Large-span concrete structure construction method based on frequency modulation mass damper

Abstract

The invention discloses a large-span concrete structure construction method based on a frequency modulation mass damper, which comprises the following steps: firstly, erecting a formwork body, paving a beam bottom formwork, and then binding beam steel bars; then, profile steel embedded parts are installed, embedded lug plates are welded, and H-shaped steel beams are installed; then, a beam side mold is closed and reinforced; then, a frequency modulation mass damper is installed and welded and fixed, and a weld joint is coated with anti-corrosion and fireproof paint; construction of a structural formwork is conducted on the portion where the frequency modulation mass damper is installed; finally, concrete is poured; and after concrete pouring is completed, the formwork is removed, and construction of the large-span concrete structure with the frequency modulation mass damper is completed. The purpose of saving the construction period is achieved by improving the construction process, the project of reserving a hoisting hole is omitted by installing the damper in place in advance at a time, the risk of leakage of the structural slab due to a construction joint can be avoided, and the purpose of saving the construction period can be further achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction. Specifically, it relates to a construction method for long-span concrete structures based on tuned mass dampers. Background Art

[0002] With the continuous progress of building technology, more and more large buildings adopt long-span structures, such as stadiums, and the requirements for structural safety and comfort are also increasing day by day. As an efficient shock absorption technology, the tuned mass damper (TMD) has been widely used in long-span stadium projects, and its shock absorption and seismic resistance effects are remarkable. The spatial structure of long-span stadiums is usually relatively complex, and there may be certain space limitations, resulting in a relatively cramped hoisting position for the damper.

[0003] Traditional dampers are installed after the main structure construction is completed. The structure needs to consider in advance the requirements for damper hoisting, and reserve hoisting holes in the structural slab in advance. After the damper is installed, the hoisting holes are closed again. The construction process is relatively cumbersome, the construction time is relatively long, and leaving hoisting holes in the roof structural slab leads to a relatively high probability of leakage at this part. Once the structure leaks, it is difficult and costly to repair, and there are quality risks. In addition, the damper can also be hoisted from below the structural floor slab and pulled up to the slab top using a chain hoist, install the damper base, and lower the damper to the support beam position. However, this method has relatively large potential safety risks in installation, involves high-altitude hoisting operations, is inconvenient for workers to operate, and requires the erection of a high-altitude operation platform, with safety risks. Therefore, there is a need for a construction method for long-span concrete structures based on tuned mass dampers that can install tuned mass dampers in a narrow space conveniently, quickly, safely and efficiently. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for long-span concrete structures based on tuned mass dampers that can install tuned mass dampers in a narrow space conveniently, quickly, safely and efficiently, and install the damper in place in advance during the construction stage of the structural formwork support system at one time. This method has simple processes, saves progress, is conducive to the quality and safety control of the construction site, and achieves the purpose of cost savings.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: A construction method for long-span concrete structures based on tuned mass dampers includes the following steps: (1) Erect the formwork support and lay the bottom formwork of the beam, and then bind the beam steel bars; (2) Install the steel embedded parts and weld the embedded ear plates; (3) Install the H-shaped steel beam; (4) Close and reinforce the side formwork of the beam: (5) Install the tuned mass damper and fix it by welding, and paint the welds with anti-corrosion and fireproof paint; (6) Construct the structural formwork at the location where the tuned mass damper is installed; (7) Pour concrete; (8) Remove the formwork to complete the construction of the long-span concrete structure with the tuned mass damper.

[0006] The specific process of step (1) is as follows: Erect the formwork support system for the beam and slab according to the erection parameters of the formwork support system plan. The formwork support system for the beam and slab is supported by a socketed disc-type steel pipe scaffold. The support steel pipes at the corresponding positions of the tuned mass damper are adjusted to the elevation of the bottom of the steel section beam. When installing the steel section beam, use the corresponding adjustable jacks for precise adjustment; After the bottom formwork of the beam is laid, tie the steel bars of the frame beam without closing the side formwork of the beam. After installing the steel section embedded parts and completing the welding of the support steel sections, then close the side formwork of the beam.

