Structure and method for rapid and precise lifting of limited height internal buckling restrained support members

Abstract

The present invention discloses a structure and method for quickly and accurately lifting a flexure-restrained support member of limited height. The lifting structure includes a center of gravity lifting ring, a left lifting ring and a right lifting ring on the upper beam body, and a center of gravity lifting lug, a left lifting lug and a right lifting lug on the support member, and also includes an adjustable sling. The lifting method utilizes the adjustable sling between the center of gravity lifting ring and the center of gravity lifting lug to lift the support member to the elevation, and utilizes the adjustable sling between the left lifting ring and the left lifting lug and between the right lifting ring and the right lifting lug so that the two ends of the support member correspond to the connection points of the first node plate and the second node plate respectively. The beneficial effects of the present invention are: it can effectively solve the installation problem of BRB support members in a limited space, and because the embedded ring and the lifting lug positions are optimized in the early stage, the effects of accurate positioning and rapid installation can be achieved during the later installation. It improves work efficiency, saves time cost and reduces construction cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of precise hoisting of buckling restrained brace (BRB) support members, and in particular relates to a structure and method for rapid and precise hoisting of buckling restrained brace members within a limited height. Background Art

[0002] Buckling-restrained braces (BRBs) are a new type of lateral-force-resisting and energy-dissipating metal shock-absorbing component that has gained popularity both domestically and internationally over the past decade. Their structure consists of a core unit, a restraining unit, and an unbonded layer between them. Through the isolation provided by the unbonded layer and the ferrule-like action of the restraining unit, the bracing core unit can freely expand and contract axially relative to the restraining unit. It can yield across its entire cross section under tension and compression, and maintains its stability under compression. In recent years, BRBs have been widely used in seismic retrofitting of existing structures and in the seismic design of new structures, both domestically and internationally.

[0003] At present, there are problems in the construction process of buckling-restrained braced structures, such as the difficulty of lifting at limited height, the difficulty of accurately positioning and quickly installing buckling-restrained bracing components and node plates, and the imperfect construction technology and quality standards of buckling restraints. These problems result in low installation efficiency of buckling-restrained braced structures and the inability to guarantee the quality of finished products. Summary of the Invention

[0004] The present invention provides a structure and method for the rapid and precise installation of buckling-restrained brace members within a limited height, addressing the low installation efficiency and poor quality of existing buckling-restrained brace structures. This invention, based on the unique characteristics of BRB support members, develops a precise installation method for BRB support members, achieving significant results in practical construction applications and generating significant social and economic benefits.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A structure for quickly and accurately lifting a support member with internal buckling restraint of limited height, comprising a first node plate and a second node plate on a column and a beam; a center of gravity lifting ring and a left lifting ring and a right lifting ring located on both sides of the center of gravity lifting ring are provided on the upper beam; a center of gravity lifting ear and a left lifting ear and a right lifting ear located on both sides of the center of gravity lifting ear are provided on the support member; the center of gravity lifting ring, the center of gravity lifting ear and the support member are located on the same vertical line; and adjustable lifting devices are provided between the center of gravity lifting ring and the center of gravity lifting ear, between the left lifting ring and the left lifting ear, and between the right lifting ring and the right lifting ear.

[0007] Furthermore, a first node plate is provided at the angle between the column and the beam, and a second node plate is provided at a non-node portion of the beam.

[0008] Furthermore, a first node plate is provided at the angle between the left column and the lower beam, and at the angle between the right column and the lower beam, and a second node plate is provided below the middle of the upper beam.

[0009] Furthermore, the supporting member is an I-shaped section or a box-shaped section.

[0010] Furthermore, the center of gravity lifting ring, the left lifting ring and the right lifting ring are pre-embedded in the beam body.

[0011] Furthermore, the center of gravity lifting ring, the left lifting ring and the right lifting ring are all arranged on the center line of the beam.

[0012] Furthermore, a first back plate is provided on the first node plate, and the first back plate limits the upper end surface of the end portion of the supporting member.

[0013] Furthermore, a second back plate is provided on the second node plate, and the second back plate limits the upper end surface of the end portion of the supporting member.

[0014] Furthermore, the center of gravity lifting eye, the left lifting eye and the right lifting eye are welded to the supporting member.

