CN114395977A - Replaceable shear-resistant energy dissipation device for hollow swing pier of high-speed railway - Google Patents
Replaceable shear-resistant energy dissipation device for hollow swing pier of high-speed railway Download PDFInfo
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- CN114395977A CN114395977A CN202210137410.5A CN202210137410A CN114395977A CN 114395977 A CN114395977 A CN 114395977A CN 202210137410 A CN202210137410 A CN 202210137410A CN 114395977 A CN114395977 A CN 114395977A
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- pier
- energy dissipation
- hollow
- dissipation device
- speed railway
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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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- 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
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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 discloses a replaceable shearing-resistant energy dissipation device for a hollow swing pier of a high-speed railway, which is detachably arranged in an inner cavity of the hollow pier, wherein a plurality of energy dissipation members are arranged at the bottom of the inner cavity of the hollow pier in an inclined strut mode, so that the shearing resistance of the pier body of the hollow pier can be ensured, the problem that the disassembly and installation space of the traditional energy dissipation device at the bottom of the swing pier is insufficient, the problem that the energy dissipation device is arranged outside the bottom of the pier and the service life is influenced by environmental erosion, and the problem of concentrated stress at the bottom of the pier can be solved, and the stress area at the bottom of the pier can be effectively increased. The arrangement of a plurality of scattered energy consumption components can realize energy consumption accumulation, and can also avoid great damage probability brought by arranging a great energy consumption device on the hollow pier. Under the normal use and the action of a multi-earthquake, the bridge pier does not have lifting and swinging of a pier bottom interface, and the stress is the same as that of the traditional bridge pier; under the action of design earthquake and rare earthquake, the pier generates lifting and separating swing of a pier bottom interface, and earthquake energy is dissipated through pier body swing and pier bottom energy dissipation components.
Description
Technical Field
The invention belongs to the field of seismic isolation and reduction of bridge engineering, and particularly relates to a replaceable shear-resistant energy dissipation device for a hollow swing pier of a high-speed railway.
Background
At present, the application and research of the swing bridge pier are mainly concentrated in a highway bridge, and related research about the high-speed railway bridge pier is rare. The swing pier has excellent shock insulation and self-resetting capability after shock, and the energy dissipation component is used as a main energy dissipation component of the swing pier and is easy to replace, so that the energy dissipation component is mostly arranged outside the pier body so as to be convenient to replace. However, the external energy dissipation member is easily corroded by external environment (such as rainwater, debris flow, mountain falling stone impact and the like), and the service life of the external energy dissipation member is greatly shortened.
The high-speed railway pier is generally a gravity type pier, the requirement on the shearing resistance of a pier body is high, the shearing resistance of the pier body of the hollow pier is relatively limited, and the existing pier bottom energy dissipation structure of the swing pier cannot provide additional shearing resistance for the pier body.
The energy consumption device of the existing swing pier system is mainly arranged at a lifting interface at the bottom of a pier, the stress of the swing interface at the bottom of the pier is complex, the problem of stress concentration exists, and the bottom of the pier is easily damaged under the action of strong shock.
The hollow pier generally needs to adopt a larger energy dissipation device, the damage probability of the hollow pier is greatly increased due to the fact that the energy dissipation device is too large, and the installation and disassembly space of the hollow pier is limited.
Disclosure of Invention
The invention aims to overcome the defects and provide a replaceable shear-resistant energy dissipation device for a hollow swinging pier of a high-speed railway.
The replaceable shear-resistant energy dissipation device for the high-speed railway hollow swinging pier is detachably arranged in an inner cavity of the hollow pier, and a plurality of energy dissipation components are arranged at the bottom of the inner cavity of the hollow pier in an inclined strut mode.
In an embodiment of the above replaceable shear-resistant energy dissipation device, the device includes a buckling-restrained brace rod frame and the energy dissipation member, the energy dissipation member is detachably fixed on the lower part of the brace rod frame, when the brace rod frame is fixedly installed, the upper end of the brace rod frame is detachably connected with an embedded sleeve on the upper part of the inner wall of the hollow pier through a mounting seat and a fastener, and the lower end of the brace rod frame passes through a bottom solid section of the hollow pier and is detachably connected with an embedded sleeve on the top of a foundation through a mounting seat and a fastener.
