A pull-out-resistant bidirectional friction pendulum seismic isolation bearing

Abstract

A pull-out-resistant bidirectional friction pendulum seismic isolation bearing comprises an upper seat plate, an upper wear-resistant sheet, a spherical crown, a lower wear-resistant sheet, a lower seat plate and a friction pull-out-resistant member; the upper wear-resistant sheet is pasted on the lower spherical surface of the upper seat plate, and the lower wear-resistant sheet is pasted on the upper spherical surface of the lower seat plate; the lower seat plate is provided with mutually perpendicular through inverted T-shaped grooves around it, and the edge of the upper seat plate is provided with a T-shaped groove perpendicular to the through inverted T-shaped groove; the friction pull-out-resistant member is composed of an upper π-shaped member, a friction connection pair, and a lower inverted T-shaped member; the upper π-shaped member cooperates with the T-shaped groove, and the lower inverted T-shaped member cooperates with the inverted T-shaped groove. The present invention has a simple structure, is easy to assemble, and is easy to repair and replace. When an earthquake occurs, it not only has the function of resisting pull-out, but also can realize horizontal bidirectional seismic isolation to avoid damage to the upper structure.

Description

Technical Field

[0001] The invention relates to the field of building seismic bearings, and in particular to an anti-pullout bidirectional friction pendulum seismic isolation bearing. Background Art

[0002] Frequent earthquakes can damage building structures, leading to casualties and economic losses. In order to improve the ability of building structures to resist damage from external loads such as earthquakes, setting up seismic isolation bearings in the structure is a simple, economical and effective measure.

[0003] At present, the commonly used seismic isolation bearings are: rubber bearings, soft steel damping bearings, friction pendulum bearings, etc. Rubber bearings are prone to aging and have poor reliability; soft steel damping bearings have low bearing capacity and high cost; friction pendulum bearings are widely used in civil engineering due to their strong self-limiting function, self-resetting ability, excellent seismic isolation and energy dissipation mechanism, etc.

[0004] When an earthquake occurs, the friction pendulum bearing can meet the needs of rotation and horizontal displacement of the upper structure, but it does not have the ability to resist vertical pull-out. Especially when subjected to large vertical earthquake forces, the components of the bearing may detach and fail, causing serious consequences.

[0005] The problem of friction pendulum bearing detachment failure can be solved by setting anti-pullout devices. There are two main anti-pullout mechanisms at present: 1. Anti-pullout by setting anti-pullout blocks on the upper and lower seat plates, such as the utility model "friction pendulum seismic isolation bearing with anti-pullout device" with application number 201420108057.9, including upper seat plate, lower seat plate, anchor bolts, plate assembly, lower plate assembly, friction pendulum spherical pendulum, and anti-pullout device. Since one end of this type of anti-pullout device is fixed, the bearing only has the function of seismic isolation in a single direction, and its application in building structures is relatively limited; 2. Anti-pullout by setting steel springs on the upper and lower seat plates, such as the invention patent "A three-dimensional seismic isolation bearing" with application number 201510228638.5, including I-shaped anti-pullout splicing plate, frame-type friction pendulum seismic isolation bearing, and shock-absorbing energy-absorbing device composed of butterfly springs. The support allows displacement of the upper and lower components connected thereto in any direction within the horizontal plane, but the support has a complex structure and is difficult to install. The spring can provide limited vertical tensile stiffness and is relatively expensive.

[0006] At present, the urgent problem to be solved for the pull-out resistant friction pendulum bearing is to ensure its pull-out resistance on the one hand and realize the horizontal bidirectional movement function of the bearing on the other hand. In order to solve the above problems, it is necessary to propose a pull-out resistant bidirectional friction pendulum seismic isolation bearing. Summary of the invention

[0007] In view of the deficiencies of the prior art, the present invention discloses a pull-out resistant bidirectional friction pendulum seismic isolation bearing with a simple structure and convenient assembly, and the bearing has the functions of pull-out resistance and horizontal bidirectional movement.

