Prefabricated columns and steel beam connection structures

Abstract

The present invention discloses a prefabricated column and steel beam connection structure, comprising a prefabricated column and a steel beam, wherein the steel beam comprises an upper wing plate, a lower wing plate and a web plate, wherein the upper wing plate and the lower wing plate are connected by the web plate; an embedded steel plate is arranged on the top of the prefabricated column, wherein a part of the embedded steel plate is located inside the prefabricated column, and a part of the embedded steel plate protrudes from the top surface of the prefabricated column; the end of the lower wing plate is placed on the top surface of the prefabricated column, and the web plate of the steel beam and the embedded steel plate are connected by a connecting steel plate, and the connecting steel plate is simultaneously connected to the web plate and the embedded steel plate by bolts; a cast-in-place portion is provided above the prefabricated column, and the connecting steel plate and the embedded steel plate are both embedded in the cast-in-place portion. The assembled connection structure of the present invention is mainly applied to concrete high-rise and multi-story fully assembled frame structures, and this connection structure can meet the requirements of simple construction of fully assembled buildings, good quality control, rapid assembly, and shortened construction period.

Description

Technical Field

[0001] The invention relates to a prefabricated column and steel beam connection structure, belonging to the technical field of assembly. Background Art

[0002] In the prefabricated buildings with frame structures, the connection structure of prefabricated columns and prefabricated beams is complex and the construction efficiency is low. For example, the patent document with publication number CN101818521A discloses a steel node prefabricated reinforced concrete frame structure, in which the connection of prefabricated columns and prefabricated beams uses complex steel nodes, which makes the connection at the node very complicated and inefficient.

[0003] In addition, frame structure buildings usually have to face the problem that beams invade indoor usable space, especially when the floor is completely placed on top of the beams, the entire beam is located in the indoor usable space. When the floor thickness is large, the usable space is further compressed. Therefore, for frame structure buildings, how to improve space utilization is also a technical problem that the industry has been seeking to solve. Summary of the invention

[0004] In order to overcome the problems existing in the prior art, the present invention provides a prefabricated column and steel beam connection structure, which is conducive to simplifying the connection nodes of the prefabricated columns and beams and improving the construction efficiency. The specific technical solution is as follows.

[0005] The prefabricated column and steel beam connection structure comprises a prefabricated column and a steel beam, and is characterized in that:

[0006] The steel beam comprises an upper wing plate, a lower wing plate and a web plate, wherein the upper wing plate and the lower wing plate are connected via the web plate;

[0007] A pre-embedded steel plate is provided on the top of the prefabricated column, a part of the pre-embedded steel plate is located inside the prefabricated column, and a part of the pre-embedded steel plate protrudes from the top surface of the prefabricated column;

[0008] The end of the lower wing plate is placed on the top surface of the prefabricated column, the web of the steel beam and the embedded steel plate are connected by a connecting steel plate, and the connecting steel plate is simultaneously connected to the web and the embedded steel plate by bolts;

[0009] A cast-in-place portion is provided above the prefabricated column, and the connecting steel plate and the embedded steel plate are both embedded in the cast-in-place portion.

[0010] By adopting the above technical solution, after the prefabricated columns are fixed, the steel beams are hoisted and placed above the prefabricated columns, the embedded steel plates and the webs of the steel beams are connected by connecting steel plates, and then concrete is poured above the prefabricated columns to form a cast-in-place part. The construction method is very simple and efficient, avoiding complex structures at the connection nodes, saving costs and improving efficiency.

[0011] Furthermore, the steel beam is an I-beam steel beam, and the upper wing plate and the lower wing plate of the steel beam are symmetrically arranged about the plane where the web plate is located;

[0012] Or the upper wing plate of the steel beam is parallel to the lower wing plate, the upper wing plate and the lower wing plate are connected by two web plates, the two web plates are parallel to each other, the upper wing plate is located directly above the lower wing plate and the width of the upper wing plate is smaller than the width of the lower wing plate, the upper wing plate and the two web plates are integrally formed, and the cross section of the structure formed by the upper wing plate and the two web plates together is an inverted U-shape. That is, the steel beam is roughly a "J"-shaped steel beam.

