Shear connector, composite beam assembly and composite beam construction method

Abstract

The present application relates to the field of construction engineering technology, and specifically, to a shear connector, a composite beam assembly, and a composite beam construction method, comprising a first V-shaped plate, a connecting plate, and a second V-shaped plate arranged in sequence in a first direction, the first V-shaped plate having a first vertex end and a first open end, the second V-shaped plate having a second vertex end and a second open end, the connecting plate having a first connecting end and a second connecting end, the first connecting end being fixedly connected to the first vertex end, the second connecting end being connected to the second vertex end, the first open end being oriented in the opposite direction to the second open end, and the shear connector being used to be fixedly connected to an I-beam in a second direction, the second direction being perpendicular to the first direction. The purpose of the present application is to provide a shear connector, a composite beam assembly, and a composite beam construction method in response to at least one technical problem involved in the background technology.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and in particular to a shear connector, a composite beam assembly and a composite beam construction method. Background Art

[0002] Shear connectors are the guarantee for the coordinated work of steel and concrete. They have two main functions: one is to bear and transmit the longitudinal shear force between steel and concrete; the other is to resist the lifting effect between steel and concrete. The most commonly used ones are bolt connectors and PBL connectors. The fatigue resistance of bolt connectors is poor, and the pull-out force is very weak. Bolts can withstand bidirectional shear force, but their welding is troublesome, the concrete contact surface range that can be withstood is small, and a large number of bolts are required. The effect of the group of bolts will also weaken the overall shear capacity to a certain extent, and there are certain limitations; the shear capacity of PBL connectors (perforated steel plate connectors) is mainly borne by the horizontal through-steel bars and the constraint force of the perforated steel plate, and it cannot give full play to the advantages of the compressive properties of concrete materials, and there are also certain limitations.

[0003] In recent years, ultra-high performance UHPC (ultra-high performance UHPC is a special concrete with ultra-high strength, ultra-durability, low porosity and strong corrosion resistance) has been widely used in composite structures, which greatly improves the strength of concrete. However, the mechanical properties of traditional shear connectors are insufficient, so when the steel-UHPC composite structure is damaged, the shear connectors are often cut off instantly. This kind of damage is brittle and is not good for the safety of the engineering industry. Therefore, there is currently a lack of new connector structures with better mechanical properties. Summary of the invention

[0004] The purpose of the present application is to provide a shear connector, a composite beam assembly and a composite beam construction method in view of at least one technical problem involved in the background technology.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] One aspect of the present application provides a shear-resistant connector, including a first V-shaped plate, a connecting plate, and a second V-shaped plate arranged in sequence in a first direction, the first V-shaped plate having a first vertex end and a first open end, the second V-shaped plate having a second vertex end and a second open end, the connecting plate having a first connecting end and a second connecting end, the first connecting end being fixedly connected to the first vertex end, the second connecting end being connected to the second vertex end, the first open end being oriented in an opposite direction to the second open end, and the shear-resistant connector being used to be fixedly connected to an I-beam in a second direction, the second direction being perpendicular to the first direction.

[0007] Optionally, the first vertex end is an arc-shaped end, and / or the second vertex end is an arc-shaped end.

[0008] The beneficial effect of this technical solution is that it makes it less likely that the fatigue performance of the shear connector will be affected by stress concentration at the first apex end and / or the second apex end, thereby improving the shear performance of the shear connector.

[0009] Optionally, the first V-shaped plate includes a first plate portion and a second plate portion intersecting in a V shape, the first top angle end is located at the connection between the first plate portion and the second plate portion, the second V-shaped plate includes a third plate portion and a fourth plate portion intersecting in a V shape, the second top angle end is located at the connection between the third plate portion and the fourth plate portion, the first plate portion and the third plate portion are located on the same side of the connecting plate in a direction perpendicular to the connecting plate, and the second plate portion and the fourth plate portion are located on the same side of the connecting plate in a direction perpendicular to the connecting plate.

