A steel-concrete building composite structure

Abstract

The present invention provides a steel-concrete composite building structure, which comprises a precast concrete floor slab, a steel beam and a connecting steel plate; the connecting steel plate is pre-installed at the end of the precast concrete floor slab; a clamping portion protruding downward is arranged at the bottom of the connecting steel plate; a connecting hole is arranged on the upper flange plate of the steel beam; the end of the precast concrete floor slab is lapped on the upper flange plate, and the clamping portion is inserted into the connecting hole. By providing the pre-installed connecting steel plate, the quick installation of the precast concrete floor slab and the steel beam can be realized, with small workload and high efficiency, and the connecting structure is more firm after installation.

Description

Technical Field

[0001] The present invention relates to the field of construction technology, and in particular to a steel-concrete building composite structure. Background Art

[0002] With the rapid development of China's economy, the construction industry has also developed rapidly. However, the proportion and scale of prefabricated buildings are relatively low, which does not meet the requirements of developing green buildings. Prefabricated steel structure buildings have unique advantages of being green and environmentally friendly, having a fast construction speed, and a high degree of industrialization, which greatly promotes the transformation and upgrading of the construction industry.

[0003] The existing prefabricated composite structure gives play to the advantages of steel and concrete, has good mechanical properties and certain economic benefits, but also has disadvantages such as a large amount of work, a long construction time, and a high floor height for the cast-in-place floor slab. Summary of the Invention

[0004] The purpose of the present invention is to provide a steel-concrete building composite structure to solve at least one of the above technical problems existing in the prior art.

[0005] To solve the above technical problems, a steel-concrete building composite structure provided by the present invention includes: a precast concrete floor slab, a steel beam, and a connecting steel plate;

[0006] The connecting steel plate is pre-installed at the end of the precast concrete floor slab; a clamping portion protruding downward is provided at the bottom of the connecting steel plate;

[0007] Connecting holes are provided on the upper flange plate of the steel beam;

[0008] The end of the precast concrete floor slab is lapped on the upper flange plate, and the clamping portion is inserted into the connecting hole.

[0009] By providing a pre-installed connecting steel plate in this application, the rapid installation of the precast concrete floor slab and the steel beam can be realized, with a small amount of work, high efficiency, and a more firm connection structure after installation.

[0010] Further, it further includes a connecting short plate, the connecting short plate is embedded inside the precast concrete floor slab, one side of the connecting short plate is fixedly connected with the full-length steel bars inside the precast concrete floor slab, and the other side of the connecting short plate is connected with the connecting steel plate through an intermediate connecting member.

[0011] Among them, the intermediate connecting member can be in the form of a connecting block, a connecting rod, etc. One end of the intermediate connecting member is embedded inside the precast concrete floor slab, and the other end extends out of the precast concrete floor slab and is fixedly connected with the connecting steel plate.

[0012] Further, the connecting short plate is generally arranged parallel to the connecting steel plate.

[0013] Further, steel bar holes are provided on the connecting steel plate; when two adjacent precast concrete floors are butted, the two connecting steel plates on the two precast concrete floors are arranged oppositely, and steel bars or bolts are used to pass through the steel bar holes on the two connecting steel plates, thereby fixedly connecting the two precast concrete floors.

[0014] Further, concrete tenon holes are provided on the connecting steel plate.

[0015] Further, the connecting steel plate is parallel to and spaced from the end face of the precast concrete floor.

[0016] The connecting steel plate and the end face of the precast concrete floor maintain a set interval, which can reserve an effective insertion length for the shear steel bars or bolts inserted into the steel bar holes, thereby ensuring the necessary connection strength. At the same time, when the floors are butted, a necessary operating space is reserved for screwing the nuts within the interval.

[0017] Further, a limiting plate is provided at the bottom of the upper flange plate; the limiting plate is arranged parallel to the clamping portion, and through holes are respectively provided on the limiting plate and the clamping portion; a screw rod, a bolt or a pin shaft is inserted into the through holes to connect the limiting plate and the clamping portion.

[0018] Further, a set gap is left between the connecting hole on the upper flange plate and the clamping portion for the precast concrete floor to slide relative to the steel beam.

