A function to restore the node configuration of the assembled RCS frame

Abstract

The present invention provides a functionally recoverable prefabricated RCS frame node configuration. A steel beam is fixed to the sidewalls of prefabricated RC columns. The steel beam comprises a cantilever beam section and an intermediate beam section. Two-way hinges are attached to the upper flanges of the cantilever beam section and the upper flanges of the intermediate beam section, respectively. Web shear plates are attached to the webs of the cantilever beam section and the webs of the intermediate beam section, respectively. T-shaped energy dissipators are attached to the lower flanges of the cantilever beam section and the intermediate beam section, respectively, and connected by a third high-strength bolt. The intermediate beam section is provided with steel beam stiffeners, and prestressed steel rods are tensioned and anchored between the steel beam stiffeners and the prefabricated RC columns. The present invention has a simple structure and clear force transmission. During an earthquake, the T-shaped energy dissipator yields and dissipates energy, while the intermediate beam section rotates and deforms about the two-way hinge. After the earthquake, the prestressed steel rods retract to eliminate residual rotation and deformation. Furthermore, the T-shaped energy dissipator, with its exposed lower flange, can be easily replaced if damaged, achieving a structure that combines excellent energy dissipation capacity with functional recoverability.

Description

Technical Field

[0001] The present invention relates to the technical field of assembled RCS frame structures, in particular to an assembled RCS frame node configuration with excellent seismic resistance and recoverable post-earthquake functions. Background Art

[0002] The reinforced concrete column and steel beam (RCS) frame is a new composite structural system, increasingly used in engineering because it leverages the respective advantages of both steel and reinforced concrete components. On the one hand, the use of reinforced concrete columns leverages the excellent compressive properties of concrete to improve structural stability, while also offering advantages such as high rigidity and excellent fire resistance. On the other hand, the use of section steel beams leverages the excellent tensile properties of steel to reduce cross-sectional dimensions, thereby increasing the cost-effectiveness of the structure. Furthermore, the high strength and light weight of steel facilitate the transportation and hoisting of prefabricated frame components.

[0003] The seismic performance of RCS frame nodes plays a critical role in the performance of a structure. While traditional RCS frame nodes offer good seismic performance due to the advantages of the RCS framework, earthquake damage often proves difficult to repair, and large residual deformations make it difficult to restore the structure's functionality. With the advancement of seismic design concepts, the primary objectives of seismic design have evolved from ensuring the seismic safety of building structures to controlling earthquake losses and ensuring functional recoverability. This places new demands on the configuration of traditional RCS frame nodes. Summary of the Invention

[0004] In order to solve the problems of difficulty in repairing post-earthquake damage and restoring residual deformation in the above-mentioned existing prefabricated RCS frame nodes, the present invention provides a functionally restorable prefabricated RCS frame node configuration.

[0005] To achieve the above object, the technical implementation scheme of the present invention is:

[0006] One function can restore the node configuration of prefabricated RCS frames, including prefabricated RC columns, steel beams, node connectors, and prestressed steel rods;

[0007] The steel beam is fixed on the side wall of the prefabricated RC column; the steel beam includes a cantilever beam section and an intermediate beam section; the connection between the prefabricated RC column and the cantilever beam section adopts various node forms in existing standards (including beam-through type or column-through type).

[0008] The cantilever beam section and the middle beam section both include a steel beam web; the upper surface of the steel beam web is provided with a steel beam upper flange, and the lower surface is provided with a steel beam lower flange;

[0009] The node connector includes a two-way hinge, a web shear plate, and a T-shaped energy dissipation member; the two sides of the two-way hinge are respectively mounted on the upper flange of the steel beam of the cantilever beam section and the upper flange of the steel beam of the middle beam section; the two sides of the web shear plate are respectively mounted on the steel beam web of the cantilever beam section and the steel beam web of the middle beam section; the two sides of the T-shaped energy dissipation member are respectively mounted on the lower flange of the steel beam of the cantilever beam section and the middle beam section, and are connected by a third high-strength bolt;

[0010] The middle beam section is provided with a steel beam stiffening rib, and the prestressed steel rod is tensioned and anchored between the steel beam stiffening rib and the prefabricated RC column.

