CN103161224A - Rectangular concrete filled steel tubular column - steel beam connection node and construction methods thereof - Google Patents

Abstract

The invention belongs to the technical field of architectural structure engineering and relates to a rectangular concrete filled steel tubular column - steel beam connection node. The rectangular concrete filled steel tubular column - steel beam connection node comprises an upper through partition board (3), a lower through partition board (4), a connection board (5) and a high-strength bolt (6). The rectangular concrete filled steel tubular column - steel beam connection node is characterized in that the upper through partition board (3) and the lower through partition board (4) penetrate through the wall of a rectangular concrete filled steel tubular column (1) and are in bevel welding connection with the periphery of the wall, the connection board (5) is connected between the lateral wall of the rectangular concrete filled steel tubular column (1) and a web of a steel beam (2), the lower through partition board (4) is connected with the bottom flange of the steel beam (2) through the high-strength bolt (6), and the upper through partition board (3) is in bevel welding connection with the upper flange of the steel beam (2). The invention further provides two construction methods of the rectangular concrete filled steel tubular column - steel beam connection node. The rectangular concrete filled steel tubular column - steel beam connection node and the construction methods thereof have the advantages that location is fast for site installation, the construction period can be shortened obviously, and the prefabricated construction progress is promoted.

Description

A Rectangular Steel Tube Concrete Column-Steel Beam Connection Node and Its Construction Method

Technical field

The invention belongs to the technical field of building structure engineering, and in particular relates to a rectangular steel pipe concrete column-steel beam connection node and a manufacturing method thereof.

Background technique

Concrete filled steel pipe structure is composed of steel pipes filled with concrete. The existence of steel pipes can prevent premature cracking of concrete, and the existence of concrete can prevent premature buckling of steel pipes. The joint work of the two can give full play to the high tensile performance of steel and the good compressive performance of concrete. Therefore, it has many advantages such as high bearing capacity, good plasticity and toughness, good seismic performance, significant economic benefits and environmental protection in construction.

The rectangular concrete-filled steel tube structure has the advantages of high flexural rigidity and convenient joint connection. The frame structure system formed by rectangular steel tube concrete columns and steel beams has a good application prospect in high-rise and super high-rise buildings because of its flexible layout, simple structure, easy standardization of components, fast construction speed, and low cost. It has been widely valued by domestic and foreign engineering fields.

At present, my country's "Technical Regulations for Rectangular Steel Tube Concrete Structures" (CECS159: 2004) recommends four types of rectangular steel tube concrete column-steel beam connection nodes: inner diaphragm connection, inner diaphragm connection with short beams, outer ring plate type Connection, partition through connection. These nodes still have the following problems:

(1) Due to the difficulty of welding inside the joint, the pouring of concrete in the pipe is also affected by the internal diaphragm joint, which is often limited by the side length of the pipe string in application. In addition, beam flanges and inner diaphragms are welded on both sides of the steel pipe column at the same position, and the steel is hot-processed twice, which tends to generate large residual stress, resulting in brittle failure near the weld. Although the structure of the joint itself is intended to make the plastic hinge appear at the beam end, the stress concentration at the weld affects the development of the plastic hinge.

(2) Due to the structural characteristics of the outer ring plate nodes, the adaptability and flexibility are poor. The joint needs a sufficiently large horizontal ring plate to ensure the strength of the joint, and the amount of steel used is significantly increased. In addition, the setting of the outer ring plate makes it difficult to arrange the nodes at the corners, which brings unnecessary troubles to the architectural design. There are convex corners at the indoor corners, which affects the appearance

(3) The partitions extending from the top and bottom of the partition through-type joint cut off the column body, which weakens the column body to a certain extent, but the overall joint section can be prefabricated in the factory, and the construction process is relatively simple. Changes in column section dimensions. The node structure is simple, easy to make, and the indoor space layout is flexible. The force on the beam flange is directly transmitted to the column side, and the force transmission mechanism is clear, which is conducive to the transmission of bending moment and shear force at the beam end, reduces the local deformation of the steel pipe column wall, and ensures the working performance of the joint. However, there are also disadvantages such as large welding workload, twice welding of the lower flange weld seam, and difficult guarantee of welding quality.

