A lattice-type reinforced concrete column and its connection structure with beams

Abstract

This invention relates to a lattice-type reinforced concrete column and its connection structure with beams, belonging to the field of architectural engineering. The invention comprises a steel frame and a concrete body. The steel frame includes four angle steel column legs and connecting strips or plates. The apexes of the four angle steel column legs face inward and are orthogonally arranged. The connecting strips or plates are fixedly connected between adjacent angle steel column legs. The concrete column body includes longitudinal reinforcement, stirrups, and concrete. The concrete is poured between the longitudinal reinforcement, stirrups, and steel frame. This invention can not only be adapted for connection with orthogonal beams but also for secure connection with oblique beams, overcoming the problems of insufficient anchorage and construction difficulties caused by the conflict of reinforcing bars in existing steel-reinforced concrete columns and reinforced concrete beams. Furthermore, the steel frame designed in this invention is not only suitable for steel-reinforced concrete columns with square cross-sections but also has versatility for concrete columns with other shapes such as circular and elliptical cross-sections.

Description

Technical Field

[0001] This invention belongs to the field of architectural engineering, specifically, it relates to a lattice-type reinforced concrete column and its connection structure with beams. Background Technology

[0002] Currently, most steel-reinforced concrete columns use solid-web steel frames with cross-sections typically in the shape of a cross or I. The connected beams usually require internal steel frames, which are then welded to the column steel, resulting in excessive steel consumption in the beams. When ordinary reinforced concrete beams are used as the connecting beams to the column steel, it is necessary to weld gusset plates or steel sleeves onto the steel frame of the concrete column, or to create openings in the web. These methods, where the gusset plates and beams share space, can lead to difficulties in concrete pouring and insufficient compaction, especially when the beam has a large number of reinforcing bars. This can also cause beam reinforcement to intersect with column reinforcement in various directions, affecting structural quality. This is particularly true for beams under heavy loads, where the number of reinforcing bars is even greater, making construction more difficult. Creating openings in the web not only increases the number of steps but also makes it difficult to guarantee construction quality. Furthermore, allowing beam reinforcement to pass through while creating too many openings in the web can significantly weaken the steel frame cross-section, leading to a substantial reduction in load-bearing capacity. Excessive welding of steel sleeves can also significantly increase residual stress in the steel frame. All of these factors contribute to extremely complex internal forces within the steel frame, posing significant safety hazards. In addition, conventional steel columns are generally only suitable for square columns and can only be orthogonal to beams. For skew beams, since the beam reinforcement is oblique to the steel in the concrete column, and the web and flange of the steel frame are connected to the beam reinforcement, the anchoring points of the reinforcement are complicated, and the anchorage is insufficient and construction is difficult.

[0003] Furthermore, some lattice-type steel-framed columns have square cross-sections, which are only suitable for square-section columns and not for round-section columns, resulting in poor versatility. In addition, conventional steel-frame cross-sections lack bonding measures with concrete, leading to difficulties in concrete pouring, too many hidden areas, difficulty in vibration, and frequent formation of voids. At the same time, the steel frames are concentrated in the middle of the column, resulting in strong load-bearing capacity at the center and weak load-bearing capacity around the perimeter, leading to uneven stress distribution. Summary of the Invention

[0004] To overcome the problems existing in the background art, this invention provides a lattice-type reinforced concrete column and its connection structure with beams. The designed lattice-type reinforced concrete column can be firmly connected not only to orthogonal beams but also to skew beams, overcoming the problems of insufficient anchorage and construction difficulties caused by the lack of sufficient anchoring points between existing steel-reinforced concrete columns and skew beams. Furthermore, the steel frame designed in this invention is not only suitable for steel-reinforced concrete columns with square cross-sections but also has versatility for concrete columns with other cross-sections such as circles and ellipses.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: The lattice-type reinforced concrete column includes a steel frame and a reinforced concrete column body; the steel frame includes four angle steel column legs and tie bars or plates; the apex angles of the four angle steel column legs face inward and are orthogonally arranged, and the tie bars or plates are fixedly connected between two adjacent angle steel column legs; the concrete column body includes longitudinal reinforcement, stirrups, and concrete; the longitudinal reinforcement is arranged around the four angle steel column legs, and the stirrups surround the longitudinal reinforcement and tie the opposite longitudinal reinforcement to form composite stirrups; the longitudinal reinforcement, stirrups, and steel frame form a concrete casting skeleton.

