CN111878538A - Shearing type energy-consumption beam-falling-preventing device - Google Patents
Shearing type energy-consumption beam-falling-preventing device Download PDFInfo
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- 238000005265 energy consumption Methods 0.000 title claims abstract description 93
- 238000010008 shearing Methods 0.000 title abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 145
- 230000002265 prevention Effects 0.000 claims abstract description 28
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims description 79
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- 239000003351 stiffener Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 43
- 238000013461 design Methods 0.000 abstract description 18
- 238000006073 displacement reaction Methods 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract description 4
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- 238000005452 bending Methods 0.000 description 13
- 230000008901 benefit Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- -1 polytetrafluoroethylene Polymers 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
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- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000012942 design verification Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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Abstract
The invention relates to the technical field of bridge anti-beam-falling energy consumption, in particular to a shearing type energy consumption and beam-falling prevention device which comprises a first installation seat and a second installation seat, wherein a yielding type metal energy consumption assembly is arranged between the first installation seat and the second installation seat, the first installation seat and the second installation seat are in sliding connection, the first installation seat is connected with a limiting part, the first installation seat is connected with a movable component through a connecting part, and the movable component can drive the first installation seat to move relative to the second installation seat so as to enable the yielding type metal energy consumption assembly to generate shearing type dislocation. The device breaks through the limitation that the existing shearing type dislocation metal damper is difficult to meet the displacement requirement of seismic isolation and reduction design of bridge engineering, is favorable for reducing the cost of the device, improves the rigidity and the bearing capacity of the energy-consumption beam-falling prevention device, increases the effectiveness of energy consumption capability and continuous energy consumption, protects the bridge structure from earthquake damage, and is beneficial to restoration after earthquake.
Description
Technical Field
The invention relates to the technical field of bridge anti-falling energy consumption, in particular to a shearing type energy consumption anti-falling device.
Background
The bridge limiting device is a key structure of bridge structure seismic resistance and is mainly used for preventing a beam from falling caused by overlarge relative displacement of an upper structure and a lower structure, so that the beam falling prevention device is generally adopted in bridge engineering of a seismic region.
The anti-falling device for the highway bridge in China in the prior art generally adopts concrete stop blocks, high-strength steel pull rods, high-strength steel cables and the like, and the anti-falling device for the railway bridge generally adopts various stop block forms formed by processing based on I-shaped steel, is lack of buffering capacity, cannot dissipate energy through self deformation, often needs to be provided with energy dissipation devices such as other dampers and the like independently to dissipate seismic energy, leads to increase of engineering cost, needs to design and place space for the energy dissipation devices independently, and is poor in adaptability of a high-intensity seismic area. And few power consumption and prevent the power consumption stop device that the roof beam combines that falls also adopt the buckled plate as the power consumption component, but in order to adapt to less installation space, the ripple amplitude and the ripple number of buckled plate are limited, lead to in the practical application that the displacement of warping is limited, the power consumption ability is limited to, and when the ripple amplitude of buckled plate is great, the ripple number is more, its stability is not good in the deformation process, is difficult to effectively exert design power consumption ability.
Disclosure of Invention
The invention aims to overcome the defects that the deformation size and the energy consumption capability of the conventional bridge energy consumption limiting device are limited by the wave folding amplitude and the wave folding quantity when a corrugated plate is used as an energy consumption component, but the deformation stability is poor when the wave folding amplitude is large and the wave folding quantity is large, and provides a shear type energy consumption anti-beam-falling device.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a shearing type power consumption beam device of preventing falling, contains first mount pad and second mount pad, be equipped with yield type metal power consumption subassembly between first mount pad and the second mount pad, first mount pad and second mount pad sliding connection, first mount pad is connected with spacing part, first mount pad passes through adapting unit and connects the movable component, the movable component can drive first mount pad for the motion of second mount pad and then make the yield type metal power consumption subassembly takes place shearing type dislocation.
During the use, the movable component is used for connecting the roof beam body, the second mount pad is used for connecting the pier, perhaps the movable component is used for connecting the pier, the second mount pad is used for connecting the roof beam body, can dissipate the energy at pier roof beam relative motion's in-process, and the second mount pad body can play the spacing function of rigidity, prevents the emergence of roof beam after exceeding the power consumption stroke.