[0010] The beneficial effect of this technical solution is that: that is, a V-shaped structure is formed among the first plate portion, the connecting plate and the third plate portion, and a V-shaped structure is formed among the second plate portion, the connecting plate and the fourth plate portion, so that the outer side of the shear connector can better wrap the concrete, so that the concrete can withstand the reaction force of the shear connector in more directions, and the compressive performance of the concrete can be more fully utilized, thereby improving the overall shear performance of the composite beam.

[0011] Optionally, the first plate portion, the second plate portion, the third plate portion, the fourth plate portion and the connecting plate are all parallel to the second direction, and the first V-shaped plate, the connecting plate and the second V-shaped plate are all used for fixed connection with the I-beam.

[0012] The beneficial effect of this technical solution is that: in this way, the first V-shaped plate, the connecting plate and the second V-shaped plate are all used for fixed connection with the I-beam, thereby improving the connection strength between the shear connector and the I-beam, thereby improving the overall strength of the composite beam.

[0013] Optionally, a connecting plate opening groove is formed on the connecting plate, and the connecting plate opening groove penetrates the connecting plate in the third direction, and the notch of the connecting plate opening groove in the second direction is used to face the side away from the I-beam, and the first direction and the second direction are both perpendicular to the third direction.

[0014] The beneficial effect of this technical solution is that it is convenient to put the steel bars fixed at both ends in the precast concrete slab into the connecting plate opening slot from the notch of the connecting plate opening slot, thereby improving the assembly efficiency between the shear connector and the precast concrete slab, and further improving the manufacturing efficiency of the composite beam.

[0015] Optionally, a first opening groove is formed on the first plate portion, a second opening groove is formed on the second plate portion, a third opening groove is formed on the third plate portion, and a fourth opening groove is formed on the fourth plate portion, and in the second direction, the slot openings of the first opening groove, the second opening groove, the third opening groove and the fourth opening groove are all used to face the side away from the I-beam.

[0016] The beneficial effect of this technical solution is that: in this way, the first V-shaped plate, the connecting plate and the second V-shaped plate on the shear connector can cooperate with the steel bars in the precast concrete slab, increase the connection position between the shear connector and the precast concrete slab, thereby improving the connection strength between the shear connector and the precast concrete slab, and improving the overall strength of the composite beam.

[0017] Another aspect of the present application provides a composite beam assembly, comprising an I-beam, a reinforced concrete slab and a shear connector provided in the present application, wherein the shear connector is fixed to the I-beam, and the reinforced concrete slab is connected to the shear connector;

[0018] The connecting plate is parallel to the second direction, a connecting plate opening slot is formed on the connecting plate, the connecting plate opening slot passes through the connecting plate in the third direction, the notch of the connecting plate opening slot faces the side away from the I-beam in the second direction, and the first direction and the second direction are both perpendicular to the third direction;

[0019] The reinforced concrete slab comprises a first through-steel bar and a concrete slab portion, a shear groove penetrating the concrete slab portion in a direction perpendicular to the concrete slab portion is formed on the concrete slab portion, and the first through-steel bar passes through the shear groove in a direction parallel to the concrete slab portion;

[0020] The shear-resistant connector is located in the shear groove, and the opening groove of the connecting plate is sleeved outside the first through-steel bar.

[0021] Optionally, the first V-shaped plate includes a first plate portion and a second plate portion intersecting in a V shape, the second V-shaped plate includes a third plate portion and a fourth plate portion intersecting in a V shape, and the first plate portion, the second plate portion, the third plate portion and the fourth plate portion are all parallel to the second direction;

[0022] A first opening slot is formed on the first plate portion, a second opening slot is formed on the second plate portion, a third opening slot is formed on the third plate portion, and a fourth opening slot is formed on the fourth plate portion, and in the second direction, the slot openings of the first opening slot, the second opening slot, the third opening slot, and the fourth opening slot all face the side away from the I-beam;

[0023] The reinforced concrete slab further comprises two second through-steel bars, wherein the second through-steel bars penetrate the shear groove in a direction parallel to the first through-steel bars, the second through-steel bars comprise a bent portion, the bent portion is located in the shear groove, and the concave sides of the two bent portions both face the first through-steel bars;

[0024] The first opening slot and the second opening slot are both mounted on one of the bending portions, and the third opening slot and the fourth opening slot are both mounted on the other of the bending portions.

