ALC members, precast beams and precast columns

Abstract

The present invention discloses an ALC member, as well as a precast beam and a precast column made of the ALC member, relating to the field of prefabricated buildings, aiming to achieve the lightweight of the member and ensure its strength. The ALC member includes a columnar rod body, the rod body is autoclaved aerated concrete, at least one side strengthening belt is arranged on the side of the rod body, the side strengthening belt is parallel to the central line of the rod body, at least one circumferential strengthening belt is also arranged on the side of the rod body, the plane corresponding to the circumferential strengthening belt is perpendicular to the central line of the rod body, the circumferential strengthening belt intersects and is connected with the side strengthening belt, and both the side strengthening belt and the circumferential strengthening belt are cast-in-place or prefabricated and reinforced reinforcing bodies. The beam body of the precast beam is the above-mentioned ALC member, the outer contour of the rod body is a quadrangular prism, two opposite sides of the rod body respectively form the top surface and the bottom surface of the beam body, and a side strengthening belt is arranged on the bottom surface of the beam body. The column body of the precast column is the above-mentioned ALC member, the side of the precast column is the side of the rod body, and the side strengthening belts are uniformly arranged on the side of the rod body.

Description

Technical Field

[0001] The invention relates to the field of prefabricated buildings, in particular to an ALC rod, and a prefabricated beam and a prefabricated column made by the ALC rod. Background Art

[0002] Both beams and columns are rods, generally cast-in-place reinforced concrete. Both beams and columns are solid structures, often with large mass, and require maintenance after casting, so the construction period is relatively long.

[0003] Autoclaved aerated concrete has the advantages of light weight, good thermal insulation, heat insulation and fire resistance, but it also has disadvantages such as low compressive strength, low tensile strength and poor bond strength with steel bars. Therefore, autoclaved aerated concrete cannot be used directly as a load-bearing structure. Summary of the invention

[0004] The present invention first provides an ALC rod, the purpose of which is to achieve lightweighting of the rod and ensure its strength.

[0005] The technical solution adopted by the present invention is: an ALC rod, including a columnar rod body, the rod body is autoclaved aerated concrete, the rod body includes a side surface and two end surfaces, at least one straight side reinforcement belt running through the two end surfaces is arranged on the side surface of the rod body, the center line of the side reinforcement belt is parallel to the center line of the rod body, at least one circle of annular reinforcement belt is also arranged on the side surface of the rod body, the plane corresponding to the annular reinforcement belt is perpendicular to the center line of the rod body, the annular reinforcement belt is intersected and connected with the side reinforcement belt, the side reinforcement belt and the annular reinforcement belt are both cast-in-place, prefabricated or partially cast-in-place and partially prefabricated reinforcement bodies, and the reinforcement bodies have reinforcement.

[0006] In order to optimize the deformation of the ALC rod after being subjected to force, further: the number of the side reinforcement belts is an even number, and the side reinforcement belts are arranged symmetrically along the center line of the rod body.

[0007] In order to enable the ALC rod to be connected with other structures through the reinforcement of the side reinforcement belt, further: both ends of the reinforcement of the side reinforcement belt are respectively extended to the outside of the corresponding end surface.

[0008] In order to ensure the hoop constraint effect of the annular reinforcement belt, further: the reinforcement of the annular reinforcement belt is connected with the reinforcement of the side reinforcement belt at the intersection, and the reinforcement of the annular reinforcement belt is located outside the reinforcement of the side reinforcement belt.

[0009] The side reinforcement belt and the annular reinforcement belt are both reinforcement bodies with reinforcement. The reinforcement body and the reinforcement are combined with each other to improve the strength of the reinforcement belt itself and play a role in reinforcing the rod body. Specifically: the reinforcement body is mortar, fine stone concrete, expanded clay concrete, cement-based grouting material, high-strength gypsum, epoxy resin grouting material, etc.

[0010] Specifically: The outer contour of the rod body is in the shape of a quadrangular prism, and side strengthening bands are provided on only two opposite side surfaces of the quadrangular prism, or side strengthening bands are provided on all four side surfaces; or the outer contour of the rod body is in the shape of a cylinder, and side strengthening bands are evenly arranged around the cylinder.