The yield type metal energy dissipation assembly is an energy dissipation component in the prior art, and compared with the existing cantilever beam type metal damper, the yield type metal energy dissipation assembly has the advantages of being large in initial rigidity, high in material utilization rate, closer to ideal elastic-plastic property in hysteresis curve form and strong in energy dissipation capacity. The shear-type dislocation means that the relative displacement generated at the two ends of the yielding metal energy consumption component is in a shear type.
By adopting the shear-type energy-consumption beam-falling prevention device, the yield-type metal energy-consumption assembly is arranged between the first mounting seat and the second mounting seat, so that the superposition of rigidity, bearing capacity and energy-consumption capacity is facilitated, the first mounting seat and the second mounting seat are in sliding connection, when a beam body moves relative to a pier, the movable component can be driven to move relative to the second mounting seat, so that two ends of the yield-type metal energy-consumption assembly yield due to shear-type dislocation, and further earthquake energy is dissipated, the limiting component is used for limiting the maximum deformation between the first mounting seat and the second mounting seat, the damage degree of the damper is controlled, the energy-consumption assembly of the device is prevented from failing after the performance degradation and the damage of the damper, the service life of the damper is prolonged, and the moment of the limiting component is matched with the moment of the yield-type metal energy-consumption assembly, so that the yield-type metal energy-consumption assembly can be effectively constrained along the direction perpendicular to the movement of the yield-type metal energy-consumption assembly The rotation in the direction, the strength, the position and the number of the limiting parts are designed according to the maximum bearing capacity of the damper in the maximum design deformation, and the design parameters of the yield type metal energy dissipation assembly are designed according to design requirements.
The device effectively breaks through the limitation that the existing shearing type dislocation metal damper is difficult to meet the displacement requirement of seismic mitigation and isolation design of bridge engineering, can exert the performance advantage of the yielding type metal damper, has scientific and concise structural design, is convenient to process and install, consumes energy by adopting the yielding type metal energy consumption assembly to generate shearing dislocation, is favorable for reducing the cost of the device, improves the energy consumption capacity, improves the rigidity and the bearing capacity of the energy consumption anti-falling beam device, guarantees the effectiveness of continuous energy consumption, prolongs the service life of the device, obviously improves the anti-seismic performance of the anti-falling beam to the bridge structure, protects the bridge structure from seismic damage, and is favorable for repairing after earthquake.
Preferably, the first mounting seat comprises a diaphragm plate, the second mounting seat comprises a first frame member, the diaphragm plate is arranged in the first frame member, the two ends of the diaphragm plate are respectively provided with the limiting part, two side walls of the first frame member are provided with sliding grooves, the limiting parts are slidably connected to the sliding grooves, one end of the yield metal energy dissipation assembly is connected to the diaphragm plate, and the other end of the yield metal energy dissipation assembly is connected to the inner wall of the first frame member.
The yielding type metal energy dissipation assembly is fixed between the first installation seat and the second installation seat which are sleeved and limited at two ends, the translation of the yielding type metal energy dissipation assembly along the direction perpendicular to the moving direction of the yielding type metal energy dissipation assembly and the rotation of the yielding type metal energy dissipation assembly along the moving direction of the yielding type metal energy dissipation assembly are effectively and fully restrained, the first installation seat and the second installation seat are enabled to generate parallel relative displacement as much as possible, ideal deformation energy dissipation deformation conditions are further provided for the yielding type metal energy dissipation assembly, and the energy dissipation advantages of the yielding type metal energy dissipation assembly are fully exerted.
Preferably, the yielding metal energy dissipation assemblies are arranged on two sides of the diaphragm plate.
The energy consumption capacity is further effectively increased in a limited space, the deformation stability is better, the continuous repeated dislocation under the earthquake action is facilitated to perform deformation energy consumption, and the continuous energy consumption and the safety of a bridge structure under the earthquake action are facilitated to be ensured.
