SPD superimposed prestressed concrete rectangular hollow floor slab with band gap vibration isolation characteristic

Abstract

The utility model relates to the technical field of fabricated building structures, and discloses an SPD superimposed prestressed concrete rectangular hollow floor slab with a gap vibration isolation characteristic, which comprises a concrete layer and an SPD slab layer, a high-strength reinforcing mesh is arranged in the SPD slab layer, and the SPD slab layer is provided with periodic rectangular holes. The floor can effectively isolate vibration in a specific frequency range and improve the comfort of a building, and compared with a traditional floor, the floor has the obvious advantages that the obvious vibration isolation effect is achieved, through the band gap effect design, the floor can effectively prevent vibration propagation of a specific frequency band, and the vibration isolation effect is good; particularly, a relatively good isolation effect is achieved on high-frequency vibration; the hollow structure not only reduces the dead weight of the floor slab, but also has excellent performance in the aspects of temperature control and energy conservation; heat is effectively isolated through the design of the hollow slabs, and building energy consumption is reduced; and the anti-seismic performance is improved, and the anti-seismic performance of the floor slab is enhanced through optimized pre-stressed steel bar configuration.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fabricated building structure, concretely to a SPD composite prestressed concrete rectangular hollow floor with band gap vibration isolation characteristics, aims at realizing effective vibration isolation and noise reduction function in building structure through optimizing the hole design and material selection of unit cell. BACKGROUND

[0002] As an efficient, environmentally friendly and energy-saving building method, fabricated building plays an increasingly important role in future construction. As an important load-bearing component in fabricated building, the efficiency of design and construction of composite floor slab is crucial to improving the overall performance of the building.

[0003] Most existing composite floor slabs use the combination structure of traditional prestressed concrete hollow slab (SP slab) and post-cast concrete composite layer. This structure, while ensuring strength and stiffness, reduces self-weight and energy consumption through hollow design. However, the transverse vibration isolation effect of traditional composite floor slabs is limited, especially in applications requiring higher vibration isolation performance, periodic structures with band gap characteristics have not been fully applied.

[0004] Band gap is a material structure that achieves the effect of suppressing or isolating specific frequency vibrations through periodic arrangement. Although band gap effect has been widely studied in materials science, its application in fabricated composite floor slabs, particularly in effective vibration isolation, is still in the exploratory stage.

[0005] Therefore, the utility model provides a SPD composite prestressed concrete rectangular hollow floor slab with band gap vibration isolation characteristics, the core technology of which is to optimize the vibration isolation performance of the composite floor slab by designing a band gap structure. SUMMARY

[0006] The utility model aims to provide a SPD composite prestressed concrete rectangular hollow floor slab with band gap vibration isolation characteristics, which enhances the vibration isolation performance of the floor slab by adding a periodic rectangular hole design, especially in a specific frequency range, effectively isolating vibrations.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a SPD composite prestressed concrete rectangular hollow floor slab with band gap vibration isolation characteristics, comprising a concrete layer and a SPD slab layer, the SPD slab layer has a high-strength steel mesh inside, and the SPD slab layer has a periodic rectangular hole.

[0008] Preferably, the rectangular hole has a width of 50mm, a height of 80mm, and a radius of 3mm, and the holes are spaced 89cm apart.

[0009] Preferably, the concrete layer is composed of 60mm thick C35 concrete.

[0010] Preferably, the high-strength steel mesh adopts HRB400 prestressed steel.

[0011] The utility model provides a kind of SPD composite prestressed concrete rectangular hollow floor with band gap vibration isolation characteristics.It has the following beneficial effects:

[0012] (1), the utility model can effectively isolate vibration in specific frequency range, improve the comfort of building.Compared with traditional floor, the floor has obvious advantages in the following aspects:

[0013] Significant vibration isolation effect: through band gap effect design, floor can effectively prevent the vibration propagation of specific frequency band, especially for high-frequency vibration has good isolation effect.

[0014] Energy saving and environmental protection: hollow structure not only reduces floor self weight, but also performs well in temperature control and energy saving.Hollow plate design effectively isolates heat, reduces building energy consumption.

[0015] Improve seismic performance: optimized prestressed steel configuration enhances the seismic performance of floor, especially in high-rise building and earthquake zone, can effectively improve the seismic capacity of building.

[0016] High-efficiency construction and low cost: the assembly type design of floor reduces on-site construction time and labor cost, improves construction efficiency and reduces construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the schematic diagram of composite floor unit cell of the utility model;

[0018] Fig. 2 It is the dispersion curve diagram of floor, which shows the vibration isolation characteristics of hole;

[0019] Fig. 3 It is the band gap change diagram of floor under different hole sizes.

