Friction energy dissipation type pre-pressed disc spring self-resetting reinforced concrete coupling beam

Abstract

The application discloses a friction energy dissipation type pre-pressing disc spring self-resetting reinforced concrete coupling beam, which comprises two reinforced concrete short beams and a reset energy dissipation unit partially embedded in the two reinforced concrete short beams, wherein the reset energy dissipation unit comprises open round hole combined steel and slotted hole combined steel partially embedded in the two reinforced concrete short beams, two friction plates clamped by the two combined steels, high-strength bolts connecting the open round hole combined steel and the friction plates and the slotted hole combined steel, two force transmission steel plates arranged on top surfaces and bottom surfaces of the two combined steels, and a disc spring group fixed on the force transmission steel plate above the top surface of the two combined steels through a lock force round pipe and a lock force nut. The application not only has good reset capability and stable energy dissipation capability, but also can simplify the structure of the existing self-resetting reinforced concrete coupling beam and reduce the cost.

Description

Technical Field

[0001] This invention relates to a friction-dissipating self-resetting reinforced concrete coupling beam technology, belonging to the field of earthquake resistance in civil engineering. Background Technology

[0002] Reinforced concrete coupling beams in traditional frame-shear wall, shear wall, frame-tube, bundled tube, or tube-in-tube structures suffer irreparable damage, failure, or residual deformation under strong earthquakes, reducing the structure's overall integrity and hysteretic energy dissipation capacity. To improve the post-earthquake recoverability of reinforced concrete coupling beams, some researchers have developed self-centering energy dissipation coupling beams. However, existing self-centering energy dissipation coupling beams are often complex in construction, expensive, and suffer from unstable energy dissipation capacity or unsatisfactory centering effects.

[0003] Currently, the energy-dissipating components of self-centering coupling beams mainly include low-yield-strength metals, friction devices, and viscous damping energy-dissipating devices. Among these, low-yield-strength metals and viscous damping energy-dissipating devices have drawbacks such as the need for frequent replacements after earthquakes and the susceptibility of viscous materials to leakage. The current restoring components of self-centering coupling beams mainly include disc springs, steel strands, fiber-reinforced polymer (FRP) bars, and shape memory alloys. Among these, steel strands and FRP bars suffer from drawbacks such as easy loss of prestress, high anchoring difficulty, or complex manufacturing processes, while shape memory alloys are prohibitively expensive. Summary of the Invention

[0004] Purpose of the invention: The present invention provides a friction-dissipating self-resetting reinforced concrete connecting beam with good reset capability, stable energy dissipation capability, simple structure and low cost.

[0005] The technical solution adopted in this invention is: a friction-dissipating preloaded disc spring self-resetting reinforced concrete connecting beam, comprising two reinforced concrete short beams and a reset energy dissipation unit;

[0006] The reinforced concrete short beam is directly cast in place with the reinforced concrete shear wall connected to it, wherein the longitudinal reinforcement of the reinforced concrete short beam (1) is inserted into the interior of the reinforced concrete shear wall.

[0007] The reset energy dissipation unit is installed between two reinforced concrete short beams. The reset energy dissipation unit includes a round hole composite steel and a slotted hole composite steel. The round hole composite steel is composed of I-beam sections and box-shaped steel, and the slotted hole composite steel is composed of I-beam sections and two outwardly extending steel plates.

[0008] The box-shaped steel of the open-hole combined steel is inserted between the two extended steel plates of the slotted-hole combined steel; the top and bottom surfaces of the open-hole combined steel are provided with round holes; the top and bottom surfaces of the open-hole combined steel are respectively provided with force-transmitting steel plates, and the force-transmitting steel plate on the top surface of the open-hole combined steel is provided with a disc spring assembly, and the center of the disc spring assembly is provided with a locking round tube.

[0009] The locking tube is sequentially inserted into the center of the disc spring assembly, the round hole of the top force transmission steel plate of the open round hole combined steel, the round hole of the open round hole combined steel, and the round hole of the bottom force transmission steel plate of the open round hole combined steel.

[0010] The disc spring assembly is fixed on top by a locking nut with threads on its inner surface, and the force transmission steel plate under the bottom of the round hole combined steel is fixed on the bottom by a locking nut with threads on its inner surface.

[0011] A friction plate is provided between the outer side of the web of the box-shaped steel of the open-hole composite steel and the extended steel plate of the slotted-hole composite steel; the extended steel plate of the slotted-hole composite steel has vertical slots, and both the web of the box-shaped steel of the open-hole composite steel and the friction plate have round holes. High-strength bolts are inserted into the round holes and the slots, and the seismic energy is dissipated by the relative sliding of the open-hole composite steel and the slotted-hole composite steel with the friction plate attached.

