Fabricated shear wall horizontal joint
By using a combined connection between U-shaped steel bars and low yield steel parts in the prefabricated shear wall structure, the problem of insufficient bearing capacity, ductility and energy consumption capacity of nodes is solved, and higher building performance and simplified construction results are achieved.
Patent Information
- Application Number
- CN202422048210.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-08-22
AI Technical Summary
The nodes of the existing prefabricated shear wall structures have shortcomings in bearing capacity, stiffness, ductility and energy consumption capacity, which affect the overall performance and construction difficulty of the building.
The combined connection method of U-shaped steel bars and low-yield steel parts is adopted. By configuring U-shaped steel bars in the edge component area of the shear wall, and prefabricating low-yield steel parts in the factory, including upper and lower steel plates and intermediate low-yield steel sleeves, low-yield steel parts are formed, and combined with the casting of high-performance mortar, reliable connection between upper and lower wall panels is achieved.
It improves the bearing capacity, ductility and energy consumption capacity of the nodes, simplifies the construction process, reduces on-site workload, and improves construction efficiency.
Smart Images
Figure CN223074973U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of building technology, and particularly relates to a horizontal joint of a precast shear wall and a method thereof. Background Art
[0002] The statements herein only provide background art related to the utility model and do not necessarily constitute prior art.
[0003] The precast shear wall structure refers to a structural system that uses precast concrete wall panels to replace the columns and beams in the structure. The assembled monolithic shear wall structure has a relatively high degree of industrialization, and its advantages are good integrity, high bearing capacity, small lateral displacement, and good seismic performance. The disadvantage of this structure is its complex structure and high construction difficulty.
[0004] The connection joints of the precast structure are the key parts of the whole structure. Only when the quality of the connection points is guaranteed can the quality of the precast building be ensured.
[0005] At present, the bearing capacity and stiffness of the joints can better meet the requirements, but their ductility and energy dissipation capacity cannot be greatly improved. Relevant measures should be taken to ensure the bearing capacity, stiffness, ductility, and energy dissipation capacity of the joints to ensure the smooth implementation of the precast building. Summary of the Utility Model
[0006] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a horizontal joint of a precast shear wall and a method thereof. The precast shear wall horizontal joint makes the connection between the upper and lower precast wall panels reasonable and reliable, greatly improves the bearing capacity and ductility, has good mechanical properties, and can reduce the on-site workload.
[0007] To achieve the above purpose, the utility model is realized through the following technical solutions:
[0008] In the first aspect, the utility model provides a horizontal joint of a precast shear wall, including arranging U-shaped steel bars in the edge member area of the shear wall without pouring concrete. The U-shaped steel bars extend beyond the middle area of the shear wall in the whole length for connection through precast low-yield steel members; the extended length is determined by the height of the precast low-yield steel members; the precast low-yield steel members are composed of an upper steel plate, a lower steel plate, and a middle low-yield steel sleeve. The upper and lower steel plate parts of the low-yield steel members are closely attached to the transverse part of the U-shaped steel members, and the middle low-yield steel sleeve part wraps the vertical part of the U-shaped steel bars.
[0009] As a further technical solution, the longitudinal part of the U-shaped steel bars serves as the longitudinal bars arranged inside the shear wall.
[0010] As a further technical solution, the longitudinal part of the U-shaped steel bars is fixed by stirrups inside the shear wall.
[0011] As a further technical solution, the U-shaped steel bars are arranged staggeredly in the upper and lower wall panels for subsequent connection with the intermediate steel sleeves.
[0012] As a further technical solution, the U-shaped steel bars of the upper and lower wall panels form a rectangular steel bar ring in the shear wall edge member area.
[0013] As a further technical solution, the upper steel plate and the lower steel plate of the prefabricated low-yield steel member are made of ordinary steel, and the intermediate low-yield sleeve is made of low-yield point steel.
[0014] As a further technical solution, the upper steel plate, the lower steel plate and the intermediate low-yield sleeve of the prefabricated low-yield steel member are all prefabricated in the factory.
[0015] As a further technical solution, the upper steel plate and the lower steel plate of the prefabricated low-yield steel member are ordinary steel plates with equal thickness, and oval holes are cut on their surfaces. The shape of the holes is the same as the outer surface of the intermediate sleeve.
[0016] As a further technical solution, the intermediate sleeve is formed by butting two C-shaped half cylinders.
[0017] As a further technical solution, the prefabricated low-yield steel member is welded and connected after being assembled and fixed.
[0018] In the second aspect, the present invention also provides an installation method for the assembled shear wall horizontal joint as described above, including the following steps:
[0019] Install and fix the upper and lower prefabricated wall panels, and pour high-performance mortar in the intermediate area;
[0020] When installing the upper and lower ordinary steel plates, three workers are required to operate simultaneously. One worker makes the longitudinal part of the rectangular steel bar ring assembled by the U-shaped steel bars pass through the reserved channel of the upper steel plate in the way of first standing up and then laying it horizontally; the second worker installs the lower steel plate in the same way; the third worker installs the intermediate low-yield steel sleeve between the reserved holes and the U-shaped steel bars, ties the intermediate low-yield steel sleeve with iron wire, temporarily fixes the upper and lower ordinary steel plates, and welds and connects the upper and lower ordinary steel plates and the intermediate low-yield steel sleeve to form a low-yield steel member.
