Novel prefabricated combined hollow column

Abstract

The utility model discloses a novel prefabricated combined hollow column, and belongs to the technical field of civil engineering. The utility model relates to a building block, which is characterized by comprising an upper plano-convex prefabricated part and a lower plano-convex prefabricated part, the two plano-convex prefabricated parts are respectively provided with a central through hole, the end face of one end of each plano-convex prefabricated part is a plane, and the end face of the other end of each plano-convex prefabricated part is provided with a trapezoidal boss; the concave prefabricated part is located between the two plano-convex prefabricated parts, a central through hole is formed in the concave prefabricated part, and trapezoidal grooves matched with the trapezoidal bosses are formed in the end faces of the two ends of the concave prefabricated part respectively; and the connecting bolts are used for connecting the plano-convex type prefabricated parts and the concave-concave type prefabricated parts so as to form the hollow column body component. The column, the rod or the beam of the building is mainly used for reinforcing and transforming projects, can improve the bearing capacity of a vertical component and the overall anti-seismic property of the structure, and has good energy-dissipating capacity.

Description

Technical Field

[0001] This utility model relates to a column component, specifically a novel prefabricated composite hollow column, belonging to the field of civil engineering technology. Background Technology

[0002] Hollow columns, due to their internal cavities, can serve not only as supports but also as pipes, and are therefore widely used as utility poles or columns and beams in buildings. Most existing hollow columns are one-piece designs, making disassembly inconvenient and often resulting in damage, hindering reinstallation and reuse. Utility Model Content

[0003] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of prefabricated composite hollow column, mainly used for reinforcement and renovation projects. As a column, pole or beam of a building, it can improve the bearing capacity of vertical components and the overall seismic performance of the structure, and has good energy dissipation capacity.

[0004] In order to solve the above-mentioned technical problems and achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0005] A novel prefabricated composite hollow column is characterized by mainly comprising prefabricated hollow FRCC components and connectors. The prefabricated hollow FRCC components are divided into plano-convex and concave-concave prefabricated components, and the connectors mainly employ connecting bolts.

[0006] The flat-convex precast component is divided into upper and lower parts, which are used to connect the precast hollow FRCC component to the bottom of the beam or the top of the beam (ground). Both flat-convex precast components are provided with a central through hole, and one end face is flat, while the other end face is provided with a trapezoidal boss.

[0007] The concave-convex precast component is located between two flat-convex precast components and is used for the connection between the flat-convex precast components. It is provided with a central through hole (on the same hollow column, the central through holes of all precast components have the same diameter and are coaxial), and the end faces of both ends are provided with trapezoidal grooves that match the trapezoidal boss.

[0008] Connecting bolts are used to connect flat-convex precast components and concave-concave precast components. The top and bottom connecting bolts are anchored in the frame beam and the ground, respectively. The precast components are formed into hollow column components by connecting bolts. At this time, the central through hole of the precast component is coaxial and forms the cavity of the hollow column.

[0009] In the above scheme, one end face of the plano-convex precast component is a trapezoidal boss, while the other end face is horizontal, used for connection with the bottom or top (ground) of the beam. The top and bottom of the concave-convex precast component are trapezoidal grooves, matching the trapezoidal bosses of the upper and lower plano-convex precast components. Under seismic loading, the tongue and groove joints of the precast components can effectively transmit shear force, the precast components themselves can bear part of the axial force, and the connecting bolts are used to bear axial tensile force and part of the shear force.

[0010] Furthermore, both the plano-convex precast component and the concave-concave precast component are FRCC precast components made of fiber-reinforced cementitious composite materials. The precast components made of fiber-reinforced cementitious composite materials have significantly improved tensile and flexural strength and fracture energy compared to unreinforced cementitious matrices.

[0011] Furthermore, structural adhesive layers are provided at the tongue and groove joints of the concave-convex prefabricated component and the two flat-convex prefabricated components, respectively, and the structural adhesive layers serve to strengthen the connection and seal.

[0012] Furthermore, the diameter of the connecting bolts is 14-20mm to ensure that the hollow column as a whole has sufficient shear resistance.

[0013] Furthermore, the outer surface of the concave-convex precast component and the outer surface of the flat-convex precast component are respectively provided with rectangular grooves; the upper and lower groove walls of each rectangular groove are respectively provided with coaxial threaded through holes for mating with connecting bolts. The rectangular grooves are provided for four reasons: first, to facilitate the installation and tightening of connecting bolts; second, to hide the connecting bolts; third, to reduce the counterweight of the precast component; and fourth, to facilitate the inspection and secondary installation of the precast component.

[0014] Furthermore, the rectangular groove is provided with a filling layer, which is made of foamed concrete or low-grade cement mortar, to protect the connecting bolts and facilitate maintenance, replacement, or disassembly. Accordingly, the prefabricated component can be reused.