[0011] For the convenience of the production of the side strengthening bands and the circumferential strengthening bands, further: grooves are respectively provided on the surface of the rod body along the side strengthening bands and the circumferential strengthening bands. The side strengthening bands and the circumferential strengthening bands are both located at the grooves, and the surfaces of the side strengthening bands and the circumferential strengthening bands are flush with, protrude from, or are lower than the corresponding surfaces of the rod body.

[0012] The groove can be of any shape in its cross-section. To optimize the strengthening effect of the side strengthening bands and the circumferential strengthening bands and also for the convenience of the production of the side strengthening bands and the circumferential strengthening bands, specifically: the groove is in the shape with the same size of the groove opening and the groove bottom or the shape with the groove opening larger than the groove bottom in its cross-section. For example, the side strengthening bands and the circumferential strengthening bands are in the shape of a rectangle, a semicircle, a trapezoid, or a sector ring in their respective cross-sections.

[0013] The beneficial effects of the ALC rod member of the present invention are as follows: The rod body of the ALC rod member is autoclaved aerated concrete, making the ALC rod member have the characteristic of light weight. When the ALC rod member is mainly subjected to a load perpendicular to the center line of the rod body, one side of the rod body is compressed and the opposite side is tensioned. The side strengthening bands make up for the tensile capacity and / or compressive capacity of the rod body. The circumferential strengthening bands tightly connect the side strengthening bands with the rod body and are not easily separated, improving the strengthening effect of the side strengthening bands on the rod body. At the same time, it also inhibits the generation of shear inclined cracks at the positions with large shear forces (such as at the supports), improving the shear bearing capacity of the ALC rod member. When the ALC rod member is mainly subjected to a load parallel to the center line of the rod body, for example, when the ALC rod member is used as a column and is mainly compressed, the side strengthening bands make up for the compressive capacity of the rod body, and the circumferential strengthening bands limit the expansion deformation of the rod body after compression, further improving the overall compressive bearing capacity of the side strengthening bands and the rod body. The rod body is provided with side strengthening bands and circumferential strengthening bands, which not only improve the ability of the ALC rod member to bear the load parallel to the center line of the rod body but also improve the ability of the ALC rod member to bear the load perpendicular to the center line of the rod body.

[0014] The present invention also provides a precast beam, aiming to achieve the light weight of the precast beam and ensure its strength. The beam body of the precast beam is any one of the above-mentioned ALC rod members. The outer contour of the rod body is in the shape of a quadrangular prism. The two opposite side surfaces of the rod body respectively form the top surface and the bottom surface of the beam body, and side strengthening bands are provided on the bottom surface of the beam body, or side strengthening bands are provided on both the top surface and the bottom surface of the beam body.

[0015] To ensure the compressive strength of the precast beam, further: grooves are respectively provided on the corresponding side surfaces of the top surface and the bottom surface of the beam body. The side strengthening bands are located in the grooves and are flush with the corresponding side surfaces. The reinforcement of the side strengthening bands is a columnar steel cage or a steel mesh sheet.

[0016] To avoid casting the reinforcement body during formwork erection, further: the side strengthening belts and circumferential strengthening belts on the top surface of the beam body are cast-in-place and are reinforcement bodies with steel bars, and the side strengthening belts and circumferential strengthening belts at other positions of the beam body are precast and are reinforcement bodies with steel bars.

[0017] The beneficial effects of the precast beam of the present invention are: the bottom surface of the beam body where stress concentration occurs is strengthened by the side strengthening belt, or the top surface and bottom surface where stress concentration occurs are respectively strengthened by the side strengthening belt, and circumferential restraint is carried out through the circumferential strengthening belt. Other parts of the beam body are made of lightweight and low-strength autoclaved aerated concrete, realizing the lightweight of the precast beam on the premise of ensuring the flexural bearing capacity and shear bearing capacity of the beam body.

[0018] The present invention also provides a precast column, aiming to realize the lightweight of the precast column and ensure its strength. For the precast column, the column body of the precast column is any one of the above-mentioned ALC members, the side surface of the precast column is the side surface of the member, and side strengthening belts are uniformly arranged on the side surface of the member.

[0019] To avoid the cast-in-place of the side strengthening belt and the circumferential strengthening belt, specifically: the side strengthening belt and the circumferential strengthening belt are precast and are reinforcement bodies with steel bars, or are partially precast and partially cast-in-place and are reinforcement bodies with steel bars.