[0019] Further, elastic materials such as rubber strips are filled in the set gap.

[0020] Further, a plurality of tooth grooves are arranged at intervals at the end of the precast concrete floor, and the connecting steel plate is arranged in the tooth grooves.

[0021] When two precast concrete floors are butted, cast-in-place concrete is filled in the middle, and the concrete can flow into the gap between the connecting steel plate and the precast concrete floor through the concrete tenon holes. The tooth groove structure at the end of the floor can effectively increase the connection strength between the two floors.

[0022] Further, the through hole of the clamping portion is a vertical long hole arranged in the height direction; the through hole of the limiting plate is a horizontal long hole arranged in the horizontal direction; the pin shaft can be slidably inserted into the vertical long hole and the horizontal long hole.

[0023] The set lengths of the vertical long hole and the horizontal long hole respectively limit the relative movement range of the precast concrete floor relative to the steel beam in the height and floor width directions. When the building vibrates or shakes, destructive damage to the precast concrete floor and the steel beam can be avoided.

[0024] Adopting the above technical solution, the present invention has the following beneficial effects:

[0025] A steel-concrete building composite structure provided by the present invention can achieve the rapid installation of a precast concrete floor slab and a steel beam by arranging pre-installed connecting steel plates, with small workload, high efficiency, and a more firm connection structure after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of the steel-concrete building composite structure provided by the embodiment of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the connecting steel plate in the embodiment;

[0029] Figure 3 It is a schematic structural diagram of the steel beam in the embodiment;

[0030] Figure 4 It is a three-dimensional view of the steel-concrete building composite structure in the embodiment;

[0031] Figure 5 It is a schematic structural diagram of the connecting steel plate in Embodiment 2 of the present invention;

[0032] Figure 6 It is a schematic structural diagram of the steel beam in Embodiment 2 of the present invention;

[0033] Figure 7 It is a schematic structural diagram of the connecting end of the precast concrete floor slab in Embodiment 3 of the present invention;

[0034] Figure 8 It is a connection schematic diagram of the connecting cover plate in Embodiment 3 of the present invention.

[0035] Reference numerals:

[0036] 10 - precast concrete floor slab; 11 - full-length reinforcement; 12 - intermediate connector; 13 - tooth groove; 20 - steel beam; 21 - upper flange plate; 21a - connection hole; 22 - web; 23 - lower flange plate; 24 - stud; 25 - limiting plate; 25a - horizontal long hole; 30 - connecting steel plate; 31 - clamping portion; 31a - vertical long hole; 32 - concrete tenon hole; 33 - bolt; 34 - nut; 35 - reinforcement hole; 40 - connecting short plate; 50 - embedded steel plate; 60 - connecting cover plate; 70 - fastener; 80 - anchor bar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] The following further explains the present invention in conjunction with specific embodiments.

[0041] Embodiment 1

[0042] As Figure 1-2 shown, a steel-concrete building composite structure provided in this embodiment includes: a precast concrete floor slab 10, a steel beam 20, and a connecting steel plate 30.

[0043] The connecting steel plate 30 is pre-installed at the end of the precast concrete floor slab 10. A clamping portion 31 protruding downward is provided at the bottom of the connecting steel plate 30.

[0044] As Figure 3 shown, the steel beam 20 includes an upper flange plate 21, a web 22, and a lower flange plate 23; a connecting hole 21a is provided on the upper flange plate 21; the end of the precast concrete floor slab 10 overlaps on the upper flange plate 21, and the clamping portion 31 is inserted into the connecting hole 21a. In addition, a plurality of stud bolts 24 are welded and fixed at intervals on the upper flange plate 21.

[0045] In this application, by providing a pre-installed connecting steel plate 30, the rapid installation of the precast concrete floor slab 10 and the steel beam 20 can be realized, with less workload and high efficiency, and the connection structure is more firm after installation.

[0046] More preferably, this embodiment further includes a connecting short plate 40, and the connecting short plate 40 is generally arranged parallel to the connecting steel plate 30. The connecting short plate 40 is embedded inside the precast concrete floor slab 10. One side of the connecting short plate 40 is fixedly connected to the full-length steel bars 11 inside the precast concrete floor slab 10, and the other side of the connecting short plate 40 is connected to the connecting steel plate 30 through an intermediate connector 12.

