CN114622483B - Assembled swinging pier with built-in energy dissipation device and prefabricating and assembling method thereof - Google Patents
Assembled swinging pier with built-in energy dissipation device and prefabricating and assembling method thereof Download PDFInfo
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- CN114622483B CN114622483B CN202210419670.1A CN202210419670A CN114622483B CN 114622483 B CN114622483 B CN 114622483B CN 202210419670 A CN202210419670 A CN 202210419670A CN 114622483 B CN114622483 B CN 114622483B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/002—Producing shaped prefabricated articles from the material assembled from preformed elements
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- 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
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Abstract
The invention discloses an assembled swing pier with a built-in energy dissipation device and a prefabrication and assembly method thereof.A hollow pier body of the pier is divided into a pier bottom section, a pier top section and a plurality of sections of standard sections between the pier bottom section and the pier top section, wherein an inner cavity is fixed with a buckling-restrained energy dissipation device along the height direction of the standard section when the standard section is prefabricated, and a mounting seat is fixed in the inner cavity when the pier top section is prefabricated; the pier bottom section and the axial center of the cast-in-place concrete foundation are anchored with unbonded prestressed reinforcements, and rod type dampers are hinged on the two transverse sides; the pier bottom section and the standard section are positioned and assembled through dowel bars, and the rod type damper is hinged with an energy dissipation component of the buckling-restrained energy dissipation device through a steel connecting rod; the adjacent standard sections are positioned and assembled through the dowel bars, and the upper energy dissipation component and the lower energy dissipation component are hinged through steel connecting rods; the standard section and the pier top section are positioned and assembled through dowel bars, and energy dissipation components of the buckling-restrained energy dissipation device are hinged with a mounting seat on the inner wall of the pier top section through steel connecting rods. The bridge pier has the advantages of being fast in site construction, good in bridge pier integrity, strong in lateral stiffness resistance and remarkable in damping effect.
Description
Technical Field
The invention belongs to the field of swing piers, and particularly relates to an assembled swing pier with a built-in energy dissipation device and a prefabricating and assembling method thereof.
Background
The bridge is used as a junction project of a traffic lifeline and is the key point for recovering functions of traffic infrastructure after an earthquake. The swinging structure can control earthquake damage on a swinging interface to avoid damage to a main body structure, and has better earthquake resistance and self-resetting capability, so the swinging structure has remarkable advantages in the aspect of improving the recovery capability of the structure after earthquake.
At present, the main research content of the swing pier focuses on the combined application of an unbonded prestress technology and an energy consumption device with the swing pier, and an unbonded prestress beam plays a vital role in improving the anti-overturning capacity of the swing pier and reducing the residual displacement. At present, most of energy consumption devices adopt the form of external dampers, so that the daily maintenance work of the energy consumption devices is complicated, and the dampers are used as the energy consumption devices and need to be maintained and replaced regularly, so that the economic loss and the resource waste are increased.
The traditional railway hollow pier is cast in sections on site, needs to operate according to the weather, and can delay the construction period and cause certain loss if severe weather is met. And the pier of cast in situ construction can produce a large amount of rubbish in the construction process, has certain harm to the ecological environment. Therefore, the industrialized segment splicing construction technology can be produced in the bridge construction. Although the segment assembly technology can accelerate the construction progress, the shearing resistance of the pier at the joint position is weak, and the integrity is poor. So the current engineering application does not involve much prefabrication and assembly technology.
Disclosure of Invention
The invention aims to provide an assembled swinging pier with a pier body having good integrity and a built-in energy consumption device and a prefabricating and assembling method thereof.
