A method for installing a viscous damper

Abstract

This invention discloses a method for installing a viscous damper, comprising an upper cantilever wall and a lower cantilever wall on the same plane. The upper cantilever wall is connected to an upper beam, and the lower cantilever wall is connected to a lower floor slab. A receiving space is formed between the upper and lower cantilever walls for installing the viscous damper. This invention optimizes the installation sequence and method of the viscous damper and, through the simple structural setting of the arc-shaped wedge, ensures accurate installation plane positioning of the viscous damper, guarantees the stability of the viscous damper during installation, and ensures that the viscous damper achieves the expected energy dissipation and vibration reduction effect after installation.

Description

Technical Field

[0001] This invention relates to the technical field of vibration damping equipment installation in building engineering, and specifically to a method for installing a viscous damper. Background Technology

[0002] Viscous dampers, as vibration reduction devices within a structure, deform when subjected to external excitations such as earthquakes. This deformation drives the piston rod of the viscous damper, creating a pressure difference across the piston. This forces the medium in the cylinder to pass through the damping structure on the piston, generating damping force and converting mechanical energy into heat energy, thus reducing structural vibration. However, viscous dampers are relatively heavy; a wall-mounted viscous damper weighs approximately 250 kg and is located in the middle of a cantilever wall, with a height of 850 mm and a narrow space. Manual handling and installation are extremely difficult, resulting in high installation accuracy, wasted manpower, and increased construction costs.

[0003] The installation of viscous dampers is affected by the installation accuracy of embedded parts. Deviations in the installation position of embedded parts will lead to deviations in the installation position of the viscous damper. Therefore, controlling the installation accuracy of embedded parts is particularly important in the installation of viscous dampers. The current construction sequence is: tying the reinforcement of the upper and lower cantilever walls – installing embedded parts – closing the formwork of the upper and lower cantilever walls – pouring concrete. The positions of the embedded parts are measured and located separately using a steel ruler, which makes it difficult to determine the planar position of the embedded parts. Pouring concrete separately for the upper and lower cantilever walls easily results in the upper and lower cantilever walls being in different planar positions, making it difficult to control the subsequent installation accuracy of the viscous damper, and also resulting in poor appearance quality of the cantilever wall concrete. This practice has a significant impact on the subsequent installation accuracy of the viscous damper, affecting the overall project quality. The installation planar position of the viscous damper requires high accuracy, within 5mm. If the viscous damper is not installed stably, its load-bearing performance will be affected, and it may not achieve the expected energy dissipation and vibration reduction effect.

[0004] Patent application CN201910324708.5 discloses a wall-mounted damper connecting component, comprising: embedded parts, angle steel, X-shaped clamping plates, a damper, and a box-shaped baffle with openings at both ends; the embedded parts are arranged in a set and symmetrically, each including a fixing plate and an extension plate; the fixing plate and the extension plates are fixed to form a T-shaped structure; the two extension plates are arranged in parallel; the angle steel is in two sets, each set is fixed to the edge of the extension plate, and the positions of the angle steel on the two extension plates correspond; the four ends of the X-shaped clamping plates are respectively fixed to the two angle steels on the same side of the extension plates; the damper is fixed between the two extension plates; the inner side of the box-shaped baffle is fixedly connected to the angle steel and surrounds the two extension plates and the damper on the outside, and the fixing plate is located outside the box-shaped baffle. This invention is used to solve the problem that the original construction method is affected by the construction site conditions and the skill level of the workers, resulting in the damper not being installed properly, and thus the damper cannot achieve the expected effect when working. However, this solution requires a separate set of connecting components, which is costly and complex in structure, making it difficult to operate. This results in increased construction costs and time for on-site construction. Summary of the Invention

[0005] To address the aforementioned problems, this invention discloses an installation method for a viscous damper, comprising an upper cantilever wall and a lower cantilever wall on the same plane. The upper cantilever wall is connected to an upper beam, and the lower cantilever wall is connected to a lower floor slab. A receiving space is formed between the upper and lower cantilever walls for installing the viscous damper. This invention optimizes the installation sequence and method of the viscous damper and, through the simple structural design of the arc-shaped wedge, ensures accurate installation plane positioning of the viscous damper, guarantees the stability of the viscous damper during installation, and ensures that the viscous damper achieves the expected energy dissipation and vibration reduction effect after installation.