[0047] Preferably, the connecting short plate 40, the intermediate connector 12 and the connecting steel plate 30 are an integral structure. After pouring concrete between two precast concrete floor slabs 10, the connecting short plate 40 and the connecting steel plate 30 are respectively embedded in the precast concrete floor slab 10 and the post-cast concrete, which can effectively enhance the tensile and shear bond performance between the two concretes; and, the connecting short plate 40 and the connecting steel plate 30 can respectively become the end anchoring devices of the short steel bars in the post-cast concrete and the steel bars in the precast slab, so that the connection area can also resist the bending moment and tensile force on the concrete slab, improving the integrity of the assembled composite structure under seismic loads and not failing prematurely due to local connection failure, showing mechanical properties similar to those of a cast-in-place structure.

[0048] Among them, the intermediate connector 12 can be in the form of a connecting block, a connecting rod, etc. One end of the intermediate connector 12 is embedded in the precast concrete floor slab 10, and the other end of the intermediate connector 12 extends out of the precast concrete floor slab 10 and is fixedly connected to the connecting steel plate 30.

[0049] Furthermore, the connecting steel plate 30 is provided with a steel bar hole 35 and a concrete tenon hole 32; when two adjacent precast concrete floor slabs 10 are butted, the two connecting steel plates 30 on the two precast concrete floor slabs 10 are arranged opposite to each other, and bolts 33 are used to pass through the steel bar holes 35 on the two connecting steel plates 30, and nuts 34 are screwed at both ends of the bolts 33, thereby fixedly connecting the two precast concrete floor slabs 10. In this embodiment, the concrete tenon hole 32 is arranged at the center position of the connecting steel plate 30, and multiple steel bar holes 35 can be arranged as needed.

[0050] The connecting steel plate 30 is parallel to and spaced from the end face of the precast concrete floor slab 10. The set spacing can reserve an effective insertion length for the shear steel bars or bolts inserted into the steel bar holes 35, so as to ensure the necessary connection strength, and at the same time leave a necessary operating space for screwing the nuts within the spacing when the floor slabs are butted.

[0051] On the basis of the above technical solution, preferably, a limit plate 25 is provided at the bottom of the upper flange plate 21; the limit plate 25 is arranged in parallel with the clamping portion 31, and through holes are provided on the limit plate 25 and the clamping portion 31 respectively; a pin shaft 26 is inserted into the through hole to connect the limit plate 25 with the clamping portion 31, thereby effectively preventing the precast concrete floor 10 and the steel beam 20 from being completely separated.

[0052] Based on the above technical solution, preferably, a set gap is left between the connection hole 21a on the upper flange plate 21 and the clamping portion 31, so that the precast concrete floor 10 can slide relative to the steel beam 20. The set gap is preferably filled with elastic materials such as rubber strips.

[0053] Reference Figure 4 As shown, a plurality of tooth grooves 13 are arranged at intervals at the end of the precast concrete floor slab 10 , and the connecting steel plates 30 are arranged in the tooth grooves 13 .

[0054] The two precast concrete slabs 10 are butt-jointed and filled with cast-in-place concrete in the middle. The concrete can flow into the gap between the connecting steel plate 30 and the precast concrete slab 10 through the concrete grove 32. The tooth groove 13 structure at the end of the slab can effectively increase the connection strength between the two slabs.

[0055] The present invention can realize the rapid installation of the precast concrete floor slab 10 and the steel beam 20 by providing the preinstalled connecting steel plate 30, with small workload and high efficiency, and the connecting structure is more firm after installation.

[0056] Example 2

[0057] The structure of this embodiment is basically the same as that of embodiment 1, except that:

[0058] Reference Figure 5 As shown, the through hole of the clamping portion 31 is a vertical long hole 31a arranged along the height direction; Figure 6 As shown, the through hole on the limit plate 25 is a horizontal long hole 25a set in the horizontal direction; the pin can be relatively slidably inserted in the vertical long hole 31a and the horizontal long hole 25a. The set lengths of the vertical long hole 31a and the horizontal long hole 25a respectively limit the relative range of movement of the precast concrete floor 10 relative to the steel beam 20 in the height and floor width directions, which can prevent the precast concrete floor 10 and the steel beam 20 from destructive damage when the building vibrates or shakes.

