Construction method and construction device of back-mounted frequency modulation mass damper

Abstract

The invention relates to the technical field of building construction, in particular to a construction method and device of a back-mounted frequency modulation mass damper. The construction method of the back-mounted frequency modulation mass damper comprises the steps that in the floor system reinforcing steel bar binding stage, the hanging rings are pre-buried, and then floor system concrete is poured; the dynamic characteristics of the floor system are tested, target parameters of the frequency modulation mass damper are corrected based on measured data, and customized production is completed; the frequency modulation mass damper and a platform beam are assembled on a supporting floor below the floor system; an upper lifting hook of a hoist crane is hung on the lifting ring, and a lower lifting hook of the hoist crane is hung on a lifting lug on the platform beam; and lifting the platform beam to the designed mounting height and connecting the platform beam with the structural beam. The method has the beneficial effects that after-loading construction accurately matches TMD parameters by actually measuring the dynamic characteristics of the floor system, and the vibration reduction efficiency is improved; two hoisting technologies of vertical direct connection and hoisting-rotating combination are provided, different space conditions are flexibly adapted, and the problems that a traditional TMD is detuned and installation is limited are solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a construction method and a construction device of a rear-mounted frequency-modulated mass damper. Background Art

[0002] Tuned Mass Damper (TMD) is a key device for suppressing vertical vibration of floor slabs and improving human vibration comfort. It has been widely used in building structures such as large-span floor slabs and sky corridors. Traditional construction methods usually adopt a pre-installation installation process, that is, the TMD base and TMD body are pre-installed before pouring concrete of the floor slab. Although this method can shorten the construction period, its core defect is that the design parameters of TMD (including natural frequency, damping ratio, etc.) need to be determined by the theoretical dynamic characteristics model of the floor slab, while the material properties, boundary constraints and connection stiffness of the floor slab in actual construction often have significant deviations from the theoretical model. Due to the limited adjustment range of the spring stiffness and mass block of conventional TMD, when the actual dynamic characteristics of the floor slab exceed the preset adjustment threshold, the vibration reduction efficiency of TMD will drop sharply or even fail completely, making it difficult to achieve the structural vibration control target.

[0003] In response to the above problems, the existing technology attempts to optimize through adjustable TMD design, such as using variable stiffness springs or solutions that can increase or decrease mass blocks. However, such improvement solutions still have limitations: first, its adjustment mechanism needs to rely on the pre-set deviation range of the dynamic characteristics of the floor, and the measured parameters of the floor after actual construction are unpredictable, which may cause the adjustment range to fail to cover the actual needs; second, the pre-installation process makes it difficult to accurately simulate the dynamic coupling effect between the TMD and the floor structure. Even if an adjustable parameter design is used, the system may still be detuned due to improper installation timing, affecting the final vibration reduction effect.

[0004] Therefore, in engineering practice, a new technical solution that breaks through the traditional construction sequence is urgently needed. The core requirement is: through the post-installation construction method, after the floor slab concrete is poured and reaches the design strength, the target parameters of TMD are accurately designed based on the measured dynamic characteristic parameters (such as frequency, vibration mode, damping ratio) to ensure that the dynamic characteristics of the two match. Summary of the invention

[0005] The purpose of the present invention is to solve the problems in the prior art and to provide a construction method and a construction device for a rear-mounted frequency-tuned mass damper.

[0006] In order to achieve the above object, the present invention provides a construction method of a post-installed frequency-tuned mass damper, comprising the following steps:

[0007] Step 1: In the stage of tying the floor reinforcement, pre-embed the lifting rings, and then pour the floor concrete;

[0008] Step 2: After the floor slab concrete reaches the design strength, the dynamic characteristics of the floor slab are tested, and the target parameters of the tuned mass damper are corrected based on the measured data to complete the customized production;

[0009] Step 3: Assembling the tuned mass damper and the platform beam on the supporting floor below the floor slab;

[0010] Step 4: Hang the upper hook of the hoist on the lifting ring, and hang the lower hook on the lifting lug on the platform beam;

[0011] Step 5: Lift the platform beam to the designed installation position;

[0012] Step 6: Connect the platform beams to the structural beams.

[0013] Furthermore, in step 1, if the structural beam is a concrete beam, embedded parts are installed at the bottom or side of the structural beam according to the installation position of the platform beam.

[0014] Further, in step 1, the installation position of the lifting ring is one of the projection of the center position of the tuned mass damper and the projection of the two sides of the tuned mass damper.

