CN113186810A - Connecting hinge suitable for prefabricated assembled bridge pier - Google Patents
Connecting hinge suitable for prefabricated assembled bridge pier Download PDFInfo
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- CN113186810A CN113186810A CN202110447736.3A CN202110447736A CN113186810A CN 113186810 A CN113186810 A CN 113186810A CN 202110447736 A CN202110447736 A CN 202110447736A CN 113186810 A CN113186810 A CN 113186810A
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- pier
- plate
- hinge
- spherical
- disc
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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
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- 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
- E01D19/005—Piers, trestles, bearings, expansion joints or parapets specially adapted for portable or sectional bridges
Abstract
The invention relates to a connecting hinge suitable for a prefabricated assembled pier, which comprises an upper disc, a lower disc, prestressed ribs and buckling restrained braces, wherein the upper disc is arranged at the bottom of a pier stud, the lower disc is fixed on a bearing platform, the middle areas of the upper disc and the lower disc are in spherical contact fit and form a spherical hinge structure, and the buckling restrained braces are arranged between the upper disc and the lower disc and are positioned around the spherical hinge structure. Compared with the prior art, the invention can avoid the local damage of the bottom of the pier stud caused by the collision impact force when the traditional swinging pier swings through the rotation of the spherical hinge, the provided connecting hinge can be assembled with the prefabricated pier in a factory, the prestressed tendon is well stretched, the bolt connection is only needed to be carried out on the bottom plate of the connecting hinge and the bearing platform on site, the procedures of site stretching of the prestressed tendon and the like in the construction process of the traditional prefabricated pier are saved, and the invention has great convenience and time benefit. After the earthquake, only the buckling restrained brace needs to be replaced, so that the rapid recovery is facilitated.
Description
Technical Field
The invention belongs to the technical field of bridge engineering and seismic engineering, and relates to a connecting hinge suitable for a prefabricated assembled pier.
Background
The conventional ductile earthquake-resistant design method allows a plastic hinge to be formed at the bottom of a pier and consumes energy through the plastic hinge. Although the method prevents the collapse of the bridge, large residual deformation is generated after the earthquake, so that normal traffic cannot be recovered after the earthquake. Therefore, the method brings about social economy comprising the following steps: after earthquake, disaster relief is blocked, piers are forcedly dismantled, and commercial economy is limited, so that huge economic loss is caused. In order to restore the service function of the bridge after an earthquake, more and more scholars are beginning to research the bridge having the restorable function.
The swinging pier has excellent anti-seismic performance and post-seismic recovery capability, and is very suitable for application of a prefabricated assembly technology. However, during the rocking process, the local pressure at the rocking interface may cause the pier concrete at the point of rotation to peel and crush. At present, how to avoid local damage of the swing pier is a great research difficulty.
Most of the swinging piers are prefabricated and connected with adjacent components through unbonded post-tensioned prestressed tendons. Although the construction of the bridge is accelerated by the prefabrication and assembly, a series of works such as tensioning of the prestressed tendons and the like are still carried out on site, so that the prestressed tendons are difficult to tension and time-consuming, and the anchoring quality is difficult to check.
Disclosure of Invention
The invention aims to provide a connecting hinge suitable for a prefabricated and assembled pier so as to be suitable for quick connection between the pier and a bearing platform and reduce local damage and the like caused by swinging and collision at the bottom of the pier column.
The purpose of the invention can be realized by the following technical scheme:
a connecting hinge suitable for a prefabricated assembly pier comprises an upper disc, a lower disc, prestressed tendons and buckling restrained braces, wherein the upper disc is arranged at the bottom of a pier stud, the lower disc is fixed on a bearing platform, and the middle areas of the upper disc and the lower disc are in spherical contact fit and form a spherical hinge structure; the prestressed tendons can adopt unbonded prestressed tendons, one end of each prestressed tendon is anchored at the top of the pier stud, and the other end of each prestressed tendon is anchored on the bottom plate of the lower disc; the buckling restrained brace is arranged between the upper disc and the lower disc and is positioned around the spherical hinge structure.
Further, the hanging wall include the roof of anchor in pier stud bottom to and set up the ball pivot at the roof lower surface, the lower wall including fixing the bottom plate on the cushion cap, and set up the ball hinge nest on the bottom plate upper surface, ball pivot and ball hinge nest be the spherical contact and form the ball hinge structure.