[0006] Preferably, two adjacent angle steel columns are connected by a splicing member; the splicing member includes two splicing lugs and a connecting plate; the two splicing lugs are respectively fixed to the opposite ends of the two adjacent angle steel columns, and the connecting plate is connected between the two splicing lugs.

[0007] Preferably, the connecting plate is connected to the connecting lug bolt.

[0008] Preferably, the lattice-type reinforced concrete column further includes a column base plate and column base anchor bolts; the column base plate is welded to the bottom end of the four angle steel column legs, and stiffening ribs are welded between the column base plate and the angle steel column legs; the column base plate is anchored to the foundation by column base anchor bolts.

[0009] Preferably, the outer sides of the two wings of the angle steel column are provided with studs; the length of the studs is not less than 100mm, and the vertical spacing between the studs does not exceed 250mm.

[0010] Preferably, the lacing strip is made of angle steel with a side length of not less than 50mm, and the lacing plate is made of steel plate with a width of not less than 50mm. The lacing strip or lacing plate is welded obliquely between two adjacent angle steel column legs.

[0011] Preferably, the edge of the angle steel column is at least 150mm away from the edge of the concrete.

[0012] The lattice-type reinforced concrete column and beam connection structure is described above, wherein the concrete column and beam are orthogonal or oblique.

[0013] As a preferred option, the longitudinal and transverse reinforcement bars of the beam pass through the gap between the four angle steel column members and are arbitrarily welded to the four angle steel column members, the longitudinal reinforcement bars, the transverse reinforcement bars, and the outer stirrups of the column.

[0014] The beneficial effects of this invention are: This invention universally uses four angle steel column legs with their apexes facing inward and arranged orthogonally as the main steel skeleton of a reinforced concrete column. Because there is sufficient gap between the four angle steel column legs, the reinforcing bars can be avoided. When the column is connected to the reinforced concrete beam, there is no need to weld node plates or reinforcing bar sleeves to the steel skeleton or open holes in the web. The connection between the column and the beam can be achieved, which solves the problems of difficult pouring and incomplete vibration caused by the large number of reinforcing bars at the beam-column connection node in the existing structure. At the same time, the structural design of the four angle steel column legs of this invention does not affect the setting of the column longitudinal reinforcement and column stirrups, which is beneficial to the pouring of concrete and the uniform distribution of internal forces, and the steel skeleton is well embedded in the concrete.

[0015] The steel-reinforced concrete column of the present invention can not only be connected to orthogonal beams, but also be firmly connected to skew beams, overcoming the problems of insufficient anchorage and construction difficulties caused by the lack of sufficient anchoring points between existing steel-reinforced concrete columns and skew beams.

[0016] The steel frame of this invention is not only suitable for steel-reinforced concrete columns with square cross sections, but also applicable to concrete columns with other cross sections such as circular and elliptical.

[0017] The angle steel column of the present invention is easy to process in the factory, and can be disassembled into small components for on-site assembly. It is flexible to transport, has wide adaptability, reduces transportation costs, and is easy to hoist. Attached Figure Description

[0018] Figure 1 This is a top view of the connection relationship between the angle steel column and the lacing strip or lacing plate of the present invention; Figure 2 This is a side view of the steel frame structure of the present invention. Figure 3 This is a side view of the connection relationship between the angle steel column and the splicing component of the present invention; Figure 4 This is a top view of the connection relationship between the angle steel column and the splicing component of the present invention; Figure 5 This is a partially enlarged view of the connection relationship between the angle steel column and the splicing component of the present invention; Figure 6 This is a top view of the connection relationship between the angle steel column and the column base plate of the present invention; Figure 7 This is a schematic diagram showing the connection relationship between the present invention and the reinforced concrete beam; Figure 8 yes Figure 7 View 1-1; In the diagram, 1-angle steel column leg, 2-lacing strip or lacing plate, 3-splicing lug, 4-connecting plate, 5-bolt, 6-column base steel plate, 7-column base anchor bolt, 8-stiffening rib, 9-stud, 10-column longitudinal reinforcement, 11-reinforced concrete beam, 12-concrete, 13-foundation, 14-beam longitudinal reinforcement, 15-beam transverse reinforcement, 16-grouting vent hole, 17-column outer perimeter stirrup. Detailed Implementation

[0019] To make the objectives, technical solutions, and beneficial effects of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so as to facilitate understanding by those skilled in the art.

[0020] In the description of this invention, unless otherwise stated, the terms "inner", "outer", etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances. Example 1

[0022] like Figures 1-6 As shown, the lattice-type reinforced concrete column includes a steel frame, a base plate 6, column base anchors 7, and a concrete column body.

