Flush assembly type bending-shearing separation steel beam splicing joint

Abstract

The invention discloses a flush assembly type bending-shearing separation steel beam splicing joint which comprises a bearing part, and the bearing part comprises a bearing piece, a connecting piece arranged on the bearing piece, an anti-shearing piece arranged on the connecting piece and a fastening piece arranged on the connecting piece; the connecting piece comprises an end plate and a plurality of first through holes formed in the end plate; the shear-resistant pieces are arranged on the two sides of the middle of each end plate, so that the top ends of the steel beams are kept flush when the steel beams are connected, in addition, the shear-resistant pieces are connected with the two end plates in a clamped mode, the shear force of fasteners is counteracted, and the service life of equipment is prolonged; according to the equipment, the anti-shearing blocks are embedded into the anti-shearing grooves in the two end plates, so that the inclined surfaces of the anti-shearing blocks extrude the inclined blocks, then the top ends of the auxiliary steel beams are flush when the steel beams are connected, in addition, after the steel beams are installed, the anti-shearing blocks can directly bear shearing force between the two steel beams, bolts are only subjected to the action of pulling force, and the service life of the equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial steel beam connection, and particularly relates to a flush assembly type bending-shear separation steel beam splicing joint. BACKGROUND

[0002] H-shaped steel is often used as a beam in a steel frame structure due to its wide flange, thin web and good overall bending resistance. The construction form of a beam-beam splicing joint is directly related to the load transmission stability of the structure system and the convenience of construction, and is a key link for ensuring the safety and efficient construction of a steel frame structure.

[0003] With the continuous improvement of the industrialization and assembly level of steel structure buildings, the traditional welding connection mode gradually cannot meet the needs of modern buildings due to long construction period and high on-site operation requirements. In comparison, the full bolt connection joint has the advantages of stable load transmission, fast installation, detachability and reusability, and is gradually becoming the main form of beam-beam splicing in the assembly type steel structure engineering.

[0004] At present, common full bolt steel beam splicing joint forms include flange splicing plate connection and end plate type connection. In order to ensure the strength and stiffness of the connection, the former usually needs to be provided with splicing cover plates on the inner and outer sides of the flange, and the latter is usually provided as an extended end plate. Such settings inevitably damage the flushness of the flange at the connection position, which causes difficulties for the subsequent floor of the system.

[0005] On the other hand, the flush end plate connection joint can ensure the flushness of the flange at the connection position, but the connection stiffness and strength are difficult to guarantee, and it is often regarded as a hinged joint. Research shows that the weak connection characteristics of the flush end plate connection mainly manifest as the opening of the flange at the connection surface, and the generation of the opening will greatly weaken the rotational constraint capacity of the joint and reduce the stiffness of the joint. The ultimate bearing capacity of the connection under bending and shearing mainly depends on the strength of the bolts outside the connection (flange side), and under the action of large loads such as earthquakes, the bolts outside the connection will be broken under the bending and shearing, resulting in brittle failure of the connection.

[0006] For the flush end plate connection, increasing the thickness of the connection end plate can significantly limit the opening deformation, but this setting is easy to cause the performance intersection in the thickness direction of the end plate, which is not conducive to guaranteeing the welding quality of the end plate and the steel beam. At the same time, this mode does not solve the problem that the shearing resistance bearing completely depends on the bolts, and for high shearing section, the number and size of the bolts increase, which is easy to cause arrangement difficulties.

[0007] In summary, the existing H-shaped steel beam splicing joint is still difficult to meet the needs of construction and load transmission performance, that is, to ensure the flushness of the flange at the connection position while having good bending stiffness and bearing capacity. Therefore, it is urgent to design a new type of steel beam splicing joint structure which is simple in processing and installation, reasonable in construction and stable in load transmission. SUMMARY

[0008] Therefore, the technical problem to be solved by the present invention is that the splicing plate connection and the end plate connection disrupt the flushness of the flange at the connection position, which makes it difficult to install the subsequent floor slabs of the system; under the action of large loads such as earthquakes, the outer bolts break under bending and shearing, resulting in brittle failure of the connection.

[0009] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a flat prefabricated bending-shear separation steel beam splicing node, which includes a bearing part, which includes a bearing member, a connector disposed on the bearing member, a shear-resistant member disposed on the connector, and a fastener disposed on the connector; The connector includes an end plate and a plurality of first through holes formed on the end plate; Shear-resistant members are provided on both sides of the middle part of the end plate. The two end plates are connected by the shear-resistant members. The shear-resistant members are used to transfer the shear force at the beam end, making the force transmission of the structure more reasonable. The beam end fasteners are mainly subjected to tensile force caused by bending moment, which optimizes the stress form of the fasteners and improves the bearing capacity of the node under seismic load.

