CN217924100U - Existing concrete frame column and newly-increased I-shaped steel frame column base connecting node - Google Patents
Existing concrete frame column and newly-increased I-shaped steel frame column base connecting node Download PDFInfo
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- CN217924100U CN217924100U CN202221918930.1U CN202221918930U CN217924100U CN 217924100 U CN217924100 U CN 217924100U CN 202221918930 U CN202221918930 U CN 202221918930U CN 217924100 U CN217924100 U CN 217924100U
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Abstract
The utility model discloses a connecting node of an existing concrete frame column and a newly added I-shaped steel frame column base, which comprises an I-shaped steel column and an existing concrete column, wherein the top of the existing concrete column is provided with an enlarged column head formed by enlarging the cross section, and a longitudinal stress steel bar and a steel plate hoop are embedded in the enlarged column head; the root of the longitudinal stress steel bar is welded with the steel plate hoop; pouring a concrete column pier at the top of the existing concrete column; an embedded steel plate and foundation bolts are embedded in the concrete column piers; the I-shaped steel column is fixed on the top of the enlarged column head through a pre-buried steel plate and foundation bolts; the enlarged column cap is connected with the concrete column pier through a longitudinal stressed steel bar. The utility model discloses guarantee effectively transmit the stress of newly-increased steel construction to lower part concrete structure in, effectively improve the whole anti-seismic performance of rebuilding back building.
Description
Technical Field
The utility model belongs to the technical field of building engineering, specifically be existing concrete frame post and newly-increased I shaped steel frame column base connected node.
Background
At present, for storey-adding projects in industrial and civil buildings, a scheme of adding a steel frame on the top of the existing building is mostly adopted. The connection of the steel frame and the existing concrete structure has the characteristic of obvious sudden change of rigidity and mass in the vertical direction, and when the steel frame is acted by a horizontal load, the newly-added steel frame structure has larger deformation. The rigid connection design of the column base of the concrete column and the steel column is crucial to ensuring that the internal force of the newly increased steel structure is effectively transmitted to the concrete structure and improving the overall anti-seismic performance of the reconstructed building.
The common concrete column and steel column rigid connection mode has three forms, firstly, drilling at the existing concrete column top, through planting the bar and welding with pre-buried steel sheet, pre-buried steel sheet passes through bolted connection with pre-buried steel sheet after planting bar intensity reaches the requirement. Secondly, indulge the muscle heating alignment with existing concrete column, indulge the muscle and weld with pre-buried steel sheet, pass through bolted connection with pre-buried steel sheet. And thirdly, fixing the embedded steel plate and the existing concrete beam below the steel column by using a U-shaped bolt, and connecting the embedded steel plate and the embedded steel plate through a bolt. The method finds that the stressed steel bars in the existing concrete column are distributed densely in the application process, and the embedded steel bars hardly guarantee the steel bar spacing. The strength of the steel bar in the existing concrete column is not easy to guarantee after the steel bar is straightened. The embedded steel plate and the concrete beam are fixed by the U-shaped bolts, so that the existing concrete beam is inevitably damaged.
Therefore, the horizontal and vertical stresses of the newly added steel frame structure cannot be effectively transmitted to the lower concrete structure, and the overall anti-seismic performance of the reconstructed building cannot be effectively improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an existing concrete frame post and newly-increased I-shaped steel frame column base connected node guarantee will newly-increased the stress of steel construction effectively transmit to lower part concrete structure in, effectively improve the whole anti-seismic performance of rebuilding back building.
The utility model adopts the technical proposal that: the existing concrete frame column and a newly-added I-shaped steel frame column base connecting node comprises an I-shaped steel column and an existing concrete column, wherein an enlarged column head formed by enlarging the cross section is arranged at the top of the existing concrete column, and a longitudinal stress steel bar and a steel plate hoop are embedded in the enlarged column head; the root of the longitudinal stress steel bar is welded with the steel plate hoop; pouring a concrete column pier at the top of the existing concrete column; embedded steel plates and foundation bolts are embedded in the concrete column piers; the I-shaped steel column is fixed on the top of the enlarged column head through a pre-buried steel plate and foundation bolts; the enlarged column cap is connected with the concrete column pier through a longitudinal stressed steel bar.
The utility model is also characterized in that,
the flange of the I-shaped steel column is provided with a stud.
