Structure for layered installation of dry connection concrete shear wall / special-shaped column

Abstract

The utility model discloses a layered installation dry connection concrete shear wall / special-shaped column structure, which comprises a prefabricated shear wall / special-shaped column, a prefabricated beam and a laminated slab, the prefabricated shear wall / special-shaped column is prefabricated by taking a single layer as a section, and comprises shear wall / special-shaped column body concrete, common steel bars and a plurality of prestressed tendons; the shear wall / special-shaped column body concrete is provided with a plurality of holes which longitudinally penetrate through the shear wall / special-shaped column body and are used for containing the prestressed tendons, the ordinary steel bars comprise stirrups and ordinary longitudinal bars which are connected with each other, and the ordinary steel bars are only arranged on the shear wall / special-shaped column body and are integrally poured with the shear wall / special-shaped column body concrete. And the prestressed tendons longitudinally penetrate through the whole length of the component and penetrate through the shear wall / special-shaped column section connecting interface. A single layer serves as a section to be prefabricated, dry connection concrete shear walls / special-shaped columns are installed in a layered mode, the structural flexibility is high, and assembling can be conducted in a layered mode according to requirements.

Description

Technical Field

[0001] This utility model relates to the field of building technology, and in particular to a structure for layered installation of dry-connected concrete shear walls / irregular columns. Background Technology

[0002] Reinforced concrete columns are important load-bearing components in concrete structures. Based on shape, they can be divided into rectangular columns and irregularly shaped columns. Irregularly shaped columns offer a variety of forms, are the same thickness as the building walls, and can organically combine architectural aesthetics, functional flexibility, and reasonable structural load-bearing performance, making them particularly suitable for use in low-rise and multi-story residential buildings. Reinforced concrete shear walls have a similar shape to irregularly shaped columns, but the difference lies in the fact that the former's length-to-thickness ratio is significantly greater than the latter's.

[0003] In existing technologies, such as CN 105544865 B, a prestressed prefabricated composite irregular column is disclosed. Although prestressing tendons are also set in the irregular column, it requires on-site casting, resulting in a long construction period. The research and development of steel irregular column structures and steel irregular columns is relatively mature, and there are some actual projects. A common problem with steel structures is the need for large areas of steel plates, extensive welding and bolt connections, resulting in high costs and poor fire and corrosion resistance.

[0004] Currently, the primary method for precast rectangular columns both domestically and internationally is grouting sleeve connection. This method involves embedding pre-made sleeves within the precast concrete component, inserting reinforcing bars through the sleeves, and injecting grout to connect the bars. This technology is also the main method for mechanically connecting vertical reinforcing bars in precast components in China. Its disadvantages include a large number of rebar alignments, difficulty in controlling grouting quality, a lack of simple, efficient, and reliable grouting quality testing methods, and high cost. Furthermore, the height of the post-cast concrete zone at traditional column connection joints is generally within the beam height range, resulting in a large post-cast zone and significant use of formwork and wet work. Therefore, it is necessary to propose a more convenient and efficient construction structure.

[0005] On the other hand, there is very little research in the industry on precast concrete irregular column structures. Utility Model Content

[0006] To address the aforementioned problems of precast concrete irregular-shaped column structures, and to simultaneously resolve the issues of numerous steel reinforcement connections, difficulty in controlling connection quality, and high connection costs in existing precast shear wall systems, as well as to improve the energy dissipation and vibration reduction capabilities of the structure, this utility model provides a structure for layered, dry-connected concrete shear walls / irregular-shaped columns.

[0007] The technical solution to achieve the purpose of this utility model is:

[0008] This utility model provides a layered, dry-connected concrete shear wall / irregular column structure, including precast shear walls / irregular columns, precast beams, and composite slabs.

[0009] The precast shear wall / irregular column is precast in single-layer sections, including shear wall / irregular column body concrete, ordinary steel bars and several prestressed tendons;

[0010] The top of the precast shear wall / irregular column is flush with the lower edge of the floor slab of this floor, and the bottom is flush with the upper edge of the floor slab of the floor below. The post-cast concrete area of ​​the connection node of the precast shear wall / irregular column is only concentrated within the thickness of the slab.