[0025] The beneficial effect of the technical solution is that: in this way, when the reinforced concrete slab and the shear connector are assembled together, the shear connector is extended into the shear groove, and the two ends of the bending part on one side enter the notch of the first hole groove and the notch of the second hole groove respectively, and the two ends of the bending part on the other side enter the notch of the third hole groove and the notch of the fourth hole groove respectively. Since the shape of the V-shaped plate just corresponds to the shape of the bending part, the position of the hole groove on the V-shaped plate just corresponds to the corresponding bending part, so as to achieve the purpose of matching the hole groove and the bending part on the V-shaped plate; this makes the first through steel bar and the second through steel bar assembled and connected with the shear connector, improves the positioning accuracy of the reinforced concrete slab and the shear connector, and also improves the connection strength between the reinforced concrete slab and the shear connector after pouring concrete, thereby improving the overall strength of the composite beam; and the bending part can provide a certain ductility to improve the shear performance of the composite beam; in addition, the setting of each hole groove is convenient for the installation of each through steel bar during prefabricated construction, and there is no need to penetrate on site, thereby reducing the workload of on-site construction and speeding up the construction speed.

[0026] Optionally, the composite beam assembly provided in the present application also includes a first elastic ring mounted on the first through-steel bar, the first elastic ring is located between the first through-steel bar and the concrete slab portion, and the first elastic ring is arranged close to the inner wall of the shear groove; a second elastic ring is mounted on the second through-steel bar, the second elastic ring is located between the second through-steel bar and the concrete slab portion, and the second elastic ring is arranged close to the inner wall of the shear groove.

[0027] The beneficial effect of this technical solution is that: in this way, the inner wall of the shear groove can be isolated from the first through-steel by the first elastic ring, and the inner wall of the shear groove can be isolated from the second through-steel by the second elastic ring, so that the inner wall of the shear groove will not crack due to direct contact with both the first through-steel and the second through-steel.

[0028] A third aspect of the present application provides a composite beam construction method, which is implemented by using the composite beam assembly provided by the present application, the method comprising: fitting the first elastic ring on the first through-steel bar and then placing it in a mold, fitting the second elastic ring on the second through-steel bar and then placing it in the mold, and pouring concrete into the mold to form the reinforced concrete slab;

[0029] Welding the first V-shaped plate, the connecting plate and the second V-shaped plate in sequence to form the shear connector, and welding the shear connector to the I-beam;

[0030] Extend the shear connector into the shear groove, and fit the opening groove of the connecting plate to the first through-steel bar, fit the first opening groove and the second opening groove to one of the bending parts, and fit the third opening groove and the fourth opening groove to the other bending part;

[0031] Pour concrete into the shear groove.

[0032] The technical solution provided by this application can achieve at least one of the following beneficial effects:

[0033] The shear connector, composite beam assembly and composite beam construction method provided by the present application, when in use, first fix the shear connector to the I-beam, then install the reinforced concrete slab on the I-beam, and set the shear connector in the shear groove reserved on the reinforced concrete slab, pour concrete into the shear groove to wrap the shear connector, and after the concrete solidifies, the reinforced concrete slab is fixedly connected to the I-beam through the shear connector. Due to the design of the first V-shaped plate and the second V-shaped plate, the two V-shaped plates can better wrap the concrete. When subjected to shear force, the concrete is compressed due to the reaction force given by the V-shaped plates. In this way, the concrete is fully compressed and the compressive performance of the concrete can be fully exerted, so that the concrete will not crack quickly, thereby improving the overall shear capacity of the composite beam.

[0034] The additional technical features and advantages of the present application will be more clearly explained in the following description, or can be understood through the specific practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the specific implementation methods of the present application, the following is a brief introduction to the drawings required for the description of the specific implementation methods. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic diagram of a three-dimensional structure of an implementation manner of a composite beam assembly provided in an embodiment of the present application;

[0037] Figure 2 A partial three-dimensional structural schematic diagram of an implementation manner of a composite beam assembly provided in an embodiment of the present application;

[0038] Figure 3 A schematic diagram of a three-dimensional structure of an implementation of a reinforced concrete slab provided in an embodiment of the present application;