[0007] The specific process of step (2) is as follows: According to the position markings on the construction drawings, accurately measure and mark the positions of the steel section embedded parts in the structural frame beam, tie or weld the steel section embedded parts to the concrete steel bars, and weld the embedded ear plates after the installation of the steel section embedded parts is completed.

[0008] The specific process of step (3) is as follows: First, measure the horizontal distance between the two H-shaped steel beams in the reserved space for installing the tuned mass damper, and cut and adjust the length of the support steel beam of the tuned mass damper according to the actual measured value; then use a hoisting device to hoist the H-shaped steel beam to the predetermined position and fix the H-shaped steel beam with a formwork support frame, and adjust the vertical elevation of the H-shaped steel beam through the adjustable jacks at the top of the formwork support frame.

[0009] The specific process of step (4) is as follows: Process and install the side formwork of the beam at the corresponding positions of the steel section embedded parts. The periphery of the steel section embedded parts uses concave-convex type standardized formwork joints. Stick double-sided tape around the steel section embedded parts, and then install the side formwork of the beam. The concave-convex type standardized formwork is stuck around the embedded ear plates and closely adheres to the embedded plate of the steel section embedded parts. When removing the side formwork of the beam, first remove the concave formwork downward, and then remove the convex formworks on both sides.

[0010] The specific process of step (5) is as follows: After the side formwork of the beam is closed, hoist the tuned mass damper, weld and fix the tuned mass damper to the H-shaped steel beam, rust-remove the welds and the surrounding areas, remove surface rust, oxides and other contaminants, and evenly apply epoxy paint to the welds and the surrounding areas. After the first coat is applied, wait for the paint to dry and then apply the second coat.

[0011] The specific process of step (6) is as follows: Use double channel steel bearers to rest on the H-shaped steel beam where the tuned mass damper is installed, and place disc-type frame jacks on the double channel steel bearers; When laying the formwork, start from the periphery and close at the middle. The bottom formwork of the top slab is pressed on the side formworks of the primary and secondary beams. At the joints, nail them tightly and apply glass glue for strict sealing.

[0012] The specific process of step (7) is as follows: According to the position of the conveying pump, each construction section is poured from far to near, and is poured and vibrated in layers from the middle of the beam to both ends. The thickness of each layer is controlled at 450 - 550 mm. According to the pouring efficiency and the concrete volume of each frame beam, two frame beams are poured together each time, and each beam is poured 500 mm each time and alternated.

[0013] The specific operation process of step (8) is: When the concrete strength meets the formwork removal requirements, remove the formwork. First, remove the formwork backing bars and formwork on the side of the beam and the bottom of the slab around the tuned mass damper, and then remove the side formwork of the beam and the bottom formwork of the slab at the corresponding part of the tuned mass damper; After the primary and secondary steel pipe reinforcement backing bars are removed, the side formwork in contact with the concrete structure is pulled in a pulling manner from three directions: both sides and the bottom, and the side of the beam at the corresponding part of the tuned mass damper can be smoothly removed; When removing the bottom formwork of the slab above the tuned mass damper, first loosen the top support of the formwork chassis buckle frame, lower the corresponding square main purlin to the surface of the tuned mass damper, remove the primary and secondary backing bars, then slowly horizontally move the double channel steel support beam on the top of the H-shaped steel beam. One end of the double channel steel support beam falls between two H-shaped steel beams, lower the top support of the formwork chassis buckle frame to the lowest, then remove the top support of the formwork chassis buckle frame and the double channel steel support beam. Finally, remove the formwork between the bottom of the slab and the tuned mass damper, and pull out the formwork horizontally to complete the removal of the formwork and support system at the corresponding part of the tuned mass damper, and then complete the construction of the long-span concrete structure with a tuned mass damper.