The invention provides an assembled swinging pier with a built-in energy dissipation device.A hollow pier body is divided into a pier bottom section, a pier top section and a plurality of sections of standard sections between the pier bottom section and the pier top section, wherein the buckling-restrained energy dissipation device is fixed on the side wall of an inner cavity along the height direction of the standard sections when the standard sections are prefabricated, and a mounting seat is fixed on the side wall of the inner cavity when the pier top section is prefabricated; the pier bottom section and the axial center of the cast-in-place concrete foundation are anchored with unbonded prestressed reinforcements, and rod type dampers are hinged on the two transverse sides; the pier bottom section and the standard section are positioned and assembled through dowel bars, and the rod type damper is hinged with an energy dissipation component of the buckling-restrained energy dissipation device through a steel connecting rod; adjacent standard sections are positioned and assembled through dowel bars, and energy dissipation components of the upper buckling-restrained energy dissipation device and the lower buckling-restrained energy dissipation device are hinged through steel connecting rods; the standard section and the pier top section are positioned and assembled through dowel bars, and energy dissipation components of the buckling-restrained energy dissipation device are hinged with a mounting seat on the inner wall of the pier top section through steel connecting rods.
In an embodiment of the pier, the bottom of the inner cavity of the pier bottom section is a solid section, the middle of the bottom surface of the solid section is a downward convex arc-shaped boss, and the bottom surfaces of the pier walls on two sides of the arc-shaped boss are upward-folded arc surfaces; the solid section is provided with mounting holes for mounting the unbonded prestressed reinforcement and the rod-type damper.
In an embodiment of the above pier, the round end inner wall of the standard section is symmetrically arranged about the transverse central plane, the buckling restrained energy dissipation device comprises the energy dissipation component and the installation sleeve, the energy dissipation component comprises a support core body with a cross section shape including multiple crossed support arms and hinges at two ends of the support core body, the cross section shape of the installation sleeve is a horizontally inverted T-shaped structure, the outer surface of a wing plate of the installation sleeve is an arc surface matched with the inner wall of the pier body, the outer end of a web plate of the installation sleeve is provided with an installation hole for supporting the inner core, and the hinges at two ends of the support inner core respectively extend out of the web plate of the installation sleeve.
In an embodiment of the bridge pier, the hinge joint is a U-shaped joint with an assembly notch.
In an embodiment of the bridge pier, the steel connecting rods between adjacent segments are in a cross-bracing arrangement.
In an embodiment of the foregoing pier, the mount pad is a T-shaped mount pad, the outer surface of the wing plate is an arc shape matching the inner wall of the circular end of the pier body, the end section of the web plate is a U-shaped clamping section, and circular holes are symmetrically formed on two sides of the U-shaped clamping section.
The factory prefabricating method of the assembly type swing pier provided by the invention comprises the following steps:
1. prefabrication of pier bottom section
Reserving unbonded prestressed reinforcement mounting holes and rod type damper mounting holes during prefabrication;
2. standard section prefabrication
(1) Prefabricating a pier body section, and arranging an embedded part for fixing the mounting sleeve at a specified position of a circular end of an inner cavity of the pier body section;
(2) Connecting and fixing the mounting sleeve with the embedded part through a high-strength bolt;
3. pier top section prefabrication
(1) The prefabricated pier body section is characterized in that an embedded part for fixing the mounting base is embedded in a designated position of a circular end of an inner cavity of the prefabricated pier body section, a pin bolt for connecting a structural box girder is embedded in the center of the top surface of the prefabricated pier body section, spiral stirrups are arranged around the prefabricated pier body section, and an inspection hole is reserved in the top surface of the prefabricated pier body section;
(2) And connecting and fixing the mounting seat with the embedded part through a high-strength bolt.
