Prefabricated reinforced concrete shear wall interlayer vertical connecting structure

Abstract

This utility model relates to a vertical connection structure between precast reinforced concrete shear walls, including an upper wall connector, a lower wall connector, and an installation groove. The upper wall connector includes two first vertical plates and a horizontal plate. One end of each of the two first vertical plates and the horizontal plate are fixed to the upper shear wall. The lower wall connector includes a second vertical plate. One end of the second vertical plate is fixed to the lower shear wall. The installation groove is located between the upper and lower shear walls. The other ends of each of the two first vertical plates are located in the installation groove, and the other end of the second vertical plate is engaged between the two first vertical plates. The two first vertical plates and the second vertical plate are fixedly connected by fasteners. The installation groove is filled with reinforcing material. This utility model uses a combination of upper and lower wall connectors to connect the upper and lower shear walls, ensuring the passage of longitudinal reinforcement in the shear walls and ensuring good interlocking between the reinforcing material and the upper and lower shear walls, thereby improving shear and compressive bearing capacity.

Description

Technical Field

[0001] This utility model relates to the field of building structure technology, specifically to a precast reinforced concrete shear wall inter-story vertical connection structure. Background Technology

[0002] In the vertical connection between precast reinforced concrete shear walls, reliability is paramount. Traditional methods use grouted anchor sleeves, but their quality is undetectable, and their safety is difficult to ascertain after construction. Related technologies employ T-shaped steel plate connectors for fixing, but this method prevents the longitudinal reinforcement of the shear wall from passing through. Furthermore, the T-shaped steel plate connectors divide the post-cast concrete layer between the upper and lower precast shear walls into multiple pieces, reducing its load-bearing capacity compared to intact concrete. Additionally, the smooth surface of the steel plate does not meet the requirement of a rough surface at the contact point between the post-cast layer and the precast shear wall, significantly reducing the bonding strength of the contact surfaces and weakening both shear and compressive bearing capacity to varying degrees. Utility Model Content

[0003] Based on the above description, this utility model provides a precast reinforced concrete shear wall interlayer vertical connection structure, which uses a combination of upper wall connectors and lower wall connectors to connect the upper and lower shear walls, ensuring that the longitudinal reinforcement of the shear wall can pass through, and ensuring that the reinforcement material has good interlocking with the upper and lower shear walls, thereby improving the shear and compressive bearing capacity.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A precast reinforced concrete shear wall inter-story vertical connection structure for connecting an upper shear wall and a lower shear wall, comprising: The upper wall connector includes two first vertical plates spaced at a certain distance and a horizontal plate disposed between the two first vertical plates. The two ends of the horizontal plate are respectively fixedly connected to the two first vertical plates, and one end of the two first vertical plates and the horizontal plate are fixed to the upper shear wall. The lower wall connector includes a second vertical plate, one end of which is fixed to the lower shear wall; An installation groove is provided between the upper shear wall and the lower shear wall. The other ends of the two first vertical plates are both located in the installation groove, and the other end of the second vertical plate is locked between the two first vertical plates. The two first vertical plates and the second vertical plate are fixedly connected by fasteners, and the installation groove is filled with reinforcing material.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, the number of the fasteners is one or more; When there are multiple fasteners, the multiple fasteners are evenly arranged at a certain distance along the extension direction of the horizontal plate.

[0007] Furthermore, a post-cast layer is provided between the mounting groove and the lower shear wall, and the post-cast layer is filled with reinforcing material.

[0008] Furthermore, the fastener is a high-strength bolt, which passes through one of the first vertical plates, the second vertical plate, and another of the first vertical plates in sequence.

[0009] Furthermore, it also includes: The first shear key is provided on the upper shear wall and passes through the two first vertical plates. The first shear key is located on the side of the horizontal plate away from the lower shear wall.