Furthermore, the corner position of the spherical hinge socket, which is transited from the spherical inner wall to the platform section, is provided with a chamfer.
Furthermore, the spherical hinge is positioned at the central position of the top plate, the spherical hinge socket is positioned at the central position of the bottom plate, and the spherical hinge is matched with the spherical hinge socket in size.
Furthermore, the edge position of the upper disc is also provided with an upper baffle plate extending downwards, the edge position of the lower disc is also provided with a lower baffle plate extending upwards, the upper baffle plate is opposite to the lower baffle plate, and a space is reserved between the upper baffle plate and the lower baffle plate.
Furthermore, the upper baffle and the lower baffle are respectively arranged in a central symmetry manner.
Further, the upper disc is anchored at the bottom of the pier column through a shear nail.
Further, the lower disc is fixed on the bearing platform through anchor bolts.
Furthermore, both ends of the buckling restrained brace are respectively and fixedly connected with the upper disc and the lower disc, the upper end of the prestressed tendon is anchored at the top of the pier stud, and the lower end of the prestressed tendon sequentially penetrates through the pier stud and the top plate and is anchored on the bottom plate.
Furthermore, the upper end and the lower end of the buckling restrained brace are respectively welded on the upper disc and the lower disc.
Compared with the prior art, the invention has the following advantages:
(1) the invention provides a connecting hinge concept suitable for connecting a pier and a bearing platform for the first time. The connecting hinge is made of steel, the structure period is prolonged, the earthquake response is reduced through the rotation of the spherical hinge, and the local damage to the bottom of the pier column caused by the collision impact force generated when the traditional swinging pier swings can be avoided; in addition, the connecting hinge can replace a plastic hinge of a traditional ductile pier, and can effectively reduce the damage to the bottom of the pier column.
(2) The connecting hinge provided by the invention can be assembled with a prefabricated pier in a factory, the prestressed tendon is well tensioned, and only the bottom plate of the connecting hinge needs to be connected with the bearing platform through the bolt on site, so that the procedures of site tensioning procedures and the like of the prestressed tendon in the traditional prefabricated pier construction process are omitted, the site installation difficulty and the consumed time are greatly reduced, and the great convenience and the time benefit are realized.
(3) The connecting hinge has recoverability, the prestressed tendon provides self-resetting capability, and the buckling restrained brace only needs to be replaced after the earthquake, so that the rapid recovery and normal work of the pier stud after the earthquake are guaranteed.
Drawings
FIG. 1 is a schematic elevational view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic plan sectional view of FIG. 1;
FIG. 4 is a schematic diagram of the motion of a joint hinge in an earthquake;
the labels in the figure are:
the device comprises a pier stud 1, a shear nail 2, an upper plate 3, a lower plate 4, a buckling restrained brace 5, a prestressed tendon 6, an anchoring bolt 7, a bearing platform 8, a top plate 9, a spherical hinge head 10, an upper baffle 11, a spherical hinge socket 12, a bottom plate 13 and a lower baffle 14.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
In the following embodiments or examples, functional components or structures that are not specifically described are all conventional components or structures used in the art to achieve the corresponding functions.
The invention provides a connecting hinge suitable for a prefabricated and assembled pier, which is suitable for quick connection of a prefabricated and assembled pier and a bearing platform, and structurally comprises an upper disc 3, a lower disc 4, a buckling restrained brace 5 and a prestressed tendon 6, wherein the upper disc 3 is arranged at the bottom of the pier 1, the lower disc 4 is fixed on the bearing platform 8, the middle areas of the upper disc 3 and the lower disc 4 are in spherical contact fit and form a spherical hinge structure, the buckling restrained brace 5 is arranged between the upper disc 3 and the lower disc 4 and is positioned around the spherical hinge structure, one end of the prestressed tendon 6 is anchored at the top of the pier 1, and the other end of the prestressed tendon is anchored on the lower disc 4.
In some embodiments, referring to fig. 1 and the like, the upper plate 3 includes a top plate 9 anchored to the bottom of the pier stud 1, and a ball joint 10 disposed on the lower surface of the top plate 9, the lower plate 4 includes a bottom plate 13 fixed to the bearing platform 8, and a ball socket 12 disposed on the upper surface of the bottom plate 13, and the ball joint 10 and the ball socket 12 are in spherical contact to form the ball joint structure. Specifically, the ball joint 10 and the ball socket 12 are nested with each other, so that the lateral displacement of the upper disc 3 is restricted; meanwhile, the spherical hinge 10 is supported on the spherical hinge socket 12, and the spherical hinge 10 bears vertical load and can rotate relative to the spherical hinge socket 12.
