Fabricated dry connection concrete special-shaped column component

Abstract

The utility model discloses an assembly type dry connection concrete special-shaped column component. The assembly type dry connection concrete special-shaped column component comprises column body concrete, common steel bars and a plurality of prestressed tendons. The column body concrete is provided with a plurality of holes which longitudinally penetrate through the column body and are used for containing the prestressed tendons, the common steel bars comprise stirrups and common longitudinal bars which are connected with each other, the common steel bars are only arranged on the column body and do not penetrate through a column section connecting interface, and the prestressed tendons longitudinally penetrate through the whole length of the component and penetrate through the column section connecting interface. The assembly type dry connection concrete special-shaped column component is simple in structure, convenient to install, good in anti-seismic performance and capable of being better matched with wall arrangement of a room, the better using effect that the structure does not protrude out of the wall is easily achieved, and the assembly type dry connection concrete special-shaped column component has obvious engineering advantages. And meanwhile, the connection problem and the anti-seismic safety problem of a fabricated concrete special-shaped column structure are solved, and the technical problems that in the prior art, steel special-shaped columns are adopted, so that the cost is high, and the fireproof and anti-corrosion performance is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforced concrete columns, in particular to a prefabricated dry-connected concrete special-shaped column member. Background Art

[0002] Reinforced concrete columns are important load-bearing members in concrete structures. Divided by shape, they can be divided into rectangular columns and special-shaped columns. Divided by production and construction methods, they can be divided into cast-in-place columns and prefabricated columns. Currently, the main practices are cast-in-place rectangular columns and prefabricated rectangular columns.

[0003] The construction method of the existing cast-in-place rectangular column in the prior art requires first tying longitudinal steel bars and stirrups at the construction site to form a steel bar cage, and then pouring concrete. After the concrete solidifies and reaches a certain strength, the formwork around the column is removed. The main disadvantages are complex processes and long construction periods.

[0004] In the prior art, for example, CN 105544865 B discloses a prestressed prefabricated composite special-shaped column. Although prestressed steel bars are also arranged in the special-shaped column, it requires on-site pouring and has a long construction period. The research and development of steel special-shaped column structures and steel special-shaped columns have been relatively mature, and there are also some actual projects. The common problems of steel structures are the need for large-area steel plates, a large number of welds and bolt connections, high costs, and poor fire and corrosion resistance.

[0005] Currently, the main method for prefabricated rectangular columns at home and abroad is grouting sleeve connection. Grouting sleeve connection realizes steel bar connection by embedding finished sleeves in precast concrete components and inserting steel bars into the sleeves and injecting grouting material. This technology is also the main method for vertical steel bar mechanical connection of precast components in China at present. Its disadvantages are a large number of steel bar alignment requirements, difficult control of grouting quality, lack of simple, efficient and reliable grouting quality detection means, and high costs. Moreover, the height of the post-cast concrete area of the traditional column connection node is generally within the range of the beam height, and the post-cast area is large, resulting in a large amount of formwork and wet operation.

[0006] Whether cast-in-place or prefabricated, when rectangular concrete columns are used in buildings, they are inevitably exposed because the cross-sectional size of the column body is larger than the wall thickness, resulting in an impact on the building appearance and use function. Existing column components of precast concrete structures are all for rectangular cross-sections, but rectangular cross-section columns often protrude from the wall and affect the use. In multi-story residential buildings, special-shaped columns with shapes such as L-shaped / T-shaped / cross-shaped / Z-shaped / I-shaped are more suitable for the wall layout of rooms and are more likely to achieve better use effects without protruding from the wall. Therefore, it is more urgent to solve the structure and assembly of special-shaped columns. Summary of the Utility Model

[0007] The purpose of the utility model is to provide a prefabricated dry-connected concrete special-shaped column member.

[0008] The technical solution for achieving the purpose of the present utility model is: An assembled dry-connected concrete special-shaped column member includes column body concrete, ordinary steel bars, and several prestressed steel bars; the column body concrete is provided with several longitudinally penetrating holes for accommodating prestressed steel bars, and the ordinary steel bars include stirrups and ordinary longitudinal bars that are connected to each other. The ordinary steel bars are only arranged in the column body and do not penetrate the column section connection interface, and the prestressed steel bars longitudinally penetrate the entire length of the member and pass through the column section connection interface.