In an embodiment of the above replaceable shearing energy consumption device, the diagonal brace frame includes an upper diagonal brace, a lower diagonal brace and a hinged seat, the upper diagonal brace and the lower diagonal brace have the same number, the lower ends of the upper diagonal braces are connected to the upper portion of the hinged seat, the upper ends of the lower diagonal braces are connected to the lower portion of the hinged seat, the upper ends of the upper diagonal braces and the lower ends of the lower diagonal braces are hinged to the mounting seat respectively, and the upper diagonal brace and the lower diagonal brace can rotate around the hinged portion.
In an embodiment of the above replaceable shearing energy dissipation device, the hinge base includes two pairs of ear plates in a cross-shaped staggered arrangement, the outer sides of the intersecting regions of each pair of ear plates are connected through a connecting plate, and the outer sides of the corresponding intersecting regions on each ear plate are provided with oblique rod mounting holes.
In an embodiment of the above replaceable shear-resistant energy dissipation device, the lower sway bar includes an upper section and a lower section, and two ends of the energy dissipation member are detachably connected to the upper section and the lower section through fasteners, respectively.
In an embodiment of the above replaceable shear-resistant energy dissipation device, the lower end portion of the upper inclined rod and the upper end portion of the lower inclined rod are respectively inserted between the ear plates of the hinge seat and hinged through a pin.
In an embodiment of the above replaceable shear-resistant energy dissipation device, the mounting base includes a backing plate and a double-lug plate fixed to one side of the backing plate, the upper end portion of the upper diagonal rod and the lower end portion of the lower diagonal rod are respectively inserted between the double-lug plate and hinged to each other through a pin, and the backing plate is provided with a plurality of fastener mounting holes.
Under the normal use and the action of a frequently encountered earthquake, the bridge pier does not have lifting and swinging of the pier bottom interface, and the stress is the same as that of the traditional bridge pier; under the action of design earthquake and rare earthquake, the pier generates lifting and separating swing of a pier bottom interface, and earthquake energy is dissipated through pier body swing and pier bottom energy dissipation components. Because pier body and pile foundation disconnection, the pier-pile foundation bears the moment of flexure and is effectively released, and structural damage can restrict the weak position at the pier bottom, and the power consumption component promptly, and then can avoid the damage of pier body and pile foundation under the macroseism, and the power consumption device that the macroseism leads to the damage can continue to use by slightly repairing or changing in the short time, avoids the long-time indirect economic loss that brings of interrupting of traffic. The energy consumption device adopts the mode of bracing, sets up the weak position that bears the great shear force at the pier bottom, can effectively increase the shearing resistance ability of pier shaft. The energy dissipation device is arranged inside the hollow pier, so that the erosion of the external environment can be avoided, the design service life is ensured, and the problem of small installation and disassembly space is solved. The energy dissipation devices are prefabricated parts and only need to be assembled on site, so that the construction period can be greatly shortened, and the construction of a mountain structure is facilitated. Particularly, the diagonal brace rod frame is arranged in an inner cavity of the hollow pier, a plurality of energy dissipation members which are detachable from the diagonal brace rod frame are located at the bottom of the inner cavity, and the mounting seat connected with the lower section of the lower diagonal brace rod penetrates through a solid section at the bottom of the hollow pier and then is connected with the embedded sleeve on the mounting base, so that the shearing resistance of a pier body of the hollow pier can be guaranteed, the problem that the dismounting and mounting space of an energy dissipation device at the bottom of the traditional swing pier is insufficient, the problem that the energy dissipation device is arranged outside the pier bottom of the traditional swing pier and is influenced by environmental erosion in service life is solved, the problem of concentrated stress at the bottom of the traditional swing pier is solved, and the stress area at the bottom of the pier is effectively increased. The arrangement of the energy dissipation components can realize energy dissipation accumulation, so that the energy dissipation capacity is improved, and the energy dissipation components which are dispersedly arranged do not need to occupy larger installation space, so that the problem that the hollow pier is provided with a larger energy dissipation device to cause larger damage probability is solved. In addition, the energy consuming components can be individually and quickly replaced.