[0015] Furthermore, in step 3, it specifically includes:

[0016] Step 3.1: Arrange the two platform beams opposite to each other on the supporting floor so that the lifting ears on the platform beams face inwards;

[0017] Step 3.2: placing the tuned mass damper on the two platform beams, wherein the two platform beams are arranged symmetrically with respect to the center line of the tuned mass damper;

[0018] Step 3.3: The frequency-tuned mass damper and the platform beam are connected by welding, bolting or bolt welding.

[0019] Further, in step 5, if the platform beam is installed on the lower side or side of the structural beam, it specifically includes:

[0020] Step 5.1: The platform beam and the tuned mass damper combination are placed at the projection of the installation position on the supporting floor;

[0021] Step 5.2: Lift the platform beam and tuned mass damper combination by the hoisting hoist so that the top of the platform beam is butted against the bottom of the structural beam or the end of the platform beam is butted against the side of the structural beam.

[0022] Further, in step 5, if the cross-section of the structural beam is an I-shaped beam, and the platform beam is installed within the height range of the structural beam, the method specifically includes:

[0023] Step 5.1: The platform beam and the tuned mass damper combination are placed at a vertical position of the projection of the installation position on the supporting floor;

[0024] Step 5.2: lifting the platform beam and the tuned mass damper combination by the hoisting hoist so that the bottom of the platform beam is higher than the upper surface of the lower flange of the structural beam;

[0025] Step 5.3: Horizontally rotate the platform beam and the tuned mass damper assembly 90 degrees;

[0026] Step 5.4: Lower the platform beam and tuned mass damper combination by the hoisting hoist so that the bottom of the platform beam is butted against the upper surface of the lower flange or the web of the structural beam.

[0027] Furthermore, in step 6, the platform beam and the structural beam are connected by one of welding, bolting and bolt welding.

[0028] The present invention also provides a construction device using the construction method of the above-mentioned rear-mounted frequency-modulated mass damper, and the construction device includes the lifting ring, the platform beam and the lifting hoist.

[0029] Furthermore, the lifting ears are respectively arranged at both ends of the platform beam, and the lifting ears are arranged on one side of the platform beam.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. Through the post-installation construction method, the dynamic characteristics (frequency, vibration mode, damping ratio) of the floor slab are measured after the concrete is formed, and the stiffness and mass parameters of the TMD are accurately designed based on the measured data, so that the natural frequency of the TMD is close to the main vibration frequency of the floor slab, which significantly improves the vibration reduction efficiency and overcomes the detuning problem caused by the deviation of the theoretical model of the traditional pre-installed TMD.

[0032] 2. Two lifting paths are provided for different building structure beam heights and space limitations. When the structural beam installation height is limited, the vertical lifting direct connection process is adopted; when the structural beam installation height is sufficient, the vertical lifting-rotation composite process is adopted. The two processes can be dynamically switched according to the actual conditions on site, solving the problem of the inadaptability of the traditional pre-installed TMD due to installation space limitations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a front view of the lifting of the first embodiment of the present invention;

[0034] Figure 2for Figure 1 The corresponding side view;

[0035] Figure 3 The embodiment of the present invention is a front view after lifting Figure 1 ;

[0036] Figure 4 for Figure 3 The corresponding side view;

[0037] Figure 5 The embodiment of the present invention is a front view after lifting Figure 2 ;

[0038] Figure 6 The embodiment of the present invention is a front view after lifting Figure 3 ;

[0039] Figure 7 The embodiment of the present invention is a front view after lifting Figure 4 ;

[0040] Figure 8 This is a front view of the lifting of the second embodiment of the present invention;

[0041] Fig. 9 for Figure 8 The corresponding side view;

[0042] Fig.10 It is a front view of the lifting process of the second embodiment of the present invention;

[0043] Fig.11 for Fig.10 The corresponding side view;

[0044] Fig.12 It is a front view after lifting of the second embodiment of the present invention;

[0045] Fig.13 for Fig.12 The corresponding side view;

[0046] Fig.14 It is the installation plan of the present invention;

[0047] Fig.15 The present invention provides a flowchart of a construction method of a post-installed frequency-tuned mass damper according to an embodiment of the present invention.

