Overturn-preventing shock insulation system for high-rise building

Abstract

The invention discloses an anti-overturning shock insulation system for a high-rise building, and belongs to the technical field of constructional engineering. The anti-overturning shock insulation system for the high-rise building comprises a shear wall and a frame structure which are arranged on a foundation, the shear wall is directly connected with the foundation; a group of mild steel dampers are arranged between the shear wall and the frame structure; a lead core rubber shock insulation support is arranged between the frame structure and the foundation. The structure is effectively prevented from overturning, the damage degree of the structure under the action of external force such as collision is reduced, the anti-seismic effect can be effectively enhanced, and a building has higher stability and safety under the action of an earthquake.

Description

Technical Field

[0001] The invention belongs to the technical field of building engineering, and in particular relates to an anti-overturning high-rise building seismic isolation system. Background Art

[0002] Base isolation technology separates the building from the ground or the upper and lower parts of the building by installing isolation devices, such as rubber isolation bearings and sliding isolation bearings, at the foundation or specific parts of the building. When an earthquake occurs, these isolation devices can effectively isolate the transmission of seismic energy, so that most of the seismic energy cannot be directly transmitted to the building, thereby reducing the seismic effects on the building. By isolating the transmission of seismic energy, extending the natural vibration period of the structure and consuming seismic energy, the response of the building in an earthquake is effectively reduced, and the seismic safety of the building is improved. Today, base isolation technology has been widely used, and its application areas cover conventional building types such as masonry structures, frame structures, and frame shear wall structures. It also plays an important role in bridges, industrial buildings and other fields.

[0003] The traditional frame shear wall isolation structure mainly consists of six parts. The superstructure is the main part of the building, which undertakes the use function and provides people with living and working space. The lower structure includes the foundation, basement, etc., which provides stable support for the entire building. In the base isolation structure, the lower structure needs to bear the vertical load transmitted from the superstructure and the isolation layer. The isolation layer, as the core component of the base isolation structure, is mainly composed of isolation bearings and other components, which can effectively block the transmission of seismic energy to the upper structure. The isolation bearing has a strong horizontal deformation capacity and can produce flexible deformation when an earthquake occurs, thereby consuming seismic energy.

[0004] Under the action of near-field pulse earthquakes and far-field long-period earthquakes, the lateral deformation of the structure is large, the isolation bearings are easily damaged, and the structure is also prone to overturning. Near-field pulse earthquakes have the characteristics of high-energy pulses, short-duration high-peak acceleration, and significant velocity pulse effects. The huge energy released instantly by this type of earthquake has a strong impact on the traditional frame shear wall structure, causing the lateral deformation of the structure to increase sharply in a short period of time. In this case, the isolation bearings need to withstand huge horizontal forces and deformations, and are likely to exceed their design bearing capacity and be damaged. At the same time, the imbalance of the horizontal force on the entire structure is aggravated, which greatly increases the risk of the structure overturning. Far-field long-period earthquakes are rich in long-period components and last for a long time. They are easy to be close to the natural vibration period of the traditional frame shear wall structure, thereby causing resonance. Long-term shaking causes the lateral deformation of the structure to accumulate continuously, and the isolation bearings are prone to fatigue damage and then destruction under the action of continuous deformation. In addition, the large overturning moment brought by the long-period earthquake further increases the possibility of the structure overturning. Summary of the invention

[0005] In view of the above-mentioned problems, the present invention proposes a seismic isolation system for anti-overturning high-rise buildings, which can effectively prevent the structure from overturning, reduce the degree of damage to the structure under external forces such as collision, and effectively enhance the seismic effect, so that the building has higher stability and safety under the action of earthquake.

[0006] The above purpose is achieved through the following technical solutions: The present invention discloses an anti-overturning high-rise building seismic isolation system, which comprises a shear wall and a frame structure arranged on a foundation; the shear wall is directly connected to the foundation; a group of mild steel dampers are arranged between the shear wall and the frame structure; and a lead rubber seismic isolation bearing is arranged between the frame structure and the foundation.

