A new type of shock-absorbing energy-absorbing support

Abstract

The present invention relates to a new type of shock-absorbing and energy-absorbing support, including a connecting sleeve, a one-way gear and a supporting rod, wherein one side of the connecting sleeve is open, and the one-way gear is arranged in two rows at intervals in the connecting sleeve, and the supporting rod extends between the two rows of one-way gears and is meshed and connected with the one-way gears, and the rotation direction of the one-way gear satisfies: the supporting rod can only move into the connecting sleeve. Compared with the prior art, the present invention utilizes the travel range of the supporting rod connecting section inside the connecting sleeve and the yield displacement range of the supporting rod energy-absorbing section to adapt to various forces and deformations under constant loads, live loads, and earthquake loads, and has a clear and reliable force path, a simple structure, and is easy to install, use, and maintain; the one-way rotation characteristics of the one-way gear are utilized to realize the characteristic that the support is only subjected to tension, effectively preventing the compressive buckling of the support under the action of an earthquake, and stably and effectively playing a shock-absorbing and energy-absorbing role during an earthquake.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge structure earthquake resistance and relates to a novel shock-absorbing and energy-absorbing support. Background Art

[0002] In seismic design, structures usually undergo inelastic deformations under strong earthquakes. In this case, part of the seismic energy is dissipated through the hysteresis characteristics of the structural components, which enable the structure to resist the horizontal loads under earthquakes. The purpose of ductile design is to ensure that structural components, especially those that bear the main loads, can adapt to these inelastic deformations and the stability of the structure is not destroyed. However, even for the most ductile components, permanent system deformation and damage after an earthquake make post-earthquake repairs costly or even impossible. Therefore, earthquake damage can be concentrated in a certain part of the structure, and only that part needs to be repaired or replaced after the earthquake. This concept is called the structural "fuse" concept.

[0003] This method states that the structure should have two independent components, one of which is a frame structure that only resists gravity loads. The other is a passive energy-absorbing element system designed to resist loads caused by strong ground movements. At present, buckling-restrained braces (BRBs) are mainly used as bridge structure "fuse". Replaceable BRBs are designed in the pier frame to increase the strength and stiffness of the pier frame system, and the BRBs consume seismic energy while the pier itself remains elastic.

[0004] Since the BRB is subjected to repeated axial tensile pressure during an earthquake, in order to prevent local buckling, it is necessary to cover the core section with a concrete layer to increase the cross-sectional area. When the pier height increases, the length of the BRB increases accordingly. The mass of the covering layer concrete is large, the additional force generated cannot be ignored, and the problem of overall instability cannot be avoided. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of shock-absorbing and energy-absorbing support in order to overcome the defects of the above-mentioned prior art. The travel range of the support rod connecting section inside the connecting sleeve and the yield displacement range of the support rod energy-absorbing section are utilized to adapt to the forces and deformations under various constant loads, live loads, and earthquake loads. The force path is clear and reliable, the structure is simple, and it is easy to install, use, and maintain. The one-way rotation characteristics of the one-way gear are utilized to realize the characteristic that the support is only subjected to tension, effectively preventing the support from compressive buckling under the action of an earthquake, and stably and effectively playing the role of shock absorption and energy dissipation during an earthquake.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A novel shock-absorbing and energy-absorbing support comprises a connecting sleeve, a one-way gear and a supporting rod, wherein one side of the connecting sleeve is open, the one-way gear is arranged in two rows at intervals in the connecting sleeve, the supporting rod extends between the two rows of one-way gears and is meshed and connected with the one-way gears, and the rotation direction of the one-way gear satisfies: the supporting rod can only move into the connecting sleeve.

[0008] Furthermore, the ends of the connecting sleeve and the supporting rod are both provided with circular holes that can be hinged to the bridge structure.

[0009] Furthermore, the hinged object of the connecting sleeve is the cap beam or the top of the pier in the bridge structure.

[0010] Furthermore, the hinged object of the support rod is a cap in the bridge structure.

[0011] Furthermore, the support rod comprises an anchoring section, an energy-absorbing section and a connecting section which are connected in sequence and form an integral whole, wherein the anchoring section is used to connect to an external bridge structure, and the connecting section is processed with a notch which meshes with a one-way gear.

[0012] Furthermore, the cross-sectional dimensions of the energy dissipation section and the anchoring section transition smoothly, thereby avoiding stress concentration at the cross-sectional change point that may lead to damage to the rod.

[0013] Furthermore, the cross-sectional area of ​​the connecting section is not less than twice the cross-sectional area of ​​the energy-consuming section, so as to avoid yielding of the connecting section.

[0014] Furthermore, the connecting sleeve, the one-way gear and the supporting rod are all made of steel.

[0015] Furthermore, the internal cavity of the connecting sleeve is divided into a buffer cavity near its end and a gear installation cavity near its opening side, the buffer cavity is connected to the gear installation cavity, and the one-way gear is arranged in the gear installation cavity.

