CN113550444A

CN113550444A - Assembled shear connector

Info

Publication number: CN113550444A
Application number: CN202110987095.0A
Authority: CN
Inventors: 张玉杰; 杨智诚; 吴全科; 杨永民; 邱剑辉
Original assignee: Zhongkai University of Agriculture and Engineering
Current assignee: Zhongkai University of Agriculture and Engineering
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2021-10-26

Abstract

The invention discloses an assembled shear connector, wherein a limiting block is welded at the bottom of an I-beam, a limiting groove is formed in the top of a connecting plate, the limiting block is inserted into the limiting groove, a first through hole is formed in the connecting plate, a second through hole is formed in the I-beam, a first fastening bolt sequentially penetrates through the first through hole, the second through hole and an outer nut, the first fastening bolt is in threaded connection with the outer nut, one end of a supporting plate is embedded in a concrete beam, the other end of the supporting plate is welded at the bottom of the connecting plate, two reset mechanisms are respectively arranged on two sides of the supporting plate, one end of each reset mechanism is fixed on the concrete beam, and the other end of each reset mechanism is fixedly connected with the connecting plate. When the concrete beam slides relatively, the limiting block is used for bearing transverse shearing force, so that the shearing force borne by the first fastening bolt is reduced, and the shearing resistance of the connecting piece is obviously improved.

Description

Assembled shear connector

Technical Field

The invention relates to the technical field of building structure connecting pieces, in particular to an assembly type shear connector.

Background

The steel-concrete combined structure has the advantages of high bearing capacity, good stability, convenience in construction and the like, the utilization rate in the current building construction is higher and higher, and the section steel and the concrete are combined into a whole to work together by arranging different types of shear connectors.

In traditional construction, adopt bolted connection form built-up connection steel frame roof beam and precast concrete shear force wall usually, this kind of mode is through being in the same place steel sheet connecting piece and girder steel welding to adopt high strength bolt horizontal connection with the pre-buried steel sheet in the precast concrete shear force wall, but this kind of mode has following problem: when the shear wall slides relative to the steel frame beam, the transverse shear force is resisted only by the bolts, the bolts are easily broken, and the shear resistance is poor.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an assembly type shear connector, when concrete beams slide relatively, a limiting block is used for bearing transverse shear force, so that the shear force borne by a first fastening bolt is reduced, and the shear capacity of the connector is obviously improved.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an assembled shear connector, including the I-beam, the stopper, the connecting plate, a supporting plate, first fastening bolt, outer nut, concrete beam and canceling release mechanical system, the stopper welds in the I-beam bottom, the spacing groove has been seted up at the connecting plate top, the stopper is pegged graft in the spacing inslot, first through-hole has been seted up on the connecting plate, the second through-hole has been seted up on the I-beam, first fastening bolt passes first through-hole in proper order, second through-hole and outer nut, and first fastening bolt and outer nut threaded connection, the one end of backup pad inlays in the concrete beam, the other end of backup pad welds in the connecting plate bottom, two canceling release mechanical systems set up respectively in the both sides of backup pad, and canceling release mechanical system's one end is fixed in on the concrete beam, canceling release mechanical system's the other end and connecting plate fixed connection.

In a preferred technical scheme of the invention, L-shaped base plates are symmetrically arranged on two sides of the supporting plate and are simultaneously abutted against the connecting plate and the supporting plate, one end of each L-shaped base plate is fixedly connected with the connecting plate through a first fastening bolt, and the other end of each L-shaped base plate is fixedly connected with the supporting plate through a second fastening bolt.

In a preferred technical scheme of the invention, the resetting mechanism comprises a fixed block, a third fastening bolt, a piston plate, a piston rod, a first disc spring, a sliding block, a second disc spring and a speed reducing mechanism, the fixed block is fixed on the concrete beam through the third fastening bolt, a hydraulic cavity is formed in the fixed block, the piston plate is connected in the hydraulic cavity in a sliding manner, the piston plate is fixedly connected with the bottom wall of the hydraulic cavity through the first disc spring, a third through hole is formed above the fixed block, the piston rod is connected in the third through hole in a sliding manner, one end of the piston rod is fixedly connected with the piston plate, the other end of the piston rod extends to the position above the fixed block and is fixedly connected with the connecting plate, a sliding cavity is formed in one side of the hydraulic cavity, the sliding block is connected in the sliding cavity in a sliding manner, the sliding block is connected with the side wall of the sliding cavity through the second disc spring, a pressure relief hole is further formed in the side of the sliding cavity, a hydraulic pipeline is formed in one side of the sliding cavity far away from the hydraulic cavity, and the sliding cavity is communicated with the hydraulic cavity through a hydraulic pipeline, a speed reduction cavity is formed above the hydraulic cavity and is communicated with the third through hole through a sliding hole, the speed reduction mechanism is arranged in the speed reduction cavity, and the speed reduction mechanism is connected with the sliding block.

