Novel assembly type embedded self-resetting swinging shear wall

Abstract

The invention discloses a novel assembly type embedded self-resetting swing shear wall which comprises a shear wall body, a shear wall foundation and dampers, the shear wall body is provided with embedded protrusions, the shear wall foundation is provided with embedded rails corresponding to the embedded protrusions, the shear wall body is connected with the shear wall foundation, the embedded protrusions are embedded in the embedded rails, and the dampers are connected with the shear wall foundation. A reserved space is formed between the bottom of the shear wall body and the shear wall foundation, the damper is installed in the reserved space, an assembly face is arranged at the bottom of the shear wall body, one end of the damper is installed on the assembly face, the other end of the damper is flush with the bottom of the reserved space, and the damper is embedded into the embedded track through the embedded protrusion. Overall swinging of the shear wall body under the horizontal load effect is simply and ingeniously achieved, the damage risk of the shear wall body is avoided, meanwhile, the shear wall body is connected with the shear wall foundation through the damper, energy consumption is conducted through displacement generated when the shear wall body swings, and the swinging deformation mode is not affected while energy consumption is achieved.

Description

Technical Field

[0001] The invention relates to the field of building structures, in particular to a novel assembled embedded self-resetting rocking shear wall. Background Art

[0002] Driven by urbanization and social development such as energy conservation and emission reduction, prefabricated buildings have developed rapidly in my country in recent years, with increasing demand. As the main system of prefabricated buildings, prefabricated concrete shear walls are widely used due to their high stiffness and strength. They are often used as the main lateral force resisting components of the structure, showing good social and economic benefits and application prospects. At present, the actual application of prefabricated shear walls is mainly based on traditional wet connections such as grouting sleeves. The current design ensures that it has sufficient strength and stiffness through the equivalent cast-in-place concept and achieves the seismic fortification target.

[0003] However, the number of vertical connecting steel bars of the edge components of the prefabricated shear wall is large and the diameter is small, resulting in many sleeves, difficulty in steel bar centering and difficulty in on-site grouting. Manual processing and tying of stirrups is time-consuming and difficult to automate. This will greatly reduce the efficiency of assembly and the energy dissipation capacity is not strong, which can easily cause damage to the wall structure and threaten the safety of the building. It can be seen that how to better realize the connection of prefabricated shear wall components and improve their energy dissipation capacity to avoid damage to the wall itself is a key issue that needs to be solved urgently. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a new type of assembled embedded self-resetting rocking shear wall, which embeds the protrusion in the embedded track to simply and cleverly realize the overall rocking of the shear wall under the action of horizontal load, thereby avoiding the risk of damage to the shear wall itself. At the same time, the shear wall is connected to the shear wall foundation through a damper, and energy is consumed through the displacement generated when the shear wall swings, thereby achieving energy consumption without affecting the rocking deformation mode.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A novel assembled embedded self-resetting rocking shear wall comprises a shear wall body, a shear wall foundation and a damper. An embedded protrusion is provided at the bottom of the shear wall body, an embedded track is provided at the portion of the shear wall foundation corresponding to the embedded protrusion, the shear wall body and the shear wall foundation are connected, the embedded protrusion is embedded in the embedded track, a reserved space is formed between the bottom of the shear wall body and the shear wall foundation, the damper is installed in the reserved space, an assembly surface is provided at the bottom of the shear wall body, one end of the damper is installed on the assembly surface, and the other end of the damper is flush with the bottom of the reserved space.

[0007] Furthermore, the damper applies pre-stress to the shear wall body and the shear wall foundation to increase the vertical stiffness. When encountering a small earthquake, the shear wall body swings in the embedded track due to the embedding protrusion being embedded in the embedded track. The damper increases the vertical stiffness to avoid damage to the shear wall body. When encountering a medium or large earthquake, the shear wall body swings in the embedded track exceeding the pre-stress applied by the damper, and the damper dissipates energy in the relative motion.

[0008] Furthermore, the surfaces of the embedded protrusion and the embedded track are both covered with polytetrafluoroethylene material, and the friction between the two contact surfaces of the embedded protrusion and the embedded track is reduced by covering with polytetrafluoroethylene material.

