JP2022122216A - Structure for reinforcement by partially cutting connection beam destroyed by earthquake and reinforcement method - Google Patents

Abstract

To provide a structure for reinforcement by partially cutting a connection beam destroyed by earthquake and a reinforcement method.SOLUTION: A reinforcement structure 3 includes a frame body 31, a transfer component 32, and a coupling component 33, and a reinforcement method includes a step 1 for partially cutting a connection beam destroyed by earthquake, a step 2 for reinforcing residual step of the connection beam, and a step 3 for adding a damper. By obtaining the connection beam having an excellent energy dissipation property by reinforcing the residual step of the connection beam, in a repair issue of the connection beam destroyed by earthquake or the like, it is only required to replace the damper without reinforcement when earthquake occurs again, resulting in saving of time and energy.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to the technical field of reinforcement of building structures, and more particularly to a structure and reinforcement method for partially cutting and reinforcing connection beams destroyed by an earthquake.

A connection beam is a seismic wall structure and a frame. In a seismic wall structure, a beam that connects wall pillars to wall pillars and connects them in the wall pillar plane. The connecting beams generally have the characteristics of short span, large cross-section, and high rigidity of the walls connected with the connecting beams. Generally, under the action of wind load and earthquake, the internal force of the connecting beams is very large. Therefore, extreme natural disasters such as earthquakes can damage connecting beams.

In order to reinforce and repair broken connecting beams, a method of attaching fiber composite materials and attaching steel plates is usually adopted.
A U-shaped hoop + still bead + wall screw method was adopted, and the U-shaped hoop was attached in a direction perpendicular to the axis of the connecting beam. However, if an extreme natural disaster such as an earthquake reoccurs, the connecting beams will need to be reinforced and repaired again, causing many troubles such as the difficulty of construction and the amount of work for workers in earthquake-prone areas.

According to the force analysis of the connecting beams, when the connecting beams are exposed to extreme natural disasters such as earthquakes, most of the damage area is the central energy dissipation section segment, and the seismic strength of the parts of the connecting beams close to both sides and walls are high and the connecting beams in these sections are close to the wall, making them non-energy dissipative segments and less susceptible to damage.

In order to solve the above technical problems, the present invention provides a structure and reinforcement method for partially cutting and reinforcing connecting beams destroyed by earthquakes.

The technical solution of the present invention provides a reinforcing structure for partially cutting connecting beams broken by earthquakes,
The energy-dissipating segment of the middle part of the connecting beam destroyed by the earthquake is cut off, and the length of the cut-off connecting beam of the middle part is generally compatible with the damper size of 400-700mm, and the connecting beam residual stage of the non-energy-dissipating segments at both ends and inserting a reinforcing structure in the connecting beam residual stage to reinforce the structure, the reinforcing structure comprising a frame body, a transmission component and a fastening component;
The frame body includes two sets of annular brackets provided in the front and rear and a plurality of sets of slide groove members provided around the two sets of annular brackets at equal intervals, and is connected to a damper on the front end surface of the frame body. further provided with a connecting plate, further provided with a spherical hinge support on said connecting plate and connected with the damper;
The transmission component includes two sets of V-shaped rods, a bottom connecting piece and an anti-skid pad piece symmetrically provided on both sides of the slide groove member, the outer ends of the V-shaped rods being the inner walls of the slide groove member groove body. and a rotating shaft, the inner end of the V-shaped rod is slidably connected to the inner wall slide groove of the slide groove member groove body, and the V-shaped rod is hinged through the connecting part The non-slip pad piece is provided below the bottom connection piece and contacts the connecting beam residual step to prevent slipping. The pad piece is detachably connected to the bottom connecting piece via a bolt,
The fastening component includes a fastening pull ring provided inside two sets of V-shaped rods, respectively, and a plurality of sets of self-tightening bolts equally spaced in the circumferential direction, wherein the fastening pull rings are respectively provided on each V-shaped rod. is connected to the inner end of the self-tightening bolt through a sliding push block, the sliding push block is connected to a V-shaped rod and slidably connected to the slide groove member, and the bolt inner end of the self-tightening bolt is tightened. A spring for pulling the bolt is provided between the fitting groove provided at the position corresponding to the pull ring, and the bolt outer end of the automatic tightening bolt penetrates the annular bracket and is connected to the nut of the automatic tightening bolt. .
Due to the structural design of the above reinforcing structure, whether the connecting beam residual step is reinforced or not, the reinforcing and fastening process can be favorably applied to the connecting beam residual step, and the reinforcing structure has a self-tightening effect, so that it can be used for a long time. As well as avoiding loosening, it is easy to disassemble and reuse, and when an earthquake reoccurs, it can be quickly removed and repaired and reinforced again for the residual stage of the connecting beam. Due to its self-compensating action, the service life of the reinforced connection is significantly increased and it is easy to repair and maintain.