[0020] In the figure: concrete layer 1, SPD plate layer 2, rectangular hole 3, high-strength steel mesh 4. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] Examples of the described embodiments are shown in the accompanying drawings, wherein like or similar designations given to like or similar elements or elements with the same or similar function throughout the several views. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application.

[0023] The preferred embodiment of the rectangular hollow floor slab with band gap vibration isolation characteristics provided by the present application is shown in the accompanying drawings, wherein like or similar designations given to like or similar elements or elements with the same or similar function throughout the several views. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application. Figs. 1-3 The preferred embodiment of the rectangular hollow floor slab with band gap vibration isolation characteristics provided by the present application is shown in the accompanying drawings, wherein like or similar designations given to like or similar elements or elements with the same or similar function throughout the several views. The embodiments described below are exemplary and are intended to be illustrative of the present application and are not to be construed as limiting the present application.

[0024] Further, the hollow structure design: the hollow slab (SP plate) unit cell adopts a rectangular hole design, the hole width is 50mm. The height is 80mm, and the holes are arranged periodically to produce a band gap, so that the floor can effectively isolate vibrations in a specific frequency range. In order to facilitate processing, the four corners of the rectangle are also rounded, adding a radius of 3mm.

[0025] Further, the composite layer design: the composite layer adopts C35 concrete, the thickness is 60mm, the composite layer and the hollow slab form a whole through strong adhesion, and bear force together, enhancing the stability and seismic performance of the structure.

[0026] Further, the prestressed steel bar design: the SP plate and the composite layer are provided with a high-strength steel bar net 4 inside, which ensures the bending and shearing mechanical properties of the floor. At the same time, the configuration design of the steel bar optimizes the seismic performance of the floor, especially suitable for building structures with high seismic requirements.

[0027] Band gap effect optimization: by reasonably designing the hole size and arrangement of the hollow slab, the periodic characteristics of the floor are optimized, and obvious band gap effect is produced. The band gap effect can effectively block vibrations in a specific frequency range, such as bending waves and compression waves, reducing the impact of vibration on the interior of the building.

[0028] Vibration reduction and energy saving: the hollow structure effectively reduces the self weight of the floor, reducing the overall energy consumption of the building; and the band gap effect not only optimizes the vibration isolation effect, but also reduces the propagation of noise.

[0029] The utility model also considers the influence of different hole layout on band gap characteristic, finds that the periodicity of hole arrangement has remarkable influence on band gap effect through simulation analysis. The size of hole is adjusted, can optimize the vibration isolation performance, the bigger hole is, the bigger vibration isolation band gap is, and the lower action frequency is.

[0030] Material and mechanics parameter

[0031] C35 concrete: density 2320 kg / m3, elastic modulus 31500 MPa, poisson's ratio 0.3.

[0032] Steel bar: density 7850 kg / m3, elastic modulus 20600 MPa, poisson's ratio 0.2.

[0033] SP board material: adopt prestressed reinforced concrete, guarantee the bending and shear capacity of floor.

[0034] Scope of application

[0035] The SPD superimposed prestressed concrete hollow floor of the utility model is applicable to the building structure needing efficient vibration isolation and anti-seismic, especially in high-rise building, bridge, airport, subway and the like with higher vibration control requirement.

[0036] Finally, it should be pointed out that: the foregoing is only preferred embodiment of the utility model, and is not used for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiment, for the person skilled in the art, still can modify the technical scheme recorded in foregoing each embodiment, or equivalent replacement to part technical feature. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A prestressed concrete rectangular hollow floor slab with gap vibration isolation characteristics, comprising a concrete layer (1) and an SPD slab layer (2), characterized in that, The SPD plate (2) is provided with a high-strength steel mesh (4) inside, and the SPD plate (2) has periodic rectangular holes (3).

2. The SPD composite prestressed concrete rectangular hollow floor slab with gap vibration isolation characteristics according to claim 1, characterized in that: The rectangular hole (3) is 50mm wide and 80mm high, with a rounded corner of 3mm radius, and the holes are spaced 89cm apart.

3. The SPD composite prestressed concrete rectangular hollow floor slab with gap vibration isolation characteristics according to claim 1, characterized in that: The concrete layer (1) is superimposed with 60mm thick C35 concrete.

4. The SPD composite prestressed concrete rectangular hollow floor slab with gap vibration isolation characteristics according to claim 1, characterized in that: The high-strength steel mesh (4) is made of HRB400 prestressed steel.

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