[0014] The long-span concrete structure with a tuned mass damper includes a first structural beam and a second structural beam. The upper parts of the first structural beam and the second structural beam are connected by a structural slab. There are two symmetrically arranged front and rear H-shaped steel beams between the first structural beam and the second structural beam. A tuned mass damper is installed on the H-shaped steel beam. The lower parts of the first structural beam, the H-shaped steel beam, and the second structural beam are connected with a formwork support system for the beam and slab; The formwork support system for the beam and slab includes a number of longitudinal steel pipe scaffolds and a number of transverse steel pipe scaffolds. The longitudinal steel pipe scaffolds include a first steel pipe component connecting the bottom of the first structural beam, a second steel pipe component connecting the bottom of the second structural beam, and a third steel pipe component connecting the bottom of the H-shaped steel beam; The first steel pipe assembly and the second steel pipe assembly have the same structure, both comprising a first supporting steel pipe and a first adjusting top bracket installed on the upper part of the first supporting steel pipe, the third steel pipe assembly comprises a second supporting steel pipe and a second adjusting top bracket installed on the second supporting steel pipe, at least two first square main ribs are installed on the first adjusting top bracket, and at least two second square main ribs are installed on the second adjusting top bracket; The left and right ends of the H-shaped steel beam are respectively connected to the first structural beam and the second structural beam through the steel embedded parts, and the steel embedded parts and the H-shaped steel beam are connected through the embedded steel plates; The base of the frequency-modulated mass damper is welded on the H-shaped steel beam and temporary bolts and temporary nuts are arranged between the base and the H-shaped steel beam. Two double-slot steel supporting beams are arranged on the H-shaped steel beam. The two double-slot steel supporting beams are respectively located on both sides of the frequency-modulated mass damper. A third supporting steel pipe is arranged on each double-slot steel supporting beam. A disc-shaped frame top support is installed on the third supporting steel pipe. At least two second square main ribs are placed in the disc-shaped frame top support.

[0015] The present invention optimizes the construction process to achieve the installation of the damper before the structural concrete is poured, reducing the difficulty of secondary installation. The installation of the traditional damper is to be carried out after the main structure is completed. Considering the need for damper hoisting, a hoisting hole must be reserved in advance on the structural plate. After the damper is installed, the hoisting hole is closed, which is complicated and takes a long time to construct. The construction method of the present application is to install the damper in place in advance at one time, which is simple in process, saves progress, and saves installation costs.

[0016] The present invention utilizes a large-span structural formwork support system to coordinate the damper hoisting, adjusts the damper installation accuracy, and uses double-slot steel joists with adjustable supports to separate the damper from the upper structural formwork support, thereby disconnecting the damper from the upper structural formwork, ensuring that the bottom slab formwork can be removed smoothly after the floor slab concrete is poured.

[0017] This application takes into account the lifting load of the frequency-modulated mass damper and the support beam, designs the vertical pole positioning and spacing in advance, controls the vertical pole top support elevation, and uses the corresponding top support to adjust the elevation of the damper support steel beam. This method is convenient and fast, and the operation is simple; in addition, considering the embedded deviation of the embedded parts, the support steel beam is designed with adjustable elliptical hole positions, and the H-shaped steel beam and the steel embedded parts are hinged at the node with high-strength bolts, which is convenient for adjusting the embedded parts error. The main keel supported by the bottom of the H-shaped steel beam adopts a double-sided method in the top support, and the damper is hoisted on the top of the H-shaped steel beam, and finally the bottom formwork of the structural floor is installed. Furthermore, a double-slot steel support beam is fixed on the top of the steel beam, and the corresponding top support is inserted into the double-slot steel support beam as a support system for the bottom formwork of the plate above the adjustable damper, which can effectively improve the stability of the structure and ensure the structural strength.

[0018] The present invention improves the method for preventing slurry leakage of the damping support steel embedded parts. The periphery of the steel embedded parts adopts a concave-convex shaped standardized template joint design, which is convenient for installation and removal of the template and has a good effect on preventing slurry leakage. The size of each side of the steel embedded parts is increased by 100 mm according to the original design size. After the embedded parts are pre-embedded, the ear plates are welded first, double-sided tape is pasted around the embedded parts, and then the side formwork of the beam and the reinforcement system are installed. The concave-convex shaped template is clamped around the ear plates of the embedded parts and can be closely attached to the embedded plate of the embedded parts to prevent concrete slurry leakage. When removing the side formwork of the beam, the concave-shaped template is removed downward first, and then the convex-shaped templates on both sides are removed. The side formwork is removed by pulling, and the formwork removal is convenient. In summary, this application achieves the purpose of saving construction period by improving the construction process, and saves the project of reserving hoisting holes by installing the damper in place in one go. It can not only avoid the risk of leakage of the structural slab due to construction joints, but also further achieve the purpose of saving construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the beam-slab support formwork body of the present invention.

