Spherical friction pendulum support with beam falling prevention function

Abstract

The utility model belongs to the technical field of bridge structures, and particularly relates to a spherical friction pendulum support with a beam falling prevention function. An upper support plate of the support is fixed to the bottom wall of a bridge, and the edge of the bottom wall of the upper support plate protrudes downwards to form a circle of anti-shearing force ring; the top end of the guide cylinder is open and upwards slidably sleeves the outer side of the lower support plate from the bottom end of the lower support plate, the bottom end of the guide cylinder is closed and fixed to a bottom plate, and the bottom plate is fixed to the top wall of an abutment; a first cushioning assembly is arranged in a cavity formed between the bottom wall of the lower support plate and the guide cylinder. Therefore, when an earthquake happens to the support, the anti-shearing force ring can be sheared off to consume about 85% of earthquake shearing force, the transverse earthquake response of a bridge is reduced, and the occurrence of a beam falling accident in the transverse direction of the bridge is prevented. In addition, the first cushioning assembly conducts damping and buffering on the lower support plate, earthquake deformation is concentrated in the cavity, earthquake energy is isolated from being transmitted to the upper structure, the earthquake response of the upper structure is reduced, and the longitudinal bridge direction beam falling accident is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge structures, and in particular relates to a spherical friction pendulum support with a beam-falling prevention function. Background Art

[0002] With the rapid development of passenger dedicated lines, high-speed railways, highways and urban interchanges in my country, the structural types of bridges have shown a diversified development trend, and other beam types with floating structures such as inclined beams, curved beams, cable-stayed bridges, etc. have emerged. Under the influence of factors such as temperature creep and wind load, these bridge structures will produce tension and lateral shear force in the opposite direction of gravity at certain bridge nodes, such as the side support points of continuous beams, the acute angles of oblique beams, and the suspended support points of cable-stayed bridges. The longer the natural vibration period of the bridge, the better the shock absorption effect. Friction pendulum bearings are often used to extend the natural vibration period.

[0003] However, the longer the natural vibration period of the bridge, the greater its displacement response, so the volume of the bearing must also be increased during design, otherwise the shock absorbing effect of the bearing will deteriorate, affecting the safety of the bridge. However, an increase in the volume of the bearing will cause trouble for bridge design and installation. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a spherical friction pendulum bearing with a beam-falling prevention function, thereby solving the technical problem that the bearing must increase its volume in order to ensure that the natural vibration period of the bridge is extended, which causes troubles in bridge design and installation.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0008] The embodiment of the utility model provides a spherical friction pendulum bearing with a beam-falling prevention function, comprising an upper bearing plate, a lower bearing plate, a guide cylinder and a bottom plate arranged from top to bottom, the upper bearing plate is fixed to the bottom wall of the bridge, the top end of the guide cylinder is open and is slid upward from the bottom end of the lower bearing plate to the outer side of the lower bearing plate, the bottom end of the guide cylinder is closed and fixed to the bottom plate, and the bottom plate is fixed to the top wall of the pier; the edge of the bottom wall of the upper bearing plate protrudes downward to form a shear resistance ring; a first shock-absorbing component is arranged in the cavity formed between the bottom wall of the lower bearing plate and the guide cylinder, the first shock-absorbing component comprises a connecting seat and a mounting seat, the connecting seat is fixed to the bottom wall of the lower bearing plate, the mounting seat is fixed to the bottom wall of the guide cylinder, a damping rod is fixed between the connecting seat and the mounting seat, a shock-absorbing spring is sleeved on the outer side of the damping rod, and both ends of the shock-absorbing spring are respectively fixed to the connecting seat and the mounting seat.

[0009] Furthermore, a plurality of second shock-absorbing components are arranged in the cavity, and the plurality of second shock-absorbing components are symmetrically arranged in pairs with the central axis of the guide cylinder as the symmetry axis; the second shock-absorbing components include two limit blocks, the two limit blocks are fixed to the bottom wall of the guide cylinder and the connecting line between the two limit blocks is arranged along the radial direction of the bottom wall of the guide cylinder, a sliding rod is fixed between the two limit blocks, the sliding rod is suspended relative to the bottom wall of the guide cylinder, a sliding sleeve is arranged on the sliding rod, the area between the limit block and the sliding slide on the side of the sliding rod close to the central axis of the guide cylinder is the first section, and the area between the limit block and the sliding slide on the side of the sliding rod away from the central axis of the guide cylinder is the second section, the outer side of the first section is sleeved with a return spring, and the two ends of the return spring are respectively fixed to the limit block and the sliding slide; a plurality of fixed blocks are arranged on the bottom wall of the lower support plate, and the plurality of fixed blocks correspond to the plurality of sliding slides one by one, a connecting rod is arranged between the fixed block and the corresponding sliding slide, and the two ends of the connecting rod are respectively hinged to the fixed block and the sliding slide, and the angle between the connecting rod and the second section of the corresponding sliding rod is always an acute angle.