In view of the poor seismic performance of traditional bolted and welded joints due to the influence of welds, some people in China proposed to use full bolted joints for construction. The actual engineering experience shows that the mechanical performance of the full-bolt joint is better, and the influence of the weld, especially the weld defect of the lower flange is avoided. However, due to the need to process and construct a large number of bolts and bolt holes, the cost is very high; and because bolt installation requires a long overhanging partition, the accuracy of bolt processing and on-site beam-column installation and positioning accuracy are very high. Once the column is tilted or If the beams cannot be centered, the construction will be very difficult.

Contents of the invention

The object of the present invention is to address the deficiencies of the prior art, and provide a connection and construction method of a rectangular steel tube concrete column-steel beam partition through joint with faster construction and more reasonable structure on the basis of the partition through joint. Technical scheme of the present invention is as follows:

A rectangular steel pipe concrete column-steel beam connection node, comprising an upper through partition (3), a lower through partition (4), a connecting plate (5), and high-strength bolts (6), characterized in that the upper through partition ( 3) The lower through partition (4) runs through the column wall of the rectangular concrete-filled steel tube column (1), and is connected with the surrounding wall of the column with a cut-out weld, and the connecting plate (5) is connected to the side wall of the rectangular steel tube concrete column (1) Between the web of the steel beam (2), it is characterized in that the lower through-beam (4) is connected to the lower flange of the steel beam (2) through high-strength bolts (6), and the upper through-beam (3) is welded seam connection to the upper flange of the steel beam (2).

The present invention simultaneously provides two construction methods for the above-mentioned connecting nodes,

One is:

1) According to the size of the rectangular concrete-filled steel tube column (1), process the upper through-through partition (3) and the lower through-through partition (4), on the side of the column without beam connection, and then pass through a quarter arc to make the transition between the partitions to the same width as the steel beam;

2) The upper through partition (3) transitions to the same width as the steel beam through a circular arc and stretches outward;

3) Bolt holes are reserved on the lower through partition (4), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the number of reserved holes is calculated by the bending moment borne by the beam flange;

4) Connect the upper through partition (3) and the lower through partition (4) with the column wall of the rectangular steel tube concrete column (1) through the cut-out weld;

5) Process the connection plate (5) according to the distance between the upper through partition (3) and the lower through partition (4), and the connection plate (5) is connected with the side wall of the column with a cut weld or a fillet weld;

6) Bolt holes are reserved on the lower flange of the steel beam (2), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the reserved holes must correspond to the upper holes of the lower through partition (3);

7) Cutting and grooving on the upper flange of the steel beam (2), the cutting and grooving lengths are matched with the extension length of the through partition (3);

8) Insert the steel beam (2) into the connecting plate (5), so that the upper flange of the steel beam (2) is aligned with the upper through partition (3), and the lower flange is located on the lower through partition (4). The web of the beam (2) and the connecting plate (5) are connected by high-strength bolts (6), the lower flange of the steel beam (2) and the lower through-wall partition (4) are connected by high-strength bolts (6), and the steel beam (2) ) is aligned with the upper through partition (3) and connected by split welds.

The other is:

1) According to the size of the rectangular concrete-filled steel tube column (1), process the upper through partition (3) and the lower through partition (4). Transition to the same width as the steel beam;

2) The upper through partition (3) transitions to the same width as the steel beam through a circular arc and stretches outward;

3) Bolt holes are reserved on the lower through partition (4), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the number of reserved holes is calculated by the bending moment borne by the beam flange;

4) Connect the upper through partition (3) and the lower through partition (4) with the column wall of the rectangular steel tube concrete column (1) through the cut-out weld;

5) Process the connection plate (5) according to the distance between the upper through partition (3) and the lower through partition (4), and the connection plate (5) is connected with the side wall of the column with a cut weld or a fillet weld;

6) Bolt holes are reserved on the lower flange of the steel beam (2), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the reserved holes must correspond to the upper holes of the lower through partition (3);

7) Cutting and grooving on the upper flange of the steel beam (2), the cutting and grooving lengths are matched with the extension length of the through partition (3);

8) Insert the steel beam (2) into the connecting plate (5), so that the upper flange of the steel beam (2) is aligned with the upper through partition (3), and the lower flange is located on the lower through partition (4). The web of the beam (2) and the connecting plate (5) are connected by high-strength bolts (6), the lower flange of the steel beam (2) and the lower through-wall partition (4) are connected by high-strength bolts (6), and the steel beam (2) ) is aligned with the upper through partition (3) and connected by split welds.