[0020] The beneficial effects of the precast column of the present invention are: the precast column mainly bears vertical loads, that is, mainly bears loads parallel to the center line of the member. The column body may produce expansion deformation under the action of vertical loads. The side strengthening belt and the circumferential strengthening belt play a role in strengthening the column body, and the circumferential strengthening belt also plays a role of a hoop, ensuring the compressive capacity of the column body. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the precast beam of the present invention on a cross-section perpendicular to its center line and passing through the circumferential strengthening belt.

[0022] Figure 2 It is a schematic structural diagram of the precast beam of the present invention on a cross-section perpendicular to its center line and not passing through the circumferential strengthening belt.

[0023] Figure 3 It is a schematic structural diagram of the precast column of the present invention on a cross-section perpendicular to its center line and passing through the circumferential strengthening belt.

[0024] Figure 4 It is a schematic structural diagram of the precast column of the present invention on a cross-section perpendicular to its center line and not passing through the circumferential strengthening belt.

[0025] Reference Signs: Member 1, Side Strengthening Belt 2, Circumferential Strengthening Belt 3. Detailed Description of the Invention

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] The first subject of the present invention is an ALC rod. Refer to Figure 1 and Figure 2 , or Figure 3 and Figure 4 , the ALC rod includes a columnar rod body 1. The rod body 1 is lightweight autoclaved aerated concrete. The rod body 1 includes a side surface and two end surfaces. The side surface can be a curved surface, or multiple flat surfaces, or a combination of a curved surface and flat surfaces. The rod body 1 is generally in the shape of a cylinder or a prism. The side surface of the rod body 1 corresponds to a curved surface or a flat surface accordingly. The top and bottom surfaces of the cylinder and the prism are the two end surfaces of the rod body 1. At least one side strengthening belt 2 is provided on the side surface of the rod body 1. Both ends of the side strengthening belt 2 penetrate through the two end surfaces. The center line of the side strengthening belt 2 is a straight line and is parallel to the center line of the rod body 1. In order to cope with the deformation of the ALC rod after being subjected to a load perpendicular to the center line of the rod body 1 and ensure the ability of the ALC rod to resist deformation, the number of side strengthening belts 2 is an even number, and the side strengthening belts 2 are arranged axially symmetrically along the center line of the rod body 1. For example, the outer contour of the rod body 1 is in the shape of a quadrangular prism, and side strengthening belts 2 are respectively provided on two opposite side surfaces of the rod body 1. Refer to Figure 1 and Figure 2 ; or, side strengthening belts 2 are provided on all four side surfaces of the rod body 1. Refer to Figure 3 and Figure 4 . For another example, the outer contour of the rod body 1 is in the shape of a cylinder, and side strengthening belts 2 are evenly arranged around the cylinder, that is, each side strengthening belt 2 is arranged at an equal central angle.

[0028] At least one ring of circumferential strengthening belts 3 is also provided on the side surface of the rod body 1. The plane corresponding to the circumferential strengthening belt 3 is perpendicular to the center line of the rod body 1. The circumferential strengthening belt 3 intersects and is connected to the side strengthening belt 2. Both the side strengthening belt 2 and the circumferential strengthening belt 3 are cast-in-place, precast, or partially cast-in-place and partially precast reinforcing bodies, and the reinforcing bodies have steel bars. The steel bars of the circumferential strengthening belt 3 are in a ring shape, and the steel bars of the circumferential strengthening belt 3 are in a strip shape or a column shape. In order to improve the connection strength between the side strengthening belt 2 and the circumferential strengthening belt 3, the steel bars of the circumferential strengthening belt 3 are connected to the steel bars of the side strengthening belt 2 at the intersection, which can be connected by tying or welding. The circumferential strengthening belt 3 plays a role of hoop on the rod body 1 and the side strengthening belt 2. Therefore, the steel bars of the circumferential strengthening belt 3 are preferably located outside the steel bars of the side strengthening belt 2.

[0029] The reinforcing bodies in each subject of the present invention are all made of materials with better strength than the rod body 1. The reinforcing bodies are combined with the steel bars to ensure the self-strength of the strengthening belts and play a role in strengthening the rod body 1. Generally speaking, the reinforcing bodies are mortar, fine aggregate concrete, ceramsite concrete, cement-based grouting material, high-strength gypsum, epoxy resin grouting material, etc.