[0010] Furthermore, a spherical liner is arranged between the upper support plate and the lower support plate, the top wall of the spherical liner is a horizontal plane and is provided with a first guide friction pair for forming a longitudinal guide friction between the upper support plate and the spherical liner, the upper wall of the first guide friction pair and the lower wall of the first guide friction pair are fixedly connected to the upper support plate and the spherical liner respectively; an arcuate groove is provided on the top wall of the lower support plate, the bottom wall of the spherical liner is an arcuate surface matched with the arcuate groove, and a second guide friction pair is fixedly arranged in the arcuate groove for forming a transverse guide friction between the spherical liner and the lower support plate.

[0011] Furthermore, the upper support plate, the spherical lining plate and the lower support plate are coaxially arranged.

[0012] Furthermore, the first guide friction pair and the second guide friction pair are made of nickel-chromium alloy or ordinary cast iron.

[0013] Furthermore, the upper support plate, the lower support plate, the guide cylinder, the bottom plate and the spherical liner are made of 235 steel or Q35 steel.

[0014] Furthermore, at least four stoppers symmetrical about the central axis of the lower support plate are provided on a plane of the top wall of the lower support plate located outside the arc-surface groove.

[0015] Furthermore, the bottom wall of the bottom plate is provided with at least four anchor bolts, and the anchor bolts are evenly distributed along the edge of the bottom wall of the bottom plate.

[0016] Furthermore, the first shock absorbing assembly is coaxially arranged with the lower support plate and the guide cylinder.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the utility model are:

[0019] The utility model is a spherical friction pendulum bearing with a beam-falling prevention function. Since a shear ring is arranged at the bottom wall edge of the upper bearing plate, the shear ring will be sheared off first when an earthquake occurs. In this process, nearly 85% of the earthquake shear force is consumed, reducing the lateral earthquake response of the bridge, that is, reducing the lateral displacement response of the bridge. At the same time, a guide cylinder is also sleeved on the outer side of the lower bearing plate to limit the lateral sliding of the lower bearing plate to prevent the occurrence of a beam-falling accident in the transverse direction of the bridge.

[0020] In addition, a first shock-absorbing assembly is arranged in the cavity between the lower support plate and the guide cylinder. When an earthquake occurs, the lower support plate is shock-absorbing and buffered through the cooperation of the damping rod and the shock-absorbing spring in the first shock-absorbing assembly, so that the seismic deformation is concentrated in the cavity, the transmission of seismic energy to the upper structure is isolated, and the seismic response of the upper structure is reduced. Moreover, the damping rod will also consume part of the seismic energy, further reducing the seismic response of the structure and preventing the occurrence of longitudinal bridge beam fall accidents.

[0021] Compared with the existing technology, it realizes the purpose of setting a structure between the bridge and the pier that can withstand vertical tension and lateral shear force, so as to realize the horizontal and vertical anti-falling beam functions respectively, ensuring the safety of the bridge and reducing the project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a spherical friction pendulum bearing with a beam-falling prevention function;

[0023] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0024] Figure 3 It is a schematic structural diagram of the first shock-absorbing component.

[0025] [Description of Reference Numerals]

[0026] 1: upper support plate; 11: shear ring;

[0027] 2: lower support plate; 21: stopper;

[0028] 3: guide cylinder; 31: cavity;

[0029] 4: base plate; 41: anchor bolt;

[0030] 5: first shock absorbing component; 51: connecting seat; 52: mounting seat; 53: damping rod; 54: shock absorbing spring;

[0031] 6: second shock absorbing assembly; 61: limit block; 62: slide bar; 63: slider; 64: return spring; 65: fixed block; 66: connecting rod;

[0032] 7: spherical lining; 8: first guide friction pair; 9: second guide friction pair. DETAILED DESCRIPTION

