A tensile and compressive multi-frequency vibration-isolating cylindrical friction pendulum bearing

Abstract

The present invention discloses a tensile and compressive resistant multi-frequency seismic isolation cylindrical friction pendulum bearing, the bearing comprises an upper pendulum, an upper pendulum slide plate, an upper pendulum fastener, a rotating body, a rotating slide plate, a lower pendulum fastener, a lower pendulum slide plate and a lower pendulum which are arranged in sequence; the upper pendulum and the lower pendulum are arranged in a staggered manner, the lower surface of the upper pendulum is provided with two flanges I on both sides along its length direction, the upper surface of the upper pendulum fastener is provided with limiting plates I matching with the flanges I on both sides, the lower surface edge of the upper pendulum fastener is provided with an annular limiting protrusion, the upper surface edge of the lower pendulum fastener is provided with an annular limiting protrusion, the annular limiting protrusion and the annular limiting protrusion match each other, the upper surface of the lower pendulum is provided with two flanges II on both sides along its length direction, and the lower surface of the lower pendulum fastener is provided with limiting plates II matching with the flanges II on both sides. The present invention realizes the horizontal longitudinal and transverse bridge direction limiting and angle rotation functions under normal circumstances; realizes the seismic reduction and isolation and automatic reset after earthquake during earthquake; and the support has the tensile resistance and torsion suppression functions during the entire operation process.

Description

Technical Field

[0001] The invention belongs to the technical field of building and bridge structures, and in particular relates to a tensile and compressive multi-frequency vibration-reducing cylindrical friction pendulum bearing. Background Art

[0002] The tension on a building can be considered as the overturning force caused by horizontal seismic loads or wind loads and the upward force of vertical seismic vibrations exceeding the deadweight of the structure. Buildings that use seismic isolation technology, especially those with large height-to-width ratios or light spatial structures, will experience a large column tension due to the overturning moment when they are subjected to earthquakes or wind loads, which can easily lead to overturning and instability problems. Torsion of buildings is also one of the main factors causing damage. The most fundamental point in ensuring the stability of buildings under torsion is how to guide the building to move in a predetermined horizontal direction to reduce the possibility of torsion. It can be seen that in addition to the usual vertical bearing capacity support, sliding displacement, horizontal stiffness, and good fire resistance, the performance requirements of buildings for seismic isolation bearings should also have vertical tensile resistance and torsion suppression functions.

[0003] The bearings used in bridge construction include plate bearings, spherical bearings, pot bearings, etc. The structure of the spherical bearing includes an upper middle plate, a spherical core, and a lower middle plate. A plane friction pair is set between the upper middle plate and the spherical core, and a spherical friction pair is set between the spherical core and the lower middle plate. During installation, the spherical bearing is directly fixed to the supporting pad stone and the bottom of the beam. In normal use, ordinary spherical bearings can meet the operation requirements of the bridge, but in sudden situations such as strong winds and earthquakes, ordinary spherical bearings cannot meet the requirements of tensile resistance and shock absorption, and will transfer seismic energy from the pier to the beam body, causing damage to the bridge and structural destruction. Summary of the invention

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a tensile and compressive multi-frequency seismic isolation cylindrical friction pendulum bearing, which can meet the requirements of normal use of buildings and bridge structures in non-seismic conditions, and have seismic isolation, tension resistance and torsion suppression functions during earthquakes, so as to solve the problems existing in the seismic isolation bearings of existing buildings and bridges.

[0005] To achieve the above-mentioned objectives, the present invention provides a cylindrical friction pendulum bearing with tensile and compressive multi-frequency seismic isolation functions, the bearing comprising an upper pendulum 1, an upper pendulum slide plate 5, an upper pendulum fastener 2, a rotating body 6, a rotating slide plate 7, a lower pendulum fastener 3, a lower pendulum slide plate 8 and a lower pendulum 4 which are arranged in sequence; the upper pendulum 1 and the lower pendulum 4 are arranged in an alternating manner, and two flanges I are arranged on both sides of the lower surface of the upper pendulum 1 along its length direction, and limiting plates I matching the flanges I are arranged on both sides of the upper surface of the upper pendulum fastener 2, an annular limiting protrusion is arranged on the edge of the lower surface of the upper pendulum fastener 2, and an annular limiting protrusion is arranged on the edge of the upper surface of the lower pendulum fastener 3, and the annular limiting protrusion matches the annular limiting protrusion, and two flanges II are arranged on both sides of the upper surface of the lower pendulum 4 along its length direction, and limiting plates II matching the flanges II are arranged on both sides of the lower surface of the lower pendulum fastener 3.