The invention provides a field construction method of the assembly type swing pier, which comprises the following steps:
(1) Cast-in-place foundation
An upper groove and an axial center hole are reserved in the center of the bottom surface of the steel bar, and are used for mounting unbonded prestressed steel bars; reserving a rod type damper mounting hole and a support at a designated position; a lower groove is reserved in the center of the top surface and used for assembling the pier bottom section of the hollow pier body;
curing the concrete to be qualified;
(2) Drilling holes on the splicing surfaces of all the sections, fixedly inserting the holes, and staggering the positions of the dowel bars between adjacent splicing sections;
(3) The pier bottom section is assembled and fixed with the foundation
Respectively fixing the lower ends of the unbonded prestressed reinforcement and the rod-type damper with the foundation, centering and embedding the pier bottom section into a lower groove on the top surface of the foundation, anchoring the unbonded prestressed reinforcement and the solid section of the pier bottom section, and extending the upper end of the rod-type damper out of the solid section of the pier bottom section;
pouring a fiber concrete supporting seat between the outer wall of the round end of the pier bottom section and the top surface of the foundation;
(4) The upper end of the rod-type damper is hinged with a steel connecting rod;
(5) Hoisting the first section of standard section to the upper part of the pier bottom section, positioning and assembling the first section of standard section and the pier bottom section through the dowel bars, and then erecting a formwork at a joint to pour concrete;
(6) Hinging a steel connecting rod hinged at the upper end of the rod type damper with an energy consumption component of the buckling-restrained energy consumption device on the inner wall of the first section of the standard section, wherein the steel connecting rod is arranged in a cross brace manner;
(7) Hoisting the second section of standard section to the upper part of the first section of standard section, positioning and assembling the second section of standard section and the first section of standard section through dowel bars, and then erecting a formwork at a joint to pour concrete;
(8) Hinging the energy dissipation components on the same side of the two standard sections through steel connecting rods arranged in a cross-bracing manner;
(9) Repeating the steps (7) and (8) until all the standard sections are assembled, and hinging a steel connecting rod at the upper end of the energy consumption component of the highest standard section;
(10) Assembling pier top section with highest standard section
Hoisting the pier top section to the position above the standard section, positioning and assembling through the dowel bars, and then erecting a formwork at the joint to pour concrete;
the upper end of a steel connecting rod hinged with the upper end of the energy dissipation component of the standard section is hinged with a mounting seat fixed on the inner wall of the pier top section, and the steel connecting rod is arranged in a cross brace manner;
(11) And a rubber pad is fixedly arranged on the top surface of the pier top section.
The hollow pier body is divided into a pier top section, a standard section and a pier bottom section which are prefabricated independently, the three prefabricated sections are spliced in a mode of '1 + N + 1', the size of N is determined by the height of a pier, and the height of the pier is controlled by changing the size of the number N of the standard prefabricated sections of the pier. After each section is prefabricated in a factory, a corresponding built-in structure is installed and fixed at a set position on the inner wall, and only butt joint pouring seams and hinged steel connecting rods of each section are needed on the site, so that construction is convenient and efficient, and the environment cannot be damaged. By adopting the installation method, the installation of the whole swing pier can be completed at one time, the installation steps are few, the efficiency is high, the construction period is effectively shortened, the labor cost is saved, and the replacement and repair after the earthquake are facilitated. The standard section is internally provided with the buckling-restrained energy dissipation device which has the advantages of good energy dissipation capability, reduction of structure displacement, enhancement of structure lateral rigidity resistance and the like. The buckling-restrained energy dissipation device has good strength and energy dissipation capacity, stable performance and remarkable damping effect. The steel connecting rods of the buckling-restrained energy dissipation devices connected in series are arranged in a cross-brace mode, and the joint bars are arranged at the joints, so that the shearing resistance of the joints and the integrity of the bridge pier can be improved.
Drawings
Fig. 1 is a cross-bridge cross sectional view of a bridge pier according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating prefabrication of a pier bottom section of the hollow pier body in the embodiment.
Fig. 3 is a schematic diagram of prefabricating a standard section of the hollow pier body in the embodiment.
Fig. 4 is a schematic diagram of prefabrication of the pier top section of the hollow pier body in the embodiment.
Fig. 5 is an exploded view of the buckling restrained energy dissipation device in this embodiment.
Fig. 6 is an exploded view of the assembly of the steel tie rod to the inner wall mount of the pier top segment in this embodiment.