[0010] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: both the upper and lower ends of the end plate are provided with bevels, and the bevels are all facing the corresponding steel beam direction.

[0011] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: the bearing member includes a mounting steel beam disposed on an end plate and a splicing steel beam disposed on another end plate.

[0012] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: the shear-resistant member includes an shear-resistant groove formed on the end plate, an shear-resistant block disposed on the shear-resistant groove, and a guard plate fixedly connected to the shear-resistant block.

[0013] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: the anti-shear groove is provided on both sides of the middle part of the end plate, and the anti-shear groove is trapezoidal.

[0014] In a preferred embodiment of the flat prefabricated bending-shear separation steel beam splicing node of the present invention: the shear block body is a trapezoidal prism, and the guard plate is fixedly connected to both sides of the shear block. The slope of the hypotenuse of the shear block is adapted to the slope of the hypotenuse of the shear groove. The height of the shear block is less than the depth of the shear groove, and the slopes of both hypotenuses are greater than the friction self-locking angle.

[0015] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: the fastener includes a pad on the end plate, a second through hole on the pad, a bolt inside the second through hole, and a nut threaded to the outer wall of the bolt.

[0016] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: the diameter of the bolt is smaller than the diameter of the first through hole and the second through hole.

[0017] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: the body of the pad block is composed of an upper trapezoidal block and a lower square block.

[0018] In a preferred embodiment of the flush prefabricated bending-shear separation steel beam splicing node of the present invention: four sets of fasteners are provided, which are respectively provided on the upper and lower sides of the two sides of the end plate.

[0019] The beneficial effects of this invention are as follows: by embedding the anti-shear block into the anti-shear groove on the two end plates, the inclined surface of the anti-shear block squeezes the inclined block, thereby helping the top of the steel beam to be flush during the connection of the steel beam. In addition, after the steel beam is installed, the anti-shear block will directly bear the shear force between the two steel beams, so that the bolt is only subjected to tensile force, thereby increasing the service life of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the overall splicing node of the flush prefabricated bending-shear separation steel beam is shown. Figure 2 It shows Figure 1 Enlarged view of point A in the middle; Figure 3 An exploded view of the splicing node of the flush prefabricated bending-shear separation steel beam is shown; Figure 4 A schematic diagram of the end plate structure of the splicing node of the flush prefabricated bending-shear separation steel beam is shown. Figure 5 A schematic diagram of the shear block structure of the flush prefabricated bending-shear separation steel beam splicing node is shown; Figure 6 A schematic diagram of the pad structure for the splicing node of the flush prefabricated bending-shear separation steel beam is shown. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0023] Reference Figures 1-6 This embodiment provides a flat prefabricated bending-shear separation steel beam splicing node, including a bearing part 1, which includes a bearing member 11, a connector 12 disposed on the bearing member 11, a shear member 13 disposed on the connector 12, and a fastener 14 disposed on the connector 12. The load-bearing member 11 is used to support the entire connection node, thereby fixing the fastener 14, the connector 12 and the shear-resistant member 13 to it; the connector 12 is used to connect the two steel beams together, the fastener 14 is used to tighten the steel beams, so that the two steel beams are tightly connected together, and the shear-resistant member 13 is used to bear the shear force of the node, so that the connecting bolt 143 is only subjected to tensile force.

[0024] Preferably, the two steel beams are connected together by the connector 12, and then the top of the connector 12 is flush with the shear-resistant member 13, which simplifies the subsequent work. Then, the equipment is installed by the fastener 14. The shear-resistant member 13 fully bears the shear force between the two steel beams, so that the bolt 143 only bears the tensile force between the steel beams, thereby increasing the service life of the equipment.

[0025] Reference Figure 3 The connector 12 includes an end plate 121 and a plurality of first through holes 122 formed on the end plate 121; The end plate 121 has an I-shaped body and shear grooves 131 on both sides. Multiple first through holes 122 are provided on the end plate 121, located on the upper and lower sides and the left and right sides respectively. The end plate 121 is welded to the end of the steel beam.

[0026] Furthermore, shear-resistant members 13 are provided on both sides of the middle part of the end plate 121. The two end plates 121 are connected by the shear-resistant members 13. The shear-resistant members 13 are used to transfer the shear force at the beam end, making the force transmission of the structure more reasonable. The beam end fastener 14 is mainly subjected to the tensile force caused by the bending moment. The stress form of the fastener 14 is optimized, and the bearing capacity of the node under seismic load is improved.