[0023] The steel frame consists of four angle steel column members 1 and tie bars or plates 2. The angle steel column members 1 are welded from steel plates with a thickness of 30mm-60mm into an angle steel shape. The apex angles of the four angle steel column members 1 face inward and are orthogonally arranged. The spacing between the four angle steel column members 1 is determined according to the cross-section of the concrete column body. Generally, the edge of the angle steel column member is not less than 150mm from the edge of the concrete column. Foot plates 6 are welded to the bottom ends of the four angle steel column members 1 and anchored to the foundation 13 using column foot anchors 7. Stiffening ribs 8 are welded between the column foot plates 6 and the angle steel column members 1 to strengthen the connection between them. Tie bars or plates 2 are welded between two adjacent angle steel column members 1. The connecting strips or plates 2 serve to connect the angle steel column legs 1, forming a lattice structure that can be hoisted as a whole. The connecting strips are made of angle steel with a side length of not less than 50mm, and the connecting plates are made of steel plates with a width of not less than 50mm. The connecting strips or plates are at approximately 45° to the angle steel column legs 1, and the distance between the end edges of two adjacent connecting strips or plates is not less than 0.2m. The connecting strips are generally made of angle steel. When connecting strips are used, the side length of the angle steel connecting strip is not less than 1 / 8 to 1 / 6 of the maximum side length of the angle steel column leg 1, and the wall thickness of the connecting strip is 1 / 4 to 1 / 5 of the wall thickness of the angle steel column leg 1. The connecting plates are generally made of steel plates. When connecting plates are used, the width of the connecting plate is 1 / 6 to 1 / 4 of the maximum side length of the angle steel column leg 1, and the thickness of the connecting plate is 1 / 3 to 1 / 4 of the wall thickness of the angle steel column leg 1.

[0024] Two adjacent angle steel column members 1 are connected by a splicing component, which includes two splicing lugs 3 and a connecting plate 4. The two splicing lugs 3 are respectively fixed to the opposite ends of the two adjacent angle steel column members 1. Bolt holes are provided on the splicing lugs 3 and the connecting plate 4, and the connecting plate 4 connects the two splicing lugs 3 by bolts 5. A set of splicing components is provided on the outer end face of each of the two wings of the angle steel column member 1, as shown in the attached figure. Figure 4 This invention can be constructed using a modular construction method: the angle steel column limb 1 can be fabricated in the factory first, and then the angle steel column limb 1 can be welded to the column base steel plate 6, the lacing strip or lacing plate 2 can be welded to the angle steel column limb 1, and the angle steel column limb 1 can be connected with each other through splicing parts on the construction site. This makes it easier to transport, reduces transportation costs, facilitates hoisting, and has wide adaptability.

[0025] The outer surfaces of the two wings of the angle steel column 1 are provided with studs 9, each stud 9 being at least 100mm long and spaced no more than 250mm apart. The studs 9 increase the bond strength between the angle steel column 1 and the concrete.

[0026] The concrete column body includes longitudinal reinforcement 10, stirrups, and concrete 12. The longitudinal reinforcement (10) is arranged around the four angle steel column legs (1). The stirrups surround the longitudinal reinforcement and tie the opposite longitudinal reinforcement to form composite stirrups. The outer stirrups 17 are arranged around the outer perimeter of the four angle steel column legs 1. The concrete 12 is poured between the longitudinal reinforcement 10, the stirrups, and the four angle steel column legs 1. This invention uses four angle steel column legs 1 with their apex angles facing inward and arranged orthogonally as the main steel skeleton of the reinforced concrete column. Since there is sufficient gap between the four angle steel column legs 1, the reinforcing bars can be avoided. The longitudinal reinforcement 10 and the stirrups are arranged between the gaps of the four angle steel column legs 1, or along the outer perimeter of the four angle steel column legs 1. This invention is applicable not only to square cross-section columns but also to circular cross-section columns, making it highly versatile and more conducive to the pouring of concrete 12. At the same time, the arrangement of the four angle steel column legs 1 also helps to ensure uniform distribution of internal forces in the reinforced concrete column. Meanwhile, because there are sufficient gaps between the four angle steel column legs 1, the laying of reinforcing bars will not be obstructed. When connecting the steel-concrete column to the reinforced concrete beam 11, it is not necessary to weld node plates or reinforcing bar sleeves onto the steel frame or drill holes in the web. This solves the problems of pouring difficulties and inadequate vibration caused by the large number of reinforcing bars at the beam-column connection nodes in existing structures. Furthermore, because the longitudinal reinforcement 14 and transverse reinforcement 15 of the reinforced concrete beam 11 can be effectively connected to the longitudinal reinforcement 10 and stirrups of the column, the structure of this invention can not only be firmly connected to orthogonal beams but also to skew beams. Construction is simple, solving the problems of insufficient anchorage and construction difficulties in existing steel-concrete structures when connected to skew beams. Additionally, the angle steel column legs are evenly distributed in the concrete column, and the column leg cross-section is simple and easy to pour, resulting in uniform stress distribution and easily guaranteed quality. Example 2

