Replaceable connecting beam with double insurance mechanism

Abstract

The present invention discloses a replaceable coupling beam with a dual safety mechanism, comprising a replaceable component and concrete connecting beams at both ends of the replaceable component. The replaceable component includes a metal damper, a position-limited anti-buckling restraint support device, a replaceable component connecting plate, and a metal damper connecting plate. In the replaceable coupling beam with a dual safety mechanism, the metal damper undergoes concentrated plastic damage under the influence of a large earthquake or main shock. If the metal damper fails and cannot be replaced in time under a super-large earthquake or a large aftershock, the position-limited anti-buckling restraint support takes effect, continuing plastic energy consumption. This concentrates plastic damage in the replaceable component, protecting the rest of the structure from irreparable damage.

Description

Technical Field

[0001] The present invention belongs to the technical field of structural engineering earthquake resistance, and relates to a replaceable energy dissipation coupling beam technology applied to a coupled shear wall, and in particular to a replaceable coupling beam with a double insurance mechanism. Background Art

[0002] With the development and maturity of earthquake resistance and shock absorption research, most building structures can withstand strong earthquakes without collapsing, and the number of casualties in earthquakes has been effectively controlled. However, post-earthquake building damage is difficult and time-consuming to repair, and some buildings may even have to be demolished and rebuilt. The economic losses and social impacts caused are still enormous.

[0003] The earthquake recovery function can ensure that the basic functions of the structure are not lost in minor earthquakes, and the basic functions are restored in time after major earthquakes. This allows the structure to resist disasters during earthquakes and recover quickly after earthquakes, greatly improving disaster relief efficiency and reducing earthquake losses. In high-rise buildings, reinforced concrete shear walls, as important lateral force-resisting components, are often formed into coupled shear walls due to openings required for construction. For reinforced concrete coupled shear walls, their earthquake recovery function can be improved by installing replaceable coupling beams. The replaceable coupling beams transfer damage at both ends of the coupling beam to the replaceable components. By concentrating the plasticity of the replaceable components, the structural function can be quickly restored by replacing the damaged components after the earthquake, thereby improving the recovery function of the coupled shear walls.

[0004] Chinese utility model patent CN202644774U discloses a replaceable steel coupling beam, which includes a replaceable section placed in the middle of the span and non-energy dissipation beam sections placed at both ends of the replaceable section; a replaceable section end plate is provided at each end of the replaceable section; the non-energy dissipation beam section has a connecting end plate at one end and is connected to a shear wall at the other end; the replaceable section end plate is connected to the non-energy dissipation beam section end plate by high-strength bolts.

[0005] The above-mentioned replaceable coupling beams can concentrate plastic damage to the replaceable components under the action of a larger earthquake, and can perform well under the action of a rarely designed earthquake. However, the performance of the shear wall during and after an earthquake mainly depends on the replaceable energy-absorbing components in the middle. In actual application, uncontrollable factors such as manufacturing errors, aftershocks after the main earthquake, and super-strong earthquakes may occur. Once the replaceable energy-absorbing components are severely damaged and lose their function under the action of these uncontrollable factors, the connection between the wall members will be lost, and the damage will be concentrated in the wall members, making it difficult to repair after the earthquake. Summary of the Invention

[0006] Based on the problems existing in the background technology, the purpose of the present invention is to provide a replaceable connecting beam with a double insurance mechanism. The replaceable component adopts a double damper, and the double damper sequentially yields and dissipates energy mechanism to ensure that the replaceable component can still function under the influence of uncontrollable factors, thereby protecting the wall limbs and the main structure from irreparable damage, and effectively improving the post-earthquake functional recovery capacity of the reinforced concrete shear wall structure. The metal damper serves as the first insurance, providing stiffness under smaller earthquakes and yielding energy under larger earthquakes; the limited anti-buckling restraint support device serves as the second insurance, which is designed not to participate in work under large earthquakes, and enters plastic energy dissipation and concentrated damage under aftershocks or super-large earthquakes. Through this replaceable connecting beam with a double insurance mechanism, damage is always concentrated on the replaceable connecting beam component, and the wall limbs and other main components can avoid irreparable damage, thereby overcoming the defects of the existing technology. After the earthquake, the damaged component can be quickly removed to restore the function, and the earthquake recovery function of the shear wall is improved.