[0010] Furthermore, the number of the first shear-resistant keys is one or more; When there are multiple first shear keys, the multiple first shear keys are evenly arranged at a certain distance along the extension direction of the first vertical plate.

[0011] Furthermore, it also includes: The second shear key is provided in the lower shear wall and passes through the second vertical plate.

[0012] Furthermore, the number of the second shear bond is one or more; When there are multiple second shear keys, the multiple second shear keys are evenly arranged at a certain distance along the extension direction of the second vertical plate.

[0013] Furthermore, both the upper shear wall and the upper shear wall include a plurality of longitudinal steel bars for shear walls and reinforcing materials cast into the longitudinal steel bars of the shear walls, and additional stirrups are tied around the periphery of the plurality of longitudinal steel bars of the shear walls.

[0014] Furthermore, the reinforcing material is grout or fine aggregate concrete.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: (1) The precast reinforced concrete shear wall interlayer vertical connection structure provided in this embodiment uses a combination of upper wall connectors and lower wall connectors to connect the upper shear wall and the lower shear wall. It does not require precise alignment with the longitudinal reinforcement of the shear wall reserved in the upper and lower shear walls. It is an exposed installation, with low construction difficulty and reliable construction quality.

[0016] (2) The precast reinforced concrete shear wall interlayer vertical connection structure provided in this embodiment is a fixed connection between two first vertical plates and a second vertical plate by fasteners. The connection is completed by only a few connecting plates. When multiple vertical connection structures are required, the gap between adjacent vertical connection structures is large, which can fully meet the requirements for the longitudinal reinforcement of the vertical precast shear wall to pass through.

[0017] (3) The precast reinforced concrete shear wall inter-story vertical connection structure provided in this embodiment can be used to position the upper shear wall by clamping the other end of the second vertical plate between the two first vertical plates, since the upper shear wall may sway from side to side during hoisting. The connection of the fixing member between the two second vertical plates and the plate has two shear surfaces, which is a double shear connection of the fixing member. The bearing capacity is twice that of a single shear connection. Attached Figure Description

[0018] Figure 1 This is an elevation view of the completed connection and installation of this utility model; Figure 2 for Figure 1 AA cross-section view; Figure 3 for Figure 1 BB cross-section; Figure 4 for Figure 3 Schematic diagram of the hoisting process; Figure 5(a) is a schematic diagram of the upper wall connector; Figure 5(b) is a CC cross-sectional view of Figure 5(a); Figure 5(C) is a DD cross-sectional view of Figure 5(a); Figure 6 This is a schematic diagram of the lower wall connectors; Figure 7(a) is a cross-sectional view when the first shear key is added; Figure 7(b) is a cross-sectional view when a second shear key is added; Figure 8 This is a cross-sectional view of EE in Figure 7; Figure 9 An elevation view showing the installation of additional stirrups; Figure 10 for Figure 9 FF cross-section; The attached diagram lists the components represented by each number as follows: 1. Upper shear wall; 2. Lower shear wall; 3. Post-cast layer; 4. Upper wall connector; 4a. First vertical plate; 4b. Horizontal plate; 5. Lower wall connector; 5a. Second vertical plate; 6. Fixing component; 7. Mounting groove; 8. Longitudinal reinforcement of shear wall; 9. Bolt hole; 10. First shear key; 11. Additional stirrups; 12. Second shear key. Detailed Implementation

[0019] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0021] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0022] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0023] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0024] Example 1 This embodiment provides a precast reinforced concrete shear wall inter-story vertical connection structure, such as... Figures 1-6As shown, the component used to connect the upper shear wall 1 and the lower shear wall 2 includes an upper wall connector 4, a lower wall connector 5, and a mounting groove 7.

[0025] The upper wall connector 4 includes two first vertical plates 4a spaced at a certain distance and a horizontal plate 4b disposed between the two first vertical plates 4a. The two ends of the horizontal plate 4b are fixedly connected to the two first vertical plates 4a respectively. One end of the two first vertical plates 4a and the horizontal plate 4b are fixed to the upper shear wall 1.