[0007] Furthermore, the left and right ends of the mild steel damper are respectively installed at the disconnection point of the cantilevered concrete slab between the shear wall and the frame structure; a patterned steel plate and a rubber plate are arranged between the disconnection point of the cantilevered concrete slab and the frame structure / shear wall, and the upper and lower sides of the mild steel damper are respectively installed between the cantilevered concrete slab and the patterned steel plate.

[0008] Furthermore, the patterned steel plate is connected to the shear wall through anchor bolts; a slope angle is formed at the intersection of the patterned steel plate and the concrete slab; and a layer of steel plate is arranged at the end of the concrete slab. Beneficial Effects

[0009] 1. The present invention directly connects the shear wall to the foundation. This connection method enables the shear wall to directly transfer horizontal forces such as earthquake force and wind load borne by the upper structure to the foundation. The shear wall itself has greater rigidity and strength. When facing the overturning moment caused by horizontal force, it can play a strong resistance role, thereby significantly enhancing the anti-overturning ability of the structure.

[0010] 2. The present invention disconnects the frame structure from the shear wall. The disconnected design reduces the interaction between the shear wall and the frame structure, avoiding structural damage caused by the uncoordinated deformation of the two during an earthquake. The independent work of the shear wall can better exert its lateral force resistance performance and protect the overall safety of the building.

[0011] 3. The present invention arranges a soft steel damper on the cantilevered concrete slab at the disconnection point between the frame structure and the shear wall. The soft steel damper has a certain deformation capacity and can coordinate the deformation between the frame structure and the shear wall, thereby directly limiting the deformation amplitude of the rubber bearing and preventing the rubber bearing from being damaged due to excessive tension caused by large deformation.

[0012] 4. The present invention arranges seismic isolation bearings between the frame structure and the foundation, and together with the measure of arranging mild steel dampers on the cantilevered concrete slab where the frame structure and the shear wall are disconnected, a hybrid control method is formed. When an earthquake occurs, the seismic isolation bearings can absorb and dissipate seismic energy through deformation, thereby reducing the seismic force on the upper structure. Soft steel dampers are arranged on the cantilevered concrete slab where the frame structure and the shear wall are disconnected. When the cantilevered concrete slab collides with the mild steel damper, it can absorb part of the energy through its own deformation, thereby reducing the seismic force on the structure and preventing excessive deformation and damage to the structure. The combination of the two significantly improves the seismic performance of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a simplified plan view of the present invention; Figure 3 is a connection arrangement diagram of the present invention; Description of reference numerals: 1. Frame structure; 2. Shear wall; 3. Mild steel damper; 4. Lead rubber isolation bearing; 5. Foundation; 6. Cantilevered concrete slab; 7. Patterned steel plate; 8. Rubber plate; 9. Anchor bolt. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] like Figure 1-3 As shown, an anti-overturning high-rise building seismic isolation system of the present invention includes a shear wall 2 and a frame structure 1 arranged on a foundation 5; the shear wall 2 is directly connected to the foundation 5; a group of soft steel dampers 3 are arranged between the shear wall 2 and the frame structure 1; and a lead core rubber seismic isolation bearing 4 is arranged between the frame structure 1 and the foundation 5.

[0016] The left and right ends of the mild steel damper 3 are respectively installed at the disconnection of the cantilevered concrete slab 6 between the shear wall 2 and the frame structure 1; a patterned steel plate 7 and a rubber plate 8 are arranged between the disconnection of the cantilevered concrete slab 6 and the frame structure 1 / shear wall 2, and the upper and lower sides of the mild steel damper 3 are respectively installed between the cantilevered concrete slab 6 and the patterned steel plate 7.

[0017] The patterned steel plate 7 is connected to the shear wall 2 through anchor bolts 9; there is a slope angle at the intersection of the patterned steel plate 7 and the concrete plate 6; and a layer of steel plate is arranged at the end of the concrete plate 6.

[0018] In order to solve the problem that high-rise buildings are prone to overturning under strong earthquakes, the present invention uses shear walls that are directly connected to the foundation and disconnected from the frame structure. This design reduces the load borne by the shear walls and improves redundancy. In practical applications, even if the frame structure undergoes significant deformation, the shear walls can still provide a certain degree of support, thereby effectively preventing the structure from overturning.