[0015] Furthermore, the adjustable lifting device is a hand chain hoist.

[0016] A method for quickly and accurately lifting a limited height internal buckling restrained support member includes a first node plate and a second node plate on a column and a beam.

[0017] Step S01, finding the position of the center of gravity corresponding to the upper beam when the support member is installed, installing a center of gravity lifting ring at the position of the beam, and installing a left lifting ring and a right lifting ring on both sides of the center of gravity lifting ring on the beam;

[0018] Step S02, processing the connection between the gusset plate and the supporting member;

[0019] Step S03, installing a center of gravity lifting lug on the upper side corresponding to the center of gravity position of the support member, and installing a left lifting lug and a right lifting lug on both sides of the center of gravity lifting lug on the support member;

[0020] Step S04: transport the support member to the installation location, set adjustable slings between the center of gravity lifting ring and the center of gravity lifting ear, between the left lifting ring and the left lifting ear, and between the right lifting ring and the right lifting ear, use the adjustable slings between the center of gravity lifting ring and the center of gravity lifting ear to lift the support member to the elevation, and use the adjustable slings between the left lifting ring and the left lifting ear, and between the right lifting ring and the right lifting ear, so that the two ends of the support member correspond to the connection points of the first gusset plate and the second gusset plate respectively;

[0021] Step S05 , welding and fixing the ends of the supporting members to the first node plate and the second node plate, and after the welding is completed, removing the adjustable hangers in sequence, and finally cutting off the lifting ears and the lifting rings.

[0022] Furthermore, a first node plate is provided at the angle between the left column and the lower beam, and at the angle between the right column and the lower beam, and a second node plate is provided below the middle of the upper beam.

[0023] Furthermore, in step S02, a first back plate is set on the first node plate, and a second back plate is set on the second node plate. In step S04, the first back plate limits the upper end surface of the end of the supporting member, and the second back plate limits the upper end surface of the end of the supporting member.

[0024] Furthermore, in the step S04, the height and position of the supporting member are monitored based on the structure one-meter line in conjunction with a laser leveler.

[0025] Beneficial effects of the present invention:

[0026] 1. It can effectively solve the installation problem of BRB support components in limited spaces. Because the embedded ring and lug positions are optimized in the early stage, precise positioning and rapid installation can be achieved in the later stage. This improves work efficiency, saves time and reduces construction costs.

[0027] 2. The construction time of the steel back plate is optimized, so that the steel back plate can simultaneously achieve the functions of auxiliary positioning and welding backing, making the lifting positioning more accurate and the fixing simpler and more effective, thereby reducing the requirements for construction workers and saving construction personnel costs.

[0028] 3. The tools used in the method are all common tools in the construction site, and the construction preparation is relatively easy. After the installation is completed, only the lifting lugs and the lifting rings need to be cut off, so the consumables used are relatively few, which not only reduces the material cost but also meets the requirements of environmental protection.

[0029] 4. It is simpler than traditional lifting devices and does not require extra support frames, so it occupies less space and is more conducive to construction in an environment with limited height within a building, so that it has less interference with other types of construction operations and can achieve wider applicability.

[0030] The aforementioned main solution of the present invention and its further options can be freely combined to form multiple solutions, all of which are solutions that can be adopted and protected by the present invention; and the (non-conflicting options) of the present invention can also be freely combined with each other and with other options. After understanding the solutions of the present invention, those skilled in the art will understand that there are many combinations based on existing technology and common knowledge, all of which are technical solutions to be protected by the present invention, and these are not exhaustive here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention.

[0032] Figure 2 It is a structural cross-sectional view of the support member of the present invention.

[0033] Figure 3 It is a pre-buried schematic diagram of the lifting ring of the present invention.

[0034] Figure 4 It is a schematic diagram of welding of the steel back plate of the present invention.

[0035] Figure 5 It is a schematic diagram of welding of the lifting lug of the present invention.

[0036] Figure 6 It is a schematic diagram of the hoisting of the supporting structure of the present invention.