Stiffening ribs are arranged on two sides of a web plate at the joint of the I-shaped steel column and the top of the concrete column pier.
The enlarged column head is connected with the concrete column pier through a longitudinal stressed steel bar and a stirrup, and the stirrups in the enlarged column head penetrate through the beams and are welded with each other.
The periphery of the existing concrete column is also connected with existing concrete beams.
The utility model has the advantages that:
(1) The utility model discloses bury the steel sheet hoop underground in the column cap is enlarged at the concrete column top, and all newly-increased vertical atress muscle and steel sheet hoop welding have solved the difficult problem of the difficult anchor of newly-increased vertical atress muscle root, have avoided the destruction to original concrete column.
(2) The utility model discloses the vertical atress reinforcing bar that concrete column top enlarges column cap and roofing new concrete column mound link up, indulges the muscle root and has the effective anchor of steel sheet hoop, indulges the muscle top and effectively connects through the closed stirrup, will enlarge the column cap and be connected as whole with the new concrete column mound.
(3) The utility model discloses a concrete column top enlarges being connected of column cap and roofing new concrete column mound and is a whole with existing concrete column and new steel column rigid connection, ensures effectively transmitting the level and the vertical stress of new steel column to the concrete column in.
Drawings
FIG. 1 is a perspective view of a column base joint of the present invention;
FIG. 2 is a schematic view of the column base joint connection structure of the present invention;
FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 5 is a cross-sectional view taken along line C-C of FIG. 2;
in the figure: 1. an I-shaped steel column; 2. a stiffening rib; 3. a stud; 4. hooping; 6. concrete piers; 8. anchor bolts; 9. beam-penetrating stirrups; 10. pre-burying a steel plate; 11. enlarging the column cap; 12. existing concrete beams; 13. a steel plate hoop; 14. longitudinal stress ribs; 15. there are existing concrete columns.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1-5, the present invention relates to a connection node between an existing concrete frame column and a newly added i-shaped steel frame column base, which comprises an i-shaped steel column 1 and an existing concrete column 15, wherein an enlarged column head 11 formed by enlarging a cross section is arranged on the top of the existing concrete column 15, and a longitudinal stress steel bar 14 and a steel plate hoop 13 are embedded in the enlarged column head 11; the root of the longitudinal stress steel bar 14 is welded with the steel plate hoop 13; the concrete column pier 6 is poured at the top of the existing concrete column 15; an embedded steel plate 10 and foundation bolts 8 are embedded in the concrete pier 6; the I-shaped steel column 1 is fixed at the top of the expanded column head 11 through an embedded steel plate 10 and foundation bolts 8; the enlarged column cap 11 is connected with the concrete column pier 6 through a longitudinal stress steel bar 14.
The flange of the I-shaped steel column 1 is provided with a stud 3, and the stud 3 is used for reinforcing and connecting the I-shaped steel column 1 and a concrete pier 6.
The enlarged column head 11 and the concrete column pier 6 are connected with the stirrups 4 through longitudinal stressed steel bars 14, and the stirrups in the enlarged column head 11 penetrate the beam and are mutually welded to form a beam penetrating stirrup 9.
The top of the concrete pier 6 is provided with three stirrups 4 with the spacing of 50mm; the distance between the stirrups at the other parts is 200mm.
The periphery of the existing concrete column 15 is also connected with an existing concrete beam 12.
The section of the top of the existing concrete column 15 is enlarged to form an enlarged column head 11, and longitudinal stress steel bars 14 and steel plate hoops 13 are buried in the enlarged column head 11.
The height of the concrete pier 6 is not less than three times of the section height of the I-shaped steel column 1.
The I-shaped steel column 1 is fixed on the top of the enlarged column head 11 through an embedded steel plate 10 and an anchor bolt 8.