[0012] After the reset energy dissipation unit is assembled, the I-beam sections of the combined steel with open round holes and the combined steel with open slots are placed into the reinforcing cage of the reinforced concrete short beam, and the concrete of the reinforced concrete short beam is poured.

[0013] Furthermore, the present invention adjusts the magnitude of the friction between the open-hole composite steel and the slotted-hole composite steel by adjusting the preload of the high-strength bolt.

[0014] Furthermore, the present invention adjusts the preload of the disc spring assembly by adjusting the distance between the locking nut on the disc spring assembly and the locking nut under the force transmission steel plate under the bottom surface of the open-hole combined steel.

[0015] Furthermore, the present invention adjusts the stiffness of the self-resetting reinforced concrete connecting beam after energy dissipation startup by adjusting the size and number of disc springs in the disc spring assembly.

[0016] Beneficial Effects: Compared with existing self-resetting reinforced concrete coupling beams, this invention has the advantages of simple structure, low cost, convenient installation and construction, and stable reset and energy dissipation capabilities. This friction-dissipated self-resetting reinforced concrete coupling beam uses a disc spring assembly to provide the reset force. The preload of the disc spring assembly can be precisely set by compressing it to the designed preload and tightening the two locking nuts. The stiffness of the coupling beam after energy dissipation is adjusted by regulating the size and number of disc springs. Using a preloaded disc spring assembly as the reset element is more stable and easier to construct than using steel strands and FRP reinforcement, and is less expensive than using shape memory alloys. Friction dissipates seismic energy; high-strength bolts can drive the friction plate and the perforated steel assembly to slide relative to each other along the slots of the perforated steel assembly. The reset energy dissipation unit of this self-resetting coupling beam is directly integrated with its reinforced concrete short beam, which in turn is directly integrated with the reinforced concrete shear wall, resulting in high construction efficiency and a simple construction process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the reinforced concrete short beam of the present invention;

[0018] Figure 2 This is a schematic diagram of the slotted composite steel of the present invention;

[0019] Figure 3 This is a schematic diagram of the composite steel with open circular holes according to the present invention;

[0020] Figure 4 This is a schematic diagram of the friction plate of the present invention;

[0021] Figure 5 This is a schematic diagram of the force-transmitting steel plate of the present invention;

[0022] Figure 6 This is a schematic diagram of the high-strength bolt of the present invention;

[0023] Figure 7 This is a schematic diagram of the locking tube of the present invention;

[0024] Figure 8 This is a schematic diagram of the locking nut of the present invention;

[0025] Figure 9 This is a schematic diagram of the disc spring assembly of the present invention;

[0026] Figure 10 This is a schematic diagram of the self-resetting reinforced concrete connecting beam structure of the present invention;

[0027] Figure 11 This is a schematic diagram of the reset energy dissipation unit structure of the present invention;

[0028] Figure 12 This is a schematic diagram of the internal structure of the reset energy dissipation unit of the present invention;

[0029] In the attached diagram: 1-Reinforced concrete short beam, 2-Slotted composite steel, 3-Round hole composite steel, 4-Friction plate, 5-Force transmission steel plate, 6-High-strength bolt, 7-Locking round pipe, 8-Locking nut, 9-Disc spring assembly. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1-12As shown, the self-resetting reinforced concrete connecting beam of the present invention includes two reinforced concrete short beams 1 and a reset energy dissipation unit partially embedded in the two reinforced concrete short beams 1. The reset energy dissipation unit includes a round hole combined steel 3 and a slotted hole combined steel 2 partially embedded in the two reinforced concrete short beams 1, two friction plates 4 held by the two combined steels, high-strength bolts 6 connecting the round hole combined steel 3 with the friction plates 4 and the slotted hole combined steel 2, two force transmission steel plates 5 arranged on the top and bottom surfaces of the two combined steels, and a disc spring assembly 9 fixed on the force transmission steel plate 5 on the top surface of the two combined steels by a locking round tube 7 and a locking nut 8. The locking round tube 7 passes sequentially through the center of the disc spring assembly 9, the round hole of the top force transmission steel plate 5, the round hole of the round hole combined steel 3, and the round hole of the bottom force transmission steel plate 5, and its two ends are fixed by the two locking nuts 8.

[0032] The self-resetting reinforced concrete coupling beam of this invention is installed and used in the following manner:

[0033] 1. Place the friction plate 4 onto the outer side of the web of the box-shaped steel of the open-hole combined steel 3, then insert it into the two outlying steel plates of the slotted combined steel 2, and then insert the high-strength bolts 6 into the round holes of the web of the box-shaped steel of the open-hole combined steel 3, the round holes of the friction plate 4, and the slots of the outlying steel plates of the slotted combined steel 2 in sequence, and tighten them to the designed preload.

