Fabricated composite wall and frame column damping energy dissipation connecting joint
By introducing a damping energy-absorbing connection node between the prefabricated composite wall and the frame column and utilizing the elastic and energy-absorbing characteristics of the damping spring, the problem of composite wall panel damage under earthquake action is solved, achieving a flexible connection effect that is simple to construct, economical and reliable.
Patent Information
- Application Number
- CN202423006827.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-06
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-06
AI Technical Summary
The current connection nodes between prefabricated composite walls and frame structures are prone to wall damage under earthquakes, and lack effective flexible connection methods, which cannot meet the requirements of the specifications.
A combination design of column embedded parts, bolt connecting rods, damping springs and wall embedded parts is adopted. Through the damping energy dissipation connection method, the damping spring is used to provide the allowable elastic deformation value in the small earthquake stage and to dissipate energy in the medium earthquake stage to achieve a flexible connection.
It effectively reduces the damage of composite wall panels under earthquake action, improves construction efficiency and economy, and meets the structural seismic requirements of "no damage in small earthquakes and repairable in medium earthquakes".
Smart Images
Figure CN223482006U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction technology, specifically to a damping energy dissipation connection node between a prefabricated composite wall and a frame column. Background Technology
[0002] Prefabricated buildings, characterized by their environmental friendliness, high efficiency, and energy conservation, have become one of the main development trends in the transformation and upgrading of my country's construction industry. In the process of transitioning from cast-in-place structures to fully prefabricated structures, composite wall panels, a type of semi-prefabricated shear wall, have been extensively studied and put into use as a structural component during this transitional period. Compared to cast-in-place concrete structures, composite wall panels reduce the amount of formwork and on-site pouring, and compared to fully prefabricated structures, the sleeve grouting connection construction process is simpler. Composite walls combine the advantages of the good integrity of cast-in-place concrete structures and the industrialized production capabilities of precast concrete structures.
[0003] Currently, the requirements for prefabricated walls mainly refer to the "Technical Requirements for Wall Panels for Prefabricated Buildings" JGT578-2021. This standard requires that the wall panel system should have the ability to adapt to inter-story deformation of the structure. Under wind loads with a 50-year return period or frequent earthquakes, the wall panels must not suffer damage such as plastic deformation, surface cracking, or component detachment due to elastic inter-story displacement of the main structure. Under design earthquake conditions, the exterior wall panels must not fall off. The wall panel system and the main structure should preferably be flexibly connected, and the connection nodes should meet the load-bearing capacity requirements and the deformation performance requirements of the wall panels.
[0004] However, the current vertical joints of composite walls are in tight contact with surrounding structural members, providing significant additional lateral stiffness to the main structure. This can increase the seismic load on the structure, alter the stress characteristics of structural members, and lead to severe seismic damage, such as damage to the walls themselves. A small number of prefabricated enclosure walls use EPS boards of a certain thickness as padding between the wall edge and the frame column, then connect the column and wall panel with expansion bolts; however, the flexible connection effect is unsatisfactory. Therefore, there is currently a lack of flexible connection points between prefabricated walls and frame structures that meet code requirements and have good functionality. By isolating the force transmission path between the wall and structural members, and based on the principle of energy dissipation and vibration reduction technology, a vertical damping energy-dissipating connection method for prefabricated composite wall panels and frame columns is proposed.
[0005] To address the aforementioned issues, this utility model provides a damping energy dissipation connection node between a prefabricated composite wall and a frame column. Utility Model Content
[0006] The purpose of this utility model is to provide a damping energy dissipation connection node between a prefabricated composite wall and a frame column, which solves the problem of severe damage to composite wall panels caused by earthquakes. It has the advantages of simple construction process, reasonable structural design and low cost, thus solving the problems in the background technology.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a prefabricated composite wall and frame column damping energy dissipation connection node, comprising a column embedded part, a bolt connecting rod, a damping spring, and a wall embedded part. The column embedded part consists of a column end nut, a T-shaped steel bar, a steel plate, and a sleeve. The damping spring consists of a limiting bolt, a limiting nut, a spring, and a damping spring connecting nut. The wall embedded part consists of a baffle, a wall embedded U-shaped steel bar, and a fixing bolt. The column embedded part and the damping spring are detachable at both ends of the bolt connecting rod, and the damping spring is detachable within the wall embedded part.