[0009] Furthermore, the damper includes an upper fixing plate, a lower fixing plate and a ring spring damper, the ring spring damper is installed between the upper fixing plate and the lower fixing plate, the upper fixing plate and the lower fixing plate have the same structure, and both are provided with a first fixing hole, and the upper fixing plate and the lower fixing plate are fixed by the first fixing hole in combination with the first fixing bolt.

[0010] Furthermore, the upper fixing plate and the lower fixing plate are provided with a first connecting seat, and second connecting seats are provided at both ends of the ring spring damper. The ring spring damper is connected to the first connecting seats of the upper fixing plate and the lower fixing plate through the second connecting seat. The second connecting seat and the first connecting seat are correspondingly provided with second fixing holes, and a second fixing bolt is installed in the second fixing hole.

[0011] Furthermore, the outer ring diameter of the ring spring damper in the damper is D2, and D2 cannot be greater than the thickness of the shear wall. The inner ring inner diameter D1 of the ring spring damper is determined according to the value of D2, and D1 is calculated using the following formula;

[0012] D2=D1+2(b+b1)+(h-δ0)tanβ (1)

[0013] In formula (1), D2 is the diameter of the outer ring of the ring spring damper, D1 is the inner diameter of the inner ring of the ring spring damper, b is the thickness of the outer ring, b1 is the thickness of the inner ring, h is the height of a single ring of the ring spring damper, δ0 is the distance between two adjacent rings in the free state, and β is the cone angle of the ring.

[0014] Furthermore, the height of the damper is greater than the height of the plastic hinge of the shear wall, and the height of the ring spring damper is L, which is calculated using the following formula;

[0015] L=0.08H+0.15L w (2)

[0016] In formula (2), L is the height of the ring spring damper, H is the height of the shear wall, and L w is the width of the shear wall.

[0017] Furthermore, the friction coefficient f between the ring spring damping ring is μand friction angle ρ, select a ring spring damper with good lubrication conditions, and the friction coefficient f μ The values ​​of the friction angle ρ are selected under the following conditions; heavy-load working conditions without fine machining of the contact surface: ρ≈9°, f μ ≈0.16; Heavy-duty working conditions with finely machined contact surface: ρ≈8°30', f μ ≈0.15; light load working condition with finely machined contact surface: ρ≈7°, f μ ≈0.12.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, an embedding protrusion is provided at the bottom of the shear wall body, and an embedding track is provided at the portion of the shear wall foundation corresponding to the embedding protrusion. The shear wall body and the shear wall foundation are connected, and the embedding protrusion is embedded in the embedding track. A reserved space is formed between the bottom of the shear wall body and the shear wall foundation. The damper is installed in the reserved space. An assembly surface is provided at the bottom of the shear wall body, and one end of the damper is installed on the assembly surface, and the other end of the damper is flush with the bottom of the reserved space. The embedding protrusion is embedded in the embedding track, so that the overall swing of the shear wall body under the action of horizontal load is simply and cleverly realized, avoiding the risk of damage to the shear wall body itself. At the same time, the shear wall body is connected to the shear wall foundation through the damper, and energy is consumed by the displacement generated when the shear wall body swings, and the swing deformation mode is not affected while achieving energy consumption.

[0020] The present invention covers the contact surface between the embedded protrusion and the embedded track with polytetrafluoroethylene material, thereby reducing the friction between the two contact surfaces, thereby avoiding damage to the contact surface concrete caused by friction when the shear wall body swings, protecting the shear wall body, and increasing the displacement of the shear wall body by reducing the friction between the contact surfaces, so that the damper can play a better role.

[0021] The embedded track of the present invention can provide a limiting effect, prevent the shear wall from being out of control outside the plane of the wall body, and improve the safety of the shear wall body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below in conjunction with the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of a novel assembled embedded self-resetting rocking shear wall of the present invention;

[0024] Figure 2 This is an exploded view of a novel assembled embedded self-resetting rocking shear wall of the present invention;

[0025] Figure 3 Schematic diagram of the structure of the damper in the present invention (I);

[0026] Figure 4 This is a schematic diagram of the structure of the damper in the present invention (II).

