the beam-column joint of the concrete frame, completely covering the core area of ​​the joint;

[0041] S2: Securely fix the V-shaped plate 2 to one side of the casting frame 1 to complete the positioning and installation of the foundation load-bearing components;

[0042] S3: Fix the inverted V-shaped support plate 3 and the V-shaped plate 2 to form a symmetrical triangular force-bearing structure, and build the core distributed force transmission structure;

[0043] S4: Install the frame plate 101 flat on the inner wall of the casting frame 1 to provide a stable installation reference for the insertion of the support pins;

[0044] S5: Two sets of L-shaped support nails 102 arranged perpendicularly to each other pass through the frame plate 101, the casting frame 1 and the V-shaped plate 2 in sequence to realize the series force of each component.

[0045] In step S3, the welding block 201 is first fully welded and fixed on the V-shaped plate 2 to ensure the load-bearing strength of the welded structure. Then, the inverted V support plate 3 and the welding block 201 are locked together by the installation bolts 303. The combination of welding and bolt fixing methods greatly enhances the rigid connection stability between the V-shaped plate 2 and the inverted V support plate 3.

[0046] In step S3, the limiting bolt 301 is installed on the inverted V support plate 3 and deeply embedded into the concrete column to form a vertical pull-out restraint. At the same time, the embedded nail 302 is fixed on the inverted V support plate 3 and driven into the column to form an interlocking fixation, thus fully realizing the pull-out and anti-slip anchoring of the device and the column.

[0047] In step S5, the expansion ring 202 is first embedded into the mounting hole of the V-shaped plate 2 to complete the pre-installation positioning. Then, the L-shaped support pin 102 passes through the expansion ring 202. The radial squeezing action of the expansion ring 202 tightly fits the outer wall of the support pin to eliminate the connection gap, effectively preventing the components from loosening and shifting due to the reciprocating vibration of the earthquake.

[0048] In step S5, the side plate 4 is firmly fixed to the pouring frame 1 by L-shaped support nails 102. A partition block 401 is added between the pouring frame 1 and the side plate 4 to reserve pouring space. The side plate 4 and the U-shaped plate 5 are smoothly connected by the connecting plate 402. Finally, the embedded nail 501 is driven into the concrete surface to complete the side anchoring. The overall installation of the device is completed and it is integrated with the beam-column joint to share the load.

[0049] Working Principle: The horizontal force generated by the earthquake first acts on the surface of the beams in the concrete frame. The shear force and bending moment generated by the beams under the seismic cyclic load are directly transmitted to the beam-column connection nodes. The casting frame 1, which covers the outside of the beam-column connection nodes, forms a complete rigid load-bearing base, bearing all the concentrated forces at the nodes. The frame plate 101 fixedly connected to the casting frame 1 provides precise installation positioning and lateral rigid support for the L-shaped studs 102. The vertical section of the L-shaped stud 102 penetrates into the core load-bearing area inside the beam, forming a close and coordinated anchorage relationship with the steel reinforcement inside the beam, completely bearing the vertical load and horizontal seismic shear force transmitted by the beam. The horizontal section of the L-shaped stud 102 passes through the side wall of the casting frame 1 and the preset installation position of the V-shaped plate 2 in sequence, stably and continuously transmitting the concentrated forces to the V-shaped plate 2. V-shaped plate 2 and inverted V-shaped support plate 3 are rigidly connected to form a symmetrical triangular force-bearing structure. Relying on the geometric stability of the triangular structure, the tensile and compressive stresses and shear forces at the nodes are decomposed, and the originally concentrated forces are evenly distributed and then smoothly transmitted to the concrete column below, thus constructing a complete and smooth force transmission and distribution path from the beam to the node and then to the column.