[0008] The technical solution adopted by the patent of the present invention is: a pull-out resistant bidirectional friction pendulum seismic isolation bearing, including an upper seat plate, an upper wear-resistant plate, a spherical crown, a lower wear-resistant plate, a lower seat plate and a friction pull-out resistant part, characterized in that: the upper wear-resistant plate is pasted on the lower spherical surface of the upper seat plate, and the lower wear-resistant plate is pasted on the upper spherical surface of the lower seat plate; the lower seat plate is provided with mutually perpendicular through inverted T-shaped grooves around it, and the edge of the upper seat plate is provided with a T-shaped groove perpendicular to the through inverted T-shaped groove; the friction pull-out resistant part is composed of an upper π-shaped part, a friction connection pair, and a lower inverted T-shaped part; the upper π-shaped part cooperates with the T-shaped groove, and the lower inverted T-shaped part cooperates with the inverted T-shaped groove. The upper π-shaped part is composed of an upper end plate and two parallel clamping plates, and circular holes are formed on the two parallel clamping plates; the lower inverted T-shaped part is composed of a lower end plate, a connecting plate, and friction elements attached to the surfaces of both sides of the connecting plate, and waist-shaped holes matching the circular holes are formed on the connecting plates; the upper π-shaped part and the lower inverted T-shaped part are connected as a whole through a bolt connection pair.

[0009] Furthermore, lubricant is applied inside the inverted T-shaped slide groove and the T-shaped slide groove.

[0010] The pull-out-resistant bidirectional friction pendulum seismic isolation support provided by the present invention achieves the effect of seismic isolation through the friction swing of the spherical crown body and the friction action of the friction pull-out-resistant member.

[0011] When an earthquake occurs, the upper and lower ends of the friction anti-pullout parts are located in the perpendicular grooves to each other, so that the support has the function of horizontal bidirectional movement. When the upper seat plate and the lower seat plate move relative to each other in the x direction, the friction anti-pullout parts in the x-direction T-shaped groove slide relative to the upper seat plate, and the friction anti-pullout parts in the y-direction T-shaped groove move together with the upper seat plate; when the upper seat plate and the lower seat plate move relative to each other in the y direction, the friction anti-pullout parts in the y-direction T-shaped groove slide relative to the upper seat plate, and the friction anti-pullout parts in the x-direction T-shaped groove move together with the upper seat plate. Since the existence of the friction anti-pullout parts does not constrain the horizontal movement of the upper seat plate, the movement of the upper seat plate in the x and y directions can occur simultaneously. The swing of the spherical crown causes the upper seat plate to drive the upper π-shaped part and the lower inverted T-shaped part to slide relative to each other when moving, thereby realizing friction energy consumption. The waist-shaped hole in the lower inverted T-shaped part has a limiting function to prevent excessive slippage. The invention has a simple structure and is easy to assemble, and simultaneously has the functions of vertical pull-out resistance and horizontal bidirectional seismic isolation, and can be widely used in building structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of an anti-pullout bidirectional friction pendulum seismic isolation bearing according to an embodiment of the present invention;

[0013] Figure 2 is a top view of a lower seat plate of an embodiment of the present invention;

[0014] Figure 3 is a front view of a lower seat plate of an embodiment of the present invention;

[0015] Figure 4 is a top view of an upper seat plate of an embodiment of the present invention;

[0016] Figure 5 is a front view of an upper seat plate of an embodiment of the present invention;

[0017] Figure 6 is a front view of a friction anti-pullout member according to an embodiment of the present invention;

[0018] Figure 7 yes Figure 6 A left view of the upper π-shaped member;

[0019] Figure 8 yes Figure 6 A left view of the lower inverted T-shaped member;

[0020] Fig. 9 is a top view of the structure of the embodiment of the present invention after swinging;

[0021] Fig.10 is a front view of the structure of the embodiment of the present invention after swinging;

[0022] Fig.11 yes Fig. 9 AA section view;

[0023] Fig.12 yes Fig. 9 BB cross-section diagram;

[0024] Fig.13 yes Fig.10 CC cross-section diagram. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] Reference Figure 1 This embodiment includes an upper seat plate 1, an upper wear-resistant sheet 2, a spherical crown 3, a lower wear-resistant sheet 4, a lower seat plate 5 and a friction anti-pullout member 6, and is characterized in that the upper wear-resistant sheet 2 is pasted on the lower spherical surface of the upper seat plate 1, and the lower wear-resistant sheet 4 is pasted on the upper spherical surface of the lower seat plate 5.