[0020] Figure 2 is an installation schematic diagram of the tuned mass damper of the present invention.

[0021] Figure 3 is a structural schematic diagram of a long-span concrete structure with a tuned mass damper of the present invention.

[0022] Figure 4 is Figure 3 the enlarged view of part A in

[0023] Figure 5 is a node schematic diagram of the steel embedded parts of this application.

[0024] Figure 6 is a structural schematic diagram of the embedded steel plate of this application.

[0025] Figure 7 is a structural schematic diagram of the concave-convex shaped standardized template of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0027] As Figure 1-7 shown, a construction method for a long-span concrete structure based on a tuned mass damper includes the following steps: (1) Erect the formwork support and lay the bottom formwork of the beam, and then bind the beam steel bars; (2) Install the steel embedded parts 24 and weld the embedded ear plates; (3) Install the H-shaped steel beam 4; (4) Enclose and reinforce the side formwork of the beam: (5) Install the tuned mass damper 5 and carry out welding fixation and painting of the welds with anti-corrosion and fireproof paint; (6) Construct the structural formwork at the location where the tuned mass damper 5 is installed; (7) Pour concrete; (8) Remove the formwork to complete the construction of the long-span concrete structure with the tuned mass damper 5.

[0028] The specific process of step (1) is as follows: Set up the formwork support system for the beam and slab 6 according to the erection parameters of the formwork support system plan. The formwork support system for the beam and slab 6 is supported by a socketed disc-type steel pipe scaffold. The support steel pipes at the corresponding positions of the tuned mass damper 5 are adjusted to the bottom elevation of the steel section beam. When installing the steel section beam, use the corresponding adjustable jacks for precise adjustment. In addition, for the convenience of on-site installation, the deepened design of the tuned mass damper 5 adopts the upper support installation method instead of the lower hanging method. Further, improve the anti-leakage slurry method of the steel section embedded part 24 of the tuned mass damper 5. Increase each side of the steel section embedded part 24 by 100 mm according to the original design size to ensure that the side formwork of the beam is closely attached to the steel section embedded part 24, and stick double-sided tape around the steel section embedded part 24 to prevent leakage of slurry.

[0029] After the bottom formwork of the beam is laid, bind the steel bars of the frame beam without closing the side formwork of the beam. After installing the steel section embedded part 24 and completing the welding of the support steel section, then close the side formwork of the beam.

[0030] The specific process of step (2) is as follows: According to the position markings on the construction drawings, accurately measure and mark the position of the steel section embedded part 24 in the structural frame beam, and bind or weld the steel section embedded part 24 to the concrete steel bars (using methods such as electric welding or gas welding. When welding, it is necessary to ensure the welding quality to ensure that the welds are firm and flat). After the installation of the steel section embedded part 24 is completed, weld the embedded part ear plates. Before welding, clean the welding surface of the ear plates to remove rust, oil stains, oxides and other sundries to ensure the welding quality. First, use spot welding or temporary fixing devices to position the ear plates to ensure their correct positions. After spot welding is completed, carry out full welding.

[0031] The specific process of step (3) is as follows: First, measure the horizontal distance between the two H-shaped steel beams 4 in the reserved space at the installation position of the tuned mass damper 5, and cut and adjust the length of the support steel beam of the tuned mass damper 5 according to the actual measured value; then use a lifting device (such as a tower crane) to hoist the H-shaped steel beam 4 to the predetermined position and fix the H-shaped steel beam 4 with a formwork support frame. Adjust the vertical elevation of the H-shaped steel beam 4 through the adjustable jacks at the top of the formwork support frame to ensure its vertical and horizontal positions are accurate. After all the bolts at the ends of the steel beams are tightened, check whether the bolts at all connection points are evenly tightened and whether there are problems such as looseness and cracks. Ensure that there are no gaps, misalignments, etc. at all bolt connections to ensure the structural connection is stable.