Drawings
Fig. 1 is a cross-sectional structural view of a transverse bridge according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional structural view of the longitudinal bridge direction in this embodiment.
Fig. 3a and 3b are schematic top views of fig. 1 (with the top solid section and energy consuming device removed).
Fig. 4 is a schematic three-dimensional structure diagram of the mounting base in the present embodiment.
Fig. 5 is a schematic three-dimensional structure diagram of the hinge seat of the present embodiment.
Detailed Description
As shown in fig. 1 to 5, the replaceable shear-resistant energy dissipation device for a hollow swinging pier of a high-speed railway disclosed by the embodiment comprises a diagonal brace rod frame and an energy dissipation member.
The diagonal brace frame of this embodiment includes articulated seat 1, goes up down diagonal 2, down diagonal upper portion section 3, down diagonal lower part section 4, mount pad 5, goes up diagonal 2 has four, and down diagonal upper portion section 3 and down diagonal lower part section 4 have four respectively, connect an energy consumption component 6 between them respectively.
The hinge base 1 is a formed part formed by welding two pairs of lug plates which are arranged in a crisscross manner, and inclined rod mounting holes are respectively formed in the outer sides of the intersection areas of each pair of lug plates.
The mounting base 5 includes a backing plate 51 and a double-lug plate 52 fixed on one side thereof, and a plurality of circular holes are symmetrically arranged at both ends of the backing plate 51.
When the diagonal brace frame is assembled, the upper ends of the upper diagonal braces 2 are inserted between the double lug plates of the mounting seat and then rotatably hinged through the pins, and the lower ends of the upper diagonal braces are respectively inserted between the upper parts of the two pairs of lug plates of the hinged seat and then rotatably hinged through the pins.
The upper ends of the upper sections 3 of the lower inclined rods are respectively inserted between the lower parts of the two pairs of ear plates of the hinge base and then are rotatably hinged through pins.
When the energy dissipation component 6 is assembled, two ends of the energy dissipation component are detachably connected with the upper section 3 of the lower inclined rod and the lower section 4 of the lower inclined rod through pins respectively.
When the diagonal brace frame is installed, workers enter the hollow pier from the access hole in the top of the hollow pier. When the diagonal brace frame is installed in the hollow pier 7, the hinge base 1 is located at the plane center position of the hollow pier, the installation bases 5 connected with the upper ends of the upper diagonal braces 3 are respectively connected with the embedded internal thread sleeves on the side walls of the hollow pier through high-strength bolts, and the installation bases 5 at the lower ends of the lower diagonal braces lower sections 4 penetrate through the bottom solid section of the hollow pier and then are connected with the embedded internal thread sleeves at the top groove of the foundation 8 through the high-strength bolts. The pre-embedded internally threaded sleeve is not shown in the figures.
Because the energy dissipation component is designed in a diagonal brace fixing mode, the upper and lower sections of the lower diagonal brace penetrate through the bottom solid section of the hollow pier in an inclined mode, namely when the hollow pier is poured, the bottom solid section is provided with the through hole as shown in a figure 3a or a figure 3b, and the size of the through hole needs to be designed according to the lifting height of the pier bottom limit, so that the energy dissipation component is prevented from colliding with the lower section of the lower diagonal brace in the swinging process of the pier.
After the diagonal brace frame is installed, the bearing area of the base plates 51 of the installation seats 5 at the upper end of the upper diagonal brace 3 and the end part of the lower section 4 of the lower diagonal brace can be increased, and stress concentration is avoided; the upper end of the upper inclined rod 3 and the lower end of the lower inclined rod lower section 4 are rotatably hinged with the ear plates of the concealed rotating seat through pins respectively, and damage caused by additional bending moment generated at joints can be avoided. Each inclined rod is rotatably hinged with the ear plate of the hinge seat through a pin, so that damage caused by additional bending moment generated by a node can be avoided. Namely, each hinged joint of the diagonal brace rod frame can flexibly rotate, thereby ensuring the normal work of the energy dissipation component on the diagonal brace rod.