Optionally, the distance between the top plate 9 of the upper plate 3 and the spherical hinge 12 of the lower plate 4 should be greater than the vertical displacement of the top plate 9 when the top plate 9 rotates to the maximum design rotation angle.
In a more specific embodiment, the corner position of the spherical socket 12 that is transited from the spherical inner wall to the platform section is provided with a chamfer.
In a more specific embodiment, the ball joint 10 is located at the central position of the top plate 9, the end part of the ball joint is in a hemisphere shape, the ball socket 12 is located at the central position of the bottom plate 13, and the size of the ball joint 10 is matched with that of the ball socket 12.
In some embodiments, please refer to fig. 1 and the like again, two ends of the buckling restrained brace 5 are respectively and fixedly connected to the upper plate 3 and the lower plate 4, the upper end of the tendon 6 is anchored at the top of the pier stud 1, and the lower end of the tendon 6 sequentially passes through the pier stud 1 and the top plate 9 and is anchored on the bottom plate 13. Specifically, the buckling restrained brace 5 dissipates energy through plastic deformation of the buckling restrained brace (core material), has high ductility and hysteresis energy dissipation capacity, has double functions of a common brace and an energy dissipation component, and can be replaced after an earthquake. Based on the principle of capability protection, the connection strength of the buckling restrained brace 5 with the upper disc 3 and the lower disc 4, and the anchoring strength between the lower disc 4 and the bearing platform 8 are all larger than the maximum earthquake force requirement. While unbonded tendons can be used for the tendons 6.
In a more specific embodiment, the upper and lower ends of the buckling-restrained brace 5 are welded to the upper plate 3 and the lower plate 4, respectively.
In some embodiments, please refer to fig. 1 and the like again, an upper baffle 11 extending downward is further disposed at an edge position of the upper tray 3, a lower baffle 14 extending upward is further disposed at an edge position of the lower tray 4, the upper baffle 11 is opposite to the lower baffle 14, and a space is reserved between the upper baffle 11 and the lower baffle 14. The distance between the upper baffle 11 and the lower baffle 14 is determined according to the vertical displacement of the upper baffle 11 at the maximum design rotation angle.
In a more specific embodiment, the upper baffle 11 and the lower baffle 14 are respectively arranged in a central symmetry manner.
In some embodiments, the upper plate 3 is anchored at the bottom of the pier stud 1 through the shear pins 2, and since the upper plate 3 needs to transmit a large load from the pier stud 1, based on the principle of capacity protection, enough shear pins 2 need to be provided to ensure the anchoring performance between the upper plate 3 and the pier stud 1.
In some embodiments, the lower disk 4 is secured to the bearing platform 8 by anchor bolts 7.
Under normal use conditions, the ball joint 10 of the upper disc 3 bears the vertical load. The spherical hinge socket 12 of the lower disc 4 can limit the transverse displacement of the spherical hinge head 10 of the upper disc 3, and the anti-shearing function is achieved. Meanwhile, the buckling restrained brace 5 and the prestressed tendons 6 limit the relative rotation between the upper and lower discs 4.
Under the action of an earthquake, the spherical hinge head 10 and the spherical hinge socket 12 rotate relatively to prolong the structural period, the buckling restrained brace 5 dissipates energy, and the prestressed tendons 6 are in an elastic state and provide restoring force so as to achieve the function of self-resetting. In order that the ball joint 10 of the upper disc 3 does not collide with the corner of the ball socket 12 that transitions from the spherical inner wall to the plateau section during rocking, the corner should be chamfered. In order to prevent the rotation angle of the connecting hinge under the action of large vibration from exceeding the design limit value, an upper baffle plate 11 and a lower baffle plate 14 are arranged for limiting.
After an earthquake occurs, damage is mainly concentrated on the buckling restrained brace, the main structure body is not damaged, and after the earthquake, only the buckling restrained brace 5 and other energy dissipation devices need to be replaced. The buckling restrained brace 5 can yield under compression and tension due to the structural characteristics of the buckling restrained brace, has excellent deformation capacity and hysteretic energy consumption capacity, is simple and convenient to construct and is convenient to maintain.
