Portal rigid frame structure reinforcing device

Abstract

The utility model discloses a portal rigid frame structure reinforcing device which comprises a horizontally-arranged pull rod, the two ends of the pull rod are connected with end connecting devices at the bottoms of oblique steel beams on the corresponding sides respectively, and each end connecting device comprises a first connecting piece and a second connecting piece which are arranged in parallel and fixed to the bottom of the corresponding steel beam. A connecting sleeve is fixed between the first connecting piece and the second connecting piece, the inner end of the connecting sleeve is flush with the corresponding ends of the first connecting piece and the second connecting piece, an end sealing plate is fixed to the outer end of the connecting sleeve, and the end of the pull rod penetrates through the end sealing plate and then is connected with a nut. A plurality of hanging pieces are vertically fixed on the bottom surface of the lower flange of the steel beam; and a U-shaped supporting buckle for supporting the pull rod is arranged at the bottom of the hanging piece. According to the rigid frame structure, the bearing capacity of the rigid frame structure can be improved, and meanwhile the detachable assembling function of the rigid frame structure is reserved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure reinforcement, in particular to a door-type rigid frame structure reinforcement device. Background Art

[0002] The portal frame structure consists of H-shaped steel beams and H-shaped steel columns. After completion and commissioning, the insulation performance standards for the roof and walls increased, leading to an increase in the dead load of the insulation material. This, in turn, required the originally designed portal frame structure to withstand even higher dead loads. To ensure the safety of the structure and maintain its normal function, a convenient and cost-effective technical approach was required to improve its load-bearing capacity and ensure it could continue to meet the functional requirements of the building.

[0003] Existing technology increases the cross-sectional height of components by adding a T-section directly below the H-section of the original structure or on the inside of the H-section steel column, thereby improving the load-bearing capacity of the steel beams and columns in the portal frame structure. The T-section added in this way must be welded to the original structure using a continuous double-sided fillet weld. However, welding steel components that are already under stress not only causes local stress concentration at the welds of the steel beams and columns, reducing the structural plasticity and posing safety hazards, but also loses the original assembly characteristics that facilitate disassembly due to the fixing effect of the welding, making it difficult to disassemble in the future. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a portal frame structure reinforcement device to solve the problem in the prior art that when the steel structure is reinforced by increasing the cross-sectional area of ​​the original structure by welding a T-shaped section, the structural plasticity is reduced and the assembly function is lost.

[0005] The technical solution of this utility model is as follows:

[0006] A portal frame structure reinforcement device includes a horizontally arranged pull rod, and the two ends of the pull rod are respectively connected to the end connection devices at the bottom of the corresponding side oblique steel beam. The end connection device includes a first connecting member and a second connecting member arranged in parallel and fixed to the bottom of the steel beam. A connecting sleeve is fixed between the first connecting member and the second connecting member, and a head plate is fixed to the outer end of the connecting sleeve. The end of the pull rod passes through the connecting sleeve and the head plate and is connected to a nut; a plurality of hanging parts are vertically fixed to the bottom surface of the lower flange of the steel beam; and a U-shaped support buckle is provided at the bottom of the hanging part for lifting the pull rod.

[0007] Furthermore, the locations where the first connecting member and the second connecting member are welded to the bottom surface of the steel beam are both provided with bending portions for increasing the welding area.

[0008] Furthermore, the sling also includes an auxiliary sling and a connecting plate. The upper end of the auxiliary sling is fixedly connected to the bottom surface of the steel beam, and the lower end is fixed to the connecting plate. The U-shaped support is installed on the connecting plate, and the pull rod passes through the through hole between the U-shaped support and the connecting plate.

[0009] Furthermore, both ends of the U-shaped support buckle are provided with threaded connection ends, and the connecting plate is provided with a through hole for the threaded connection ends of the U-shaped support buckle to pass through. After passing through the through hole, the two threaded connection ends are connected to nuts.

[0010] Compared with the prior art, the present invention has the following positive effects:

[0011] (1) The rigid frame structure is reinforced by setting a tie rod between the bottoms of two opposite steel beams of the original structure and multiple hanging parts vertically set between the steel beams and the tie rods. Only local welding is required at the bottom of the steel beams at the secondary load-bearing position in the original structure. While improving the bearing capacity of the portal frame structure, the adverse effects on the plasticity of the original structure are reduced, and the assembly capability of the original structure for easy disassembly and assembly is retained.