[0006] Furthermore, the lower surface of the upper swing 1 is a concave cylindrical surface, and the upper surface of the upper swing fastener 2 is a convex cylindrical surface matching the concave cylindrical surface.

[0007] Furthermore, the upper surface of the hem 4 is a concave cylindrical surface, and the lower surface of the hem fastener 3 is a convex cylindrical surface matching the concave cylindrical surface.

[0008] Furthermore, the lower surface of the rotating body 6 is an outwardly convex spherical surface, and the upper surface of the hem fastener 3 is an inwardly concave spherical surface.

[0009] Furthermore, the flange I is integrally arranged with the upper swing fastener 2 or is detachably connected.

[0010] Furthermore, the flange II is integrally formed with the hem fastener 3 or is detachably connected thereto.

[0011] Furthermore, the annular limiting protrusion is integrally arranged with the upper swing fastener 2 or is detachably connected thereto.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The support is connected by the upper swing, upper swing fastener, lower swing fastener and lower swing, so it has the function of resisting pull-out. The swing surface of the multi-frequency tension and compression friction swing support is a cylindrical surface, and the rotation is provided by the rotating body alone. The tension and compression swing of the support has obvious directionality, and the swing direction is also limited by the swing fastener, which is safe and controllable;

[0014] The bearing structure has two cylindrical surfaces arranged alternately up and down to realize bidirectional sliding and bidirectional swinging of the bearing in the longitudinal and transverse directions of the bridge. When the sliding distance is designed to be zero in both directions, it is a fixed bearing. When it is zero in one direction and non-zero in the other direction, it is a one-way bearing. When it is non-zero in both directions, it is a two-way bearing.

[0015] The tensile and compressive multi-frequency tensile and compressive friction pendulum bearing can have three inherent frequencies during the swinging operation. The upper part swings alone as one frequency, the lower part swings alone as one frequency, and the upper and lower parts swing simultaneously as one frequency. The upper and lower independent frequencies correspond to the upper and lower independent stiffness and damping, and the frequency of the upper and lower parts swinging simultaneously corresponds to an equivalent stiffness and damping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the transverse structure of the cylindrical friction pendulum support with tensile and compressive multi-frequency seismic isolation function of the present invention; Figure 2 It is a schematic diagram of the longitudinal structure of the cylindrical friction pendulum support with tensile and compressive multi-frequency seismic isolation function of the present invention. DETAILED DESCRIPTION

[0017] 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 in 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. In the embodiments of the present invention, first, second, etc. are only used to distinguish different description objects unless otherwise specified.

[0018] like Figure 1 and Figure 2 As shown, the present invention provides a tensile and compressive resistant multi-frequency seismic isolation cylindrical friction pendulum bearing, the bearing comprises an upper pendulum 1, an upper pendulum slide plate 5, an upper pendulum fastener 2, a rotating body 6, a rotating slide plate 7, a lower pendulum fastener 3, a lower pendulum slide plate 8 and a lower pendulum 4 which are arranged in sequence; the upper pendulum 1 and the lower pendulum 4 are arranged in a staggered manner, and two flanges I are arranged on both sides of the lower surface of the upper pendulum 1 along its length direction, and limiting plates I matching with the flanges I are arranged on both sides of the upper surface of the upper pendulum fastener 2, an annular limiting protrusion is arranged on the edge of the lower surface of the upper pendulum fastener 2, and an annular limiting protrusion is arranged on the edge of the upper surface of the lower pendulum fastener 3, and the annular limiting protrusion and the annular limiting protrusion match each other, and two flanges II are arranged on both sides of the upper surface of the lower pendulum 4 along its length direction, and limiting plates II matching with the flanges II are arranged on both sides of the lower surface of the lower pendulum fastener 3.

[0019] The upper swing 1 and the upper swing fastener 2 are limited by the flange 1 and the limit plate 1. When impacted or an earthquake occurs, the upper swing 1 moves along the circumferential direction of the cylindrical surface on the upper swing fastener 2 through the upper swing slide plate 5, which can provide the normal sliding function of the support and the friction swing function under the earthquake state. At the same time, the upper swing fastener 2 provides the movement limit and tensile resistance function of the upper swing 1. When a movement shear limit device is set in the movement direction, the support has no normal sliding function, and only provides the friction swing function when the shear device breaks under the earthquake state.

[0020] The upper hem fastener 2 and the lower hem fastener 3 are connected by the matching annular limiting protrusions and annular limiting protrusions, so that the rotating body 6 is wrapped between the upper hem fastener 2 and the lower hem fastener 3, and the upper hem fastener 2, the rotating body 6, the rotating slide plate 7 and the lower hem fastener 3 are connected and pulled together. The rotating body 6, the rotating slide plate 7 and the lower hem fastener 3 form a rotating friction pair to ensure the normal rotation angle design of the support.

