Assembly type perforated plate connecting piece suitable for composite beam with bearing

Abstract

The invention discloses an assembly type perforated plate connecting piece suitable for a composite beam with a bearing, and relates to the technical field of bridge engineering.The assembly type perforated plate connecting piece is installed on a steel beam and comprises an I-shaped perforated steel plate in an I shape and a penetrating reinforcing steel bar; the I-shaped perforated steel plate comprises a horizontally-arranged bottom plate and two top plates, the two top plates are arranged at the same height, the bottom plate and the two top plates are connected through two vertically-arranged web plates, and the extending direction of the bottom plate, the extending direction of the top plates and the extending direction of the web plates are consistent with the span direction of the I-shaped steel beam. An upper row of holes and a lower row of spacing steel plates are uniformly distributed on the two web plates in the extending direction; the holes are used for placing penetrating steel bars; the spacing steel plates are used for spacing two horizontally adjacent holes; the assembly type perforated plate connecting piece is installed on the I-shaped steel beam through the I-shaped perforated steel plate. According to the connecting piece, the connecting reliability can be guaranteed, the shear strength and the shear rigidity of the connecting piece can be improved, and therefore overall deformation of the composite beam is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to an assembled perforated plate connector suitable for supporting composite beams. Background Art

[0002] Steel-concrete composite beams are a novel structure developed from the perspectives of steel and concrete, combining the characteristics of both. Steel-concrete composite beams utilize concrete flanges in the compression zone and steel beams in the tension zone, connected by shear connectors. In recent years, in-depth research on composite beams has revealed that these beams, combining the advantages of both steel and concrete, offer significant economic, technical, and social benefits, attracting significant attention in the field of small and medium-span bridges.

[0003] When the concrete flanges of composite beams are constructed using conventional reinforced concrete slabs, concrete supports can be installed to improve the cross-sectional bending capacity of the composite beam and conserve steel. A support is a localized, enlarged concrete section between the concrete flange and the upper flange of the steel beam. Supports are sometimes designed to accommodate larger shear connectors, while other times are necessary due to limited space. The installation of supports has a certain impact on the structural performance of the composite beam, improving the cross-sectional bending and torsional stiffness. The installation of supports significantly influences both the cross-sectional bending capacity of the beam and the vertical shear capacity of the composite section.

[0004] Shear connectors have the function of bearing the shear force at the interface between steel and concrete in composite structures. The shear bearing capacity of shear connectors directly affects the bearing capacity of composite structures. At present, the most commonly used shear connectors in actual engineering are studs. Studs have good force-bearing performance and are easy to construct, but they are large in number and are very difficult to weld and construct. Compared with traditional studs, perforated plate shear connectors have higher bearing capacity and good fatigue resistance. However, for composite beams with supports, the arrangement of the through steel bars arranged on the perforated plate shear connectors will be restricted by the concrete support structure and the construction is difficult. Traditional perforated plate shear connectors are no longer suitable for composite beams with supports. Therefore, it is very necessary to design a shear connector that can be applied to composite beams with supports. Summary of the Invention

[0005] In view of the above problems in the prior art, the present invention provides an assembled perforated plate connector suitable for supporting composite beams to solve the technical problem of the difficulty in arranging the existing perforated plate shear connector to penetrate the steel bars.

[0006] The technical solution adopted in the present invention is as follows:

[0007] The invention relates to an assembled perforated plate connector suitable for a supporting composite beam, wherein the assembled perforated plate connector is installed on an I-beam, and comprises an I-shaped perforated steel plate and a through-steel bar. The I-shaped perforated steel plate comprises a horizontally arranged bottom plate and two top plates, the two top plates are arranged at the same height, the bottom plate and the two top plates are connected by two vertically arranged web plates, the extension direction of the bottom plate, the top plate and the web plate is consistent with the span direction of the I-beam, and the two web plates are evenly provided with two upper and lower rows of holes for placing through-steel bars and a spacer steel plate separating two horizontally adjacent holes along the extension direction; the assembled perforated plate connector is installed on the I-beam through the I-shaped perforated steel plate.

[0008] In the present invention, the spacing of the spacer steel plate in the middle of the web of the I-shaped perforated steel plate and the through steel bars significantly increases the pressure-bearing area of ​​the connector, and two layers of through steel bars are arranged on the I-shaped perforated steel plate, which greatly improves the shear bearing capacity; by arranging holes for placing through steel bars on the two webs, the through steel bars can be placed smoothly on the assembled perforated plate connector in advance before pouring cement slurry, which is convenient for on-site construction.