[0009] Preferably, the top end of the assembled dry-connected concrete special-shaped column is flush with the lower edge of the floor slab of this layer, and the bottom end is flush with the upper edge of the floor slab of the lower layer. The post-cast concrete area of the column connection node is only concentrated within the range of the slab thickness.

[0010] Preferably, the upper and lower corresponding ends of the column body concrete are provided with concavities / convexities / roughness to facilitate the shear resistance of the column section connection interface.

[0011] Preferably, the assembled dry-connected concrete special-shaped column member is in an L shape, T shape, cross shape, Z shape, or I shape.

[0012] Preferably, at least one hole is provided at each end of the assembled dry-connected concrete special-shaped column member, and the hole is arranged in a matching manner with the prestressed steel bar.

[0013] Preferably, the prestressed steel bar is arranged coaxially with the hole.

[0014] Preferably, the assembled dry-connected concrete special-shaped column member is connected to the precast beam through the beam-column connection area.

[0015] Preferably, each assembled dry-connected concrete special-shaped column member is longitudinally connected through a support.

[0016] Preferably, the prestressed steel bars between adjacent assembled dry-connected concrete special-shaped column members are connected through a connector.

[0017] By adopting the above technical solution, the present utility model has the following beneficial effects: (1) The structure of the present utility model is ingenious. The ordinary steel bars of this member do not penetrate the connection interface, and only a small number of prestressed steel bars penetrate. On-site, only the prefabricated members need to be hoisted in place, the prestressed steel bars are connected and then tensioned. The number of steel bar connections is small, and the number of connectors is greatly reduced. At the same time, the post-cast concrete area of the column connection node is only concentrated within the range of the slab thickness, while the post-cast concrete area of the traditional column connection node is generally within the range of the beam height, and the thickness (i.e., height) of the beam is greater than the thickness of the cast-in-place slab. It solves the problems of the existing precast assembled columns, such as a large number of steel bar connections, difficult control of connection quality, high connection cost, and a large amount of on-site wet work.

[0018] (2) The prefabricated dry-connected concrete special-shaped column member has strong flexibility, with a rich cross-section form, and can be flush with the wall surface, solving the problem that the rectangular column protruding from the wall surface affects the appearance.

[0019] (3) Under seismic action, the prefabricated dry-connected concrete special-shaped column swings and opens along the concave-convex joint at the bottom, which can effectively reduce the impact of the earthquake, play a role in energy dissipation and shock absorption, cause little structural damage, and after the earthquake, the restoring force can be provided by gravity and prestressed tendons, enabling it to be quickly restored for use.

[0020] (4) The prefabricated dry-connected concrete special-shaped column member proposed by this utility model has a simple structure, is convenient to install, and has good seismic performance, with obvious engineering advantages. The concrete of the column body is a finished product produced by the factory according to demand, and the concrete of the column body does not need to be cast in situ during the construction process, solving the technical problems of high cost, poor fire and corrosion resistance caused by using steel special-shaped columns in the prior art, and at the same time solving the connection problem and seismic safety problem of the prefabricated concrete special-shaped column structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of this utility model easier to be clearly understood, the following further details the utility model according to specific embodiments and in conjunction with the drawings, where

[0022] Figure 1 is a sectional view of the prefabricated dry-connected concrete special-shaped column (L-shaped) of this utility model;

[0023] Figure 2 is a schematic cross-sectional view of the prefabricated dry-connected concrete special-shaped column (L-shaped) of this utility model;

[0024] Figure 3 is for this utility model Figure 1 is a schematic structural view of the concrete of the column body;

[0025] Figure 4 is for this utility model Figure 1 is a schematic structural view of the ordinary steel bars;

[0026] Figure 5 is a cross-sectional view of the prefabricated dry-connected concrete special-shaped column (T-shaped);

[0027] Figure 6 is a cross-section of the prefabricated dry-connected concrete special-shaped column (cross-shaped);

[0028] Figure 7 is a cross-sectional view of the prefabricated dry-connected concrete special-shaped column (Z-shaped);

[0029] Figure 8 is a cross-sectional view of the prefabricated dry-connected concrete special-shaped column (I-shaped);

[0030] Figure 9 It is a schematic assembly diagram of a precast dry-connected concrete special-shaped column structure.

