Stirrup optimizing device of shock insulation layer stiff concrete short column

Abstract

The utility model relates to a stirrup optimizing device of a shock insulation layer stiff concrete short column. The structure comprises a section steel column and a section steel bracket, closed stirrups on the outer side of a stiff concrete short column are replaced by steel plate hoops, only internal non-closed stirrups are reserved, and the steel plate hoops are connected with a section steel column web through connecting plates. According to the principle of equal-strength replacement, the strength of the steel plate hoop is rechecked by referring to the eccentric compression component of the combined structure, and the width, thickness and spacing of the steel plate hoop are determined. The section steel and the reinforcing steel bars of the shock insulation layer stiff concrete structure can be deepened by combining the three-dimensional model, entrusted to be processed, manufactured and formed by factories and transported to the site for hoisting and mounting. According to the utility model, the construction problem of dense nodes in the beam column area of the stiff concrete structure of the buttress on the shock insulation layer is solved, the on-site welding workload can be effectively reduced, the concrete pouring and vibrating operation is convenient, the on-site construction efficiency is improved, and the forming quality of the stiff concrete structure is ensured.

Description

Technical Field

[0001] This utility model relates to the field of construction of seismic isolation layer reinforced concrete structures, and in particular to an optimized stirrup device for short columns of seismic isolation layer reinforced concrete. Background Technology

[0002] Seismic isolation technology refers to the use of deformation of seismic bearings or other energy-dissipating components to dissipate seismic energy, thereby extending the natural vibration period of a building structure and preventing damage and collapse. It is an effective way to improve the seismic performance of building structures. In recent years, the application of seismic isolation technology in new buildings has become increasingly common. When the upper and lower structural forms of the seismic isolation layer change, such as using a frame structure for the underground structure and a shear wall structure for the above-ground structure, a reinforced concrete transfer layer is usually applied to the piers above the seismic isolation layer during structural design. The design and construction of the beam-column joint area of ​​the reinforced concrete structure are crucial to ensuring structural reliability and seismic performance. Traditional construction methods often use on-site welding of stirrups, resulting in a complex network of steel sections, reinforcing bars, and stirrups at the beam-column joints. Closed stirrups are installed through perforations in the corbel web, leading to small stirrup spacing and a large number of legs, which significantly weakens the cross-section of the corbel steel. In addition, the seismic isolation layer has a small floor height, and the reinforced concrete beam-column joints have dense reinforcement, making on-site welding, concrete pouring, and vibration difficult, and the quality of the structure is hard to guarantee. Steel plate hoops refer to multiple strip steel plates welded into a ring and then welded to the beam and column steel sections. They can replace stirrups in reinforced concrete structures, reducing the amount of welding work. Currently, the field application of steel plate hoops is mainly concentrated in super high-rise composite structures. In seismic isolation reinforced concrete structures, stirrups are still mainly perforated or welded. There are no reported examples of the application of steel plate hoops in seismic isolation reinforced concrete structures. Summary of the Invention

[0003] This invention addresses the technical problem in the prior art where, when stirrups are used in the reinforced concrete short columns of the seismic isolation layer, the dense reinforcement at the beam-column joints makes on-site welding, concrete pouring, and vibration difficult, resulting in challenges in ensuring the quality of the final product. It provides an optimized stirrup device for the reinforced concrete short columns of the seismic isolation layer. This invention solves the construction problem of dense joints in the beam-column area of ​​the reinforced concrete structure of the seismic isolation layer, effectively reducing on-site welding work, facilitating concrete pouring and vibration, improving on-site construction efficiency, and ensuring the quality of the reinforced concrete structure.

[0004] The technical solution of this utility model is as follows: This utility model is a stirrup optimization device for a short reinforced concrete column with seismic isolation layer. Its special feature is that the stirrup optimization device for the short reinforced concrete column with seismic isolation layer uses steel plate hoops to replace the closed stirrups on the outside of the short reinforced concrete column, retaining only the internal unclosed stirrups. This device includes a steel column, a steel bracket, and steel plate hoops. The steel bracket is set on one side of the steel column, and the steel plate hoops are arranged around the outside of the steel column. The steel plate hoops are connected to the steel column through a connecting plate.