[0006] The technical solution adopted in this invention is as follows:

[0007] This invention discloses a method for installing a viscous damper, comprising an upper cantilever wall and a lower cantilever wall on the same plane. The upper cantilever wall is connected to an upper beam, and the lower cantilever wall is connected to a lower floor slab. A receiving space is formed between the upper and lower cantilever walls for installing the viscous damper. The method includes the following steps:

[0008] S1: On-site layout and positioning to confirm the installation position of the viscous damper embedded parts. The embedded parts include anchor plates and anchor bars. The anchor plates are set on the connection end faces of the upper cantilever wall and the lower cantilever wall. The anchor bars are anchored into the upper cantilever wall and the lower cantilever wall through the anchor plates.

[0009] S2: After the embedded parts are installed, pour the concrete for the upper and lower cantilever walls. After the concrete is formed, install the viscous damper.

[0010] S3: Determine the installation point of the viscous damper, transport the viscous damper and components to the installation point, measure the installation dimensions of the installation point and compare them with the dimensions of the viscous damper and components, record the error between the measured dimensions of the installation point and the viscous damper and components, formulate a correction plan for the dimensional error, and use measuring and positioning tools to mark and position the installation point.

[0011] S4: A hoisting device including a viscous damper, the hoisting device hoisting the viscous damper and components to the installation point of the viscous damper, the components including an upper node plate and a lower node plate, the hoisting device hoisting and positioning the lower node plate, the lower node plate being installed on the embedded part connected to the lower cantilever wall; the hoisting device hoisting and positioning the viscous damper to the installation point of the viscous damper, using a pin to firmly connect the viscous damper to the lower node plate, and welding the lower node plate to the embedded part for fixation;

[0012] S5: One end of the viscous damper is fixed to the lower cantilever wall via the embedded part connected to the lower node plate. The other end of the viscous damper is lifted to a horizontal position via the jacking device. A pin is set to connect the viscous damper and the upper node plate. The upper node plate is installed on the embedded part connected to the upper cantilever wall and welded to the embedded part.

[0013] S6: One end of the viscous damper is connected and fixed to the lower cantilever wall through the lower node plate, and the other end is connected and fixed to the upper cantilever wall through the upper node plate. After installation, observe the overall coordination of the viscous damper installation. If there are no errors, apply paint to the collision points of the viscous damper and the connecting seat.

[0014] Furthermore, the viscous damper is welded to the upper node plate and the lower node plate, and an arc-shaped wedge is set. After the viscous damper is hoisted, the arc-shaped wedge is set in the gap between the viscous damper and the lower cantilever wall to fix the position of the viscous damper during the welding process.

[0015] Furthermore, the arc-shaped wedge includes a first arc-shaped wedge and a second arc-shaped wedge. The first arc-shaped wedge and the second arc-shaped wedge are inserted from both sides of the gap between the viscous damper and the lower cantilever wall. The first arc-shaped wedge and the second arc-shaped wedge are spliced ​​together to form a U-shaped arc-shaped envelope structure. The U-shaped arc-shaped envelope structure envelops and supports the viscous damper.

[0016] Furthermore, a lead screw is provided on the upper part of the arc-shaped wedge, the lead screw connects the first arc-shaped wedge and the second arc-shaped wedge, and the lead screw is connected to the arc-shaped wedge by a clamp, thereby limiting the displacement of the viscous damper.