[0034] 2. Place the two force transmission steel plates 5 on the top and bottom surfaces of the overlapping sections of the open-circular hole combined steel 3 and the slotted hole combined steel 2, respectively. Then place the disc spring assembly 9 on the top force transmission steel plate 5. Next, insert the locking round tube 7 sequentially into the center of the disc spring assembly 9, the round hole of the top force transmission steel plate 5, the round hole of the open-circular hole combined steel 3, and the round hole of the bottom force transmission steel plate 5. Then, use equipment such as jacks to load the disc spring assembly 9 to the design preload. Finally, screw the two locking nuts 8 into both ends of the locking round tube 7 and tighten them.

[0035] 3. Place the assembled reset energy dissipation unit into the steel cage of the reinforced concrete short beam 1, and then pour concrete to embed the reset energy dissipation unit into the reinforced concrete short beam 1; at the same time, pour concrete for the reinforced concrete shear wall connected to the reinforced concrete short beam 1, thereby casting the reinforced concrete short beam 1 and the reinforced concrete shear wall into one piece.

[0036] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A friction-dissipating preloaded disc spring self-resetting reinforced concrete coupling beam, characterized in that, The connecting beam consists of two reinforced concrete short beams (1) and a reset energy dissipation unit; The reinforced concrete short beam (1) is directly cast in place with the reinforced concrete shear wall connected to it, wherein the longitudinal reinforcement of the reinforced concrete short beam (1) is inserted into the interior of the reinforced concrete shear wall. The reset energy dissipation unit is installed between two reinforced concrete short beams (1). The reset energy dissipation unit includes a round hole combined steel (3) and a slotted hole combined steel (2). The round hole combined steel (3) is composed of an I-beam section and a box-shaped steel. The slotted hole combined steel (2) is composed of an I-beam section and two outstretched steel plates. The box-shaped steel of the open-hole combined steel (3) is inserted between the two extended steel plates of the slotted-hole combined steel (2); the top and bottom surfaces of the open-hole combined steel (3) are provided with round holes; the top and bottom surfaces of the open-hole combined steel (3) are respectively provided with force-transmitting steel plates (5), and the force-transmitting steel plates (5) on the top surface of the open-hole combined steel (3) are provided with disc spring groups (9), and the center of the disc spring groups (9) is provided with locking round tubes (7); The locking tube (7) is inserted sequentially into the center of the disc spring assembly (9), the round hole of the top force transmission steel plate (5) of the open round hole combined steel (3), the round hole of the open round hole combined steel (3), and the round hole of the bottom force transmission steel plate (5) of the open round hole combined steel (3). The disc spring assembly (9) is fixed on top by a locking nut (8) with threads on its inner surface, and the force transmission steel plate (5) under the bottom of the round hole combined steel (3) is fixed on the bottom by a locking nut (8) with threads on its inner surface. A friction plate (4) is provided between the outer side of the web of the box-shaped steel of the open-hole combined steel (3) and the extended steel plate of the slotted-hole combined steel (2); the extended steel plate of the slotted-hole combined steel (2) has vertical slots, and both the web of the box-shaped steel of the open-hole combined steel (3) and the friction plate (4) have round holes. High-strength bolts (6) are inserted into the round holes and the slots, and the seismic energy is dissipated by the relative sliding of the open-hole combined steel (3) and the slotted-hole combined steel (2) with the friction plate (4) attached to it. After the reset energy dissipation unit is assembled, the I-beam sections of the round hole combined steel (3) and the slotted hole combined steel (2) are placed into the steel cage of the reinforced concrete short beam (1), and the concrete of the reinforced concrete short beam (1) is poured.

2. The friction-dissipating preloaded disc spring self-resetting reinforced concrete coupling beam according to claim 1, characterized in that, The friction between the open-hole composite steel (3) and the slotted composite steel (2) is adjusted by adjusting the preload of the high-strength bolt (6).

3. A friction-dissipating preloaded disc spring self-resetting reinforced concrete coupling beam according to claim 2, characterized in that, The preload of the disc spring assembly (9) is adjusted by adjusting the distance between the locking nut (8) on the disc spring assembly (9) and the locking nut (8) under the force transmission steel plate (5) under the bottom surface of the open-hole combined steel (3).

4. A friction-dissipating preloaded disc spring self-resetting reinforced concrete coupling beam according to claim 3, characterized in that, The stiffness of the self-resetting reinforced concrete connecting beam after energy dissipation is adjusted by adjusting the size and number of disc springs in the disc spring assembly (9).

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