Further preferably, the movable member includes a limit groove, and a slider is disposed at an end of the connecting member and slidably connected to the limit groove.
Through setting up the spacing groove, and make the slider can all have the clearance with the spacing both sides of spacing groove, can make in bridge normal use stage, can make the slider can slide for the spacing groove when warping such as temperature, load, also can follow the axial slip of spacing groove, adopts above-mentioned mode of setting up to make the roof beam body realize two-way activity under normal operation state, avoids energy consumption component to participate in work under normal operation state simultaneously and influences the structure internal force of bridge construction under normal operation state.
Further preferably, the outer side of the limiting groove is provided with a first stiffening rib, the connecting part comprises a connecting rod, and the side wall of the connecting rod is provided with a second stiffening rib.
Preferably, the yielding metal energy dissipation assembly comprises a plurality of shearing metal energy dissipation pieces, a web of each shearing metal energy dissipation piece is arranged along the movement direction of the first mounting seat relative to the second mounting seat, each shearing metal energy dissipation piece is connected with a buckling-restrained clamping plate, and each buckling-restrained clamping plate comprises a clamping plate stiffening rib.
The shearing type metal energy dissipation sheet is low in cost and beneficial to reducing the construction cost and the maintenance cost. The buckling-restrained clamp plate with the clamp plate stiffening ribs is additionally arranged outside the web plate of the shearing type metal energy dissipation sheet, so that the web plate is further prevented from buckling, and a polytetrafluoroethylene patch is adhered between the buckling-restrained clamp plate and the web plate, so that the friction coefficient is reduced.
Preferably, the yielding type metal energy dissipation assembly comprises a plurality of double-curvature type bending type metal energy dissipation pieces, and a web of each double-curvature type bending type metal energy dissipation piece is arranged along a movement direction perpendicular to the first mounting seat relative to the second mounting seat.
The bending metal damper mainly depends on yield dissipation energy of metal like a shearing metal damper, and compared with a cantilever type bending metal damper, the double-curvature bending metal damper has the advantages of higher initial rigidity, higher material utilization rate, fuller hysteresis curve form and higher energy consumption capacity under the condition of the same steel consumption.
Preferably, the yield type metal energy dissipation assembly is installed in an assembly mode, and replacement after an earthquake is facilitated.
Preferably, the bending-type metal energy dissipation device further comprises a third installation seat, the second installation seat is connected with the third installation seat in a sliding mode, a plurality of bending-type metal energy dissipation assemblies are arranged between the second installation seat and the third installation seat, the second installation seat is connected with a limiting part, and the movable component can drive the second installation seat to move relative to the third installation seat so that the bending-type metal energy dissipation assemblies between the second installation seat and the third installation seat are subjected to shearing-type dislocation.
The method is characterized in that a layer of yield type metal energy consumption assembly is added, a first layer of yield type metal energy consumption assembly and a second layer of yield type metal energy consumption assembly are connected in series, deformation is distributed according to rigidity, the maximum deformation capacity of each layer of yield type metal energy consumption assembly is overlapped to form a multi-stage energy consumption structure, multi-stage anti-seismic performance design is achieved, and the maximum deformation capacity of the device is effectively increased. Of course, a fourth mounting seat and a fifth mounting seat … can be additionally arranged according to actual needs, and yield type metal energy dissipation components can be correspondingly arranged.
Preferably, the third mounting seat includes a second frame member, the second frame member is disposed on an outer layer of the second mounting seat, and the yielding type metal energy dissipation assembly between the first mounting seat and the second mounting seat is disposed opposite to the yielding type metal energy dissipation assembly between the second mounting seat and the third mounting seat.
The second layer of frame nested structure is formed, the dampers of the first layer and the second layer of dampers are respectively arranged on the inner side and the outer side of the corresponding mounting plate in a symmetrical mode, the ideal deformation energy consumption condition is further provided for the yield type metal energy consumption assembly of the second level, and in the design verification stage, the multilayer dampers are convenient to simulate in series, the structural design is convenient, and the assembly and the field installation are convenient.