In addition, the anti-skid pad strip is made of hard rubber or steel plate, and according to the gap size of the reinforcing structure and the connecting beam residual step, the anti-skid pad strip with different thickness is selected, and the anti-skid pad strip and the connecting beam residual A non-slip pattern is further provided on one side contacting with the step, the frame body is manufactured by integral molding method or welding molding method, and the fastening pull ring and sliding push block are connected by bolts or welding. According to the exchange and connection method of the anti-skid pad strips, different thickness of the anti-skid pad strips can be selected according to the actual specification of the residual stage of the connecting beam, so as to enhance the applicability of the reinforcement structure, and at the same time, the frame body of the present invention. provides various processing methods according to its structure, and different processes can be selected according to actual production needs.

Another technical solution of the present invention is that the damper is a variable damper with a specific adjustable damping coefficient, and the variable damper is provided between connecting beam residual stages at both ends, each of which has a corresponding Connected to the spherical hinge support of one side connection plate, the variable damper comprises an upper support, a lower support and a piston and a piston rod provided on the upper support and compounded with the lower support, the piston through the piston rod connected to the inner top surface of the upper support, the piston including a piston outer shell and a piston inner shell;
The piston shell has a cylindrical boss structure with a large upper portion and a small lower portion, and the upper and lower end surfaces thereof are densely provided with passage holes for sludge and the like. Passing holes such as
A first orifice plate and a second orifice plate are provided in correspondence with the upper and lower end surfaces of the inner shell of the piston and the upper and lower end surfaces of the outer shell of the piston, respectively. is provided, and the first orifice plate and the second orifice plate are fixed to the flange of the piston inner shell through a plurality of sets of spring expansion and contraction rods that compensate for the gap with the piston outer shell provided in the circumferential direction. The side wall of the piston inner shell is provided with oblique threads at equal intervals in the circumferential direction, and the inner wall of the piston outer shell is rotated together with the oblique threads at a position corresponding to the position of the piston inner shell. and a hole in the side wall of the piston inner shell that mates with a hole in the side wall of the lower cylindrical portion of the piston outer shell,
An internal rod is installed at the center of the piston inner shell and abutted against the piston rod, the lower end of the internal rod is fixedly connected to the inner wall of the piston inner shell via a fixed rod, and the upper end of the internal rod is below the piston rod. It is slidably connected to a sink groove disposed on the end face, and an elevating motor is provided in the sink groove and is fixedly connected to the rotating piece at the upper end of the inner rod via the output shaft of the elevating motor.

Through the structural design of the above variable damper, through the short stroke lifting operation of the lifting motor, the passage amount of the piston hole can be controlled, and the damping coefficient can be variably adjusted. The damping coefficient of the variable damper can be adjusted according to the vibration conditions.

Additionally, the variable damper adds a pressure sensor and a position controller at the connection with the connecting beam residual stage to implement dynamic adjustment commands to the variable damper's lift motor. The addition of a pressure sensor and a controller can execute dynamic adjustment commands to the variable damper's lifting motor, automatically adjusting the variable damper's damping coefficient, etc. according to different vibration conditions.

A reinforcement method for a reinforcement structure with partially cut connecting beams destroyed by an earthquake includes the following steps:
Step 1 of partially severing the connecting beam broken by the earthquake;
The energy dissipating segment in the intermediate portion of the connecting beam destroyed by the earthquake is cut, and the ratio of the cut intermediate portion to the total length of the connecting beam is 0.25 to 0.5, and the non-energy dissipating segments at both ends of the connecting beam residual stages withhold the
step 2 of reinforcing the connecting beam residual stage;
treating the cracks at the ends of the connecting beam residual step, reinforcing the connecting beam residual step, and then fitting and adding a self-clamping reinforcement structure to each of the two sets of connecting beam residual step;
step 3 of adding a damper;
Both ends of the damper are fixed with the corresponding end faces of the reinforcing structure, that is, the process of partially cutting and reinforcing the connecting beams destroyed by the earthquake is completed.