In a preferred technical scheme of the invention, the speed reducing mechanism comprises a rotating gear, a first rotating shaft, a first driving wheel, a second rotating shaft, a second driving wheel, a driving belt, a rotating disc, a push rod, a connecting rod and a rubber block, wherein a gear cavity is formed at the top of the sliding cavity, the rotating gear is rotationally connected to the side wall of the gear cavity and is meshed with the sliding block, a driving cavity is formed in one side of the sliding cavity, one end of the first rotating shaft is fixedly connected with the rotating gear, the other end of the first rotating shaft extends into the driving cavity and is fixedly connected with the first driving wheel, the rotating disc is rotationally connected to the side wall of the speed reducing cavity, one end of the second rotating shaft is fixedly connected with the rotating disc, the other end of the second rotating shaft extends into the driving cavity and is fixedly connected with the second driving wheel, the first driving wheel is in transmission connection with the second driving wheel through the driving belt, the rubber block is slidably connected in the sliding hole, and the push rod is fixedly arranged at one side of the rubber block, the other end of the push rod is hinged with the rotary table through a connecting rod.

In a preferred embodiment of the present invention, the support plate is preferably a shape memory alloy.

In a preferred technical scheme of the invention, the side wall of the connecting plate is provided with a grouting hole communicated with the limiting groove.

The invention has the beneficial effects that:

according to the assembly type shear connector provided by the invention, when the concrete beams slide relatively, the transverse shear force is borne by the limiting blocks, so that the shear force borne by the first fastening bolt is reduced, and the shear resistance of the connector is obviously improved.

Drawings

FIG. 1 is a schematic structural view illustrating an assembled shear connector according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a cross-sectional view taken in the direction B-B of FIG. 2;

fig. 4 is a top view of the connection plate.

In the figure:

1. an I-beam; 2. a limiting block; 3. a connecting plate; 4. a support plate; 5. a first fastening bolt; 6. an outer nut; 7. a concrete beam; 8. a reset mechanism; 801. a fixed block; 802. a third fastening bolt; 803. a piston plate; 804. a piston rod; 805. a first disc spring; 806. a slider; 807. a second disc spring; 808. a speed reduction mechanism; 8081. a rotating gear; 8082. a first rotating shaft; 8083. a first drive pulley; 8084. a second rotating shaft; 8085. a second transmission wheel; 8086. a transmission belt; 8087. a turntable; 8088. a push rod; 8089. a connecting rod; 80810. a rubber block; 80811. a gear cavity; 80812. a transmission cavity; 809. a hydraulic chamber; 810. a third through hole; 811. a slide chamber; 812. a hydraulic conduit; 813. a pressure relief vent; 814. a deceleration chamber; 815. a slide hole; 9. a limiting groove; 10. a first through hole; 11. a second through hole; 12. an L-shaped backing plate; 13. a second fastening bolt; 14. and (4) grouting holes.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1-4, an embodiment provides an assembly type shear connector, which includes an i-beam 1, a limiting block 2, a connecting plate 3, a supporting plate 4, a first fastening bolt 5, an outer nut 6, a concrete beam 7 and a reset mechanism 8, wherein the limiting block 2 is welded at the bottom of the i-beam 1, a limiting groove 9 is formed at the top of the connecting plate 3, the limiting block 2 is inserted into the limiting groove 9, a first through hole 10 is formed in the connecting plate 3, a second through hole 11 is formed in the i-beam 1, the first fastening bolt 5 sequentially passes through the first through hole 10, the second through hole 11 and the outer nut 6, the first fastening bolt 5 is in threaded connection with the outer nut 6, one end of the supporting plate 4 is embedded in the concrete beam 7, the other end of the supporting plate 4 is welded at the bottom of the connecting plate 3, the two reset mechanisms 8 are respectively arranged at two sides of the supporting plate 4, and one end of the reset mechanism 8 is fixed on the concrete beam 7, the other end of the resetting mechanism 8 is fixedly connected with the connecting plate 3. When the I-beam 1 and the concrete beam 7 slide relatively, the I-beam 1 drives the limiting block 2 to move, the limiting block 2 interacts with the limiting groove 9, and the limiting block 2 bears a transverse shearing force generated by sliding, because the shearing resistance of the steel material is increased along with the increase of the sectional area, and the sectional area of the limiting block 2 is larger than that of the first fastening bolt 5, the limiting block 2 can bear a larger shearing force compared with the first fastening bolt 5, so that the shearing resistance of the connecting piece is obviously improved, when the transverse shearing force borne by the limiting block 2 exceeds a certain value, the limiting block 2 drives the support plate 4 to incline and generate bending deformation through the connecting plate 3, so that the first fastening bolt 5 is prevented from being broken, and the service life of the first fastening bolt 5 is prolonged; simultaneously, backup pad 4 slopes to drive the slope of connecting plate 3, and then extrudees canceling release mechanical system 8, and canceling release mechanical system 8 plays the effect of auxiliary stay to connecting plate 3, prevents that backup pad 4 bending from excessively causing the fracture, and after the load disappeared, canceling release mechanical system 8 drives connecting plate 3 and backup pad 4 and resumes initial condition, has greatly improved spare part's life, has reduced the maintenance cost.