The node provided by the invention adopts the mixed connection of lower bolts and upper welding, and the lower flange is connected with the lower diaphragm by high-strength bolts, so the on-site installation is fast, the construction period can be significantly shortened, and the assembly process is promoted; the upper diaphragm and the upper flange adopt Welding with one weld seam on site reduces the difficulty of positioning due to column inclination or misalignment of all bolted connections. The upper surface elevations of the upper partition and the upper flange are unified to facilitate roof and floor installation, achieving the purpose of convenient construction, and There is no need to set too many connecting plates, the structure is simple, and the force transmission is clear; at the same time, due to the use of through-partition joints, the requirement of plastic hinges at the end of the beam can be moved outward, so that the damage of the steel beam is prior to the destruction of the joints, ensuring The safety of the nodes has reached the seismic fortification requirements of "strong nodes, weak components". Specifically, the beneficial effects are as follows:

1) Due to the existence of the through diaphragm, the stiffness of the joint area is increased, the plastic hinge is moved outward, the failure of the steel beam is earlier than the failure of the joint, and the seismic criterion of "strong joint weak member" is realized.

2) The through-wall of the joint and the column wall are cut-welded, which avoids multiple welding of the column wall, reduces the stress concentration and brittleness of the column wall, and improves the ductility of the node domain.

3) The lower flange of this node is connected by high-strength bolts, which reduces the workload of on-site welding, saves manpower, and improves construction efficiency. The bearing capacity of the negative moment area is greatly enhanced; at the same time, it avoids the adverse effect of the weld defect of the lower flange, effectively prevents the stress concentration caused by welding, and provides good seismic performance.

4) The upper flange and the upper through partition are connected by split welds, which reduces the risk of steel beams not being in place due to column inclination or misalignment due to medium construction errors of full bolt connection, reduces precision sensitivity, and speeds up installation speed.

5) This node can form a variety of nodes with different connection methods through the change of the connection position relationship between the lower flange of the steel beam and the lower diaphragm, which can meet the requirements of different projects for node performance and node construction methods.

6) There are fewer connecting plates at this node, the structure is simple, the force transmission is clear, the processing is convenient, the construction period is shortened, and the cost is reduced in all links.

Description of drawings

Fig. 1: embodiment side view;

Fig. 2: embodiment one 1-1 sectional view;

Fig. 3: embodiment one 2-2 sectional view;

Fig. 4: the side view of embodiment two;

Fig. 5: embodiment two 3-3 sectional view;

Fig. 6: sectional drawing of embodiment two 4-4;

Detailed ways

The present invention will be described below in conjunction with the embodiments of the accompanying drawings.

The present invention proposes a rectangular steel pipe concrete column-steel girder lower bolt and upper welded diaphragm connection joint, which is composed of the following parts: rectangular steel pipe concrete column, steel beam, upper through diaphragm, lower through diaphragm, connecting plate and high-strength bolt. The present invention has two main forms, and its realization method is as follows:

1. For Example 1:

Referring to Fig. 1, Fig. 2 and Fig. 3, the rectangular steel tube concrete column 1, the steel beam 2, the upper through partition 3, the lower through partition 4, the connecting plate 5, and the high-strength bolt 6, wherein, the upper through partition 3, the lower through Partition plate 4 runs through the column wall of rectangular steel pipe concrete column 1, and is connected with the steel pipe column wall with cut-out welds, connecting plate 5 is welded to the side wall of the column, the web plate of steel beam 2 is connected with connecting plate 5 by bolts, and the lower flange is connected with The lower through partition 4 is connected with high-strength bolts 6, and the upper flange is connected with the upper through partition 3 with a split weld.

In the above-mentioned beam-column connection node, the rectangular steel tube of the rectangular steel tube concrete column 1 is a welded steel plate, butt channel steel or cold-formed steel tube.

The steel beam 2 is an H-shaped steel beam or an I-shaped steel beam.

The concrete is ordinary concrete, high-strength concrete or self-compacting concrete.

The connecting plate 5 is connected with the side wall of the column by a cut weld or a fillet weld.