The working principle of the installed energy consumption device is as follows:
under normal use and in the action state of meeting earthquake frequently, the hollow pier does not have the lifting and swinging of the pier bottom interface, the stress is the same as that of the traditional pier, and the energy consumption device does not have the action at the moment. It should be noted that, in normal use and under the action of frequent earthquakes, in order to achieve the anti-seismic goal of not causing the lifting and the rotation of the pier bottom interface, the method of expanding the foundation of the pier bottom or additionally arranging the unbonded prestressed tendon between the axial center of the hollow pier and the foundation can be adopted to increase the lifting and the bending moment of the pier bottom.
Under the action of designed earthquake, rare earthquake and extremely rare earthquake, the pier bottom interface is opened, the pier begins to swing, and meanwhile, the energy consumption component is caused to deform, so that part of earthquake energy is dissipated. The energy consumption device can transmit the internal force of the swing interface at the bottom of the pier upwards, so that the problem of concentrated stress at the bottom of the pier is avoided, and the stress area at the bottom of the pier is effectively increased; meanwhile, the energy consumption device can provide additional shearing force, and the shearing resistance bearing capacity of the weak part of the hollow pier is effectively increased.
The invention has the following advantages:
under the normal use and the action of a multi-earthquake, the bridge pier does not have lifting and swinging of a pier bottom interface, and the stress is the same as that of the traditional bridge pier; under the action of design earthquake and rare earthquake, the pier generates lifting and separating swing of a pier bottom interface, and earthquake energy is dissipated through pier body swing and pier bottom energy dissipation components.
Because pier body and pile foundation disconnection, the pier-pile foundation bears the moment of flexure and is effectively released, and structural damage can restrict the weak position at the pier bottom, and the power consumption component promptly, and then can avoid the damage of pier body and pile foundation under the macroseism, and the power consumption component that the macroseism leads to the damage is detachable connected mode on the bracing strut frame, can add slightly in the short time and restore or change and can continue to use, avoid the long-time terminal indirect economic loss who brings of traffic.
The energy dissipation component adopts the mode of bracing, sets up the weak position that bears the great shear force at the pier bottom, can effectively increase the shear resistance ability of pier shaft.
The energy dissipation component sets up inside hollow pier, can avoid the external environment to corrode, makes design life obtain guaranteeing, and the setting of a plurality of energy dissipation components can realize the energy consumption and add up on the bracing strut frame to improve the power consumption ability, and the energy dissipation component that the dispersion set up need not to occupy great installation space, has overcome the little problem in installation and disassembly space, can also avoid hollow pier to set up great damage probability that great power consumption device brought.
The structural members of the energy dissipation device can be produced in advance or purchased outside, and only on-site assembly is needed, so that the construction period can be greatly shortened, and the construction of mountain structures is facilitated.
Claims (7)
1. The utility model provides a removable energy consumption device that shears to hollow pier that sways of high-speed railway which characterized in that: the energy dissipation device is detachably arranged in the inner cavity of the hollow pier, and a plurality of energy dissipation components are arranged at the bottom of the inner cavity of the hollow pier in an inclined strut mode.
2. The replaceable shear-resistant energy dissipation device for the hollow rocking pier of the high-speed railway according to claim 1, wherein: the device includes the diagonal brace frame of buckling restrained with the power consumption component, the power consumption component can be dismantled and be fixed in the lower part of diagonal brace frame, and when the installation of diagonal brace frame was fixed, its upper end can be dismantled with the pre-buried sleeve on hollow pier inner wall upper portion through mount pad and fastener and be connected, and the lower extreme passes behind the bottom entity section of hollow pier can dismantle with the pre-buried sleeve at basic top through mount pad and fastener and be connected.
3. The replaceable shear-resistant energy dissipation device for the hollow rocking pier of the high-speed railway as claimed in claim 2, wherein: the bracing strut frame includes down tube, down tube and articulated seat, goes up the down tube and the quantity of down tube is the same, and the lower extreme of many last down tubes is connected in the upper portion of articulated seat, and the upper end of many down tubes is connected in the lower part of articulated seat, and the upper end of each last down tube and the lower extreme of down tube articulate respectively the mount pad, go up the down tube and all can rotate around its articulated department with down tube.