Further, the reinforcement treatment of the connecting beam residual stage adopts any of high ductility concrete reinforcement, carbon fiber cloth reinforcement, or stuck steel plate reinforcement. By the above reinforcement scheme, the damaged non-energy dissipating segments of the connecting beams are preferably repaired, and the structural strength of the connecting beam residual steps is repaired and improved.

In addition, the damper adopts a metal composite damper, but is not limited to this, and can be other dampers with the same mitigation effect, shock absorbing device or energy dissipating device, etc. Before starting step 2 , The connecting steel plate for connecting the damper is pre-embedded in the residual step end of the connecting beam. By connecting the damper by embedding the connecting steel plate in advance,
It is possible to connect the damper and the connecting beam residual stage at low cost and obtain the connection strength that meets the construction method needs.

Beneficial effects of the present invention are as follows:
(1) The reinforcement method of the present invention reinforces the connecting beam residual stage into a connecting beam with good energy dissipation performance, and suitably solves the problem of repairing the destruction of the connecting beam due to an earthquake, etc., and when the earthquake reoccurs. , the damper can be replaced without reinforcement, which is easy to install and saves time and energy.
(2) The reinforcing method of the present invention adds a reinforcing structure to quickly reinforce the residual stage of the connecting beam, and suitably reinforce and fasten the residual stage of the connecting beam, and the reinforcing structure has a self-tightening effect. , avoiding situations such as loosening due to long-term use, at the same time being easy to disassemble and reuse, significantly increasing the service life of the reinforced connection and facilitating repair and maintenance.
(3) The reinforcement method of the present invention realizes variable adjustment of the damping coefficient by adding a variable damper. can adjust the damping coefficient of the variable damper according to different vibration conditions to optimize the seismic effect of the energy dissipating segment.

1 is a schematic diagram of the structure of a reinforcing method according to Embodiment 1 of the present invention; FIG. FIG. 1 is a structural schematic diagram of the reinforcement structure of Embodiment 1 of the present invention; FIG. 2 is a schematic diagram 2 of the structure of the reinforcement structure of Example 1 of the present invention; 1 is a schematic diagram of a frame body structure of a reinforcing structure of Embodiment 1 of the present invention; FIG. 1 is a schematic diagram of the transmission component structure of the reinforcement structure of Embodiment 1 of the present invention; FIG. 1 is a schematic diagram of the fastening component structure of the reinforcement structure of Embodiment 1 of the present invention; FIG. 1 is a schematic diagram of the self-tightening bolt structure of the fastening component of Embodiment 1 of the present invention; FIG. FIG. 4 is a schematic diagram of the structure of the reinforcement method of Embodiment 2 of the present invention; It is a schematic diagram of the internal structure of the variable damper of Example 2 of this invention. FIG. 4 is an exploded view of the upper support structure of the variable damper according to Embodiment 2 of the present invention; FIG. 4 is a schematic diagram of the piston shell structure of the piston of Example 2 of the present invention; FIG. 5 is an exploded view of the piston inner shell structure of the piston of Example 2 of the present invention; FIG. 4 is a schematic diagram of the structure of the reinforcing method of embodiment 3 of the present invention; FIG. 4 is a schematic diagram of the structure of the reinforcing method of embodiment 4 of the present invention; FIG. 5 is a schematic diagram of the structure of the reinforcement method of Example 5 of the present invention;

[Description of symbols]
1 connecting beam residual step 2 damper 3 reinforcing structure 31 frame body 311 annular bracket 312 sliding groove member 313 connecting plate 314 spherical hinge support 32 transmission component 321 V-shaped rod 322 bottom connecting piece 323 non-slip pad piece 324 rotating member 325 slot 326 Sliding push block 33 Fastening component 331 Fastening pull ring 332 Self-tightening bolt 333 Fitting groove 334 Spring 4 Variable damper 41 Upper support 42 Lower support 43 Piston 431 Piston outer shell 432 Piston inner shell 433 First orifice plate 434 Second Orifice plate 435 Spring telescopic rod 436 Diagonal thread 437 Thread groove 438 Internal rod 439 Elevating motor 44 Piston rod 5 Connecting steel plate