[0027] In the figure: 1-shear wall body; 2-shear wall foundation; 3-damper; 4-embedded protrusion; 5-embedded track; 6-reserved space; 7-assembly surface; 8-upper fixing plate; 9-lower fixing plate; 10-ring spring damping; 11-first fixing hole; 12-first fixing bolt; 13-first connecting seat; 14-second connecting seat; 15-second fixing hole; 16-second fixing bolt. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] like Figures 1 to 4 As shown, a novel assembled embedded self-resetting rocking shear wall of the present invention comprises a shear wall body 1, a shear wall foundation 2 and a damper 3. An embedding protrusion 4 is provided at the bottom of the shear wall body 1, and an embedding track 5 is provided at a portion of the shear wall foundation 2 corresponding to the embedding protrusion 4. The shear wall body 1 and the shear wall foundation 2 are connected, and the embedding protrusion 4 is embedded in the embedding track 5. A reserved space 6 is formed between the bottom of the shear wall body 1 and the shear wall foundation 2, and the damper 3 is installed in the reserved space 6. The bottom of the shear wall body 1 is provided with a plurality of embedded protrusions 4, and the embedded protrusions 4 are embedded in the embedded track 5. An assembly surface 7 is provided, one end of the damper 3 is installed on the assembly surface 7, and the other end of the damper 3 is flush with the bottom of the reserved space 6. The damper 3 is embedded in the embedding track 5 through the embedding protrusion 4, so that the overall swing of the shear wall body 1 under the horizontal load is simply and cleverly realized, avoiding the risk of damage to the shear wall body 1 itself. At the same time, the shear wall body 1 is connected to the shear wall foundation 2 through the damper 3, and energy is consumed through the displacement generated when the shear wall body 1 swings, without affecting the swing deformation mode while achieving energy consumption.

[0030] The damper 3 applies pre-stress to the shear wall body 1 and the shear wall foundation 2 to increase the vertical stiffness. When a small earthquake occurs, the shear wall body 1 swings in the embedded track 5 due to the embedding protrusion 4 being embedded in the embedded track 5. The damper 3 increases the vertical stiffness to avoid damage to the shear wall body 1. When a medium or large earthquake occurs, the shear wall body 1 swings in the embedded track 5 exceeding the pre-stress applied by the damper 3, and the damper 3 dissipates energy in the relative motion.

[0031] The surfaces of the embedded protrusion 4 and the embedded track 5 are covered with polytetrafluoroethylene material. By covering with polytetrafluoroethylene material, the friction between the two contact surfaces of the embedded protrusion 4 and the embedded track 5 is reduced, thereby avoiding damage to the contact surface concrete caused by friction when the shear wall 1 swings. While protecting the shear wall 1, the friction between the contact surfaces is reduced, the displacement of the shear wall 1 is increased, and the damper 3 can play a better role.

[0032] The present invention can realize multi-earthquake level control through the above structural design. During small earthquakes, the wall body sways as a whole and remains elastic. During medium and large earthquakes, the damper 3 consumes energy. After the earthquake, the wall body basically remains elastic and the damage is not obvious. At the same time, the shear wall body 1 and the shear wall foundation 2 adopt an assembled structure. The shear wall body 1 itself sways as a whole during an earthquake, avoiding damage to the shear wall body 1 itself. The damper 3 is designed to withstand multiple cycles, can be reused, and can be used continuously. This means that they can be used at any time in multiple earthquakes, any subsequent aftershocks will not pose an additional threat, and can be quickly and conveniently replaced and repaired, with high economic benefits.

[0033] The damper 3 includes an upper fixing plate 8, a lower fixing plate 9 and a ring spring damper 10. The ring spring damper 10 is installed between the upper fixing plate 8 and the lower fixing plate 9. The upper fixing plate 8 and the lower fixing plate 9 have the same structure and are both provided with a first fixing hole 11. The upper fixing plate 8 and the lower fixing plate 9 are both fixed by the first fixing hole 11 in combination with the first fixing bolt 12.

