CN215406527U - Frame structure additional building system with column bottom tie beam - Google Patents
Frame structure additional building system with column bottom tie beam Download PDFInfo
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- CN215406527U CN215406527U CN202121479440.1U CN202121479440U CN215406527U CN 215406527 U CN215406527 U CN 215406527U CN 202121479440 U CN202121479440 U CN 202121479440U CN 215406527 U CN215406527 U CN 215406527U
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Abstract
The utility model belongs to the technical field of novel building structures, and particularly relates to a frame structure additional building system with column bottom tie beams. The technical scheme is as follows: a frame structure additional building system with column bottom straining beams comprises existing frame columns, wherein existing frame beams are connected between adjacent existing frame columns; newly-added frame columns are arranged on the column tops of the existing frame columns, and column bottom tie beams are connected between the adjacent newly-added frame columns; and shear-resistant steel bars are arranged in the newly-added frame column, and the lower sections of the shear-resistant steel bars are linearly implanted into the existing frame column. The utility model provides a new frame column bottom fixing support, which does not transfer column bottom bending moment to a frame structure additional system of an existing structure.
Description
Technical Field
The utility model belongs to the technical field of novel building structures, and particularly relates to a frame structure additional building system with column bottom tie beams.
Background
With the progress of urbanization, more and more projects are built on the built buildings. In a conventional addition and construction mode, the column bottom of a newly added frame column is fixedly supported or hinged with an existing frame column, when the fixed support connection is adopted, the bending moment of the newly added frame column is transmitted to the original frame column and a corresponding frame beam, the internal force change of the original frame column and the frame beam is obvious, large-scale reinforcement is required to be carried out according to a rechecking result, and the cost and the progress of the whole addition and construction process are restricted by the large-scale reinforcement; when the hinged connection is adopted, the column bottom of the newly-added frame column cannot bear bending moment, the overall lateral stiffness of the newly-built structure is weaker, the displacement angle between structural layers is larger, and the requirements of structural specifications are difficult to meet when earthquake and wind loads are larger or the layer height is higher and the size of the beam column is limited.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model aims to provide a frame structure additional system which ensures that the newly-added frame column does not transmit bending moment to the existing structure on the premise of ensuring the lateral stiffness resistance of the newly-added structure.
The technical scheme adopted by the utility model is as follows:
a frame structure additional building system with column bottom straining beams comprises existing frame columns, wherein existing frame beams are connected between adjacent existing frame columns; newly-added frame columns are arranged on the column tops of the existing frame columns, and column bottom tie beams are connected between the adjacent newly-added frame columns; and shear-resistant steel bars are arranged in the newly-added frame column, and the lower sections of the shear-resistant steel bars are linearly implanted into the existing frame column.
The column bottom of the newly added frame column is only connected with the shear steel bars with the column top of the original frame column, the column bottom straining beams are arranged at the column bottom of the newly added frame column in a bidirectional mode, and the column bottom bending moment of the newly added frame column is completely born by the column bottom straining beams. At the moment, the newly added frame column does not transmit bending moment to the existing frame column, the existing frame column only bears the vertical load of the added structure, the change of the internal force is limited, the internal force of the existing frame beam is almost unchanged, and the original structure is only reinforced or not reinforced in a small range. The method greatly improves the progress of the addition process and reduces the cost of the addition process.
As the preferred scheme of the utility model, the newly added frame column is also internally provided with newly added column reinforcing steel bars, and the lower sections of the newly added column reinforcing steel bars are anchored into the column bottom straining beam after being bent, so that the newly added column reinforcing steel bars are prevented from extending into the existing frame column, and the newly added frame column is prevented from transmitting bending moment to the existing frame column.
As a preferred solution of the present invention, a layer of sliding plates is laid between the existing frame beams and the column bottom tension beams. A sliding plate is arranged between the existing frame beam and the column bottom straining beam, so that a sliding surface is formed between the column bottom straining beam and the existing frame beam, a superposed beam stress system is prevented from being formed by the column bottom straining beam and the existing frame beam, and influence on the internal force of the existing frame beam is avoided.
