A precast beam and an assembled beam-column joint structure

Abstract

The present invention relates to a precast beam and an assembled beam-column joint structure, which includes a beam body. Both ends of the beam body are provided with beam end plates. The beam end plates are provided with a plurality of first fixing holes. The beam end plates are arranged at a set acute angle with the axis of the beam body. The distance between the tops of the end plates at both ends of the beam body is greater than the distance between the bottoms, so that the planes where the two beam end plates are located can intersect to form a V-shaped structure. The hoisting construction of the precast beam of the present invention is convenient and fast, and the construction progress is accelerated.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly relates to a precast beam and an assembled beam-column joint structure. Background Art

[0002] The statements herein only provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] An assembled building refers to a building that is fabricated with building components and fittings at the construction site, such as joints, precast beams, and precast columns, and then transported to the construction site and assembled on-site in a reliable manner. Assembled buildings have the advantages of fast construction speed and high quality. In current assembled buildings, the precast beam is fixed to the flange plate at the joint through a flange and bolts to achieve the fixation between the precast beam and the precast column. For example, in the technical solution disclosed in Patent CN115182446A, the axis of the mounting seat is perpendicular to the axis of the precast column, that is, parallel to the axis of the precast beam. The inventor found that when hoisting the precast beam in this way, if there is an installation position error in the adjacent joints of a precast beam, it is very difficult to hoist the precast beam into the space between the two joints. Therefore, there are high requirements for the installation position accuracy of the joints, increasing the construction difficulty. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a precast beam, which is convenient to be hoisted into the space between two adjacent joint components during construction, reducing the hoisting difficulty and accelerating the construction progress.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a precast beam, including a beam body. Beam end plates are provided at both ends of the beam body. The beam end plates are provided with a plurality of first fixing holes. The beam end plates are arranged at a set acute angle with the axis of the beam body. The distance between the tops of the beam end plates at both ends of the beam body is greater than the distance between the bottoms, so that the planes where the two beam end plates are located can intersect to form a V-shaped structure.

[0007] Optionally, the included angles between the beam end plates at both ends of the beam body and the axis of the beam body are equal.

[0008] Optionally, the set acute angle is 70° - 80°.

[0009] Optionally, the beam body adopts a reinforced concrete structure and has a steel reinforcement cage inside.

[0010] Optionally, a sleeve is provided on the end face of the beam end plate connected to the beam body. The sleeve is buried inside the beam body, and the ends of the longitudinal steel bars in the steel reinforcement cage inside the beam body are fixed to the outer side face of the sleeve.

[0011] In a second aspect, an embodiment of the present invention provides an assembled beam-column joint structure, including a joint component, a precast column, and the precast beam described in the first aspect. The joint component includes a joint body. The top and / or bottom of the joint body is connected to the precast column through a column fixing plate. A beam fixing plate matching the beam end plate is provided on the side of the joint body. The beam fixing plate forms a set acute angle with the axis of the precast beam, and the beam fixing plate is fixed to the beam end plate to realize the fixation of the precast beam and the joint component.

[0012] Optionally, a column end plate is provided at the end of the precast column. The column end plate is provided with a second fixing hole, and the column end plate is fixed to the column fixing plate through the second fixing hole and a threaded fixing member to realize the fixation of the precast column and the joint component.

[0013] Optionally, the column end plate is arranged perpendicular to the axis of the precast column.

[0014] Optionally, the precast column includes a column body. A column end plate is provided at the end of the column body. The column body adopts a reinforced concrete structure and has a steel reinforcement cage inside. A sleeve embedded in the column body is provided on the end face of the column end plate connecting the column body, and the longitudinal steel bars in the steel reinforcement cage inside the column body are fixed to the outer side face of the sleeve.

[0015] Optionally, the joint body includes a column connecting member, a first beam connecting member, and a second beam connecting member. The column connecting member, the first beam connecting member, and the second beam connecting member are orthogonally fixed to each other pairwise. Column fixing plates are provided at both ends of the column connecting member, and beam fixing plates are provided at both ends of the first beam connecting member and the second beam connecting member.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. In the precast beam and joint structure of the present invention, the beam end plates at both ends of the beam body are arranged at a set acute angle with the axis of the beam body, so that the planes where the beam end plates at both ends are located form a V-shaped structure. Moreover, the beam fixing plate of the joint component matches the beam end plate, so that a V-shaped space is formed between adjacent two joint components, which is convenient for hoisting the entire precast beam into the space between adjacent two joint components, reduces the accuracy requirement for the installation position of the joint component, and reduces the construction difficulty.