[0008] Furthermore, the column end nut has a diameter of 8-10mm and is sized to match the bolt connecting rod. The column end nut is welded to the steel plate. The T-shaped reinforcing bar has the same diameter as the internal stirrups of the column and is welded together to form a T-shape. It is then welded as a whole to the steel plate. The steel plate has dimensions of 100mm×100mm×5-8mm, and a hole with a diameter of 8-10mm is opened at the centroid to match the diameter of the column end nut. The sleeve has a diameter 1-2mm larger than the diameter of the column end nut and is welded to the column end nut.
[0009] Furthermore, both ends of the bolt connecting rod are threaded and the middle is a steel rod. One end of the bolt connecting rod is threaded to the column end nut, and the other end is threaded to the damping spring connecting nut. The diameter of the bolt connecting rod is compatible with the column end nut and the damping spring connecting nut.
[0010] Furthermore, the diameter of the limit bolt is compatible with that of the limit nut. The limit bolt is threaded to the limit nut through the elongated hole of the U-shaped steel pre-embedded in the wall. The limit nut and the damping spring connecting nut are respectively welded to both sides of the spring.
[0011] Furthermore, the protrusions formed on both sides of the baffle are adapted to the grooves symmetrically opened on the inner side wall of the wall-embedded U-shaped steel. A 10mm hole is opened at the centroid of the short plate of the wall-embedded U-shaped steel. A long strip hole with a length of 30mm and a height of 10mm is opened on the long plate on the side where the wall-embedded U-shaped steel is connected to the limiting bolt. A long strip hole with a length of 30mm and a height greater than the outer diameter of the damping spring connecting nut is opened on the long plate on the side where the wall-embedded U-shaped steel is connected to the bolt connecting rod. The long strip hole must be opened outside the post-cast layer of the composite wall panel. The diameter of the fixing bolt is 10mm, and the wall-embedded parts are fixed in the precast layer through the hole opened at the centroid of the short plate of the wall-embedded U-shaped steel.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0013] 1. This utility model solves the problem of earthquake damage to composite wall panels caused by seismic forces.
[0014] 2. This utility model has a reasonable structure, which improves the allowable value of construction error and speeds up construction.
[0015] 3. This utility model has a high degree of industrialization, is easy to obtain materials, and is economical and reliable.
[0016] 4. This utility model mainly relies on damping springs to dissipate seismic energy. During minor earthquakes, the inherent elasticity of the damping springs provides an allowable deformation range for the structure, allowing the composite wall and the main frame to work together. During moderate earthquakes, the damping springs yield and dissipate energy. Because the damping springs are connected by bolts, they are easy to replace. This meets the seismic resistance requirements of "no damage in minor earthquakes and repairable in moderate earthquakes". Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the column embedded part of this utility model;
[0019] Figure 3 This is a schematic diagram of the bolt connecting rod of this utility model;
[0020] Figure 4 This is a schematic diagram of the damping spring of this utility model;
[0021] Figure 5 This is a schematic diagram of the wall embedded part of this utility model.
[0022] In the diagram: 1. Column embedded part; 101. Column end nut; 102. T-shaped steel bar; 103. Steel plate; 104. Sleeve; 2. Bolt connecting rod; 3. Damping spring; 301. Limit bolt; 302. Limit nut; 303. Spring; 304. Damping spring connecting nut; 4. Wall embedded part; 401. Baffle; 402. Wall embedded U-shaped steel; 403. Fixing bolt. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] To address the technical challenges of effectively reducing earthquake damage, such as... Figure 1-5 As shown, the following preferred technical solutions are provided:
[0025] A prefabricated composite wall and frame column damping energy dissipation connection node includes a column embedded part 1, a bolt connecting rod 2, a damping spring 3, and a wall embedded part 4. The column embedded part 1 is composed of a column end nut 101, a T-shaped steel bar 102, a steel plate 103, and a sleeve 104. The damping spring 3 is composed of a limiting bolt 301, a limiting nut 302, a spring 303, and a damping spring connecting nut 304. The wall embedded part 4 is composed of a baffle 401, a wall embedded U-shaped steel bar 402, and a fixing bolt 403. The column embedded part 1 and the damping spring 3 are detachable at both ends of the bolt connecting rod 2, and the damping spring 3 is detachable within the wall embedded part 4.
