Reinforced concrete vibration resistant floor

Abstract

The present application relates to a kind of reinforced concrete anti-vibration floor, the reinforced concrete anti-vibration floor includes transition deformation body and be arranged in the transition deformation body, the resonant vibration power unit includes power body, spring plate and spring plate support, the power body includes two parts by the spring plate is connected, the spring plate is supported in the transition deformation body by the spring plate support, the number of the resonant vibration power unit is not less than two.Compared with prior art, the present application utilizes the structural dynamics frequency modulation power damping vibration reduction principle to control the resonance vibration peak of floor, utilizes the multi-mode broadband characteristics of floor and arranges resonant vibration power unit in the longitudinal direction of floor, forms wide frequency band high anti-vibration floor, can cover frequency band 1-80Hz, with more effective, more economic and long service life advantage.

Description

Technical Field

[0001] This invention relates to the field of civil engineering construction, and in particular to a reinforced concrete vibration-resistant floor slab. Background Technology

[0002] When subway trains enter and exit the depot for routine parking and periodic maintenance, the tracks within the area split from two into dozens of branches, thus traversing a section with numerous branch lines—the throat area. Here, the track is curved, there are many track joints, and the train speed is relatively high, resulting in significant vibrations. Furthermore, new trains and trains that have undergone maintenance also experience high speeds during system debugging and performance testing on the test track, generating substantial vibrations. These vibrations have a wide peak frequency range, primarily between 20-80Hz. These vibrations propagate to the buildings above via the track bed, columns, and cover plates. Since the columns and cover plates are made of reinforced concrete, their rigid connections directly transmit vibrations. The relatively low structural damping and slow vibration attenuation cause vibrations in the structure and its components. Although these vibrations differ from the intense vibrations experienced by buildings under earthquake conditions, train-induced vibrations generally do not pose a structural safety problem. However, the vibrations they cause to the buildings often cause discomfort to those working and living within the buildings, affecting work efficiency and quality of life, thereby reducing the building's comfort performance. For example, if appropriate vibration isolation measures are not taken for the depot track system, when the train passes through the throat area at a speed of only 10-20 km / h, the ground vibration of the residential building directly above it may be as high as 85 dB or more, far exceeding the environmental protection requirement of 62-75 dB (the limit varies in different areas and at different times).

[0003] In the prior art, patent CN115045551A discloses a precast reinforced concrete vibration-resistant floor slab. Considering the dynamic response and external excitation characteristics of the building floor, it directly improves the floor's vibration resistance at vibration-sensitive points through structural design optimization. This is achieved by directly reducing the vibration level of the building floor through resonant dynamic damping units and collision damping units within the precast reinforced concrete floor slab. However, in this scheme, the collision damping units are filled with damping particles. Over time, the relative positions of the particle gaps change due to vibration, resulting in mutual filling and overall subsidence. This reduces the effectiveness of the collision damping units, thus causing the vibration-resistant floor slab to have a short service life. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a reinforced concrete vibration-resistant floor slab.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A reinforced concrete vibration-resistant floor slab includes a transition deformation body and a resonant power unit disposed in the transition deformation body. The resonant power unit includes a power body, a spring plate, and a spring plate support. The power body includes two parts connected by the spring plate. The spring plate is supported in the transition deformation body by the spring plate support. The number of resonant power units is not less than two.

[0007] Preferably, both the spring plate and the power body are separated from the reinforced concrete vibration-resistant floor slab.

[0008] Preferably, the resonant power unit is distributed longitudinally along the slab within the reinforced concrete vibration-resistant floor slab.

[0009] Preferably, the number of the resonant power units is greater than or equal to three, and they are arranged sequentially in the reinforced concrete vibration-resistant floor slab.

[0010] Preferably, the spring plates comprise a plurality of spring plates arranged in sequence, all of which are connected between the two parts of the power body.

[0011] Preferably, the spring plate support comprises a plurality of spring plates arranged in sequence.

[0012] Preferably, the spring plate is made of metal.

[0013] Preferably, the material of the spring plate support is concrete.

[0014] Preferably, the material of the power body is concrete.

