Cold bending batten plate self-resetting lattice type steel column

Abstract

The utility model discloses a cold-bending batten plate self-resetting lattice type steel column which comprises four pieces of angle steel, an annular component and two prestressed steel strands, and the four pieces of angle steel are respectively arranged at four corners of a square and are arranged in parallel. The multiple annular components are arranged outside the four steel angles in a sleeving mode and fixedly welded to the outer walls of the steel angles. Stiffening ribs are arranged on the four inner side walls of each annular component, the two prestressed steel strands are arranged on the inner sides of all the annular components in a double-helix mode, one ends of the prestressed steel strands are connected with the two opposite stiffening ribs on the inner side of the last secondary annular component, and the other ends of the prestressed steel strands are connected with the two opposite stiffening ribs on the inner side of the first secondary annular component. According to the utility model, the overall rigidity is obviously improved, the capability of resisting lateral acting force is good, the material consumption and the cost are reduced, the two prestressed steel strands can reduce residual deformation after the action of accidental loads (such as impact and earthquake), self-resetting can be realized after the earthquake, and the repair is convenient.

Description

Technical Field

[0001] This utility model relates to the field of steel structure building technology, specifically to a cold-formed lacing plate self-resetting lattice steel column. Background Technology

[0002] Existing researchers have proposed reinforcement schemes for lattice steel columns using internal spiral stirrups, steel pipes, and PVC pipes, but these are all aimed at steel truss-concrete components. Current lattice steel columns generally improve their stiffness by increasing the size of the steel beams and the thickness of the connecting plates. Lattice steel columns are composed of four angle steel beams connected by four sets of connecting plates, resulting in a large column cross-section and a large amount of steel used. The connecting plates are only connected by angle steel beams, leading to insufficient overall stiffness, especially poor resistance to lateral forces. They also lack self-centering capabilities, particularly during earthquakes, failing to absorb energy and exhibiting limited seismic resistance. Furthermore, they are difficult to repair after an earthquake. Therefore, existing technologies require further improvement and enhancement. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cold-formed lacquered self-resetting lattice steel column, which solves the problems of insufficient overall stiffness performance of existing lattice steel columns, especially poor ability to resist lateral forces, lack of self-resetting function, lack of energy dissipation function when subjected to earthquake, limited seismic resistance, and difficulty in repair after earthquake.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A cold-formed lacing self-resetting lattice steel column includes angle steel, ring members and two prestressed steel strands. There are four angle steels, which are respectively set at the four corners of a square and arranged in parallel. There are multiple ring members, which are square ring structures that match the arrangement of the four angle steels.

[0006] All annular components are fitted over the four angle steels and arranged at equal intervals along the length of the angle steels. The outer side wall of each angle steel is fixedly welded to the corresponding corner of each annular component.

[0007] Each of the four inner sidewalls of the ring component is provided with a stiffening rib. Each stiffening rib is perpendicular to the corresponding sidewall of the ring component, with one end fixedly connected to the middle of the corresponding sidewall and the other end facing the center of the ring component.

[0008] Two prestressed steel strands are arranged in a double helix pattern on the inner side of all ring members. One end of each prestressed steel strand is connected to two stiffening ribs on the inner side of the last ring member, and the other end passes through the stiffening ribs on the inner side of the middle ring members located on its path, and then connects to two stiffening ribs on the inner side of the first ring member.

[0009] Furthermore, the ring-shaped component is an integral structure formed by combining four cold-formed gusset plates. The cold-formed gusset plate is a square frame structure with one corner open, which is formed by bending a strip steel plate at 90° along its length direction at the midpoint and bending both ends inward at 90°.

[0010] Furthermore, the four cold-formed gusset plates are arranged adjacent to each other in a square array, and any two adjacent cold-formed gusset plates are fixedly connected by welding at the middle position of the side wall of the annular member.

[0011] Furthermore, the portions on both sides of the midpoint along the length of the strip steel plate are the first bending portions, and the portions at both ends of the strip steel plate that bend inward are the second bending portions.

[0012] Each of the two second bends has a round hole. Any two adjacent second bends are fitted together and fixed by a bolt assembly to form the stiffening rib. The round holes of the two adjacent second bends are aligned to form the thread hole of the stiffening rib.

[0013] Furthermore, one of the prestressed steel strands uses ordinary steel strand, while the other prestressed steel strand uses shape memory alloy steel strand.

[0014] One end of each of the two prestressed steel strands is threaded through the threading holes of the stiffening ribs on the left and right sides of the last secondary ring member, and each is equipped with a first anchor. The other end of each of the two prestressed steel strands is threaded through the threading holes of the stiffening ribs on the front and rear sides of the first secondary ring member, and each is equipped with a second anchor.