4. The replaceable shear-resistant energy dissipation device for the hollow rocking pier of the high-speed railway as claimed in claim 3, wherein: the hinged seat comprises two pairs of ear plates which are arranged in a crossed and staggered mode, the outer sides of the intersecting areas of each pair of ear plates are connected through a connecting plate, and inclined rod mounting holes are formed in the outer sides of the corresponding intersecting areas of the ear plates.
5. The replaceable shear-resistant energy dissipation device for the hollow rocking pier of the high-speed railway as claimed in claim 4, wherein: the lower inclined rod comprises an upper section and a lower section, and two ends of the energy consumption component are detachably connected with the upper section and the lower section through fasteners respectively.
6. The replaceable shear-resistant energy dissipation device for the hollow rocking pier of the high-speed railway as claimed in claim 5, wherein: the lower end part of the upper inclined rod and the upper section end part of the lower inclined rod are respectively inserted between the ear plates of the hinge seat and are hinged through a pin shaft.
7. The replaceable shear-resistant energy dissipation device for the hollow rocking pier of the high-speed railway as claimed in claim 2, wherein: the mounting base comprises a base plate and a double lug plate fixed on one side of the base plate, the upper end part of the upper inclined rod and the lower section end part of the lower inclined rod are respectively inserted between the double lug plates and hinged through a pin shaft, and a plurality of fastener mounting holes are formed in the base plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210137410.5A CN114395977B (en) | 2022-02-15 | 2022-02-15 | Replaceable shear-resistant energy dissipation device for hollow swing pier of high-speed railway |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210137410.5A CN114395977B (en) | 2022-02-15 | 2022-02-15 | Replaceable shear-resistant energy dissipation device for hollow swing pier of high-speed railway |
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| CN114395977A true CN114395977A (en) | 2022-04-26 |
| CN114395977B CN114395977B (en) | 2023-03-21 |
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| CN202210137410.5A Active CN114395977B (en) | 2022-02-15 | 2022-02-15 | Replaceable shear-resistant energy dissipation device for hollow swing pier of high-speed railway |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10131120A (en) * | 1996-10-31 | 1998-05-19 | Mitsubishi Heavy Ind Ltd | Bridge pier |
| CN104452567A (en) * | 2014-12-03 | 2015-03-25 | 大连海事大学 | Novel swing type double-deck bridge bent frame |
| CN104674649A (en) * | 2015-03-26 | 2015-06-03 | 大连海事大学 | Novel earthquake damage control system for thin-wall hollow pier |
| CN206768577U (en) * | 2017-05-09 | 2017-12-19 | 宁波大学 | A kind of damaged controllable two-columned pier |
| CN110306422A (en) * | 2019-06-17 | 2019-10-08 | 同济大学 | A kind of novel seismic isolation device |
| CN111962384A (en) * | 2020-08-03 | 2020-11-20 | 河海大学 | Anti-seismic pier with built-in energy dissipation device and construction method thereof |
| CN113481833A (en) * | 2021-07-23 | 2021-10-08 | 北京工业大学 | Prefabricated assembly type swing pier structure system with additional energy dissipation support or self-resetting energy dissipation support |
-
2022
- 2022-02-15 CN CN202210137410.5A patent/CN114395977B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10131120A (en) * | 1996-10-31 | 1998-05-19 | Mitsubishi Heavy Ind Ltd | Bridge pier |
| CN104452567A (en) * | 2014-12-03 | 2015-03-25 | 大连海事大学 | Novel swing type double-deck bridge bent frame |
| CN104674649A (en) * | 2015-03-26 | 2015-06-03 | 大连海事大学 | Novel earthquake damage control system for thin-wall hollow pier |
| CN206768577U (en) * | 2017-05-09 | 2017-12-19 | 宁波大学 | A kind of damaged controllable two-columned pier |
| CN110306422A (en) * | 2019-06-17 | 2019-10-08 | 同济大学 | A kind of novel seismic isolation device |
| CN111962384A (en) * | 2020-08-03 | 2020-11-20 | 河海大学 | Anti-seismic pier with built-in energy dissipation device and construction method thereof |
| CN113481833A (en) * | 2021-07-23 | 2021-10-08 | 北京工业大学 | Prefabricated assembly type swing pier structure system with additional energy dissipation support or self-resetting energy dissipation support |
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