[0026] The lower wall connector 5 includes a second vertical plate 5a, one end of which is fixed to the lower shear wall 2.

[0027] The mounting groove 7 is located between the upper shear wall 1 and the lower shear wall 2. The other ends of the two first vertical plates 4a are located in the mounting groove 7, and the other end of the second vertical plate 5a is locked between the two first vertical plates 4a. The two first vertical plates 4a and the second vertical plate 5a are fixedly connected by fasteners 6. The mounting groove 7 is filled with reinforcing material.

[0028] This embodiment provides a precast reinforced concrete shear wall inter-story vertical connection structure for connecting the upper shear wall 1 and the lower shear wall 2, specifically including: Step 1: Fabricate the upper wall connector 4; Step 2: Construct the upper shear wall 1, and at the same time embed the upper wall connector 4 into the bottom of the upper shear wall 1 and reserve the installation groove 7 in the corresponding position; Step 3: Fabricate the lower wall connector 5; Step 4: Construct the lower shear wall 2, and simultaneously embed the lower wall connector 5 into the top of the lower shear wall 2; Step 5: Install the lower shear wall 2 on site; Step 6: Hoist the upper shear wall 1 and temporarily fix the upper shear wall 1 with fasteners 6; Step 7: After adjusting the installation error of the upper shear wall 1 and the lower shear wall 2, fix the fastener 6. Step 8: Pour reinforcement material into installation groove 7 to complete the installation.

[0029] In this embodiment, the upper wall connector 4 and the lower wall connector 5 are combined to connect the upper shear wall 1 and the lower shear wall 2. The combination of the upper wall connector 4 and the lower wall connector 5 does not require precise alignment with the longitudinal steel bars 8 of the shear wall reserved in the upper shear wall 1 and the lower shear wall 2. It is an exposed installation, which is easy to construct and has reliable construction quality.

[0030] In this embodiment, the two first vertical plates 4a and the second vertical plate 5a are fixedly connected by fasteners 6, and the connection is completed with only a few connecting plates. When multiple vertical connection structures are required, the gap between adjacent vertical connection structures is large, which can fully meet the requirements for the passage of the longitudinal steel bars 8 of the vertically prefabricated shear wall.

[0031] In addition, in this embodiment, since the upper shear wall 1 may sway left and right when it is hoisted, the other end of the second vertical plate 5a is clamped between the two first vertical plates 4a to facilitate the positioning of the upper shear wall 1. The fastener 6 that clamps a plate between the two second vertical plates 5a has two shear surfaces, which is a double shear connection of the fastener 6, and the bearing capacity is twice that of a single shear connection.

[0032] In some embodiments of this example, in order to improve the load-bearing capacity, the first vertical plate 4a, the horizontal plate 4b, and the second vertical plate 5a are made of high-strength steel or composite plates. The high-strength steel is selected from Q355 or Q420, which can improve the tensile and compressive strength of the first vertical plate 4a, the horizontal plate 4b, and the second vertical plate 5a. The composite plates are selected from aluminum-magnesium-manganese alloy plates and fiber-reinforced steel plates, which can balance lightweight and high strength.

[0033] In some embodiments of this example, in order to improve the load-bearing capacity, the fastener 6 is a high-strength bolt. Bolt holes 9 are drilled in the first vertical plate 4a, the second vertical plate 5a and the other first vertical plate 4a, so that the high-strength bolt passes through one first vertical plate 4a, the second vertical plate 5a and the other first vertical plate 4a in sequence.

[0034] In some embodiments of this example, an enlarged flat washer is added between the high-strength bolt and the first vertical plate 4a and the second vertical plate 5a to increase the stress diffusion area. If the first vertical plate 4a and / or the second vertical plate 5a are relatively thin, a steel collar can be added between the high-strength bolt and the first vertical plate 4a and the second vertical plate 5a to prevent the first vertical plate 4a and / or the second vertical plate 5a from being crushed by the high-strength bolt.