The existing connecting joint of the concrete frame column and the newly-added I-shaped steel frame column base is assembled according to the following steps:
1) Firstly, determining the position of a beam column of a roof with an existing concrete structure, paying off the position and the size of an enlarged column head, and drilling a hole on the roof with the concrete structure according to the position and the diameter of a designed longitudinal stress steel bar. And drilling holes on the top beam of the concrete structure according to the designed position of the stirrup of the expanded column head section, and mutually welding the anchored stirrups. And welding steel plate hoops around the concrete column at the top layer of the concrete structure according to the designed position, and enlarging the bottom of the column head to arrange a template to position the steel plate hoops. Inserting longitudinal stressed steel bars downwards into the roof drill holes, expanding the newly added stressed steel bars at the column head section to be firmly bound with the through beam stirrups, and welding the bottoms of the longitudinal stressed steel bars with the steel plate hoops;
2) The top concrete column is roughened in a mode that the range of the column head is enlarged, templates are arranged on the periphery of the top concrete column, high-strength non-shrinkage grouting materials are poured and maintained, the height of the column head is enlarged to meet the anchoring length of newly-added stressed steel bars, construction of the column head is enlarged, and the templates are removed after the strength requirement is met;
3) Stud is arranged at the flange of the newly added I-shaped steel column, and stiffening ribs are arranged on two sides of a web plate at the joint of the top of the concrete column pier. The method comprises the steps of roughening the head of an original concrete column of a roof, drilling a hole in the existing concrete column head according to the design positions of an embedded steel plate and an anchor bolt, embedding the steel plate, implanting the anchor bolt, and adjusting the embedded steel plate and the anchor bolt according to the design elevation requirement of a steel column. After the completion, a high-strength non-shrinkage grouting material fixing bottom plate and foundation bolts are poured under the embedded steel plates;
4) And binding stirrups at the concrete pier section according to design requirements, wherein the stirrups are firmly bound with the longitudinal stressed steel bars. And (3) arranging a template at the concrete column pier section, pouring high-strength non-shrinkage grouting material according to the design height of the concrete column pier and carrying out maintenance, wherein the height of the concrete column pier is not less than three times of the section height of the I-shaped steel column, completing construction of the concrete column pier, dismantling the template after the strength requirement is met, and completing construction of the connection node.
The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.
Claims (5)
1. Existing concrete frame post and newly-increased I shaped steel frame column base connected node, its characterized in that: the steel column comprises an I-shaped steel column (1) and an existing concrete column (15), wherein an enlarged column head (11) formed by enlarging the cross section is arranged at the top of the existing concrete column (15), and a longitudinal stressed steel bar (14) and a steel plate hoop (13) are embedded in the enlarged column head (11); the root of the longitudinal stress steel bar (14) is welded with the steel plate hoop (13); the concrete column pier (6) is poured on the top of the existing concrete column (15); an embedded steel plate (10) and foundation bolts (8) are embedded in the concrete column pier (6); the I-shaped steel column (1) is fixed to the top of the enlarged column head (11) through an embedded steel plate (10) and foundation bolts (8); the enlarged column cap (11) is connected with the concrete column pier (6) through a longitudinal stressed steel bar (14).
2. The existing concrete frame column and newly-added I-shaped steel frame column base connecting node according to claim 1, characterized in that: the flange of the I-shaped steel column (1) is provided with a stud (3), and the stud (3) is used for reinforcing and connecting the I-shaped steel column (1) and the concrete pier (6).
3. The existing concrete frame column and newly-added I-shaped steel frame column base connecting node according to claim 1, characterized in that: stiffening ribs (2) are arranged on two sides of a web plate at the joint of the top of the I-shaped steel column (1) and the top of the concrete column pier (6).
4. The existing concrete frame column and newly-added I-shaped steel frame column base connecting node according to claim 1, characterized in that: the expanded column head (11) and the concrete column pier (6) are connected with the stirrups (4) through longitudinal stressed steel bars (14), and the stirrups in the expanded column head (11) penetrate through the beams and are welded with each other.
5. The existing concrete frame column and newly-added I-shaped steel frame column base connecting node according to claim 1, characterized in that: the periphery of the existing concrete column (15) is also connected with an existing concrete beam (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221918930.1U CN217924100U (en) | 2022-07-22 | 2022-07-22 | Existing concrete frame column and newly-increased I-shaped steel frame column base connecting node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221918930.1U CN217924100U (en) | 2022-07-22 | 2022-07-22 | Existing concrete frame column and newly-increased I-shaped steel frame column base connecting node |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217924100U true CN217924100U (en) | 2022-11-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221918930.1U Active CN217924100U (en) | 2022-07-22 | 2022-07-22 | Existing concrete frame column and newly-increased I-shaped steel frame column base connecting node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217924100U (en) |
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2022
- 2022-07-22 CN CN202221918930.1U patent/CN217924100U/en active Active
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