[0034] The upper fixing plate 8 and the lower fixing plate 9 are provided with a first connecting seat 13, and second connecting seats 14 are provided at both ends of the ring spring damper 10. The ring spring damper 10 is connected to the first connecting seats 13 of the upper fixing plate 8 and the lower fixing plate 9 through the second connecting seat 14. The second connecting seat 14 and the first connecting seat 13 are correspondingly provided with second fixing holes 15. A second fixing bolt 16 is installed in the second fixing hole 15. The ring spring damper 10 is fixed between the upper fixing plate 8 and the lower fixing plate 9 through the second fixing bolt 16. The overall structure is simple and easy to install.

[0035] The damper 3 in the present invention can be reasonably designed according to the actual needs and the specific needs of the wall energy consumption, wherein the outer ring diameter of the ring spring damper 10 in the damper 3 is D2, D2 cannot be greater than the thickness of the shear wall 1, and the value of D2 is generally the same as the thickness of the shear wall 1. Then, the inner ring inner diameter D1 of the ring spring damper 10 is determined according to the value of D2, and D1 is calculated using the following formula;

[0036] D2=D1+2(b+b1)+(h-δ0)tanβ (1)

[0037] In formula (1), D2 is the diameter of the outer ring of the ring spring damper 10, D1 is the inner diameter of the inner ring of the ring spring damper 10, b is the thickness of the outer ring, b1 is the thickness of the inner ring, h is the height of a single ring of the ring spring damper 10, δ0 is the distance between two adjacent rings in the free state, and β is the cone angle of the ring.

[0038] The outer ring diameter and the inner ring inner diameter of the ring spring damper 10 are calculated by the above formula, so as to facilitate the selection of the damper 3 .

[0039] Among them, the value of the height h of a single ring is generally Where D is the median diameter of the contact surface of the annular cone. When h is too small, the cross-sectional area of ​​the annulus is small and the stress is large. At the same time, the contact surface area of ​​the cone is small and the surface stress increases. When h is too large, the cross-sectional thickness of the annulus is small and manufacturing is difficult.

[0040] The outer ring thickness b and the inner ring thickness b1 are related to the strength requirements and are generally selected in the initial selection. Since the cross section of the outer ring is subject to tensile stress and the cross section of the inner ring is subject to compressive stress, but the tensile fatigue strength of the material is lower than the compressive fatigue strength, therefore, under the conditions of the same height h and the same material, in order to make the outer ring and the inner ring achieve similar strength, b>b1 should be set, and b=1.3b1 can generally be taken.

[0041] In addition, to avoid damage to the shear wall 1, the height of the damper 3 should be greater than the height of the plastic hinge of the shear wall. The height of the ring spring damper 10 is L, and L is calculated using the following formula:

[0042] L=0.08H+0.15L w (2)

[0043] In formula (2), L is the height of the ring spring damper 10, H is the height of the shear wall, and L w is the width of the shear wall.

[0044] Ring spring damping 10 Friction coefficient between the rings f μ and friction angle ρ, select a ring spring damper with good lubrication conditions 10, friction coefficient f μ The values ​​of the friction angle ρ are selected under the following conditions; heavy-load working conditions without fine machining of the contact surface: ρ≈9°, f μ ≈0.16; Heavy-duty working conditions with finely machined contact surface: ρ≈8°30', f μ ≈0.15; light load working condition with finely machined contact surface: ρ≈7°, f μ ≈0.12.

[0045] The implementation methods of the present invention are not limited to these. According to the above-mentioned embodiments of the present invention, by using conventional technical knowledge and customary means in the field, without departing from the above-mentioned basic technical ideas of the present invention and without conflict, the above-mentioned preferred embodiments may also be modified, replaced or combined in various other forms, and the other embodiments obtained all fall within the scope of protection of the present invention.