[0007] In order to achieve the purpose, the technical solution provided by the present invention is:

[0008] The present invention relates to a replaceable connecting beam with a double insurance mechanism, which includes a replaceable component and concrete connecting beams located at both ends of the replaceable component. The replaceable component includes a metal damper, a limit buckling restraint support device, a replaceable component connecting plate and a metal damper connecting plate. The two ends of the metal damper are connected to the metal damper connecting plate. The limit buckling restraint support device is arranged on the outside of the metal damper, and its two ends are connected to the replaceable component connecting plate. The metal damper connecting plate is connected to the replaceable component connecting plate by bolts, and the replaceable component connecting plate is fixed to the concrete connecting beam by bolts.

[0009] Preferably, outer end connecting plates are provided on opposite sides of the concrete connecting beam, and the replaceable component connecting plates are connected to the outer end connecting plates by bolts.

[0010] Preferably, the concrete connecting beam has a built-in embedded steel plate, which is welded to the outer end connecting plate.

[0011] Preferably, the width of the metal damper connecting plate is smaller than the width of the replaceable component connecting plate, so that the two ends of the position limiting anti-buckling restraint support device can be installed on the two side edges of the replaceable component connecting plate.

[0012] Preferably, the metal damper is an I-shaped steel member as a whole, consisting of two upper and lower transverse steel plates and a longitudinal steel plate, and the upper and lower ends of the longitudinal steel plate are respectively fixed to the middle of the transverse steel plate.

[0013] Preferably, the limit anti-buckling restraint support device is arranged on the front and rear sides of the metal damper, and the two limit anti-buckling restraint support devices on the front and rear sides are arranged diagonally opposite to each other, and the two ends of the limit anti-buckling restraint support device are fixed to the replaceable component connecting plate through triangular stiffening plates.

[0014] Preferably, the limiting anti-buckling restraint support device includes a tensile and compressive energy-absorbing component and two limiting devices; the limiting device includes a steel box and a sliding steel plate, the sliding steel plate is arranged inside the steel box and is slidably connected to the steel box; the sliding contact surface is smoothed to reduce friction resistance, the initial position of the sliding steel plate is located in the middle of the steel box, and the two ends of the tensile and compressive energy-absorbing component pass through the steel box and are welded to the sliding steel plate.

[0015] Preferably, the tensile and compressive energy absorbing component is a mild steel rod or mild steel plate or a cross-shaped steel plate, a steel sleeve is provided on the tensile and compressive energy absorbing component, and a filling layer is provided in the gap between the tensile and compressive energy absorbing component and the steel sleeve, and the steel sleeve is used to prevent the tensile and compressive energy absorbing component from buckling, instability and damage.

[0016] Preferably, the steel box is a closed structure composed of steel plates.

[0017] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] 1. The double-insurance mechanism of the replaceable coupling beam in the present invention causes concentrated plastic damage to the metal damper under the action of a large earthquake or a main shock. If the metal damper fails and there is no time to replace it under the action of a super-large earthquake or a large aftershock, the limited anti-buckling restrained support will continue to dissipate plastic energy, thereby concentrating the plastic damage on the replaceable component and protecting the rest of the structure from irreparable damage.

[0019] 2. The metal damper serving as the first insurance in the present invention is connected to the limit buckling restraint support connecting plate serving as the second insurance with bolts. The two can be separated and replaced after an earthquake. Generally, only the metal damper serving as the first insurance needs to be replaced to restore the structural function, which enables rapid and economical component replacement after an earthquake.

