Fabricated reinforced concrete column provided with energy consumption connecting pieces

Abstract

The assembly type reinforced concrete column comprises the steel connecting piece, an upper column body and a lower column body, the steel connecting piece comprises an upper end plate, a lower end plate and a plurality of steel columns, the steel columns are arranged in a matrix mode, the upper end plate and the lower end plate are connected to the two ends of the steel columns respectively, and the upper end plate and the lower end plate are connected to the upper column body and the lower column body respectively. The upper column body and the lower column body are both of a concrete structure and comprise longitudinal bars, stirrups used for fixing the longitudinal bars and concrete, the upper column body is connected to the top of the upper end plate, and the lower column body is connected to the bottom of the lower end plate. According to the fabricated reinforced concrete column, concrete in a potential plastic hinge area of an existing fabricated reinforced concrete column is replaced with steel to dissipate most of energy when extreme conditions such as typhoon and earthquake occur, the deformability of the fabricated reinforced concrete column can be improved, and the fabricated reinforced concrete column has excellent bearing capacity and anti-seismic performance.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to an assembled reinforced concrete column provided with energy-dissipating connecting pieces. Background Art

[0002] Prefabricated structures have been widely studied and applied today due to their high construction efficiency, reliable quality, low carbon and environmental protection. Prefabricated reinforced concrete columns are important load-bearing and lateral force-resisting components of prefabricated reinforced concrete frame structures. Their bearing and deformation capacity in environments such as earthquakes and typhoons are highly valued. For frame columns of high-rise buildings, their plastic deformation and energy dissipation in environments such as earthquakes and typhoons are mainly concentrated in the bottom area of ​​the column. This also leads to the fact that when the concrete at the bottom of the frame column cracks and collapses under horizontal loads and cannot continue to bear the load, the steel bars often have not reached their ultimate strength, resulting in their performance not being fully utilized.

[0003] In view of this, the applicant filed this application after studying the existing technology. Utility Model Content

[0004] The utility model discloses an assembled reinforced concrete column with energy-absorbing connectors, aiming to provide an assembled reinforced concrete column structure with strong deformation and energy-absorbing capabilities and capable of fully exerting structural performance, so as to improve the problem that the structural performance of assembled reinforced concrete frame columns cannot be fully exerted in extreme environments such as earthquakes and typhoons.

[0005] The utility model provides an assembled reinforced concrete column with energy-absorbing connecting parts, comprising a steel connecting part, an upper column body and a lower column body, wherein the steel connecting part comprises an upper end plate, a lower end plate and a plurality of steel columns, wherein the plurality of steel columns are arranged in a matrix, wherein the upper end plate and the lower end plate are respectively connected to the two ends of the plurality of steel columns, wherein the upper column body and the lower column body are both concrete structures, and both comprise longitudinal reinforcement, stirrups for fixing the longitudinal reinforcement and concrete, wherein the upper column body is connected to the top of the upper end plate, and the lower column body is connected to the bottom of the lower end plate.

[0006] As a further optimization, the upper end plate is provided with a plurality of first bolt holes, the lower end plate is provided with a plurality of second bolt holes, the longitudinal reinforcement extends out of the concrete toward one end of the steel connecting piece, and an external thread is opened at the extended end, the extended end of the longitudinal reinforcement of the upper column passes through the first bolt hole, the extended end of the longitudinal reinforcement of the lower column passes through the second bolt hole, and they are respectively fixed by nuts.

[0007] As a further optimization, a gasket is provided between the nut and the upper end plate or the lower end plate.

[0008] As a further optimization, the cross-section of the steel column is square, and a total of 16 steel columns are arranged in four rows and four columns at equal intervals between the upper end plate and the lower end plate.

[0009] As a further optimization, the several steel columns are made of Q235 steel, and their total cross-sectional area does not exceed 30% of the cross-sectional area of ​​the upper column.

[0010] As a further optimization, the length of the longitudinal reinforcement extending from one end of the concrete is 100-150 mm.

[0011] As a further optimization, the cross-sections of the upper cylinder and the lower cylinder are squares with the same side lengths.

[0012] As a further optimization, the upper end plate and the lower end plate are square steel plates with a side length the same as the side length of the cross section of the upper column, and the thickness of the square steel plates is 50-80 mm.

[0013] As a further optimization, the height of the steel connecting piece is 0.8-1.5 times the side length of the cross section of the upper cylinder.

[0014] As a further optimization, the surfaces of the steel connectors are coated with fire retardant paint.