[0027] Preferably, when connecting the steel beams, the fasteners 14 are first installed to pre-fix them. Then, the shear members 13 are installed to fix them onto the end plates 121, completing the connection. Finally, the fasteners 14 are tightened to complete the installation. This also ensures that the top of the steel beam is flush. Furthermore, the shear members 13 connect the two end plates 121, allowing for the transfer of shear force at the beam ends, making the force transmission in the structure more rational. The beam end fasteners 14 are mainly subjected to tensile force caused by bending moment, thus optimizing the stress form of the fasteners 14 and improving the bearing capacity of the nodes under seismic loads.

[0028] Reference Figure 4 Both the upper and lower ends of the end plate 121 are provided with bevels 1211, and the bevels 1211 are all facing the corresponding steel beam direction.

[0029] By setting a bevel that tends towards the steel beam, it is easier to weld the end plate 121 to the steel beam.

[0030] In summary: When installing the flat prefabricated bending-shear separation steel beam splicing node, firstly, the I-shaped end plate 121 is welded to the ends of the two steel beams. Then, fasteners 14 are installed to put it in a pre-fixed state. Next, the shear-resistant component 13 is installed and fixed in the shear-resistant grooves 131 on both sides of the middle of the end plate 121. During the installation process, the internal parts will squeeze the end plate 121, so that the two end plates 121 are kept at the same horizontal height, thereby ensuring that the top of the steel beam is flush. Finally, the fasteners 14 are fully tightened to complete the overall installation. During this process, the shear-resistant component 13 will fully bear the shear force between the two steel beams, so that the fasteners 14 only bear the tensile force between the steel beams, effectively extending the service life of the equipment. In addition, the bevel 1211 on the end plate 121 also makes the welding operation with the steel beam more convenient.

[0031] Reference Figures 3-5 As an optional embodiment, a flush prefabricated bending-shear separation steel beam splicing node is provided, including a load-bearing member 11 including an installation steel beam disposed on an end plate 121, and a splicing steel beam 112 disposed on another end plate 121.

[0032] The steel beam is a fixed end. If its length is insufficient, it needs to be extended by installing splicing beams at its ends to complete the lengthening of the steel beam.

[0033] Reference Figure 3The shear-resistant component 13 includes an shear-resistant groove 131 formed on the end plate 121, an shear-resistant block 132 disposed on the shear-resistant groove 131, and a guard plate 133 fixedly connected to the shear-resistant block 132.

[0034] The shear groove 131 is designed to cooperate with the installation of the shear block 132, so that the shear block 132 presses against the end plate 121 to keep the two end plates 121 flush. At the same time, through the connection between the shear groove 131 and the shear block 132, the shear block 132 can directly bear the shear force between the two end plates 121, thereby freeing the fastener 14 so that the bolt 143 inside it only bears the tensile force. The guard plate 133 is designed to assist the installation of the shear block 132 and prevent it from shifting during installation.

[0035] Preferably, by installing the anti-shear block 132 inside the anti-shear groove 131, the inclined surface of the anti-shear block 132 presses against the inclined surface of the anti-shear groove 131, thereby ensuring that the two end plates 121 are flush. Furthermore, after installation, the shear force between the two end plates 121 is entirely borne by the anti-shear groove 131, and the bolts 143 of the fastener 14 only need to bear the tensile force.

[0036] Reference Figure 4 Shear grooves 131 are provided on both sides of the middle part of end plate 121, and shear grooves 131 are trapezoidal.

[0037] The trapezoidal inclined surface can convert lateral shear force into partial vertical pressure, disperse local stress at the edge of the tank, and prevent cracking of the rectangular tank due to stress concentration. Reference Figure 5 The anti-shear block 132 is a trapezoidal prism, and the guard plate 133 is fixedly connected to both sides of the anti-shear block 132. The slope of the hypotenuse of the anti-shear block 132 is adapted to the slope of the hypotenuse of the anti-shear groove 131. The height of the anti-shear block 132 is less than the depth of the anti-shear groove 131, and the slopes of both hypotenuses are greater than the friction self-locking angle.