[0012] (2) The implementation of this utility model only requires simple processing and production of common building materials such as round steel bars, steel pipes and steel plates, and is easy to install with low overall cost.

[0013] (3) The utility model also has the advantage of strong universality and is applicable to portal frame light steel industrial buildings with an external enclosure constant load increase of no more than 30%.

[0014] (4) During construction, the device of the utility model only affects the upper space clearance of the original structure, and the installation is quick and convenient, and has no impact on the production operations inside the building that needs to be modified.

[0015] (5) Based on the force transmission characteristics of the portal frame, the device effectively transmits dead loads and live loads to the steel columns through the inclined steel beams. By setting tensioned round steel rods to offset the internal forces of the steel columns, the bearing capacity of the steel columns is indirectly improved. This design reduces the deflection of the inclined steel beams, improves the bearing capacity of the entire structure by comprehensively applying mechanical principles, and significantly enhances the stability and durability of the portal frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A local enlarged view of node A in the middle;

[0018] Figure 3 for Figure 1 Sectional view 1-1;

[0019] Figure 4 for Figure 2 Sectional view 2-2;

[0020] Figure 5 for Figure 3 Sectional view 3-3.

[0021] In the figure: 1. Steel column; 2. Steel beam; 2-1. Lower flange; 3. Pull rod; 4. Hanging piece; 4-1. Auxiliary hanger; 4-2. U-shaped support; 4-3. Connecting plate; 5. End connecting device; 5-1. First connecting piece; 5-2. Second connecting piece; 5-3. Connecting sleeve; 5-4. Head plate. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] like Figure 1 A portal frame structure reinforcement device includes a pull rod 3 horizontally arranged at the bottom of a steel beam 2 and a plurality of hanging parts 4 vertically fixed to the bottom surface of the lower flange 2-1 of the steel beam 2. The number of the hanging parts 4 is determined according to the span of the steel frame.

[0024] Specifically, if Figure 2 The two ends of the tie rod 3 along the length direction are respectively mounted on the end connection device 5 fixed to the bottom of the corresponding side oblique steel beam 2. The end connection device 5 includes a first connection member 5-1 and a second connection member 5-2 arranged in parallel and fixed to the bottom of the steel beam 2. One side of the first connection member 5-1 and the second connection member 5-2 is provided with a bending portion for increasing the welding area. Figure 4 A connecting sleeve 5-3 is fixed between the first and second connecting members 5-1, 5-2. The inner end of the connecting sleeve 5-3 is flush with the corresponding ends of the first and second connecting members 5-1, 5-2. A head plate 5-4 is fixed to the outer end of the connecting sleeve 5-3. The head plate 5-4 is a square, thickened steel plate with a side length equal to the diameter of the connecting sleeve 5-3. It has a through hole. The end of the pull rod 3 passes through the through holes of the connecting sleeve 5-3 and the head plate 5-4 and is connected to two nuts.

[0025] like Figure 3 The suspending member 4 includes an auxiliary suspending rod 4-1 and a connecting plate 4-3. The upper end of the auxiliary suspending rod 4-1 is fixed to the bottom surface of the lower flange 2-1 of the steel beam 2, and the lower end is fixed to the connecting plate 4-3. The U-shaped support buckle 4-2 is installed on the connecting plate 4-3, and the pull rod 3 passes through the through hole between the U-shaped support buckle 4-2 and the connecting plate 4-3.

[0026] Specifically, the U-shaped support buckle 4-2 is made of round steel bars, and both ends of the U-shaped support buckle 4-2 are provided with threaded connection ends for connecting nuts. Figure 5The connecting plate 4-3 is a rectangular steel plate with through holes for the two threaded connection ends of the U-shaped buckle 4-2 to pass through. The threaded connection ends pass through the corresponding through holes and are connected to the two nuts.

[0027] Assembly and construction method of this device:

[0028] First, round steel bars are cut in a workshop and processed into tie rods 3 , and fastening threads for connecting with nuts are engraved on both ends of the round steel bar tie rods 3 .