[0013] Further, when viewed from the vertical direction, the embedded steel plate is in an L-shape, a T-shape, a cross shape, a double cross shape or a tic-tac-toe shape. Different types of embedded steel plates are used to connect steel beams of different numbers and types.

[0014] Furthermore, the upper wing plate is provided with a notch, the notch is located on both sides of the web, and the width of the portion of the upper wing plate having the notch is smaller than the width of the lower wing plate corresponding to the notch below the notch;

[0015] The prefabricated column and steel beam connection structure also includes a prefabricated floor slab, which includes an upper wing floor slab and reinforcing ribs. The reinforcing ribs are located on the lower surface of the upper wing floor slab, and the ends of the upper wing floor slab are supported on the upper wing plate of the steel beam. The ends of the reinforcing ribs are supported on the lower wing plate of the steel beam, and the reinforcing ribs pass through the gap to avoid the upper wing plate of the steel beam.

[0016] The setting of the reinforcing ribs is conducive to maintaining or enhancing the strength of the entire prefabricated floor slab on the basis of reducing the thickness of the upper wing floor slab, which is conducive to fully utilizing the indoor space. At the same time, the prefabricated floor slab can be positioned by using the gaps in the steel beams, which greatly simplifies the installation and positioning of the prefabricated floor slab and further helps to improve construction efficiency.

[0017] Furthermore, the steel beam further comprises a reinforcing plate, which is welded and fixedly connected to the upper wing plate, the lower wing plate and the web plate at the same time. The reinforcing plate is beneficial to enhancing the overall strength of the steel beam.

[0018] Furthermore, steel bars are arranged in the reinforcing ribs, which are beneficial to enhancing the bearing capacity of the reinforcing ribs.

[0019] Furthermore, the upper wing floor plate and the reinforcing ribs are integrally formed. Preferably, the upper wing floor plate and the reinforcing ribs are both made of concrete or ultra-high performance concrete.

[0020] Furthermore, the cross-section of the reinforcing ribs is in an inverted trapezoidal shape, which is more conducive to reducing weight and facilitates the reinforcing ribs to be inserted into the notches of the steel beams.

[0021] Furthermore, the prefabricated column also includes vertical steel bars, the top ends of which protrude from the upper surface of the prefabricated column, and the bottom ends of which are fixedly connected to grouting sleeves, which are located at the bottom of the prefabricated column; when the upper prefabricated column is connected to the lower prefabricated column, the top ends of the vertical steel bars of the lower prefabricated column extend into the grouting sleeves at the bottom of the upper prefabricated column. The upper prefabricated column and the lower prefabricated column are connected by the grouting sleeves, and the structure is simple and reliable.

[0022] The assembled connection structure of the present invention is mainly used for concrete high-rise and multi-story fully assembled frame structures. This connection structure can meet the requirements of simple construction of fully assembled buildings, good quality control, rapid assembly, and shortened construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the prefabricated column and steel beam connection structure of Example 1 of the present invention (horizontal cross section, without prefabricated floor slab);

[0024] Figure 2 Schematic diagram of the connection structure of prefabricated columns and steel beams according to Example 1 of the present invention (horizontal cross section, illustrating the prefabricated floor slab);

[0025] Figure 3 is a schematic diagram of an I-beam steel beam of unequal width in Example 1 of the present invention;

[0026] Figure 4 is a schematic diagram of a notched I-beam steel beam in Example 1 of the present invention;

[0027] Figure 5 is a schematic diagram of the prefabricated floor slab in Example 1;

[0028] Figure 6 Schematic diagram of the connection structure of prefabricated columns and steel beams according to Example 2 of the present invention (horizontal cross section, without illustrating the prefabricated floor slab);

[0029] Figure 7 It is a schematic diagram of the I-shaped steel beam in Example 2 of the present invention.