[0005] Furthermore, the steel column includes a web and flange plates. There are two flange plates arranged in a cross shape, and four web plates are respectively arranged on both sides of the two flange plates. The steel plate hoops are connected to the web of the steel column through connecting plates.

[0006] Furthermore, the steel bracket includes an upper flange steel plate, a lower flange steel plate, and a steel bracket web. The upper flange steel plate and the lower flange steel plate are respectively set at the upper and lower ends of the steel bracket web. One end of the upper flange steel plate and the lower flange steel plate are connected to the web of the steel column. The steel plate hoop is connected to the steel bracket web to form a closed ring.

[0007] Furthermore, a steel beam is provided on the other side of the steel bracket, and the steel beam is connected to the steel bracket by high-strength bolts.

[0008] Furthermore, steel studs are provided on the web, upper flange, and lower flange of the steel column.

[0009] Furthermore, a welded steel plate is provided at the lower part of the web of the steel column.

[0010] Furthermore, the steel plate hoop includes four strip-shaped steel plates: a front strip-shaped steel plate, a rear strip-shaped steel plate, a left strip-shaped steel plate, and a right strip-shaped steel plate. Both ends of the front strip-shaped steel plate and the two rear strip-shaped steel plates are provided with a single-sided V-shaped bevel. The ends of the left strip-shaped steel plate and the right strip-shaped steel plate are respectively connected to the front strip-shaped steel plate and the rear strip-shaped steel plate through the single-sided V-shaped bevel. A notch is provided in the middle of the left strip-shaped steel plate, and the web plate of the steel corbel is inserted into the notch. The front strip-shaped steel plate, the rear strip-shaped steel plate, and the right strip-shaped steel plate are respectively connected to the web plate of the steel column through connecting plates.

[0011] Furthermore, the steel plate hoops are multiple, evenly distributed from top to bottom, and arranged around the outside of the steel column.

[0012] Furthermore, flange plates are installed at the bottom of the steel columns.

[0013] This utility model provides an optimized stirrup device for short reinforced concrete columns in seismic isolation layers. It replaces the outer closed stirrups with steel plate hoops, retaining only the inner non-closed stirrups. Following the principle of "equal strength substitution," the strength of the steel plate hoops is verified by referring to the strength of eccentrically compressed components in composite structures to determine the width, thickness, and spacing of the steel plate hoops. The steel profiles and reinforcing bars of the reinforced concrete structure in the seismic isolation layer can be further developed using a 3D model, manufactured in a factory, and transported to the site for hoisting and installation. Therefore, the beneficial effects of this utility model are as follows:

[0014] 1) This utility model uses steel plate hoops to replace the stirrups of stiffened concrete short columns, avoiding the stirrups from passing through the steel corbel. The web of the steel corbel has no pre-reserved holes for stirrups, and the cross-section and strength of the steel are not compromised.

[0015] 2) This utility model uses steel plate hoops to replace the outer closed hoops, retaining only the inner non-closed hoops, which facilitates concrete pouring and vibration, ensures the compactness of the concrete in the short column area of ​​the stiff concrete, and improves the quality of concrete forming.

[0016] The steel column, steel bracket, and steel plate hoop of the three utility models are all prefabricated in the factory and installed on the upper flange plate of the seismic isolation bearing through anchor sleeves. The protruding steel bracket is connected to the steel beam by high-strength bolts, which can reduce on-site construction procedures and speed up the construction progress.