[0031] Figure 10 It is a comparison diagram of the casting area of the prior art and the casting area of the present application. Detailed implementation manners

[0032] Embodiment 1

[0033] See Figures 1 to 10 , the precast dry-connected concrete special-shaped column member of this embodiment includes column body concrete 1, ordinary steel bars 2 and several prestressed steel bars 3; several holes 101 for accommodating prestressed steel bars are arranged longitudinally through the column body in the column body concrete 1, and the ordinary steel bars 2 include stirrups 201 and ordinary longitudinal bars 202 that are connected to each other. The ordinary steel bars 2 are only arranged in the column body and do not pass through the column section connection interface, and the prestressed steel bars longitudinally penetrate the entire length of the member and pass through the column section connection interface. The utility model provides a precast dry-connected concrete special-shaped column member. The ordinary steel bars of this member do not pass through the connection interface, and only a small number of prestressed steel bars pass through. During construction, only the precast members need to be hoisted in place, the prestressed steel bars are connected and then tensioned. The number of steel bar connections is small, and the number of connectors is greatly reduced. It solves the problems of a large number of steel bar connections and high connection costs of existing precast columns. The precast dry-connected concrete special-shaped column member has strong flexibility, has a rich cross-sectional form, can not protrude from the wall surface, and solves the problem that the rectangular column protruding from the wall surface affects the appearance. Under the action of an earthquake, the precast dry-connected concrete special-shaped column swings and opens along the bottom joint, which can effectively reduce the impact of the earthquake, play a role in energy dissipation and shock absorption, cause little structural damage, and after the earthquake, the gravity and prestressed steel bars provide restoring forces, so it can be quickly restored for use. The precast dry-connected concrete special-shaped column member proposed by this utility model has a simple structure, is convenient to install, has good seismic performance, and has obvious engineering advantages.

[0034] The top of the precast dry-connected concrete special-shaped column is flush with the lower edge of the floor slab of this layer, and the bottom is flush with the upper edge of the floor slab of the lower layer. The post-cast concrete area of the column connection node is only concentrated within the slab thickness range. In the prior art, the precast beam is provided with longitudinal steel bars and is cast after being inserted, so the cast-in-place area (as shown at x in the attachment) is from the bottom of the beam to the top surface of the floor slab, and this casting area is higher. Relatively speaking, the amount of formwork and wet work is large; in the present application, the top of the precast dry-connected concrete special-shaped column is flush with the lower edge of the floor slab of this layer, and the bottom is flush with the upper edge of the floor slab of the lower layer. Therefore, the casting area of the present application (as shown at B in the attachment) will be reduced, saving the amount of formwork and improving the efficiency. Figure 10 The upper and lower corresponding ends of the column body concrete are concavely and convexly arranged to facilitate the shear resistance of the column section connection interface. Figure 10 will be reduced, saving the formwork usage and improving the efficiency.

[0035] The upper and lower corresponding ends of the column body concrete are concavely and convexly arranged to facilitate the shear resistance of the column section connection interface.

[0036] The prefabricated dry-connected concrete special-shaped column members are L-shaped, T-shaped, cross-shaped, Z-shaped or I-shaped.

[0037] At least one hole is provided at each end of the prefabricated dry-connected concrete special-shaped column member, and the hole is arranged in a matching manner with the prestressed tendon.

[0038] The prestressed tendon 3 is coaxially arranged with the hole 101.

[0039] The prefabricated dry-connected concrete special-shaped column member is connected to the precast beam through the beam-column connection area 7.

[0040] Each of the prefabricated dry-connected concrete special-shaped column members is longitudinally connected through the support 4.