[0020] 3. The two dampers in the present invention consume plastic energy successively, and the limited anti-buckling restraint support consumes friction energy when the slider steel plate slides, and concentrates the difficult-to-repair plastic damage on the replaceable components of the connecting beam, which not only enhances the seismic resistance and shock absorption capabilities, but also reduces the post-earthquake repair costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural stereogram of the present invention;

[0022] Figure 2 It is a main structural diagram of the present invention;

[0023] Figure 3It is a schematic structural diagram of the position-limited anti-buckling restraint support device in the present invention;

[0024] Figure 4 The limit of the steel plate movement position in the present invention is shown as follows Figure 1 ;

[0025] Figure 5 The limit of the steel plate movement position in the present invention is shown as follows Figure 2 ;

[0026] Figure 6 It is a structural schematic diagram of the metal damper in the present invention.

[0027] Notes on the diagram:

[0028] 1-Replaceable component; 2-Concrete connecting beam; 3-Metal damper; 4-Buckling restraint support device; 5-External end connecting plate; 6-Replaceable component connecting plate; 7-Metal damper connecting plate; 8-Embedded steel plate; 9-Triangular stiffening plate; 31-Transverse steel plate; 32-Longitudinal steel plate; 41-Limiting device; 42-Tension and compression energy absorption component; 43-Steel sleeve; 411-Steel box; 412-Steel sleeve. DETAILED DESCRIPTION

[0029] In order to further understand the content of the present invention, the present invention is described in detail with reference to the examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0030] like Figure 1 and Figure 2 As shown, this embodiment relates to a replaceable connecting beam with a double insurance mechanism, which is applied to high-rise shear wall structures to improve their post-earthquake recoverability. It includes a replaceable component 1 and a concrete connecting beam 2 located at both ends of the replaceable component 1. The replaceable component 1 includes a metal damper 3, a limit anti-buckling restraint support device 4, a replaceable component connecting plate 6 and a metal damper connecting plate 7. The two ends of the metal damper 3 are connected to the metal damper connecting plate 7. The limit anti-buckling restraint support device 4 is arranged on the outside of the metal damper 3, and its two ends are connected to the replaceable component connecting plate 6. The metal damper connecting plate 7 is connected to the replaceable component connecting plate 6 by bolts, and the replaceable component connecting plate 6 is fixed to the concrete connecting beam by bolts 2.

[0031] like Figure 1As shown, outer end connecting plates 5 are provided on opposite sides of the concrete connecting beam 2, and the replaceable component connecting plate 6 is bolted to the outer end connecting plate 5. The concrete connecting beam 2 has an embedded steel plate 8 welded to the outer end connecting plate 5. The width of the metal damper connecting plate 7 is smaller than that of the replaceable component connecting plate 6, allowing the ends of the position-limited anti-buckling restraint support device 4 to be mounted on the two side edges of the replaceable component connecting plate 6.

[0032] like Figure 6 As shown, the metal damper 3 is an I-shaped steel member as a whole, consisting of two upper and lower transverse steel plates 31 and a longitudinal steel plate 32. The upper and lower ends of the longitudinal steel plate 32 are respectively fixed to the middle of the transverse steel plate 31; both ends of the metal damper 3 are connected to the metal damper connecting plate 7. The limited anti-buckling restraint support device 4 is arranged on the front and rear sides of the metal damper 3. The two limited anti-buckling restraint support devices 4 on the front and rear sides are arranged diagonally opposite to each other, and the ends of the limited anti-buckling restraint support devices 4 are fixed to the replaceable component connecting plate 6 through triangular stiffening plates 9. After the earthquake, if the metal damper 3 needs to be replaced but the limited anti-buckling restraint support device 4 does not need to be replaced, the bolts of the metal damper 3 are removed, and the original limited anti-buckling restraint support device 4 is installed together with the metal damper 3 after replacement.

[0033] like Figure 3 As shown, the limiting anti-buckling restraint support device 4 includes two limiting devices 41 and a tensile and compressive energy-absorbing component 42; the limiting device 41 includes a steel box 411 and a sliding steel plate 412, the steel box 411 is a closed structure composed of steel plates, and the sliding steel plate 412 is arranged inside the steel box 411 and is slidably connected to the steel box 411; the two ends of the tensile and compressive energy-absorbing component 42 pass through the steel box 411 and are welded to the sliding steel plate 412.