[0038] The trapezoidal prism ensures that the shear block 132 and the inclined and bottom surfaces of the shear groove 131 are tightly fitted, resulting in a larger contact area and more uniform shear force transmission. This avoids local compression deformation caused by insufficient local contact area and improves shear resistance. The guard plate 133 prevents the shear block 132 from detaching from the shear groove 131 due to excessive lateral displacement when subjected to shear force. In actual use, the steel beam splice node may be subjected to bidirectional shear force or slight torsional force. The guard plate 133 can restrict the lateral movement of the shear block 132 by fitting against the side of the end plate 121, ensuring that the shear block 132 is always within the effective stress range of the shear groove 131. Furthermore, when the slope is greater than the friction self-locking angle, the anti-shear block 132 can adaptively adjust within the anti-shear groove 131 with the slight displacement of the steel beam, which not only does not affect the normal shear force transmission, but also releases the additional stress generated by the excess displacement.

[0039] In summary: During the installation of the steel beam splicing joint, the end plates 121 with trapezoidal shear grooves 131 are first welded to the ends of the fixed-end installation steel beam and the ends of the splicing steel beam 112 to be spliced, respectively. Then, fasteners 14 are installed to pre-fix the beam. Next, the trapezoidal prism shear blocks 132 are installed in the corresponding shear grooves 131 of the two end plates 121. The inclined surface pressing action of the shear blocks 132 and the shear grooves 131 keeps the two end plates 121 flush. The guard plate 133 is then... The anti-shear block 132 is fitted to the side of the end plate 121 to prevent it from shifting during installation and from falling out of the anti-shear groove 131 under stress. Finally, the fastener 14 is fully tightened to complete the overall installation. After installation, the anti-shear groove 131 and the anti-shear block 132 cooperate to bear all the shear force between the two end plates 121, so that the bolt 143 of the fastener 14 only bears the tensile force. The trapezoidal structure can disperse stress, increase the contact area and improve the shear resistance. The slope design of the anti-shear block 132 can be adaptively adjusted to release additional stress.

[0040] Reference Figures 3-6 As an optional embodiment, a flat prefabricated bending-shear separation steel beam splicing node is provided, including fasteners 14 including a pad 141 disposed on an end plate 121, a second through hole 142 disposed on the pad 141, a bolt 143 disposed inside the second through hole 142, and a nut 144 threaded to the outer wall of the bolt 143.

[0041] The second pad 141 is provided to increase the area of ​​the end plate 121 under tension. At the same time, when the end plate 121 is under stress and tends to bend, it can help the end plate 121 to prevent this tendency from occurring. By distributing the tension to the four corners of the end plate 121, the second bolt 143 hole is provided to cooperate with the bolt 143 and the first bolt 143 hole to fix the two end plates 121 together, thereby enabling the two steel beams to be spliced. The nut 144 is used to cooperate with the bolt 143 to install and fix it.

[0042] Preferably, after installation, the pad 141 will distribute the tension of the bolt and cover the four corners of the end plate 121, thereby increasing the range of tension on the end plate 121. This allows the pad 141 to press down on the end plate 121 and prevent it from opening when the end plate 121 is subjected to internal stress, thus increasing the load-bearing capacity of the joint.

[0043] Reference Figure 3 The diameter of bolt 143 is smaller than the diameter of the first through hole 122 and the second through hole 142.

[0044] Because industrial manufacturing involves errors, by setting a first through hole 122 and a second through hole 142 that are larger than the diameter of the bolt 143 hole, the bolt 143 can be properly installed inside the bolt hole, preventing the bolt 143 from being too large and thus unable to be installed.

[0045] Reference Figure 6 The main body of the pad 141 is composed of a trapezoidal block 1411 on the upper side and a square block 1412 on the lower side.

[0046] The trapezoidal block 1411 and the bolt 143 are connected at the ends, and the square block 1412 is set to connect with the end plate 121. After installation, the bolt 143 transmits the tension to the end plate 121 through the trapezoidal block 1411 and the square block 1412. Preferably, if the pad 141 is a pure square, the preload will be concentrated in a small area directly below the bolt 143, which may cause the hole edge to tear due to excessive local stress around the screw hole of the end plate 121. However, the inclined surface of the trapezoidal block 1411 can diffuse the preload to both sides. The force is transmitted from the top of the trapezoidal block 1411 along the inclined surface to the square block 1412 at the bottom of the trapezoidal block 1411, and then evenly transmitted from the square block 1412 to the surface of the end plate 121, thereby expanding the coverage area of ​​the preload and significantly reducing the stress peak around the screw hole of the end plate 121.

[0047] Reference Figure 3 The fasteners 14 are provided in four sets, which are respectively located on the upper and lower sides of the two sides of the end plate 121.

[0048] By setting four sets of fasteners 14, the left and right sides and the top and bottom sides of the end plate 121 are all subjected to the action of the fasteners 14, thereby making the end plate 121 more stable during operation.