[0048] In the figure: 1. lifting eye; 2. frequency-tuned mass damper; 3. platform beam; 31. lifting eye; 4. lifting hoist; 5. structural beam; 6. floor slab; 7. supporting floor; 8. embedded parts. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0050] Embodiment 1: Figures 1 to 4 As shown, combined Figures 14 and 15 The embodiment of the present invention provides a construction method of a post-installed frequency-tuned mass damper, which is used to install the frequency-tuned mass damper 2 after the concrete of the floor slab 6 is poured, and includes the following steps:

[0051] Step 1: In the reinforcement binding stage of the floor slab 6, the lifting ring 1 is pre-buried, and then the concrete of the floor slab 6 is poured;

[0052] Step 2: After the concrete of the floor slab 6 reaches the design strength, the dynamic characteristics of the floor slab 6 are tested, and the target parameters of the tuned mass damper 2 are corrected based on the measured data to complete the customized production;

[0053] Step 3: Assemble the tuned mass damper 2 and the platform beam 3 on the supporting floor 7 below the floor slab 6;

[0054] Step 4: Figure 1 As shown, the upper hook of the hoisting hoist 4 is hung on the lifting ring 1, and the lower hook is hung on the lifting ear 31 on the platform beam 3;

[0055] Step 5: Lift the platform beam 3 to the designed installation position;

[0056] Step 6: Connect the platform beam 3 to the structural beam 5.

[0057] Furthermore, in step 1, if the structural beam 5 is a concrete beam, the embedded part 8 is installed at the bottom or side of the structural beam 5 according to the installation position of the platform beam 3 .

[0058] Furthermore, in step 1, the installation positions of the hanging rings 1 are at the projections on both sides of the tuned mass damper 2, and the number of the hanging rings is 2.

[0059] Further, in step 3, if Fig.14 As shown, specifically including:

[0060] Step 3.1: Arrange the two platform beams 3 opposite to each other on the supporting floor 7 so that the lifting ears 31 on the platform beams 3 face inwards;

[0061] Step 3.2: placing the tuned mass damper 2 on the two platform beams 3, and the two platform beams 3 are arranged symmetrically with respect to the center line of the tuned mass damper 2;

[0062] Step 3.3: The frequency-tuned mass damper 2 and the platform beam 3 are connected by welding, bolting or bolt welding.

[0063] Further, in step 5, when the height range of the structural beam 5 is insufficient to install the combination of the platform beam 3 and the tuned mass damper 2, the platform beam 3 can be installed at the lower side of the structural beam 5; when the cross-sectional form of the structural beam 5 is one of a rectangular shape and a box shape, the platform beam 3 can be installed at the side of the structural beam 5, specifically including:

[0064] Step 5.1: Figure 1~2 Said platform beam 3 and tuned mass damper 2 are combined and placed at the projection of the installation position on the supporting floor 7;

[0065] Step 5.2: If Figures 3 to 7 As shown, through 4 groups ( Figures 1 to 7 Only 2 groups are shown schematically.) The hoisting hoist 4 lifts the platform beam 3 and the frequency-tuned mass damper 2 combination so that the top of the platform beam 3 is connected to the bottom of the structural beam 5 or the end of the platform beam 3 is connected to the side of the structural beam 5.

[0066] Furthermore, in step 6, the platform beam 3 and the structural beam 5 are connected by welding, bolting and bolt welding.

[0067] The embodiment of the present invention further provides a construction device using the construction method of the above-mentioned rear-mounted frequency-tuned mass damper, and the construction device includes the lifting ring 1, the platform beam 3 and the lifting hoist 4.

[0068] Furthermore, the lifting ears 31 are respectively provided at both ends of the platform beam 3 , and the lifting ears 31 are provided on one side of the platform beam 3 .

[0069] Embodiment 2: Figures 8 to 13 As shown, combined Figures 14 and 15 The difference between the second embodiment and the first embodiment is that:

[0070] In step 1, the installation position of the lifting ring is at the projection of the center position of the tuned mass damper, and the number of the lifting ring is 1.

[0071] In step 5, when the height range of the structural beam 5 is sufficient to install the combination of the platform beam 3 and the tuned mass damper 2 or there is a requirement for the net height under the structural beam 5, and the cross-section of the structural beam 5 is an I-shape, the platform beam 3 can be installed within the height range of the structural beam 5, specifically including:

[0072] Step 5.1: Figures 8 and 9 As shown, the platform beam 3 and the tuned mass damper 2 are combined and placed at a vertical position of the projection of the installation position on the supporting floor 7;

[0073] Step 5.2: If Figures 10-11 As shown, through 4 groups ( Figures 8 to 13 Only 2 groups are schematically shown) the hoisting hoist 4 lifts the platform beam 3 and the frequency-tuned mass damper 2 combination so that the bottom of the platform beam 3 is higher than the upper surface of the lower flange of the structural beam 5;

[0074] Step 5.3: Horizontally rotate the platform beam 3 and the tuned mass damper 2 combination by 90 degrees;

[0075] Step 5.4: If Figures 12-13 As shown, the platform beam 3 and the tuned mass damper 2 are combined by lowering the hoist 4 so that the bottom of the platform beam 3 is butted against the upper surface of the lower flange or the web of the structural beam 5 .