[0011] The shear wall / irregular column concrete is provided with several longitudinally penetrating holes to accommodate prestressing tendons.

[0012] Ordinary reinforcing bars include interconnected stirrups and ordinary longitudinal bars. These ordinary reinforcing bars are only installed in shear walls / irregularly shaped columns, and are integrally cast with the concrete of the shear wall / irregularly shaped column, without penetrating the connection interface between the shear wall / irregularly shaped column segments.

[0013] The prestressed tendons run longitudinally through the entire length of the member and pass through the interface between the shear wall / irregular column segment.

[0014] Preferably, the upper end of the precast shear wall / irregular column is provided with a groove or rough surface, and also with several screws extending out of the surface; the lower end is provided with a raised shear key or rough surface, and also with a steel support extending out of the surface; the side intersecting with the precast beam is provided with a notch and short steel bars.

[0015] Preferably, the dry-connected concrete shear wall / irregular column structure is L-shaped, T-shaped, cross-shaped, Z-shaped, or I-shaped.

[0016] Preferably, each end of the layered dry-connected concrete shear wall / irregular column structure is provided with at least one hole, and the hole is matched with the prestressing tendon.

[0017] Preferably, the prestressing tendon is coaxial with the hole.

[0018] Preferably, temporary fixing nuts are provided at both ends of the prestressing tendons.

[0019] Preferably, the bottom longitudinal reinforcement of the precast beam extends from the end face. After the precast beam is installed in place, the bottom longitudinal reinforcement and the short steel bar are connected by a connector. The beam surface longitudinal reinforcement of the precast beam consists of fixed steel bars located in the middle of the beam and movable steel bars located at both ends of the beam. After the precast beam is installed in place, the movable steel bars are moved horizontally to the beam shear wall / irregular column joint area.

[0020] Preferably, connector two is disposed on the prestressing tendon, and sleeve is used to wrap connector two and the exposed prestressing tendon in the upper and lower layer connection area. The inner diameter of the sleeve is larger than the outer diameter of connector two and the diameter of the hole.

[0021] Preferably, after several precast shear walls / irregular columns are hoisted into place, the two ends of the precast beam are supported on the side corbels of the precast shear walls / irregular columns, and the composite slab is placed on the precast shear walls / irregular columns and the precast beam.

[0022] The above technical solution has the following beneficial effects: (1) The prefabricated shear wall / irregular column of this application is prefabricated in a single layer as a section, and the concrete shear wall / irregular column structure is installed in layers with dry connection. The structure is highly flexible and can be assembled in layers according to needs. It is suitable for use in low-rise and multi-story residential buildings.

[0023] (2) This utility model has an ingenious structure. Ordinary reinforcing bars do not penetrate the connection interface; only a small number of prestressed tendons do. On-site, the prefabricated component only needs to be hoisted into place, the prestressed tendons connected, and then tensioned. This reduces the number of reinforcing bar connections and connectors. The post-cast concrete zone of the prefabricated shear wall / irregular column connection node is concentrated within the slab thickness range, while the traditional post-cast concrete zone of the connection node is generally within the beam height range, and the beam thickness (i.e., height) is greater than the thickness of the cast-in-place slab. This solves the problems of numerous reinforcing bar connections, difficulty in controlling connection quality, high connection costs, and excessive on-site wet work in existing prefabricated assembled columns.

[0024] (3) Under the action of earthquake, the dry-connected concrete irregular column swings and opens along the bottom concave and convex joint, which can effectively reduce the impact of earthquake, play the role of energy dissipation and shock reduction, with minimal structural damage, and after the earthquake, it can be quickly restored to use through gravity and prestressed tendons to provide restoring force.