Example 1
As shown in Figures 2 and 3, the reinforcing structure 3 includes three parts: a frame body 31, a transmission component 32 and a fastening component 33, specifically including:
1) Frame body 31
As shown in FIGS. 2, 3, and 4, the frame body 31 includes two sets of annular brackets 311 provided in the front and rear and a plurality of sets of slide groove members 312 provided around the two sets of annular brackets 311 at equal intervals. a connection plate 313 for connecting the damper 2 to the front end surface of the frame body 31 is further provided; the connection plate 313 is further provided with a spherical hinge support 314 for connecting the damper 2; or manufactured by the welding forming method,
2) Transmission component 32
As shown in FIGS. 2, 3 and 5, the transmission component 32 includes two sets of V-shaped rods 321, a bottom connecting piece 322 and a non-slip pad piece 323 symmetrically provided on both sides of the sliding groove member 312, and the V The outer end of the V-shaped rod 321 is fixedly and rotatably connected to the inner wall of the slide groove member 312 groove body through a rotating shaft, and the inner end of the V-shaped rod 321 slides in the slide groove on the inner wall of the slide groove member 312 groove body. Possibly connected, the V-shaped rod 321 passes through a slot 325 located in the bottom connecting piece 322 via a hinged rotating member 324 via a connection.
A non-slip pad piece 323 is provided below the bottom connection piece 322 to contact the connecting beam residual step 1, and the non-slip pad piece 323 can be attached to and detached from the bottom connection piece 322 through bolts. , the non-slip pad strip 323 adopts commercially available Q460 steel plate, and the thickness of the non-slip pad strip 323 is different according to the gap size between the reinforcing structure 3 and the connecting beam residual step 1
can be selected, and a non-slip pattern is further provided on one side of contact between the non-slip pad piece 323 and the connecting beam residual step 1, and the actual connecting beam residual step can be changed by replacing and connecting the non-skid pad piece 323. Add anti-skid pad strips 323 of different thickness according to the specifications of 1 to increase the applicability of the reinforcing structure 3;
3) fastening component 33
As shown in FIGS. 2, 3, 6 and 7, the fastening components 33 each include two sets of fastening pull rings 331 provided inside the V-shaped rods 321 and a plurality of sets of automatic pull rings 331 equally spaced circumferentially. Including a tightening bolt 332, a tightening pull ring 331 is respectively connected to the inner end of each V-shaped rod 321 through a sliding push block 326, the tightening pull ring 331 and the sliding push block 326 are connected by welding, and sliding. A dynamic push block 326 is connected to the V-shaped rod 321 and slidably connected to the slide groove member 312, and the inner end of the automatic tightening bolt 332 is provided at a position corresponding to the position of the fastening pull ring 331. A spring 334 is provided between the grooves 333 to pull the bolt, and the bolt outer end of the automatic tightening bolt 332 passes through the annular bracket 311 and is connected to the nut of the automatic tightening bolt 332 .
Due to the structural design of the reinforcing structure 3, although the connecting beam residual step 1 is reinforced, the connecting beam residual step 1 is preferably reinforced and fastened, and the reinforcing structure 3 has a self-tightening effect, so that it can be used for a long time. It is easy to disassemble and reuse, and when an earthquake occurs again, the connecting beam residual stage 1 can be quickly removed and repaired and reinforced again, and the reinforced structure 3 can be reused and loosened gaps. , thereby significantly increasing the life of the reinforced connection and facilitating repair and maintenance.
The reinforcing method of the above reinforcing structure 3 is to select the anti-skid pad piece 323 with appropriate thickness according to the width and thickness of the connecting beam residual step 1, and secure the anti-skid pad piece 323 to the bottom connecting piece by four sets of bolts. Tighten to the bottom of the 322,
The reinforcing structure 3 is fitted on the connecting beam residual step 1, the nuts of the automatic tightening bolts 332 are tightened, and the tightening of the automatic tightening bolts 332 pulls the corresponding tightening pull ring 331 to move it outward, and pushes the tightening pull ring 331. action moves the sliding push block 326 of each transmission component 32 outwardly along the sliding channel member 312;
The V-shaped rod 321 is pushed, and the V-shaped rod 321 gathers inside and pushes downward the bottom connection piece 322 connected to the rotating member 324. During this time, the rotating member 324 and the slot 325 slide laterally. compensate for the displacement and increase the pushing force from the non-slip pad piece 323 to the connecting beam residual step 1;
During the holding period, the springs 334 placed in each clamped pull ring 331 are compressed during the clamping process, and when the connection is loosened, the elastic force of each spring 334 recovers to perform the automatic clamping action.