[0041] The prestressed tendons between adjacent prefabricated dry-connected concrete special-shaped column members are connected through the connector 5.

[0042] In the implementation process, the structural assembly method of the prefabricated dry-connected concrete special-shaped column member includes the following steps:

[0043] The first step: Install the prefabricated dry-connected concrete special-shaped column member of this layer. Specifically: Precast the column body concrete that meets the design requirements and is provided with ordinary steel bars in the factory. Corresponding holes are provided on the column body concrete, and the prestressed tendons that meet the technical requirements are precast. Insert the prestressed tendons into the holes of the column body concrete for assembly;

[0044] Move the prefabricated dry-connected concrete special-shaped column member (i.e., the column body concrete carrying ordinary steel bars and the prestressed tendons) to the construction area, and hoist and place the prefabricated dry-connected concrete special-shaped column member of this layer in place;

[0045] The second step: Install the precast beam 6 and the floor slab of this layer. The precast beam 6 and the prefabricated dry-connected concrete special-shaped column member are provided with a beam-column connection area 7 on the side, and the connection of the beam and the column is completed;

[0046] The third step: Install the prefabricated dry-connected concrete special-shaped column member of the upper layer. A support 4 is provided at the bottom of the prefabricated dry-connected concrete special-shaped column member of the upper layer, which is located on the top surface of the prefabricated dry-connected concrete special-shaped column member of this layer. Connect and fix the support 4, connect the prestressed tendons 3 of the prefabricated dry-connected concrete special-shaped column members of the upper and lower layers through the connector 5, and pour the concrete in the connection area;

[0047] The fourth step: Tension the prestressed tendon 3 layer by layer or section by section at the top of the column, lock and fix the prestressed tendon, and thus form an integral body.

[0048] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above description is only for the specific embodiments of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An assembled dry-connected concrete special-shaped column member, characterized in that: It includes column body concrete (1), ordinary steel bars (2) and several prestressed tendons (3); the column body concrete is provided with a number of holes (101) that longitudinally penetrate the column body for accommodating the prestressed tendons. The ordinary steel bars (2) include stirrups (201) and ordinary longitudinal bars (202) that are connected to each other. The ordinary steel bars (2) are only arranged in the column body and do not penetrate the column section connection interface. The prestressed tendons longitudinally penetrate the entire length of the component and pass through the column section connection interface.

2. The prefabricated dry-connected concrete special-shaped column member according to claim 1, wherein: The top end of the precast dry-connected concrete special-shaped column is flush with the lower edge of the floor slab of this layer, and the bottom end is flush with the upper edge of the floor slab of the lower layer. The post-cast concrete area of the column connection node is only concentrated within the range of the slab thickness.

3. The prefabricated dry-connected concrete special-shaped column member according to claim 1, wherein: The upper and lower corresponding ends of the column body concrete are set with concavities / convexities / roughness to facilitate the shear resistance of the column section connection interface.

4. The prefabricated dry-connected concrete special-shaped column member according to claim 2, wherein: The precast dry-connected concrete special-shaped column component is L-shaped, T-shaped, cross-shaped, Z-shaped or I-shaped.

5. The prefabricated dry-connected concrete special-shaped column member according to claim 4, characterized in that: At least one hole is provided at each end of the precast dry-connected concrete special-shaped column component, and the hole is arranged in a matching manner with the prestressed tendon.

6. The prefabricated dry-connected concrete special-shaped column member according to claim 1, wherein: The prestressed tendon (3) is arranged coaxially with the hole (101).

7. The prefabricated dry-connected concrete special-shaped column member according to claim 5, wherein: The precast dry-connected concrete special-shaped column component is connected to the precast beam through the beam-column connection area (7).

8. The prefabricated dry-connected concrete special-shaped column member according to claim 5, characterized in that: Each of the precast dry-connected concrete special-shaped column components is longitudinally connected through a support (4).

9. The prefabricated dry-connected concrete special-shaped column member according to claim 5, characterized in that: The prestressed tendons between adjacent precast dry-connected concrete special-shaped column components are connected through a connector (5).

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