A concrete modular building that enhances seismic performance and sound insulation effect simultaneously

Abstract

The present invention discloses a concrete modular building that simultaneously enhances seismic performance and sound insulation effect, including concrete module units. The concrete module units are composed of vertical members, precast beams, roof slabs, floor slabs, and partition walls. The partition walls include precast structural columns and integrally formed lightweight wallboards or ALC lightweight wallboards arranged on the sides of the precast structural columns. The precast structural columns are precast together with the remaining precast parts of the concrete module units. The upper end of the precast structural column is connected to the precast beam, and the lower end side of the precast structural column is connected to the floor slab. A precast cushion block added on-site is provided between the lower end surface of the precast structural column and the top surface of the lower-layer concrete module unit. The bearing capacity of the precast cushion block is lower than the bearing capacity of the precast structural column itself. A flexible cushion layer is provided between the upper and lower concrete module units. The present invention can ensure that the overall stiffness of the concrete module unit is not too large, making its earthquake resistance stronger.

Description

Technical Field

[0001] The present invention relates to the field of concrete modular buildings, and particularly to a concrete modular building that enhances seismic performance and sound insulation effect simultaneously. Background Art

[0002] Traditional building methods have problems such as large construction volume, high resource consumption, high emissions, and high labor demand. Modular building is a building form in which prefabricated modular units are manufactured in a factory and then transported to the site for assembly. Modular buildings have the advantages of fast construction speed, good project quality, less labor consumption, energy conservation and environmental protection.

[0003] Modular buildings are divided into types such as steel structure modular buildings and concrete modular buildings. Among them, the overall materials of concrete modular buildings are basically concrete, which has good fire resistance and heat insulation performance. Its large mass and stiffness make the modular buildings of concrete structure have higher living comfort, and are suitable for hotels, residential buildings and apartment buildings.

[0004] However, the current concrete modular buildings still have the following problems: (1) The concrete module units of concrete modular buildings are relatively heavy, which requires higher transportation and hoisting capabilities, restricting their application in high-rise buildings; (2) To facilitate factory production and reduce the weight of concrete module units, the existing concrete module units often adopt a one-time cast lightweight integral partition wall. Especially for the production of large-volume integral partition walls, the cumbersome masonry process of traditional lightweight slab materials or block materials is omitted, simplifying the construction process. However, this results in a relatively large overall structural stiffness of the concrete module unit, increasing the seismic force of the overall structure and further increasing the construction cost of the building; (3) According to the requirements of the existing national seismic code, construction columns should be set as needed in the middle of partitions with large spacing and around door and window openings. The traditional method of construction columns is to pour them after the main structure construction is completed. In concrete modular buildings, the construction columns are poured together with the main structure. During the construction of concrete modular buildings, since the load-bearing members of the main structure have to wait for the post-poured concrete and the grouting material to harden before they can bear the load, the construction columns in the existing concrete modular buildings have to bear part of the module self-weight and construction load, making the force-bearing mode of the construction columns in the modular structure quite different from that of the traditional structure. All of these are urgent problems to be solved when the current concrete modular buildings are applied to high-rise buildings.

[0005] In addition, the upper and lower layers of the existing concrete modular buildings are directly superimposed together, and the sound insulation effect is poor, resulting in the lower layer environment being often affected by the sound from the upper layer, affecting the living experience. Summary of the Invention

[0006] The purpose of the present invention is to provide a concrete modular building that enhances seismic performance and sound insulation effect simultaneously.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] A concrete modular building that simultaneously enhances seismic performance and sound insulation effect, comprising concrete module units. The concrete module units are composed of vertical members, precast beams, roof slabs, floor slabs, and partition walls. It is characterized in that: the partition wall includes precast construction columns and integrally formed lightweight wallboards or ALC lightweight wallboards (ALC (autoclaved lightweight aerated concrete) refers to autoclaved lightweight aerated concrete) provided on the sides of the precast construction columns. The precast construction columns and the precast parts of the concrete module units are precast in the factory. The upper end of the precast construction column is connected to the precast beam, the lower end side of the precast construction column is connected to the floor slab, and a precast cushion block added at the construction site is provided between the lower end surface of the precast construction column and the top surface of the lower-layer concrete module unit. The bearing capacity of the precast cushion block is lower than the bearing capacity of the precast construction column itself; at the same time, a flexible cushion layer is provided between the upper and lower concrete module units of the concrete modular building.