[0033] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0034] The anti-fall beam is a connection measure in the bridge structure used to resist earthquakes and prevent the beam from falling or detaching. Figure 1-3 As shown, the utility model provides a spherical friction pendulum bearing with a beam-falling prevention function, which is installed between a bridge and a pier. Figure 1-2 As shown, it includes an upper support plate 1, a lower support plate 2, a guide cylinder 3 and a bottom plate 4 arranged from top to bottom. An anchor bolt hole is opened on the upper support plate 1, and it is fixed to the bottom wall of the bridge through the anchor bolt. The bottom wall of the bottom plate 4 is provided with at least four anchor bolts 41, and a plurality of anchor bolts 41 are evenly distributed along the bottom wall edge of the bottom plate 4. The bottom plate 4 is fixed to the top wall of the pier through the anchor bolts 41.

[0035] like Figure 2 As shown, a spherical lining plate 7 is arranged between the upper support plate 1 and the lower support plate 2. The top wall of the spherical lining plate 7 is a horizontal plane and is provided with a first guide friction pair 8. The upper wall and the lower wall of the first guide friction pair 8 are respectively fixedly connected to the upper support plate 1 and the spherical lining plate 7 to reduce shock and dissipate energy between the upper support plate 1 and the spherical lining plate 7.

[0036] According to the principle of friction pendulum, the vibration period of the structure is extended by arc surface, which can greatly reduce the amplification effect caused by external vibration. An arc surface groove is provided on the top wall of the lower support plate 2, and the bottom wall of the spherical liner 7 is an arc surface adapted to the arc surface groove. A second guide friction pair 9 is fixedly arranged in the arc surface groove to form a lateral guide friction between the spherical liner 7 and the lower support plate 2.

[0037] Preferably, the upper support plate 1, the spherical liner 7 and the lower support plate 2 are coaxially arranged. The first guide friction pair 8 and the second guide friction pair 9 are made of nickel-chromium alloy or ordinary cast iron, and the upper support plate 1, the lower support plate 2 and the spherical liner 7 are made of 235 steel or Q35 steel. Among them, cast iron can be classified into ordinary cast iron and alloy cast iron according to its chemical composition. Alloy cast iron is ordinary cast iron with proper amount of alloy elements (such as silicon, manganese, phosphorus, nickel, chromium, molybdenum, copper, aluminum, boron, vanadium, tin, etc.) added to it to change the matrix structure of ordinary cast iron, so that it has corresponding heat resistance, wear resistance, corrosion resistance, low temperature resistance or non-magnetic properties.

[0038] The top wall of the lower support plate 2 is located on the plane outside the arc groove and is fixed with at least four stoppers 21 symmetrical about the central axis of the lower support plate 2 by strong bolts to limit the movement space of the spherical liner 7.

[0039] Since the shear force generated by an earthquake is sufficient to damage the bearings between the bridge and the piers, Figure 1-2 As shown, the bottom wall edge of the upper support plate 1 protrudes downward to form a shear ring 11. When an earthquake occurs, the shear ring 11 will first be sheared off by the shear force generated by the earthquake, thereby protecting the entire support.

[0040] The bottom end of the guide cylinder 3 is closed and fixed to the bottom plate 4, the top end of the guide cylinder 3 is open and is slid upward from the bottom end of the lower support plate 2 to the outer side of the lower support plate 2, thereby limiting the lateral displacement of the lower support plate 2 so that the lower support plate 2 can only be displaced longitudinally but not laterally, thereby preventing the occurrence of a beam falling accident in the lateral direction of the lower support plate 2.

[0041] like Figure 2 As shown, the lower support plate 2 can be damped in the longitudinal direction by double damping and buffering. Specifically, a first damping component 5 is arranged in the cavity 31 formed between the bottom wall of the lower support plate 2 and the guide cylinder 3. Figure 3 As shown, the first shock absorbing assembly 5 includes a connecting seat 51 and a mounting seat 52, the connecting seat 51 is fixed to the bottom wall of the lower support plate 2, the mounting seat 52 is fixed to the bottom wall of the guide cylinder 3, a damping rod 53 is fixed between the connecting seat 51 and the mounting seat 52, a damping spring 54 is sleeved on the outer side of the damping rod 53, and the two ends of the damping spring 54 are respectively fixed to the connecting seat 51 and the mounting seat 52. The lower support plate 2 can be preliminarily damped and buffered by the cooperation of the damping rod 53 and the damping spring 54. Moreover, the damping rod 53 will also consume part of the seismic energy, further reducing the seismic response of the structure. Preferably, the first shock absorbing assembly 5 is coaxially arranged with the lower support plate 2 and the guide cylinder 3.

