CN108951886B - Prefabricated assembled concrete anti-seismic node - Google Patents
Prefabricated assembled concrete anti-seismic node Download PDFInfo
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- CN108951886B CN108951886B CN201811176715.7A CN201811176715A CN108951886B CN 108951886 B CN108951886 B CN 108951886B CN 201811176715 A CN201811176715 A CN 201811176715A CN 108951886 B CN108951886 B CN 108951886B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
- E04B1/21—Connections specially adapted therefor
- E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention discloses a prefabricated assembled concrete anti-seismic node which comprises a prefabricated concrete column, a prefabricated concrete beam, an upper connecting steel plate, a lower connecting steel plate, transverse bolts, a vertical steel base plate, vertical bolts and steel cross shear resistant pieces, wherein the transverse bolts and the vertical bolts are bolts with prestress, the prefabricated concrete column is provided with bracket, two rectangular grooves are formed in one end, far away from the concrete beam, of the concrete column and are matched with the vertical steel base plate, transverse bolt holes I transversely penetrate the concrete column are formed in the rectangular grooves, the section of the prefabricated concrete beam is T-shaped, transverse bolt holes II matched with the transverse bolt holes I are reserved at the end heads of the concrete beam, and vertical bolt holes I are vertically formed in the positions, close to the end heads, of the concrete beam. The prefabricated concrete anti-seismic node is simple to assemble, convenient and quick, and good in anti-seismic effect.
Description
Technical Field
The invention relates to a building connection node, in particular to a prefabricated assembly type concrete earthquake-resistant node.
Background
In the past decades, the research on the structure in China is mainly reflected in the research on the structural integrity and the research on the anti-seismic performance of the components, and the theoretical defects exist in the aspect of nodes. Node research is gaining attention from researchers of vast scholars in the early 80 s of the last century. The scholars at home and abroad have a series of researches. However, as far as the current research, especially domestic research is concerned, the main problems and limitations are as follows: firstly, most designs cannot be completely separated from cast-in-situ, and the conditions of on-site welding still exist due to the adoption of dry-wet combination, so that the high-efficiency and the high-speed can not be realized; secondly, the node design is too complicated, accessories are complicated, and disassembly and replacement are not easy. Meanwhile, in the existing building market, most consumers are not relieved enough about the earthquake resistance of the assembled building, and the earthquake resistance of the nodes is considered to be questionable, and although the assembled building is still greatly popularized in China at present, the earthquake resistance of the structural nodes still is a problem which needs to be solved urgently at present for the real development of the assembled building.
Disclosure of Invention
The invention aims to provide a prefabricated concrete earthquake-resistant node which is simple, convenient and quick to assemble and good in earthquake-resistant effect.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides a prefabricated assembled concrete antidetonation node, including prefabricated concrete column, prefabricated concrete beam, upper portion connecting steel sheet, lower part connecting steel sheet, transverse bolt, vertical steel backing plate, vertical bolt, prefabricated concrete column has the bracket, be equipped with two rectangle recesses on the one end that the concrete column kept away from the concrete beam, rectangle recess and vertical steel backing plate looks adaptation, be equipped with horizontal bolt hole one in the rectangle recess respectively and transversely run through the concrete column, the precast concrete beam cross-section is T type, the end department of concrete beam leaves the horizontal bolt hole second with horizontal bolt hole one looks adaptation, the concrete beam is close to end department and vertically is equipped with vertical bolt hole one, the lower part connecting steel sheet is L type, be equipped with horizontal bolt hole three on the riser of lower part connecting steel sheet, be equipped with vertical bolt hole two on the riser of lower part connecting steel sheet, the lower part connecting steel sheet is installed in bracket upper end and its riser is close to the concrete column, the shape after the shape of upper portion connecting steel sheet and "T" anticlockwise rotation 90, the upper part connecting steel sheet is equipped with four bolt holes on the upper portion connecting steel sheet, the horizontal bolt hole three on the upper side connecting steel sheet is equipped with the vertical bolt hole three on the upper side connecting steel sheet, the vertical steel column, the vertical bolt hole is installed in proper order, the horizontal bolt hole is perpendicular to the vertical bolt hole one end is installed to the vertical bolt hole three on the upper side connecting steel sheet, the upper end of the vertical steel sheet is perpendicular connecting steel sheet and the vertical bolt hole one end is perpendicular to the vertical bolt hole one side, the vertical bolt hole is connected to the vertical bolt hole one side, and is perpendicular to the vertical bolt hole one side and the vertical bolt hole on the upper end is perpendicular to the vertical bolt plate, the vertical bolts sequentially penetrate through the third vertical bolt holes, the first vertical bolt holes and the second vertical bolt holes to fasten the concrete beam with the upper connecting steel plate and the lower connecting steel plate.