[0009] A further technical solution of the present invention is that the bearing capacity of the precast cushion block is f c1 A1, and the following formula needs to be satisfied:

[0010] ;

[0011] In the formula:

[0012] N s - Design value of the axial force of the precast construction column under construction load;

[0013] - Stability coefficient of the reinforced concrete axially compressed member, taken according to the "Code for Design of Concrete Structures" GB 50010-2010;

[0014] f c1 - Design value of the axial compressive strength of the precast cushion block concrete;

[0015] f c2 - Design value of the axial compressive strength of the precast construction column concrete;

[0016] f y - Design value of the tensile strength of the longitudinal reinforcement of the precast construction column;

[0017] A1 - Cross-sectional area of the precast cushion block;

[0018] A2 - Cross-sectional area of the precast construction column;

[0019] A s - Cross-sectional area of the longitudinal reinforcement of the precast construction column.

[0020] A further technical solution of the present invention is that a flexible cushion layer is provided between the bottom plate and the top plate of the upper and lower concrete module units, and no flexible cushion layer is provided between the vertical members of the upper and lower concrete module units and between the precast structural columns of the upper and lower concrete module units.

[0021] A further technical solution of the present invention is that the thickness of the flexible cushion layer is generally 10 mm to 25 mm, and the thickness of the flexible cushion layer can also be adjusted according to the requirements of the specific project for the sound insulation performance.

[0022] A further technical solution of the present invention is that the material of the flexible cushion layer can be a flexible material with good sound insulation performance such as EPDM rubber (EPDM rubber refers to ethylene propylene diene monomer rubber).

[0023] A further technical solution of the present invention is that the precast structural column is provided with vertical steel bars and stirrups, and the upper end of the vertical steel bars is anchored into the precast beam.

[0024] A further technical solution of the present invention is that the top plate is a composite floor slab or a fully precast slab with partial post-casting.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The partition wall of the present invention adopts the structure of precast structural columns plus integrally formed lightweight wall panels or ALC lightweight wall panels, with a small weight, reducing the requirements for transportation and hoisting. At the same time, the precast structural columns are not connected to the lower concrete module units, but are temporarily supported on the construction site through precast cushion blocks, and the bearing capacity of the precast cushion blocks is much lower than the bearing capacity of the precast structural columns themselves. In this way, after the cast-in-place concrete and the grouting material of the main structure of the concrete modular building reach the design strength, the precast structural columns basically withdraw from the vertical load borne during construction, which can not only ensure that under the action of an earthquake, the precast cushion blocks under the precast structural columns can be damaged prior to the precast structural columns, so that the precast structural columns will not transfer vertical force or only transfer a very small vertical force to the lower concrete module units, and the overall structural stiffness of the concrete modular building will not be affected by the stiffness of the partition wall and cause the overall building to bear a large earthquake force.

[0027] Since the precast structural columns of the present invention are not connected to the lower concrete module units, the precast structural columns will not participate in the calculation of the overall structural stiffness and seismic action. Under the action of an earthquake, the structural members mainly resisting lateral forces will resist the overall earthquake force of the concrete modular building, making the force transmission path of the overall structure of the concrete modular building simple and efficient, and the actual force characteristics of the structural members in the concrete modular building more consistent with the design analysis and simulation, so that the concrete modular building of the present invention has better seismic resistance.

[0028] The prefabricated construction columns of the present invention are prefabricated in the factory together with the prefabricated parts of the concrete module units, solving the problem that the traditional partition wall construction columns need to be cast-in-place on site, resulting in the inability to complete the overall decoration integration of the concrete module units in the factory.