When this embodiment is used specifically, the implementation process is:

1) According to the size of the rectangular concrete-filled steel tube column 1, the upper through partition 3 and the lower through partition 4 are processed. On the side of the column not connected with the beam, the overhang of the partition can be 50mm. On the side of the column connected with the beam, the partition First extend 100mm, and then pass through a quarter arc with a radius of 60mm to make the partition transition to the same width as the steel beam;

2) The upper through partition 3 transitions to the same width as the steel beam through a circular arc and then extends 40mm;

3) Bolt holes are reserved on the lower through partition 4, the diameter of which is slightly larger than the diameter of the high-strength bolt 6, and the number of reserved holes is calculated by the bending moment borne by the beam flange;

4) Connect the upper through partition 3 and the lower through partition 4 with the column wall of the rectangular steel tube concrete column 1 through the cut-out weld;

5) Process the connecting plate 5 according to the distance between the upper through partition 3 and the lower through partition 4, and connect the connecting plate 5 and the side wall of the column with a cut weld or a fillet weld;

6) Bolt holes are reserved on the lower flange of the steel beam 2, the diameter of which is slightly larger than the diameter of the high-strength bolt 6, and the reserved holes must correspond to the upper holes of the lower through partition 3;

7) Cutting and grooving on the upper flange of the steel beam 2, the cutting and grooving lengths match the extension length of the penetrating partition 3 above;

8) Insert the steel beam 2 into the connecting plate 5 so that the upper flange of the steel beam 2 is aligned with the upper through partition 3, the lower flange is located on the lower through partition 4, and the web of the steel beam 2 and the connecting plate 5 are used The high-strength bolts 6 are connected, the lower flange of the steel beam 2 is connected with the lower through-wall partition 4 with high-strength bolts 6, the upper flange of the steel beam 2 is aligned with the upper through-wall partition 3, and connected by a split weld.

2. For the second embodiment:

Referring to Fig. 4, Fig. 5 and Fig. 6, the rectangular steel tube concrete column 1, the steel beam 2, the upper penetrating partition 3, the lower penetrating partition 4, the connecting plate 5, and the high-strength bolt 6, wherein, the upper penetrating partition 3, the lower penetrating partition Partition plate 4 runs through the column wall of rectangular steel pipe concrete column 1, and is connected with the steel pipe column wall with cut-out welds, connecting plate 5 is welded to the side wall of the column, the web plate of steel beam 2 is connected with connecting plate 5 by bolts, and the lower flange is connected with The lower through partition 4 is connected with high-strength bolts 6, and the upper flange is connected with the upper through partition 3 with a split weld.

In the above-mentioned beam-column connection node, the rectangular steel tube of the rectangular steel tube concrete column 1 is a welded steel plate, butt channel steel or cold-formed steel tube.

The steel beam 2 is an H-shaped steel beam or an I-shaped steel beam.

The concrete is ordinary concrete, high-strength concrete or self-compacting concrete.

The connecting plate 5 is connected with the side wall of the column by a cut weld or a fillet weld.

When this embodiment is used specifically, the implementation process is:

1) According to the size of the rectangular concrete-filled steel tube column 1, the upper through partition 3 and the lower through partition 4 are processed. On the side of the column not connected with the beam, the overhang of the partition can be 50mm. On the side of the column connected with the beam, the partition First, it is extended by 100mm, and then the width of the extended part of the partition is gradually reduced, so that the partition transitions to the same width as the steel beam at the end;

2) The upper through partition 3 is first extended by 100mm, and then the width of the partition is gradually reduced to the same width as the steel beam, and the tapered length is 100mm;

3) Bolt holes are reserved on the lower through partition 4, the diameter of which is slightly larger than the diameter of the high-strength bolt 6, and the number of reserved holes is calculated by the bending moment borne by the beam flange;

4) Connect the upper through partition 3 and the lower through partition 4 with the column wall of the rectangular steel tube concrete column 1 through the cut-out weld;

5) Process the connecting plate 5 according to the distance between the upper through partition 3 and the lower through partition 4, and connect the connecting plate 5 and the side wall of the column with a cut weld or a fillet weld;

6) Bolt holes are reserved on the lower flange of the steel beam 2, the diameter of which is slightly larger than the diameter of the high-strength bolt 6, and the reserved holes must correspond to the upper holes of the lower through partition 3;

7) Groove in the middle of the lower flange of steel beam 2, and the depth of the groove must match the position of the bolt hole and the depth of the insertion connecting plate.