[0015] Furthermore, the trapezoidal boss consists of a first plane, a second plane, and four sides connecting the first and second planes. The four sides are a pair of oppositely arranged inclined planes and a pair of oppositely arranged planes. Both the first and second planes are the same width as the precast component, but the length of the first plane is less than the length of the second plane, and the length of the second plane is less than the length of the precast component. The second plane coincides with the end face of the precast component. Rectangular grooves are provided on opposite outer sides of the precast component (on the same side as the inclined planes), meaning that the precast components are connected by double-sided bolts.

[0016] Prefabricated composite hollow columns with double-sided bolt connections are mainly used in two scenarios:

[0017] First, the connection with the existing frame structure is to attach one smooth plane of this new prefabricated composite hollow column to the existing frame column, with the other relatively smooth plane facing the interior direction, and the other two sides are bolted together.

[0018] Another application is in the vertical gap between the frame column and the infill wall. When reinforcement is needed, only the infill wall that is suitable for the size of the prefabricated composite hollow column needs to be removed. The new prefabricated composite hollow column has one smooth plane attached to the frame column and another smooth plane attached to the infill wall, which can retain most of the wall. This new prefabricated composite hollow column with double-sided bolt connection is a unidirectional lateral force resisting member.

[0019] Furthermore, the trapezoidal boss consists of a first plane, a second plane, and four sides connecting the first and second planes, each side being a sloping surface. The width and length of the first plane are smaller than the width and length of the second plane, respectively, and the width and length of the second plane are smaller than the width and length of the precast component, respectively. The second plane coincides with the end face of the precast component. Rectangular grooves are provided on the four outer sides of the precast component, meaning that the precast components are connected by four-sided bolts.

[0020] Precast composite hollow columns with four-sided bolt connections are used as independent columns, such as those in the central position of an interior space. These new precast composite hollow columns with four-sided bolt connections are bidirectional lateral force resisting members.

[0021] In the above scheme, the side of the trapezoidal boss adopts a bevel design, which has the following advantages: first, it increases the contact area of ​​the tongue and groove and reduces stress concentration; second, it can resist horizontal shear force; third, it facilitates the installation between prefabricated components and makes alignment easier; and fourth, it can improve the sealing performance of the tongue and groove.

[0022] Furthermore, the angle between the inclined surface of the trapezoidal boss and the first or second plane is 30° to 60°, preferably 45°. Prefabricated components within this angle range are easier to assemble and exhibit better overall performance.

[0023] Furthermore, the distance between the threaded through hole at the wall of the rectangular groove and the outer side of the precast component (i.e., the distance between the bolt reserved hole in the precast component and the outermost skin) should not be less than 1 times the diameter of the connecting bolt; at the tongue and groove of the precast component, the distance between the central through hole and the outer side of the first plane of the trapezoidal boss should not be less than 1 times the diameter of the connecting bolt.

[0024] Furthermore, the diameter of the central through hole is 0.3 to 0.5b, where b is the length of the short side of the cross-section of the hollow column (i.e., the width of the prefabricated component).

[0025] The assembly steps of the prefabricated combined hollow column of this utility model are as follows:

[0026] 1) Apply a structural adhesive layer to the tongue and groove joints of the flat-convex and concave-concave precast components. The structural adhesive layer serves to strengthen the connection and seal the joint.

[0027] 2) Connecting bolts are inserted through the threaded holes corresponding to the rectangular grooves of the flat-convex and concave-concave precast components, and the two are connected into a whole by tightening the nuts;

[0028] 3) Based on step 2), continue to connect another flat-convex prefabricated component to form a hollow column, which is the hollow column of this utility model;

[0029] 4) Based on step 3), the rectangular groove of the precast component is filled. The filling material can be foamed concrete or low-grade cement mortar.

[0030] This new type of prefabricated composite hollow column is mainly used in reinforcement and renovation projects. It can improve the load-bearing capacity of vertical components, enhance the seismic performance of the structure, and has good energy dissipation capacity, making it suitable as a damping device. In addition to pre-embedded pipes, if reinforcement is needed during later use, the upper components can be removed, and square steel bars can be inserted from top to bottom to enhance the load-bearing capacity of the structure. Attached Figure Description

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0032] Figure 1 This is a cross-sectional schematic diagram of the novel combined hollow column of this utility model;

[0033] Figure 2 This is a schematic diagram of a prefabricated composite hollow column with double-sided bolt connection;

[0034] Figure 3 This is a schematic diagram of a prefabricated composite hollow column with four-sided bolt connections;

[0035] In the figure: 1 connecting bolt, 2 structural adhesive layer, 3 trapezoidal boss, 4 flat-convex precast component, 5 concave-convex precast component, 6 central through hole, 7 rectangular groove, 8 threaded through hole, 9 first plane, 10 inclined plane, 11 trapezoidal groove. Detailed Implementation

[0036] Example 1

[0037] A new type of prefabricated modular hollow column, such as Figure 1 As shown, it includes two flat-convex precast components 4, one concave-concave precast component 5, and multiple connecting bolts 1. Both the flat-convex and concave-concave precast components are FRCC precast components.