Preferably, the yield bearing capacity of the yielding metal energy dissipation assembly between the first mounting seat and the second mounting seat is less than or equal to the yield bearing capacity of the yielding metal energy dissipation assembly between the second mounting seat and the third mounting seat, and the ultimate bearing capacity of the yielding metal energy dissipation assembly between the first mounting seat and the second mounting seat is greater than the yield bearing capacity of the yielding metal energy dissipation assembly between the second mounting seat and the third mounting seat.
All the metal energy dissipation sheets in each layer are in a parallel system, the displacement of each metal energy dissipation sheet is equal, all the layers are connected in series, the total stress of each layer is equal, the displacement of each layer is distributed according to the proportion of the sum of the rigidity of the metal energy dissipation sheets of each layer, in order to achieve the function goal of multi-level energy dissipation, the deformation of the metal energy dissipation assembly of the previous layer is larger than or equal to the deformation of the metal energy dissipation assembly of the next layer, when the deformation of the previous layer reaches the designed maximum deformation, the deformation is continuously transmitted to the next layer, and the deformation of the previous layer is not continuously increased. By adopting the arrangement mode, plastic deformation is mainly concentrated on the first layer during small earthquakes, namely, the fatigue life of the yielding type metal energy dissipation assembly arranged between the first mounting seat and the second mounting seat is only consumed, and when larger earthquakes occur, the rest layers can participate in work in succession.
Further preferably, a polytetrafluoroethylene plate is arranged between contact surfaces of the first mounting seat and the second mounting seat, and a polytetrafluoroethylene plate is also arranged between contact surfaces of the second mounting seat and the third mounting seat.
The friction resistance is reduced, friction self-locking when relative displacement occurs on each layer is avoided, and the actual deviation of the design bearing capacity of the device is reduced.
Preferably, the limiting member comprises a pin having a round end shape in cross section.
The end shape of the sliding groove is matched with the cross-sectional shape of the pin.
In summary, compared with the prior art, the invention has the beneficial effects that:
1. the shearing energy-consumption beam-falling prevention device effectively breaks through the limitation that the conventional shearing type dislocation metal damper is difficult to meet the displacement requirement of seismic mitigation and isolation design of bridge engineering, meets the deformation requirement of a yield type metal energy-consumption assembly, can exert the performance advantage of the yield type metal damper, has scientific and concise structural design, convenient processing and convenient installation, consumes energy by adopting the dislocation of the yield type metal energy-consumption assembly, is favorable for reducing the cost of the device, improving the energy-consumption capacity, improving the rigidity and the bearing capacity of the energy-consumption beam-falling prevention device, ensuring the effectiveness of continuous energy consumption, prolonging the service life of the device, remarkably improving the seismic performance of the beam-falling prevention device on a bridge structure, protecting the bridge structure from earthquake damage and restoring the bridge structure after earthquake.
2. By adopting the shear type energy-consumption beam-falling prevention device, the beam body can realize bidirectional movement in a normal operation state, and meanwhile, the influence of the energy-consumption components participating in the work in the normal operation state on the structural internal force of the bridge structure in the normal operation state is avoided.
3. By adopting the shearing type energy-consumption beam-falling-prevention device, the multi-stage anti-seismic performance design is realized, the maximum deformation capacity of the device is effectively increased, and ideal deformation energy-consumption conditions are provided for the shearing type dislocation metal damper.
Description of the drawings:
fig. 1 is a schematic structural diagram of a shear-type energy-consuming beam-falling prevention device according to embodiment 1;
fig. 2 is a schematic view of an internal structure of a shear-type energy-consuming beam-falling prevention device according to embodiment 1;
fig. 3 is a schematic connection diagram of the anti-buckling splint according to embodiment 1;
FIG. 4 is a first schematic structural diagram of a shear-type metal energy dissipation sheet according to embodiment 1;
FIG. 5 is a schematic structural diagram of a shear-type metal energy dissipation sheet according to example 1;
fig. 6 is a schematic structural diagram of a shear-type energy-consuming beam-falling prevention device according to embodiment 2;
fig. 7 is a schematic view of an internal structure of a shear-type energy-consuming beam-falling prevention device according to embodiment 2;
fig. 8 is a schematic structural diagram of a shear-type energy-consuming beam-falling prevention device according to embodiment 3;
fig. 9 is a first schematic structural diagram of a bent metal energy dissipation sheet according to embodiment 3;
fig. 10 is a second schematic structural view of the bent metal energy dissipation sheet according to embodiment 3.