[0015] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0016] The prefabricated reinforced concrete column provided with energy-absorbing connectors of the present application is connected to the upper column and the lower column through a steel connector, forming a prefabricated reinforced concrete column with a steel connector in the bottom area of ​​the upper column, thereby replacing the concrete in the potential plastic hinge area of ​​the existing prefabricated reinforced concrete column with steel. Steel has ductility and energy absorption capacity far superior to concrete. Therefore, most of the energy in extreme situations such as typhoons and earthquakes can be dissipated through the steel connector made of pure steel in the bottom area of ​​the upper column, thereby improving the deformation capacity of the prefabricated reinforced concrete column and making it have excellent bearing capacity and seismic resistance. At the same time, the prefabricated reinforced concrete column of the present application adopts dry connection, which can effectively improve construction efficiency and ensure construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1It is a scene application diagram of a prefabricated reinforced concrete column with energy-absorbing connectors;

[0019] Figure 2 It is a structural schematic diagram of a prefabricated reinforced concrete column provided with energy-absorbing connectors in the front view direction;

[0020] Figure 3 It is a schematic diagram of the structure of the steel connector of the assembled reinforced concrete column provided with the energy dissipation connector;

[0021] Figure 4 is a schematic diagram of a cross-section of a steel connector of a prefabricated reinforced concrete column provided with an energy dissipation connector in a top view;

[0022] Icons: 1-steel connector; 11-upper end plate; 12-lower end plate; 13-steel column; 14-first bolt hole; 15-second bolt hole; 2-upper column; 21-first longitudinal reinforcement; 3-lower column; 31-second longitudinal reinforcement; 4-nut; 5-gasket; 6-stirrup; 7-concrete. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0024] Example

[0025] Combination Figures 1 to 4, this embodiment provides an assembled reinforced concrete column with an energy-absorbing connector, including a steel connector 1, an upper column 2, and a lower column 3. The steel connector 1 is arranged between the upper column 2 and the lower column 3, wherein the cross-sections of the upper column 2 and the lower column 3 are squares with the same side lengths. The steel connector 1 is a pure steel structure, including an upper end plate 11, a lower end plate 12, and a steel column 13. The upper end plate 11 and the lower end plate 12 are two square steel plates of the same size, whose side lengths are the same as the cross-section side lengths of the upper column 2 or the lower column 3, and the thickness is 50-80mm; a plurality of first bolt holes 14 are provided on the upper end plate 11, and a plurality of second bolt holes 15 are provided on the lower end plate 12. The cross-section of the steel column 13 is square, and a total of 16 are arranged in four rows and four columns with equal spacing between the upper end plate 11 and the lower end plate 12, and the two ends of the steel column 13 are connected to the upper end plate 11 and the lower end plate 12.

[0026] The upper column 2 and the lower column 3 are reinforced concrete column structures, both of which include longitudinal bars, stirrups 6 and concrete 7. For the convenience of explanation, the longitudinal bars of the upper column 2 are denoted as first longitudinal bars 21, and the longitudinal bars of the lower column 3 are denoted as second longitudinal bars 31. The upper column 2 is arranged above the steel connector 1, and the lower end of the first longitudinal bar 21 protrudes from the lower surface of the concrete 7, with a protruding length of 100-150mm, and an external thread is tapped on this protruding section so that the protruding section can pass through the first bolt hole 14 and is connected to the upper end plate 11 through the cooperation of the gasket 5 and the nut 4.

[0027] The lower column 3 is arranged below the steel connector 1, and the upper end of the second longitudinal reinforcement 31 extends out of the upper surface of the concrete 7 with a length of 100-150 mm. An external thread is tapped on this extended section so that the extended section can pass through the second bolt hole 15 and be connected to the lower end plate 12 through the cooperation of the gasket 5 and the nut 4.

[0028] Among them, the gasket 5 and the nut 4 are arranged at the lower end of the first longitudinal reinforcement 21 and the upper end of the second longitudinal reinforcement 31 to fasten the upper column 2 and the lower column 3 to the upper end plate 11 and the lower end plate 12 respectively, so as to ensure the force transmission between the first longitudinal reinforcement 21 and the steel connecting piece 1, and between the steel connecting piece 1 and the second longitudinal reinforcement 31.

[0029] The first bolt holes 14 and the second bolt holes 15 are respectively arranged on the upper end plate 11 and the lower end plate 12 , and their number and positions correspond to the first longitudinal ribs 21 and the second longitudinal ribs 31 , respectively, so that the first longitudinal ribs 21 and the second longitudinal ribs 31 can pass through.

[0030] The steel column 13 is made of Q235 steel, and the total cross-sectional area of ​​the steel column 13 does not exceed 30% of the cross-sectional area of ​​the upper column 2. Since Q235 steel has a low yield strength and good deformation capacity, it can ensure that the steel column 13 yields before the concrete 7 reaches the ultimate compressive strain when the total cross-sectional area of ​​the steel column 13 is limited. The plastic deformation of the steel column 13 dissipates most of the energy of the reinforced concrete column structure when encountering extreme conditions such as typhoons and earthquakes, thereby improving the deformation and energy dissipation capacity of the entire structure.