Preferably, the transverse bolts and the vertical bolts are bolts with prestress applied.
Preferably, two triangular stiffening ribs are welded at the upper ends of the transverse plates of the upper connecting steel plates.
Preferably, the cross-shaped concrete beam comprises a bracket, and is characterized by further comprising a steel cross-shaped shearing part, wherein a first cross-shaped hole is reserved on the bracket, a second cross-shaped hole is vertically penetrated at the end head of the concrete beam, a third cross-shaped hole is arranged on a transverse plate of the lower connecting steel plate, a fourth cross-shaped hole is arranged on a transverse plate of the upper connecting steel plate, and the steel cross-shaped shearing part enters the first cross-shaped hole through the fourth cross-shaped hole, the second cross-shaped hole and the third cross-shaped hole.
Preferably, the steel cross shear member is composed of two mutually perpendicular plates, one of which is longer than the other.
Preferably, the number of the transverse bolt holes I, the transverse bolt holes II and the transverse bolt holes is eight, the number of the transverse bolt holes III and the transverse bolt holes IV is four, and the number of the vertical bolt holes I, the vertical bolt holes II, the vertical bolt holes III and the vertical bolt holes III is three.
Preferably, eight steel bars are welded on the vertical plate of the upper connecting steel plate, four steel bars are welded on the vertical plate and the transverse plate of the lower connecting steel plate respectively, and mounting holes matched with the steel bars are reserved on the concrete column.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention adopts three different connection modes to form triple protection, and forms a node form with excellent earthquake resistance. Firstly, connecting a precast concrete beam with a concrete column by adopting 8 transverse bolts and 4 vertical steel backing plates, so that the precast concrete beam is well stressed; secondly, the cross shear-resistant member is inserted into the joint of the beams and the columns, and the steel plate of the lower connecting member further fixes the cross shear-resistant member, so that the shear resistance of the node is ensured; and finally, performing anchoring connection with the prefabricated concrete column through the upper connecting steel plate and the lower connecting steel plate, and then connecting with the prefabricated concrete beam through the vertical bolts, so as to further strengthen the strength of the node. Because through experiments, node damage generally occurs at the joint of the beams and the columns, more specifically at the beam end part of the overhanging end, the tensile capacity of the concrete is further enhanced by adding steel plates at the upper part and the lower part of the precast concrete beam, and the nodes are reinforced;
(2) The method has the advantages of higher precision of the prefabrication process, extremely low field requirement, no requirement on workers basically, convenience and rapidness in installation and suitability for standardized production;
(3) The node has high strength, triple connection protection, is suitable for areas with high earthquake resistance requirements, and has good earthquake resistance;
(4) The invention basically adopts the full-dry connection of assembly and bolt connection, except the hole filling concrete when the cross shear-resistant piece is inserted, the full-dry connection mode is basically realized, the defect of site cast-in-situ is avoided, the site welding process which is easy to cause defects is not existed, the high-efficiency and high-quality connection of the nodes is realized, the construction period is saved, and the cost is reduced;
(5) The connecting node is convenient to apply, facilitates the installation work of beam column connection, most of work is completed in factories, and the connecting node is convenient and quick only by simple assembly on site, has low requirements on technical workers and really realizes component assembly.