8) Carry out cutting and slotting on the upper flange of the steel beam 2 to the upper flange, and the length of cutting and slotting is matched with the extension length of the partition plate 3 above;

Insert the steel beam 2 into the connecting plate 5 so that the upper flange of the steel beam 2 is aligned with the upper through partition 3, the lower flange is located under the lower through partition 4, and the web of the steel beam 2 and the connecting plate 5 are connected with high-strength bolts 6 connection, the lower flange of the steel beam 2 is connected with the lower through-wall partition 4 with high-strength bolts 6, and the upper flange of the steel beam 2 is aligned with the upper through-wall partition 3, and connected by a split weld.

Claims (3)

1. A rectangular steel tube concrete column-steel beam connection node, comprising an upper through partition (3), a lower through partition (4), a connecting plate (5), and a high-strength bolt (6), characterized in that the upper through partition The slab (3) and the lower through partition (4) run through the wall of the rectangular concrete-filled steel tube column (1), and are connected with the surrounding walls of the column with cut-out welds, and the connecting plate (5) is connected to the rectangular Between the side wall and the web of the steel beam (2), it is characterized in that the lower through-wall (4) is connected to the lower flange of the steel beam (2) through high-strength bolts (6), and the upper through-wall (3) is passed through the section The mouth weld connects to the upper flange of the steel beam (2). 2. A construction method of the connecting node according to claim 1, comprising: 1) According to the size of the rectangular concrete-filled steel tube column (1), process the upper through-through partition (3) and the lower through-through partition (4), on the side of the column without beam connection, and then pass through a quarter arc to make the transition between the partitions to the same width as the steel beam; 2) The upper through partition (3) transitions to the same width as the steel beam through a circular arc and stretches outward; 3) Bolt holes are reserved on the lower through partition (4), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the number of reserved holes is calculated by the bending moment borne by the beam flange; 4) Connect the upper through partition (3) and the lower through partition (4) with the column wall of the rectangular steel tube concrete column (1) through the cut-out weld; 5) Process the connection plate (5) according to the distance between the upper through partition (3) and the lower through partition (4), and the connection plate (5) is connected with the side wall of the column with a cut weld or a fillet weld; 6) Bolt holes are reserved on the lower flange of the steel beam (2), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the reserved holes must correspond to the upper holes of the lower through partition (3); 7) Cutting and grooving on the upper flange of the steel beam (2), the cutting and grooving lengths are matched with the extension length of the through partition (3); 8) Insert the steel beam (2) into the connecting plate (5), so that the upper flange of the steel beam (2) is aligned with the upper through partition (3), and the lower flange is located on the lower through partition (4). The web of the beam (2) and the connecting plate (5) are connected by high-strength bolts (6), the lower flange of the steel beam (2) and the lower through-wall partition (4) are connected by high-strength bolts (6), and the steel beam (2) ) is aligned with the upper through partition (3) and connected by split welds. 3. A construction method of the connecting node according to claim 1, comprising: 1) According to the size of the rectangular concrete-filled steel tube column (1), process the upper through partition (3) and the lower through partition (4). Transition to the same width as the steel beam; 2) The upper through partition (3) transitions to the same width as the steel beam through a circular arc and stretches outward; 3) Bolt holes are reserved on the lower through partition (4), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the number of reserved holes is calculated by the bending moment borne by the beam flange; 4) Connect the upper through partition (3) and the lower through partition (4) with the column wall of the rectangular steel tube concrete column (1) through the cut-out weld; 5) Process the connection plate (5) according to the distance between the upper through partition (3) and the lower through partition (4), and the connection plate (5) is connected with the side wall of the column with a cut weld or a fillet weld; 6) Bolt holes are reserved on the lower flange of the steel beam (2), the diameter of which is slightly larger than the diameter of the high-strength bolt (6), and the reserved holes must correspond to the upper holes of the lower through partition (3); 7) Cutting and grooving on the upper flange of the steel beam (2), the cutting and grooving lengths are matched with the extension length of the through partition (3); 8) Insert the steel beam (2) into the connecting plate (5), so that the upper flange of the steel beam (2) is aligned with the upper through partition (3), and the lower flange is located on the lower through partition (4). The web of the beam (2) and the connecting plate (5) are connected by high-strength bolts (6), the lower flange of the steel beam (2) and the lower through-wall partition (4) are connected by high-strength bolts (6), and the steel beam (2) ) is aligned with the upper through partition (3) and connected by split welds.

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