The labels in the figure are: 11-a first mounting seat, 12-a second mounting seat, 13-a third mounting seat, 2-a yield type metal energy dissipation component, 3-a limiting component, 4-a connecting component, 41-a sliding block, 5-a movable component, 61-a first stiffening rib, 62-a second stiffening rib, 71-a buckling-preventing splint and 72-a splint stiffening rib.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
The shear type energy-consumption beam-falling prevention device comprises a first installation seat 11 and a second installation seat 12, a yield type metal energy-consumption assembly 2 is arranged between the first installation seat 11 and the second installation seat 12, the first installation seat 11 is connected with the second installation seat 12 in a sliding mode, the first installation seat 11 is connected with a limiting part 3, the first installation seat 11 is connected with a movable component 5 through a connecting part 4, and the movable component 5 can drive the first installation seat 11 to move relative to the second installation seat 12 so that the yield type metal energy-consumption assembly 2 generates shear type dislocation. When the bridge is used, the movable member 5 is used for connecting a beam body, the second mounting seat 12 is used for connecting a bridge pier, or the movable member 5 is used for connecting a bridge pier, and the second mounting seat 12 is used for connecting a beam body.
Specifically, as shown in fig. 1-2, the first mounting seat 11 includes a transverse partition plate, the second mounting seat 12 includes a first frame member, the transverse partition plate is disposed in the first frame member, two ends of the transverse partition plate abut against an inner wall of the first frame member, so as to effectively avoid relative movement in an ineffective energy consumption direction, and effectively and sufficiently restrain the translational motion of the yielding metal energy consumption assembly perpendicular to the movement direction and the rotation of the yielding metal energy consumption assembly along the movement direction, and the moment of the limiting component 3, in cooperation with the moment of the yielding metal energy consumption assembly 2, can effectively restrain the rotation of the yielding metal energy consumption assembly 2 perpendicular to the movement direction, that is, prevent the rotation in the three-axis direction, and provide an ideal condition for sufficient energy consumption through shear type dislocation. A polytetrafluoroethylene plate is arranged between the contact surfaces of the diaphragm plate and the first frame member, so that the friction resistance is reduced, and the actual deviation of the design bearing capacity of the device is reduced. Both ends all are equipped with the pin that the cross-section is the round end type about the cross slab, first frame component both sides wall corresponding position is equipped with the spout, the tip shape adaptation of spout the cross sectional shape of pin, pin sliding connection in the spout is used for right displacement between first mount pad 11 and the second mount pad 12 carries on spacingly, the equal symmetry in both sides about the cross slab is equipped with yield type metal energy dissipation subassembly 2, 2 one end of yield type metal energy dissipation subassembly connect in cross slab, the other end connect in first frame component inner wall. The yield type metal energy dissipation assembly 2 is an energy dissipation component in the prior art, if the yield type metal energy dissipation assembly 2 comprises a plurality of shearing type metal energy dissipation pieces, webs of the shearing type metal energy dissipation pieces are arranged along the sliding direction of the limiting component 3, and compared with an existing beam type metal damper, the yield type metal energy dissipation assembly 2 has the advantages of being large in initial rigidity, high in material utilization rate, closer to ideal elastic-plastic property in hysteresis curve form and strong in energy dissipation capacity. The shearing type metal energy dissipation sheet is low in cost and beneficial to reducing the construction cost and the maintenance cost. The shear type metal energy dissipation sheet can be installed in an assembly mode, and replacement after an earthquake is facilitated. When the shear type metal energy dissipation sheet is designed, the energy dissipation capacity, the buckling resistance and the maximum deformation capacity of the shear type metal energy dissipation sheet can be optimally designed by changing the thickness change of the web along the height direction, the curve type of the edge of the web and the like, and after the type of the web is determined, the initial rigidity, the bearing capacity, the maximum deformation and the maximum energy dissipation capacity of the shear type metal damper can be designed according to the size of the web. In this embodiment, the shear-type metal energy dissipation pieces are transversely arranged in a plurality of rows along the transverse partition plate, each row includes three metal energy dissipation pieces, the shear-type metal energy dissipation pieces are connected with buckling-restrained clamping plates 71, and clamping plate stiffening ribs 72 are arranged on the outer sides of the buckling-restrained clamping plates 71, as shown in fig. 3, the web plates of the shear-type metal energy dissipation pieces are further prevented from buckling, the three shear-type metal energy dissipation pieces in the same row can be clamped by a group of buckling-restrained clamping plates 71 and locked by fastening bolts, and a polytetrafluoroethylene plate is also arranged between the shear-type metal energy dissipation pieces and the buckling-restrained clamping plates 71.
