阅读说明：本技术 一种钢管混凝土柱与钢筋混凝土柱的拼接节点及施工方法 (Splicing joint of steel pipe concrete column and reinforced concrete column and construction method ) 是由 胡红松 陈振新 郭子雄 于 2020-06-30 设计创作，主要内容包括：本发明公开一种钢管混凝土柱与钢筋混凝土柱的拼接节点及施工方法,涉及建筑结构技术领域。本发明的拼接节点包括下部的钢管混凝土柱、上部的钢筋混凝土柱和中部的拼接部件；拼接部件连接钢管混凝土柱和钢筋混凝土柱；拼接部件包括闭环槽钢；拼接部件的上下两端面为闭环槽钢的翼缘板表面,上下翼缘板均开设有多个通孔；钢管混凝土柱包括中空的钢管；钢管和拼接部件的下端面焊接在一起；钢筋混凝土柱包括多条钢筋,每条钢筋向下依次穿过上下翼缘板的通孔,并伸入钢管内部空间；钢管的截面和拼接部件的上下两端面的外形尺寸均相同。本发明的拼接节点结构牢固,可保证钢筋混凝土柱与钢管混凝土柱之间的荷载传递,同时该节点构造简单、施工方便。(The invention discloses a splicing joint of a steel pipe concrete column and a reinforced concrete column and a construction method, and relates to the technical field of building structures. The splicing node comprises a steel pipe concrete column at the lower part, a reinforced concrete column at the upper part and a splicing part in the middle part; the splicing parts are connected with the steel pipe concrete column and the reinforced concrete column; the splicing component comprises a closed loop channel steel; the upper end surface and the lower end surface of the splicing part are flange plate surfaces of the closed-loop channel steel, and the upper flange plate and the lower flange plate are both provided with a plurality of through holes; the steel tube concrete column comprises a hollow steel tube; the steel pipe is welded with the lower end face of the splicing part; the reinforced concrete column comprises a plurality of steel bars, and each steel bar sequentially penetrates through the through holes of the upper flange plate and the lower flange plate downwards and extends into the inner space of the steel pipe; the cross section of the steel pipe is the same as the appearance sizes of the upper end surface and the lower end surface of the splicing part. The splicing joint has a firm structure, can ensure the load transmission between the reinforced concrete column and the steel pipe concrete column, and has simple structure and convenient construction.)

1. A splicing node of a steel tube concrete column and a reinforced concrete column is characterized by comprising a steel tube concrete column at the lower part, a reinforced concrete column at the upper part and a splicing part in the middle part; the splicing parts are connected with the steel pipe concrete column and the reinforced concrete column;

the splicing component comprises a closed loop channel steel; the upper end surface and the lower end surface of the splicing part are flange plate surfaces of the closed-loop channel steel, and the upper flange plate and the lower flange plate are both provided with a plurality of through holes; the side surface of the splicing part is the outer side surface of a web plate of the closed-loop channel steel;

the steel tube concrete column comprises a hollow steel tube; the steel pipe and the lower end face of the splicing part are welded together;

the reinforced concrete column comprises a plurality of steel bars, and each steel bar sequentially penetrates through the through holes of the upper flange plate and the lower flange plate downwards and extends into the inner space of the steel pipe;

the cross section of the steel pipe is the same as the external dimensions of the upper end face and the lower end face of the splicing part.

2. The concrete filled steel tubular column and reinforced concrete column splicing node of claim 1, further comprising concrete cast around the steel bars, within the splicing parts and within the steel tubes; the cross-section overall dimension of the formed concrete column poured around the steel bars is the same as the overall dimension of the upper end face of the splicing part.

3. The concrete-filled steel tubular column and reinforced concrete column splicing node of claim 1, wherein the closed loop channel steel is formed by welding a plurality of channel steel heads and tails, and the closed loop channel steel is square or circular.

4. The concrete-filled steel tubular column and reinforced concrete column splicing node of claim 2, wherein the closed loop channel steel is square in shape, hollow, and overall in a shape like a Chinese character 'hui', and is formed by welding four trapezoidal channel steels, and the upper flange plate and the lower flange plate of the trapezoidal channel steel are both trapezoidal.

5. The concrete-filled steel tubular column and reinforced concrete column splicing node of claim 1, wherein the web height is greater than or equal to the anchoring length, and the web thickness is greater than or equal to the wall thickness of the steel tube.