[0009] Preferably, the I-shaped perforated steel plate is fixedly connected to the I-shaped steel beam by high-strength bolts, so that the component is firm and reliable.

[0010] Furthermore, the bottom plate of the I-shaped perforated steel plate and the top plate of the I-shaped steel beam are both uniformly provided with a plurality of bolt holes for connection with high-strength bolts along the span direction of the I-shaped steel beam, and can be used in conjunction with high-strength bolts.

[0011] Preferably, the two top plates of the I-shaped perforated steel plate have the same shape and size, the length of the two top plates is consistent with the length of the bottom plate of the I-shaped perforated steel plate, the sum of the total width of the two top plates and the gap between the two top plates is consistent with the width of the bottom plate of the I-shaped perforated steel plate, the outer edges of the two top plates are flush with the outer edges of the bottom plate of the I-shaped perforated steel plate, and the structure is stable.

[0012] Preferably, the length of the through-steel bars installed in the upper holes of the I-shaped perforated steel plate is greater than the through-steel bars installed in the lower holes, which greatly improves the shear bearing capacity.

[0013] In summary, compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] The assembled perforated plate connector provided by the present invention has an I-shaped perforated steel plate combined with a steel beam to form a whole, which can deform synergistically under the action of load, giving full play to the advantages of the combined structure. The spacing steel plate in the middle of the web of the I-shaped perforated steel plate and the spacing of the through-steel bars significantly increase the bearing area of ​​the connector, and two layers of through-steel bars are arranged on the I-shaped perforated steel plate, which greatly improves the shear bearing capacity. The two top plates provided on the I-shaped perforated steel plate have a pull-out resistance and can effectively suppress the lifting effect between the concrete slab and the steel beam. The horizontal shear force is jointly borne by the two concrete tenons and the spacing steel plate formed by the upper and lower through-steel bars, and the pull-out force is jointly resisted by the reinforced concrete tenons and the top plate of the I-shaped perforated steel plate. The I-shaped perforated steel plate can be prefabricated in the factory and only needs to be assembled with the steel beam during construction, reducing the difficulty of construction. The present invention can not only ensure the reliability of the connection, but also improve the shear strength and shear stiffness of the connector, thereby reducing the overall deformation of the composite beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the present invention and the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the present invention and the prior art. The drawings described below are only some implementation cases of the present invention, among which:

[0016] Figure 1 A schematic diagram of the application of the assembled perforated plate connector provided by the present invention in a composite beam;

[0017] Figure 2 It is a structural diagram of an I-beam;

[0018] Figure 3 This is a schematic diagram of the structure of the assembled perforated plate connector provided by the present invention after being assembled with an I-beam, a through-steel bar, and a high-strength bolt assembly;

[0019] Figure 4 This is a schematic diagram of the structure of the assembled perforated plate connector provided by the present invention after assembly with the through-steel bar and high-strength bolt assembly;

[0020] Figure 5 A schematic structural diagram of the assembled perforated plate connector provided by the present invention;

[0021] Figure 6 Schematic diagram of the structure of a high-strength bolt assembly;

[0022] The numbers in the figure are: 1. Concrete slab; 2. I-beam; 3. I-shaped perforated steel plate; 4. High-strength bolt assembly; 5. Upper through-steel bars; 6. Lower through-steel bars; 7. Spacer steel plate at the web; 8. High-strength bolt holes in the top plate of the steel beam; 9. High-strength bolt holes in the bottom plate of the I-shaped perforated steel plate; 10. Holes in the I-shaped perforated steel plate. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and various embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. That is, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0024] Example 1

[0025] Reference Figure 1 and Figure 5 The present invention provides a composite beam comprising: a concrete slab 1, an I-beam 2, an I-shaped perforated steel plate 3 (such as Figure 5 As shown), high strength bolt assembly 4 (as Figure 6 As shown), the upper layer penetrates the steel bar 5, the lower layer penetrates the steel bar 6, the web is spaced at the steel plate 7, the steel beam top plate high-strength bolt holes 8, the I-shaped perforated steel plate bottom plate high-strength bolt holes 9, and the I-shaped perforated steel plate holes 10.

[0026] Reference Figure 3 and Figure 4 The present invention is a novel assembled perforated plate connector, and the assembled perforated plate connector is used in conjunction with: an I-beam beam 2 and a high-strength bolt assembly 4.