[0034] The tensile and compressive energy absorbing component 42 is a soft steel rod, which is covered with a steel sleeve 43. A filling layer is provided in the gap between the tensile and compressive energy absorbing component 42 and the steel sleeve 43. The steel sleeve 43 is used to prevent the soft steel rod from buckling and becoming unstable and damaged.

[0035] like Figure 3 As shown, the starting position of the sliding steel plate 412 is located in the middle of the steel box 411. Under the action of external load, the metal damper 3 plays a role, and the limit anti-buckling restraint support device 4 only plays a role in friction energy consumption. The sliding steel plate 412 moves to the left or to the right in the steel box 411 (as shown in FIG. Figure 4 and Figure 5As shown). The relationship between the sliding distance d and the ultimate displacement du of the metal damper 3 is: d = du / sinα, where α is the horizontal angle between the limit buckling restraint support device 4 and the horizontal line, thereby ensuring that the limit buckling restraint support device 4 does not consume damping energy when the metal damper 3 is in effect. When the metal damper 3 reaches the ultimate damage, the sliding steel plate 412 slides to the extreme position of the left or right end of the steel box 411 (as shown). Figure 4 and Figure 5 As shown in FIG, the tensile and compressive energy absorbing component 42 generates tensile and compressive plastic deformation under the action of external load, thereby realizing tensile and compressive energy absorption.

[0036] The installation principle of the present invention is:

[0037] Step 1: Coat the surface of the tensile and compressive energy dissipation member 42 with a non-adhesive material, then cover it with a buckling restraint steel sleeve 43 and fill it with filler material. A hole is drilled in one side of the steel plate that will serve as the steel box 411. The inner diameter of the hole is 1-2 mm larger than the cross-section of the tensile and compressive energy dissipation member 42. Insert the tensile and compressive energy dissipation member 42 and weld its ends to the sliding steel plate 412. Finally, weld the remaining steel plates together to form a closed steel box 411.

[0038] Step 2: Weld triangular stiffening plates 9 to the two ends of the limit buckling restraint support device 4 (i.e., steel box 411), and weld and fix the triangular stiffening plates 9 to the replaceable component connecting plate 6 according to the diagonal position relationship. The limit buckling restraint support devices 4 on the front and rear sides are arranged in opposite diagonal directions.

[0039] Step 3: Connect the prefabricated metal damper 3 and the metal damper connecting plate 7 to the replaceable component connecting plate 6 through bolts. The width of the metal damper connecting plate 7 is smaller than the width of the replaceable component connecting plate 6, and assemble them to form the replaceable component 1.

[0040] Step 4: Fix the formwork of the concrete connecting beam 2, place the embedded steel plate 8 and the outer end connecting plate 5 in the formwork of the concrete connecting beam 2, and connect the metal damper connecting plate 7 to the outer end connecting plate 5 on the concrete connecting beam 2 with bolts, thereby completing the fixation of the replaceable component 1 and the concrete connecting beams 2 at both ends.

[0041] Step 5: Tie up the concrete connecting beam 2 and the steel bars in other parts of the structure, pour concrete, and after the concrete reaches the required strength, remove the formwork of the concrete connecting beam 2. You can lay decorative panels in the middle of the connecting beam for building decoration.

[0042] The steps of post-earthquake repair of the present invention are:

[0043] Step 1: Check the metal damper 3 and the limit anti-buckling restraint support device 4 to determine whether they need to be replaced.

[0044] Step 2: If both the metal damper 3 and the limit anti-buckling restraint support device 4 need to be replaced, remove the replaceable component connecting plate 6 from the outer end connecting plate 5, reassemble the replaceable component 1, and install the assembled replaceable component 1 on the outer end connecting plate 5; if only the metal damper 3 is replaced, just remove the metal damper connecting plate 7 from the replaceable component connecting plate 6, replace the metal damper 3, and then install the metal damper 3 and the original limit anti-buckling restraint support device 4 together.

[0045] Step 3: Check the rest of the structure and make simple repairs.