[0021] The hem 4 and the hem fastener 3 are limited by the flange II and the limit plate II. When impacted or an earthquake occurs, the hem 4 moves along the circumferential direction of the cylindrical surface on the hem fastener 3 through the hem slide plate 8, which can provide the normal sliding function of the support and the friction swing function under the earthquake state. At the same time, the hem fastener 3 provides the movement limit and tensile resistance function of the hem 4. When a movement anti-shear limit device is set in the movement direction, the support has no normal sliding function, and only provides the friction swing function when the anti-shear device breaks under the earthquake state.

[0022] The swinging and sliding function of the upper hem 1 and the lower hem 4, the designed turning function of the rotating body 6 and the tensile function of the support are realized by the upper hem 1, the upper hem fastener 2, the swing fastener) and the lower hem 4 through the mutually coordinated limiting structure; the staggered upper hem 1 and the lower hem 4 also better realizes the multi-frequency swinging function of the support.

[0023] The lower surface of the upper hem 1 is a concave cylindrical surface, and the upper surface of the upper hem fastener 2 is a convex cylindrical surface matching the concave cylindrical surface; the upper surface of the lower hem 4 is a concave cylindrical surface, and the lower surface of the lower hem fastener 3 is a convex cylindrical surface matching the concave cylindrical surface. The concave cylindrical surface of the lower surface of the upper hem 1 and the concave cylindrical surface of the upper surface of the lower hem 4 are staggered, preferably at 90°.

[0024] The lower surface of the rotating body 6 is an outward convex spherical surface, and the upper surface of the hem fastener 3 is an inward concave spherical surface; when the support turns an angle, the rotating body 6 rotates to release the energy generated by the upper structure.

[0025] The flange I is integrally arranged with the upper swing fastener 2 or detachably connected, the flange II is integrally arranged with the lower swing fastener 3 or detachably connected, and the annular limiting protrusion is integrally arranged with the upper swing fastener 2 or detachably connected.

[0026] The bearings of this embodiment realize the horizontal longitudinal and transverse bridge direction limiting and rotation functions under normal circumstances; realize the seismic isolation and automatic reset functions after earthquakes; and the bearings have the functions of resisting tension and inhibiting torsion during the entire operation process.

[0027] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A tensile and compressive multi-frequency seismic isolation cylindrical friction pendulum bearing, characterized in that: The support comprises an upper swing (1), an upper swing slide plate (5), an upper swing fastener (2), a rotating body (6), a rotating slide plate (7), a lower swing fastener (3), a lower swing slide plate (8) and a lower swing (4) which are arranged in sequence; The upper hem (1) and the lower hem (4) are arranged in a staggered manner; The lower surface of the upper hem (1) is provided with two flanges I on both sides along the length direction thereof, the upper surface of the upper hem fastener (2) is provided with limiting plates I matching with the flanges I on both sides, and the lower surface edge of the upper hem fastener (2) is provided with an annular limiting protrusion; the upper surface edge of the lower hem fastener (3) is provided with an annular limiting protrusion, the annular limiting protrusion matches with the annular limiting protrusion, the upper surface of the lower hem (4) is provided with two flanges II on both sides along the length direction thereof, and the lower surface of the lower hem fastener (3) is provided with limiting plates II matching with the flanges II on both sides; The lower surface of the upper swing (1) is an inner concave cylindrical surface, and the upper surface of the upper swing buckle (2) is an outer convex cylindrical surface matching the inner concave cylindrical surface; The flange I is integrally arranged with the upper swing fastener (2) or is detachably connected thereto.

2. The tensile and compressive multi-frequency seismic isolation cylindrical friction pendulum bearing according to claim 1 is characterized in that: The upper surface of the hem (4) is an inwardly concave cylindrical surface, and the lower surface of the hem fastener (3) is an outwardly convex cylindrical surface matching the inwardly concave cylindrical surface.

3. The tensile and compressive multi-frequency seismic isolation cylindrical friction pendulum bearing according to claim 1 is characterized in that: The lower surface of the rotating body (6) is an outward convex spherical surface, and the upper surface of the hem fastener (3) is an inward concave spherical surface.

4. The tensile and compressive multi-frequency seismic isolation cylindrical friction pendulum bearing according to claim 1 is characterized in that: The flange II is integrally arranged with the hem fastener (3) or is detachably connected thereto.

5. The tensile and compressive multi-frequency seismic isolation cylindrical friction pendulum bearing according to claim 1 is characterized in that: The annular limiting protrusion is integrally arranged with the upper swing fastener (2) or is detachably connected thereto.

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