[0027] like Figures 1-8 As shown, the lattice-type reinforced concrete column and beam connection structure includes lattice-type reinforced concrete columns as shown in Example 1, and beams that are orthogonal or oblique. The lattice-type reinforced concrete columns can be square or circular.

[0028] This application example uses a circular concrete column as an example to illustrate the connection structure between the lattice-type reinforced concrete column and the beam.

[0029] like Figure 7 and Figure 8As shown, the longitudinal reinforcement 14 and transverse reinforcement 15 of the beam can pass through the gaps between the four angle steel column legs 1, so there is no need to weld node plates or steel sleeves onto the steel frame or open holes in the web. Furthermore, the longitudinal reinforcement 14 and transverse reinforcement 15 of the beam can be welded to the column longitudinal reinforcement 10 and the column perimeter stirrups 17, which increases the firmness of the column-beam connection. Moreover, since the longitudinal reinforcement 14 and transverse reinforcement 15 of the beam can pass through the gaps between the four angle steel column legs 1, it does not affect the position setting of the longitudinal reinforcement 14 and transverse reinforcement 15 of the beam. Whether it is an orthogonal beam or an oblique beam, it can be firmly connected to the reinforced concrete column, which solves the problem of insufficient anchorage and construction difficulties caused by the lack of sufficient anchorage points between the existing steel-reinforced concrete column and the oblique beam.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A lattice-type reinforced concrete column, characterized in that: The column includes a steel frame and a reinforced concrete column body; the steel frame includes four angle steel column legs (1) and tie bars or tie plates (2); the apex angles of the four angle steel column legs (1) are inward and orthogonal, and the tie bars or tie plates (2) are fixedly connected between two adjacent angle steel column legs (1); the concrete column body includes column longitudinal reinforcement (10), column stirrups and concrete (12); the column longitudinal reinforcement (10) is set around the four angle steel column legs (1), and the column stirrups surround the column longitudinal reinforcement (10) and tie the opposite longitudinal reinforcement to form a composite stirrup; the column longitudinal reinforcement (10), column stirrups and steel frame form the casting skeleton of concrete (12); The concrete column is perpendicular or oblique to the beam; the longitudinal reinforcement (14) and transverse reinforcement (15) of the beam pass through the gap between the four angle steel column legs (1) and are arbitrarily welded to the four angle steel column legs (1), the column longitudinal reinforcement (10), the column transverse reinforcement, and the column outer hoop reinforcement (17); The edge of the angle steel column (1) is not less than 150mm from the edge of the concrete (12); The outer sides of the two wings of the angle steel column (1) are provided with studs (9); The length of the stud (9) is not less than 100mm, and the spacing between the studs (9) is not more than 250mm; Two adjacent angle steel column members (1) are connected by a splicing component; the splicing component includes two splicing lugs (3) and a connecting plate (4); the two splicing lugs (3) are respectively fixed at the opposite ends of the two adjacent angle steel column members (1), and the connecting plate (4) is connected between the two splicing lugs (3).

2. A lattice-type reinforced concrete column according to claim 1, characterized in that: The connecting plate (4) is bolted to the connecting lug (3).

3. A lattice-type reinforced concrete column according to claim 1, characterized in that: It also includes column base steel plates (6) and column base anchor bolts (7); the column base steel plates (6) are welded to the bottom of the four angle steel column legs (1), and stiffening ribs (8) are welded between the column base steel plates (6) and the angle steel column legs (1); the column base steel plates (6) are anchored to the foundation (13) by the column base anchor bolts (7).

4. A lattice-type reinforced concrete column according to claim 1, characterized in that: The lacing strip or lacing plate (2) is inclinedly welded between two adjacent angle steel column legs (1); the lacing strip is made of angle steel with a side length of not less than 50mm, and the lacing plate is made of steel plate with a width of not less than 50mm.

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