[0039] Figure 4 A partial three-dimensional structural schematic diagram of an implementation method of a reinforced concrete slab provided in an embodiment of the present application;

[0040] Figure 5 A three-dimensional structural schematic diagram of an implementation manner of the positional relationship between the first through-steel bar and the second through-steel bar provided in an embodiment of the present application;

[0041] Figure 6 A partial three-dimensional structural schematic diagram of another implementation manner of a composite beam assembly provided in an embodiment of the present application;

[0042] Figure 7 A schematic diagram of a three-dimensional structure of another embodiment of a reinforced concrete slab provided in an embodiment of the present application;

[0043] Figure 8 A schematic diagram of a three-dimensional structure of another implementation of a composite beam assembly provided in an embodiment of the present application;

[0044] Fig. 9 A schematic diagram of a three-dimensional structure of an implementation method of a composite beam provided in an embodiment of the present application;

[0045] Fig.10 A schematic flow chart of an implementation of a composite beam construction method provided in an embodiment of the present application.

[0046] Reference numerals:

[0047] 01. Reinforced concrete slab; 02. Shear connector;

[0048] 03. I-beam; 04. First plate;

[0049] 05. second plate portion; 06. first opening slot;

[0050] 07. second opening slot; 08. first vertex end;

[0051] 09. Opening slot of connecting plate; 10. Connecting plate;

[0052] 11. a third plate portion; 12. a third opening slot;

[0053] 13. second apex end; 14. fourth opening slot;

[0054] 15. fourth plate portion; 16. second V-shaped plate;

[0055] 17. first V-shaped plate; 18. first through-steel bar;

[0056] 19. bending portion; 20. second through-steel bar;

[0057] 21. Shear groove; 22. Concrete slab;

[0058] 23. first elastic ring; 24. second elastic ring;

[0059] 25. Pour concrete. DETAILED DESCRIPTION

[0060] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0061] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] like Figures 1 to 9As shown, one aspect of the present application provides a shear-resistant connector 02, including a first V-shaped plate 17, a connecting plate 10 and a second V-shaped plate 16 arranged in sequence in a first direction, the first V-shaped plate 17 having a first vertex end 08 and a first open end, the second V-shaped plate 16 having a second vertex end 13 and a second open end, the connecting plate 10 having a first connecting end and a second connecting end, the first connecting end being fixedly connected to the first vertex end 08, the second connecting end being connected to the second vertex end 13, the orientation of the first open end being opposite to that of the second open end, the shear-resistant connector 02 being used to be fixedly connected to the I-beam 03 in a second direction, the second direction being perpendicular to the first direction.

[0064] When the shear connector 02 provided in the present application is used, the shear connector 02 is first fixedly connected to the I-beam 03, and then the reinforced concrete slab 01 is installed on the I-beam 03, and the shear connector 02 is set in the shear groove 21 reserved on the reinforced concrete slab 01, and concrete is poured into the shear groove 21 to wrap the shear connector 02. After the poured concrete 25 solidifies, the reinforced concrete slab 01 is fixedly connected to the I-beam 03 through the shear connector 02. Due to the design of the first V-shaped plate 17 and the second V-shaped plate 16, the two V-shaped plates can better wrap the concrete. When subjected to shear force, the concrete is compressed due to the reaction force given by the V-shaped plates. In this way, the compressive properties of the concrete can be fully utilized to prevent the concrete from cracking rapidly, thereby improving the overall shear resistance of the composite beam.

[0065] Optionally, the first apex end 08 is an arc-shaped end, and / or the second apex end 13 is an arc-shaped end. This makes it difficult for the shear connector 02 to be affected in fatigue performance due to stress concentration at the first apex end 08 and / or the second apex end 13, thereby improving the shear performance of the shear connector 02.