[0021] Pour post-cast concrete in the shear wall edge member area.
[0022] Compared with the related technology, the clamping firm fixture device for the mechanical testing machine provided by the present invention has the following beneficial effects:
[0023] For the assembled shear wall horizontal joint of the present invention, the ductility and energy dissipation capacity are improved through the low-yield steel member. The yield point of the low-yield steel member is extremely low, and it has good ductility after yielding, so that the ductility of the joint is improved.
[0024] For the horizontal joint of the prefabricated shear wall of the present utility model, the circular steel pipe in the middle part of the steel member wraps the steel bars, so that the steel bars have no bond with the concrete, forming a non-bonded section with the steel bars. The steel bars in the non-bonded section can deform freely along the length direction of the steel bars, making the yield displacement and ultimate displacement of the non-bonded reinforced concrete structure greater than those of the cast-in-place reinforced concrete structure, and the ductility is improved.
[0025] For the horizontal joint of the prefabricated shear wall of the present utility model, when the U-shaped steel bars are stressed, the positional relationship with the low-yield steel members and the concrete forms a constraint, greatly improving the bearing capacity of the joint.
[0026] For the horizontal joint of the prefabricated shear wall of the present utility model, the production work of the steel members is all completed in the factory, which can save a large amount of human resources, increase the construction efficiency; reduce the consumption of human resources on site, and there is no complex installation operation, which can reduce the requirements for construction technicians. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The schematic diagrams forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.
[0028] Figure 1 It is the overall schematic diagram of the horizontal joint of the prefabricated shear wall of the present utility model;
[0029] Figure 2 It is the staggered position diagram of the U-shaped steel bars of the horizontal joint of the prefabricated shear wall of the present utility model;
[0030] Figure 3 It is the layout diagram of the low-yield steel members of the horizontal joint of the prefabricated shear wall of the present utility model;
[0031] Figure 4 It is the overall diagram of the low-yield steel members of the horizontal joint of the prefabricated shear wall of the present utility model;
[0032] Figure 5 It is the schematic diagram of the horizontal single joint of the prefabricated shear wall of the present utility model;
[0033] Figure 6 It is the front view of the horizontal joint of the prefabricated shear wall of the present utility model;
[0034] Figure 7 It is the side view of the horizontal joint of the prefabricated shear wall of the present utility model;
[0035] Figure 8 It is the layout diagram of the U-shaped steel bars of the multi-wall panels of the horizontal joint of the prefabricated shear wall of the present utility model;
[0036] In the figure: the distances or dimensions between each part are exaggerated for showing the positions of each part, and the schematic diagrams are only for illustration;
[0037] Among them, 1 is the upper wall body, 2 is the lower wall body, 3 is the U-shaped steel bar, 4 are the upper and lower ordinary steel plates, 5 is the middle low-yield steel sleeve, 6 is the post-cast high-performance mortar, 7 is the upper steel plate, 8 is the lower steel plate, 9 is the C-shaped low-yield half sleeve, 10 is the rectangular channel, 11 is the rectangular steel bar framework, 12 is the horizontal part of the U-shaped steel bar, 13 is the longitudinal part of the U-shaped steel bar, 14 is the shear wall edge member area, 15 is the middle area of the shear wall, and 16 is the low-yield steel member. Specific embodiments
[0038] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.
[0039] In a typical embodiment of the present utility model, as Figures 1-7 shown, a prefabricated shear wall horizontal joint is proposed, including an upper wall body 1, a lower wall body 2, a U-shaped steel bar 3, upper and lower ordinary steel plates 4, a middle low-yield steel sleeve 5, a post-cast high-performance mortar 6, an upper steel plate 7, a lower steel plate 8, a C-shaped low-yield half sleeve 9, a rectangular channel 10, a rectangular steel bar framework 11, a horizontal part 12 of the U-shaped steel bar, a longitudinal part 13 of the U-shaped steel bar, and a low-yield steel member 16; wherein, U-shaped steel bars 3 are arranged at the ends of the longitudinal bars in the edge member area 13 of the upper wall body 1 and the lower wall body 2, and the upper and lower steel plates 4 and the middle low-yield steel sleeve 5 form a low-yield steel member 16.
[0040] The through-length part of the longitudinal bars of the U-shaped steel bar 3 is fixed by stirrups in the upper wall body 1 and the lower wall body 2, and the U-shaped steel bars 3 are arranged staggered and closely attached in the edge member area 13 of the upper wall body 1 and the lower wall body 2, such as an example Figure 8 .