In a preferred embodiment of the present invention, the thickness of the sliding plate is 2 to 5 mm. The optimal thickness of the sliding plate is 3mm, and a stable sliding surface is formed between the column bottom pull beam and the existing frame beam. The sliding plate may be a galvanized steel plate.
As a preferred scheme of the utility model, the arrangement direction of the column bottom straining beam is consistent with that of the existing frame beam, so that the existing frame beam can reliably support the column bottom straining beam, and the influence of the column bottom straining beam on the internal force of the existing floor slab is avoided.
As a preferred scheme of the utility model, the horizontal projection range of the newly-added frame column does not exceed the column top edge of the existing frame column, so that the existing frame column can reliably support the newly-added frame column, and the column top stress of the existing frame column is more balanced.
As the preferable scheme of the utility model, the height of the column bottom tension beam is less than or equal to 250mm, so that the influence of the column bottom tension beam on the thickness of the building structure can be reduced.
As a preferred scheme of the utility model, a transverse steel bar is arranged in the column bottom straining beam, one end of the transverse steel bar extending out of the column bottom straining beam penetrates through the newly added frame column and is bent upwards and anchored into the newly added frame column at a position close to the opposite column bottom straining beam. And transverse steel bars in the column bottom straining beam penetrate through the newly-added frame column and are anchored into the newly-added frame column after being bent, so that the column bottom straining beam is more reliably connected with the newly-added frame column.
As a preferred scheme of the utility model, the space between the column bottom straining beams is backfilled by adopting light filler to form a backfill layer, the thickness of the backfill layer is consistent with the height of the column bottom straining beam, a conventional building surface layer is arranged above the backfill layer, and the backfill layer and the conventional building surface layer form a newly-added building structure layer. In the area where the column bottom tie beam is not arranged above the existing frame beam, the building structure layer above the existing structure plate surface needs to be removed before additional construction. After the building is built, the area where the building structural layer is removed is backfilled by adopting light fillers such as furnace slag, the thickness of the backfilled layer is consistent with the height of the column bottom tie beam, a conventional building surface layer is arranged above the backfilled layer, and the backfilled layer and the conventional building surface layer form a new building structural layer together.
As the preferable scheme of the utility model, one side of the existing frame column facing to the newly added frame column is provided with a drill hole, and the lower section of the shear steel bar is linearly implanted into the drill hole of the existing frame column. When a newly-added frame column is installed, the column top with the frame column is drilled firstly, and the lower section of the shear-resistant steel bar is conveniently implanted into the column top. The anchoring length of the shear steel bar in the newly-added frame column is determined according to the concrete standard requirement, and the planting depth of the shear steel bar in the existing frame column is determined according to the planting bar calculation.
The utility model has the beneficial effects that:
the column bottom of the newly-added frame column is only connected with shear steel bars with the column top of the original frame column, the column bottom straining beams are arranged at the column bottom of the newly-added frame column in a bidirectional mode, the column bottom of the newly-added frame column is fixedly connected with the column bottom straining beams, the column bottom of the newly-added frame column can bear bending moment, the column bottom is fixedly supported, and the lateral stiffness of the newly-added structure is high. The column bottom bending moment of the newly added frame column is completely born by the column bottom straining beam, the newly added frame column does not transmit the bending moment to the existing frame column at the moment, the existing frame column only bears the vertical load of the added structure, the change of the internal force is limited, the internal force of the existing frame beam is almost unchanged, and the original structure is only reinforced or not reinforced in a small range. On the premise of ensuring the lateral stiffness resistance of the newly added structure, the method greatly improves the progress of the adding process and reduces the cost of the adding process. The utility model has simple structure and easy quality guarantee.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of a portion of the structure of the present invention;
FIG. 3 is a schematic structural view of a column bottom tie beam and an existing frame beam;
fig. 4 is a schematic structural view of a newly added building construction layer.