[0066] Optionally, the first V-shaped plate 17 includes a first plate portion 04 and a second plate portion 05 intersecting in a V shape, the first top angle end 08 is located at the connection between the first plate portion 04 and the second plate portion 05, the second V-shaped plate 16 includes a third plate portion 11 and a fourth plate portion 15 intersecting in a V shape, the second top angle end 13 is located at the connection between the third plate portion 11 and the fourth plate portion 15, the first plate portion 04 and the third plate portion 11 are located on the same side of the connecting plate 10 in a direction perpendicular to the connecting plate 10, and the second plate portion 05 and the fourth plate portion 15 are located on the same side of the connecting plate 10 in a direction perpendicular to the connecting plate 10. That is to say, a V-shaped structure is formed between the first plate portion 04, the connecting plate 10 and the third plate portion 11, and a V-shaped structure is formed between the second plate portion 05, the connecting plate 10 and the fourth plate portion 15. In this way, the outer side of the shear connector 02 can better wrap the concrete, so that the concrete can withstand the reaction force of the shear connector 02 in more directions, making full use of the compressive performance of the concrete, thereby improving the overall shear performance of the composite beam. Of course, the first plate portion 04 and the third plate portion 11 are set at an angle, and the second plate portion 05 and the fourth plate portion 15 are set at an angle.

[0067] Optionally, the first plate portion 04, the second plate portion 05, the third plate portion 11, the fourth plate portion 15 and the connecting plate 10 are all parallel to the second direction, and the first V-shaped plate 17, the connecting plate 10 and the second V-shaped plate 16 are all used for fixed connection with the I-beam 03. In this way, the first V-shaped plate 17, the connecting plate 10 and the second V-shaped plate 16 are all used for fixed connection with the I-beam 03, thereby improving the connection strength between the shear connector 02 and the I-beam 03, thereby improving the overall strength of the composite beam. Of course, one or both of the first V-shaped plate 17, the connecting plate 10 and the second V-shaped plate 16 can also be used for fixed connection with the I-beam 03.

[0068] like Figure 2 As shown, optionally, a connecting plate opening slot 09 is formed on the connecting plate 10, and the connecting plate opening slot 09 penetrates the connecting plate 10 in the third direction, and the notch of the connecting plate opening slot 09 in the second direction is used to face the side away from the I-beam 03, and the first direction and the second direction are both perpendicular to the third direction. In this way, it is convenient to put the steel bars fixed in the precast concrete slab at both ends into the connecting plate opening slot 09 from the notch of the connecting plate opening slot 09, thereby improving the assembly efficiency between the shear connector 02 and the precast concrete slab, and thus improving the manufacturing efficiency of the composite beam.

[0069] Optionally, a first opening slot 06 is formed on the first plate portion 04, a second opening slot 07 is formed on the second plate portion 05, a third opening slot 12 is formed on the third plate portion 11, and a fourth opening slot 14 is formed on the fourth plate portion 15, and in the second direction, the notches of the first opening slot 06, the second opening slot 07, the third opening slot 12, and the fourth opening slot 14 are all used to face the side away from the I-beam 03. In this way, the first V-shaped plate 17, the connecting plate 10, and the second V-shaped plate 16 on the shear connector 02 can all cooperate with the steel bars in the reinforced concrete slab, increase the connection position between the shear connector 02 and the reinforced concrete slab, thereby improving the connection strength between the shear connector 02 and the reinforced concrete slab, and improving the overall strength of the composite beam.

[0070] like Figure 1 and Figure 8 As shown, another aspect of the present application provides a composite beam assembly, including an I-beam 03, a reinforced concrete slab 01, and a shear connector 02 provided in an embodiment of the present application, wherein the shear connector 02 is fixed to the I-beam 03, and the reinforced concrete slab 01 is connected to the shear connector 02;

[0071] The connecting plate 10 is parallel to the second direction, and a connecting plate opening slot 09 is formed on the connecting plate 10. The connecting plate opening slot 09 penetrates the connecting plate 10 in the third direction, and the notch of the connecting plate opening slot 09 faces the side away from the I-beam 03 in the second direction. The first direction and the second direction are both perpendicular to the third direction;

[0072] The reinforced concrete slab 01 includes a first through-steel bar 18 and a concrete slab portion 22, on which a shear groove 21 is formed that penetrates the concrete slab portion 22 in a direction perpendicular to the concrete slab portion 22, and the first through-steel bar 18 passes through the shear groove 21 in a direction parallel to the concrete slab portion 22;

[0073] The shear-resistant connector 02 is located in the shear groove 21 , and the connecting plate opening groove 09 is sleeved outside the first through-steel bar 18 .