[0042] like Figure 2 As shown, in order to further dampen the lower support plate 2, a plurality of second damping assemblies 6 are arranged in the cavity 31, and the plurality of second damping assemblies 6 are symmetrically arranged in pairs with the central axis of the guide cylinder 3 as the symmetry axis. The second damping assemblies 6 include two limit blocks 61, which are fixed to the bottom wall of the guide cylinder 3 and the connecting line between the two limit blocks 61 is arranged along the radial direction of the bottom wall of the guide cylinder 3, a slide bar 62 is fixed between the two limit blocks 61, the slide bar 62 is suspended relative to the bottom wall of the guide cylinder 3, a slide bar 63 is slidably sleeved on the slide bar 62, the area between the limit block 61 and the slide bar 63 on the side of the central axis of the guide cylinder 3 on the slide bar 62 is the first section, and the area between the limit block 61 and the slide bar 63 on the side of the central axis of the guide cylinder 3 on the slide bar 62 is the second section, and a return spring 64 is sleeved on the outer side of the first section, and the two ends of the return spring 64 are respectively fixed to the limit block 61 and the slide bar 63.

[0043] The bottom wall of the lower support plate 2 is provided with a plurality of fixed blocks 65, which correspond to the plurality of sliders 63 one by one, and a connecting rod 66 is provided between the fixed blocks 65 and the corresponding sliders 63, and the two ends of the connecting rod 66 are respectively hinged to the fixed blocks 65 and the sliders 63, and the angle between the connecting rod 66 and the second section of the corresponding slider 62 is always an acute angle. In this way, the lower support plate 2 always applies pressure to the return spring 64 when it moves downward.

[0044] The transmission of seismic energy to the upper structure is isolated by means of double shock absorption and buffering of the first shock absorbing component 5 and the second shock absorbing component 6, and the seismic deformation is concentrated in the cavity 31, thereby reducing the seismic response of the upper structure.

[0045] Preferably, the guide cylinder 3 and the bottom plate 4 are made of 235 steel or Q35 steel.

[0046] Working principle: When an earthquake occurs, the shear ring 11 will be sheared off first, and then, in the horizontal direction, the spherical liner 7 is driven by the upper support plate 1 to slide on the second guide friction pair 9. At this time, the first guide friction pair 8 performs shock absorption and energy dissipation between the upper support plate 1 and the spherical liner 7. When the spherical liner 7 slides to the stopper 21, the stopper 21 restricts the spherical liner 7 from continuing to slide. At the same time, the guide cylinder 3 also restricts the lateral sliding of the lower support plate 2 to prevent the occurrence of a horizontal beam drop accident. In the vertical direction, the first shock-absorbing component 5 performs preliminary shock absorption and buffering on the lower support plate 2, and the second shock-absorbing component 6 performs further shock absorption and buffering on the lower support plate 2. The double shock absorption and buffering formed by the first shock-absorbing component 5 and the second shock-absorbing component 6 can effectively absorb shock and buffer the lower support plate 2, so that the earthquake energy cannot be transmitted to the bridge beam body, so that the utility model can respectively realize the horizontal and vertical anti-beam drop functions, ensuring the safety of the bridge.

[0047] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0050] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0051] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A spherical friction pendulum bearing with a beam-drop prevention function, characterized in that: The invention comprises an upper bearing plate (1), a lower bearing plate (2), a guide cylinder (3) and a bottom plate (4) which are arranged from top to bottom, wherein the upper bearing plate (1) is fixed to the bottom wall of the bridge, the top end of the guide cylinder (3) is open and is slidably sleeved upward from the bottom end of the lower bearing plate (2) to the outside of the lower bearing plate (2), the bottom end of the guide cylinder (3) is closed and fixed to the bottom plate (4), and the bottom plate (4) is fixed to the top wall of the pier; The bottom wall edge of the upper support plate (1) protrudes downward to form a shear resistance ring (11); A first shock absorbing component (5) is arranged in a cavity (31) formed between the bottom wall of the lower support plate (2) and the guide cylinder (3), and the first shock absorbing component (5) comprises a connecting seat (51) and a mounting seat (52), wherein the connecting seat (51) is fixed to the bottom wall of the lower support plate (2), and the mounting seat (52) is fixed to the bottom wall of the guide cylinder (3), and a damping rod (53) is fixed between the connecting seat (51) and the mounting seat (52), and a shock absorbing spring (54) is sleeved on the outer side of the damping rod (53), and two ends of the shock absorbing spring (54) are respectively fixed to the connecting seat (51) and the mounting seat (52).