[0031] The steel connector 1 is located at the bottom of the upper column 2, and its height is 0.8-1.5 times the side length of the cross section of the upper column 2, which can make the reinforced concrete part avoid the most unfavorable column bottom section to reduce the adverse effect of horizontal load on the upper column 2.

[0032] The steel connector 1 is thickly coated with fire retardant paint on all surfaces except the top and bottom surfaces, so as to delay the decrease of the bearing capacity of the steel connector 1 in case of fire and improve the structural safety.

[0033] The upper column 2 and the lower column 3 are designed according to the "Code for Design of Concrete Structures (GB50010-2010)" or the "Code for Seismic Design of Buildings (GB50011-2010)".

[0034] The utility model also provides a construction method for an assembled reinforced concrete column provided with an energy-consuming connecting piece.

[0035] The steps include:

[0036] S1: In the factory prefabrication stage:

[0037] S11: manufacturing a steel connector 1, tapping the external threads at the ends of the first longitudinal reinforcement 21 and the second longitudinal reinforcement 31, and tying the first longitudinal reinforcement 21 and the stirrup 6, and tying the second longitudinal reinforcement 31 and the stirrup 6;

[0038] S12: Insert the first longitudinal reinforcement 21 into the first bolt hole 14, then install the gasket 5, tighten the nut 4 on the first longitudinal reinforcement 21, so that the upper end plate 11 becomes a side template for pouring concrete 7, then set up the templates of the upper column 2 and the lower column 3, pour concrete 7, and remove the templates after the concrete 7 reaches the requirements, completing the production of the upper column 2 and the lower column 3, and the upper column 2 and the steel connecting piece 1 form a whole.

[0039] S2: During the on-site construction phase:

[0040] S21: Install the lower column 3 and complete the construction of beams, plates and nodes;

[0041] S22: Lay a concrete cushion layer on the upper surface of the lower column 3, then hoist the upper column 2 and the steel connector 1 above the lower column 3, pass the second longitudinal reinforcement 31 through the second bolt hole 15, install the gasket 5 and tighten the nut 4, and complete the construction of the assembled reinforced concrete column with energy-absorbing connectors.

[0042] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An assembled reinforced concrete column provided with an energy dissipation connector, characterized in that: It includes a steel connecting member, an upper column and a lower column. The steel connecting member includes an upper end plate, a lower end plate and a plurality of steel columns. The plurality of steel columns are arranged in a matrix. The upper end plate and the lower end plate are respectively connected to the two ends of the plurality of steel columns. The upper column and the lower column are both concrete structures, and both include longitudinal reinforcement, stirrups for fixing the longitudinal reinforcement and concrete. The upper column is connected to the top of the upper end plate, and the lower column is connected to the bottom of the lower end plate.

2. The assembled reinforced concrete column with energy dissipation connector according to claim 1, characterized in that: The upper end plate is provided with a plurality of first bolt holes, the lower end plate is provided with a plurality of second bolt holes, the longitudinal reinforcement extends out of the concrete toward one end of the steel connecting piece, and an external thread is provided at the extended end, the extended end of the longitudinal reinforcement of the upper column passes through the first bolt hole, the extended end of the longitudinal reinforcement of the lower column passes through the second bolt hole, and they are respectively fixed by nuts.

3. The assembled reinforced concrete column with energy dissipation connector according to claim 2 is characterized in that , a gasket is provided between the nut and the upper end plate or the lower end plate.

4. The assembled reinforced concrete column with energy dissipation connector according to claim 1 is characterized in that The cross section of the steel column is square, and there are 16 of them arranged in four rows and four columns with equal spacing.

5. The assembled reinforced concrete column with energy dissipation connector according to claim 1 is characterized in that The several steel columns are made of Q235 steel, and their total cross-sectional area does not exceed 30% of the cross-sectional area of ​​the upper column.

6. The assembled reinforced concrete column with energy dissipation connector according to claim 2 is characterized in that The length of the longitudinal reinforcement extending out of one end of the concrete is 100-150mm.

7. The assembled reinforced concrete column with energy dissipation connector according to claim 1 is characterized in that , the cross-sections of the upper cylinder and the lower cylinder are squares with the same side lengths.

8. The assembled reinforced concrete column with energy dissipation connector according to claim 7 is characterized in that The upper end plate and the lower end plate are square steel plates whose side length is the same as the side length of the cross section of the upper column, and the thickness of the square steel plates is 50-80mm.

9. The assembled reinforced concrete column with energy dissipation connector according to claim 7 is characterized in that The height of the steel connecting piece is 0.8-1.5 times the side length of the cross section of the upper column.

10. The assembled reinforced concrete column with energy dissipation connector according to claim 1, characterized in that ,The surfaces of the steel connecting parts are coated with fire retardant coating.

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