[0017] Furthermore, the first and second arc-shaped wedges are arc-shaped transition structures, and the arc of the arc-shaped transition structure is composed of a quarter circle with a radius of 80-90mm. The arc of the first and second arc-shaped wedges matches the circular radius setting of the viscous damper.

[0018] Furthermore, the embedded parts are anchored into the upper and lower cantilever walls by anchor bars. The anchor bars include several bars, and the ends of the anchor bars that are anchored into the upper and lower cantilever walls are the ends of the anchor bars. Each end of the anchor bar is matched with a 70-80mm bonding steel bar, and the bonding steel bar is welded to the anchor bar on both sides.

[0019] The technical effects of this invention are as follows:

[0020] This invention discloses an installation method for viscous dampers, which effectively solves the problems of heavy viscous dampers, difficult manual handling and installation, high installation difficulty, difficulty in ensuring installation accuracy, waste of manpower, and increased construction costs.

[0021] The details are as follows:

[0022] 1. The present invention employs a method of precisely controlling the planar position of the viscous damper, which ensures that the upper and lower cantilever walls are in the same plane. The position of the embedded parts can be adjusted by controlling the template, thereby achieving the purpose of controlling the installation accuracy of the viscous damper and ensuring the quality of installation and construction.

[0023] 2. The method of fixing the viscous damper by arc-shaped wedges in this invention can effectively save labor and ensure the welding quality of the viscous damper and the upper node plate.

[0024] 3. The present invention uses welded and bonded steel bars to give the anchor bar of the viscous damper more leeway, which improves the bond strength with concrete, resulting in a more significant application effect and a significant increase in the building safety factor. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the installation of the viscous damper of the present invention;

[0026] Figure 2 This is a schematic diagram of a viscous damper fixed with a triangular wooden wedge in the prior art;

[0027] Figure 3 This is a schematic diagram of the arc-shaped wedge of the present invention;

[0028] Figure 4 This is a schematic diagram of the arc-shaped wedge fixing viscous damper of the present invention;

[0029] Figure 5 This is a schematic diagram of the embedded part structure of the present invention;

[0030] The markings in the diagram are: 1-Upper cantilever wall, 2-Lower cantilever wall, 3-Arched wedge, 301-First arc-shaped wedge, 302-Second arc-shaped wedge, 303-Threaded rod, 304-Clamp, 4-Bonded steel bar, 5-Viscous damper, 6-Embedded part, 601-Anchor bar, 602-Anchor plate, 7-Upper node plate, 8-Lower node plate, 9-Beam, 10-Floor slab. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings.

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] The data used in this embodiment is a preferred solution, but it is not intended to limit the present invention.

[0034] Example 1

[0035] like Figure 1-5 As shown, this embodiment provides a method for installing a viscous damper, including an upper cantilever wall and a lower cantilever wall on the same plane. The upper cantilever wall is connected to an upper beam, and the lower cantilever wall is connected to a lower floor slab. A receiving space is formed between the upper and lower cantilever walls for installing the viscous damper. The method includes the following steps:

[0036] S1: On-site layout and positioning are carried out to confirm the installation position of the viscous damper embedded parts. The embedded parts include anchor plates and anchor bars. The anchor plates are set on the connection end faces of the upper cantilever wall and the lower cantilever wall. The anchor bars are anchored into the upper cantilever wall and the lower cantilever wall through the anchor plates. The placement position of the embedded parts can be adjusted appropriately according to the actual site conditions.

[0037] In this embodiment, to ensure compliance with the installation dimensions of the viscous damper and avoid misalignment of the embedded parts, a level must be used during construction to check the horizontality of the upper surface of the embedded steel plate. The embedded parts must be leveled and straightened to ensure they are horizontal in both the transverse and longitudinal directions before being spot-welded to the main reinforcement bars on site. This prevents errors caused by movement of the embedded parts during on-site construction, which could affect subsequent construction steps. The next step of construction can only proceed after acceptance. When installing the anchor plate, a level must be used to check the horizontality of the upper surface of the anchor plate, ensuring it is horizontal in both the transverse and longitudinal directions before proceeding to the next step.