[0059] Example 3

[0060] The structure of this embodiment is basically the same as that of embodiment 1, except that:

[0061] Reference Figure 7-8As shown in the figure, embedded steel plates 50 are preset on the top and bottom surfaces of the protruding parts on both sides of the tooth grooves 13 at the connecting ends of the precast concrete floor slabs 10. Through holes penetrating the upper and lower two embedded steel plates 50 are provided on the protruding parts of the precast concrete floor slabs 10;

[0062] And it further includes a connecting cover plate 60, and through holes are provided at both ends of the connecting cover plate 60; when the two precast concrete floor slabs 10 are butted, the two ends of the upper and lower two connecting cover plates 60 are respectively abutted against the upper and lower two embedded steel plates 50; the fastener 70 passes through the through hole and the through hole of the connecting cover plate 60 and then connects and fixes the two precast concrete floor slabs 10.

[0063] This embodiment further includes anchor bars 80, one end of the anchor bars 80 is embedded in the precast concrete floor slab 10, and the other end of the anchor bars 80 extends out of the precast concrete floor slab 10 and is fixedly connected to the embedded steel plate 50.

[0064] Specifically, the anchor bars 80 and the embedded steel plates 50 are welded in the factory, and the concrete floor slabs are precast at the same time. The embedded steel plates 50 are fixedly connected to the precast concrete floor slabs 10 through the anchor bars 80. And the fastener 70 can be a double-headed bolt and nut, a connecting pin shaft or a rivet, etc. Preferably, the fastener 70 includes a torsion-shear type high-strength bolt and a nut.

[0065] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steel-concrete building composite structure, characterized in that, Including: Precast concrete floor slabs, steel beams and connecting steel plates; The connecting steel plates are pre-installed at the ends of the precast concrete floor slabs; a clamping portion protruding downward is provided at the bottom of the connecting steel plates; Connecting holes are provided on the upper flange plates of the steel beams; The ends of the precast concrete floor slabs are lapped on the upper flange plates, and the clamping portions are inserted into the connecting holes; It further includes connecting short plates, the connecting short plates are embedded inside the precast concrete floor slabs, one side of the connecting short plates is fixedly connected with the full-length steel bars inside the precast concrete floor slabs, and the other side of the connecting short plates is connected with the connecting steel plates through intermediate connectors; Reinforcing bar holes are provided on the connecting steel plates; when two adjacent precast concrete floor slabs are butted, the two connecting steel plates on the two precast concrete floor slabs are arranged oppositely, and reinforcing bars or bolts are used to pass through the reinforcing bar holes on the two connecting steel plates, thereby fixedly connecting the two precast concrete floor slabs.

2. The steel-concrete building composite structure according to claim 1, wherein, The connecting short plates are arranged parallel to the connecting steel plates.

3. The steel-concrete building composite structure according to claim 1, characterized in that Concrete tenon holes are provided on the connecting steel plates.

4. The steel-concrete building composite structure according to claim 1, characterized in that, The connecting steel plates are parallel and spaced from the end faces of the precast concrete floor slabs.

5. The steel-concrete building composite structure according to claim 1, characterized in that, A limiting plate is provided at the bottom of the upper flange plate; the limiting plate is arranged parallel to the clamping portion, and through holes are respectively provided corresponding to the limiting plate and the clamping portion; a screw, a bolt or a pin shaft is inserted into the through holes to connect the limiting plate and the clamping portion.

6. The steel-concrete building composite structure according to claim 1, characterized in that, A set gap is left between the connecting holes on the upper flange plate and the clamping portion for the precast concrete floor slab to slide relative to the steel beam.

7. The steel-concrete building composite structure according to claim 6, wherein, An elastic material is filled in the set gap.

8. The steel-concrete building composite structure according to claim 1, characterized in that, A plurality of tooth grooves are arranged at intervals at the ends of the precast concrete floor slabs, and the connecting steel plates are arranged in the tooth grooves.

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