Specifically, the bilateral symmetry of backup pad 4 is provided with L shape backing plate 12, and L shape backing plate 12 simultaneously with connecting plate 3 and backup pad 4 butt, the one end of L shape backing plate 12 is through first fastening bolt 5 and connecting plate 3 fixed connection, the other end of L shape backing plate 12 passes through second fastening bolt 13 and backup pad 4 fixed connection. Through setting up L shape backing plate 12, can guarantee fastening connection between I-beam 1 and the connecting plate 3, avoid when first fastening bolt 5 is crooked, drive outer nut 6 extrusion connecting plate 3, and then cause connecting plate 3 to be crushed, cause I-beam 1 and the not hard up condition of connecting plate 3 connection, can play the effect of auxiliary stay connecting plate 3 again simultaneously, avoid 4 bending amplitude of backup pad too big,

cause connecting plate

3 and 4 welding departments of backup pad fracture, guarantee the intensity of connecting piece.

Specifically, the reset mechanism 8 includes a fixed block 801, a third fastening bolt 802, a piston plate 803, a piston rod 804, a first disc spring 805, a slider 806, a second disc spring 807 and a speed reduction mechanism 808, the fixed block 801 is fixed on the concrete beam 7 by the third fastening bolt 802, a hydraulic chamber 809 is formed in the fixed block 801, the piston plate 803 is slidably connected in the hydraulic chamber 809, the piston plate 803 is fixedly connected with the bottom wall of the hydraulic chamber 809 by the first disc spring 805, a third through hole 810 is formed above the fixed block 801, the piston rod 804 is slidably connected in the third through hole 810, one end of the piston rod 804 is fixedly connected with the piston plate 803, the other end of the piston rod 804 extends to the upper side of the fixed block 801 and is fixedly connected with the connecting plate 3, a sliding chamber 811 is formed on one side of the hydraulic chamber 809, the slider 806 is slidably connected in the sliding chamber 811, the slider 806 is connected with the side wall of the sliding chamber 811 by the second disc spring 807, a pressure relief hole 813 is further formed on the side surface of the slider 806, a hydraulic pipeline 812 is arranged on one side of the sliding cavity 811 away from the hydraulic cavity 809, the sliding cavity 811 is communicated with the hydraulic cavity 809 through the hydraulic pipeline 812, a speed reduction cavity 814 is arranged above the hydraulic cavity 809, the speed reduction cavity 814 is communicated with a third through hole 810 through a sliding hole 815, the speed reduction mechanism 808 is arranged in the speed reduction cavity 814, and the speed reduction mechanism 808 is connected with the slider 806. When the supporting plate 4 inclines, the connecting plate 3 drives the piston rod 804 to extrude the piston plate 803, so as to compress the first disc spring 805 and absorb a part of kinetic energy, meanwhile, the piston plate 803 extrudes to enable hydraulic oil located on the piston plate 803 to pass through the pressure relief hole 813 to enter the sliding cavity 811, and then the hydraulic oil flows to the upper part of the piston plate 803 through the hydraulic pipeline 812, and in the flowing process of the hydraulic oil, a part of kinetic energy is consumed, so that the moving process of the piston rod 804 is more stable, and noise pollution is reduced. When the sliding speed of the piston rod 804 is too fast, because the opening of the pressure relief hole 813 is small, the pressure of hydraulic oil in the hydraulic cavity 809 can rise along with the pressure, and then the hydraulic oil can extrude the sliding block 806 and compress the second disc spring 807, and meanwhile the sliding block 806 drives the speed reduction mechanism 808 to work, so that the piston rod 804 is reduced in speed, and the irreversible deformation of the support plate 4 is avoided.