Claims

1. A new type of assembled embedded self-resetting rocking shear wall, characterized by: It includes a shear wall body, a shear wall foundation and a damper. The bottom of the shear wall body is provided with an embedded protrusion, and the part of the shear wall foundation corresponding to the embedded protrusion is provided with an embedded track. The shear wall body and the shear wall foundation are connected, and the embedded protrusion is embedded in the embedded track. A reserved space is formed between the bottom of the shear wall body and the shear wall foundation. The damper is installed in the reserved space. The bottom of the shear wall body is provided with an assembly surface, one end of the damper is installed on the assembly surface, and the other end of the damper is flush with the bottom of the reserved space.

2. A novel assembled embedded self-resetting rocking shear wall according to claim 1, characterized in that: The damper applies pre-stress to the shear wall body and the shear wall foundation to increase the vertical stiffness. When a small earthquake occurs, the shear wall body sways in the embedded track due to the embedding protrusion being embedded in the embedded track. The damper increases the vertical stiffness to avoid damage to the shear wall body. When a medium or large earthquake occurs, the shear wall body sways in the embedded track beyond the pre-stress applied by the damper, and the damper dissipates energy in relative motion.

3. According to claim 1, a novel assembled embedded self-resetting rocking shear wall is characterized by: The surfaces of the embedding protrusion and the embedding track are both covered with polytetrafluoroethylene material, and the friction between the two contact surfaces of the embedding protrusion and the embedding track is reduced by covering with the polytetrafluoroethylene material.

4. The novel assembled embedded self-resetting rocking shear wall according to claim 1 is characterized in that: The damper includes an upper fixing plate, a lower fixing plate and a ring spring damper, wherein the ring spring damper is installed between the upper fixing plate and the lower fixing plate, the upper fixing plate and the lower fixing plate have the same structure and are both provided with a first fixing hole, and the upper fixing plate and the lower fixing plate are both fixed by the first fixing hole in combination with a first fixing bolt.

5. A novel assembled embedded self-resetting rocking shear wall according to claim 4, characterized in that: The upper fixing plate and the lower fixing plate are provided with a first connecting seat, and second connecting seats are provided at both ends of the ring spring damper. The ring spring damper is connected to the first connecting seats of the upper fixing plate and the lower fixing plate through the second connecting seat, and the second connecting seat and the first connecting seat are correspondingly provided with second fixing holes, and second fixing bolts are installed in the second fixing holes.

6. The novel assembled embedded self-resetting rocking shear wall according to claim 4 is characterized in that: The outer ring diameter of the ring spring damper in the damper is D2, and D2 cannot be greater than the thickness of the shear wall. The inner ring inner diameter D1 of the ring spring damper is determined according to the value of D2, and D1 is calculated using the following formula; D2=D1+2(b+b1)+(h-δ0)tanβ (1) In formula (1), D2 is the diameter of the outer ring of the ring spring damper, D1 is the inner diameter of the inner ring of the ring spring damper, b is the thickness of the outer ring, b1 is the thickness of the inner ring, h is the height of a single ring of the ring spring damper, δ0 is the distance between two adjacent rings in the free state, and β is the cone angle of the ring.

7. The novel assembled embedded self-resetting rocking shear wall according to claim 4 is characterized in that: The height of the damper is greater than the height of the plastic hinge of the shear wall. The height of the ring spring damper is L, which is calculated using the following formula; L=0.08H+0.15L w (2) In formula (2), L is the height of the ring spring damper, H is the height of the shear wall, and L w is the width of the shear wall.

8. The novel assembled embedded self-resetting rocking shear wall according to claim 4 is characterized by: The friction coefficient f between the ring spring damping rings μ and friction angle ρ, select a ring spring damper with good lubrication conditions, and the friction coefficient f μ The values ​​of the friction angle ρ are selected from the following conditions: Heavy-duty working conditions with unfinished contact surfaces: ρ≈9°, f μ ≈0.16; Heavy-duty working conditions with finely machined contact surfaces: ρ≈8°30′, f μ ≈0.15; Light-load working conditions with finely machined contact surfaces: ρ≈7°, f μ ≈0.12.

Images