[0018] 2. In the precast beam and precast column of the present invention, when the beam body and the column body adopt a reinforced concrete structure, sleeves embedded in the concrete are provided on the beam end plate and the column end plate, realizing the fixation of the beam end plate and the beam body, and the fixation of the column end plate and the main body. At the same time, the longitudinal steel bars in the steel reinforcement cages in the beam body and the column body are welded and fixed to the outer side face of the sleeve. Compared with the traditional connection method of longitudinal steel bars in concrete beams and concrete columns using grouting sleeves, the phenomenon of incomplete grouting is avoided, the integrity of the joint structure is ensured, and wet operations such as grouting are avoided, accelerating the construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings of the specification, which form a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0020] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0021] Figure 2 is a schematic diagram of the fixation of the sleeve and the beam end plate in Embodiment 1 of the present invention;

[0022] Figure 3 is a schematic diagram of the welding of the sleeve and the longitudinal reinforcement in Embodiment 1 of the present invention;

[0023] Figure 4 is a schematic diagram of the structure of the node component in Embodiment 2 of the present invention;

[0024] Figure 5 is a schematic diagram of the node structure in Embodiment 2 of the present invention;

[0025] Among them, 1. sleeve, 2. beam end plate, 3. first fixing hole, 4. longitudinal reinforcement, 5. weld, 6. beam body, 7. column fixing plate, 8. fourth fixing hole, 9. beam fixing plate, 10. third fixing hole, 11. column connecting piece, 12. first beam connecting piece, 13. precast column, 14. nut. Detailed implementation manners

[0026] For the convenience of narration, if the words "upper" and "lower" appear in the present invention, they only represent the same as the upper and lower directions of the accompanying drawings themselves, and do not limit the structure. 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, so it cannot be understood as a limitation of the present invention.

[0027] Embodiment 1

[0028] This embodiment provides a precast beam, as Figures 1 - 3 shown, including a beam body 6. Beam end plates 2 are provided at both ends of the beam body 6. Both beam end plates 2 are arranged at a set acute angle with the axis of the beam body 6, and the distance between the tops of the two beam end plates 2 is greater than the distance between the bottoms, so that the planes where the two beam end plates 2 are located can intersect to form a V-shaped structure.

[0029] In this embodiment, the area of the beam end plate 2 is larger than the cross-sectional area of the beam body 6. A plurality of first fixing holes 3 are provided in the peripheral area of the covering area of the beam body 6 on the beam end plate 2. The beam end plate 2 can be fixed to the node component through the first fixing holes 3 and threaded fixing members. In this embodiment, the threaded fixing members adopt bolts and nuts, so the size of this peripheral area should leave an installation space for the nuts.

[0030] In this embodiment, the planes where the two beam end plates of the beam body 6 are located form a V-shaped structure bifurcated upward. Correspondingly, during construction, a matching V-shaped space is also formed between adjacent two node components. When the precast beam is hoisted from top to bottom, it is convenient to hoist the precast beam into the installation space between adjacent two node components, and it has an adaptive adjustment function, enabling the two beam end plates to adaptively cooperate with the node components, reducing the requirement for the installation position accuracy of the node components, reducing the construction difficulty, and accelerating the construction progress.

[0031] In this embodiment, the set acute angle between the axis of the beam body 6 and the beam end plate 2 is 70° - 80°, which can be set by those skilled in the art according to actual needs.

[0032] The beam end plates 2 at both ends of the beam body 6 are symmetrically arranged with respect to the center of the beam body, that is, the included angles between the two beam end plates 2 and the axis of the beam body 6 are the same.

[0033] The beam body 6 adopts a reinforced concrete structure, and it has a steel reinforcement cage inside and is formed by pouring concrete.

[0034] The beam end plate 2 is provided with a sleeve 1 for connecting the end face of the beam body. The sleeve 1 is coaxially arranged with the beam body 6, that is, the axis of the sleeve 1 forms a set acute angle with the beam end plate 2. The sleeve 1 is buried in the concrete inside the beam body 6, realizing the fixation of the beam end plate 2 and the beam body 6.

[0035] In this embodiment, the sleeve 1 is formed by welding four side steel plates.

