CN114717931A - Planar multidirectional energy dissipation and shock absorption device - Google Patents
Planar multidirectional energy dissipation and shock absorption device Download PDFInfo
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- CN114717931A CN114717931A CN202111274587.1A CN202111274587A CN114717931A CN 114717931 A CN114717931 A CN 114717931A CN 202111274587 A CN202111274587 A CN 202111274587A CN 114717931 A CN114717931 A CN 114717931A
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- chute
- shape memory
- memory alloy
- steel baffle
- sliding chute
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
Abstract
The invention provides a plane multidirectional energy dissipation and shock absorption device. The device is arranged in a bridge structure consisting of a main beam, a bent cap, a pier stud and a support, and comprises an upper chute, a steel baffle, a nut, a plurality of shape memory alloy rods, a lower chute and a pin shaft. The upper chute is hinged with the main beam through an upper pin hole by a pin shaft, and the lower chute is hinged with the bent cap through a lower pin hole. Two ends of the shape memory alloy rods are connected with the steel baffle through nuts, and the steel baffle is in contact with two ends of the sliding groove. The upper chute is clamped on the lower chute, and the upper chute and the lower chute can slide relatively. The invention takes plane rotation and translation of the curved beam body into consideration, adapts to the rotation of the curved beam through the pin shaft, resists the translation through the SMA rod, thereby playing the role of energy consumption and shock absorption, avoiding the curved beam body from falling down and other seismic damages under the action of strong shock, and dissipating seismic energy with energy consumption. In addition, the SMA rod has super-elasticity, so that the self-resetting of the structure after the earthquake can be realized, and meanwhile, the device has the advantages of simple structure, reliable function, economy and practicability.
Description
Technical Field
The invention belongs to the field of bridge engineering, and particularly relates to a planar multidirectional energy dissipation and shock absorption device.
Background
China is located at the boundary of the Pacific earthquake zone and the Himalayan earthquake zone, and in recent years, multiple destructive earthquakes occur, so that the bridge structure is seriously damaged, and the collapse of a pier column is caused. The curved beam body not only translates but also rotates in a plane in the earthquake, so that the existing damping device for the linear bridge is difficult to play a role.
Disclosure of Invention
In view of the above problems, the present invention provides a multidirectional energy dissipation and damping device suitable for curved bridges under strong seismic action, which has a Shape Memory Alloy (SMA) rod with superelasticity, so that the structure can realize self-resetting after seismic, and the device has a simple, economical and effective structure, and is easy to repair and replace after seismic.
The technical scheme adopted by the invention is as follows:
the utility model provides a multidirectional power consumption damping device in plane, sets up in the bridge structures who comprises girder (9), bent cap (10), pier stud (11) and support (12), its characterized in that, the device includes spout (1), steel baffle (3), nut (4), a plurality of shape memory alloy stick (5), gliding chute (6) and round pin axle (8).
The upper chute (1) is provided with an upper pin hole (2) and is hinged with the main beam (9) through the upper pin hole (2) by a pin shaft (8).
The lower chute (6) is provided with a lower pin hole (7) and is hinged with the bent cap (10) through the lower pin hole (7) by a pin shaft (8).
The diameters of the upper pin hole (2), the lower pin hole (7) and the pin shaft (8) can be designed according to the transmitted shear force value.
Go up spout (1) for the rectangle design of under shed, lower spout (6) have bellied rectangle design for upper shed and lower part, and both cooperate, form the inner space after the installation is pegged graft, wear in the fluting space of last spout (1) in lower spout (6), go up spout (1) card on lower spout (6), both slide along the spout direction relative.
The upper chute (1) and the lower chute (6) form a sliding main body of the device.
Steel baffles (3) are arranged on two sides of the shape memory alloy rod (5): a plurality of holes are formed in the steel baffle (3), a plurality of shape memory alloy rods (5) penetrate through the holes, and two ends of each shape memory alloy rod (5) are connected with the steel baffle (3) through nuts (4);
the shape memory alloy rod (5) and the steel baffle (3) form an energy consumption main body of the device.
The energy dissipation main body is arranged in the inner space of the sliding main body, and a steel baffle (3) in the energy dissipation main body is in stressed contact with the two ends of an upper sliding groove (1) and a lower sliding groove (6) in the sliding main body due to the tension of a shape memory alloy rod (5).
The planar multidirectional energy dissipation and shock absorption device can adopt shape memory alloy wires, rods and springs to provide rigidity along the direction of the sliding groove.
The plane multidirectional energy dissipation and shock absorption device can be applied to linear bridges, curved bridges and inclined bridges.
The planar multidirectional energy-dissipation and shock-absorption device has low requirements on vertical space, and can be used in large-span bridges such as curve cable-stayed bridges and medium-small-span bridges such as curve beam bridges.