[0016] In the restoring force-deformation curve of the present invention, when the deformation is positive, the restoring force is proportional to the deformation (the ratio is the pre-bend stiffness) until a yield force is reached. After that, when the deformation continues to increase, the restoring force hardly changes. However, when the positive deformation is restored, the restoring force is unloaded according to the pre-bend stiffness until the restoring force is zero. When the deformation is negative, the restoring force remains zero. However, when the negative deformation begins to recover, the restoring force increases in proportion to the pre-bend stiffness.

[0017] The working principle of the present invention is as follows: when the connecting sleeve and the supporting rod are subjected to tension, the one-way gear does not rotate, the energy-consuming section of the supporting rod first undergoes elastic deformation and then enters a yielding state, and the restoring force remains almost unchanged. When the connecting sleeve and the supporting rod are subjected to pressure, the one-way gear rotates, and the supporting rod moves axially toward the inside of the connecting sleeve without deformation, and cannot form a restoring force when under pressure.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1) The structure is simple, which is convenient for the construction and installation of most bridge structures, with low installation difficulty and little impact on construction;

[0020] 2) The shock-absorbing and energy-absorbing support adopts a one-way gear structure to realize the mechanical behavior of only tension, ensuring that the shock-absorbing and energy-absorbing device will not produce component buckling due to excessive pressure under the action of an earthquake, and ensuring the stable working performance of the shock-absorbing and energy-absorbing device;

[0021] 3) As a shock-absorbing and energy-absorbing component for bridge structure earthquake resistance, the shock-absorbing and energy-absorbing support can be used for earthquake-resistant reinforcement of built bridges or as a part of earthquake-resistant design of unbuilt bridges. The shock-absorbing and energy-absorbing support utilizes the travel range of the support rod connection section inside the connection sleeve and the yield displacement range of the support rod energy-absorbing section to adapt to the deformation of the frame structure formed by the cap beam and the pier of the bridge structure under the action of dead load, live load or earthquake force;

[0022] 4) The shock-absorbing energy-absorbing support is mainly subjected to axial tensile loads during use, and the transmission path is the bridge superstructure-support rod-connecting sleeve-foundation. The steel material used can effectively ensure that the shock-absorbing energy-absorbing support can withstand the designed axial tensile loads during operation and can also adapt to repeated fatigue loads;

[0023] 5) The hinged connection at both ends of the shock-absorbing energy-absorbing support greatly facilitates the connection with the bridge structure. After the earthquake, if repair or replacement is required, the disassembly work is also very convenient;

[0024] 6) The shock-absorbing energy-absorbing support has a clear force-bearing mode and a clear force-transmission path, so the damage to the structure is minimal and the structure is durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of the new shock-absorbing and energy-absorbing support;

[0026] Figure 2 It is a schematic diagram of the external structure of the new shock-absorbing and energy-absorbing support;

[0027] Figure 3 It is a schematic diagram of the application of the present invention in the lateral earthquake resistance of a double-column pier;

[0028] Figure 4 for Figure 3 An enlarged schematic diagram of the hinged position between the middle shock-absorbing energy-absorbing support and the cap;

[0029] Description of the markings in the figure:

[0030] 1-connecting sleeve, 2-one-way gear, 3-anchoring section, 4-energy dissipation section, 5-connecting section, 6-capping platform, 7-pier, 8-cap beam, 9-articulated base, 10-gear installation cavity, 11-buffer cavity. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0032] The present invention proposes a new type of shock-absorbing energy-dissipating support, the structure of which is shown in Figure 1 and Figure 2 As shown, it includes a connecting sleeve 1, a one-way gear 2 and a supporting rod, wherein one side of the connecting sleeve 1 is open, and the one-way gear 2 is arranged in two rows at intervals in the connecting sleeve 1, and the supporting rod extends between the two rows of one-way gears 2 and is meshed and connected with the one-way gears 2, and the rotation direction of the one-way gear 2 satisfies: the supporting rod can only move into the connecting sleeve 1.

[0033] In a specific embodiment of the present invention, please refer to Figure 1 As shown, the ends of the connecting sleeve 1 and the supporting rod are both provided with round holes that can be hinged to the bridge structure.

[0034] In a more specific embodiment, the hinged object of the connecting sleeve 1 is the cap beam 8 or the top of the pier 7 in the bridge structure.

[0035] In a more specific embodiment, the hinged object of the support rod is the cap 6 in the bridge structure.

[0036] In a specific embodiment of the present invention, please refer to Figure 1 As shown, the support rod comprises an anchoring section 3, an energy-absorbing section 4 and a connecting section 5 which are connected in sequence and form an integral whole, wherein the anchoring section 3 is used to connect to an external bridge structure, and the connecting section 5 is processed with a notch which meshes with the one-way gear 2.

[0037] In a more specific embodiment, the cross-sectional dimensions of the energy dissipation section 4 and the anchoring section 3 transition smoothly, thereby avoiding stress concentration at the cross-sectional change point that may lead to damage to the rod.

[0038] In a more specific embodiment, the cross-sectional area of ​​the connecting section 5 is not less than twice the cross-sectional area of ​​the energy dissipation section 4 to avoid yielding of the connecting section 5 .

[0039] In a specific implementation of the present invention, the connecting sleeve 1, the one-way gear 2, and the supporting rod are all made of steel.