In the figure, 1-existing frame posts; 2-existing frame beam; 3-newly adding a frame column; 4-pulling the beam at the bottom of the column; 5-shearing reinforcement; 6-newly adding column reinforcing steel bars; 7-a sliding plate; 8-a floor slab; 9-transverse steel bars; 10-backfill layer; 11-conventional building finish.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
As shown in fig. 1 and fig. 2, the frame structure additional building system with column bottom tie beams of the present embodiment includes existing frame columns 1, and an existing frame beam 2 is connected between adjacent existing frame columns 1; the top of the existing frame column 1 is provided with a newly-added frame column 3, and a column bottom draw beam 4 is connected between the column bottoms of the adjacent newly-added frame columns 3; the newly-added frame column 3 is internally provided with a shear steel bar 5, and the lower section of the shear steel bar 5 is linearly implanted into the existing frame column 1.
Before setting the newly-added frame column, the column bottom concrete junction surface layer of the newly-added frame column needs to be removed, and the column bottom concrete junction surface layer is cleaned by using pressure water.
The column bottom of the newly added frame column 3 is only connected with the shear steel bars 5 with the column top of the original frame column, the column bottom straining beams 4 are arranged at the column bottom of the newly added frame column 3 in a bidirectional mode, the newly added frame column 3 is fixedly connected with the column bottom straining beams 4, and the column bottom of the newly added frame column 3 is approximately fixedly supported. The bending moment of the newly added frame column 3 at the column bottom is completely born by the column bottom tension beam 4, at the moment, the newly added frame column 3 does not transfer the bending moment to the existing frame column 1, the existing frame column 1 only bears the vertical load of the added structure, and the change of the internal force is limited. The building structure layer of the original structure is removed, light filler is used for backfilling after the building is built, the thickness of the built building structure layer is basically equivalent to that of the original structure layer, the internal force of the existing frame beam 2 is almost unchanged, and the original structure is only reinforced or not reinforced in a small range. On the premise of ensuring the lateral stiffness resistance of the newly added structure, the method greatly improves the progress of the adding process and reduces the cost of the adding process.
Furthermore, newly-added column reinforcing steel bars 6 are further arranged in the newly-added frame column 3, and the lower sections of the newly-added column reinforcing steel bars 6 are anchored into the column bottom tie beams 4 after being bent, so that the newly-added column reinforcing steel bars 6 are prevented from stretching into the existing frame column 1, and the newly-added frame column 3 is prevented from transmitting bending moment to the existing frame column 1.
And the length of the straight section anchored into the column bottom straining beam 4 after the lower section of the newly added column reinforcing steel bar 6 is bent is not less than 15d, and d is the diameter of the newly added column reinforcing steel bar 6.
The longitudinal steel bars of the column bottom tie beams 4 at the two sides of the newly added frame column 3 are designed to have the same diameter and number as much as possible, and the longitudinal steel bars at the two sides are required to penetrate through the newly added frame column 3. When the design results of the longitudinal steel bars of the column bottom tension beams 4 on the two sides are different greatly and cannot be designed to be the same in diameter and quantity, the longitudinal steel bars on the two sides should extend into the newly-added frame column 3, bend upwards on the opposite side of the column bottom tension beam 4 and be anchored into the newly-added frame column 3. The arrangement of the column bottom straining beams 4 at two sides of the newly added frame column 3 and the anchoring of the corresponding longitudinal steel bars realize the purpose that the column bottom bending moment of the newly added frame column 3 is born by the column bottom straining beams 4 at two sides.
When the longitudinal steel bars of the two side column bottom tension beams 4 are bent upwards, the straight section length from the top of the column bottom tension beam 4 is not less than 15d, the total anchoring length from the corresponding side column side of the tension beam is not less than 1.5LabE, d is the diameter of the longitudinal steel bar, and the LabE is the basic anchoring length of the tension steel bar in the earthquake-resistant design and is determined by concrete standard calculation.