[0026] Specifically, in the vertical damping energy dissipation connection, the first step, during the column formwork process, involves positioning the column embedded part 1 on the column formwork and making a hole in the column formwork corresponding to the centroidal hole of the steel plate 103. A bolt of the same diameter as the column end nut 101 is passed through the hole in the column formwork and temporarily connected to the column end nut 101, thus completing the positioning of the column embedded part 1. Finally, the column concrete is poured and the formwork is removed for curing. The second step, after the precast composite wall layer is installed, involves determining the position of the wall embedded part 4 on the precast composite wall layer corresponding to the position of the column embedded part 1. The wall embedded part 4 is then fixed to the precast composite wall layer by fixing bolts 403 through the hole made in the centroid of the wall embedded U-shaped steel 402 short plate, thus completing the positioning of the wall embedded part 4. Finally, the post-concrete layer of the composite wall is poured and cured; in the third step, one end of the bolt connecting rod 2 is connected to the column embedded part 1, and the other end is connected to the damping spring 3; in the fourth step, the damping spring 3 is fixed to the wall embedded part 4 through the connection of the limiting bolt 301 and the limiting nut 302, and finally the baffle 401 is placed in the groove of the wall embedded U-shaped steel 402 to complete the vertical damping energy dissipation connection. The purpose of this design is to solve the problem of earthquake damage to composite wall panels caused by seismic action, and it has the advantages of simple construction process, reasonable structural design and low cost.
[0027] Further, such as Figure 1 and Figure 2 As shown, the following preferred technical solutions are provided:
[0028] The column end nut 101 has a diameter of 8-10mm and is sized to match the bolt connecting rod 2. The column end nut 101 is welded to the steel plate 103. The T-shaped steel bar 102 has the same diameter as the inner stirrup of the column and is welded to form a T-shape. It is then welded as a whole to the steel plate 103. The steel plate 103 has dimensions of 100mm×100mm×5-8mm and has a hole with a diameter of 8-10mm at its centroid that matches the diameter of the column end nut 101. The sleeve 104 has a diameter 1-2mm larger than the diameter of the column end nut 101 and is welded to the column end nut 101. The purpose of this design is to facilitate the disassembly and assembly of the sleeve and the bolt connecting rod 2.
[0029] Further, such as Figure 1-4 As shown, the following preferred technical solutions are provided:
[0030] Both ends of the bolt connecting rod 2 are threaded and the middle is a steel rod. One end of the bolt connecting rod 2 is threaded to the column end nut 101, and the other end is threaded to the damping spring connecting nut 304. The diameter of the bolt connecting rod 2 is compatible with the column end nut 101 and the damping spring connecting nut 304. The purpose of this design is that the two ends of the bolt connecting rod 2 are detachable from the column end nut 101 and the damping spring connecting nut 304.
[0031] Further, such as Figure 1 , Figure 4 and Figure 5 As shown, the following preferred technical solutions are provided:
[0032] The diameter of the limiting bolt 301 is compatible with that of the limiting nut 302. The limiting bolt 301 is threaded to the limiting nut 302 through the elongated hole of the U-shaped steel 402 pre-embedded in the wall. The limiting nut 302 and the damping spring connecting nut 304 are respectively welded to both sides of the spring 303. The purpose of this design is to limit the damping spring 3.
[0033] Further, such as Figure 1-5 As shown, the following preferred technical solutions are provided:
[0034] The protrusions formed on both sides of the baffle 401 are adapted to the grooves symmetrically opened on the inner side wall of the wall-embedded U-shaped steel 402. A 10mm hole is opened at the centroid of the short plate of the wall-embedded U-shaped steel 402. A long strip hole with a length of 30mm and a height of 10mm is opened on the long plate of the wall-embedded U-shaped steel 402 connected to the limiting bolt 301. A long strip hole with a length of 30mm and a height greater than the outer diameter of the damping spring connecting nut 304 is opened on the long plate of the wall-embedded U-shaped steel 402 connected to the bolt connecting rod 2. The long strip hole must be opened outside the post-cast layer of the composite wall panel. The diameter of the fixing bolt 403 is 10mm. The wall-embedded part 4 is fixed in the precast layer through the hole opened at the centroid of the short plate of the wall-embedded U-shaped steel 402. The purpose of this design is to ensure that the damping spring 3 can be stretched normally, and to avoid the post-cast concrete from entering the long strip hole.