[0011] The two sides of the bidirectional hinge are connected to the upper flanges of the cantilever beam section and the upper flanges of the middle beam section via first high-strength bolts. The two sides of the bidirectional hinge are hinged via a pin. After the T-shaped energy dissipation member yields, the middle beam section can freely rotate about the pin of the bidirectional hinge.

[0012] The web shear plate has a standard circular hole on the side connected to the cantilever beam section and an oblong hole on the side connected to the middle beam section. Both are connected by a second high-strength bolt. The oblong hole facilitates the free rotation of the middle beam section around the bidirectional hinge pin.

[0013] The pin shaft of the two-way hinge is made of 40Cr steel.

[0014] The T-shaped energy dissipation parts are made of Q235 steel with excellent energy dissipation capacity.

[0015] The steel beams, two-way hinges and web shear plates are all made of Q345 steel or higher strength steel.

[0016] The high-strength bolts on the oblong hole side of the web shear plate are of the pressure-bearing type, and the high-strength bolts used in the other node connectors are of the friction type.

[0017] The present invention can achieve the following beneficial effects:

[0018] The present invention adopts a functionally restorable assembled RCS frame node configuration, which can restore the original function of the structure after an earthquake. The cantilever beam section moves the plastic hinge outward, which can achieve the purpose of simplifying the beam-column node connection structure and avoiding earthquake damage to the core area of ​​the beam-column node; the positive and negative yield bending moments at the ends of the steel beams depend on the yield strength of the T-shaped energy-absorbing parts of the lower flange, so that the yield bending moments of the steel beams can be controlled, which is convenient for realizing the seismic design principle of "strong columns and weak beams"; the prestressed steel rods can effectively control the residual displacement angle of the node and meet the self-resetting performance of the node; the T-shaped energy-absorbing parts exposed on the lower flange are easy to replace after earthquake damage, and the function of the structure can be easily restored. At the same time, because after the node yields, the middle section of the steel beam rotates around the pin of the two-way hinge, so that in the RCS frame structure, the deformation of the upper flange floor is approximately half of that of the traditional node with the neutral axis at the middle height of the beam, so the damage to the floor is also smaller, which is more conducive to the recovery of the structural function after an earthquake. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The patented function of the present invention can restore the assembled RCS frame node configuration.

[0020] Figure 2 This is a partial assembly diagram of the patented function of the present invention that can restore the node configuration of the assembled RCS frame.

[0021] In the figure: 1. Precast RC column; 2. Cantilever beam section; 3. Intermediate beam section; 4. Upper flange of steel beam; 5. Web of steel beam; 6. Lower flange of steel beam; 7. Two-way hinge; 8. Web shear plate; 9. T-shaped energy dissipator; 10. First high-strength bolt; 11. Second high-strength bolt; 12. Third high-strength bolt; 13. Prestressed steel rod; 14. Steel beam stiffener; 15. Pin. DETAILED DESCRIPTION

[0022] The following embodiments of the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The following examples and drawings are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0023] The examples are as follows;

[0024] like Figure 1 、 Figure 2 As shown, a function can restore the node configuration of the prefabricated RCS frame, including prefabricated RC columns 1, steel beams, node connectors and prestressed steel bars;

[0025] The steel beam is fixed on the side wall of the prefabricated RC column 1; the steel beam includes a cantilever beam section 2 and an intermediate beam section 3; the connection between the prefabricated RC column 1 and the cantilever beam section adopts various node forms in existing standards, including beam-through type or column-through type.