[0041] The length of the extension of the longitudinal part 13 of the U-shaped steel bar outside the shear wall edge member area is determined by the length of the middle low-yield steel sleeve 5; specifically, the length of the middle low-yield steel sleeve 5 is slightly less than the length of the longitudinal part 13 of the U-shaped steel bar for subsequent installation work.
[0042] The U-shaped steel bars 3 of the upper and lower wall bodies are arranged staggered and closely attached, forming a rectangular channel 10 and a rectangular steel bar framework 11 in the edge member area 12. The upper steel plate 7 passes through the rectangular channel 10 and is placed vertically first and then horizontally to be closely attached to the horizontal part 12 of the U-shaped steel bar. The lower steel plate 8 passes through the rectangular channel 10 and is installed in the same way to be closely attached to the horizontal part 12 of the U-shaped steel bar. Then, two C-shaped low-yield half sleeves 9 are installed to form a low-yield steel member 16. Finally, the middle low-yield steel sleeve 5 is tied with wire and the low-yield steel member 16 is temporarily fixed, and the low-yield steel member 16 is formed by welding the upper and lower ordinary steel plates 4 and the middle low-yield steel sleeve 5.
[0043] The upper and lower ordinary steel plates 4 are prefabricated in the factory. During fabrication, the contour of the outer surface of the middle low-yield steel sleeve 5 is cut out on the whole ordinary steel plate 4. Specifically, the thickness of the upper and lower ordinary steel plates 4 is 10 mm, and the wall thickness of the middle low-yield steel sleeve is 8 mm. The diameter of the steel bars used, plus the wall thickness of the steel sleeve, is used to determine the size of the elliptical holes to be cut out on the upper and lower ordinary steel plates 4.
[0044] The construction technology of the horizontal joint of this prefabricated shear wall is mature and convenient for construction, greatly reducing the construction time. Due to the function of the low-yield steel parts in terms of material and position, the bearing capacity, ductility and energy dissipation capacity of the components are greatly increased.
[0045] The assembly sequence of each component of the horizontal joint of this prefabricated shear wall is as follows:
[0046] First, fix the upper and lower shear wall wall panels and pour high-performance mortar in the middle area.
[0047] Second, adjust the position of the U-shaped steel bars. One worker makes the longitudinal part of the rectangular steel bar ring assembled by the U-shaped steel bars pass through the reserved channel of the upper steel plate in the way of first standing up and then laying it horizontally; the second worker installs the lower steel plate in the same way; the third worker installs the middle steel sleeve between the reserved holes and the U-shaped steel bars, ties the middle sleeve with iron wire, and temporarily fixes the low-yield steel parts, and connects the upper and lower ordinary steel plates and the middle low-yield steel sleeve by welding to form the low-yield steel parts.
[0048] Third, pour post-cast concrete in the edge member area of the shear wall.
[0049] Through the above construction procedures of the joint, the construction and on-site installation of the entire shear wall joint structure are completed.
[0050] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. An assembled shear wall horizontal joint, characterized in that The longitudinal bars at the ends of the longitudinal bars in the upper wall body and the lower wall body edge member area are provided with U-shaped steel bars, and the upper and lower ordinary steel plates and the middle low-yield steel sleeve form a low-yield steel member; The upper steel plate is placed vertically and then horizontally through the rectangular channel to be closely attached to the horizontal part of the U-shaped steel bar. The lower steel plate is installed in the same way through the rectangular channel to be closely attached to the horizontal part of the U-shaped steel bar. Two C-shaped low-yield half sleeves are installed to form a low-yield steel member.
2. The prefabricated shear wall horizontal joint according to claim 1, characterized in that, The through-length part of the longitudinal bars of the U-shaped steel bar is fixed by stirrups in the upper wall body and the lower wall body.
3. The prefabricated shear wall horizontal joint according to claim 1, characterized in that, The U-shaped steel bars are arranged alternately and closely in the edge member area of the upper wall body and the lower wall body.
4. The prefabricated shear wall horizontal joint according to claim 1, wherein The length of the extended part of the longitudinal part of the U-shaped steel bar outside the edge member area of the shear wall is determined by the length of the middle low-yield steel sleeve, and the length of the middle low-yield steel sleeve is slightly less than the length of the longitudinal part of the U-shaped steel bar.
5. The prefabricated shear wall horizontal joint according to claim 3, characterized in that, The U-shaped steel bars of the upper and lower wall bodies are arranged alternately and closely, forming a rectangular channel and a rectangular steel bar skeleton in the edge member area.
6. The prefabricated shear wall horizontal joint according to claim 1, characterized in that, The length of the middle low-yield steel sleeve is slightly less than the length of the longitudinal part of the U-shaped steel bar.
7. The prefabricated shear wall horizontal joint according to claim 1, characterized in that The length of the extended part of the longitudinal part of the U-shaped steel bar outside the edge member area of the shear wall is determined by the length of the middle low-yield steel sleeve.
8. The prefabricated shear wall horizontal joint according to claim 1, characterized in that, The low-yield steel member is fixed by tying the middle low-yield sleeve with wire.