Drawings
FIG. 1 is a schematic view of a prefabricated concrete earthquake-resistant joint according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of a precast concrete column in an embodiment of the present invention;
fig. 3 is a schematic structural view of a precast concrete beam according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of a lower connecting steel plate according to an embodiment of the present invention;
fig. 5 is a schematic view showing the structure of an upper connecting steel plate in the embodiment of the present invention;
FIG. 6 is a schematic view of a steel cross shear member in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of the structure of a vertical steel backing plate in an embodiment of the invention;
in the figure, 1, concrete column, 2, concrete beam, 3, upper connecting steel plate, 4, lower connecting steel plate, 5, transverse bolt, 6, vertical steel backing plate, 7, vertical bolt, 8, steel cross shear, 9, bracket, 10, rectangular groove, 11, transverse bolt hole I, 12, transverse bolt hole II, 13, vertical bolt hole I, 14, transverse bolt hole III, 15, vertical bolt hole II, 16, triangular stiffening rib, 17, transverse bolt hole IV, 18, vertical bolt hole III, 19, steel bar, 20, mounting hole, 21, cross hole I, 22, cross hole II, 23, cross hole III, 24, cross hole IV.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, a prefabricated assembled concrete earthquake-resistant joint comprises a prefabricated concrete column 1, a prefabricated concrete beam 2, an upper connecting steel plate 3, a lower connecting steel plate 4, a transverse bolt 5, a vertical steel backing plate 6, a vertical bolt 7 and a steel cross shear member 8, wherein the transverse bolt 5 and the vertical bolt 7 are bolts with prestress applied, the prefabricated concrete column 1 is provided with a bracket 9, one end, far away from the concrete beam 2, of the concrete column 1 is provided with two rectangular grooves 10, the rectangular grooves 10 are matched with the vertical steel backing plate 6, transverse bolt holes 11 are respectively arranged in the rectangular grooves 10 and transversely penetrate through the concrete column 1, the section of the prefabricated concrete beam 2 is of a T shape, a transverse bolt hole second 12 matched with the transverse bolt hole first 11 is reserved at the end of the concrete beam 2, and a vertical bolt hole first 13 is vertically arranged at the position, close to the end, of the concrete beam 2.
The lower connecting steel plate 4 is L-shaped, a transverse bolt hole III 14 is formed in a vertical plate of the lower connecting steel plate 4, a vertical bolt hole II 15 is formed in a transverse plate of the lower connecting steel plate 4, and the lower connecting steel plate 4 is arranged at the upper end of the bracket 9 and is abutted against the concrete column 1.
The shape of the upper connecting steel plate 3 is the same as the shape of the upper connecting steel plate 3 after the T is rotated 90 degrees anticlockwise, two triangular stiffening ribs 16 are welded at the upper end of the transverse plate of the upper connecting steel plate 3, four transverse bolt holes 17 are formed in the vertical plate of the upper connecting steel plate 3, three vertical bolt holes 18 are formed in the transverse plate of the upper connecting steel plate 3, and the vertical plate of the upper connecting steel plate 3 is arranged at the upper end of the vertical plate of the lower connecting steel plate 4.
Eight steel bars 19 are welded on the vertical plate of the upper connecting steel plate 3, four steel bars 19 are welded on the vertical plate and the transverse plate of the lower connecting steel plate 4 respectively, the steel bars are two-stage steel bars, and mounting holes 20 matched with the steel bars 19 are reserved on the concrete column 1.
The concrete beam 2 is installed between the upper portion connecting steel plate 3 and the lower portion connecting steel plate 4, the vertical steel backing plate 6 is installed in the rectangular groove 10 respectively and one end of the concrete beam 2 end far away from the rectangular groove 10, and the vertical steel backing plate 6 is used for penetrating the transverse bolts 5 and preventing the bolt hole from being stressed greatly when being stressed. The transverse bolts 5 sequentially penetrate through the vertical steel backing plate 6, the first transverse bolt hole 11, the third transverse bolt hole 14 or the fourth transverse bolt hole 17, the second transverse bolt hole 12 and the vertical steel backing plate 6 on the concrete beam 2 on the concrete column 1 to fixedly connect the concrete column 1 with the concrete beam 2, and the vertical bolts 7 sequentially penetrate through the third vertical bolt hole 18, the first vertical bolt hole 13 and the second vertical bolt hole 15 to tightly fasten the concrete beam 2 with the upper connecting steel plate 3 and the lower connecting steel plate 4.