[0074] The composite beam assembly provided in the present application adopts the shear connector 02 provided in the present application. When in use, the shear connector 02 is first fixedly connected to the I-beam 03, and then the reinforced concrete slab 01 is installed on the I-beam 03, and the shear connector 02 is set in the shear groove 21 reserved on the reinforced concrete slab 01, and concrete is poured into the shear groove 21 to wrap the shear connector 02. After the concrete solidifies, the reinforced concrete slab is fixedly connected to the I-beam 03 through the shear connector 02. Due to the design of the first V-shaped plate 17 and the second V-shaped plate 16, the two V-shaped plates can better wrap the concrete. When subjected to shear force, the concrete is compressed due to the reaction force given by the V-shaped plates. In this way, the compressive performance of the concrete is fully utilized to prevent the concrete from cracking quickly, thereby improving the overall shear capacity of the composite beam.

[0075] When the reinforced concrete slab 01 and the shear connector 02 are assembled together, the shear connector 02 is extended into the shear groove 21, and the first through-steel bar 18 is inserted into the connecting plate opening groove 09 from the notch of the connecting plate opening groove 09, so that the reinforced concrete slab 01 and the shear connector 02 are assembled and positioned, thereby preparing for the subsequent pouring of concrete.

[0076] Optionally, the first V-shaped plate 17 includes a first plate portion 04 and a second plate portion 05 intersecting in a V shape, and the second V-shaped plate 16 includes a third plate portion 11 and a fourth plate portion 15 intersecting in a V shape, and the first plate portion 04, the second plate portion 05, the third plate portion 11 and the fourth plate portion 15 are all parallel to the second direction;

[0077] A first opening slot 06 is formed on the first plate portion 04, a second opening slot 07 is formed on the second plate portion 05, a third opening slot 12 is formed on the third plate portion 11, and a fourth opening slot 14 is formed on the fourth plate portion 15, and in the second direction, the notches of the first opening slot 06, the second opening slot 07, the third opening slot 12, and the fourth opening slot 14 all face the side away from the I-beam 03;

[0078] The reinforced concrete slab 01 further includes two second through-steel bars 20, the second through-steel bars 20 penetrate the shear groove 21 in a direction parallel to the first through-steel bars 18, the second through-steel bars 20 include a bent portion 19, the bent portion 19 is located in the shear groove 21, and the concave sides of the two bent portions 19 both face the first through-steel bars 18;

[0079] The first opening slot 06 and the second opening slot 07 are both mounted on one of the bending portions 19 , and the third opening slot 12 and the fourth opening slot 14 are both mounted on the other of the bending portions.

[0080] In this way, when the reinforced concrete slab 01 and the shear connector 02 are assembled together, the shear connector 02 is extended into the shear groove 21, and the two ends of the bent portion 19 on one side are respectively inserted into the notch of the first hole groove 06 and the notch of the second hole groove 07, and the two ends of the bent portion 19 on the other side are respectively inserted into the notch of the third hole groove 12 and the notch of the fourth hole groove 14. Since the shape of the V-shaped plate just corresponds to the shape of the bent portion 19, the position of the hole groove on the V-shaped plate just corresponds to the corresponding bent portion 19, so that the hole groove on the V-shaped plate and the bent portion 19 are matched. This enables the first through-steel bar 18 and the second through-steel bar 20 to be assembled and connected with the shear connector 02, thereby improving the positioning accuracy of the reinforced concrete slab 01 and the shear connector 02, and also improving the connection strength between the reinforced concrete slab 01 and the shear connector 02 after pouring concrete, thereby improving the overall strength of the composite beam; and, the bent portion 19 is able to provide a certain ductility to improve the shear performance of the composite beam; in addition, the provision of each opening slot facilitates the installation of each through-steel bar during prefabricated construction, without the need for on-site penetration, thereby reducing on-site construction workload and speeding up construction.