As shown in fig. 3, in order to avoid that the post bottom tension beam 4 affects the internal forces of the existing frame beam 2, a layer of sliding plate 7 is laid between the existing frame beam 2 and the post bottom tension beam 4. Before arranging the column bottom straining beam, the concrete junction surface of the column bottom straining beam bottom is polished to be smooth and is cleaned by pressure water. A sliding plate 7 is arranged between the existing frame beam 2 and the column bottom straining beam 4, so that a sliding surface is formed between the column bottom straining beam 4 and the existing frame beam 2, a superposed beam stress system formed by the column bottom straining beam 4 and the existing frame beam 2 is avoided, and influence on the internal force of the existing frame beam 2 is avoided.
Wherein, the thickness of the sliding plate 7 is 2-5 mm. The optimal thickness of the sliding plate 7 is 3mm, which ensures that a stable sliding surface is formed between the column bottom straining beam 4 and the existing frame beam 2. The sliding plate 7 may be a galvanized steel plate.
The horizontal projection range of the newly-added frame column 3 does not exceed the column top edge of the existing frame column 1, so that the existing frame column 1 can reliably support the newly-added frame column 3, and the column top stress of the existing frame column 1 is more balanced. Newly-added column reinforcing steel bars 6 are arranged between the newly-added frame columns 3 and the column bottom tension beams 4 on the two sides, so that each newly-added frame column 3 is connected with two column bottom tension beams 4.
Furthermore, a transverse steel bar 9 is arranged in the column bottom straining beam 4, one end of the transverse steel bar 9 extending out of the column bottom straining beam 4 penetrates through the newly added frame column 3 and is bent upwards at the position close to the opposite column bottom straining beam 4 to be anchored into the newly added frame column 3. The transverse steel bars 9 in the column bottom straining beams 4 penetrate through the newly-added frame columns 3 and are anchored into the newly-added frame columns 3 after being bent, so that the column bottom straining beams 4 are more reliably connected with the newly-added frame columns 3.
Furthermore, the space between the column bottom straining beams 4 is backfilled by adopting light filler to form a backfill layer 10, the thickness of the backfill layer 10 is consistent with the height of the column bottom straining beams 4, a conventional building surface layer 11 is arranged above the backfill layer 10, and the backfill layer 10 and the conventional building surface layer 11 form a newly-added building structural layer. In the area where the column bottom tie beam 4 is not arranged above the existing frame beam 2, the building structure layer above the existing structure plate surface needs to be removed before additional construction. After the building is built, the area where the building structural layer is removed is backfilled by adopting light fillers such as slag, the thickness of the backfill layer 10 is consistent with the height of the column bottom tie beam 4, a conventional building surface layer 11 is arranged above the backfill layer 10, and the backfill layer 10 and the conventional building surface layer 11 form a new building structural layer together.
The height of the column bottom straining beam 4 is less than or equal to 250mm, and the influence of the column bottom straining beam 4 on the thickness of the building structure can be reduced. The arrangement direction of the column bottom straining beam 4 is consistent with that of the existing frame beam 2, so that the existing frame beam 2 can reliably support the column bottom straining beam 4.
No new floor 8 is arranged between the column bottom tension beams 4, and only a building surface layer is arranged. The floor slabs 8 are arranged between the existing frame beams 2, and no new floor slabs 8 are arranged between the column bottom tension beams 4, so that the new column bottom tension beams 4 only bear dead weight and do not bear extra floor load, and the influence on the internal force of the existing frame beams 2 is avoided.
Furthermore, a drill hole is arranged on one side of the existing frame column 1 facing the newly-added frame column 3, and the lower section of the shear steel bar 5 is linearly implanted into the drill hole of the existing frame column 1. When installing newly-added frame post 3, carry out the drilling to the capital that has the frame post earlier, make things convenient for shear reinforcement 5's hypomere to implant in it. The anchoring length of the shear steel bar 5 in the newly-added frame column 3 is determined according to the concrete standard requirement, and the planting depth of the shear steel bar 5 in the existing frame column 1 is determined according to the planting calculation.