The shear type metal energy dissipation sheet can be replaced by the structure shown in fig. 4 and 5 in addition to the structure shown in fig. 1-2, and a transverse rib plate can be additionally arranged on the basis of the structure shown in fig. 5, for example, if a structure with 5 ribs like the structure shown in fig. 5 is adopted, the buckling-restrained clamp plate 71 is not required to be arranged.
The connecting part 4 comprises a connecting rod, one end of the connecting rod is connected to the middle part of the diaphragm plate, the upper and lower side walls of the connecting rod are provided with second stiffening ribs 62, the diaphragm plate is also correspondingly provided with reinforcing ribs, the other end of the connecting rod is provided with a sliding block 41, the movable member 5 comprises a limiting groove, the sliding block 41 is connected with the limiting groove in a sliding way, the limiting groove has a limiting function along the sliding direction of the limiting part 3, the other direction can not be limited, the outer side of the sliding groove is provided with a first stiffening rib 61, the limiting groove is arranged, and the sliding block and the limiting groove can have gaps at both sides of limiting, so that the sliding block can slide relative to the limiting groove and can also slide along the axial direction of the limiting groove when the bridge is in normal use stage and is deformed due to the arrangement mode, the beam body can realize bidirectional movement under the normal, meanwhile, the influence of the energy consumption component on the internal force of the bridge structure in the normal operation state is reduced.
The first mount 11 may also employ a frame member without considering the saving of the installation space.
The device is additionally provided with the yield type metal damper on the basis of the rigid beam falling prevention device, breaks through the limitation that the existing shear type dislocation energy consumption metal damper is difficult to meet the displacement requirement of the seismic isolation and reduction design of bridge engineering, effectively meets the deformation condition of the device, obviously increases the deformation capacity of the energy consumption beam falling prevention device, has a scientific and compact structure, effectively improves the energy consumption capacity of the device in the same installation space, is beneficial to reducing the cost of the device, prevents the premature failure of the yield type metal damper, ensures the effectiveness of continuous energy consumption, prolongs the service life of the device, protects the bridge structure from earthquake damage, and is beneficial to repairing after earthquake.
Example 2
The shear type energy consumption beam falling prevention device is substantially the same as that in embodiment 1, and is different from the shear type energy consumption beam falling prevention device in that the shear type energy consumption beam falling prevention device further comprises a third installation seat 13 as shown in fig. 6-7, wherein the third installation seat 13 comprises a second frame member, the second frame member is arranged on the outer layer of the first frame member, the width of the first frame member is matched with that of the second frame member, namely the left end and the right end of the first frame member are abutted to the inner wall of the second frame member, so that relative movement in an ineffective energy consumption direction is effectively avoided, and the interval between the height of the first frame member and the height of the second frame member is used for installing shear type metal energy consumption pieces, so that two layers of dampers are respectively located on the inner side surface and the outer side surface of the corresponding installation plate and are symmetrically arranged, and. The frame structure is characterized in that a polytetrafluoroethylene plate is arranged between contact surfaces of the first frame component and the second frame component, limiting parts 3 with the same structure are arranged at the left end and the right end of the first frame component, sliding grooves are formed in corresponding positions of two side walls of the second frame component, and the limiting parts 3 are connected to the sliding grooves in a sliding mode to enable the first frame component to slide relative to the second frame component. The sum of the yield bearing capacities of all the shear-type metal energy consumption pieces positioned on the inner layer is less than or equal to the yield bearing capacity of all the shear-type metal energy consumption pieces positioned on the outer layer, and the sum of the ultimate bearing capacities of all the shear-type metal energy consumption pieces positioned on the inner layer is greater than the sum of the yield bearing capacities of all the shear-type metal energy consumption pieces positioned on the outer layer.