[0030] In the figure: precast column 1, steel beam 2, upper wing plate 2.1, lower wing plate 2.2, web plate 2.3, notch 2.4, reinforcing plate 2.5, precast floor slab 3, upper wing floor slab 3.1, reinforcing rib 3.2, steel bar 3.3, vertical steel bar 4, bolt 5, cast-in-place part 6, embedded steel plate 7, connecting steel plate 8. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0032] Example 1

[0033] See attached picture Figure 1-Figure 5, a prefabricated column and steel beam connection structure, comprising a prefabricated column 1, a steel beam 2 and a prefabricated floor slab 3:

[0034] The precast column 1 is a reinforced concrete precast column, which includes vertical steel bars 4. The top of the vertical steel bars 4 protrudes from the top surface of the precast column 1. The bottom of the vertical steel bars 4 is fixedly connected to a grouting sleeve (not shown), which is located at the bottom of the precast column 1. When the upper precast column 1 is connected to the lower precast column 1, the top of the vertical steel bars 4 of the lower precast column 1 extends into the grouting sleeve at the bottom of the upper precast column 1. The top of the precast column 1 is provided with an embedded steel plate 7, a part of which is located inside the precast column 1, and a part of which protrudes from the top surface of the precast column 1. Figure 1-Figure 2 The embedded steel plate is in a cross shape (viewed in the vertical direction). Those skilled in the art will appreciate that when the prefabricated column 1 is connected to two steel beams 2 or three steel beams 2, the embedded steel plate may be in an L-shape or a T-shape.

[0035] like Figure 1 , Figure 3 As shown, the steel beams 2 connected to the precast columns 1 are two types of I-beams, one of which includes an upper wing plate 2.1, a lower wing plate 2.2 and a web 2.3. The upper wing plate 2.1 and the lower wing plate 2.2 are connected by the web 2.3, and the upper wing plate 2.1 is wider than the lower wing plate 2.2, which can be called unequal width steel beams. The unequal width steel beams connect the precast columns 1 in the longitudinal direction.

[0036] like Figure 1 , Figure 4 As shown, another steel beam 2 includes an upper wing plate 2.1, a lower wing plate 2.2 and a web 2.3. The upper wing plate 2.1 and the lower wing plate 2.2 are connected by the web 2.3. The upper wing plate 2.1 and the lower wing plate 2.2 are symmetrically arranged about the plane where the web 2.3 is located. The upper wing plate 2.1 is provided with a notch 2.4. The notch 2.4 is located on both sides of the web 2.3. The width of the portion of the upper wing plate 2.1 with the notch 2.4 is smaller than the width of the lower wing plate 2.2 corresponding to the lower portion of the notch 2.4. The steel beam 2 also includes a reinforcing plate 2.5. The reinforcing plate 2.5 is welded and fixedly connected to the upper wing plate 2.1, the lower wing plate 2.2 and the web 2.3 at the same time. The notch-type steel beam is connected to the prefabricated column 1 in the transverse direction.

[0037] like Figure 5 As shown, the prefabricated floor 3 includes an upper wing floor 3.1 and a reinforcing rib 3.2. The reinforcing rib 3.2 is located on the lower surface of the upper wing floor 3.1, and a steel bar 3.3 is arranged in the reinforcing rib 3.2. The steel bar 3.3 is conducive to enhancing the bearing capacity of the reinforcing rib 3.2; preferably, the upper wing floor 3.1 and the reinforcing rib 3.2 are integrally formed. Preferably, the upper wing floor 3.1 and the reinforcing rib 3.2 are both made of concrete or ultra-high performance concrete.