The planar multidirectional energy-consuming and shock-absorbing device consumes energy through the shape memory alloy rod (5), the shape memory alloy rod has shape memory and superelasticity, and the elongation is high, so that a large displacement can be realized by adopting a short shape memory alloy rod; the whole horizontal rotation of the device is realized through the pin shaft (8), so that the curved beam bridge can rotate in a plane.
Therefore, the plane rotation and translation of the curved beam body are considered, the curved beam is adapted to rotate through the pin shaft (8), the translation of the curved beam body is resisted through the SMA rod, the energy dissipation and shock absorption effects are achieved, and the shock damages such as beam falling and the like of the curved beam body under the action of strong shock can be avoided.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can be applied to energy dissipation and shock absorption of linear bridges and is also suitable for curved bridges. The device is hinged with the upper and lower structures to realize plane rotation, so that the device can adapt to displacement of the beam body in any direction;
2. the shape memory alloy rod is adopted to limit the translational displacement of the beam body, so that not only can the seismic energy be dissipated, but also the self-resetting of the beam body after the earthquake can be realized;
3. the invention has wide application prospect. The horizontal multidirectional energy dissipation and shock absorption device can be suitable for various bridges, and is simple in structure, economical and practical.
Drawings
FIG. 1 is a three-dimensional structural representation of the present invention.
Figure 2 is a diagrammatic representation of an upper chute of the present invention.
Figure 3 is a schematic representation of a lower chute of the present invention.
Fig. 4 is a pin illustration of the present invention.
FIG. 5 is a schematic representation of the lower runner and SMA anchor of the present invention.
FIG. 6 is a schematic view of the anchoring of the shape memory alloy rod of the present invention.
FIG. 7 is a schematic diagram of the operation of the device of the present invention when the main beam and the capping beam of the bridge generate plane relative displacement in any direction under the action of strong shock.
Reference numbers in the figures: 1-an upper chute; 2, pin hole mounting; 3-a steel baffle plate; 4-a nut; 5-a shape memory alloy rod; 6-lower chute; 7-lower pin hole; 8-a pin shaft; 9-main beam; 10-a capping beam; 11-pier stud; 12-support.
Detailed Description
The technical solutions provided in the present application will be further described with reference to the following specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent in conjunction with the following description.
It should be noted that the embodiments of the present application have a better implementation and are not intended to limit the present application in any way. The technical features or combinations of technical features described in the embodiments of the present application should not be considered as being isolated, and they may be combined with each other to achieve a better technical effect. The scope of the preferred embodiments of this application may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The drawings in the present application are in simplified form and are not to scale, but rather are provided for convenience and clarity in describing the embodiments of the present application and are not intended to limit the scope of the application. Any modification, change in the ratio or adjustment of the size of the structure should fall within the scope of the technical disclosure of the present application without affecting the effect and the purpose of the present application. And the same reference numbers appearing in the various drawings of the present application designate the same features or components, which may be employed in different embodiments. In order that the technical spirit and advantages of the present invention may be more clearly understood, applicant shall now make a detailed description, by way of example, with reference to the accompanying drawings.
Example 1:
in the scenario shown in fig. 1, the planar multidirectional energy-consuming and shock-absorbing device is disposed in a bridge structure composed of a main beam 9, a bent cap 10, a pier 11 and a support 12;
specifically, referring to the structure shown in fig. 1, 2, 3, 4, 5 and 6, the device comprises an upper chute 1, a steel baffle 3, a nut 4, a plurality of shape memory alloy rods 5, a lower chute 6 and a pin shaft 8.
Go up spout 1 for slotted rectangle design down, lower spout 6 has bellied rectangle design for upper shed and lower part, and both cooperate, form inner space after the installation is pegged graft, promptly: lower spout 6 adaptation is in the fluting space of last spout 1, goes up spout 1 card on lower spout 6, and both can follow the spout direction relative slip after the interlock.
The upper chute 1 and the lower chute 6 constitute a sliding body of the device.
The steel baffle 3 is arranged on two sides of the shape memory alloy rod 5: a plurality of holes are formed in the steel baffle 3, a plurality of shape memory alloy rods 5 penetrate through the holes, and two ends of each shape memory alloy rod 5 are connected with the steel baffle 3 through nuts 4.
The shape memory alloy rod 5 and the steel baffle 3 form an energy consumption main body of the device, the energy consumption main body is arranged in the inner space of the sliding main body, and the steel baffle 3 in the energy consumption main body is in stressed contact with the two ends of the upper sliding groove 1 and the lower sliding groove 6 in the sliding main body due to the tension of the shape memory alloy rod 5.
When the installation is fixed, the device of the invention:
the upper chute 1 is provided with an upper pin hole 2, and is hinged with a main beam 9 at the upper part of the device through the upper pin hole 2 and a pin shaft 8, and the pin hole is arranged as a hinge point B.
The lower chute 6 is provided with a lower pin hole 7, and is hinged with a cover beam 10 at the lower part of the device through the lower pin hole 7 and a pin shaft 8, and the hinge point A is set.