Detailed Description
As shown in fig. 1, in the fabricated swinging bridge pier with the built-in energy dissipation device disclosed in this embodiment, the hollow pier body 1 is divided into a bottom pier section 11, a standard section 12 and a top pier section 13, which are prefabricated in a factory, the bottom pier section 11 and the top pier section 13 are respectively one section, the standard section 12 is prefabricated into multiple sections according to the requirement of the pier height, and three standard sections are shown in fig. 1. Namely, the hollow pier body prefabrication with the same pier body section and different pier heights can be prefabricated by adopting the same die. All sections of the hollow pier body are prefabricated in a factory and then transported to a construction site to be assembled into a whole, and the pier bottom section is assembled and fixed with the cast-in-place concrete foundation.
As shown in fig. 1 and 2, the bottom of the inner cavity of the pier bottom section 11 is provided with a solid section, the middle part of the bottom surface of the solid section is provided with a downward convex arc-shaped boss, and the bottom surfaces of the pier walls at the two sides of the arc-shaped boss are upwards-folded arc surfaces; the solid section is provided with an axial center hole for installing unbonded prestressed reinforcement 6, and is provided with two pairs of axial holes which are symmetrical about the transverse center plane of the pier body and are used for installing a rod-type damper 7.
As shown in fig. 1 and 3, two pairs of buckling-restrained energy dissipation devices 2 which are symmetrical with respect to the transverse center plane of the pier body are fixed on the inner wall of the pier body of the standard section 12.
As shown in fig. 1 and 5, the buckling-restrained energy dissipating device 2 includes an energy dissipating member 21 and a mounting sleeve 22.
The dissipative member 21 comprises a supporting core 211 having a cross-sectional shape and U-shaped heads 212 at both ends thereof.
The cross section of the mounting sleeve 22 is in a horizontally inverted T shape, the outer surface of a wing plate of the mounting sleeve is an arc surface matched with the inner wall of the standard section 12, and the outer end of a web plate is provided with a core body mounting hole.
After the supporting core body 211 and the mounting sleeve 22 are assembled, the U-shaped heads 212 at the two ends are respectively positioned outside the web plate of the mounting sleeve 22, and lubricating oil is smeared on the inner wall of the core body mounting hole before the supporting core body 211 is mounted, so that the supporting core body can slide up and down conveniently.
The end plate of the mounting sleeve 22 is fixed by a high-strength bolt, and an embedded part for connecting the high-strength bolt is embedded in the pier body of the standard section 12 during prefabrication. And after the pier body is prefabricated, the buckling-restrained energy dissipation device 2 is installed.
The cross section of the supporting core body 211 can also be selected from other structural forms such as an I shape, a Chinese character 'mi' shape and the like.
As shown in fig. 1 and 4, two pairs of mounting seats 3 symmetrically fixed relative to the transverse center plane of the pier body are fixed on the inner wall of the pier top section 13, the mounting seats 3 are T-shaped seats, the outer surfaces of the wing plates of the mounting seats are arc-shaped and matched with the inner wall of the pier body, the end sections of the web plates of the mounting seats are U-shaped clamping sections, and round holes are symmetrically arranged on two sides of each U-shaped clamping section.
When the pier body of the pier top section 13 is prefabricated, a sleeve is pre-embedded at the specified position of the side wall of the inner cavity of the pier top section and is used for connecting and fixing a high-strength bolt of the mounting base 3; the pin bolt 4 is pre-embedded at the center of the top surface, the spiral stirrup is arranged around the pin bolt, and an inspection hole is reserved on the top surface.
As can be seen from fig. 1, unbonded prestressed reinforcement 6 and two pairs of rod dampers 7 which are symmetrical about the transverse center plane of the pier body are installed between the axial center of the pier bottom section 11 and the cast-in-place foundation 5, and the rod dampers can be conventional procurement parts.