[0017] 4) The steel plate hoop used in this utility model is a conventional material, which can effectively utilize the cutting leftover material from the processing of steel components in the factory, reduce the scrap rate of steel, save on-site work, improve on-site construction efficiency, and has good social and economic benefits, and is easy to promote. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a plan view of the connection between the steel column and the steel plate hoop;

[0020] Figure 3 This is a schematic diagram of the steel plate hoop of this utility model;

[0021] The annotations in the attached figures are explained as follows:

[0022] 1. Steel column; 2. Steel bracket; 3. Steel plate hoop; 4. Connecting plate; 5. High-strength bolt; 6. Steel stud; 7. Flange plate; 8. Steel beam; 9. Welded steel plate;

[0023] 11. Flange steel plate; 12. Web plate of steel column;

[0024] 21. Upper flange steel plate; 22. Steel bracket web plate; 23. Lower flange steel plate;

[0025] 31. Strip steel plate; 32. Reserved notch; 33. Single-sided V-shaped bevel. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] See Figure 1The structure of this utility model includes a reinforced concrete short column, which is composed of a steel column 1, a steel bracket 2, and a steel plate hoop 3. The steel bracket 2 is located on one side of the steel column 1, and the steel plate hoop 3 is arranged around the outside of the steel column 1. The steel plate hoop 3 is connected to the steel column 1 by a connecting plate 4. Both the steel column 1 and the steel bracket 2 are composed of steel plates and welded into a whole. In this embodiment, both the steel column 1 and the steel bracket 2 are welded from web plates and flange plates. Specifically, the steel column 1 includes a web plate 12 and flange plates 11, with two flange plates 11 arranged in a cross shape. There are four web plates 12, respectively located on both sides of the two flange plates 11. The steel bracket 2 includes an upper flange plate 21, a lower flange plate 23, and a web plate 22. The upper flange plate 21 and lower flange plate 23 are respectively located at the upper and lower ends of the web plate 22, and one end of each flange plate 21 and lower flange plate 22 is connected to the web plate 12. A steel plate hoop 3 is welded to the web plate 12 via a connecting plate 4 and welded to the web plate 22 to form a closed ring. The steel beam 8 is connected to the steel bracket 2 via high-strength bolts 5, thus forming a continuous rigid concrete structural transfer layer. The bottom of the steel column 1 is provided with a flange plate 7. The stiffened concrete short column is connected to the upper flange plate of the seismic isolation bearing by means of the bottom flange plate 7 and the anchor sleeve.

[0028] See Figure 1 , Figure 2 Steel studs 6 are welded to the web 12 of the steel column 1 and the upper flange steel plate 21 and lower flange steel plate 23 of the steel corbel 2 to enhance the synergistic effect between the steel and concrete of the rigid structure and improve the stress state of the structure. A welded steel plate 9 is provided at the lower part of the web 12 of the steel column. The reinforcing steel bars of the rigid structure pass through the welded steel plate 9 and are reinforcedly connected to the short reinforced concrete column.

[0029] See Figure 3 The steel plate hoop 3 of this utility model comprises four strip-shaped steel plates: a front strip-shaped steel plate, a rear strip-shaped steel plate, a left strip-shaped steel plate, and a right strip-shaped steel plate. Both ends of the front and rear strip-shaped steel plates are provided with a single-sided V-shaped bevel. The ends of the left and right strip-shaped steel plates are welded to the front and rear strip-shaped steel plates respectively through the single-sided V-shaped bevel. A notch 32 is pre-reserved in the middle of the left strip-shaped steel plate for welding to the web plate 22 of the corbel. The front, rear, and right strip-shaped steel plates are connected to the web plate 12 of the steel column respectively through connecting plates 4. The strip-shaped steel plates form corner joints, which should preferably be welded using a single-sided V-shaped bevel. A welding bevel is provided on one side and not on the other, which can enhance the weld strength and maintain a smooth appearance.