[0029] 2. At the same time, the present invention is provided with a flexible cushion layer between the upper and lower concrete module units, while no flexible cushion layer is provided between the vertical members and between the prefabricated construction columns. This design greatly enhances the sound insulation performance between the upper and lower concrete module units on the basis of not weakening the seismic performance of the structure, improving the living comfort of the concrete modular building.

[0030] 3. The present invention further provides a formula for the bearing capacity that the precast cushion blocks need to meet, which can better ensure that the precast cushion blocks will not be crushed under the action of construction loads, thus ensuring that the partition walls of the concrete module units do not crack or deform; at the same time, it can better ensure that under the action of an earthquake, the precast cushion blocks are damaged before the precast construction columns, weakening the influence of the precast construction columns and the partition walls on the overall structural stiffness, reducing the natural vibration period and horizontal displacement of the overall structure under the action of an earthquake, and improving the seismic performance and building quality of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a partial plan view of the modular building according to Embodiment 1 of the present invention;

[0032] Figure 2 is Figure 1 the sectional view at 1-1 in

[0033] Figure 3 is Figure 1 the sectional view at 2-2 in

[0034] Figure 4 is Figure 1 the sectional view at 3-3 in

[0035] Figure 5 is the sectional view at 3-3 of the modular building according to Embodiment 2 of the present invention.

[0036] Meanings of the reference numerals in the drawings:

[0037] 100 - concrete module unit; 101 - vertical member; 102 - prefabricated construction column; 1021 - vertical steel bar; 1022 - stirrup; 103 - ALC lightweight wallboard; 104 - bottom plate; 105 - fully prefabricated slab; 1051 - precast slab cast-in-place area; 106 - flexible cushion layer; 107 - prefabricated beam; 1071 - beam cast-in-place layer; 108 - connection gap; 109 - precast cushion block; 110 - sealing rubber strip; 111 - precast floor slab; 112 - cast-in-place concrete layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The present invention will be further described below in conjunction with embodiments.

[0039] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0040] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0041] In the description of the present invention, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0042] Embodiment 1:

[0043] As Figure 1 shown, the concrete modular building that simultaneously enhances the seismic performance and sound insulation effect in this embodiment includes a plurality of concrete module units 100 ( Figure 1 only a part of the modular building is shown in the figure, and the concrete module units 100 in the figure are symmetric about the left and right), and the concrete module units 100 are prefabricated in the factory and then spliced together on site. The plurality of concrete module units 100 can be stacked upwards to more than two floors.

[0044] The concrete module unit 100 is composed of a vertical member 101, a precast beam 107, a top plate, a bottom plate 104 and a partition wall. The vertical member 101 in this embodiment is a precast shear wall. The end of the precast beam 107 is connected to the upper end of the vertical member 101, and the steel bars of the precast beam 107 are anchored into the vertical member 101. The top plate and the bottom plate 104 are arranged at the top and bottom of the concrete module unit, and the partition wall is arranged below the precast beam 107. A hexahedron shape is enclosed by the vertical member 101, the precast beam 107, the top plate, the bottom plate 104 and the partition wall.

[0045] The partition wall includes a precast structural column 102 and an ALC lightweight wall panel 103 provided on the side of the precast structural column 102. The precast structural column 102 and the remaining precast parts of the concrete module unit 100 (the remaining precast parts include the vertical member 101, the precast beam 107, the precast part of the roof slab, and the floor slab 104) are precast in the factory together, solving the problem that the structural columns of the traditional partition wall need to be post-cast on site, resulting in the inability to complete the overall decoration integration of the concrete module unit 100 in the factory.

[0046] In another embodiment, the ALC lightweight wall panel 103 can also be replaced by an integrally formed lightweight wall panel, and the integrally formed lightweight wall panel is precast together with the precast parts of the concrete module unit 100 in the factory.

[0047] As Figure 3 shown, the upper end of the precast structural column 102 is connected to the precast beam 107, the lower end side of the precast structural column 102 is connected to the floor slab 104, and the lower end surface of the precast structural column 102 is flush with the lower surface of the floor slab 104. Vertical steel bars 1021 and stirrups 1022 are provided in the precast structural column 102 of this embodiment, and the upper end of the vertical steel bar 1021 passes through the upper end surface of the precast structural column 102 and is anchored into the precast beam 107.