[0081] Optionally, the composite beam assembly provided in the embodiment of the present application further includes a first elastic ring 23 mounted on the first through-steel bar 18, the first elastic ring 23 is located between the first through-steel bar 18 and the concrete slab portion 22, and the first elastic ring 23 is arranged close to the inner wall of the shear groove 21; a second elastic ring 24 is mounted on the second through-steel bar 20, the second elastic ring 24 is located between the second through-steel bar 20 and the concrete slab portion 22, and the second elastic ring 24 is arranged close to the inner wall of the shear groove 21. In this way, the inner wall of the shear groove 21 can be isolated from the first through-steel bar 18 by the first elastic ring 23, and the inner wall of the shear groove 21 can be isolated from the second through-steel bar 20 by the second elastic ring 24, so that the inner wall of the shear groove 21 will not crack due to direct contact with both the first through-steel bar 18 and the second through-steel bar 20. In the embodiment of the present application, the first elastic ring 23 and the second elastic ring 24 are preferably elastic rubber rings or high-strength elastic rubber rings.

[0082] like Fig.10 As shown, the third aspect of the present application provides a composite beam construction method, which is implemented by applying the composite beam assembly provided in the embodiment of the present application, and the method comprises: step 100: fitting the first elastic ring 23 on the first through-steel 18 and placing it in a mold, fitting the second elastic ring 24 on the second through-steel 20 and placing it in the mold, and pouring concrete into the mold to form the reinforced concrete slab 01;

[0083] It can be understood that after being formed in the mold, the shear groove 21 is formed on the concrete slab portion 22 .

[0084] Step 200: welding the first V-shaped plate 17, the connecting plate 10 and the second V-shaped plate 16 in sequence to form the shear-resistant connector 02, and welding the shear-resistant connector 02 to the I-beam 03;

[0085] Step 300: Extend the shear connector 02 into the shear groove 21, and fit the connecting plate opening groove 09 on the first through steel bar 18, fit the first opening groove 06 and the second opening groove 07 on one of the bending parts 19, and fit the third opening groove 12 and the fourth opening groove 14 on the other bending part 19;

[0086] Step 400: pouring concrete into the shear groove 21. The concrete described in the embodiment of the present application is preferably ultra-high performance concrete UHPC.

[0087] In the embodiment of the present application, preferably, at least two shear connectors 02 are arranged on the same I-beam 03, and at least two shear grooves 21 are formed on the concrete slab portion 22, and each shear groove 21 is matched with each shear connector 02 in a one-to-one manner.

[0088] The composite beam provided in the present application can fully ensure the transmission of shear force between the UHPC concrete slab and the I-beam, thereby improving the shear resistance and increasing the ductility of the structure.

[0089] The shear connector, composite beam assembly and composite beam construction method provided in this application can effectively shorten the construction period and reduce the problems encountered in the construction by using assembly technology. Different from the traditional construction technology, assembly technology can realize the unified production of engineering components, and then transport them to the construction site for installation. Assembly technology can improve the overall quality of the installation of accessories, reduce the difficulty of construction, and conform to the concept of green development and construction.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A shear connector, characterized in that: It includes a first V-shaped plate, a connecting plate and a second V-shaped plate arranged in sequence in a first direction, the first V-shaped plate has a first vertex end and a first open end, the second V-shaped plate has a second vertex end and a second open end, the connecting plate has a first connecting end and a second connecting end, the first connecting end is fixedly connected to the first vertex end, the second connecting end is connected to the second vertex end, the direction of the first open end is opposite to that of the second open end, and the shear connector is used to be fixedly connected to the I-beam in the second direction, and the second direction is perpendicular to the first direction.

2. The shear connector according to claim 1, characterized in that: The first vertex end is an arc-shaped end, and / or the second vertex end is an arc-shaped end.

3. The shear connector according to claim 1, characterized in that: The first V-shaped plate includes a first plate portion and a second plate portion intersecting in a V shape, the first top angle end is located at the connection between the first plate portion and the second plate portion, the second V-shaped plate includes a third plate portion and a fourth plate portion intersecting in a V shape, the second top angle end is located at the connection between the third plate portion and the fourth plate portion, the first plate portion and the third plate portion are located on the same side of the connecting plate in a direction perpendicular to the connecting plate, and the second plate portion and the fourth plate portion are located on the same side of the connecting plate in a direction perpendicular to the connecting plate.