[0040] In a specific embodiment of the present invention, please refer to Figure 1 As shown, the internal cavity of the connecting sleeve 1 is divided into a buffer cavity 11 near its end and a gear installation cavity 10 near its opening side, and the buffer cavity 11 is connected to the gear installation cavity 10, and the one-way gear 2 is arranged in the gear installation cavity 10. The setting of the buffer cavity 11 can reserve enough space for the support rod to extend into the interior of the connecting sleeve 1.

[0041] The above embodiments may be implemented individually or in any combination of two or more.

[0042] The above implementation is described in more detail below in conjunction with specific examples.

[0043] Embodiment 1:

[0044] like Figure 1 and Figure 2 As shown, this embodiment provides a new type of shock-absorbing energy-absorbing support, including a connecting sleeve 1, a one-way gear 2, an anchoring section 3, an energy-absorbing section 4, and a connecting section 5. The components have the following connection relationship: the anchoring section 3, the energy-absorbing section 4, and the connecting section 5 are an integrated structure and constitute a supporting rod, and the two rows of one-way gears 2 in the connecting sleeve 1 are connected to the connecting section 5.

[0045] The support rod is made of Q235 steel. A circular hole for hinge is left at the end of the anchor section 3 of the support rod for connecting the bridge structure. The cross-sectional area and length of the energy dissipation section 4 are determined by the design yield force and the design yield displacement respectively. The connecting sleeve 1 and the one-way gear 2 can ensure that the support rod only moves and deforms axially during an earthquake. The number and model of the one-way gear 2 are determined by the maximum axial force of the support rod under the design earthquake load, and it is required that the one-way gear 2 will not be damaged when the support rod yields axially.

[0046] Articulated bases 9 (such as Figure 3 and Figure 4 When the new shock-absorbing and energy-absorbing support is used for lateral earthquake resistance, the hinged base 9 is placed on the inner side of the connection between the cap beam 8 and the pier 7, or on the inner side of the connection between the pier 7 and the cap 6 (as shown in FIG. Figure 3As shown). When there is no cap beam 8, the placement position of the articulated base 9 can be selected according to the actual situation. The articulated device can be selected from mature articulated devices on the market. When selecting, attention should be paid to the applicable bearing capacity range to avoid damage to the articulated connection, which may cause the shock-absorbing energy-absorbing support to fail. Therefore, when installing the articulated base 9, it is necessary to bury the base to a certain depth corresponding to the bridge structure to ensure the reliability of the connection.

[0047] Figure 3 The figure shows the application of the new shock-absorbing energy-absorbing support in the lateral earthquake resistance of the double-column pier. The application scope of the new shock-absorbing energy-absorbing support is not limited to this. It has good applicability to single-column piers, double-column piers, frame piers, and whether there is a cap beam 9. Specifically, the hinged connection feature of the new shock-absorbing energy-absorbing support at both ends allows it to be easily connected to the bridge structure.

[0048] When the shock-absorbing energy-absorbing support receives a tensile force, the one-way gear 2 does not rotate, which plays a role in limiting the movement of the support. The energy-absorbing section 3 deforms under the action of the axial force. When the axial force reaches its yield point, the energy-absorbing section 3 undergoes plastic deformation, which plays a role in consuming earthquake energy. When the support rod is subjected to pressure, it pushes the one-way gear 2 to rotate, and the support rod moves approximately in a rigid body motion along the axial direction, and cannot form a restoring force when under pressure.

[0049] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A new type of shock-absorbing energy-absorbing support, characterized in that: It comprises a connecting sleeve, a one-way gear and a supporting rod, wherein one side of the connecting sleeve is open, two rows of one-way gears are arranged in the connecting sleeve at intervals, the supporting rod extends between the two rows of one-way gears and is meshed and connected with the one-way gears, and the rotation direction of the one-way gears satisfies: the supporting rod can only move into the connecting sleeve; The ends of the connecting sleeve and the supporting rod are both provided with circular holes that can be hinged to the bridge structure; The support rod comprises an anchoring section, an energy dissipation section and a connecting section which are connected in sequence and form an integral whole, wherein the anchoring section is used to connect to an external bridge structure, and the connecting section is processed with a notch which meshes with a one-way gear; The cross-sectional dimensions of the energy dissipation section and the anchoring section are smoothly transitioned; The cross-sectional area of ​​the connecting section is not less than twice the cross-sectional area of ​​the energy-consuming section; The inner cavity of the connecting sleeve is divided into a buffer cavity near its end and a gear installation cavity near its opening side. The buffer cavity is communicated with the gear installation cavity, and the one-way gear is arranged in the gear installation cavity.

2. A novel shock-absorbing and energy-absorbing support according to claim 1, characterized in that: The hinged object of the connecting sleeve is the cap beam or the top of the pier in the bridge structure.

3. A novel shock-absorbing and energy-absorbing support according to claim 1, characterized in that: The hinged object of the support rod is the cap in the bridge structure.

4. A novel shock-absorbing and energy-absorbing support according to claim 1, characterized in that: The connecting sleeve, one-way gear and supporting rod are all made of steel.

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