[0048] A precast cushion block 109 is provided between the lower end surface of the precast structural column 102 and the top surface of the lower-layer concrete module unit 100. The precast structural column 102 is not connected to the lower-layer concrete module unit 100 and is only supported by the precast cushion block 109. The material of the precast cushion block 109 can be concrete, etc., and the precast cushion block 109 is fixed at the corresponding position of the precast structural column 102 during on-site construction. The bearing capacity of the precast cushion block 109 should be lower than the bearing capacity of the precast structural column 102 itself. On the one hand, it is necessary to ensure that the precast cushion block 109 will not be crushed under the action of the construction load, so as to ensure that the partition wall of the concrete module unit 100 does not crack or deform. On the other hand, it is also necessary to ensure that under the action of an earthquake, the precast cushion block 109 is damaged earlier than the precast structural column 102, so that the precast structural column 102 will not transfer vertical force or only transfer a very small vertical force to the lower-layer concrete module unit 100, thus ensuring that the overall stiffness of the concrete module unit 100 will not be too large and the earthquake resistance ability will be stronger.

[0049] Among them, the bearing capacity of the precast cushion block 109 is f c1 A1, and the following formula needs to be satisfied:

[0050] ;

[0051] In the formula:

[0052] N s - The design value of the axial force of the precast structural column 102 under the action of the construction load;

[0053] - The stability coefficient of a reinforced concrete axially compressed member shall be adopted in accordance with Table 6.2.15 of the Code for Design of Concrete Structures (GB 50010-2010);

[0054] f c1 - The design value of the axial compressive strength of the precast cushion block concrete;

[0055] f c2 - The design value of the axial compressive strength of the precast construction column concrete;

[0056] f y - The design value of the tensile strength of the longitudinal reinforcement of the precast construction column;

[0057] A1 - The cross-sectional area of the precast cushion block 109;

[0058] A2 - The cross-sectional area of the precast construction column 102;

[0059] A s - The cross-sectional area of the longitudinal reinforcement of the precast construction column.

[0060] The specific content of Table 6.2.15 of the above-mentioned Code for Design of Concrete Structures (GB 50010-2010) is shown in the following table:

[0061] Table 6.2.15 Stability coefficient of a reinforced concrete axially compressed member

[0062]

[0063] Note: 1. l0 is the calculated length of the member;

[0064] 2. b is the short side dimension of the rectangular cross-section, d is the diameter of the circular cross-section, and i is the minimum radius of gyration of the cross-section.

[0065] The partition wall in this embodiment only undertakes the enclosure function in the modular building. The ALC lightweight wall panel 103 therein has good heat insulation, sound insulation and fire resistance performance. The installation method of the ALC lightweight wall panel 103 is the same as that of the ALC partition wall in the traditional prefabricated building. The concrete module unit 100 of this embodiment can realize the integration of interior decoration. After the construction is completed, it can reach the delivery and use standard, effectively shortening the construction period, reducing the labor cost, and significantly improving the efficiency and quality of the modular building.

[0066] This embodiment also provides a flexible cushion layer 106 between the bottom plate 104 and the top plate of the upper and lower concrete module units 100. The flexible cushion layer 106 is laid during on-site construction. The thickness of the flexible cushion layer 106 in this embodiment is the same as that of the precast cushion block 109.

[0067] The preferred thickness of the flexible cushion layer 106 is 10 mm to 25 mm. The flexible cushion layer 106 can enhance the sound insulation performance between the upper and lower concrete module units 100 and improve the living comfort. The material of the flexible cushion layer 106 in this embodiment is a flexible material with good sound insulation performance such as EPDM rubber.

[0068] No flexible cushion layer 106 is provided between the vertical members 101 of the upper and lower concrete module units 100 and between the precast structural columns 102 of the upper and lower concrete module units 100. Of course, the vertical members 101 of the upper and lower concrete module units 100 need to be connected to each other through other connection structures, and the existing structures for connecting the upper and lower shear walls can be adopted. This part is not the content of the present invention, so it will not be elaborated here.