And the second layer of frame nested structure further ensures that ideal deformation energy consumption conditions are provided for the yield type metal energy consumption assembly 2 of the second level, all metal energy consumption pieces in each layer are in a parallel system, the displacement of each metal energy consumption piece is equal, the first layer of metal energy consumption pieces and the second layer of metal energy consumption pieces are connected in series and deform according to rigidity distribution, the maximum deformation capacity of each layer of energy consumption pieces is superposed, when the deformation of the first layer reaches the designed maximum deformation, deformation is continuously transmitted to the second layer, and the deformation of the first layer is not continuously increased. By adopting the arrangement mode, the plastic deformation is mainly concentrated on the first layer during small earthquakes, namely, the fatigue life of the yielding type metal energy dissipation assembly arranged between the first mounting seat and the second mounting seat is only consumed, and when larger earthquakes occur, the rest layers can participate in the work in succession, so that the maximum deformation capacity of the device is effectively increased.
At the design verification stage, the multilayer damper of this application sets up the structure, and each power consumption piece of layer is according to parallelly connected, be convenient for carry out numerical simulation according to the series connection between each layer, and structural design is convenient, can also be convenient for assemble and field installation.
Example 3
The shear type energy-consumption beam-falling-prevention device is substantially the same as that in embodiment 2, but is different in that the shear type metal energy-consumption piece is replaced by a bending type metal energy-consumption piece, such as a double-curvature bending type metal energy-consumption piece, and as shown in fig. 8, a web of the double-curvature bending type metal energy-consumption piece is arranged along a direction perpendicular to a movement direction of the first mounting seat 11 relative to the second mounting seat 12. Compared with cantilever type bending metal dampers, the double-curvature bending metal damper has the advantages of higher initial rigidity, higher material utilization rate, fuller hysteresis curve form and higher energy consumption capacity under the condition of the same steel consumption. The design of the anti-seismic performance of the bending metal energy dissipation sheet is simple, key parameters such as yield point, limit deformation and the like can be designed by controlling parameters such as a shear-span ratio, a plate thickness and the like, for example, the curvature of two ends of the double-curvature bending metal damper is large, the middle part is a reverse bending point, the curvature is 0, and the width or the thickness of the two ends can be properly increased to increase the energy dissipation capacity of unit mass. The height of the energy dissipation sheet is about high, and the deformability is about large; as the thickness and width increase, the yield bearing capacity and energy consumption capacity increase.
The double-curvature bent metal energy dissipation sheet can be replaced by the structure shown in fig. 9 and 10.
Example 4
The shear-type energy-consumption beam-falling-prevention device is substantially the same as that in embodiment 2 or embodiment 3, and is different in that a fourth mounting seat and a fifth mounting seat … can be additionally arranged according to actual needs, the fourth mounting seat comprises a third frame member arranged on the outer layer of the second frame member, and a shear-type metal energy-consumption sheet or a double-curvature bent-type metal energy-consumption sheet is correspondingly arranged between the second frame member and the third frame member. The arrangement of the fifth mounting seat is analogized in sequence.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a shear type power consumption roof beam device that falls is prevented, its characterized in that contains first mount pad (11) and second mount pad (12), be equipped with bent type metal power consumption subassembly (2) between first mount pad (11) and second mount pad (12), first mount pad (11) and second mount pad (12) sliding connection, first mount pad (11) are connected with spacing part (3), first mount pad (11) are through adapting unit (4) connection movable component (5), movable component (5) can drive first mount pad (11) for second mount pad (12) motion and then make bent type metal power consumption subassembly (2) take place shear type diastrophism.