As shown in Fig. 1, the method for reinforcement of partial cuts of connecting beams destroyed by earthquakes includes the following steps:
Step 1 of partially severing the connecting beam broken by the earthquake;
Cut the energy-dissipating segment of the middle part of the connecting beam destroyed by the earthquake, the cut-off middle part is 600 mm, and retain the connecting beam residual stage 1 of the two-end non-energy-dissipating segment;
a step 2 of reinforcing the connecting beam residual stage 1;
repairing cracks at the ends of the connecting beam residual step 1 using commercially available high ductility concrete;
then add two sets of connecting beam residual steps 1 respectively fitted into the reinforcing structure 3;
step 3 of adding a damper 2;
The damper 2 is a commercially available metal composite damper, and both ends of the damper 2 and the corresponding end faces of the connecting beam residual step 1 are fixed, that is, the process of partially cutting and reinforcing the connecting beam broken by the earthquake is completed.

Example 2
Although substantially the same as Example 1, the reinforcement method of this example is the same as Example 1 except for the following, and the dampers used are different, and as shown in FIG. The damper provided is a variable damper 4, and the variable damper 4 is provided between the connecting beam residual stages 1 at both ends, and both ends thereof are respectively connected to the spherical hinge support 314 of the corresponding one-side connecting plate 313;
As shown in FIGS. 9 and 10, the variable damper 4 includes an upper support 41, a lower support 42, and a piston 43 and a piston rod 44 provided on the upper support 41 and compounded with the lower support 42, the piston 43 and the piston rod 44. connected to the inner top surface of the upper support 41 via the piston 43 includes a piston outer shell 431 and a piston inner shell 432;
As shown in FIG. 11, the piston outer shell 431 has a cylindrical boss structure with a large upper portion and a small lower portion. The side wall of the cylindrical part of the is also provided with passage holes such as sludge,
As shown in FIG. 12, the piston inner shell 432 is a vertically communicating ring-shaped cylinder, and the upper and lower end faces of the piston inner shell 432 are combined with the upper and lower end faces of the piston outer shell 431 correspondingly. An orifice plate 433 and a second orifice plate 434 are provided. The first orifice plate 433 and the second orifice plate 434 are provided in the circumferential direction, respectively, for compensating for the gap with the piston shell 431 . It is fixedly connected to the flange of the piston inner shell 432 via the telescopic rod 435, and the side wall of the piston inner shell 432 is provided with oblique threads 436 at equal intervals in the circumferential direction to connect the inner wall of the piston outer shell 431 and the piston inner shell. A thread groove 437 is provided at a location corresponding to the position of 432 for blending with the oblique thread 436 to rotate, and is provided on the side wall of the piston inner shell 432 and on the side wall of the lower cylindrical portion of the piston outer shell 431. The piston rod 4 is located at the center of the piston inner shell 432.
4, the lower end of the internal rod 438 is fixedly connected to the inner wall of the piston inner shell 432 via the fixed rod, and the upper end of the internal rod 438 is arranged on the lower end surface of the piston rod 44. A lifting motor 439 is provided in the sink groove, and the output shaft of the lifting motor 439 is fixedly connected to the rotating piece at the upper end of the internal rod 438.
In the meantime, the variable damper 4 can perform dynamic adjustment commands to the lift motor 439 of the variable damper 4 by adding a pressure sensor and a position controller at the connection of the connecting beam residual stage 1 . The addition of a pressure sensor and controller can execute dynamic adjustment commands to the variable damper's lifting motor to automatically adjust the variable damper's damping coefficient, etc. according to different vibration conditions.
Due to the structural design of the variable damper 4, the passage amount of the piston 43 through the hole can be controlled according to the short stroke lifting operation of the lifting motor 439, and the damping coefficient can be variably adjusted. Alternatively, the addition of pressure sensors and controllers can execute dynamic adjustment commands to the variable damper 4 to adjust the damping coefficient, etc. of the variable damper 4 according to different vibration conditions.
The operation principle of the damping adjustment of the variable damper 4 is as follows: the variable damper 4 is dynamically adjusted by an external commercial single-chip microcomputer, and the connection between the reinforcing structure 3 and the connecting beam residual stage 1 is subjected to a commercially available pressure By adding a sensor, by remote signal transmission or cable data transmission, it is connected with a commercially available single-chip microcomputer, and at the same time, the commercially available single-chip microcomputer is connected with the lifting motor 439 of the variable damper 4 through a commercially available relay. , over time, the lift motor 439 was reconfigured to mount a commercially available lift motor inside the piston rod 44,
When the damping coefficient needs to be adjusted, the lift motor 439 rises, causing the inner rod 438 to move up and thus the piston inner shell 432 under the connection of the inner rod 438 to move up,
Since it is compounded with the piston shell 431 via the oblique thread 436 and the thread groove 437 , it makes a small rotation when it rises, and the first orifice plate 433 and the second orifice plate 434 are each aligned with the corresponding piston shell 431 . Partially misaligned with the holes on the top and bottom faces,
As the piston inner shell 432 rises, the hole provided in the side wall of the piston outer shell 431 is also partially displaced, thereby adjusting the size of the hole in the piston 43.
At the same time, after the piston inner shell 432 rises, the movement distance is compensated by the spring extension rods 435 provided at the top and bottom to maintain contact between the first orifice plate 433 and the upper end surface of the piston outer shell 431, and the second maintain contact between the orifice plate 434 and the lower end surface of the piston outer shell 431 .