[0032] The specific process of step (4) is as follows: To facilitate the removal of the side formwork of the girder, it is necessary to process and install the side formwork of the corresponding part of the steel embedded part 24. The joints of the side formwork around the steel embedded part 24 are made of concave-convex shaped standardized formwork. Double-sided adhesive tape is pasted around the steel embedded part 24, and then the side formwork of the beam is installed. The concave-convex shaped standardized formwork is clamped around the embedded ear plates and closely attached to the embedded plate of the steel embedded part 24 to prevent concrete leakage. When removing the side formwork of the beam, first remove the concave formwork 26 downward, and then remove the convex formworks 27 on both sides.

[0033] The specific process of step (5) is as follows: After the side formwork of the beam is closed, hoist the tuned mass damper 5 and weld and fix the tuned mass damper 5 to the H-shaped steel beam 4. Rust removal is carried out on the weld and its surrounding area to remove surface rust, oxides and other contaminants. The weld and its surrounding area are evenly coated with epoxy paint. After the first coat is applied, wait for the paint to dry and then apply the second coat to ensure that the coating is uniform, complete, without bubbles, cracks or running.

[0034] The specific process of step (6) is as follows: Use double channel steel supporting beams 21 to rest on the H-shaped steel beam 4 where the tuned mass damper 5 is installed, and place the disc buckle formwork support 23 on the double channel steel supporting beams 21; When laying the formwork, start from the surrounding and close at the middle. The bottom formwork of the top plate is pressed on the side formworks of the main and secondary beams. At the joints, nail and stick tightly and apply glass glue for strict sealing. Prevent the cement mortar from drilling into the tuned mass damper 5 below during the concrete pouring, and a line should be pulled through for inspection to ensure that the corners are straight. Before binding the slab steel bars, the top plate formwork must be inspected and accepted. Use a 2m straightedge to check the surface flatness. If there are any over-standard areas, adjust the corresponding supports under the slab to adjust the flatness of the formwork.

[0035] The specific process of step (7) is as follows: According to the position of the concrete pump, each construction section is poured from far to near, and is poured and vibrated in layers from the middle of the beam to both ends. The thickness of each layer is controlled at 450 - 550mm. In order to avoid cold joints, every two frame beams are poured together each time, and each beam is poured 500mm each time and alternated. In view of the problem of dense steel bars in the core area of the beam-column of the long-span structure, self-compacting concrete is used for the vertical structure, and concrete of the same grade is used for the horizontal structure for pouring to avoid the situation that the dense steel bar concrete cannot be vibrated in place and to avoid generating intercepting cold joints at the beam-column joint part.

[0036] The specific operation process of step (8) is as follows: When the concrete strength meets the formwork removal requirements, remove the formwork. First, remove the formwork back ribs and formwork of the side and bottom of the beam around the tuned mass damper 5, and then remove the side formwork and bottom formwork of the beam corresponding to the tuned mass damper 5; After the primary and secondary reinforcement back ribs of the steel pipe are removed, the side formwork in contact with the concrete structure is pulled out in a drawing manner from three directions: both sides and the bottom, and then the side formwork of the beam at the position where the tuned mass damper is removed can be successfully removed. When removing the bottom formwork of the slab above the tuned mass damper 5, first loosen the top support 23 of the formwork buckle frame of the slab bottom, lower the corresponding square tube main rib to the surface of the tuned mass damper 5, remove the main and secondary back ribs, and then slowly horizontally move the double-channel steel support beam 21 on the top of the H-shaped steel beam 4. One end of the double-channel steel support beam 21 falls between the two H-shaped steel beams 4. Lower the top support 23 of the formwork buckle frame to the lowest position, then the top support 23 of the formwork buckle frame and the double-channel steel support beam 21 can be removed. Finally, remove the formwork between the slab bottom and the tuned mass damper 5, and draw out the formwork in the horizontal direction to complete the removal of the formwork and support system at the corresponding position of the tuned mass damper 5, and further complete the construction of the long-span concrete structure with the tuned mass damper.