[0015] Preferably, the material of the transition deformable body is foam.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This invention addresses the source of track vibration transmission to the superstructure caused by train entry and exit from the depot and test track operation. By controlling the vibration energy of the support columns of the cover plate near the track bed, it significantly reduces the requirements, complexity, and additional maintenance work of track bed vibration isolation measures. It prioritizes or focuses on controlling the vibration level from the source of vibration excitation propagation in the superstructure's support columns. Through the transition deformation body and resonant dynamic unit installed within the reinforced concrete vibration-resistant floor slab, the vibration level of the floor slab in the building can be effectively reduced. Simultaneously, it avoids the phenomenon of damping particles filling each other after prolonged use, which could lead to overall subsidence, reduce the effectiveness of the collision damping unit, and extend the service life of the vibration-resistant floor slab. This vibration-resistant floor slab has the advantages of being more effective and economical.

[0018] 2. Under the condition of variable train speed in the depot, the track vibration frequency is a wide range. Vibration control technology needs to cover a wide frequency range. At the same time, the distribution of tracks and buildings in the depot is complex. Vibration excitation in different locations and directions will affect the ground vibration inside the building, as well as the secondary noise radiated by the vibration of different structures of the building, including the floor, walls, and ceiling. The multi-stage multi-dimensional dynamic damping device of this invention is characterized by being a wide-band dynamic damping vibration reduction device that can cover the frequency band of 1-80Hz, which effectively solves the existing problems.

[0019] 3. The structure of this invention avoids the problem of short lifespan caused by the sinking of damping particles in existing reinforced concrete vibration-resistant floor slabs, and can achieve long-term vibration reduction effect.

[0020] 4. The present invention has a simple structure and is easy to implement. It can be directly applied to existing precast reinforced concrete floor slabs or introduced directly into new designs. Attached Figure Description

[0021] Figure 1 This is a side cross-sectional view of the structure of the present invention;

[0022] Figure 2 This is a top cross-sectional view of the structure in Example 1;

[0023] Figure 3 This is a top cross-sectional view of the structure in Example 2;

[0024] Figure 4 This is a top cross-sectional view of the structure in Example 3;

[0025] Figure 5 This is a top cross-sectional view of the structure in Example 4.

[0026] Reference numerals in the attached drawings: 1. Reinforced concrete vibration-resistant floor slab; 2. Spring plate; 3. Spring plate support; 4. Dynamic body; 5. Transitional deformation body. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are based on the technical solution of the present invention and provide detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0028] Example 1

[0029] like Figure 1As shown, a reinforced concrete vibration-resistant floor slab 1 includes a transition deformation body 5 and a resonant dynamic unit disposed within the transition deformation body 5. The resonant dynamic unit includes a dynamic body 4, a spring plate 2, and a spring plate support 3. The dynamic body 4 comprises two parts connected by the spring plate 2, which is supported in the transition deformation body 5 by the spring plate support 3. The number of resonant dynamic units in the reinforced concrete vibration-resistant floor slab 1 is not less than two.

[0030] The resonant frequency of existing building structural floors is approximately in the range of 10-80Hz. Due to external excitations (such as when a subway passes under the building), the building floor experiences strong vibrations, the vibration level of which exceeds the requirements for human comfort (environmental protection limits), especially in the sensitive frequency range. This invention employs a resonant system designed with beam bending modes. The core of this system is to control the peak resonant vibration of the floor slab using the principle of frequency-modulated dynamic damping in structural dynamics. By utilizing the multimodal broadband characteristics of the floor slab, resonant dynamic units are arranged longitudinally in the floor slab to form a broadband, highly vibration-resistant floor slab.

[0031] In this embodiment, the demolding "empty tube" of the formwork in a conventional precast reinforced concrete floor slab is replaced with a resonant dynamic unit. The resonant dynamic unit is cast integrally with the floor slab. The spring plate 2, spring plate support 3, and dynamic body 4 can be precast or fabricated together with the reinforced concrete vibration-resistant floor slab 1. The transition deformation body 5 is placed during the pouring of the floor slab to ensure that the reinforced concrete vibration-resistant floor slab 1 is separated from the spring plate 2 and dynamic body 4. The transition deformation body 5 needs to have a certain rigidity to ensure that no large deformation occurs under static loads during construction. Materials such as foam can be used. Once fabricated, the transition deformation body 5 undergoes compression under dynamic loads, resulting in permanent deformation, and no longer contacts the dynamic body 4, ensuring that the resonant frequency formed by the designed spring plate 2 and dynamic body 4 is not affected by the transition deformation body 5.

[0032] In this embodiment, the spring plate 2 can be made of metal, the power body 4 can be made of concrete, and the spring plate support 3 can be made of concrete. By selecting spring plates 2 with different stiffnesses and power bodies 4 with different masses, resonant power units with different frequencies can be formed.