[0029] Next, cut the first connector 5-1, second connector 5-2, connecting sleeve 5-3, and head plate 5-4. Bend the ends of the first connector 5-1 and second connector 5-2 to ensure that when the main body is horizontal, the bent portion is aligned with the bottom surface of the lower flange 2-1 of the steel beam 2. Drill through holes in the head plate 5-4, weld the head plate 5-4 to the connecting sleeve 5-3, and then weld the first connector 5-1 and second connector 5-2 to the upper and lower sides of the connecting sleeve 5-3.

[0030] Prepare the auxiliary suspender rod 4-1, U-shaped bracket 4-2, and connecting plate 4-3 required for the suspending member 4 in the workshop. The U-shaped bracket 4-2 is made of round steel bars and has threads at both ends. Holes are provided along the length of the connecting plate 4-3 for the two threaded ends of the U-shaped bracket 4-2 to pass through. The lower end of the auxiliary suspender rod 4-1 is welded to the connecting plate 4-3.

[0031] At the construction site, first weld the upper end of the auxiliary suspender 4-1 and the end connector 5 to the corresponding position on the underside of the lower flange 2-1 of the steel beam 2. Then, pass both ends of the tie rod 3 through the end connector 5. The two threaded ends of the U-shaped bracket 4-2 are then threaded through the through-holes in the connecting plate 4-3 and connected to the two nuts. Then, supported by the suspender 4, pre-tighten the nuts on the inner ends of the tie rod 3 to tension the tie rod 3. Then, connect the outer nuts to the ends of the tie rod 3 and apply sufficient pre-tightening force with a wrench. After tightening the two nuts, the axial force generated between the nuts increases the friction between the nut threads and the bolt threads, preventing the two nuts from loosening.

[0032] This device offsets the internal forces transmitted from the outer enclosure's dead load to the steel columns 1 by placing tensioned round steel tie rods 3 at the bottom of the steel beam 2, thereby improving the overall load-bearing capacity. Furthermore, this device only requires localized welding at the bottom of the steel beam 2, eliminating stress concentration. To dismantle the frame, all U-shaped brackets 4-2 and the nuts at each end of the tie rods 3 can be removed, and then the tie rods 3 can be removed without affecting the disassembly of the frame itself.

[0033] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A portal frame structure reinforcement device, characterized by: The invention comprises a horizontally arranged pull rod (3), wherein both ends of the pull rod (3) are respectively connected to an end connection device (5) at the bottom of a corresponding side oblique steel beam (2), and the end connection device (5) comprises a first connection member (5-1) and a second connection member (5-2) arranged in parallel and fixed to the bottom of the steel beam (2), a connecting sleeve (5-3) is fixed between the first connection member (5-1) and the second connection member (5-2), a head plate (5-4) is fixed to the outer end of the connecting sleeve (5-3), and the end of the pull rod (3) passes through the connecting sleeve (5-3) and the head plate (5-4) and is connected to a nut; a plurality of hanging members (4) are vertically fixed to the bottom surface of the lower flange (2-1) of the steel beam (2); and a U-shaped support buckle (4-2) for lifting the pull rod (3) is provided at the bottom of the hanging member (4).

2. The portal frame structure reinforcement device according to claim 1, characterized in that: The locations where the first connecting member (5-1) and the second connecting member (5-2) are welded to the bottom surface of the steel beam (2) are both provided with bending portions for increasing the welding area.

3. The portal frame structure reinforcement device according to claim 1, characterized in that: The suspending member (4) further comprises an auxiliary suspending rod (4-1) and a connecting plate (4-3), wherein the upper end of the auxiliary suspending rod (4-1) is fixedly connected to the bottom surface of the steel beam (2), and the lower end is fixed to the connecting plate (4-3), the U-shaped support buckle (4-2) is mounted on the connecting plate (4-3), and the pull rod (3) passes through a through hole between the U-shaped support buckle (4-2) and the connecting plate (4-3).

4. The portal frame structure reinforcement device according to claim 3, characterized in that: Both ends of the U-shaped support buckle (4-2) are provided with threaded connection ends, and the connecting plate (4-3) is provided with a through hole for the threaded connection end of the U-shaped support buckle (4-2) to pass through, and the two threaded connection ends are connected to nuts after passing through the through holes.

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