[0035] In summary: During the vertical damping energy dissipation connection, the first step, during the column formwork process, involves positioning the column embedded part 1 on the column formwork and creating a hole in the column formwork corresponding to the centroidal hole of the steel plate 103. A bolt of the same diameter as the column end nut 101 is passed through the hole in the column formwork and temporarily connected to the column end nut 101, thus completing the positioning of the column embedded part 1. Finally, the column concrete is poured and the formwork is removed for curing. The second step, after the precast composite wall layer is installed, involves determining the position of the wall embedded part 4 on the precast composite wall layer corresponding to the position of the column embedded part 1. The wall embedded part 4 is then fixed to the precast composite wall layer by fixing bolts 403 through the hole created in the centroid of the wall embedded U-shaped steel 402 short plate, thus completing the positioning of the wall embedded part 4. Finally, the post-concrete layer of the composite wall is poured and cured; in the third step, one end of the bolt connecting rod 2 is connected to the column embedded part 1, and the other end is connected to the damping spring 3; in the fourth step, the damping spring 3 is fixed to the wall embedded part 4 through the connection of the limiting bolt 301 and the limiting nut 302, and finally the baffle 401 is placed in the groove of the wall embedded U-shaped steel 402 to complete the vertical damping energy dissipation connection. The purpose of this design is to solve the problem of earthquake damage to composite wall panels caused by seismic action, and it has the advantages of simple construction process, reasonable structural design and low cost.
[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A damping energy dissipation connection node between a prefabricated composite wall and a frame column, characterized in that: The system comprises a column pre-embedded part (1), a bolt connecting rod (2), a damping spring (3), and a wall pre-embedded part (4). The column pre-embedded part (1) consists of a column end nut (101), a T-shaped steel bar (102), a steel plate (103), and a sleeve (104). The damping spring (3) consists of a limiting bolt (301), a limiting nut (302), a spring (303), and a damping spring connecting nut (304). The wall pre-embedded part (4) consists of a baffle (401), a wall pre-embedded U-shaped steel bar (402), and a fixing bolt (403). The column pre-embedded part (1) and the damping spring (3) are detachable at both ends of the bolt connecting rod (2), and the damping spring (3) is detachable inside the wall pre-embedded part (4).
2. The prefabricated composite wall and frame column damping energy dissipation connection node according to claim 1, characterized in that: The column end nut (101) has a diameter of 8-10mm and is sized to match the bolt connecting rod (2). The column end nut (101) is welded to the steel plate (103). The T-shaped steel bar (102) has the same diameter as the inner stirrup of the column and is welded to form a T-shape. It is then welded to the steel plate (103) as a whole. The steel plate (103) has a size of 100mm×100mm×5-8mm and has a hole with a diameter of 8-10mm at its centroid that is sized to match the diameter of the column end nut (101). The sleeve (104) has a diameter 1-2mm larger than the diameter of the column end nut (101) and is welded to the column end nut (101).
3. The prefabricated composite wall and frame column damping energy dissipation connection node according to claim 1, characterized in that: The bolt connecting rod (2) has threads at both ends and a steel rod in the middle. One end of the bolt connecting rod (2) is threaded to the column end nut (101), and the other end is threaded to the damping spring connecting nut (304). The diameter of the bolt connecting rod (2) is compatible with the column end nut (101) and the damping spring connecting nut (304).
4. The prefabricated composite wall and frame column damping energy dissipation connection node according to claim 1, characterized in that: The diameter of the limiting bolt (301) is compatible with that of the limiting nut (302). The limiting bolt (301) is threaded to the limiting nut (302) through the elongated hole of the wall-embedded U-shaped steel (402). The limiting nut (302) and the damping spring connecting nut (304) are respectively welded to both sides of the spring (303).
5. The prefabricated composite wall and frame column damping energy dissipation connection node according to claim 1, characterized in that: The protrusions formed on both sides of the baffle (401) are adapted to the grooves symmetrically opened on the inner side wall of the wall-embedded U-shaped steel (402). A 10mm hole is opened at the centroid of the short plate of the wall-embedded U-shaped steel (402). A long strip hole with a length of 30mm and a height of 10mm is opened on the long plate of the wall-embedded U-shaped steel (402) connected to the limiting bolt (301). A long strip hole with a length of 30mm and a height greater than the outer diameter of the damping spring connecting nut (304) is opened on the long plate of the wall-embedded U-shaped steel (402) connected to the bolt connecting rod (2). The long strip hole must be opened outside the post-cast layer of the composite wall panel. The diameter of the fixing bolt (403) is 10mm, and the wall-embedded part (4) is fixed in the precast layer through the hole opened at the centroid of the short plate of the wall-embedded U-shaped steel (402).