[0038] During construction, the steel beam 2 is hoisted above the prefabricated column 1, the end of the lower wing plate 2.2 is placed on the top surface of the prefabricated column 1, the web 2.3 of the steel beam 2 is connected to the embedded steel plate 7, and the embedded steel plate 7 and the web 2.3 of the steel beam 2 are connected by connecting the steel plate 8. The connecting steel plate 8 is simultaneously connected to the web 2.3 and the embedded steel plate 7 by bolts 5, and then concrete is poured above the prefabricated column 1 to form a cast-in-place part 6. The connecting steel plate 8 and the embedded steel plate 7 are both buried in the cast-in-place part 6. The construction method is very simple and efficient, avoiding the complex structure at the connection node, saving costs and improving efficiency.

[0039] After the steel beam 2 and the prefabricated column 1 are connected, the prefabricated floor 3 is hoisted so that the end of the upper wing floor 3.1 of the prefabricated floor 3 is supported on the upper wing 2.1 of the steel beam 2, the end of the reinforcing rib 3.2 is supported on the lower wing 2.2 of the steel beam 2, and the reinforcing rib 3.2 passes through the notch 2.4 to avoid the upper wing 2.1 of the steel beam 2. Preferably, the cross-section of the reinforcing rib 3.2 is in an inverted trapezoidal shape, and the inverted trapezoidal reinforcing rib 3.2 is more conducive to reducing weight and facilitating the reinforcing rib 3.2 to be inserted into the notch 2.4 of the steel beam 2. The provision of the reinforcing rib 3.2 is conducive to maintaining or enhancing the strength of the entire prefabricated floor 3 on the basis of reducing the thickness of the upper wing floor 3.1, which is conducive to fully using the indoor space. At the same time, the prefabricated floor 3 can be positioned by using the notch 2.4 of the steel beam 2, which greatly simplifies the installation and positioning of the prefabricated floor 3, and further helps to improve construction efficiency.

[0040] By adopting the scheme of the present invention, a concrete high-rise and multi-story fully assembled frame structure can be realized conveniently and quickly, the quality is well controlled, the assembly can be done quickly, and the construction period is shortened.

[0041] It should be noted that the prefabricated floor 3 can also be a common flat-plate prefabricated floor. When installing the prefabricated floor, the prefabricated floor is placed on the upper wing 2.1 of the steel beam 2. At the same time, the type of the steel beam 2 can also be selected according to needs, such as Figure 1 , Figure 2 As shown, the steel beams 2 in the transverse direction and the longitudinal direction respectively use notched I-beams and unequal width I-beams. This is because the transverse direction bears more loads, and setting unequal width I-beams in the longitudinal direction can save steel and reduce weight.

[0042] Example 2

[0043] like Figure 6 , Figure 7 As shown, the difference from Example 1 is that the steel beams in the transverse direction adopt I-shaped steel beams, and the corresponding prefabricated floor slabs adopt ordinary flat-plate prefabricated floor slabs (not shown).

[0044] like Figure 7As shown, the upper wing plate 2.1 of the "J"-shaped steel beam 2 is parallel to the lower wing plate 2.2, the upper wing plate 2.1 and the lower wing plate 2.2 are connected by two webs 2.3, the two webs 2.3 are parallel to each other, the upper wing plate 2.1 is located directly above the lower wing plate 2.2 and the width of the upper wing plate 2.1 is smaller than the width of the lower wing plate 2.2, the upper wing plate 2.1 and the two webs 2.3 are integrally formed, and the cross-section of the structure formed by the upper wing plate 2.1 and the two webs 2.3 together is an inverted U-shape.

[0045] like Figure 6 As shown, the steel beam connected to the prefabricated column 1 in the transverse direction is a steel beam 2 in the shape of a cross, and the steel beam connected to the prefabricated column 1 in the longitudinal direction is a steel beam 2 of unequal width. Both webs 2.3 of the steel beam 2 in the shape of a cross are connected to the embedded steel plate 7 through a connecting steel plate 8, and the embedded steel plate 7 is in a double cross shape when viewed from the vertical direction. It can be understood by those skilled in the art that when the steel beam 2 in the shape of a cross is used in both the transverse and longitudinal directions, the embedded steel plate 7 is in a well shape when viewed from the vertical direction.