[0038] S2: After the embedded parts are installed, pour the concrete for the upper and lower cantilever walls. After the concrete is formed, install the viscous damper.

[0039] S3: Determine the installation point of the viscous damper, transport the viscous damper and components to the installation point, measure the installation dimensions of the installation point and compare them with the dimensions of the viscous damper and components, record the error between the measured dimensions of the installation point and the viscous damper and components, formulate a correction plan for the dimensional error, and use measuring and positioning tools to mark and position the installation point.

[0040] S4: A hoisting device including a viscous damper, the hoisting device hoisting the viscous damper and components to the installation point of the viscous damper, the components including an upper node plate and a lower node plate, the hoisting device hoisting and positioning the lower node plate, the lower node plate being installed on the embedded part connected to the lower cantilever wall; the hoisting device hoisting and positioning the viscous damper to the installation point of the viscous damper, using a pin to firmly connect the viscous damper to the lower node plate, and welding the lower node plate to the embedded part for fixation;

[0041] S5: One end of the viscous damper is fixed to the lower cantilever wall via the embedded part connected to the lower node plate. The other end of the viscous damper is lifted to a horizontal position via the jacking device. A pin is set to connect the viscous damper and the upper node plate. The upper node plate is installed on the embedded part connected to the upper cantilever wall and welded to the embedded part.

[0042] S6: One end of the viscous damper is fixed to the lower cantilever wall via the lower node plate, and the other end is fixed to the upper cantilever wall via the upper node plate. After installation, observe the overall coordination of the viscous damper installation. If there are no errors, touch up the paint on the collision points of the viscous damper and the connecting seat. Finally, it is necessary to determine whether the installation position of the viscous damper meets the design requirements and the overall aesthetic coordination of the viscous damper after installation.

[0043] Example 2

[0044] There is a certain gap between the viscous damper and the upper and lower cantilever walls, resulting in a relatively large self-weight of the viscous damper after it is hoisted to the installation position. Therefore, when welding the viscous damper to the upper and lower node plates, it needs to be firmly fixed to ensure the welding quality and installation accuracy of the viscous damper. Figure 2 As shown, a triangular wooden wedge is inserted into the gap between the viscous damper and the lower cantilever wall to fix the viscous damper. However, this method has drawbacks. Because the viscous damper is cylindrical, the triangular wedge does not make full contact with it, resulting in incomplete insertion and displacement of the damper. This affects welding quality and installation accuracy. Often, manual assistance is required to adjust the damper's position to barely maintain welding quality and installation accuracy, leading to wasted manpower and poor economic efficiency.

[0045] During the installation of viscous dampers, due to their heavy weight, it is necessary to fix the dampers in place when welding the upper and lower node plates. Traditional triangular wooden wedges cannot meet the construction requirements. Figure 4 As shown, this embodiment provides a method for installing a viscous damper. The viscous damper is welded to the upper node plate and the lower node plate. An arc-shaped wedge is set, preferably an arc-shaped wooden wedge, to fix the viscous damper and provide support and stability for the welding of the upper node plate. After the viscous damper is hoisted, the arc-shaped wedge is set in the gap between the viscous damper and the lower cantilever wall to fix the position of the viscous damper during the welding process.