[0037] The long-span concrete structure with a tuned mass damper includes a first structural beam 1 and a second structural beam 2. The upper parts of the first structural beam 1 and the second structural beam 2 are connected by a structural slab 3. There are two symmetric front and rear H-shaped steel beams 4 arranged between the first structural beam 1 and the second structural beam 2. A tuned mass damper 5 is installed on the H-shaped steel beam 4. The lower parts of the first structural beam 1, the H-shaped steel beam 4, and the second structural beam 2 are connected with a beam and slab formwork support body 6. The beam and slab formwork support body 6 includes a number of longitudinal steel pipe scaffolds and a number of transverse steel pipe scaffolds 10. The longitudinal steel pipe scaffolds include a first steel pipe assembly 7 connected to the bottom of the first structural beam 1, a second steel pipe assembly 8 connected to the bottom of the second structural beam 2, and a third steel pipe assembly 9 connected to the bottom of the H-shaped steel beam 4. The first steel pipe assembly 7 and the second steel pipe assembly 8 have the same structure, and both include a first support steel pipe 11 and a first adjusting top support 12 installed on the upper part of the first support steel pipe 11. The third steel pipe assembly 9 includes a second support steel pipe 13 and a second adjusting top support 14 installed on the second support steel pipe 13. At least two first square tube main ribs 15 are installed on the first adjusting top support 12, and at least two second square tube main ribs 16 are installed on the second adjusting top support 14. Both the left and right ends of the H-shaped steel beam 4 are respectively connected to the first structural beam 1 and the second structural beam 2 through steel section embedded parts 24. The steel section embedded parts 24 and the H-shaped steel beam 4 are connected by embedded steel plates 25. Oval holes 17 for adjusting and fixing points are designed at the ends of the H-shaped steel beam 4 to facilitate the adjustment of the errors of the steel section embedded parts 24. The H-shaped steel beam 4 and the steel section embedded parts 24 adopt high-strength bolt hinged joints 18.

[0038] The base of the tuned mass damper 5 is welded to the H-shaped steel beam 4, and temporary bolts 19 and temporary nuts 20 are arranged between the base and the H-shaped steel beam 4. The tuned mass damper 5 is welded to the H-shaped steel beam 4, and M20 bolts + nuts (temporary bolts 19 and temporary nuts 20) are used as temporary fixing measures. Two double-channel steel joists 21 are arranged on the H-shaped steel beam 4. The two double-channel steel joists 21 are respectively located on both sides of the tuned mass damper 5. A third support steel pipe 22 is arranged on each double-channel steel joist 21. A disc buckle formwork support top bracket 23 is installed on the third support steel pipe 22, and at least two second square tube main ribs 16 are placed in the disc buckle formwork support top bracket 23.

[0039] The present invention optimizes the construction process to achieve the installation of the damper before the structural concrete is poured, thereby reducing the difficulty of secondary installation. The installation of the traditional damper is to be carried out after the main structure is completed. Considering the need for hoisting the damper, a hoisting hole must be reserved in advance on the structural plate 3. After the damper is installed, the hoisting hole is closed, and the process is complicated and the construction time is long. The construction method of the present application is to install the damper in place in advance at one time, with a simple process, saving progress and installation costs. The present invention utilizes a large-span structural formwork support system to coordinate the damper hoisting, adjusts the damper installation accuracy, and uses a double-slot steel support beam 21 adjustable support to separate the damper from the upper structural formwork support, thereby disconnecting the damper from the upper structural formwork, and ensuring that the bottom formwork is smoothly removed after the floor slab concrete is poured. In the design of the high formwork support system, the damper and support beam hoisting loads are taken into consideration, the vertical pole positioning and spacing are designed in advance, the vertical pole top support elevation is controlled, and the damper support steel beam elevation is adjusted using the corresponding top support. This method is convenient and easy to operate. In addition, considering the embedded deviation of the embedded parts, the support steel beam is designed with an adjustable elliptical hole position 17, and the H-shaped steel beam 4 and the steel embedded parts 24 use high-strength bolt hinge nodes 18 to facilitate the adjustment of the embedded parts error. The main keel supported by the bottom of the H-shaped steel beam 4 adopts a double-way method in the top support, and the damper is hoisted on the top of the H-shaped steel beam 4, and finally the bottom formwork of the structural floor is installed. Furthermore, a double-slot steel support beam 21 is fixed on the top of the steel beam, and the corresponding top support is inserted into the double-slot steel support beam 21 as a support system for adjusting the bottom formwork of the plate above the damper, which can effectively improve the stability of the structure and ensure the structural strength. The present invention improves the anti-leakage method of the damper support steel embedded part 24. The periphery of the steel embedded part 24 adopts a concave-convex standardized template joint design, the template is easy to install and disassemble, and the anti-leakage effect is good. Increase the size of each side of the steel embedded part 24 by 100mm according to the original design size. After the embedded part is embedded, the ear plate is welded first, and double-sided tape is pasted around the embedded part. Then the beam side template and reinforcement system are installed. The concave-convex template 27 is stuck around the embedded part ear plate and can be close to the embedded part embedded plate to prevent concrete leakage. When removing the beam side formwork, first remove the concave template 26 downward, and then remove the convex templates 27 on both sides. The side formwork is removed by pulling and pulling, and the demolding is convenient. The present application achieves the purpose of saving construction time by improving the construction process, and saves the project of reserving the hoisting hole by installing the damper in place in advance at one time, which can avoid the risk of leakage of the structural plate 3 due to the construction joint and further achieve the purpose of saving construction time.