The steel cross shear member 8 consists of two mutually perpendicular plates, wherein one plate is longer than the other plate, a cross hole I21 is reserved on the bracket 9, a cross hole II 22 vertically penetrates through the end head of the concrete beam 2, a cross hole III 23 is arranged on the transverse plate of the lower connecting steel plate 4, a cross hole IV 24 is arranged on the transverse plate of the upper connecting steel plate 3, the cross hole IV 24 is arranged between two triangular stiffening ribs 16, and the steel cross shear member 8 enters the cross hole I21 through the cross hole IV 24, the cross hole II 22 and the cross hole III 24.
The first transverse bolt hole 11, the second transverse bolt hole 12 and the transverse bolt 5 are respectively eight, the third transverse bolt hole 14 and the fourth transverse bolt hole 17 are respectively four, and the first vertical bolt hole 13, the second vertical bolt hole 15, the third vertical bolt hole 18 and the third vertical bolt hole 7 are respectively three.
The specific operation is as follows: firstly, a concrete column 1, a concrete beam 2, an upper connecting steel plate 3, a lower connecting steel plate 4 and a steel cross shear-resistant member 8 are prefabricated in a factory, a rectangular groove 10, a transverse bolt hole 11, a cross hole 21 and a mounting hole 20 are reserved in the concrete column 1, steel bars 19 are welded on the lower connecting steel plate 4 and the upper connecting steel plate 3 respectively, then the steel bars 19 of the lower connecting steel plate 4 and the upper connecting steel plate 3 are inserted into the corresponding mounting holes 20 to be anchored with the concrete column 1 respectively, and the distance between the transverse plates of the upper connecting steel plate 3 and the transverse plates of the lower connecting steel plate 4 is identical to the height of the end section of the precast concrete beam 2, so that the concrete beam 2 can be conveniently inserted in the later stage. A second transverse bolt hole 12, a first vertical bolt hole 13 and a second cross-shaped hole 22 are reserved on the concrete beam 2.
The components are transported to a construction site, the concrete beam 2 is pushed between the upper connecting steel plate 3 and the lower connecting steel plate 4 by a crane, and the traditional grouting process at the joint is not adopted; firstly, respectively installing a vertical steel backing plate 6 on a concrete column 1 and a concrete beam 2, inserting 8 long transverse bolts 5 into the joint of the beam and the column through the vertical steel backing plate 6, twisting the steel plate area, applying a pretightening force to ensure that the beam and the column are connected preliminarily, tensioning and fixing the transverse bolts 6, overcoming pulling force when vertical vibration occurs, reducing amplitude and consuming earthquake energy, and forming a first anti-seismic defense line; then the steel cross shear member 8 is inserted into the cross hole I21 from the cross hole IV 24, the cross hole II 22 and the cross hole III 24, and enters the bottom of the hole of the column bracket 9, and then concrete with one level higher than the original concrete strength or high-strength mortar is poured into the column bracket to naturally maintain the column bracket, so that the shear resistance of the beam column node is improved, the steel cross shear member 8 can bear the horizontal shear force of the bottom of the foot of the concrete column 1, the effect of limiting the node to swing up and down is achieved, and a second procedure of the beam column node is formed; finally, the upper connecting steel plate 3 and the lower connecting steel plate 4 are tightly connected with the concrete beam 2 by utilizing the vertical bolts 7, and as the tensile property of the concrete beam 2 is not very strong, particularly the joint position at the joint of the beam and the column is often easy to crack, the tensile property of the concrete beam is greatly improved after the concrete beam is connected with the connecting steel plate, the steel plate with stiffening ribs moves downwards, the transverse bolts stretch, the transverse bolts, the steel cross shear resistant piece and the steel plate move upwards to provide tensile force, the anti-seismic property of the joint is greatly improved, and a third defense line for reinforcing the anti-seismic property of the joint is formed.
In the embodiment, the strength of the node is very high, the node has good shock resistance, the basic operation on site is to install bolts and steel cross shear resistant pieces, the basic technology has no requirement, and the node is suitable for areas with high shock resistance requirements and has good shock resistance. Secondly, most of precise work is completed in a factory, and the high degree of factory mechanization further ensures the anti-seismic performance of the node, meanwhile, the site operation is very simple, the requirements on workers are very low, the installation is convenient and quick, and the method is suitable for standardized production; the invention basically adopts the full-dry type connection of splicing and bolting by the connecting nodes, and basically realizes the full-dry type connection mode except filling concrete into holes when the cross shearing-resistant pieces are inserted, thereby overcoming the defect of field cast-in-place, avoiding the field welding process which is easy to cause defects, realizing the high-efficiency and high-quality connection of the nodes, saving the construction period and reducing the cost.