[0038] All the planar-convex precast components have a central through hole 6, and one end face is flat, while the other end face has a trapezoidal boss 3. The concave-convex precast component is located between two planar-convex precast components, also with a central through hole 6, and both end faces have trapezoidal grooves 11 matching the shape of the trapezoidal bosses. Connecting bolts 1 are used to connect the precast components, forming hollow column components. The connecting bolts at the top and bottom are anchored to the frame beam or the ground, respectively. Structural adhesive layers 2 are provided at the tongue-and-groove joints of the concave-convex precast component and the two planar-convex precast components.

[0039] like Figure 2 As shown, the trapezoidal boss 3 consists of a first plane 9, a second plane, and four sides connecting the first and second planes. The four sides are a pair of oppositely arranged inclined planes 10 and a pair of oppositely arranged planes. The first plane and the second plane are the same width as the precast component. The length of the first plane is less than the length of the second plane, and the length of the second plane is less than the length of the precast component. The second plane coincides with the end face of the precast component.

[0040] like Figure 2 As shown, rectangular grooves 7 are respectively provided on one opposite outer side of the precast component (on the same side as the inclined plane), that is, the precast components are connected by double-sided bolts. The upper and lower groove walls of each rectangular groove are respectively provided with coaxial threaded through holes 8 to cooperate with the connecting bolts.

[0041] The rectangular groove is filled with a foamed concrete layer.

[0042] Example 2

[0043] Unlike Example 1, as Figure 3 As shown, the trapezoidal boss 3 consists of a first plane 9, a second plane, and four sides connecting the first and second planes. The four sides are four inclined planes 10. The width and length of the first plane are smaller than the width and length of the second plane, respectively. The width and length of the second plane are smaller than the width and length of the precast component, respectively. The second plane coincides with the end face of the precast component.

[0044] like Figure 3 As shown, rectangular grooves 7 are provided on the four outer sides of the prefabricated components, that is, the prefabricated components are connected by four-sided bolts.

[0045] Example 3

[0046] Based on Embodiment 1 or Embodiment 2, the angle between the inclined surface of the trapezoidal boss and the first or second plane is 45°.

[0047] Example 4

[0048] Based on Embodiment 1, Embodiment 2 or Embodiment 3, the diameter of the central through hole 6 is 0.3 to 0.5b, where b is the length of the short side of the cross-section of the hollow column (i.e., the width of the prefabricated component), and the diameter of the connecting bolt 1 is 14 to 20 mm.

[0049] The distance between the threaded through hole 8 at the wall of the rectangular groove and the outer side of the corresponding precast component should be no less than one times the diameter of the connecting bolt. The distance between the central through hole 6 of the precast component and the outer side of the first plane 9 of the trapezoidal boss should be no less than one times the diameter of the connecting bolt.

Claims

1. A new prefabricated modular hollow column, characterized in that, The utility model relates to a hollow column prefabricated component, comprising: Two flat convex prefabricated components, which are divided into upper and lower parts; Both of the two flat convex prefabricated components are provided with a central through hole, and the end face of one end is a plane, and the end face of the other end is provided with a trapezoidal boss respectively; A concave-concave prefabricated component is located between the two flat convex prefabricated components; the concave-concave prefabricated component is also provided with a central through hole, and the end face of both ends is provided with a trapezoidal groove matched with the trapezoidal boss respectively; Connecting bolts are used to connect the flat convex prefabricated components and the concave-concave prefabricated component to form a hollow column component.

2. A new prefabricated modular hollow column according to claim 1, characterized in that, The concave-concave prefabricated component and the joint of the two flat convex prefabricated components are respectively provided with a structural adhesive layer.

3. A new prefabricated combined hollow column according to claim 1, characterized in that, The outer side of the concave-concave prefabricated component and the outer side of the flat convex prefabricated component are respectively provided with a rectangular groove; the upper groove wall and the lower groove wall of each rectangular groove are respectively provided with a coaxial threaded through hole to cooperate with the connecting bolt.

4. A new prefabricated combined hollow column according to claim 3, characterized in that, The trapezoidal boss is composed of a first plane, a second plane and four sides connecting the first and second planes, and the four sides are a pair of oppositely arranged inclined planes and a pair of oppositely arranged planes.

5. A new prefabricated modular hollow column according to claim 3, characterized in that, The trapezoidal boss is composed of a first plane, a second plane and four sides connecting the first and second planes, and the four sides are four inclined planes.

6. A new prefabricated modular hollow column according to claim 4 or 5, characterized in that, The angle between the inclined plane of the trapezoidal boss and the first or second plane is 30°-60°.

7. A new prefabricated modular hollow column according to claim 3, characterized in that, A filling layer is arranged in the rectangular groove.

8. A new prefabricated modular hollow column according to claim 1, characterized in that, The diameter of the central through hole is 0.3-0.5b, and b is the length of the short side of the cross section of the hollow column.

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