2. The spherical friction pendulum bearing with anti-beam falling function according to claim 1 is characterized in that: A plurality of second shock absorbing components (6) are arranged in the cavity (31), and the plurality of second shock absorbing components (6) are symmetrically arranged in pairs with the central axis of the guide cylinder (3) as the symmetry axis; The second shock absorbing component (6) comprises two limit blocks (61), the two limit blocks (61) are fixed to the bottom wall of the guide cylinder (3) and the connecting line between the two limit blocks (61) is arranged along the radial direction of the bottom wall of the guide cylinder (3), a sliding rod (62) is fixed between the two limit blocks (61), the sliding rod (62) is suspended relative to the bottom wall of the guide cylinder (3), a sliding block (63) is slidably sleeved on the sliding rod (62), the area between the limit block (61) and the sliding block (63) on the side of the sliding rod (62) close to the central axis of the guide cylinder (3) is the first section, and the area between the limit block (61) and the sliding block (63) on the side of the sliding rod (62) away from the central axis of the guide cylinder (3) is the second section, and a return spring (64) is sleeved on the outer side of the first section, and the two ends of the return spring (64) are respectively fixed to the limit block (61) and the sliding block (63); The bottom wall of the lower support plate (2) is provided with a plurality of fixed blocks (65), and the plurality of fixed blocks (65) correspond to the plurality of sliding blocks (63) one by one. A connecting rod (66) is provided between the fixed blocks (65) and the corresponding sliding blocks (63), and the two ends of the connecting rod (66) are respectively hinged to the fixed blocks (65) and the sliding blocks (63), and the angle between the connecting rod (66) and the second section of the corresponding sliding rod (62) is always an acute angle.

3. The spherical friction pendulum bearing with anti-beam falling function according to claim 1 is characterized in that: A spherical lining plate (7) is arranged between the upper support plate (1) and the lower support plate (2); the top wall of the spherical lining plate (7) is a horizontal plane and is provided with a first guide friction pair (8) for forming longitudinal guide friction between the upper support plate (1) and the spherical lining plate (7); the upper wall of the first guide friction pair (8) and the lower wall of the first guide friction pair (8) are fixedly connected to the upper support plate (1) and the spherical lining plate (7) respectively; The top wall of the lower support plate (2) is provided with an arcuate groove, the bottom wall of the spherical liner (7) is an arcuate surface adapted to the arcuate groove, and a second guide friction pair (9) is fixedly arranged in the arcuate groove for forming lateral guide friction between the spherical liner (7) and the lower support plate (2).

4. The spherical friction pendulum bearing with anti-beam falling function according to claim 3 is characterized in that: The upper support plate (1), the spherical lining plate (7) and the lower support plate (2) are coaxially arranged.

5. The spherical friction pendulum bearing with anti-beam falling function according to claim 3 is characterized in that: The first guide friction pair (8) and the second guide friction pair (9) are made of nickel-chromium alloy or ordinary cast iron.

6. The spherical friction pendulum bearing with anti-beam falling function according to claim 3 is characterized in that: The upper support plate (1), the lower support plate (2), the guide cylinder (3), the bottom plate (4) and the spherical lining plate (7) are made of 235 steel or Q35 steel.

7. The spherical friction pendulum bearing with anti-beam falling function according to claim 3 is characterized in that: At least four stoppers (21) are arranged symmetrically about the central axis of the lower support plate (2) on a plane located outside the arc-surface groove on the top wall of the lower support plate (2).

8. The spherical friction pendulum bearing with anti-beam falling function according to claim 1, characterized in that: The bottom wall of the bottom plate (4) is provided with at least four anchor bolts (41), and a plurality of the anchor bolts (41) are evenly distributed along the edge of the bottom wall of the bottom plate (4).

9. The spherical friction pendulum bearing with anti-beam falling function according to claim 1, characterized in that: The first shock absorbing component (5) is coaxially arranged with the lower support plate (2) and the guide cylinder (3).

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