The connecting hinge can realize the quick connection between the prefabricated bridge pier and the bearing platform 8, and further reduces the workload of a construction site. The prestressed tendons 6 are stretched and anchored on the bottom plate of the connecting hinge in advance in a factory, and the connecting device and the bearing platform 8 only need to be simply connected on site, so that the connecting device has the advantages of great convenience and time cost.
The above embodiments may be implemented individually, or in any combination of two or more.
The above embodiments will be described in more detail with reference to specific examples.
Example 1:
as shown in fig. 1 to 4, the present embodiment provides a connection hinge suitable for a prefabricated pier, where the connection hinge mainly includes: an upper plate 3, a lower plate 4, a buckling restrained brace 5 and a prestressed tendon 6. The upper disc 3 is anchored at the bottom of the pier stud 1; a buckling restrained brace 5 is arranged between the upper disc 3 and the lower disc 4, and the buckling restrained brace 5 is connected with the upper disc 3 and the lower disc 4 through welding; a prestressed tendon 6 is also arranged between the upper disc 3 and the lower disc 4, one end of the prestressed tendon is anchored at the top of the pier stud 1, and the other end of the prestressed tendon is anchored on a bottom plate 13 of the lower disc; the lower plate 4 is fixed on the bearing platform 8.
The upper plate 3 in this embodiment needs to transmit a large load from the pier stud 1, and based on the principle of capability protection, the upper plate 3 is provided with enough shear nails 2 to ensure the anchoring performance between the upper plate 3 and the pier stud 1.
In the embodiment, the upper disc 3 comprises a top plate 9, a spherical hinge 10 and an upper baffle plate 11, wherein the spherical hinge 10 is positioned at the central position of the top plate 9, and the end part of the spherical hinge is a hemisphere; the upper baffle 11 is positioned at the outer side position below the top plate 9 and has a centrosymmetric structure; the lower disc 4 comprises a spherical hinge socket 12, a bottom plate 13 and a lower baffle plate 14; the spherical socket 12 is located at the center of the bottom plate 13, and the size of the spherical socket 12 is matched with that of the spherical hinge 10.
In the embodiment, the spherical hinge head 10 and the spherical hinge socket 12 are mutually nested, so that the transverse displacement of the upper disc 3 is limited; the ball joint 10 is supported on the ball socket 12, and the ball joint 10 bears vertical load and can rotate relative to the ball socket 12.
In the embodiment, the buckling restrained brace 5 is connected with the upper disc 3 and the lower disc 4 through welding, energy is dissipated through plastic deformation of the core material, the ductility and hysteretic energy dissipation capability of the buckling restrained brace are good, the buckling restrained brace has double functions of a common brace and an energy dissipation component, and the buckling restrained brace can be replaced after an earthquake.
In this embodiment, after the connecting hinge rotates, the gravity belongs to the overturning moment, so the prestressed tendon 6 with enough area should be arranged, so that the restoring moment of the connecting hinge is greater than the overturning moment, and the restorability is ensured.
Based on the principle of capability protection, the anchoring strength of the buckling restrained brace 5, the upper disc 3 and the lower disc 4 and the anchoring strength between the lower disc 4 and the bearing platform 8 are all larger than the requirement of the maximum earthquake force. The vertical bearing capacity of the ball joint 10 should be greater than the maximum seismic force requirement. The rotating torque of the connecting hinge is smaller than the equivalent yield bending moment at the bottom of the pier stud 1, a certain safety factor is set, and the pier stud is ensured to be in an elastic range.
The distance between the top plate 9 and the spherical hinge 12 is larger than the vertical displacement of the top plate 9 when the top plate 9 rotates to the designed rotation angle. The distance between the upper baffle plate 11 and the lower baffle plate 14 is determined according to the vertical displacement of the upper baffle plate 11 at the maximum design rotation angle.
Under normal use conditions, the ball joint 10 of the upper disc takes up vertical loads. The spherical hinge socket 12 can limit the transverse displacement of the upper-disc spherical hinge head 10 and play a role in shearing resistance. Meanwhile, the buckling restrained brace 5 and the prestressed tendons 6 limit the relative rotation between the upper disc 3 and the lower disc 4.