[0025] (4) The layered dry connection concrete shear wall / irregular column structure proposed in this utility model has a simple structure, is easy to install, and has good seismic performance, with obvious engineering advantages. The concrete of the shear wall / irregular column body is a finished product produced in the factory on demand, and does not need to be poured on-site during the construction process, which solves the technical problems of high cost and poor fire resistance and corrosion resistance caused by the use of steel irregular columns in the existing technology. Attached Figure Description

[0026] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0027] Figure 1 This is a schematic diagram of the layered installation dry-connection concrete shear wall / irregular column structure of this utility model;

[0028] Figure 2 This is a structural schematic diagram of the prefabricated shear wall / irregular column of this utility model;

[0029] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point B;

[0031] Figure 5 Cross-sectional view of a prefabricated irregular-shaped column (L-shaped);

[0032] Figure 6 The cross-section of the precast shear wall (L-shaped);

[0033] Figure 7 Cross-sectional view of a prefabricated irregular-shaped column (T-shape);

[0034] Figure 8 This is a cross-sectional view of a precast shear wall (T-shaped).

[0035] Figure 9 Cross-sectional view of a prefabricated irregular-shaped column (cross-shaped);

[0036] Figure 10 The cross-section of the precast shear wall (cross-shaped);

[0037] Figure 11 Cross-sectional view of a prefabricated irregular-shaped column (Z-shaped);

[0038] Figure 12 Cross-sectional view of a precast shear wall (Z-shaped);

[0039] Figure 13 Cross-sectional view of a prefabricated irregular-shaped column (I-shape);

[0040] Figure 14 For the cross-section of a precast shear wall (I-shaped);

[0041] Figure 15 This is a 3D view of the precast beam (the moving reinforcement 203 has not yet been moved to the beam-shear wall / irregular column joint area);

[0042] Figure 16 for Figure 15 Enlarged view of point C in the middle;

[0043] Figure 17 for Figure 1 3D view of node area at point D (movable rebar 203 has been moved to the beam-shear wall / irregular column node area).

[0044] Figure 18 This is a comparison diagram of the casting area in the prior art and the casting area in this application. Detailed Implementation

[0045] Example 1

[0046] See Figures 1 to 18The layered, dry-connected concrete shear wall / irregular column structure of this embodiment includes a precast shear wall / irregular column 1, a precast beam 2, and a composite slab 3.

[0047] The precast shear wall / irregular column 1 is precast in single-layer sections, including shear wall / irregular column concrete 101, ordinary steel bars 102 and several prestressed tendons 103;

[0048] The top of the precast shear wall / irregular column is flush with the lower edge of the floor slab of this floor, and the bottom is flush with the upper edge of the floor slab of the floor below. The post-cast concrete zone at the connection joint of the precast shear wall / irregular column is only concentrated within the slab thickness. In the existing technology, the precast beam has longitudinal reinforcement, and the precast beam is inserted before casting, so the cast-in-place zone (as shown in the attached diagram) is not included. Figure 18 As shown at point x, the pouring area extends from the bottom of the beam to the top of the floor slab. This pouring area is relatively high, resulting in a larger amount of formwork and wet work. In this application, the top of the prefabricated dry-connected concrete irregular column is flush with the lower edge of the current floor slab, and the bottom is flush with the upper edge of the floor slab below. Therefore, the pouring area of ​​this application (as shown in the attached diagram) is relatively large. Figure 18 As shown at point B, this will reduce the amount of templates used, saving template usage and improving efficiency.

[0049] The shear wall / irregular column concrete 101 is provided with several longitudinally penetrating holes 110 for accommodating prestressing tendons.

[0050] Ordinary reinforcing bars 102 include interconnected stirrups and ordinary longitudinal bars. These ordinary reinforcing bars 102 are only installed in shear walls / irregularly shaped columns, and are cast integrally with the concrete 101 of the shear wall / irregularly shaped column, without penetrating the connection interface between the shear wall / irregularly shaped column segment and the column.