[0076] In summary, the embodiment of the present invention proposes a construction method and a construction device for a post-installed frequency-modulated mass damper, which effectively solves the inherent defects of the traditional installation method through the innovative combination of post-installed construction and adaptive lifting technology. On the one hand, the TMD parameters are accurately customized based on the measured dynamic characteristics after the floor slab is formed, breaking through the theoretical model limitations of the pre-installed process and realizing the dynamic matching of the vibration reduction system and the building body; on the other hand, through the flexible switching of the dual processes of vertical lifting and rotational lifting, the spatial adaptation problem of complex structural beams is overcome, and the construction efficiency and installation accuracy are significantly improved. This solution takes into account both the optimization of vibration reduction performance and the feasibility of engineering implementation, and provides an innovative technical path for building vibration control.

[0077] The above content is a further detailed description of the technical solution provided in combination with the preferred implementation methods of this patent. It cannot be determined that the specific implementation of the present invention is limited to the above descriptions. For ordinary technicians in the technical field to which this patent belongs, without departing from the concept of this patent, they can also make several simple deductions or substitutions, which should be deemed to fall within the scope of protection of this patent.

Claims

1. A construction method of a post-installed frequency-tuned mass damper, characterized in that: The following steps are involved: Step 1: In the stage of tying the floor reinforcement, pre-embed the lifting rings, and then pour the floor concrete; Step 2: After the floor slab concrete reaches the design strength, the dynamic characteristics of the floor slab are tested, and the target parameters of the tuned mass damper are corrected based on the measured data to complete the customized production; Step 3: Assembling the tuned mass damper and the platform beam on the supporting floor below the floor slab; Step 4: Hang the upper hook of the hoist on the lifting ring, and hang the lower hook on the lifting lug on the platform beam; Step 5: Lift the platform beam to the designed installation position; Step 6: Connect the platform beams to the structural beams.

2. The construction method of a post-installed frequency-tuned mass damper according to claim 1, characterized in that: In step 1, if the structural beam is a concrete beam, embedded parts are installed at the bottom or side of the structural beam according to the installation position of the platform beam.

3. The construction method of a post-installed frequency-tuned mass damper according to claim 1, characterized in that: In step 1, the installation position of the lifting ring is one of the projection of the center position of the tuned mass damper and the projection of the two sides of the tuned mass damper.

4. The construction method of a post-installed frequency-tuned mass damper according to claim 1, characterized in that: In step 3, it specifically includes: Step 3.1: Arrange the two platform beams opposite to each other on the supporting floor so that the lifting ears on the platform beams face inwards; Step 3.2: placing the tuned mass damper on the two platform beams, wherein the two platform beams are arranged symmetrically with respect to the center line of the tuned mass damper; Step 3.3: The frequency-tuned mass damper and the platform beam are connected by welding, bolting or bolt welding.

5. The construction method of a post-installed frequency-tuned mass damper according to claim 1, characterized in that: In step 5, if the platform beam is installed on the lower side or side of the structural beam, it specifically includes: Step 5.1: The platform beam and the tuned mass damper combination are placed at the projection of the installation position on the supporting floor; Step 5.2: Lift the platform beam and tuned mass damper combination by the hoisting hoist so that the top of the platform beam is butted against the bottom of the structural beam or the end of the platform beam is butted against the side of the structural beam.

6. The construction method of a post-installed frequency-tuned mass damper according to claim 1, characterized in that: If the cross-section of the structural beam is an I-shaped beam, and the platform beam is installed within the height range of the structural beam, the method specifically includes: Step 5.1: The platform beam and the tuned mass damper combination are placed at a vertical position of the projection of the installation position on the supporting floor; Step 5.2: lifting the platform beam and the tuned mass damper combination by the hoisting hoist so that the bottom of the platform beam is higher than the upper surface of the lower flange of the structural beam; Step 5.3: Horizontally rotate the platform beam and the tuned mass damper assembly 90 degrees; Step 5.4: Lower the platform beam and tuned mass damper combination by the hoisting hoist so that the bottom of the platform beam is butted against the upper surface of the lower flange or the web of the structural beam.

7. The construction method of a post-installed frequency-tuned mass damper according to claim 1, characterized in that: In step 6, the platform beam and the structural beam are connected by one of welding, bolting and bolt welding.

8. A construction device using the construction method of a post-installed frequency-tuned mass damper according to any one of claims 1 to 7, characterized in that: The construction device comprises the lifting ring, the platform beam and the lifting hoist.

9. The construction device according to claim 8, characterized in that: The lifting ears are respectively arranged at both ends of the platform beam, and the lifting ears are arranged on one side of the platform beam.

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