[0046] The embodiments of the present invention are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention is not limited to the above-mentioned specific implementations, which are merely illustrative and not restrictive. Under the enlightenment of the present invention, those skilled in the art can also make many forms without departing from the scope of protection of the present invention and the claims, all of which belong to the protection scope of the present invention.

Claims

1. A prefabricated column and steel beam connection structure, comprising a prefabricated column (1) and a steel beam (2), characterized in that: The steel beam (2) comprises an upper wing plate (2.1), a lower wing plate (2.2) and a web plate (2.3), wherein the upper wing plate (2.1) and the lower wing plate (2.2) are connected via the web plate (2.3); A pre-buried steel plate (7) is provided on the top of the prefabricated column (1), a portion of the pre-buried steel plate (7) is located inside the prefabricated column (1), and a portion of the pre-buried steel plate (7) protrudes from the top surface of the prefabricated column (1); The end of the lower wing plate (2.2) is placed on the top surface of the prefabricated column (1), the web plate (2.3) of the steel beam (2) and the embedded steel plate (7) are connected via a connecting steel plate (8), and the connecting steel plate (8) is simultaneously connected to the web plate (2.3) and the embedded steel plate (7) via bolts; A cast-in-place portion (6) is provided above the prefabricated column (1), and the connecting steel plate (8) and the embedded steel plate (7) are both embedded in the cast-in-place portion (6); The steel beam (2) is an I-beam steel beam (2), and the upper wing plate (2.1) and the lower wing plate (2.2) of the steel beam (2) are both symmetrically arranged about the plane where the web plate (2.3) is located; The upper wing plate (2.1) is provided with a notch (2.4), the notch (2.4) being located on both sides of the web (2.3), and the width of the portion of the upper wing plate (2.1) having the notch (2.4) being smaller than the width of the lower wing plate (2.2) corresponding to the notch (2.4); The prefabricated column and steel beam connection structure also includes a prefabricated floor slab (3), the prefabricated floor slab (3) including an upper wing floor slab (3.1) and a reinforcing rib (3.2), the reinforcing rib (3.2) being located on the lower surface of the upper wing floor slab (3.1), the end of the upper wing floor slab (3.1) being supported on the upper wing plate (2.1) of the steel beam (2), the end of the reinforcing rib (3.2) being supported on the lower wing plate (2.2) of the steel beam (2), and the reinforcing rib (3.2) passing through the notch (2.4) to avoid the upper wing plate (2.1) of the steel beam (2).

2. The prefabricated column and steel beam connection structure according to claim 1, characterized in that: When viewed from the vertical direction, the embedded steel plate (7) is in an L-shape, a T-shape, a cross shape, a double cross shape or a tic-tac-toe shape.

3. The prefabricated column and steel beam connection structure according to claim 1, characterized in that: Steel bars (3.3) are arranged inside the reinforcing ribs (3.2).

4. The prefabricated column and steel beam connection structure according to claim 1, characterized in that: The upper wing floor slab (3.1) and the reinforcing ribs (3.2) are both made of concrete.

5. The prefabricated column and steel beam connection structure according to claim 1, characterized in that: The cross-sections of the reinforcing ribs (3.2) are all in the shape of an inverted trapezoid.

6. The prefabricated column and steel beam connection structure according to claim 1, characterized in that: The prefabricated column (1) further comprises a vertical steel bar (4), the top end of the vertical steel bar (4) protruding from the upper surface of the prefabricated column (1), the bottom end of the vertical steel bar (4) being fixedly connected to a grouting sleeve, and the grouting sleeve being located at the bottom of the prefabricated column (1); when the upper prefabricated column (1) and the lower prefabricated column (1) are connected, the top end of the vertical steel bar (4) of the lower prefabricated column (1) extends into the grouting sleeve at the bottom of the upper prefabricated column (1).

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