[0046] In this embodiment, the arc-shaped wedge includes a first arc-shaped wedge and a second arc-shaped wedge. The first arc-shaped wedge and the second arc-shaped wedge are inserted from both sides of the gap between the viscous damper and the lower cantilever wall. The first arc-shaped wedge and the second arc-shaped wedge are spliced ​​together to form a U-shaped arc-shaped envelope structure. The U-shaped arc-shaped envelope structure envelops and supports the viscous damper. Furthermore, an arc shape is made according to the cylindrical size of the viscous damper. When inserted between the viscous damper and the lower cantilever wall, it can make full contact with the viscous damper, making it less prone to loosening. It can perfectly assist welding construction and ensure installation accuracy. The first arc-shaped wedge and the second arc-shaped wedge are arc-shaped transition structures. Preferably, the arc of the arc-shaped transition structure is composed of a 1 / 4 circle with a radius of 85mm. The arc of the first arc-shaped wedge and the second arc-shaped wedge are matched with the circular radius of the viscous damper, so that they can contact the viscous damper with the maximum area. The first arc-shaped wedge and the second arc-shaped wedge are set to fix the viscous damper on the left and right, respectively, and are both set at the maximum radius of the viscous damper.

[0047] In this embodiment, a lead screw is provided at the upper part of the arc-shaped wedge. The lead screw connects the first arc-shaped wedge and the second arc-shaped wedge. The lead screw is connected to the arc-shaped wedge by a clamp, and the lead screw is configured to limit the displacement of the viscous damper. Preferably, a Ф14 lead screw is used to reinforce the arc-shaped wedge. After the viscous damper is fixed, it is not easy to move left or right or up or down. This effectively fixes the viscous damper and eliminates the need for manual assistance in fixing and adjusting its position during the process, ensuring welding quality and installation accuracy, and effectively saving labor.

[0048] Example 3

[0049] In the prior art, the anchoring methods at both ends of the viscous damper include pre-embedded steel plates or pre-embedded anchor bars. Pre-embedded steel plates have a complex structure and often conflict with the wall reinforcement, making them difficult to implement. In this embodiment, anchor bars are selected for anchoring. The anchor bars are ribbed steel bars, which rely on the bonding, gripping and friction between the steel bars and the concrete to provide sufficient anchoring.

[0050] In this embodiment, a method for installing a viscous damper is provided, such as... Figure 1 and 5As shown, the embedded part is anchored into the upper and lower cantilever walls by anchor bars. The anchor bars include several bars, and the ends of the anchor bars that are anchored into the upper and lower cantilever walls are the ends of the anchor bars. Preferably, in order to ensure that the anchor bars connecting the viscous damper and the concrete anchor have more slack, each anchor bar end is matched with a 75mm bonding steel bar, and the bonding steel bar is welded to the anchor bar on both sides.

[0051] In this embodiment, unlike the existing techniques of bending anchors or lengthening anchor bars, the technical solution adopted in this embodiment is simple to operate and highly feasible. Preferably, 14 bonded steel bars are used to match the anchor bars, and the type and specifications of the bonded steel bars are consistent with those of the anchor bars; one bonded steel bar is welded to each anchor bar to enhance the bonding force with the concrete.

[0052] In this embodiment, by analyzing the original bond strength between the threaded steel and concrete and combining it with the on-site construction conditions, a 75mm bonding steel bar is added to the end of the anchor bar. This can enhance the bond strength between the viscous damper and the concrete, and solve the problem of falling off due to insufficient bond strength after an earthquake.

[0053] The above description is merely 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 within the protection scope of the present invention.