Example 3
As shown in Figure 13, a method for partially cutting and reinforcing an earthquake-damaged connecting beam, comprising the following steps:
Step 1 of partially severing the connecting beam broken by the earthquake;
Cut the energy-dissipating segment of the middle part of the connecting beam destroyed by the earthquake, the cut-off middle part is 600 mm, and retain the connecting beam residual stage 1 of the two-end non-energy-dissipating segment;
a step 2 of reinforcing the connecting beam residual stage 1;
A connecting steel plate 5 for connecting the damper 2 is installed in advance at the end of the connecting beam residual step 1, and the connecting steel plate 5 adopts a commercially available Q460 steel plate. Rehabilitate using high ductility concrete and reinforce connecting beam residual step 1 using commercial high ductility concrete;
step 3 of adding a damper 2;
The damper 2 adopts a commercially available metal composite damper, and the two ends of the damper 2 and the corresponding end faces of the connecting beam residual step 1 are fixed, that is, the connecting beams destroyed by the earthquake are partially cut and reinforced. .

Example 4
As shown in Figure 14, a method for partially cutting and reinforcing an earthquake-broken connecting beam includes the following steps:
Step 1 of partially severing the connecting beam broken by the earthquake;
Cut the energy-dissipating segment of the middle part of the connecting beam destroyed by the earthquake, the cut-off middle part is 600 mm, and retain the connecting beam residual stage 1 of the two-end non-energy-dissipating segment;
a step 2 of reinforcing the connecting beam residual stage 1;
A connecting steel plate 5 for connection with the damper 2 is pre-embedded at the end of the connecting beam residual step 1, and the connecting steel plate 5 adopts a commercially available Q460 steel plate. Rehabilitate using high ductility concrete and reinforce connecting beam residual step 1 using commercially available carbon fiber cloth.
step 3 of adding a damper 2;
The damper 2 adopts a commercially available metal composite damper, and the two ends of the damper 2 and the corresponding end faces of the connecting beam residual step 1 are fixed, that is, the connecting beams destroyed by the earthquake are partially cut and reinforced. .
Example 5
As shown in FIG. 15, a method for partially cutting and reinforcing an earthquake-damaged connecting beam includes the following steps:
Step 1 of partially severing the connecting beam broken by the earthquake;
Cut the energy-dissipating segment of the middle part of the connecting beam destroyed by the earthquake, the cut-off middle part is 600 mm, and retain the connecting beam residual stage 1 of the two-end non-energy-dissipating segment;
a step 2 of reinforcing the connecting beam residual stage 1;
A connecting steel plate 5 for connection with a damper 2 is embedded in advance at the end of the connecting beam residual step 1, and the cracks at the end of the connecting beam residual step 1 are repaired using commercially available high ductility concrete and connected. The beam residual step 1 is reinforced using affixed steel plates, and the steel plates and connecting steel plates 5 are commercially available Q
460 steel plate is adopted, 4 steel plates are respectively installed on the 4 sides of the connecting beam residual stage 1, and 5 steel ropes are used for reinforcement;
step 3 of adding a damper 2;
The damper 2 adopts a commercially available metal composite damper, and the two ends of the damper 2 and the corresponding end faces of the connecting beam residual step 1 are fixed, that is, the connecting beams destroyed by the earthquake are partially cut and reinforced. .
Seismic Simulated Test Test 1 after Reinforcement and Repair of Connecting Beam To examine the effect of installing different dampers on the seismic resistance of the connecting beam.
Specific measurement data are shown in Table 1 by the same test method as
Table 1 Examples 1 and 2 Seismic simulation test data after reinforcing and repairing connecting beams