[0015] Furthermore, after tensioning, the two prestressed steel strands are anchored. The prestress value of the ordinary steel strand is less than or equal to 0.1 times its ultimate strength, and the prestress value of the shape memory alloy steel strand is less than or equal to 0.1 times its ultimate strength.

[0016] Furthermore, cold-formed gusseted panels are manufactured by bending using a cold-formation process.

[0017] By adopting the above technical solution, the beneficial technical effects of this utility model are as follows: the overall stiffness of the lattice steel column of this utility model is significantly improved, and its ability to resist lateral forces is good. By setting stiffening ribs, the width and thickness of the gusset plate can be reduced, thereby reducing the amount of material used and the cost. The two prestressed steel strands can reduce the residual deformation after accidental loads (such as impacts and earthquakes), and can achieve self-resetting after the earthquake, which is convenient for repair. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating the structural principle of a cold-formed lacing plate self-resetting lattice steel column according to this utility model.

[0019] Figure 2 This is a top view of a cold-bent lacing plate self-resetting lattice steel column according to this utility model.

[0020] Figure 3 This is a schematic diagram of the steel truss of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the cold-bent lacing plate of this utility model.

[0022] Figure 5 This is the unfolded view of the cold-bent lacing plate of this utility model.

[0023] Figure 6 This is a diagram illustrating the bending process of the cold-bent gusset plate of this utility model. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings:

[0025] Combination Figures 1 to 6 A cold-formed lacing self-resetting lattice steel column includes angle steel 1, ring-shaped members 2 and two prestressed steel strands 3. There are four angle steels 1, which are respectively set at the four corners of a square and arranged in parallel. There are multiple ring-shaped members 2, which are square ring structures that match the arrangement of the four angle steels 1.

[0026] All annular components 2 are fitted over the four angle steels 1 and arranged at equal intervals along the length of the angle steels 1. The outer wall of each angle steel 1 is fixedly welded to the corresponding corner of each annular component 2. During assembly, the four angle steels 1 are first positioned using tooling to ensure they are parallel and spaced at a set interval. The inner walls of the four corners of all annular components 2 are then attached to and fixedly welded to the right-angled outer walls of the angle steels 1 to form a three-dimensional steel truss structure (see...). Figure 3 ).

[0027] Each of the four inner sidewalls of the annular member 2 is provided with a stiffening rib 21. Each stiffening rib 21 is perpendicular to the corresponding sidewall of the annular member 2. One end of each stiffening rib 21 is fixedly connected to the middle of the corresponding sidewall of the annular member 2, and the other end faces the center of the annular member 2, that is, the center line of the steel truss.

[0028] The annular component 2 is an integral structure formed by combining four cold-bent lacing plates 4. Specifically, the four cold-bent lacing plates 4 are arranged adjacent to each other in a square array, and any two adjacent cold-bent lacing plates 4 are fixedly connected by welding at the middle position of the side wall of the annular component 2.

[0029] The cold-formed gusset plate 4 is manufactured by bending using a cold-forming process. The cold-formed gusset plate 4 is a square frame structure with one open corner, formed by bending a strip of steel plate 90° at its midpoint along its length and bending both ends inwards by 90°. Specifically, the portions on either side of the midpoint along the length of the strip of steel plate are the first bending portions 41, and the portions at both ends of the strip of steel plate bent inwards are the second bending portions 42.

[0030] The bend line at the midpoint of the strip steel plate is the first bend line, and the bend lines near its two ends are the second bend lines. The first bend 41 is the portion of the strip steel plate located between its first and second bend lines, and the second bend 42 is the portion of the strip steel plate located between its ends and the second bend line. The two first bends 41 on adjacent sides of the two cold-formed gusset plates 4 form the sidewalls of the ring member 2 and are welded together at adjacent locations. The two second bends 42 on adjacent sides of the two cold-formed gusset plates 4 form the stiffening ribs 21 of the ring member 2 and are fixedly connected by bolt assemblies.

[0031] Each of the two second bends 42 has a circular hole 43. Any two adjacent second bends 42 are fitted together and fixed by bolt assemblies to form the stiffening rib 21. The circular holes 43 of two adjacent second bends 42 are aligned to form the through holes of the stiffening rib 21. The stiffening rib 21 improves the overall strength of the ring member 2, and also improves the steel truss's ability to resist lateral forces, as well as its overall stiffness and stability.