[0026] The cantilever beam section 2 and the middle beam section 3 both include a steel beam web 5; the upper surface of the steel beam web 5 is provided with a steel beam upper flange 4, and the lower surface is provided with a steel beam lower flange 6;

[0027] The node connector includes a bidirectional hinge 7, a web shear plate 8, and a T-shaped energy dissipation member 9; the bidirectional hinge 7 is mounted on the upper flange 4 of the steel beam of the cantilever beam section 2 and the upper flange 4 of the steel beam of the middle beam section 3; the web shear plate 8 is mounted on the steel beam web 5 of the cantilever beam section 2 and the steel beam web 5 of the middle beam section 3; the T-shaped energy dissipation member 9 is mounted on the lower flange 6 of the steel beam of the cantilever beam section 2 and the middle beam section 3, and connected by a third high-strength bolt 11;

[0028] The middle beam section 3 is provided with a steel beam stiffening rib 14 , and the prestressed steel rod 13 is tensioned and anchored between the steel beam stiffening rib 14 and the prefabricated RC column 1 .

[0029] The two sides of the bidirectional hinge 7 are connected to the upper steel beam flanges 4 of the cantilever beam section 2 and the upper steel beam flanges 4 of the intermediate beam section 3 via first high-strength bolts 10. The two sides of the bidirectional hinge 7 are hinged via a pin 15. After the T-shaped energy dissipation member 9 yields, the intermediate beam section 3 can freely rotate about the pin 15 of the bidirectional hinge 7.

[0030] The web shear plate 8 has a standard circular hole on the side connected to the cantilever beam section 2 and an oblong hole on the side connected to the middle beam section 3, both of which are connected by second high-strength bolts 12. The oblong hole facilitates the free rotation of the middle beam section around the bidirectional hinge pin.

[0031] The pin 15 of the two-way hinge 7 is made of 40Cr steel.

[0032] The T-shaped energy dissipation member 9 is made of Q235 steel having excellent energy dissipation capacity.

[0033] The steel beam, the two-way hinge 7 and the web shear plate 8 are all made of Q345 steel or higher strength steel.

[0034] The high-strength bolts on the oblong hole side of the web shear plate 8 are pressure-bearing type, and the high-strength bolts used in the other node connectors are all friction type.

Claims

1. A functionally recoverable assembled RCS frame node configuration, characterized by: It includes prefabricated RC columns (1), steel beams, node connectors and prestressed steel bars; The steel beam is fixed on the side wall of the prefabricated RC column (1); the steel beam includes a cantilever beam section (2) and an intermediate beam section (3); the cantilever beam section (2) and the intermediate beam section (3) both include a steel beam web (5); the upper surface of the steel beam web (5) is provided with a steel beam upper flange (4), and the lower surface is provided with a steel beam lower flange (6); The node connection member comprises a bidirectional hinge (7), a web shear plate (8) and a T-shaped energy dissipation member (9); both sides of the bidirectional hinge (7) are respectively mounted on the upper flange (4) of the steel beam of the cantilever beam section (2) and the upper flange (4) of the steel beam of the middle beam section (3); both sides of the web shear plate (8) are respectively mounted on the steel beam web (5) of the cantilever beam section (2) and the steel beam web (5) of the middle beam section (3) for connection; both sides of the T-shaped energy dissipation member (9) are respectively mounted on the lower flange (6) of the steel beam of the cantilever beam section (2) and the middle beam section (3) for connection, and are connected by a third high-strength bolt (11); The two sides of the bidirectional hinge (7) are hinged via a pin (15); the two sides of the bidirectional hinge (7) away from the pin (15) are connected to the upper flange (4) of the steel beam of the cantilever beam section (2) and the upper flange (4) of the steel beam of the middle beam section (3) via first high-strength bolts (10); The middle beam section (3) is provided with a steel beam stiffening rib (14), and the prestressed steel rod (13) is tensioned and anchored between the steel beam stiffening rib (14) and the prefabricated RC column (1).

2. The functionally recoverable assembled RCS framework node configuration according to claim 1, characterized in that: The side of the web shear plate (8) connected to the cantilever beam section (2) is provided with a standard circular hole, and the side connected to the middle beam section (3) is provided with an oblong hole; both are connected by second high-strength bolts (12).

Images