[0035] Thus, after taking certain measures for the fixing component 6, the present invention has a high degree of suitability for the manufacturing and on-site installation errors of the upper shear wall 1 and the lower shear wall 2.

[0036] In some embodiments of this example, the number of fasteners 6 is one or more, and this example does not limit this.

[0037] In some embodiments of this example, when there are multiple fasteners 6, the multiple fasteners 6 are evenly arranged at a certain distance along the extension direction of the horizontal plate 4b.

[0038] In this embodiment, one or more rows of fasteners 6 are evenly arranged at a certain distance along the extension direction of the horizontal plate 4b, which can further improve the load-bearing capacity.

[0039] In some embodiments of this example, a post-cast layer 3 is provided between the mounting groove 7 and the lower shear wall 2 to ensure that the upper shear wall 1, the mounting groove 7 and the lower shear wall 2 form a continuous structural system, and the post-cast layer 3 is filled with reinforcing material.

[0040] In some embodiments of this example, the reinforcing material is grout or fine aggregate concrete.

[0041] In some embodiments of this example, adjacent vertical connection structures are welded together by horizontal purlins to further improve load-bearing capacity.

[0042] In this embodiment, the horizontal plate 4b of the upper wall connector 4 must ensure that there is a certain distance between it and the upper surface of the upper wall connector 4 after installation. This distance is calculated based on the stress condition of the shear wall to avoid the two upper wall connectors 4 and the lower wall connector 5 being compressed and stressed in advance before the upper shear wall 1 and the high-strength bolts are stressed.

[0043] For the high-strength bolts required by this utility model, when there is a large error in on-site construction, the bolt hole 9 can be an elongated oval hole to enhance the adaptability to on-site errors, or a large oval hole with a cover plate can be used to further improve the adaptability to on-site errors. After installation, the cover plate needs to be welded to the first vertical plate 4a and the second vertical plate 5a.

[0044] In summary, by pre-embedding the upper wall connector 4 and lower wall connector 5 during the construction of the upper shear wall 1 and lower shear wall 2, on-site construction can be completed simply by installing high-strength bolts and then grouting the installation groove 7 and the post-cast layer 3. This fully utilizes the high shear strength of the high-strength bolts, significantly reducing the number of connection points, making construction convenient and fast. Furthermore, the inspection of high-strength bolt connections is very convenient, and construction quality is easily guaranteed. If the shear wall needs to be demolished, only the post-cast layer 3 thickness needs to be removed to remove the high-strength bolts.

[0045] Example 2 To prevent relative slippage or shear failure between the upper shear wall 1 and the lower shear wall 2, in some embodiments of this example, as shown in Figure 7- Figure 8 As shown, it also includes: The first shear key 10 is provided on the upper shear wall 1 and passes through two first vertical plates 4a. The first shear key 10 is provided on the side of the horizontal plate 4b away from the lower shear wall 2. The second shear key 12 is provided in the lower shear wall 2 and passes through the second vertical plate 5a.

[0046] In some embodiments of this example, the number of first shear keys 10 is one or more. When there are multiple first shear keys 10, the multiple first shear keys 10 are evenly arranged along the extension direction of the first vertical plate 4a.

[0047] In some embodiments of this example, the number of second shear keys 12 is one or more. When there are multiple second shear keys 12, the multiple second shear keys 12 are evenly arranged along the extension direction of the second vertical plate 5a.

[0048] In this embodiment, both the first shear key 10 and the second shear key 12 are shear studs.

[0049] Thus, by setting the first shear key 10 and the second shear key 12, the anchoring force of the first vertical plate 4a and the second vertical plate 5a in the concrete is increased, preventing the first vertical plate 4a and the second vertical plate 5a from being pulled out. There are different installation methods depending on the type, such as shear studs being directly welded on.