[0069] The top plate adopted in this embodiment is a fully precast plate 105 with partial post-casting, as Figure 3 and Figure 4 shown. The end of the fully precast plate 105 is provided with a precast plate cast-in-place area 1051. The upper surface of the precast beam 107 is provided with a beam cast-in-place layer 1071. Part of the steel bars of the precast beam 107 are located in the beam cast-in-place layer 1071. The beam cast-in-place layer 1071 and the precast plate cast-in-place area 1051 are cast in place on site.

[0070] As Figure 3 and Figure 4 shown, in this embodiment, there are connection gaps 108 between the precast beams 107, between the precast structural columns 102, and between the ALC lightweight wall panels 103 of adjacent concrete module units 100. A sealing rubber strip 110 is arranged at the lower side of the connection gap 108 between the precast beams 107. The connection gap 108 between the precast beams 107 is filled with concrete or grouting material. The connection gaps 108 between the precast structural columns 102 and between the ALC lightweight wall panels 103 are filled with concrete, or grouting material, or not filled.

[0071] Embodiment Two:

[0072] The difference between the concrete modular building in Embodiment Two and that in Embodiment One lies in the top plate of the concrete module unit 100. As Figure 5 shown, the top plate in Embodiment Two is a composite floor slab, which includes a precast floor slab 111 and a cast-in-place concrete layer 112. The cast-in-place concrete layer 112 and the beam cast-in-place layer 1071 are cast in place on site.

[0073] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited thereto. All such modifications, substitutions or changes in various other forms made to the above structure of the present invention according to the above content of the present invention, in accordance with the common general knowledge and customary means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A concrete modular building that simultaneously enhances seismic performance and sound insulation effect, comprising concrete module units, wherein the concrete module units are composed of vertical members, precast beams, roof slabs, floor slabs, and partition walls, and are characterized in that: The partition wall includes precast structural columns and integrally formed lightweight wall panels or ALC lightweight wall panels arranged on the sides of the precast structural columns. The precast structural columns and the precast parts of the concrete module units are precast in a factory. The upper end of the precast structural column is connected to the precast beam, and the lower end side of the precast structural column is connected to the floor slab. A precast cushion block added on-site is provided between the lower end surface of the precast structural column and the top surface of the lower-layer concrete module unit. The bearing capacity of the precast cushion block is lower than that of the precast structural column itself. At the same time, a flexible cushion layer is provided between the upper and lower concrete module units of the concrete modular building; The bearing capacity of the precast cushion block is f c1 A1, and the following formula needs to be satisfied: ； Where: N s - Design axial force value of prefabricated structural columns under construction load; - Stability coefficient of axially compressed reinforced concrete members; f c1 - Design value of axial compressive strength of precast cushion block concrete; f c2 - Design axial compressive strength value of precast structural column concrete; f y - Design value of tensile strength of longitudinal reinforcement bars of prefabricated construction columns A1 - cross-sectional area of the precast cushion block; A2 - cross-sectional area of the precast structural column; A s - Cross-sectional area of longitudinal reinforcement of precast structural columns; The flexible cushion layer is provided between the floor slabs and the top slabs of the upper and lower concrete module units, and the flexible cushion layer is not provided between the vertical members of the upper and lower concrete module units and between the precast structural columns of the upper and lower concrete module units.

2. The concrete modular building that simultaneously enhances seismic performance and sound insulation effect according to claim 1, wherein: The thickness of the flexible cushion layer is 10 mm to 25 mm.

3. The concrete modular building that simultaneously enhances seismic performance and sound insulation effect according to claim 1, characterized in that: The material of the flexible cushion layer is EPDM rubber.

4. The concrete modular building that simultaneously enhances seismic performance and sound insulation effect according to claim 1, wherein: Vertical steel bars and stirrups are provided in the precast structural column, and the upper ends of the vertical steel bars are anchored into the precast beam.

5. The concrete modular building that simultaneously enhances seismic performance and sound insulation effect according to claim 1, wherein: The top slab is a composite floor slab or a fully precast slab with partial post-casting.

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