[0030] When this utility model is used, if steel plate hoops are used instead of stirrups in the reinforced concrete short column, the strength verification calculation is performed according to the principle of "equivalent strength substitution" and the eccentric compression member in Clause 6.2.16 of the "Code for Design of Composite Structures" (JGJ138-2016) to determine the width, thickness, and spacing of the steel plate hoops 3. The reinforced concrete short column composed of the steel column 1, the steel bracket 2, and the steel plate hoops 3, the steel studs 6, the steel beam 8, and the welded steel plate 9 are cut and formed in the factory. When transported to the site for hoisting and installation, the flange plate 7 is installed on the upper flange plate of the seismic isolation bearing through the anchor sleeve.

[0031] The content of this utility model and the technical content not specifically described in the above embodiments are the same as the prior art.

[0032] The above are merely specific embodiments disclosed in this utility model, but the scope of protection disclosed in this utility model is not limited thereto. The scope of protection disclosed in this utility model shall be determined by the scope of protection of the claims.

Claims

1. A stirrup optimization device for a short reinforced concrete column with a seismic isolation layer, characterized in that: The stirrup optimization device for the rigid concrete short column of the seismic isolation layer uses steel plate hoops to replace the closed stirrups on the outside of the rigid concrete short column, retaining only the internal unclosed stirrups. The steel bracket is set on one side of the steel column, and the steel plate hoop is surrounded on the outside of the steel column. The steel plate hoop is connected to the steel column by a connecting plate.

2. The stirrup optimization device for the seismic isolation layer stiffened concrete short column according to claim 1, characterized in that: The steel column includes a web and flange plates. There are two flange plates arranged in a cross shape. There are four web plates, which are respectively arranged on both sides of the two flange plates. The steel plate hoops are connected to the web plates of the steel column through connecting plates.

3. The stirrup optimization device for the reinforced concrete short column with seismic isolation layer according to claim 2, characterized in that: The steel bracket includes an upper flange steel plate, a lower flange steel plate, and a steel bracket web. The upper flange steel plate and the lower flange steel plate are respectively disposed at the upper and lower ends of the steel bracket web. One end of the upper flange steel plate and the lower flange steel plate are connected to the web of the steel column. The steel plate hoop is connected to the steel bracket web to form a closed ring.

4. The stirrup optimization device for the reinforced concrete short column with seismic isolation layer according to claim 3, characterized in that: A steel beam is provided on the other side of the steel bracket, and the steel beam is connected to the steel bracket by high-strength bolts.

5. The stirrup optimization device for the reinforced concrete short column with seismic isolation layer according to claim 4, characterized in that: The web, upper flange, and lower flange of the steel column are all equipped with steel studs.

6. The stirrup optimization device for the reinforced concrete short column with seismic isolation layer according to claim 5, characterized in that: The lower part of the web of the steel column is provided with a welded steel plate.

7. The stirrup optimization device for the seismic isolation layer stiffened concrete short column according to any one of claims 3 to 6, characterized in that: The steel plate hoop includes four strip-shaped steel plates: a front strip-shaped steel plate, a rear strip-shaped steel plate, a left strip-shaped steel plate, and a right strip-shaped steel plate. Both ends of the front strip-shaped steel plate and the two rear strip-shaped steel plates are provided with a single-sided V-shaped bevel. The ends of the left strip-shaped steel plate and the right strip-shaped steel plate are respectively connected to the front strip-shaped steel plate and the rear strip-shaped steel plate through the single-sided V-shaped bevel. A notch is provided in the middle of the left strip-shaped steel plate, and the web plate of the steel corbel is inserted into the notch. The front strip-shaped steel plate, the rear strip-shaped steel plate, and the right strip-shaped steel plate are respectively connected to the web plate of the steel column through connecting plates.

8. The stirrup optimization device for the reinforced concrete short column with seismic isolation layer according to claim 7, characterized in that: The steel plate hoops are multiple, evenly distributed at upper and lower intervals, and arranged around the outside of the steel column.

9. The stirrup optimization device for the seismic isolation layer stiffened concrete short column according to claim 8, characterized in that: The bottom of the steel column is equipped with a flange plate.

Images