[0030] The two ends of the rod body 1 generally need to be connected to other structures. In order to allow the rod body 1 to be tied to other structures through the reinforcement of the side reinforcement belt 2, the two ends of the reinforcement of the side reinforcement belt 2 are respectively extended to the outside of the corresponding end surface. For example, when the two ends of the rod body 1 are connected to the cast-in-place structure, the reinforcement of the side reinforcement belt 2 can extend into the cast-in-place structure and can also be connected to the reinforcement of the cast-in-place structure.

[0031] The side reinforcement band 2 and the annular reinforcement band 3 can be directly arranged on the surface of the rod body 1. In order to facilitate the production of the side reinforcement band 2 and the annular reinforcement band 3, grooves are arranged on the surface of the rod body 1, and the side reinforcement band 2 and the annular reinforcement band 3 are respectively arranged in the grooves. The surfaces of the side reinforcement band 2 and the annular reinforcement band 3 are flush with the corresponding surfaces of the rod body 1, protrude from the corresponding surfaces, or are lower than the corresponding surfaces. In order to make the surface of the rod body 1 smooth, the surfaces of the side reinforcement band 2 and the annular reinforcement band 3 are flush with the corresponding surfaces of the rod body 1. The side reinforcement band 2 and the annular reinforcement band 3 are respectively arranged in the grooves of the rod body 1, and the grooves can be of any shape in their cross-sections. In order to give full play to the reinforcement effect of the side reinforcement band 2 and the annular reinforcement band 3, and also to facilitate the production of the side reinforcement band 2 and the annular reinforcement band 3,

[0032] The groove has a shape in which the groove opening and the groove bottom are equal in size or the groove opening is larger than the groove bottom. For example, when the rod body 1 is in the shape of a prism, the groove has a rectangular, semicircular or trapezoidal cross section, and the side reinforcement belt 2 and the annular reinforcement belt 3 have a rectangular, semicircular or trapezoidal cross section; when the rod body 1 is in the shape of a cylinder, the groove has a fan-shaped cross section, and the side reinforcement belt 2 and the annular reinforcement belt 3 have a fan-shaped cross section.

[0033] The second subject of the present invention is a prefabricated beam, the purpose of which is to achieve lightweight prefabricated beams while ensuring their strength. Figure 1 and Figure 3 As shown, the beam body of the precast beam is the ALC rod member described in the first subject, and the outer contour of the rod body 1 is in the shape of a quadrangular prism, and the rod body 1 has four side surfaces, and two opposite side surfaces of the rod body 1 respectively form the top surface and the bottom surface of the beam body, and the bottom surface of the beam body is provided with a side reinforcement belt 2, or the top surface and the bottom surface of the beam body are provided with a side reinforcement belt 2. The beam body has four side surfaces, and the side reinforcement belts 2 may be provided on the two side surfaces other than the top surface and the bottom surface, or may not be provided with the side reinforcement belts 2.

[0034] Since the side strengthening belts 2 and circumferential strengthening belts 3 at the bottom surface of the precast beam are not convenient for in-situ casting, in order to avoid formwork support for casting the reinforcement body, the side strengthening belts 2 and circumferential strengthening belts 3 on the top surface of the beam body can be cast in-situ, and the side strengthening belts 2 and circumferential strengthening belts 3 at other positions are precast reinforcement bodies with reinforcement bars, or are partially precast and partially cast in-situ reinforcement bodies with reinforcement bars. The reinforcement bars of the side strengthening belt 2 are determined according to the stress analysis. Considering the large stress of the precast beam, in order to ensure the flexural strength of the precast beam, the reinforcement bars of the side strengthening belt 2 are steel reinforcement cages, as Figure 1 and Figure 2 shown. The side strengthening belt 2 can also be a steel mesh sheet.

[0035] The third subject of the present invention is a precast column, and the purpose is to achieve the light weight of the precast column and ensure its strength. Refer to Figure 3 and Figure 4 . The column body of the precast column is the ALC rod described in the first subject above. The side surface of the precast column is the side surface of the rod 1, and the side strengthening belts 2 are uniformly arranged on the side surface of the rod 1. In order to avoid the in-situ construction of the side strengthening belt 2 and the circumferential strengthening belt 3, both the side strengthening belt 2 and the circumferential strengthening belt 3 are precast reinforcement bodies with reinforcement bars, or are partially precast and partially cast in-situ reinforcement bodies with reinforcement bars.