Test conclusion:
As can be seen from the data in Table 1 above, the stiffening treatment of the connection beam using the variable damper 4 results in the reinforcement treatment of the connection beam using the variable damper 4, followed by the treatment of the connection beam, as can be seen from the comparison of the data. Compared to Example 1, the arc degree of the limit connection beam was improved to some extent, that is, the seismic performance was improved. Its seismic performance was superior to that of Example 1 due to faster recovery speed.
Test 2 Investigating the effect of different connecting beam residual stage reinforcement methods on the connecting beam seismic resistance We conducted a seismic simulation test for the reinforcing methods provided in Examples 1 and 3 to 5, respectively, and set up a dedicated load system for earthquakes. , each increasing the connecting beam radiance until the first failure occurs in the connecting beam, recording its recovery time, then removing and replacing the energy dissipating segment, maintaining the connecting beam radiance when replacing. , the load simulation is performed again for the exchanged connection beam, increased to 0.020 rad, then stopped, and after it recovers, the connection beam is increased at a rate of 0.002 rad/min. The beam was loaded until the second break occurred and specific measurement data are shown in Table 2:
Table 2 Examples 1 and 3 to 5 Seismic resistance simulation test data after reinforcing and repairing connecting beams

Test conclusion:
1) As can be seen from the data in Table 2 above, in the first destructive test, there was no significant difference in the effects of Examples 3 to 5, and only the reinforcement treatment method of the connecting beam residual stage 1 was different, and the second destructive test In the test, the reinforcement method with steel plate is almost the same as the critical joint beam radius of the first failure, with a difference of only 0.02 rad, and the reinforcement method with carbon fiber cloth has an intermediate value, and the Since the deviation of the difference is relatively maximized in the reinforcement method by the method, the difference in the reinforcement method for the connection beam residual stage 1 has a certain influence on the seismic strength of the connection beam, and the effect of the first embodiment is greater than that of the third to fifth embodiments. is the best,
2) As can be seen from the comparison between Example 5 and Example 1, the connection beam residual step 1 due to the reinforcing structure 3
As can be seen from the comparison of the data, the reinforcement treatment for the connecting beam after the connecting beam residual step 1 is treated by the reinforcing structure 3 has a certain degree of improvement in the limit connecting beam radius compared to the fifth embodiment, that is, the seismic performance is improved. Observing the second destructive test, there is no difference from the first time, and the impact of the connecting beam residual stage 1 on the entire structure of the connecting beam on the earthquake resistance is eliminated.

Claims (7)