[0051] The prestressed tendons run longitudinally through the entire length of the component and pass through the connection interface of the shear wall / irregular column segment. This utility model proposes a layered installation dry-connection concrete shear wall / irregular column structure. In this component, ordinary steel bars do not pass through the connection interface; only a small number of prestressed tendons do. On-site, the prefabricated component only needs to be hoisted into place, the prestressed tendons connected, and then tensioned. The number of steel bar connections is reduced, and the number of connectors is greatly decreased. This solves the problem of numerous steel bar connections and high connection costs in existing prefabricated assembled columns. The layered installation dry-connection concrete shear wall / irregular column structure is highly flexible, with a variety of cross-sectional forms, and can avoid protruding from the wall surface, solving the problem of rectangular columns protruding from the wall surface and affecting aesthetics. Under seismic action, the dry-connected concrete irregular column sways and opens along the bottom joint, effectively mitigating the impact of the earthquake, playing a role in energy dissipation and vibration reduction, with minimal structural damage. After an earthquake, the recovery force provided by gravity and prestressed tendons allows for rapid recovery and use. The layered installation dry-connection concrete shear wall / irregular column structure proposed in this utility model has a simple construction, convenient installation, and good seismic performance, exhibiting significant engineering advantages.

[0052] The precast shear wall / irregular column 1 is provided with a groove 104 or a rough surface at the upper end, and is also provided with a number of screws 106 extending out of the surface;

[0053] The lower end is provided with a raised shear key 108 or a rough surface, and a steel support 109 extending out of the surface is also provided;

[0054] A notch 111 and short steel bars 105 are provided on the side intersecting with the precast beam 2.

[0055] The dry-connected concrete shear wall / irregular column structure is L-shaped, T-shaped, cross-shaped, Z-shaped, or I-shaped.

[0056] Each end of the layered dry-connected concrete shear wall / irregular column structure is provided with at least one hole, and the hole is matched with the prestressing tendon.

[0057] The prestressed tendon 103 is coaxially arranged with the hole 110.

[0058] Temporary fixing nuts 107 are installed at both ends of the prestressing tendon 103.

[0059] The bottom longitudinal reinforcement 201 of the precast beam 2 extends from the end face. After the precast beam 2 is installed in place, the bottom longitudinal reinforcement 201 and the short steel bar 105 are connected by connector 204. The beam surface longitudinal reinforcement of the precast beam 2 consists of fixed steel bar 202 located in the middle of the beam and movable steel bar 203 located at both ends of the beam. After the precast beam 2 is installed in place, the movable steel bar 203 is moved horizontally to the beam shear wall / irregular column node area.

[0060] Connector 2 112 is disposed on the prestressing tendon, and the sleeve is used to wrap the connector 2 112 and the exposed prestressing tendon 103 in the upper and lower layer connection area. The inner diameter of the sleeve is larger than the outer diameter of connector 2 112 and the diameter of hole 110.

[0061] After several precast shear walls / irregular columns 1 are hoisted into place, the two ends of the precast beam 2 are supported on the side brackets 113 of the precast shear walls / irregular columns 1, and the composite slab 3 is placed on the precast shear walls / irregular columns 1 and the precast beam 2.

[0062] During implementation, the layered installation of dry-connected concrete shear walls / irregularly shaped columns includes the following steps:

[0063] Step 1: Precast shear wall / irregular column 1, precast beam 2, and composite slab 3 for each single layer and transport them to the construction area;

[0064] Install the first-floor precast shear wall / irregular column 1, and install corbel 113 on the side of the first-floor precast shear wall / irregular column 1 that intersects with the precast beam 2 as a temporary support for the precast beam 2;

[0065] Step 2: Install the precast beam 2 of this floor, and connect the bottom longitudinal reinforcement 201 of the precast beam and the short steel bars 105 set on the precast shear wall / irregular column through connector 204; install the composite slab 3; remove the temporary fixing nuts 107 at the top of the precast shear wall / irregular column 1;

[0066] Step 3: Hoist the upper precast shear wall / irregular column 1 into place, so that the threaded rod 106 extending from the upper part of the lower precast shear wall / irregular column 1 passes through the round hole of the bottom steel support 109 of the upper precast shear wall / irregular column 1; adjust and fix the bottom steel support 109; connect the prestressed tendons 103 of the upper and lower layers with connector 2 112;

[0067] Step 4: Install the sleeves around the prestressed tendons 103 at the connection between the upper and lower precast shear walls / irregular columns 1; move the movable steel bars 203 of the precast beam 2 to the beam-shear wall / irregular column joint area; and place the surface steel bars of the composite slab 3.