[0046] The present invention improves the earthquake recovery function of the coupled shear wall in a high-rise shear wall structure. It adopts a replaceable coupling beam with a double insurance mechanism. The metal damper 3 and the limit anti-buckling restraint support device 4 of the replaceable coupling beam component 1 successively plastically dissipate energy. This ensures that the damage to the coupled shear wall is not only concentrated on the replaceable coupling beam component 1 under a large earthquake and a main shock, but also always concentrated on the replaceable coupling beam component 1 under a super-large earthquake and a large aftershock. After the earthquake, the damaged metal damper 3 can be replaced alone or the metal damper 3 and the limit anti-buckling restraint support device 4 can be replaced. The rest of the structure does not need to be repaired or can be repaired simply, and the normal function of the structure can be quickly restored. The structure of the present invention has strong sustainable earthquake resistance and low life cycle cost. It can be widely used in the field of earthquake resistance of reinforced concrete structures and has good application prospects and technical and economic benefits.

[0047] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings are only embodiments of the present invention, and the actual structure is not limited thereto. Therefore, those skilled in the art can, inspired by the above, design structures and embodiments similar to the technical solution without creatively designing them without departing from the purpose of the present invention, and all of them should fall within the scope of protection of the present invention.

Claims

1. A replaceable connecting beam with a double insurance mechanism, characterized in that: It includes a replaceable component and concrete connecting beams located at both ends of the replaceable component. The replaceable component includes a metal damper, a position-limited anti-buckling restraint support device, a replaceable component connecting plate and a metal damper connecting plate. The two ends of the metal damper are connected to the metal damper connecting plate. The position-limited anti-buckling restraint support device is provided on the outside of the metal damper, and its two ends are connected to the replaceable component connecting plate. The metal damper connecting plate is connected to the replaceable component connecting plate by bolts, and the replaceable component connecting plate is fixed to the concrete connecting beam by bolts. The said limit anti-buckling restraint support device is arranged on the front and rear sides of the metal damper, and the two limit anti-buckling restraint support devices on the front and rear sides are arranged diagonally opposite to each other, and the two ends of the limit anti-buckling restraint support device are fixed to the replaceable component connection plate through triangular stiffening plates; The position-limiting anti-buckling restraint support device includes a tensile and compressive energy-absorbing component and two position-limiting devices; the position-limiting device includes a steel box and a sliding steel plate, the sliding steel plate is arranged inside the steel box and is slidably connected to the steel box; the two ends of the tensile and compressive energy-absorbing component pass through the steel box and are welded to the sliding steel plate; the starting position of the sliding steel plate is located in the middle of the steel box; The tensile and compressive energy absorbing components are mild steel bars, mild steel plates or cross-shaped steel plates. A steel sleeve is provided on the tensile and compressive energy absorbing components. A filling layer is provided in the gap between the tensile and compressive energy absorbing components and the steel sleeve. The replaceable components use dual dampers and utilize the dual dampers' sequential yield energy dissipation mechanism. The metal damper serves as the first line of insurance, providing stiffness under smaller earthquakes and yielding energy dissipation under larger earthquakes. The limited anti-buckling restraint support device serves as the second line of insurance. It is designed not to work under large earthquakes, and enters plastic energy dissipation and concentrated damage under aftershocks or super-large earthquakes.

2. The replaceable connecting beam with double insurance mechanism according to claim 1, characterized in that: An outer end connecting plate is provided on the opposite side of the concrete connecting beam, and the replaceable component connecting plate is connected to the outer end connecting plate by bolts.

3. The replaceable connecting beam with double insurance mechanism according to claim 1, characterized in that: The concrete connecting beam has a built-in embedded steel plate, which is welded to the outer end connecting plate.

4. The replaceable connecting beam with a double safety mechanism according to claim 1, characterized in that: The width of the metal damper connecting plate is smaller than the width of the replaceable component connecting plate.

5. The replaceable connecting beam with double insurance mechanism according to claim 1, characterized in that: The metal damper is an I-shaped steel member as a whole, consisting of two upper and lower transverse steel plates and a longitudinal steel plate, wherein the upper and lower ends of the longitudinal steel plate are respectively fixed to the middle of the transverse steel plate.

6. The replaceable connecting beam with double insurance mechanism according to claim 1, characterized in that: The steel box is a closed structure composed of steel plates.

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