Cut off the energy-dissipating segment in the middle part of the connecting beam destroyed by the earthquake, reserve the connecting beam residual stage (1), which is a non-energy-dissipating segment at both ends, and connect the beam residual stage (
A reinforcing structure in which a reinforcing structure (3) is fitted in 1),
said reinforcing structure (3) comprises a frame body (31), a transmission component (32) and a fastening component (33);
The frame body (31) consists of two sets of annular brackets (311) provided in the front and rear and a plurality of sets of slide groove members (3) provided around the two sets of annular brackets (311) at equal intervals.
12), a connection plate (313) connected to the damper (2) is further provided on the front end surface of the frame body (31), and the connection plate (313) is connected to the damper (2) A spherical hinge support (314) is provided,
Said transmission component (32) consists of two sets of V-shaped rods (321) symmetrically provided on both sides of the slide groove member (312), a bottom connecting piece (322) and an anti-slip pad piece (32).
3), wherein the outer end of the V-shaped rod (321) is fixedly and rotatably connected to the inner wall of the groove of the slide groove member (312) through a rotating shaft, and the inner end of the V-shaped rod (321) is The V-shaped rod (32) is slidably connected to the slide groove on the inner wall of the groove of the slide groove member (312).
1) is slidably connected with a slot (325) located in said bottom connecting piece (322) through a rotating member (324) hingedly connected through a connection, said non-slip pad piece; (323) is provided below the bottom connecting piece (322) to contact the connecting beam residual step (1), and the non-slip pad piece (323) is detachably connected with the bottom connecting piece (322) through bolts. is,
Said fastening component (33) comprises fastening pull rings (331) respectively provided inside two sets of V-shaped rods (321), and multiple sets of self-tightening bolts (332) equally spaced in the circumferential direction. wherein the fastening pull ring (331) is respectively connected with the inner end of each V-shaped rod (321) through a sliding push block (326), wherein the sliding push block (326) is connected to the V-shaped rod (321) and slidably connected to the slide groove member (312), and the inner end of the automatic tightening bolt (332) is provided corresponding to the position of the fastening pull ring (331). A spring (334) is provided between (333) to pull the bolt, and the bolt outer end of the self-tightening bolt (332) passes through the annular bracket (311) and is connected with the self-tightening bolt (332) nut.
A reinforcement structure obtained by partially cutting a connection beam destroyed by an earthquake. The non-slip pad strip (323) is made of hard rubber or steel plate, and the thickness of the non-slip pad strip (323) is selected according to the size of the gap between the reinforcing structure (3) and the connecting beam residual step (1). In addition, a non-slip pattern is further provided on one side of the non-slip pad piece (323) contacting the connecting beam residual step (1), and the frame body (31) adopts the integral molding method or the welding molding method. and the fastening pull ring (331) and the sliding push block (326) are connected by means of bolts or welding.
reinforced structure as described in . Said damper (2) is a variable damper (4) with an adjustable damping coefficient, said variable damper (4) is arranged between the connecting beam residual stages (1) at both ends, each end of which is connected to the corresponding side Connected to the spherical hinge support (314) of the plate (313), said variable damper (4) comprises an upper support (41), a lower support (42) and an upper support (41)
A piston (43) and a piston rod (
44), said piston (43) through the piston rod (44) to the upper support (
41), the piston (43) comprising a piston outer shell (431) and a piston inner shell (432);
The piston outer shell (431) has a cylindrical boss structure with a large upper portion and a small lower portion. A passage hole for sludge is provided,
The piston inner shell (432) is an annular cylindrical body that communicates vertically, and has a first orifice plate (433) and a second orifice plate on its upper and lower end faces corresponding to the upper and lower end faces of the piston outer shell (431). (434), said first orifice plate (433);
The second orifice plate (434) is attached to the flange of the piston inner shell (432) via spring telescopic rods (435) that compensate for the clamping clearances with the plurality of sets of piston outer shells (431) respectively arranged in the circumferential direction. fixedly connected, the side wall of said piston inner shell (432) is provided with oblique threads (436) equidistantly in the circumferential direction, said piston outer shell (431) inner wall at the position of the piston inner shell (432) A thread groove (437) is provided at a corresponding location to cooperate with the oblique thread (436) to rotate, and a hole in the side wall of the lower cylindrical portion of the piston outer shell (431) on the side wall of the piston inner shell (432). A hole is provided corresponding to the position of
Inner rod (4) abutting piston rod (44) in the center of said piston inner shell (432)
38), the lower end of said inner rod (438) is fixedly connected to the inner wall of the piston inner shell (432) through a fixed rod, and the upper end of the inner rod (438) is below the piston rod (44). It is slidably connected to a sink groove arranged on the end face, and an elevating motor (439) is provided in the sink groove and fixed to the rotating piece at the upper end of the inner rod (438) through the output shaft of the elevating motor (439). 2. The reinforcing structure according to claim 1, characterized in that it is symmetrically connected. Said variable damper (4) provides dynamic adjustment commands to the lift motor (439) of the variable damper (4) by adding a pressure sensor and a position controller at the connection with the connecting beam residual stage (1). 2. The reinforcement structure of claim 1, wherein: A reinforcing method for a reinforcing structure according to claim 1,
The energy-dissipating segment in the middle part of the connection beam destroyed by the earthquake is cut, and the ratio of the cut-out middle part to the total length of the connection beam is 0.25 to 0.5, and the connection beam residual stages of the non-energy-dissipating segments at both ends ( suspending 1), step 1 of partially severing the connecting beams destroyed by the earthquake;
Treating cracks at the ends of the connecting beam residual step (1), reinforcing the connecting beam residual step (1),
a step 2 of reinforcing the connecting beam residual steps (1) by subsequently fitting and adding a self-clamping reinforcing structure (3) to each of the two sets of connecting beam residual steps (1);
Step 3 of adding the damper (2), fixing both ends of the damper (2) and the corresponding reinforcement structure (3) end faces to complete the process of partially cutting and reinforcing the earthquake-damaged connecting beam;
A reinforcement method comprising: The reinforcement treatment of the connecting beam residual stage (1) includes high ductility concrete reinforcement, carbon fiber cloth reinforcement,
6. The method according to claim 5, characterized in that either method of sticking steel plate reinforcement is adopted. Said damper (2) adopts a metal composite damper, and pre-embeds a connecting steel plate (5) for connecting the damper (2) at the end of the connecting beam residual stage (1) before step 2 starts ,
6. The method of claim 5, wherein:

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