In specific engineering applications, the diameters of the upper pin hole 2, the lower pin hole 7 and the pin shaft 8 can be designed according to the transmitted shear force value.
When strong shock occurs, the working principle of the device is as follows:
under the action of strong shock, because two hinge points AB exist in the plane, when the main beam 9 and the bent cap 10 of the bridge generate relative displacement in any direction in the plane, in order to adapt to the displacement, the upper chute 1 and the main beam 9, and the two upper and lower pin shafts 8 corresponding to the lower chute 6 and the bent cap 10 also rotate relatively. And the upper chute 1 starts to translate along the lower chute 6 to push the steel baffle 3 in the advancing direction to move together, and at the moment, the shape memory alloy rod 5 starts to synchronously extend and is in a pulled state to play the energy consumption limiting role.
Fig. 7 shows the device of the invention at two hinge points AB in plane. When a strong shock occurs, the main beam 9 and the cover beam 10 rotate around the center of a certain point O and translate along the radius direction of OB, after relative rotation and translation occur in a plane, the hinge point B moves to a point B', and the elongation of the energy consumption main body in the device is delta l.
The device disclosed by the invention realizes the integral horizontal rotation of the device through the pin shaft, and consumes energy through the Shape Memory Alloy (SMA) rod, wherein the SMA has shape memory and superelasticity and higher elongation, so that a larger displacement can be realized by adopting a shorter SMA rod, and the energy-consuming and shock-absorbing effects are realized. In addition, the SMA rod adopted by the device has superelasticity, so that the self-resetting of the structure after the earthquake can be realized, and meanwhile, the device has the advantages of simple structure, reliable function, economy and practicability.
Furthermore, the planar multidirectional energy-consuming and shock-absorbing device can be applied to linear bridges, curved bridges and inclined bridges.
Furthermore, the planar multidirectional energy dissipation and shock absorption device can adopt shape memory alloy wires, rods and springs to provide rigidity along the direction of the sliding groove.
The above description of the embodiments is not intended to limit the present invention, and therefore, the scope of the present invention is not limited to the above embodiments, and any modifications and improvements made according to the present invention are considered to fall within the scope of the present invention, which is merely formal and insubstantial.
Claims (3)
1. A plane multidirectional energy dissipation and shock absorption device is arranged in a bridge structure consisting of a main beam (9), a bent cap (10), pier columns (11) and a support (12), and is characterized by comprising an upper chute (1), a steel baffle (3), nuts (4), a plurality of shape memory alloy rods (5), a lower chute (6) and a pin shaft (8);
the upper chute (1) is provided with an upper pin hole (2) and is hinged with the main beam (9) through the upper pin hole (2) by a pin shaft (8);
the lower chute (6) is provided with a lower pin hole (7) and is connected with the bent cap (10) through the lower pin hole (7) by a pin shaft (8);
the upper sliding chute (1) is in a rectangular design with a lower opening, the lower sliding chute (6) is in a rectangular design with an upper opening and a bulge at the lower part, the upper sliding chute and the lower sliding chute are matched, an inner space is formed after installation and insertion, the lower sliding chute (6) penetrates through a slotted space of the upper sliding chute (1), the upper sliding chute (1) is clamped on the lower sliding chute (6), and the upper sliding chute and the lower sliding chute slide relatively along the sliding chute direction;
the upper chute (1) and the lower chute (6) form a sliding main body of the device;
steel baffles (3) are arranged on two sides of the shape memory alloy rod (5): a plurality of holes are formed in the steel baffle (3), a plurality of shape memory alloy rods (5) penetrate through the holes, and two ends of each shape memory alloy rod (5) are connected with the steel baffle (3) through nuts (4);
the shape memory alloy rod (5) and the steel baffle (3) form an energy consumption main body of the device;
the energy dissipation main body is arranged in the inner space of the sliding main body, and a steel baffle (3) in the energy dissipation main body is in stressed contact with the two ends of an upper sliding groove (1) and a lower sliding groove (6) in the sliding main body due to the tension of a shape memory alloy rod (5).
2. The planar multidirectional energy-consuming and shock-absorbing device as recited in claim 1, wherein the planar multidirectional energy-consuming and shock-absorbing device is applied to a linear bridge, a curved bridge and a skew bridge.
3. The planar multidirectional energy-consuming and shock-absorbing device as recited in claim 1, wherein rigidity is provided along the sliding groove by using shape memory alloy wires, rods and springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111274587.1A CN114717931B (en) | 2021-10-29 | 2021-10-29 | Plane multidirectional energy dissipation and shock absorption device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111274587.1A CN114717931B (en) | 2021-10-29 | 2021-10-29 | Plane multidirectional energy dissipation and shock absorption device |
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| Publication Number | Publication Date |
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| CN114717931A true CN114717931A (en) | 2022-07-08 |
| CN114717931B CN114717931B (en) | 2023-06-09 |
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2021
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