[0040] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper, characterized in that: The steps include: (1) Set up the formwork frame and lay the beam bottom formwork, then tie the beam reinforcement; (2) Install the embedded steel parts and weld the embedded lug plates; (3) Install H-shaped steel beams; (4) Close and reinforce the beam side formwork: (5) Install the frequency modulation mass damper and fix it by welding and paint the weld with anti-corrosion and fire-proof paint; (6) Construction of structural formwork at the location where the frequency-tuned mass damper is installed; (7) pouring concrete; (8) Remove the formwork and complete the construction of the large-span concrete structure with tuned mass damper.

2. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 1, characterized in that: The specific process of step (1) is as follows: erecting the beam and slab formwork frame according to the erection parameters of the formwork support system plan, the beam and slab formwork frame adopts a socket-type disc-locked steel pipe scaffolding for support, the supporting steel pipe on the corresponding part of the frequency-tuned mass damper is adjusted to the bottom elevation of the steel beam, and when the steel beam is to be installed, the corresponding adjustable top support is used for precise adjustment; After the bottom formwork of the beam is laid, the reinforcement of the frame beam is tied without closing the side formwork of the beam. After the embedded steel parts are installed and the supporting steel is welded, the side formwork of the beam is closed.

3. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 2, characterized in that: The specific process of step (2) is as follows: according to the position marking on the construction drawing, accurately measure and mark the position of the steel embedded parts in the structural frame beam, tie or weld the steel embedded parts to the concrete reinforcement, and weld the embedded ear plates after the steel embedded parts are installed.

4. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 3, characterized in that: The specific process of step (3) is as follows: first, measure the horizontal distance between the two H-shaped steel beams in the reserved space of the installation position of the tuned mass damper, and cut and adjust the length of the tuned mass damper support steel beam according to the actual measured value; then, use the lifting equipment to lift the H-shaped steel beam to the predetermined position, and fix the H-shaped steel beam with the formwork support frame, and adjust the vertical elevation of the H-shaped steel beam by the adjustable top support on the top of the formwork support frame.

5. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 4, characterized in that: The specific process of step (4) is as follows: the beam side formwork of the corresponding part of the steel embedded part is processed and installed, the concave and convex standardized formwork is used to splice the periphery of the steel embedded part, double-sided tape is affixed around the steel embedded part, and then the beam side formwork is installed. The concave and convex standardized formwork is stuck around the embedded ear plate and is close to the embedded plate of the steel embedded part. When removing the beam side formwork, first remove the concave formwork downwards, and then remove the convex formwork on both sides.

6. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 5, characterized in that: The specific process of step (5) is as follows: after the beam side formwork is closed, the frequency-tuned mass damper is hoisted and welded to the H-shaped steel beam, the weld and its surrounding area are derusted, surface rust, oxides and other pollutants are removed, and epoxy paint is evenly applied to the weld and its surrounding area. After the first coat, wait for the paint to dry before applying the second coat.

7. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 6, characterized in that: The specific process of step (6) is: a double-groove steel joist is placed on the H-shaped steel beam on which the frequency-tuned mass damper is installed, and a buckle frame top support is placed on the double-groove steel joist; When laying the formwork, start from the four sides and close it in the middle. Press the bottom formwork of the top plate onto the side forms of the primary and secondary beams. Nail the joints tightly and apply glass glue to seal them tightly.

8. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 7, characterized in that: The specific process of step (7) is as follows: according to the position of the delivery pump, each construction section is poured from far to near, and the concrete is poured and vibrated in layers from the middle of the beam to both ends. The thickness of each layer is controlled at 450-550 mm. According to the pouring efficiency and the concrete volume of each frame beam, two frame beams are poured together each time, and each beam is poured 500 mm each time, alternating with each other.

9. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 8, characterized in that: The specific operation process of step (8) is as follows: when the concrete strength meets the requirements for demolding, the formwork is removed, firstly, the formwork back ribs and formwork of the beam side and the slab bottom around the frequency-tuned mass damper are removed, and then the beam side formwork and the slab bottom formwork of the corresponding parts of the frequency-tuned mass damper are removed; After the primary and secondary reinforcement back ribs of the steel pipe are removed, the side formwork in contact with the concrete structure is pulled apart from the two sides and the bottom in three directions, and the beam side of the frequency modulation mass damper can be removed smoothly; When removing the bottom formwork of the slab above the frequency-tuned mass damper, first loosen the top support of the bottom plate buckle frame, lower the corresponding square tube main rib to the surface of the frequency-tuned mass damper, remove the main and secondary back ribs, and then slowly move the double-slot steel support beam horizontally on the top of the H-shaped steel beam. One end of the double-slot steel support beam falls between the two H-shaped steel beams, and the top support of the buckle frame is adjusted to the lowest position. The top support of the buckle frame and the double-slot steel support beam can be removed, and finally the formwork between the bottom of the slab and the frequency-tuned mass damper is removed, and the formwork is pulled out in the horizontal direction to complete the removal of the formwork and support system of the corresponding parts of the frequency-tuned mass damper, thereby completing the construction of the large-span concrete structure with the frequency-tuned mass damper.

10. A method for constructing a large-span concrete structure based on a frequency-tuned mass damper according to claim 9, characterized in that: The long-span concrete structure with a tuned mass damper includes a first structural beam and a second structural beam, the first structural beam and the second structural beam are connected at the top by a structural plate, two front-to-back symmetrical H-shaped steel beams are arranged between the first structural beam and the second structural beam, the tuned mass damper is installed on the H-shaped steel beam, and the first structural beam, the H-shaped steel beam and the second structural beam are connected at the bottom with a beam-slab formwork frame; The beam and slab formwork frame includes a plurality of longitudinal steel pipe scaffolds and a plurality of transverse steel pipe scaffolds, wherein the longitudinal steel pipe scaffolds include a first steel pipe assembly connected to the bottom of the first structural beam, a second steel pipe assembly connected to the bottom of the second structural beam, and a third steel pipe assembly connected to the bottom of the H-shaped steel beam; The first steel pipe assembly and the second steel pipe assembly have the same structure, both comprising a first supporting steel pipe and a first adjusting top bracket installed on the upper part of the first supporting steel pipe, the third steel pipe assembly comprises a second supporting steel pipe and a second adjusting top bracket installed on the second supporting steel pipe, at least two first square main ribs are installed on the first adjusting top bracket, and at least two second square main ribs are installed on the second adjusting top bracket; The left and right ends of the H-shaped steel beam are respectively connected to the first structural beam and the second structural beam through the steel embedded parts, and the steel embedded parts and the H-shaped steel beam are connected through the embedded steel plates; The base of the frequency-modulated mass damper is welded on the H-shaped steel beam and temporary bolts and temporary nuts are arranged between the base and the H-shaped steel beam. Two double-slot steel supporting beams are arranged on the H-shaped steel beam. The two double-slot steel supporting beams are respectively located on both sides of the frequency-modulated mass damper. A third supporting steel pipe is arranged on each double-slot steel supporting beam. A disc-shaped frame top support is installed on the third supporting steel pipe. At least two second square main ribs are placed in the disc-shaped frame top support.

Images