6. The concrete-filled steel tubular column and reinforced concrete column splicing node of claim 1, wherein the through hole is circular, and the diameter of the through hole is 3-5 mm larger than the diameter d of the steel bar; the distance between the center of the through hole and the edge of the flange plate is more than or equal to 1.5 d.

7. The concrete-filled steel tubular column and reinforced concrete column splicing joint according to claim 1, wherein the length of the steel bar extending into the steel tube is 5-15 cm.

8. The concrete-filled steel tubular column and reinforced concrete column splicing node according to claim 1, wherein a plurality of stiffening ribs are arranged inside the closed loop channel steel, the stiffening ribs are plate-shaped, and the side edges of the stiffening ribs are welded to the upper flange plate, the lower flange plate and the web plate in sequence and avoid the through holes; the thickness of the stiffening ribs is more than or equal to b/15, the spacing between the stiffening ribs is b-3 b, and b is the overhanging width of the flange plate.

9. The construction method of the splicing joint of the steel pipe concrete column and the reinforced concrete column as recited in claims 1 to 8, characterized by comprising the following steps:

cutting a plurality of channel steels, forming a plurality of groups of opposite through holes on upper and lower flange plates of each channel steel, and welding the channel steels after the holes are formed end to obtain closed-loop channel steels;

welding the closed loop channel steel with the steel pipe;

vertically penetrating each steel bar through a through hole of an upper flange plate and a through hole of a lower flange plate of the closed-loop channel steel from top to bottom in sequence, then extending into the inner space of the steel pipe, and then performing spot welding at the positions of the upper through hole and the lower through hole through which the steel bar penetrates so as to fix the steel bar on the closed-loop channel steel; inserting and welding all the steel bars according to the steps;

binding stirrups and erecting templates on all the steel bars, pouring and tamping the whole concrete, enabling the concrete to enter the periphery of the steel bars, the closed-loop channel steel and the steel pipes, and removing the templates after the concrete is hardened to complete the splicing of the steel pipe concrete column and the reinforced concrete column.

10. The construction method of a splicing node of a steel core concrete column and a reinforced concrete column according to claim 9, further comprising welding a stiffening rib in the inner space of the channel steel after the channel steel is perforated and before the channel steel is welded end to end, wherein the stiffening rib avoids the through hole, and the side edge of the stiffening rib is welded to the upper flange plate, the web plate and the lower flange plate of the channel steel.

Technical Field

The invention belongs to the technical field of building structures, and particularly relates to a splicing node of a steel pipe concrete column and a reinforced concrete column and a construction method.

Background

The steel pipe concrete column is a novel efficient combined member developed in recent years, can give full play to the material properties of steel and concrete, and has the advantages of high bearing capacity, good earthquake resistance and the like, so that the steel pipe concrete column is more and more widely applied to high-rise buildings. However, with the increase of the height of the steel pipe concrete column in the building, the vertical load borne by the structure is gradually reduced, and the steel pipe concrete column does not need to be continuously adopted. Therefore, after reaching a certain height, the steel pipe concrete column can be replaced by the reinforced concrete column, so that steel is saved, and the manufacturing cost is reduced. However, because the splicing of the steel pipe concrete column and the reinforced concrete column is difficult, no reliable splicing mode exists at present, and the application of the steel pipe concrete column and the reinforced concrete column in high-rise buildings is restricted.

Disclosure of Invention

The invention aims to provide a splicing joint of a steel pipe concrete column and a reinforced concrete column and a construction method aiming at the defects in the prior art, so that the manufacturing cost is reduced, the splicing is firm, the structure is simple, and the construction is convenient.

Therefore, the invention firstly provides a splicing node of the steel tube concrete column and the reinforced concrete column, which comprises the steel tube concrete column at the lower part, the reinforced concrete column at the upper part and a splicing part at the middle part; the splicing parts are connected with the steel pipe concrete column and the reinforced concrete column.

The splicing component comprises a closed loop channel steel; the upper end surface and the lower end surface of the splicing part are flange plate surfaces of the closed-loop channel steel, and the upper flange plate and the lower flange plate are both provided with a plurality of through holes; the side face of the splicing part is the outer side face of a web plate of the closed-loop channel steel.

The steel tube concrete column comprises a hollow steel tube; the steel pipe and the lower end face of the splicing part are welded together.

The reinforced concrete column comprises a plurality of steel bars, and each steel bar sequentially penetrates through the through holes of the upper flange plate and the lower flange plate downwards and extends into the inner space of the steel pipe.

The cross section of the steel pipe is the same as the external dimensions of the upper end face and the lower end face of the splicing part.