[0027] Reference Figure 2 、 Figure 3 In the present invention, a row of high-strength bolt holes 8 are reserved on the top plates on both sides of the web of the I-beam 2, and the high-strength bolt holes 8 are evenly distributed along the span direction. The high-strength bolt holes 8 on the top plates of the I-beam correspond to the size and position of the high-strength bolts 4; the I-shaped perforated steel plate 3 is also provided with high-strength bolt holes 9 on the bottom plates at the corresponding positions of the bottom plates, so as to facilitate the connection between the I-shaped perforated steel plate 3 and the I-beam 2 through the high-strength bolt assembly 4.

[0028] Reference Figure 3 、 Figure 4 During installation, the high-strength bolt holes 9 in the bottom plate of the I-shaped perforated steel plate 3 are first aligned one-to-one with the high-strength bolt holes 8 in the top plate of the I-beam 2. High-strength bolt assemblies 4 are then used to secure the corresponding high-strength bolt holes, effectively connecting the I-beam 2 and the I-shaped perforated steel plate 3. After the I-shaped perforated steel plate 3 is installed, the upper layer of through-steel bars 5 and the lower layer of through-steel bars 6 are installed. Once both layers of through-steel bars are installed, concrete pouring can begin.

[0029] The thickness of the I-shaped perforated steel plate 3, the aperture of the perforated plate, the number of holes, the diameter of the through-steel bars, etc. are adjusted according to the stress characteristics of the structure.

[0030] Working principle of the present invention:

[0031] like Figure 1 As shown, on the I-beam 2, the I-shaped perforated steel plate 3 is positioned and installed, and is connected by a high-strength bolt assembly 4, which can effectively limit the relative rotation and slippage of the I-shaped perforated steel plate 3 and the I-beam 2, and avoid losing working ability due to slippage of the assembled I-shaped perforated steel plate 3 and the I-beam 2 under the action of load; and the use of high-strength bolt assembly 4 for connection facilitates the installation and disassembly of the I-shaped perforated steel plate 3 and the I-beam 2; a web spacer steel plate 7 is provided in the middle of the web of the I-shaped perforated steel plate 3, and the horizontal shear force is generated by the two concrete tenons and The spacer steel plates 7 at the web share the burden. Compared with traditional perforated plate connectors, the assembled perforated plate connector provided in this embodiment significantly increases the bearing area, improves the shear bearing capacity, and improves the durability of the structure; the pull-out force is jointly resisted by the reinforced concrete tenon and the top plate of the I-shaped perforated steel plate 3, which can prevent the separation of the concrete plate and the I-shaped steel beam 2; the I-shaped perforated steel plate 3 can be prefabricated in the factory and only needs to be assembled with high-strength bolts during construction; the present invention can not only ensure the reliability of the connection, but also improve the shear strength and shear stiffness of the connector, thereby reducing the overall deformation of the composite beam.

[0032] The above-described embodiments merely represent specific implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of protection of the present application. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the technical concept of the present application, and all such variations and improvements fall within the scope of protection of the present application.

Claims

1. A prefabricated perforated plate connector suitable for supporting composite beams, wherein the prefabricated perforated plate connector is installed on an I-beam, characterized in that: The assembled perforated plate connector includes an I-shaped perforated steel plate and through-steel bars. The I-shaped perforated steel plate includes a horizontally arranged bottom plate and two top plates. The two top plates are arranged at the same height. The bottom plate and the two top plates are connected by two vertically arranged webs. The extension direction of the bottom plate, the top plate and the web is consistent with the span direction of the I-steel beam. The two webs are evenly distributed with two upper and lower rows of holes for placing through-steel bars and spacer steel plates separating two horizontally adjacent holes along the extension direction. The assembled perforated plate connector is installed on the I-steel beam through the I-shaped perforated steel plate.

2. The assembled perforated plate connector according to claim 1, wherein: The I-shaped perforated steel plate is fixedly connected to the I-shaped steel beam by high-strength bolts.

3. The assembled perforated plate connector according to claim 2, wherein: The bottom plate of the I-shaped perforated steel plate and the top plate of the I-shaped steel beam are both uniformly provided with a plurality of bolt holes for connection with high-strength bolts along the span direction of the I-shaped steel beam.

4. The assembled perforated plate connector according to claim 1, wherein: The two top plates of the I-shaped perforated steel plate have the same shape and size, the length of the two top plates is consistent with the length of the bottom plate of the I-shaped perforated steel plate, the sum of the total width of the two top plates and the gap between the two top plates is consistent with the width of the bottom plate of the I-shaped perforated steel plate, and the outer edges of the two top plates are flush with the outer edges of the bottom plate of the I-shaped perforated steel plate.

5. The assembled perforated plate connector according to claim 1, wherein: The length of the through-steel bars installed in the upper holes of the I-shaped perforated steel plate is greater than the length of the through-steel bars installed in the lower holes.

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