Under the action of an earthquake, the spherical hinge head 10 and the spherical hinge socket 12 rotate relatively, the structural period is prolonged, the buckling restrained brace 5 dissipates energy, and the prestressed tendon 6 is in an elastic state and provides restoring force, so that the self-resetting function is achieved. In order that the ball joint 10 of the upper disc does not collide with the corner of the ball socket 12 that transitions from the spherical inner wall to the platform section during rocking, the corner should be chamfered. In order to prevent the rotation angle of the connecting hinge under the action of large vibration from exceeding the design limit value, an upper baffle plate 11 and a lower baffle plate 14 are arranged for limiting.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a connect hinge suitable for pier is assembled in prefabrication, its characterized in that, supports including hanging wall, lower wall, prestressing tendons and bucking restraint, the hanging wall set up in the pier stud bottom, the lower wall then fix on the cushion cap, and the middle zone of hanging wall and lower wall is the spherical surface contact cooperation and forms the ball hinge structure, prestressing tendons one end anchor is on the pier stud, and the other end anchor is on the lower wall, the bucking restraint support arrange between hanging wall and lower wall and be located around the ball hinge structure.
2. The connecting hinge for the prefabricated pier assembly according to claim 1, wherein the upper plate comprises a top plate anchored to the bottom of the pier stud and a spherical hinge arranged on the lower surface of the top plate, the lower plate comprises a bottom plate fixed on the bearing platform and a spherical hinge socket arranged on the upper surface of the bottom plate, and the spherical hinge socket are in spherical contact to form the spherical hinge structure.
3. The connecting hinge for a precast pier for construction as claimed in claim 2, wherein the spherical socket is chamfered at a corner position where the spherical inner wall is transferred to the platform section.
4. The connecting hinge for the precast assembled pier according to claim 2, wherein the ball hinge is located at the center of the top plate, the ball socket is located at the center of the bottom plate, and the ball hinge is matched with the ball socket in size.
5. The connecting hinge suitable for the prefabricated assembled pier is characterized in that an upper baffle plate extending downwards is further arranged at the edge of the upper disc, a lower baffle plate extending upwards is further arranged at the edge of the lower disc, the upper baffle plate is opposite to the lower baffle plate, and a space is reserved between the upper baffle plate and the lower baffle plate.
6. The connecting hinge suitable for the prefabricated assembly pier is characterized in that the upper baffle plate and the lower baffle plate are respectively arranged in a central symmetry mode.
7. The connecting hinge suitable for the prefabricated assembly pier is characterized in that the upper disc is anchored at the bottom of the pier column through a shear nail according to claim 1.
8. The connecting hinge for a precast pier for construction according to claim 1, wherein the lower plate is fixed to the cap by an anchor bolt.
9. The connecting hinge suitable for the prefabricated assembled pier is characterized in that two ends of the buckling restrained brace are respectively and fixedly connected with the upper plate and the lower plate, the upper end of the prestressed tendon is anchored at the top of the pier stud, and the lower end of the prestressed tendon sequentially penetrates through the pier stud and the top plate and is anchored on the lower plate.
10. The connecting hinge suitable for the prefabricated pier assembly of claim 9, wherein the upper end and the lower end of the buckling restrained brace are welded to the upper plate and the lower plate respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447736.3A CN113186810A (en) | 2021-04-25 | 2021-04-25 | Connecting hinge suitable for prefabricated assembled bridge pier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110447736.3A CN113186810A (en) | 2021-04-25 | 2021-04-25 | Connecting hinge suitable for prefabricated assembled bridge pier |
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| Publication Number | Publication Date |
|---|---|
| CN113186810A true CN113186810A (en) | 2021-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110447736.3A Pending CN113186810A (en) | 2021-04-25 | 2021-04-25 | Connecting hinge suitable for prefabricated assembled bridge pier |
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| CN (1) | CN113186810A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351569A (en) * | 2022-01-13 | 2022-04-15 | 洛阳双瑞特种装备有限公司 | High-seismic-area bridge swinging seismic reduction and isolation restorer |
-
2021
- 2021-04-25 CN CN202110447736.3A patent/CN113186810A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114351569A (en) * | 2022-01-13 | 2022-04-15 | 洛阳双瑞特种装备有限公司 | High-seismic-area bridge swinging seismic reduction and isolation restorer |
| CN114351569B (en) * | 2022-01-13 | 2024-05-07 | 中船双瑞(洛阳)特种装备股份有限公司 | Vibration reduction and isolation restorer for bridge swing in high-vibration area |
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