[0027] Reference Figure 2-5 The lower seat plate 5 is provided with mutually perpendicular through inverted T-shaped sliding grooves 7 around it, and the edge of the upper seat plate 1 is provided with a T-shaped sliding groove 8 perpendicular to the through inverted T-shaped sliding groove 7.

[0028] Reference Figure 6 The friction anti-pullout part 6 is composed of an upper π-shaped part 9, a friction connection pair 10, and a lower inverted T-shaped part 11; the upper π-shaped part 9 cooperates with the T-shaped slide groove 8, and the lower inverted T-shaped part 11 cooperates with the inverted T-shaped slide groove 7; the inverted T-shaped slide groove 7 and the T-shaped slide groove 8 are both coated with lubricant.

[0029] Reference Figure 7 The upper π-shaped member 9 is composed of an upper end plate 12 and two parallel clamping plates 13 , and circular holes 14 are opened on the two parallel clamping plates 13 .

[0030] Reference Figure 8 The lower inverted T-shaped member 11 is composed of a lower end plate 15, a connecting plate 16, and friction elements 17 attached to the surfaces of both sides of the connecting plate 16. The connecting plate 16 is provided with a waist-shaped hole 18 that matches the circular hole 14; the upper π-shaped member 9 is connected to the lower inverted T-shaped member 11 as a whole through a bolt connection pair 10.

[0031] This embodiment achieves the effect of shock absorption and isolation through the friction swing of the spherical crown 3 and the friction effect of the friction anti-pullout member 6. Figure 9-12 When an earthquake occurs, since the upper and lower ends of the friction anti-pullout member 6 are located in the perpendicular grooves to each other, the support has the function of horizontal bidirectional movement. When the upper seat plate 1 and the lower seat plate 5 move relative to each other along the x direction, the friction anti-pullout member 6 in the x-direction T-shaped groove 8 slides relative to the upper seat plate 1, and the friction anti-pullout member 6 in the y-direction T-shaped groove 8 moves together with the upper seat plate 1; when the upper seat plate 1 and the lower seat plate 5 move relative to each other along the y direction, the friction anti-pullout member 6 in the y-direction T-shaped groove 8 slides relative to the upper seat plate 1, and the friction anti-pullout member 6 in the x-direction T-shaped groove 8 moves together with the upper seat plate 1. Since the existence of the friction anti-pullout member 6 does not constrain the horizontal movement of the upper seat plate 1, the movement of the upper seat plate 1 along the x and y directions can occur simultaneously. The swinging of the spherical crown 3 causes the upper seat plate 1 to drive the upper π-shaped member 9 and the lower inverted T-shaped member 11 to slide relative to each other when moving, thereby realizing friction energy consumption. The waist-shaped hole 18 in the lower inverted T-shaped member 11 has a limiting function to prevent excessive slippage. The present invention has a simple structure and is easy to assemble. It also has the functions of vertical pull-out resistance and horizontal bidirectional seismic isolation, and can be promoted and applied in building structures.

Claims

1. An anti-pullout bidirectional friction pendulum seismic isolation bearing, comprising an upper seat plate, an upper wear-resistant sheet, a spherical crown, a lower wear-resistant sheet, a lower seat plate and a friction anti-pullout member, characterized in that: The upper wear-resistant sheet is pasted on the lower spherical surface of the upper seat plate, and the lower wear-resistant sheet is pasted on the upper spherical surface of the lower seat plate; the lower seat plate is provided with mutually perpendicular through inverted T-shaped slide grooves around it, and the edge of the upper seat plate is provided with a T-shaped slide groove perpendicular to the through inverted T-shaped slide groove; the friction anti-pullout part is composed of an upper π-shaped part, a friction connection pair, and a lower inverted T-shaped part; the upper π-shaped part cooperates with the T-shaped slide groove, and the lower inverted T-shaped part cooperates with the inverted T-shaped slide groove; The upper π-shaped piece is composed of an upper end plate and two parallel clamping plates, and the two parallel clamping plates are provided with circular holes; the lower inverted T-shaped piece is composed of a lower end plate, a connecting plate, and friction elements attached to the surfaces of both sides of the connecting plate, and the connecting plate is provided with waist-shaped holes matching the circular holes; the upper π-shaped piece and the lower inverted T-shaped piece are connected as a whole through a bolt connection pair; Lubricant is applied inside the inverted T-shaped slide groove and the T-shaped slide groove.

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