[0036] The steel reinforcement cage includes a plurality of longitudinal steel bars 4. The longitudinal steel bars are arranged along the length direction of the beam body. Stirrups are tied between the plurality of longitudinal steel bars. The outer contour shape of the sleeve 1 matches the distribution position of the longitudinal steel bars 4. The ends of the longitudinal steel bars are welded and fixed on the outer side face of the sleeve, and a weld 5 is formed between the longitudinal steel bars and the sleeve.

[0037] In order to meet the welding length requirement between the longitudinal steel bars 4 and the sleeve 1, the minimum dimension of the sleeve 1 along its axis direction is greater than 5 times the diameter of the longitudinal steel bars 4.

[0038] Adopting this setting method, compared with the traditional connection method of using grouting sleeves for longitudinal steel bars in concrete beams and concrete columns, it avoids the phenomenon of non-dense grouting, ensures the integrity of the node structure, and also avoids wet operations such as grouting, accelerating the construction progress.

[0039] Embodiment 2

[0040] This embodiment provides an assembled beam-column joint structure, as Figures 4 - 5 shown, including node components, precast columns, and the precast beam described in Embodiment 1.

[0041] The precast column 13 includes a column body, column end plates are provided at both ends of the column body, and the column body can be fixed to the joint component through the column end plates.

[0042] In this embodiment, the precast column has the same structure as the precast beam, and the only difference is that the column end plate of the precast column is arranged perpendicular to the axis of the column body.

[0043] Second fixing holes are provided on the column end plates, and the column end plates can be fixed to the joint component through the second fixing holes and threaded fixing members.

[0044] The joint component includes a joint body, and the joint body includes a column connecting member 11, a first beam connecting member 12 and a second beam connecting member. The column connecting member 11, the first beam connecting member 12 and the second beam connecting member are all made of square steel, and the column connecting member 11, the first beam connecting member 12 and the second beam connecting member are perpendicularly and orthogonally welded and fixed to each other.

[0045] The axis of the column connecting member 11 is arranged vertically, the axes of the two beam connecting members are arranged horizontally, column fixing plates 7 are welded and fixed to the top end and the bottom end of the column connecting member 11 respectively, fourth fixing holes 8 matching the second fixing holes on the column end plates are provided on the column fixing plates 7, the column fixing plates 7 are perpendicular to the axis of the column connecting member 11, and the column fixing plates 7 are fixed to the column end plates through the fourth fixing holes 8 and threaded fixing members.

[0046] Beam fixing plates 9 are provided at both ends of the first beam connecting member 12 and the second beam connecting member. The beam fixing plates 9 match the beam end plates 2, and are arranged at a set acute angle with respect to the axes of the beam connecting members and the precast beams.

[0047] Third fixing holes 10 matching the first fixing holes 3 are provided on the beam fixing plates 9, and the beam fixing plates 9 are fixed to the beam end plates 2 through the third fixing holes 10, the first fixing holes 3 and threaded fixing members.

[0048] In this embodiment, the threaded fixing members adopt bolts and nuts 14. Taking the fixing method of the beam fixing plates 9 and the beam end plates 2 as an example for illustration:

[0049] After the bolts pass through the third fixing holes 10 and the first fixing holes 3, the nuts 14 are tightened, so as to realize the fixing of the beam fixing plates 9 and the beam end plates 2. Similarly, after the bolts pass through the second fixing holes and the fourth fixing holes 8 and the nuts 14 are tightened, the fixing of the column fixing plates 7 and the column end plates can be realized.

[0050] The construction method of the joint structure in this embodiment is as follows:

[0051] The precast beams and precast columns are prefabricated. Taking the beam end plates as an example for illustration: Specifically, the beam end plates 2 and the sleeves 1 are processed, and the sleeves 1 are welded on the surfaces of the beam end plates 2, wherein the axes of the sleeves 1 form a set acute angle with the beam end plates 2;

[0052] Weld the end of the longitudinal steel bar 4 of the beam body 6 to the outer side surface of the sleeve 1, and then tie the stirrups of the beam body 6;

[0053] After setting up the formwork, pour concrete to complete the prefabrication of the precast beam.

[0054] The manufacturing method of the precast column is only different from that of the precast beam in that the sleeve 1 is welded to the column end plate in a state where the axis is perpendicular to the column end plate, and the other method steps are the same, so they will not be repeated here.