Claims

1. A method for installing a viscous damper, comprising an upper cantilever wall (1) and a lower cantilever wall (2) on the same plane, the upper cantilever wall (1) being connected to an upper beam (9), the lower cantilever wall (2) being connected to a lower floor slab (10), and a receiving space being formed between the upper cantilever wall (1) and the lower cantilever wall (2), the receiving space being used for installing a viscous damper (5), characterized in that, Includes the following steps: S1: On-site layout and positioning to confirm the installation position of the viscous damper (5) embedded part (6). The embedded part (6) includes an anchor plate (602) and an anchor bar (601). The anchor plate (602) is set on the connection end face of the upper cantilever wall (1) and the lower cantilever wall (2). Through the anchor plate (602), the anchor bar (601) is anchored into the upper cantilever wall (1) and the lower cantilever wall (2). S2: After the embedded part (6) is installed, pour the concrete for the upper cantilever wall (1) and the lower cantilever wall (2). After the concrete is formed, install the viscous damper (5). S3: Determine the installation point of the viscous damper (5), transport the viscous damper (5) and components to the installation point, measure the installation dimensions of the installation point and compare them with the dimensions of the viscous damper (5) and components, record the error between the measured dimensions of the installation point and the viscous damper (5) and components, formulate a correction plan for the dimensional error, and use measuring and positioning tools to mark and position the installation point; S4: A hoisting device including a viscous damper (5) is used to hoist the viscous damper (5) and components to the installation point of the viscous damper (5). The components include an upper node plate (7) and a lower node plate (8). The hoisting device hoists and positions the lower node plate (8). The lower node plate (8) is installed on the embedded part (6) connected to the lower cantilever wall (2). The hoisting device hoists and positions the viscous damper (5) to the installation point of the viscous damper (5). The viscous damper (5) is firmly connected to the lower node plate (8) by a pin shaft. The lower node plate (8) is welded and fixed to the embedded part (6). S5: One end of the viscous damper (5) is fixed to the embedded part (6) connected to the lower cantilever wall (2) through the lower node plate (8), and the other end of the viscous damper (5) is lifted to the horizontal position through the jacking device. A pin is set to connect the viscous damper (5) and the upper node plate (7). The upper node plate (7) is installed on the embedded part (6) connected to the upper cantilever wall (1) and welded to the embedded part (6). S6: One end of the viscous damper (5) is connected and fixed to the lower cantilever wall (2) through the lower node plate (8), and the other end is connected and fixed to the upper cantilever wall (1) through the upper node plate (7). After installation, observe the overall coordination of the viscous damper (5). If there are no errors, apply paint to the collision points of the viscous damper (5) and the connecting seat. The viscous damper (5) is welded to the upper node plate (7) and the lower node plate (8), and an arc wedge (3) is set. After the viscous damper (5) is hoisted, the arc wedge (3) is set in the gap between the viscous damper (5) and the lower cantilever wall (2) to fix the position of the viscous damper (5) during the welding process. The arc-shaped wedge (3) includes a first arc-shaped wedge (301) and a second arc-shaped wedge (302). The first arc-shaped wedge (301) and the second arc-shaped wedge (302) are inserted from both sides of the gap between the viscous damper (5) and the lower cantilever wall (2). The first arc-shaped wedge (301) and the second arc-shaped wedge (302) are spliced ​​together to form a U-shaped arc-shaped envelope structure. The U-shaped arc-shaped envelope structure envelops and supports the viscous damper (5). The upper part of the arc wedge (3) is provided with a lead screw (303), which connects the first arc wedge (301) and the second arc wedge (302). The lead screw (303) is connected to the arc wedge (3) through a clamp (304). The lead screw (303) is set to limit the displacement of the viscous damper (5).

2. The installation method of the viscous damper according to claim 1, characterized in that, The first arc-shaped wedge (301) and the second arc-shaped wedge (302) are arc-shaped transition structures. The arc of the arc-shaped transition structure is composed of a 1 / 4 circle with a radius of 80-90mm. The arc of the first arc-shaped wedge (301) and the second arc-shaped wedge (302) fits the circular radius of the viscous damper (5).

3. The installation method of the viscous damper according to claim 1, characterized in that, The embedded part (6) is anchored into the upper cantilever wall (1) and the lower cantilever wall (2) by anchor bars (601). The anchor bars (601) include several bars. The ends of the anchor bars (601) that are anchored into the upper cantilever wall (1) and the lower cantilever wall (2) are the ends of the anchor bars (601). Each end of the anchor bar (601) is matched with a 70-80mm bonding steel bar (4). The bonding steel bar (4) is welded to the anchor bar (601) on both sides.

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