[0033] In this embodiment, as Figure 2 As shown, the reinforced concrete vibration-resistant floor slab 1 is provided with two longitudinally arranged resonant power units. The two resonant power units have different resonant frequencies, namely 30Hz and 50Hz, and can also be designed with other resonant frequency combinations. In each resonant power unit, the two parts of the power body 4 are each a whole, distributed along the long side of the reinforced concrete vibration-resistant floor slab 1, and connected in the middle by a spring plate 2. The long strip-shaped spring plate support 3 is supported in the middle of the spring plate 2. The spring plate 2 and the spring plate support 3 are both whole units extending longitudinally along the reinforced concrete vibration-resistant floor slab 1.

[0034] Example 2

[0035] like Figure 3 As shown, in this embodiment, the basic structure of the reinforced concrete vibration-resistant floor slab 1 is the same as that in Embodiment 1.

[0036] The difference lies in the fact that in each resonant power unit, the spring plate 2 is not a single unit, but rather comprises multiple spring plates arranged sequentially, all connected between the two parts of the power body 4. This allows for the creation of combinations of spring plates 2 with varying overall stiffness, even with only one type of spring plate 2, through parallel arrangement of different numbers, thus enhancing design flexibility.

[0037] Example 3

[0038] like Figure 4 As shown, in this embodiment, the basic structure of the reinforced concrete vibration-resistant floor slab 1 is the same as that in Embodiment 1.

[0039] The difference lies in the fact that in each resonant dynamic unit, the spring plate support 3 is not a single unit, but rather comprises multiple supports arranged sequentially. This ensures the function of supporting the spring plate 2 while allowing for the provision of reinforced concrete vibration-resistant floor slabs 1 of varying weights by changing the number of spring plate 2 supports.

[0040] Example 4

[0041] like Figure 5 As shown, in this embodiment, the basic structure of the reinforced concrete vibration-resistant floor slab 1 is the same as that in Embodiment 1.

[0042] The difference lies in the number of resonant power units: there are three or more, arranged sequentially in the reinforced concrete vibration-resistant floor slab 1. In each resonant power unit, both parts of the power body 4 are relatively short, connected in the middle by a spring plate 2 with a width no greater than that of the power body 4, and the middle part of the spring plate 2 is supported by a spring plate support 3. In this embodiment, all resonant power units in the reinforced concrete vibration-resistant floor slab 1 can have different resonant frequencies, or they can include resonant power units with the same resonant frequency. Because spring plates 2 with different stiffnesses and power bodies 4 with different masses can form resonant power units with different frequencies, this embodiment can realize a combination of more resonant power units with different resonant frequencies, but the manufacturing process will be more complex.

[0043] This invention can significantly reduce the low-frequency 1-80Hz wideband multi-peak vibration of the column under the vehicle excitation cover in the depot, and effectively control the vibration level from the source of vibration excitation propagation of the building on the cover.

[0044] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A reinforced concrete vibration resistant floor panel, characterized in that, The reinforced concrete anti-vibration floor slab (1) includes a transition deformation body (5) and a resonant power unit disposed in the transition deformation body (5). The resonant power unit includes a power body (4), a spring plate (2) and a spring plate support (3). The power body (4) includes two parts connected by the spring plate (2). The spring plate (2) is supported in the transition deformation body (5) by the spring plate support (3). The number of resonant power units is not less than two. The spring plate (2) and the power body (4) are both separated from the reinforced concrete anti-vibration floor slab (1). The transition deformation body (5) is configured to bear static load during construction and undergo permanent deformation under dynamic load during use to detach from the power body (4).

2. A reinforced concrete vibration resistant floor slab as claimed in claim 1, wherein, The resonant dynamic unit is distributed longitudinally along the slab within the reinforced concrete vibration-resistant floor slab (1).

3. A reinforced concrete vibration resistant floor slab as claimed in claim 2, characterised in that, The number of resonant power units is greater than or equal to three, and they are arranged sequentially in the reinforced concrete anti-vibration floor slab (1).

4. A reinforced concrete vibration-resistant floor slab according to claim 1, characterized in that, The spring plate (2) comprises a plurality of spring plates arranged in sequence, all of which are connected between two parts of the power body (4).

5. A reinforced concrete vibration-resistant floor slab according to claim 1, characterized in that, The spring plate support (3) comprises multiple spring plates arranged in sequence.

6. A reinforced concrete vibration-resistant floor slab according to claim 1, characterized in that, The spring plate (2) and the spring plate support (3) extend longitudinally along the reinforced concrete anti-vibration floor slab (1).

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