[0050] The upper wall connector 4 and lower wall connector 5 required by this utility model need to be pre-embedded in the upper shear wall 1 and lower shear wall 2 respectively when the upper shear wall 1 and lower shear wall 2 are manufactured. When the shear force of the upper shear wall 1 and lower shear wall 2 is large, shear studs or the like can be added to increase their shear resistance with the reinforcement material.

[0051] Example 3 In some implementations of this embodiment, such as Figure 9 and Figure 10 As shown, both the upper shear wall 1 and the lower shear wall 2 include several longitudinal steel bars 8 and reinforcing materials cast on the longitudinal steel bars 8. Additional stirrups 11 are tied around the periphery of the longitudinal steel bars 8. By densifying the additional stirrups 11, the shear bearing capacity of the upper shear wall 1 and the lower shear wall 2 is directly improved.

[0052] Specifically, the spacing, size, shape, thickness and bolt specifications of the connectors required in this embodiment are determined by calculation. When the spacing of the connectors is too large or the mounting groove 7 is too large when using large-diameter bolts, the upper wall connector 4 can be anchored on three sides in the upper shear wall 1 instead of only anchored in the upper shear wall 1. Additional stirrups 11 are set in the shear wall between the mounting grooves 7 to strengthen the upper shear wall 1.

[0053] The embodiments are merely illustrative of the prominent features of this utility model and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description, and any such modifications without creative innovation fall within the protection scope of this utility model.

Claims

1. A precast reinforced concrete shear wall inter-story vertical connection structure for connecting an upper shear wall and a lower shear wall, characterized in that, include: The upper wall connector includes two first vertical plates spaced at a certain distance and a horizontal plate disposed between the two first vertical plates. The two ends of the horizontal plate are respectively fixedly connected to the two first vertical plates, and one end of the two first vertical plates and the horizontal plate are fixed to the upper shear wall. The lower wall connector includes a second vertical plate, one end of which is fixed to the lower shear wall; An installation groove is provided between the upper shear wall and the lower shear wall. The other ends of the two first vertical plates are both located in the installation groove, and the other end of the second vertical plate is locked between the two first vertical plates. The two first vertical plates and the second vertical plate are fixedly connected by fasteners, and the installation groove is filled with reinforcing material.

2. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 1, characterized in that: The number of the fasteners is one or more; When there are multiple fasteners, the multiple fasteners are evenly arranged at a certain distance along the extension direction of the horizontal plate.

3. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 1, characterized in that: A post-cast layer is also provided between the installation groove and the lower shear wall, and the post-cast layer is filled with reinforcement material.

4. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 1, characterized in that: The fastener is a high-strength bolt, which passes through one of the first vertical plates, the second vertical plate, and another of the first vertical plates in sequence.

5. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 1, characterized in that, Also includes: The first shear key is provided on the upper shear wall and passes through the two first vertical plates. The first shear key is located on the side of the horizontal plate away from the lower shear wall.

6. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 5, characterized in that: The number of the first shear keys is one or more; When there are multiple first shear keys, the multiple first shear keys are evenly arranged at a certain distance along the extension direction of the first vertical plate.

7. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 1, characterized in that, Also includes: The second shear key is provided in the lower shear wall and passes through the second vertical plate.

8. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 7, characterized in that: The number of the second shear key is one or more; When there are multiple second shear keys, the multiple second shear keys are evenly arranged at a certain distance along the extension direction of the second vertical plate.

9. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 1, characterized in that: Both the upper shear wall and the upper shear wall include a number of longitudinal steel bars for the shear wall and reinforcing materials cast into the longitudinal steel bars of the shear wall, and additional stirrups are tied around the outer periphery of the longitudinal steel bars of the shear wall.

10. The precast reinforced concrete shear wall inter-story vertical connection structure according to claim 1, characterized in that: The reinforcement material is grout or fine aggregate concrete.

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