The utility model is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
1. A frame structure additional building system with column bottom straining beams comprises existing frame columns (1), wherein existing frame beams (2) are connected between adjacent existing frame columns (1); the novel frame column is characterized in that a newly added frame column (3) is arranged at the top of the existing frame column (1), and a column bottom straining beam (4) is connected between every two adjacent newly added frame columns (3); shear steel bars (5) are arranged in the newly-added frame column (3), and the lower sections of the shear steel bars (5) are linearly implanted into the existing frame column (1).
2. The frame structure additional building system with the column bottom tie beam according to claim 1, wherein a new column adding steel bar (6) is further arranged in the new frame column (3), and the lower section of the new column adding steel bar (6) is anchored into the column bottom tie beam (4) after being bent.
3. A frame structure building system with post-bottom tie-beams according to claim 1, characterized in that a layer of sliding plates (7) is laid between the existing frame beams (2) and the post-bottom tie-beams (4).
4. A frame structure building system with column bottom tie beams according to claim 3, characterized in that the thickness of the sliding plate (7) is 2-5 mm.
5. A frame structure building system with column bottom tie beams according to claim 1, characterized in that the arrangement direction of the column bottom tie beams (4) is the same as the arrangement direction of the existing frame beams (2).
6. A frame structure building system with post bottom tie beam according to claim 1, characterized in that the horizontal projection range of the new frame post (3) does not exceed the top edge of the existing frame post (1).
7. A frame structure addition system with column bottom tie beams according to claim 1, characterized in that the height of the column bottom tie beams (4) is less than or equal to 250 mm.
8. A frame structure additional building system with column bottom tie beams according to claim 1, characterized in that transverse steel bars (9) are arranged in the column bottom tie beams (4), one ends of the transverse steel bars (9) extending out of the column bottom tie beams (4) penetrate through the new frame columns (3) and are bent upwards and anchored into the new frame columns (3) at positions close to the opposite column bottom tie beams (4).
9. A frame structure additional building system with column bottom tie beams according to claim 1, characterized in that the gaps between the column bottom tie beams (4) are backfilled by light filler to form backfill layers (10), the thickness of the backfill layers (10) is consistent with the height of the column bottom tie beams (4), conventional building surface layers (11) are arranged above the backfill layers (10), and the backfill layers (10) and the conventional building surface layers (11) form a new additional building structure layer.
10. The frame structure additional building system with the column bottom tension beam as claimed in any one of claims 1 to 9, wherein a drill hole is formed in one side of the existing frame column (1) facing the newly added frame column (3), and the lower section of the shear steel bar (5) is linearly implanted into the drill hole of the existing frame column (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121479440.1U CN215406527U (en) | 2021-06-30 | 2021-06-30 | Frame structure additional building system with column bottom tie beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121479440.1U CN215406527U (en) | 2021-06-30 | 2021-06-30 | Frame structure additional building system with column bottom tie beam |
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| CN215406527U true CN215406527U (en) | 2022-01-04 |
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| CN202121479440.1U Active CN215406527U (en) | 2021-06-30 | 2021-06-30 | Frame structure additional building system with column bottom tie beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445623A (en) * | 2021-06-30 | 2021-09-28 | 中国建筑西南设计研究院有限公司 | Frame structure additional building system with column bottom tie beam |
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2021
- 2021-06-30 CN CN202121479440.1U patent/CN215406527U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445623A (en) * | 2021-06-30 | 2021-09-28 | 中国建筑西南设计研究院有限公司 | Frame structure additional building system with column bottom tie beam |
| CN113445623B (en) * | 2021-06-30 | 2024-08-20 | 中国建筑西南设计研究院有限公司 | Frame structure additional construction system with column bottom pull beam |
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