[0068] Step 5: Install the formwork; pour the concrete for the floor slab surface layer.

[0069] Step 6: Complete the installation of the entire building structure in a loop; tension the prestressed tendons 103 at the top of the precast shear wall / irregular column 1 in one go and lock them, thus completing the structural construction.

[0070] This application solves the problem of installation method for prefabricated irregular column structures, and also solves the problems of large number of steel reinforcement connections, difficulty in controlling connection quality, and high connection cost in existing prefabricated shear walls, thereby improving the energy dissipation and vibration reduction of the structure.

[0071] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A structure for layered installation of dry-connected concrete shear walls / irregularly shaped columns, characterized in that: It includes precast shear walls / irregular columns (1), precast beams (2) and composite slabs (3). The precast shear wall / irregular column (1) is precast in a single layer as a section, including shear wall / irregular column body concrete (101), ordinary steel bars (102) and several prestressed tendons (103). The top of the precast shear wall / irregular column is flush with the lower edge of the floor slab of this floor, and the bottom is flush with the upper edge of the floor slab of the next floor. The post-cast concrete area of ​​the connection node of the precast shear wall / irregular column is only concentrated within the thickness of the slab. The shear wall / irregular column concrete (101) is provided with several longitudinal through holes (110) for accommodating prestressing tendons. The ordinary reinforcing bars (102) include interconnected stirrups and ordinary longitudinal bars. The ordinary reinforcing bars (102) are only provided in the shear wall / irregular column body and are cast integrally with the concrete (101) of the shear wall / irregular column body, without penetrating the connection interface of the shear wall / irregular column segment. The prestressed tendons run longitudinally through the entire length of the member and pass through the interface between the shear wall / irregular column segment.

2. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 1, characterized in that: The precast shear wall / irregular column (1) is provided with a groove (104) or a rough surface at the upper end, and is also provided with a number of screws (106) extending out of the surface. The lower end is provided with a raised shear key (108) or a rough surface, and a steel support (109) extending out of the surface is also provided; a notch (111) and short steel bars (105) are provided on the side that intersects with the precast beam (2).

3. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 1, characterized in that: The dry-connected concrete shear wall / irregular column has an L-shaped, T-shaped, cross-shaped, Z-shaped, or I-shaped structure.

4. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 1, characterized in that: Each end of the layered dry-connected concrete shear wall / irregular column structure is provided with at least one hole, which is matched with the prestressing tendons.

5. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 1, characterized in that: The prestressed tendon (103) is coaxially arranged with the hole (110).

6. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 1, characterized in that: Temporary fixing nuts (107) are installed at both ends of the prestressed tendon (103).

7. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 1, characterized in that: The bottom longitudinal reinforcement (201) of the precast beam (2) extends from the end face. After the precast beam (2) is installed in place, the bottom longitudinal reinforcement (201) and the short steel bar (105) are connected by connector one (204). The beam surface longitudinal reinforcement of the precast beam (2) consists of fixed steel bar (202) located in the middle of the beam and movable steel bar (203) located at both ends of the beam. After the precast beam (2) is installed in place, the movable steel bar (203) is moved horizontally to the beam shear wall / irregular column node area.

8. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 7, characterized in that: Connector 2 (112) is provided on the prestressed tendon, and the sleeve is used to wrap the connector 2 (112) and the exposed prestressed tendon (103) in the upper and lower layer connection area. The inner diameter of the sleeve is larger than the outer diameter of connector 2 (112) and the diameter of the hole (110).

9. The structure for layered installation of dry-connected concrete shear walls / irregular columns according to claim 7, characterized in that: After several precast shear walls / irregular columns (1) are hoisted into place, the two ends of the precast beam (2) are supported on the side corbels (113) of the precast shear walls / irregular columns (1), and the composite slab (3) is placed on the precast shear walls / irregular columns (1) and the precast beam (2).

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