[0049] In summary: First, the I-shaped end plates 121 are welded to the ends of the installation steel beam and the splicing steel beam 112 respectively, and the welding and fixing are conveniently completed with the help of the bevel 1211 of the end plates 121; then, a pad 141 composed of trapezoidal blocks 1411 and square blocks 1412 is placed at the first through hole 122 of the end plate 121, and the bolts 143 are passed through the second through hole 142 of the pad 141 and the first through hole 122 of the end plate 121 and the nuts 144 are tightened to put it in a pre-fixed state; then, the trapezoidal anti-shear blocks 132 with the slope of the anti-shear groove 131 and the guard plate 133 are installed in the middle of the two end plates 121. Within the shear groove 131 on the side, the shear blocks 132 are pressed against the inclined surfaces of the shear groove 131 to keep the end plates 121 flush. The guard plate 133 fits against the side of the end plate 121 to prevent the shear blocks 132 from shifting or detaching. Then, the nuts 144 of the four sets of fasteners 14 are fully tightened, so that the preload of the bolts 143 is evenly transmitted to the four corners of the end plate 121 through the pads 141. Finally, check that the shear components 13 are installed firmly, the fasteners 14 are connected reliably, and the top of the steel beam is flush, thus completing the installation of the entire node. After installation, the shear components 13 bear all the shear force, and the fasteners 14 only bear the tensile force to extend the service life of the equipment.

[0050] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A flush prefabricated bending-shear separation steel beam splicing node, characterized in that: include, The support part (1) includes a support member (11), a connector (12) disposed on the support member (11), a shear member (13) disposed on the connector (12), and a fastener (14) disposed on the connector (12). The connector (12) includes an end plate (121) and a plurality of first through holes (122) formed on the end plate (121). Shear members (13) are provided on both sides of the middle part of the end plate (121). The two end plates (121) are connected by the shear members (13). The shear members (13) are used to transfer the shear force at the beam end, making the force transmission of the structure more reasonable. The beam end fastener (14) is mainly subjected to the tensile force caused by the bending moment. The stress form of the fastener (14) is optimized, and the bearing capacity of the node under seismic load is improved.

2. The flush prefabricated bending-shear separation steel beam splicing node according to claim 1, characterized in that: Both ends of the end plate (121) are provided with bevels (1211), and the bevels (1211) are all facing the corresponding steel beam direction.

3. The flush prefabricated bending-shear separation steel beam splicing node according to claim 2, characterized in that: The support member (11) includes a mounting steel beam (111) disposed on an end plate (121) and a splicing steel beam (112) disposed on another end plate (121).

4. The flush prefabricated bending-shear separation steel beam splicing node according to claim 3, characterized in that: The shear-resistant component (13) includes an shear-resistant groove (131) formed on the end plate (121), an shear-resistant block (132) disposed on the shear-resistant groove (131), and a guard plate (133) fixedly connected to the shear-resistant block (132).

5. The flush prefabricated bending-shear separation steel beam splicing node according to claim 4, characterized in that: The shear groove (131) is provided on both sides of the middle part of the end plate (121), and the shear groove (131) is trapezoidal.

6. The flush prefabricated bending-shear separation steel beam splicing node according to claim 5, characterized in that: The shear block (132) body is a trapezoidal prism, and the guard plate (133) is fixedly connected to both sides of the shear block (132). The slope of the hypotenuse of the shear block (132) is adapted to the slope of the hypotenuse of the shear groove (131). The height of the shear block (132) is less than the depth of the shear groove (131), and the slopes of both hypotenuses are greater than the friction self-locking angle.

7. The flush prefabricated bending-shear separation steel beam splicing node according to claim 6, characterized in that: The fastener (14) includes a pad (141) disposed on the end plate (121), a second through hole (142) disposed on the pad (141), a bolt (143) disposed inside the second through hole (142), and a nut (144) threaded to the outer wall of the bolt (143).

8. The flush prefabricated bending-shear separation steel beam splicing node according to claim 7, characterized in that: The diameter of the bolt (143) is smaller than the diameter of the first through hole (122) and the second through hole (142).

9. The flush prefabricated bending-shear separation steel beam splicing node according to claim 8, characterized in that: The body of the pad (141) is composed of a trapezoidal block (1411) on the upper side and a square block (1412) on the lower side.

10. The flush prefabricated bending-shear separation steel beam splicing node according to claim 9, characterized in that: The fasteners (14) are provided in four sets, which are respectively located on the upper and lower sides of the end plate (121).

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