2. A shear type energy-consuming beam-falling prevention device according to claim 1, wherein the first mounting seat (11) comprises a diaphragm, the second mounting seat (12) comprises a first frame member, the diaphragm is arranged in the first frame member, the limiting parts (3) are arranged at both ends of the diaphragm, sliding grooves are arranged on both side walls of the first frame member, the limiting parts (3) are slidably connected to the sliding grooves, and one end of the yielding type metal energy-consuming assembly (2) is connected to the diaphragm, and the other end of the yielding type metal energy-consuming assembly is connected to the inner wall of the first frame member.
3. A shear-type energy-dissipating beam falling prevention device according to claim 2, wherein the yield-type metal energy-dissipating components (2) are provided on both sides of the diaphragm.
4. A shear type energy-consuming beam-falling prevention device according to claim 2, wherein the movable member (5) comprises a limiting groove, and a sliding block (41) is provided at an end of the connecting member (4), and the sliding block (41) is slidably connected with the limiting groove.
5. A shear-type energy-consuming beam falling prevention device according to claim 1, wherein the yield-type metal energy-consuming assembly (2) comprises a plurality of shear-type metal energy-consuming pieces, webs of the shear-type metal energy-consuming pieces are arranged along a moving direction of the first mounting seat (11) relative to the second mounting seat (12), the shear-type metal energy-consuming pieces are connected with buckling-prevention splints (71), and the buckling-prevention splints (71) comprise splinting stiffeners (72).
6. A shear-type energy-dissipating beam-falling prevention device according to claim 1, wherein the yield-type metal energy-dissipating assembly (2) comprises a plurality of double-curvature-type bending-type metal energy-dissipating pieces, and the webs of the double-curvature-type bending-type metal energy-dissipating pieces are arranged along a direction perpendicular to a moving direction of the first mounting seat (11) relative to the second mounting seat (12).
7. A shear-type energy-consumption beam-falling prevention device according to any one of claims 1-6, further comprising a third mounting seat (13), wherein the second mounting seat (12) and the third mounting seat (13) are slidably connected, a plurality of yielding-type metal energy-consumption components (2) are also arranged between the second mounting seat (12) and the third mounting seat (13), the second mounting seat (12) is connected with a limiting component (3), and the movable member (5) can drive the second mounting seat (12) to move relative to the third mounting seat (13) so as to enable the yielding-type metal energy-consumption components (2) between the second mounting seat (12) and the third mounting seat (13) to generate shear-type dislocation.
8. A shear-type energy dissipating beam falling prevention device according to claim 7, wherein the third mounting seat (13) comprises a second frame member disposed on an outer layer of the second mounting seat (12), and the yield metal energy dissipating assembly (2) between the first mounting seat (11) and the second mounting seat (12) is disposed opposite to the yield metal energy dissipating assembly (2) between the second mounting seat (12) and the third mounting seat (13).
9. A shear-type energy dissipating beam falling prevention device according to claim 7, wherein the yield bearing capacity of the yield metal energy dissipating assembly (2) between the first and second mounting seats (11, 12) is less than or equal to the yield bearing capacity of the yield metal energy dissipating assembly (2) between the second and third mounting seats (12, 13), and the ultimate bearing capacity of the yield metal energy dissipating assembly (2) between the first and second mounting seats (11, 12) is greater than the yield bearing capacity of the yield metal energy dissipating assembly (2) between the second and third mounting seats (12, 13).
10. A shear type energy dissipation beam falling prevention device according to claim 7, wherein a Teflon plate is arranged between the contact surfaces of the first mounting seat (11) and the second mounting seat (12), and a Teflon plate is also arranged between the contact surfaces of the second mounting seat (12) and the third mounting seat (13).
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| CN202010879516.3A CN111878538B (en) | 2020-08-27 | 2020-08-27 | Shear type energy-consumption beam falling prevention device |
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| CN202010879516.3A CN111878538B (en) | 2020-08-27 | 2020-08-27 | Shear type energy-consumption beam falling prevention device |
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