[0050] The limiting bolts 301 on the inverted V-shaped support plate 3 are deeply embedded into the column and rigidly fixed, forming a reliable vertical pull-out constraint, effectively preventing the device from being pulled up or displaced under the vertical vibration component of an earthquake. The tips of the embedded nails 302 on the inverted V-shaped support plate 3 are deeply embedded into the concrete column, forming a strong mechanical engagement with the concrete, greatly improving the connection strength and anti-slip capability between the device and the original structure. The side plate 4 is welded to the casting frame 1 through L-shaped support nails 102, expanding the contact area between the device and the concrete structure. The spacer 401 is evenly supported between the casting frame 1 and the side plate 4, leaving a regular concrete filling space to ensure that the subsequent concrete pouring is dense and the force transmission path is clear. The connecting plate 402 rigidly connects the side plate 4 and the U-shaped plate 5. The U-shaped plate 5 fits tightly against the surface of the beam and column, and the embedded nails 501 on the U-shaped plate 5 are further embedded into the concrete, forming a multi-dimensional and all-round anchoring system. The expansion ring 202 inside the V-shaped plate 2 tightly wraps around the outer wall of the L-shaped support nail 102. When compressed, it generates radial expansion force, completely eliminating gaps in the component connections and preventing loosening of the connections caused by reciprocating seismic vibrations. All components of the entire device are completely integrated with the concrete structure, forming a steel-concrete composite load-bearing whole, which works together to resist the continuous reciprocating forces brought by high-intensity earthquakes, firmly ensuring that the beam-column joints do not crack, twist, or collapse.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reinforcement device for a concrete frame structure, characterized in that, The utility model provides a kind of concrete pouring frame, including pouring frame (1), V-shaped plate (2) and inverted V support plate (3);The pouring frame (1) is covered and arranged on the beam-column joint outside concrete frame, the V-shaped plate (2) is fixedly arranged in one side of pouring frame (1), the inverted V support plate (3) is fixedly connected on V-shaped plate (2) and is perpendicular with V-shaped plate (2) The V-shaped plate (2) and inverted V support plate (3) are combined to form symmetrical triangular force frame structure;The pouring frame (1) is provided with frame plate (101) and L-shaped support nail (102) in a matched manner, the frame plate (101) is fixedly connected on the inner wall of pouring frame (1), the L-shaped support nail (102) is arranged as two groups and is arranged in two mutually perpendicular directions on the inner wall of pouring frame (1) away from V-shaped plate (2), one end of L-shaped support nail (102) penetrates frame plate (101) and extends to the stress core area of concrete beam body, the other end of L-shaped support nail (102) penetrates pouring frame (1) and V-shaped plate (2) in sequence.

2. A device for reinforcing a concrete frame structure according to claim 1, characterized in that: It also includes welding block (201) and mounting bolt (303), the welding block (201) is fixedly welded on V-shaped plate (2), mounting bolt (303) is connected on inverted V support plate (3), one end of mounting bolt (303) away from inverted V support plate (3) penetrates welding block (201).

3. A device for reinforcing a concrete frame structure according to claim 1, wherein: It also includes limiting bolt (301) and embedded nail one (302), the limiting bolt (301) is fixedly installed on inverted V support plate (3) and end is implanted into concrete column interior;Embedded nail one (302) is fixedly connected on inverted V support plate (3) and sharp end is inserted into concrete column interior.

4. A device for reinforcing a concrete frame structure according to claim 1, wherein: It also includes expansion ring (202), the expansion ring (202) is embedded in the inside of V-shaped plate (2), L-shaped support nail (102) penetrates expansion ring (202) and is arranged, and expansion ring (202) tightly wraps L-shaped support nail (102).

5. A device for reinforcing a concrete frame structure according to claim 1, wherein: It also includes side plate (4), spacer block (401), connecting plate (402), U-shaped plate (5) and embedded nail two (501), the side plate (4) is fixedly connected with pouring frame (1) by L-shaped support nail (102), the spacer block (401) is supported and arranged between pouring frame (1) and side plate (4);The connecting plate (402) is fixedly connected on one side of side plate (4) away from V-shaped plate (2), the U-shaped plate (5) is fixedly welded on connecting plate (402), and the embedded nail two (501) is fixedly connected on the U-shaped plate (5) and the sharp end is inserted into the surface of concrete beam column.

6. A construction method of a concrete frame structure reinforcing device characterized by: It includes the following steps: S1: the pouring frame (1) is covered and installed on the beam-column joint outside concrete frame; S2: the V-shaped plate (2) is fixed on one side of pouring frame (1); S3: the inverted V support plate (3) is fixedly connected with V-shaped plate (2) to form symmetrical triangular force frame structure; S4: frame plate (101) is installed on the inner wall of pouring frame (1); S5: two groups of L-shaped support nails (102) arranged perpendicular to each other penetrate frame plate (101), pouring frame (1) and V-shaped plate (2), so that one end of L-shaped support nail (102) extends to the stress core area of beam body.

7. The method of claim 6, wherein: In step S3, the welding block (201) is welded and fixed on the V-shaped plate (2), and the inverted V support plate (3) and the welding block (201) are locked together by the mounting bolt (303) to strengthen the rigid connection stability between the V-shaped plate (2) and the inverted V support plate (3).

8. The method of claim 6, wherein: In step S3, the limiting bolt (301) is installed on the inverted V support plate (3) and implanted into the concrete column. The embedded nail (302) is fixed on the inverted V support plate (3) and driven into the column to achieve anti-pull-out and anti-slip anchoring of the device and the column.

9. The method of claim 6, wherein: In step S5, the expansion ring (202) is embedded in the mounting hole of the V-shaped plate (2), and the L-shaped support pin (102) passes through the expansion ring (202). The radial squeezing action of the expansion ring (202) eliminates the connection gap and avoids the component from loosening due to the reciprocating vibration of the earthquake.

10. The method of claim 6, wherein: In step S5, the side plate (4) is fixed to the casting frame (1) by L-shaped support nails (102), a partition block (401) is added between the casting frame (1) and the side plate (4), the side plate (4) and the U-shaped plate (5) are connected by the connecting plate (402), and the embedded nail (501) is driven into the concrete surface to complete the overall installation of the device and integrate it with the beam-column joint.

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