[0037] In the figure: 1-column, 2-beam, 3-first node plate, 4-second node plate, 5-support member, 6-center of gravity lifting ring, 7-left lifting ring, 8-right lifting ring, 9-first back plate, 10-second back plate, 11-center of gravity lifting ear, 12-left lifting ear, 13-right lifting ear, 14-adjustable lifting device. DETAILED DESCRIPTION

[0038] The following non-limiting examples illustrate the present invention.

[0039] Example 1:

[0040] refer to Figures 1 to 6 As shown, a fast and accurate lifting structure for a limited height internal buckling restrained support member includes a column 1, a beam 2, a first node plate 3, a second node plate 4 and a support member 5.

[0041] A first node plate 3 is provided at the angle between the left column 1 and the lower beam 2, and at the angle between the right column 1 and the lower beam 2, and a second node plate 4 is provided below the middle of the upper beam. Then, a supporting member 5 needs to be hoisted between the lower left first node plate 3 and the upper middle second node plate 4, and between the lower right first node plate 3 and the upper middle second node plate 4.

[0042] Support member 5 has an I-shaped or box-shaped cross-section. BRB support members come in two styles: I-beam and box-steel. During installation, the ends of the BRB support member are welded to the completed BRB gusset plates. I-beam BRB support members are factory-welded from 40mm-thick Q335 steel plates. Box-steel BRB support members are factory-welded from 40mm-thick Q335 steel plates. They consist of two connecting stiffeners and two connecting gusset plates. The on-site installation of the BRB support member involves hoisting and positioning the support member, and welding the support member to the gusset plate.

[0043] The upper beam body 2 is provided with a center of gravity lifting ring 6 and a left lifting ring 7 and a right lifting ring 8 located on both sides of the center of gravity lifting ring 6. The center of gravity lifting ring 6, the left lifting ring 7 and the right lifting ring 8 are pre-buried in the beam body 2. The three lifting rings are used to hook the sling to achieve placement above the sling.

[0044] At the same time, the center of gravity lifting ring 6, the left lifting ring 7 and the right lifting ring 8 are all arranged on the center line of the beam, ensuring that the three lifting devices are arranged on the same straight line, which is conducive to the lifting control of the supporting member 5.

[0045] The support member 5 is provided with a center of gravity lifting ear 11 and a left lifting ear 12 and a right lifting ear 13 located on both sides of the center of gravity lifting ear 11. The center of gravity lifting ear 11, the left lifting ear 12 and the right lifting ear 13 are welded to the support member 5. The three lifting ears are used for the hook setting of the sling to realize the lifting effect of the sling on the support member 5.

[0046] The center of gravity of the center of gravity ring 6, the center of gravity lug 11, and the support member 5 are located on the same vertical line. An adjustable sling 14 is installed between the ring and the lug to prevent the support member 5 from shifting. The adjustable sling 14 between the center of gravity ring 6 and the center of gravity lug 11 allows for quick height adjustment of the support member 5. Adjustable slings 14 are also installed between the rings and lugs on both sides to adjust the ends of the support member 5.

[0047] Adjustable slings 14 are provided between the center of gravity lifting ring 6 and the center of gravity lifting ear 11, between the left lifting ring 7 and the left lifting ear 12, and between the right lifting ring 8 and the right lifting ear 13. The adjustable slings 14 are hand-chain hoists. Through three hand-chain hoists, the height, inclination and position of the supporting member 5 can be adjusted to achieve precise alignment between the supporting member and the node plate.

[0048] A first back plate 9 is welded on the first node plate 3, and a second back plate 10 is welded on the second node plate 4. When the support member 5 is hoisted, the first back plate 9 limits the upper end surface of the lower end of the support member 5, and the second back plate 10 limits the upper end surface of the upper end of the support member 5.

[0049] Example 2:

[0050] refer to Figures 1 to 6 As shown, a method for quickly and accurately lifting a limited height internal buckling restrained support member includes a column 1, a beam 2, a first node plate 3, a second node plate 4 and a support member 5.

[0051] A first node plate 3 is provided at the angle between the left column 1 and the lower beam 2, and at the angle between the right column 1 and the lower beam 2, and a second node plate 4 is provided below the middle of the upper beam. Then, a supporting member 5 needs to be hoisted between the lower left first node plate 3 and the upper middle second node plate 4, and between the lower right first node plate 3 and the upper middle second node plate 4.