Specifically, the speed reducing mechanism 808 includes a rotating gear 8081, a first rotating shaft 8082, a first driving wheel 8083, a second rotating shaft 8084, a second driving wheel 8085, a driving belt 8086, a rotating disc 8087, a push rod 8088, a connecting rod 8089 and a rubber block 80810, a gear cavity 80811 is formed at the top of the sliding cavity 811, the rotating gear 8081 is rotatably connected to the side wall of the gear cavity 80811, the rotating gear 8081 is engaged with the sliding block 806, a driving cavity 80812 is formed at one side of the sliding cavity 811, one end of the first rotating shaft 8082 is fixedly connected with the rotating gear 8081, the other end of the first rotating shaft 8082 extends into the driving cavity 80812 and is fixedly connected with the first driving wheel 8083, the rotating disc 8087 is rotatably connected to the side wall of the speed reducing cavity 814, one end of the second rotating shaft 8084 is fixedly connected with the rotating disc 8087, the other end of the second rotating shaft 8084 extends into the driving cavity 80812 and is fixedly connected with the second driving wheel 8085, the first driving wheel 8083 is connected with the second driving wheel 8085 through the driving belt 8086, and the rubber block 80810 is slidably connected with the sliding hole 815, the push rod 8088 is fixedly arranged on one side of the rubber block 80810, and the other end of the push rod 8088 is hinged with the rotary disc 8087 through a connecting rod 8089. When the extrusion force applied to the slider 806 increases, the hydraulic oil pushes the slider 806 to move rightward, the slider 806 slides to drive the rotating gear 8081 to rotate, the rotating gear 8081 drives the first driving wheel 8083 to rotate through the first rotating shaft 8082, the first driving wheel 8083 drives the second driving wheel 8085 to rotate through the driving belt 8086, the second driving wheel 8085 drives the rotating disc 8087 to rotate through the second rotating shaft 8084, the rotating disc 8087 drives the rubber block 80810 to slide in the sliding hole 815 through the connecting rod 8089 and the pushing rod 8088, so that the rubber block 80810 firmly abuts against the piston rod 804, the friction force applied to the piston rod 804 increases, the deceleration effect on the piston rod 804 is further achieved, the downward moving speed of the piston rod 804 decreases the pressure of the hydraulic oil in the hydraulic cavity 809, the extrusion force applied to the slider 806 decreases, and when the extrusion force applied to the slider 806 is smaller than the elastic force of the second disc spring 807, the slider 806 moves leftward under the elastic force applied to the second disc spring 807, thereby bringing the rubber block 80810 out of contact with the piston rod 804, and dynamically adjusting the moving speed of the piston rod 804 and keeping it within a safe speed range.

Specifically, the support plate 4 is preferably a shape memory alloy. By utilizing the memory effect of the shape memory alloy, after the load disappears, the reset mechanism 8 can drive the support plate 4 to return to the initial state by pushing the connecting plate 3, so that the maintenance cost is reduced.

Specifically, the side wall of the connecting plate 3 is provided with a grouting hole 14 communicated with the limiting groove 9. After the connecting piece installation is accomplished, constructor pours cement or other sealing materials into to the spacing groove 9 through slip casting hole 14, thereby fill up the space between stopper 2 and the spacing groove 9, thereby can avoid stopper 2 to slide in the spacing groove 9 in the working process, cause the relative connecting plate 3 of I-beam 1 to take place slight sliding, thereby make first fastening bolt 5 bear the condition of horizontal shear force, reduce the damage that leads to the fact first fastening bolt 5.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. An assembled shear connector characterized in that: comprises an I-shaped beam (1), a limiting block (2), a connecting plate (3), a supporting plate (4), a first fastening bolt (5), an outer nut (6), a concrete beam (7) and a reset mechanism (8), wherein the limiting block (2) is welded at the bottom of the I-shaped beam (1), a limiting groove (9) is formed in the top of the connecting plate (3), the limiting block (2) is inserted in the limiting groove (9), more than two first through holes (10) are formed in the connecting plate (3), more than two second through holes (11) are formed in the I-shaped beam (1), the first fastening bolt (5) sequentially passes through the first through holes (10), the second through holes (11) and the outer nut (6), the first fastening bolt (5) is in threaded connection with the outer nut (6), one end of the supporting plate (4) is embedded in the concrete beam (7), the other end of the supporting plate (4) is welded at the bottom of the connecting plate (3), two reset mechanisms (8) are respectively arranged on two sides of the support plate (4), one end of each reset mechanism (8) is fixed on the concrete beam (7), and the other end of each reset mechanism (8) is fixedly connected with the connecting plate (3).