4. The shear connector according to claim 3, characterized in that: The first plate portion, the second plate portion, the third plate portion, the fourth plate portion and the connecting plate are all parallel to the second direction, and the first V-shaped plate, the connecting plate and the second V-shaped plate are all used for fixed connection with the I-beam.

5. The shear connector according to claim 4, characterized in that: A connecting plate opening groove is formed on the connecting plate, and the connecting plate opening groove penetrates the connecting plate in the third direction. In the second direction, the notch of the connecting plate opening groove is used to face the side away from the I-beam, and the first direction and the second direction are both perpendicular to the third direction.

6. The shear connector according to claim 5, characterized in that: A first opening groove is formed on the first plate portion, a second opening groove is formed on the second plate portion, a third opening groove is formed on the third plate portion, and a fourth opening groove is formed on the fourth plate portion, and in the second direction, the notches of the first opening groove, the second opening groove, the third opening groove and the fourth opening groove are all used to face the side away from the I-beam.

7. A composite beam assembly, characterized in that: It comprises an I-beam, a reinforced concrete slab and a shear connector as claimed in any one of claims 1 to 6, wherein the shear connector is fixed to the I-beam, and the reinforced concrete slab is connected to the shear connector; The connecting plate is parallel to the second direction, a connecting plate opening slot is formed on the connecting plate, the connecting plate opening slot passes through the connecting plate in the third direction, the notch of the connecting plate opening slot faces the side away from the I-beam in the second direction, and the first direction and the second direction are both perpendicular to the third direction; The reinforced concrete slab comprises a first through-steel bar and a concrete slab portion, a shear groove penetrating the concrete slab portion in a direction perpendicular to the concrete slab portion is formed on the concrete slab portion, and the first through-steel bar passes through the shear groove in a direction parallel to the concrete slab portion; The shear-resistant connector is located in the shear groove, and the opening groove of the connecting plate is sleeved outside the first through-steel bar.

8. The composite beam assembly according to claim 7, characterized in that: The first V-shaped plate includes a first plate portion and a second plate portion intersecting in a V shape, the second V-shaped plate includes a third plate portion and a fourth plate portion intersecting in a V shape, and the first plate portion, the second plate portion, the third plate portion and the fourth plate portion are all parallel to the second direction; A first opening slot is formed on the first plate portion, a second opening slot is formed on the second plate portion, a third opening slot is formed on the third plate portion, and a fourth opening slot is formed on the fourth plate portion, and in the second direction, the slot openings of the first opening slot, the second opening slot, the third opening slot, and the fourth opening slot all face the side away from the I-beam; The reinforced concrete slab further comprises two second through-steel bars, wherein the second through-steel bars penetrate the shear groove in a direction parallel to the first through-steel bars, the second through-steel bars comprise a bent portion, the bent portion is located in the shear groove, and the concave sides of the two bent portions both face the first through-steel bars; The first opening slot and the second opening slot are both mounted on one of the bending portions, and the third opening slot and the fourth opening slot are both mounted on the other of the bending portions.

9. The composite beam assembly according to claim 8, characterized in that: It also includes a first elastic ring sleeved on the first through-steel bar, the first elastic ring is located between the first through-steel bar and the concrete slab portion, and the first elastic ring is arranged close to the inner wall of the shear groove; and a second elastic ring sleeved on the second through-steel bar, the second elastic ring is located between the second through-steel bar and the concrete slab portion, and the second elastic ring is arranged close to the inner wall of the shear groove.

10. A composite beam construction method, characterized in that: The method is implemented by using the composite beam assembly as claimed in claim 9, comprising: The first through-steel bar is covered with the first elastic ring and then placed in a mold, the second through-steel bar is covered with the second elastic ring and then placed in the mold, and concrete is poured into the mold to form the reinforced concrete slab; Welding the first V-shaped plate, the connecting plate and the second V-shaped plate in sequence to form the shear connector, and welding the shear connector to the I-beam; Extend the shear connector into the shear groove, and fit the opening groove of the connecting plate to the first through-steel bar, fit the first opening groove and the second opening groove to one of the bending parts, and fit the third opening groove and the fourth opening groove to the other bending part; Pour concrete into the shear groove.

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