The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention, as it is intended to provide those skilled in the art with various modifications, additions and substitutions to the specific embodiments disclosed and those skilled in the art without departing from the scope of the invention as disclosed in the accompanying claims.
Claims (5)
1. A prefabricated assembled concrete antidetonation node, its characterized in that: including precast concrete post, precast concrete beam, upper portion connecting steel plate, lower part connecting steel plate, transverse bolt, vertical steel backing plate, vertical bolt in proper order, the precast concrete post has the bracket, be equipped with two rectangle recesses on the one end that the concrete post kept away from the concrete beam, rectangle recess and vertical steel backing plate looks adaptation, be equipped with transverse bolt hole one transverse through concrete post in the rectangle recess respectively, the precast concrete beam cross-section is the T type, the end department of concrete beam leaves with transverse bolt hole one looks adaptation transverse bolt hole two, the concrete beam is close to the vertical bolt hole that is equipped with in end department, the lower part connecting steel plate is L-shaped, be equipped with transverse bolt hole three on the riser of lower part connecting steel plate, be equipped with vertical bolt hole two on the diaphragm of lower part connecting steel plate, the lower part connecting steel plate is installed in bracket upper end and its riser is close to with the concrete post, the shape after the shape of upper part connecting steel plate and "T" anticlockwise rotation 90 °, be equipped with transverse bolt hole four on the riser of upper part connecting steel plate, the vertical bolt hole connecting steel plate is equipped with three on the end connecting steel plate, the vertical bolt hole three on the upper end connecting steel plate is equipped with vertical bolt hole three, the vertical bolt hole three on the vertical bolt hole connecting steel plate is installed in proper order, the vertical bolt hole three on the vertical bolt hole connecting steel plate is perpendicular connecting steel plate three, the vertical bolt hole is perpendicular connecting steel plate is perpendicular to the vertical bolt hole three on the vertical bolt connecting steel plate is perpendicular connecting steel plate, the concrete beam is fastened with the upper connecting steel plate and the lower connecting steel plate through the first vertical bolt hole and the second vertical bolt hole;
the steel cross shear member is provided with a cross hole I, a cross hole II vertically penetrates through the end head of the concrete beam, a cross hole III is formed in a cross plate of the lower connecting steel plate, a cross hole IV is formed in a cross plate of the upper connecting steel plate, and the steel cross shear member enters the cross hole I through the cross hole IV, the cross hole II and the cross hole III;
the transverse bolts and the vertical bolts are bolts with prestress applied.
2. A prefabricated concrete earthquake-resistant node according to claim 1, wherein: two triangular stiffening ribs are welded at the upper end of the transverse plate of the upper connecting steel plate.
3. A prefabricated concrete earthquake-resistant node according to claim 1, wherein: the steel cross shear member is composed of two mutually perpendicular plates, one of which is longer than the other.
4. A prefabricated concrete earthquake-resistant node according to claim 1, wherein: the first transverse bolt hole, the second transverse bolt hole and the transverse bolt are respectively eight, the third transverse bolt hole and the fourth transverse bolt hole are respectively four, and the first vertical bolt hole, the second vertical bolt hole, the third vertical bolt hole and the third vertical bolt are respectively three.
5. A prefabricated concrete earthquake-resistant node according to claim 1, wherein: eight steel bars are welded on the vertical plate of the upper connecting steel plate, four steel bars are welded on the vertical plate and the transverse plate of the lower connecting steel plate respectively, and mounting holes matched with the steel bars are reserved on the concrete column.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811176715.7A CN108951886B (en) | 2018-10-10 | 2018-10-10 | Prefabricated assembled concrete anti-seismic node |
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| CN201811176715.7A CN108951886B (en) | 2018-10-10 | 2018-10-10 | Prefabricated assembled concrete anti-seismic node |
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| CN108951886A CN108951886A (en) | 2018-12-07 |
| CN108951886B true CN108951886B (en) | 2023-08-18 |
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