[0052] The support member 5 has an I-shaped section and a box-shaped section. There are two forms of BRB support members, one is an I-beam style and the other is a box-shaped steel style. During installation, the two ends of the BRB support member are welded and fixed to the completed BRB node plate.

[0053] I-beam BRB supports are factory-welded from 40mm thick Q335 steel plates. Box-section BRB supports are factory-welded from 40mm thick Q335 steel plates, consisting of two connecting stiffeners and two connecting gusset plates. On-site installation of BRB supports involves hoisting and positioning the support members, and welding the support members to the gusset plates.

[0054] Before installing support member 5, use a theodolite and a laser leveler to mark the centerline of the BRB support member installation location using a chalk line, based on the structural axis during construction. Using the structural one-meter line, the BRB support member is precisely installed in the corresponding position. During installation, the BRB support member is welded to the BRB gusset plate at both ends. The installation method for I-beam and box-section steel BRB support members is the same.

[0055] The specific steps are as follows:

[0056] Step S01, during the structural construction phase, accurately find the position of the center of gravity of the support member 5 corresponding to the upper beam body 2 when it is installed according to the drawings, install a center of gravity ring 6 with a diameter of 16 mm at this position of the beam body 2, and embed a left ring 7 and a right ring 8 with a diameter of 16 mm on both sides of the center of gravity ring 6 on the beam body 2 along the center line of the beam. A total of three rings are embedded in the installation of one support member 5.

[0057] Step S02: Process the connection between the node plate and the support member 5, and weld a steel back plate at the welding groove reserved on the node plate flange. Specifically, weld a first back plate 9 on the first node plate 3, and weld a second back plate 10 on the second node plate 4. This back plate can be used for positioning during the subsequent installation of the BRB support member, and can also be used as a weld backing plate when welding the BRB support member.

[0058] Step S03, when the support member 5 is manufactured in the factory, three lifting ears should be welded at the port and the center of gravity position along the center line on the upward side during installation. Specifically, the center of gravity lifting ear 11 is installed on the upper side corresponding to the center of gravity position of the support member 5, and the left lifting ear 12 and the right lifting ear 13 are installed on the support member 5 on both sides of the center of gravity lifting ear 11.

[0059] Step S04: During hoisting, the support member 5 is first transported to the installation location (under the beam). Adjustable hoists 14 are installed between the center of gravity lifting ring 6 and the center of gravity lifting lug 11, between the left lifting ring 7 and the left lifting lug 12, and between the right lifting ring 8 and the right lifting lug 13. Specifically, a 1T hand chain hoist is fixed to each of the three pre-embedded lifting rings at the bottom of the beam, for a total of three hand chain hoists. The hooks of the hand chain hoists are then passed through the lifting lugs. During hoisting, the three hand chain hoists work together to lift the support member 5.

[0060] The height and position of the support member 5 are monitored according to the one-meter line of the structure in conjunction with the laser leveler. First, the support member 5 is hoisted to the elevation using the adjustable sling 14 between the center of gravity ring 6 and the center of gravity ear 11. Then, the adjustable sling 14 between the left ring 7 and the left ear 12 and between the right ring 8 and the right ear 13 is used to lean the two ends of the support member 5 against the steel back plate. At this time, the first back plate 9 limits the upper end surface of the end of the support member 5, and the second back plate 10 limits the upper end surface of the end of the support member 5, so that the two ends of the support member 5 correspond to the connection points of the first node plate 3 and the second node plate 4 respectively, and the lifting and positioning of the support member 5 is completed.

[0061] Step S05, after the lifting and positioning is completed, the ends of the support member 5 are welded to the first node plate 3 and the second node plate 4. After the welding is completed, the adjustable spreader 14 is removed in sequence, and finally the lifting lugs and rings are cut off.