Claims

1. ALC member, including a columnar rod body (1), the rod body (1) being autoclaved aerated concrete, the rod body (1) including a side surface and two end surfaces, characterized in that: On the side surface of the rod body (1), at least one straight side strengthening belt (2) that penetrates through two end faces is provided. The center line of the side strengthening belt (2) is parallel to the center line of the rod body (1). At least one circumferential strengthening belt (3) is also provided on the side surface of the rod body (1). The plane corresponding to the circumferential strengthening belt (3) is perpendicular to the center line of the rod body (1). The circumferential strengthening belt (3) intersects and is connected to the side strengthening belt (2). Grooves are respectively provided on the surface of the rod body (1) along the side strengthening belt (2) and the circumferential strengthening belt (3). The side strengthening belt (2) and the circumferential strengthening belt (3) are both located at the grooves. The surfaces of the side strengthening belt (2) and the circumferential strengthening belt (3) are flush with, protrude from, or are lower than the corresponding surface of the rod body (1). The side strengthening belt (2) and the circumferential strengthening belt (3) are both cast-in-place, precast, or partially cast-in-place and partially precast reinforcing bodies, and the reinforcing bodies are provided with steel bars.

2. The ALC rod according to claim 1, wherein: The number of the side strengthening belts (2) is an even number, and the side strengthening belts (2) are arranged axially symmetrically along the center line of the rod body (1).

3. The ALC rod according to claim 1, characterized in that: Both ends of the steel bars of the side strengthening belt (2) extend beyond the corresponding end faces respectively.

4. The ALC rod according to claim 1, characterized in that: The steel bars of the circumferential strengthening belt (3) are connected to the steel bars of the side strengthening belt (2) at the intersection, and the steel bars of the circumferential strengthening belt (3) are located outside the steel bars of the side strengthening belt (2).

5. The ALC member according to claim 1, wherein: The reinforcing body is mortar, fine aggregate concrete, ceramsite concrete, cement-based grouting material, high-strength gypsum, or epoxy resin grouting material.

6. The ALC rod according to claim 1, characterized in that: The outer contour of the rod body (1) is in the shape of a quadrangular prism. Side strengthening belts (2) are respectively provided only on two opposite side surfaces of the quadrangular prism, or on all four side surfaces; or the outer contour of the rod body (1) is in the shape of a cylinder, and side strengthening belts (2) are evenly provided around the cylinder.

7. The ALC rod according to any one of claims 1 to 6, characterized in that: The groove is in the shape of equal-sized groove opening and groove bottom or a shape with a larger groove opening than the groove bottom in its cross-section.

8. Prefabricated beam, characterized in that: The beam body of the precast beam is an ALC rod member described in any one of claims 1 to 7 above. The outer contour of the rod body (1) is in the shape of a quadrangular prism. Two opposite side surfaces of the rod body (1) respectively form the top surface and the bottom surface of the beam body, and a side strengthening belt (2) is provided on the bottom surface of the beam body, or side strengthening belts (2) are provided on both the top surface and the bottom surface of the beam body.

9. The precast beam according to claim 8, wherein: Grooves are respectively provided on the corresponding side surfaces of the top surface and the bottom surface of the beam body. The side strengthening belt (2) is located in the groove and is flush with the corresponding side surface. The steel bars of the side strengthening belt (2) are columnar steel cages or steel mesh sheets.

10. The precast beam according to claim 8 or 9, characterized in that: The side strengthening belt (2) and the circumferential strengthening belt (3) on the side surface of the top surface of the beam body are cast-in-place and reinforcing bodies with steel bars, and the side strengthening belt (2) and the circumferential strengthening belt (3) at other positions of the beam body are precast and reinforcing bodies with steel bars.

11. Prefabricated column, characterized in that: The column body of the precast column is an ALC rod member described in any one of claims 1 to 7 above. The side surface of the precast column is the side surface of the rod body (1), and side strengthening belts (2) are evenly arranged on the side surface of the rod body (1).

12. The precast column according to claim 11, wherein: The side strengthening belt (2) and the circumferential strengthening belt (3) are precast and reinforcing bodies with steel bars, or are partially precast and partially cast-in-place and reinforcing bodies with steel bars.

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