[0032] Two prestressed steel strands 3 are arranged in a double helix manner on the inner side of all ring members 2. One end of each prestressed steel strand 3 is connected to two stiffening ribs 21 on the inner side of the last ring member 2, and the other end passes through the stiffening ribs 21 on the inner side of the middle ring member 2 located on its path, and is connected to the two stiffening ribs 21 on the inner side of the first ring member 2.

[0033] Specifically, one of the prestressed steel strands 3 is made of ordinary steel strand, and the other prestressed steel strand 3 is made of shape memory alloy steel strand. One end of each steel strand is threaded through the through-holes of the stiffening ribs 21 on the left and right sides of the last secondary ring member 2, and is respectively equipped with a first anchor 31, which can be replaced by a lock. The other end of each steel strand is threaded through the through-holes of the stiffening ribs 21 on the front and rear sides of the first secondary ring member 2, and is respectively equipped with a second anchor 32.

[0034] After the steel truss is fabricated, one end of each of the two prestressed steel strands 3 is threaded into the threading hole of the corresponding stiffening rib 21 and fixed with the first anchor 31. The other end of each of the two prestressed steel strands 3 is threaded out of the threading hole of the stiffening rib 21 and fixed with the second anchor 32. After the anchors at the ends of the two prestressed steel strands 3 are installed, the two steel strands are tensioned and anchored. The prestress value of ordinary steel strands is equal to 0.1 times their ultimate strength, and the prestress value of shape memory alloy steel strands is also equal to 0.1 times their ultimate strength. The installation process is then complete.

[0035] The parts not mentioned in this utility model can be achieved by adopting or referencing existing technologies.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A cold-formed lacing plate self-resetting lattice steel column, characterized in that, It includes angle steel, ring-shaped components and two prestressed steel strands. There are four angle steels, which are respectively set at the four corners of a square and arranged in parallel. There are multiple ring-shaped components, which are square ring structures that match the arrangement of the four angle steels. All annular components are fitted over the four angle steels and arranged at equal intervals along the length of the angle steels. The outer side wall of each angle steel is fixedly welded to the corresponding corner of each annular component. Each of the four inner sidewalls of the ring component is provided with a stiffening rib. Each stiffening rib is perpendicular to the corresponding sidewall of the ring component, with one end fixedly connected to the middle of the corresponding sidewall and the other end facing the center of the ring component. Two prestressed steel strands are arranged in a double helix pattern on the inner side of all ring members. One end of each prestressed steel strand is connected to two stiffening ribs on the inner side of the last ring member, and the other end passes through the stiffening ribs on the inner side of the middle ring members located on its path, and then connects to two stiffening ribs on the inner side of the first ring member.

2. The self-resetting lattice steel column with cold-formed gusseted plates according to claim 1, characterized in that, The ring-shaped component is an integral structure formed by combining four cold-formed gusset plates. The cold-formed gusset plate is a square frame structure with one corner open. It is formed by bending a strip steel plate 90° at the midpoint along its length and bending both ends inward by 90°.

3. A cold-formed lacing plate self-resetting lattice steel column according to claim 2, characterized in that, Four cold-formed gusset plates are arranged adjacent to each other in a square array, and any two adjacent cold-formed gusset plates are fixedly connected by welding at the middle position of the side wall of the ring-shaped component.

4. A cold-formed lacing plate self-resetting lattice steel column according to claim 3, characterized in that, The portions on both sides of the midpoint along the length of the strip steel plate are the first bending portions, and the portions at both ends of the strip steel plate that bend inward are the second bending portions. Each of the two second bends has a round hole. Any two adjacent second bends are fitted together and fixed by a bolt assembly to form the stiffening rib. The round holes of the two adjacent second bends are aligned to form the thread hole of the stiffening rib.

5. A cold-formed lacing self-resetting lattice steel column according to claim 1, characterized in that, One of the prestressed steel strands uses ordinary steel strand, while the other prestressed steel strand uses shape memory alloy steel strand; One end of each of the two prestressed steel strands is threaded through the threading holes of the stiffening ribs on the left and right sides of the last secondary ring member, and each is equipped with a first anchor. The other end of each of the two prestressed steel strands is threaded through the threading holes of the stiffening ribs on the front and rear sides of the first secondary ring member, and each is equipped with a second anchor.

6. A cold-formed lacing self-resetting lattice steel column according to claim 5, characterized in that, After tensioning, the two prestressed steel strands are anchored. The prestress value of ordinary steel strands is less than or equal to 0.1 times its ultimate strength, and the prestress value of shape memory alloy steel strands is less than or equal to 0.1 times its ultimate strength.

7. A cold-formed lacing self-resetting lattice steel column according to claim 1, characterized in that, Cold-formed gusseted plates are manufactured by bending using a cold-formation process.

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