[0062] The aforementioned basic examples and their further alternatives can be freely combined to form multiple embodiments, all of which are applicable and claimed embodiments of the present invention. In the scheme of the present invention, each alternative can be arbitrarily combined with any other basic examples and alternatives.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fast and precise hoisting structure for a limited height internal buckling restrained support member, comprising a first node plate (3) and a second node plate (4) on a column (1) and a beam (2), characterized in that: A center of gravity lifting ring (6) and a left lifting ring (7) and a right lifting ring (8) are provided on the upper beam body (2); a center of gravity lifting lug (11) and a left lifting lug (12) and a right lifting lug (13) are provided on the supporting member (5); the center of gravity lifting ring (6), the center of gravity lifting lug (11) and the supporting member (5) are located on the same vertical line; an adjustable sling (14) is provided between the center of gravity lifting ring (6) and the center of gravity lifting lug (11), between the left lifting ring (7) and the left lifting lug (12), and between the right lifting ring (8) and the right lifting lug (13); The first node plate (3) is provided with a first back plate (9), and the first back plate (9) limits the upper end surface of the end of the supporting member (5); the second node plate (4) is provided with a second back plate (10), and the second back plate (10) limits the upper end surface of the end of the supporting member (5); the first node plate (3) is provided at the angle between the column (1) and the beam (2), and the second node plate (4) is provided at a non-node position of the beam (2).

2. The fast and precise lifting structure for a limited height internal buckling restrained support member according to claim 1, characterized in that: A first node plate (3) is provided at the angle between the left column (1) and the lower beam (2), and at the angle between the right column (1) and the lower beam (2), and a second node plate (4) is provided below the middle of the upper beam.

3. The fast and precise lifting structure for a limited height internal buckling restrained support member according to claim 1, characterized in that: The supporting member (5) is an I-shaped cross section or a box-shaped cross section.

4. The fast and precise hoisting structure for a limited height internal buckling restrained support member according to claim 1, characterized in that: The center of gravity lifting ring (6), the left lifting ring (7) and the right lifting ring (8) are all arranged on the center line of the beam.

5. A method for quickly and accurately lifting a limited height internal buckling restrained support member, comprising a first node plate (3) and a second node plate (4) on a column (1) and a beam (2), characterized in that: Step S01, finding the position of the center of gravity of the support member (5) corresponding to the upper beam (2) in the vertical direction when the support member (5) is installed, installing the center of gravity lifting ring (6) at the position of the beam (2), and installing the left lifting ring (7) and the right lifting ring (8) on both sides of the center of gravity lifting ring (6) on the beam (2); Step S02, processing the connection between the node plate and the supporting member (5); Step S03, installing a center of gravity lifting lug (11) on the upper side corresponding to the center of gravity position of the support member (5), and installing a left lifting lug (12) and a right lifting lug (13) on both sides of the center of gravity lifting lug (11) on the support member (5); Step S04, transporting the support member (5) to the installation position, setting adjustable slings (14) between the center of gravity lifting ring (6) and the center of gravity lifting lug (11), between the left lifting ring (7) and the left lifting lug (12), and between the right lifting ring (8) and the right lifting lug (13), using the adjustable slings (14) between the center of gravity lifting ring (6) and the center of gravity lifting lug (11) to lift the support member (5) to the elevation, using the adjustable slings (14) between the left lifting ring (7) and the left lifting lug (12), and between the right lifting ring (8) and the right lifting lug (13), so that the two ends of the support member (5) correspond to the connection points of the first node plate (3) and the second node plate (4) respectively; Step S05, welding the ends of the support member (5) to the first node plate (3) and the second node plate (4), and after the welding is completed, removing the adjustable hangers (14) in sequence, and finally removing the lifting lugs and lifting rings; In the step S02, a first back plate (9) is provided on the first node plate (3), and a second back plate (10) is provided on the second node plate (4). In the step S04, the first back plate (9) limits the upper end surface of the end of the supporting member (5), and the second back plate (10) limits the upper end surface of the end of the supporting member (5).

6. The method for rapid and precise hoisting of a limited height internal buckling restrained support member according to claim 5, characterized in that: A first node plate (3) is provided at the angle between the left column (1) and the lower beam (2), and at the angle between the right column (1) and the lower beam (2), and a second node plate (4) is provided below the middle of the upper beam.

7. The method for rapid and precise hoisting of a limited height internal buckling restrained support member according to claim 5, characterized in that: In the step S04, the height and position of the support member (5) are monitored based on the structure one-meter line in conjunction with a laser leveler.

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