[0019] In order to solve the problem that seismic isolation bearings are easily damaged by tension and that high-rise buildings have long natural vibration periods and poor seismic isolation effects, the present invention uses a hybrid control method, that is, to place seismic isolation bearings between the frame structure and the foundation. At the same time, a soft steel damper is arranged on the cantilevered concrete slab where the frame structure and the shear wall are disconnected. On the one hand. Since there is a certain distance between the soft steel damper and the cantilevered concrete slab in play, under small earthquakes or normal use, the frame and shear wall system maintain a relatively independent working state. Under the action of larger external forces, the soft steel damper can play a certain limiting role on the lateral deformation of the frame, indirectly limiting the deformation amplitude of the rubber bearing, and avoiding damage to the rubber bearing due to excessive tension. On the other hand, when an earthquake occurs, the seismic isolation bearing can absorb and dissipate seismic energy by deformation, thereby reducing the seismic force exerted on the upper structure. A soft steel damper is arranged on the cantilevered concrete slab where the frame structure and the shear wall are disconnected. When the cantilevered concrete slab collides with the soft steel damper, the soft steel can produce a large plastic deformation, which absorbs and dissipates energy through this deformation, thereby reducing the degree of damage to the structure under external forces such as collision. This method can effectively enhance the seismic resistance and make the building more stable and safer under earthquakes.

[0020] The center of this system is the shear wall core tube, which is composed of densely arranged reinforced concrete shear walls, and the shear walls are directly connected to the foundation, with high rigidity and strength. Under the action of horizontal loads (such as earthquake force and wind load), the core tube can effectively resist lateral deformation and provide stable support for the entire building structure.

[0021] Rubber seismic isolation bearings are mainly arranged between the frame structure and the foundation to support the upper frame structure and play a role in seismic isolation. When an earthquake occurs, the seismic isolation bearings absorb and dissipate a large amount of seismic energy through their own deformation and damping characteristics, thereby reducing the seismic force exerted on the upper structure.

[0022] The shear wall is disconnected from the frame structure, and a mild steel damper is arranged on the cantilevered concrete slab at the disconnection point, and a certain gap is reserved between the mild steel damper and the cantilevered concrete slab. Under small earthquakes or normal use, the frame and shear wall system maintain a relatively independent working state; when encountering a large earthquake, the mild steel damper can absorb and dissipate a large amount of energy through its own deformation. When relative displacement occurs between the frame and the shear wall, the hysteresis characteristics of the mild steel can effectively convert the energy input by the earthquake into other forms of energy such as heat energy, thereby reducing the vibration response of the structure and reducing the seismic force on the structure.

Claims

1. A seismic isolation system for an anti-overturning high-rise building, characterized in that: The anti-overturning high-rise building seismic isolation system comprises a shear wall (2) and a frame structure (1) arranged on a foundation (5); the characteristics are that the shear wall (2) is directly connected to the foundation (5); a group of soft steel dampers (3) are arranged between the shear wall (2) and the frame structure (1); and a lead rubber seismic isolation bearing (4) is arranged between the frame structure (1) and the foundation (5).

2. The anti-overturning high-rise building seismic isolation system according to claim 1 is characterized in that: The left and right ends of the mild steel damper (3) are respectively installed at the disconnection point of the cantilevered concrete slab (6) between the shear wall (2) and the frame structure (1); a patterned steel plate (7) and a rubber plate (8) are arranged between the disconnection point of the cantilevered concrete slab (6) and the frame structure (1) / shear wall (2), and the upper and lower sides of the mild steel damper (3) are respectively installed between the cantilevered concrete slab (6) and the patterned steel plate (7).

3. The anti-overturning high-rise building seismic isolation system according to claim 1 is characterized in that: The patterned steel plate (7) is connected to the shear wall (2) via anchor bolts (9); a slope angle is formed at the intersection of the patterned steel plate (7) and the concrete plate (6); and a layer of steel plate is provided at the end of the concrete plate (6).

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