Furthermore, the splicing node also comprises concrete poured around the steel bars, in the splicing parts and in the steel pipes; the cross-section overall dimension of the formed concrete column poured around the steel bars is the same as the overall dimension of the upper end face of the splicing part.

Furthermore, the closed-loop channel steel is formed by mutually welding a plurality of channel steel heads and tails, and the closed-loop channel steel is square or circular.

Preferably, the closed loop channel steel is square in shape, hollow, and is integrally in a shape like a Chinese character 'hui', and is formed by welding four trapezoidal channel steel pieces, wherein each trapezoidal channel steel piece is in a shape like a Chinese character 'hui', and the upper flange plate and the lower flange plate of each trapezoidal channel steel piece are in a shape like a trapezoid.

Preferably, the height of the web is more than or equal to the basic anchoring length of the steel bar, and the thickness of the web is more than or equal to the wall thickness of the steel pipe.

Preferably, the through hole is circular, and the diameter of the through hole is 3-5 mm larger than the diameter d of the steel bar; the distance between the center of the through hole and the edge of the flange plate is more than or equal to 1.5 d.

Preferably, the length of the steel bar extending into the steel pipe is 5-15 cm.

Preferably, a plurality of stiffening ribs are arranged in the closed-loop channel steel, the stiffening ribs are plate-shaped, and the side edges of the stiffening ribs are welded to the upper flange plate, the lower flange plate and the web plate in sequence and avoid the through holes; the thickness of the stiffening ribs is more than or equal to b/15, the spacing between the stiffening ribs is b-3 b, and b is the overhanging width of the flange plate.

The invention also provides a construction method of the splicing joint of the steel pipe concrete column and the reinforced concrete column, which comprises the following steps:

(1) cutting a plurality of channel steels, forming a plurality of groups of opposite through holes on upper and lower flange plates of each channel steel, and welding the channel steels after the holes are formed end to obtain closed-loop channel steels;

(2) welding the closed loop channel steel with the steel pipe;

(3) vertically penetrating each steel bar through a through hole of an upper flange plate and a through hole of a lower flange plate of the closed-loop channel steel from top to bottom in sequence, then extending into the inner space of the steel pipe, and then performing spot welding at the positions of the upper through hole and the lower through hole through which the steel bar penetrates so as to fix the steel bar on the closed-loop channel steel; inserting and welding all the steel bars according to the steps;

(4) binding stirrups and erecting templates on all the steel bars, pouring and tamping the whole concrete, enabling the concrete to enter the periphery of the steel bars, the closed-loop channel steel and the steel pipes, and removing the templates after the concrete is hardened to complete the splicing of the steel pipe concrete column and the reinforced concrete column.

Preferably, in the above construction method, after the channel steel is perforated and before the channel steel is welded end to end, a stiffening rib is welded in the inner space of the channel steel, the stiffening rib avoids the through hole, and the side edge of the stiffening rib is welded to the upper flange plate, the web plate and the lower flange plate of the channel steel.

The invention has the beneficial effects that: the splicing joint structure of the steel pipe concrete column and the reinforced concrete column is firm, and can ensure the load transmission between the reinforced concrete column and the steel pipe concrete column. When the reinforced concrete column is subjected to the bending action, the pressure of the steel bars on the pressure side can be transmitted to the upper flange of the channel steel through the anchoring force of the steel bars in the upper concrete and then transmitted to the lower steel pipe; the tension side steel bar can transmit tension to the lower flange of the channel steel through the anchoring force transmission of the steel bar in the lower concrete and then transmit the tension to the lower steel pipe, so that the splicing joint has good force transmission performance and connection effectiveness is guaranteed. Meanwhile, the node is simple in structure and convenient to construct. The invention realizes the splicing of the steel pipe concrete column and the reinforced concrete column and has wide application prospect in high-rise buildings.

Drawings

FIG. 1 is a perspective view of a splice component;

FIG. 2 is a vertical cross-section of the splice;

FIG. 3 is a transverse cross-sectional view of a splice member;

FIG. 4 is a schematic structural view of a splicing part welded with a lower steel pipe;

FIG. 5 is a schematic structural view of a splicing member welded to a lower steel pipe and an upper steel bar;

fig. 6 is a schematic structural view of a splicing node of a steel tube concrete column and a reinforced concrete column.

The labels in the figure are: 1-a splice component; 2-a steel tube concrete column; 3-a reinforced concrete column;

11-channel steel; 12-a through hole; 13-a stiffener; 21-a steel pipe; 31-reinforcing steel bars;

111-a web; 112-flange plate.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.