[0055] Process the joint components, weld and fix the column connecting piece, the first beam connecting piece and the second beam connecting piece, weld and fix the column fixing plate 7 and the beam fixing plate 9. If it is at the border position, one end of the first beam connecting piece 12 or the second beam connecting piece does not weld the beam fixing plate 9, and the end that does not weld the beam fixing plate is flush with the outer side surface of the column connecting piece. If it is at the corner position, one end of both the first beam connecting piece 12 and the second beam connecting piece does not weld the beam fixing plate 9, and this end is flush with the outer side surface of the column connecting piece. Among them, the beam fixing plate 9 forms a set acute angle of 70° - 80° with the axes of the first beam connecting piece 12 and the second beam connecting piece.

[0056] Transport the fabricated precast beam, precast column and joint components to the construction site.

[0057] After using a crane to hoist and lift the joint components, hoist them to align the column fixing plate 8 with the column end plate of the lower - layer precast column, and slowly lower them to accurately align the column fixing plate 8 and the column end plate. After completing the position correction of the joint components, fix the column fixing plate 8 at the bottom end of the column connecting piece 11 and the column end plate above the lower - layer precast column with bolts and nuts 14.

[0058] After the installation of adjacent joint components is completed, hoist a precast beam between adjacent joints with a crane, and slowly place the precast beam at the position between two relatively arranged beam fixing plates 9 in adjacent joint components. When the beam end plate 2 and the beam fixing plate 9 are aligned, fix the beam end plate 2 and the beam fixing plate 9 with bolts and nuts 14.

[0059] Use the same method to complete the installation of the precast columns, precast beams and joint components of the whole floor. After the installation is completed, carry out the installation of the precast columns, precast beams and joint components of the next floor.

[0060] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A precast beam, characterized in that, It includes a beam body. Beam end plates are provided at both ends of the beam body. The beam end plates are provided with a plurality of first fixing holes. The beam end plates are arranged at a set acute angle with the axis of the beam body. The distance between the tops of the beam end plates at both ends of the beam body is greater than the distance between the bottoms, so that the planes where the two beam end plates are located can intersect to form a V-shaped structure. The included angles between the beam end plates at both ends of the beam body and the axis of the beam body are equal. The set acute angle is 70° - 80°. The beam body adopts a reinforced concrete structure and has a steel reinforcement cage inside. A sleeve is provided on the end face where the beam end plate is connected to the beam body. The sleeve is buried inside the beam body. The end of the longitudinal reinforcement in the steel reinforcement cage inside the beam body is fixed to the outer side face of the sleeve. The sleeve is formed by welding four side steel plates. The steel reinforcement cage includes a plurality of longitudinal reinforcements. The longitudinal reinforcements are arranged along the length direction of the beam body. Stirrups are tied between the plurality of longitudinal reinforcements. The outer contour shape of the sleeve matches the distribution position of the longitudinal reinforcements, and a weld seam is formed between the longitudinal reinforcements and the sleeve.

2. An assembled beam-column joint structure, characterized in that, It includes a joint component, a precast column, and the precast beam according to any one of claims 1. The joint component includes a joint body. The top and / or bottom of the joint body is connected to the precast column through column fixing plates. A beam fixing plate matching the beam end plate is provided on the side of the joint body. The beam fixing plate is at a set acute angle with the axis of the precast beam. The beam fixing plate is fixed to the beam end plate to realize the fixation of the precast beam and the joint component.

3. The prefabricated beam-column joint structure according to claim 2, characterized in that, The end of the precast column is provided with a column end plate. The column end plate is provided with second fixing holes. The column end plate is fixed to the column fixing plate through the second fixing holes and threaded fasteners to realize the fixation of the precast column and the joint component.

4. The prefabricated beam-column joint structure according to claim 2, wherein The column end plate is arranged perpendicular to the axis of the precast column.

5. The prefabricated beam-column joint structure according to claim 2, characterized in that, The precast column includes a column body. The end of the column body is provided with a column end plate. The column body adopts a reinforced concrete structure and has a steel reinforcement cage inside. A sleeve buried in the column body is provided on the end face where the column end plate is connected to the column body. The longitudinal reinforcement in the steel reinforcement cage inside the column body is fixed to the outer side face of the sleeve.

6. The prefabricated beam-column joint structure according to claim 2, characterized in that, The joint body includes a column connecting member, a first beam connecting member, and a second beam connecting member. The column connecting member, the first beam connecting member, and the second beam connecting member are perpendicularly and orthogonally fixed to each other. Column fixing plates are provided at both ends of the column connecting member. Beam fixing plates are provided at both ends of the first beam connecting member and the second beam connecting member.

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