2. The fabricated shear connector of claim 1, wherein: the bilateral symmetry of backup pad (4) is provided with L shape backing plate (12), and L shape backing plate (12) simultaneously with connecting plate (3) and backup pad (4) butt, the one end of L shape backing plate (12) is passed through first fastening bolt (5) with connecting plate (3) fixed connection, the other end of L shape backing plate (12) passes through second fastening bolt (13) and backup pad (4) fixed connection.

3. The fabricated shear connector of claim 1, wherein: the resetting mechanism (8) comprises a fixed block (801), a third fastening bolt (802), a piston plate (803), a piston rod (804), a first disc spring (805), a sliding block (806), a second disc spring (807) and a speed reducing mechanism (808), the fixed block (801) is fixed on the concrete beam (7) through the third fastening bolt (802), a hydraulic cavity (809) is formed in the fixed block (801), the piston plate (803) is connected in the hydraulic cavity (809) in a sliding manner, the piston plate (803) is fixedly connected with the bottom wall of the hydraulic cavity (809) through the first disc spring (805), a third through hole (810) is formed above the fixed block (801), the piston rod (804) is connected in the third through hole (810) in a sliding manner, one end of the piston rod (804) is fixedly connected with the piston plate (803), and the other end of the piston rod (804) extends to the upper part of the fixed block (801) and is fixedly connected with the connecting plate (3), smooth chamber (811) have been seted up that hydraulic pressure chamber (809) one side is linked together, slider (806) sliding connection is in smooth chamber (811), and slider (806) are connected with smooth chamber (811) lateral wall through second dish spring (807), pressure release hole (813) have still been seted up to slider (806) side, hydraulic pressure pipeline (812) have been seted up to one side that hydraulic pressure chamber (809) were kept away from in smooth chamber (811), and smooth chamber (811) communicate with hydraulic pressure chamber (809) through hydraulic pressure pipeline (812), speed reduction chamber (814) have been seted up to hydraulic pressure chamber (809) top, and speed reduction chamber (814) communicate with third through-hole (810) through slide hole (815), speed reduction mechanism (808) set up in speed reduction chamber (814), speed reduction mechanism (808) are connected with slider (806).

4. The fabricated shear connector of claim 3, wherein: the speed reducing mechanism (808) comprises a rotating gear (8081), a first rotating shaft (8082), a first driving wheel (8083), a second rotating shaft (8084), a second driving wheel (8085), a driving belt (8086), a turntable (8087), a push rod (8088), a connecting rod (8089) and a rubber block (80810), wherein a gear cavity (80811) is formed in the top of the sliding cavity (811), the rotating gear (8081) is rotatably connected to the side wall of the gear cavity (80811), the rotating gear (8081) is meshed with the sliding block (806), a transmission cavity (80812) is formed in one side of the sliding cavity (811), one end of the first rotating shaft (8082) is fixedly connected with the rotating gear (8081), the other end of the first rotating shaft (8082) extends into the transmission cavity (80812) and is fixedly connected with the first driving wheel (8083), the turntable (8087) is rotatably connected to the side wall of the speed reducing cavity (814), one end of the second rotating shaft (8084) is fixedly connected with the turntable (8087), the other end of the second rotating shaft (8084) extends into the transmission cavity (80812) and is fixedly connected with the second transmission wheel (8085), the first transmission wheel (8083) is in transmission connection with the second transmission wheel (8085) through a transmission belt (8086), the rubber block (80810) is connected in the sliding hole (815) in a sliding mode, the push rod (8088) is fixedly arranged on one side of the rubber block (80810), and the other end of the push rod (8088) is hinged to the rotary disc (8087) through a connecting rod (8089).

5. The fabricated shear connector of claim 1, wherein: the support plate (4) is preferably a shape memory alloy.

6. The fabricated shear connector of claim 1, wherein: and the side wall of the connecting plate (3) is provided with a grouting hole (14) communicated with the limiting groove (9).