As shown in fig. 1, the upper end of the rod-type damper 7 is hinged to the energy dissipation members 21 of the first section of the standard section 11 through the steel connecting rods 8 arranged in a cross manner, the energy dissipation members 21 of the upper and lower standard sections are hinged to each other through the steel connecting rods 8 arranged in a cross manner, and the energy dissipation member of the highest standard section is hinged to the mounting seat 3 of the pier top section 13 through the steel connecting rods 8 arranged in a cross manner.
As shown in fig. 6, rectangular ear plates are symmetrically arranged at two ends of the steel connecting rod 8 along the axial center plane, and are hinged with the mounting base 3 through bolts through the rectangles.
The field construction process of the whole bridge pier is as follows:
(1) The cast-in-place foundation 5 is provided with an upper groove and an axial center hole at the center of the bottom surface for installing the unbonded prestressed reinforcement 6; reserving a rod type damper 7 mounting hole and a mounting support at a designated position; a lower groove is reserved in the center of the top surface and used for embedding and assembling the pier bottom section; maintaining the cast-in-place foundation;
(2) Drilling holes on the splicing surfaces of the pier bodies of all the sections, fixing the dowel bars 9, and arranging the dowel bars between the adjacent sections in a staggered manner so as to improve the strength of splicing seams;
(3) The pier bottom section is assembled and fixed with the foundation
Respectively fixing the lower ends of the unbonded prestressed reinforcement 6 and the rod-type damper 7 with the foundation, centering and embedding the pier bottom section 11 into a lower groove on the top surface of the foundation, anchoring the unbonded prestressed reinforcement 6 with the top surface of the solid section of the pier bottom section, and extending the upper end of the rod-type damper 7 out of the solid section of the pier bottom section; pouring fiber concrete 10 between two ends of the pier bottom section and the top surface of the foundation to serve as a supporting seat;
(4) The upper end of the rod-type damper 7 is hinged with a steel connecting rod 8;
(5) Hoisting the first section of standard section 12 to the position above the pier bottom section 11, positioning and assembling the first section of standard section and the pier bottom section through the dowel bars 9, and then erecting a formwork at a joint to pour concrete;
(6) Hinging a steel connecting rod 8 hinged at the upper end of the rod type damper 7 with an energy consumption component 21 of the buckling-restrained energy consumption device 2 on the inner wall of the first section of the standard section 12, and paying attention to the fact that the steel connecting rod 8 is arranged in a cross brace manner;
(7) Hoisting the second section of standard section 12 to the upper part of the first section of standard section, positioning and assembling the second section of standard section and the first section of standard section through the dowel bars 9, and then erecting a formwork at the joint for pouring concrete;
(8) The energy dissipation components 21 at the same side of the two standard sections are hinged through steel connecting rods 8 which are arranged in a cross-bracing manner;
(9) Repeating the steps (7) and (8) until all the standard sections are assembled, and hinging a steel connecting rod 8 at the upper end of the energy consumption component 21 of the highest standard section;
(10) Assembling pier top section with highest standard section
Hoisting the pier top section 13 to the position above the standard section 12, positioning and assembling through the dowel bars 9, and then erecting a formwork at the joint to pour concrete; the upper end of a steel connecting rod 8 hinged with the upper end of the standard section energy consumption component 21 is hinged with a mounting seat 3 fixed on the inner wall of the pier top section;
(11) A rubber pad XJD is fixed on the top surface of the pier top section.
As shown in fig. 1, the pier top of the pier and the structural box girder are connected by a pin 4, and a rubber pad XJD is provided around the pin.
Aiming at the defects of the prior art of the swing hollow pier, the invention mainly solves the following problems:
1. when the buckling-restrained energy dissipation device bears the action of an earthquake, the buckling-restrained energy dissipation device is mainly used for restraining the axial pressure of the support core body of the yielding section, so that the buckling-restrained energy dissipation device can generate transverse displacement, and the installation sleeve can restrain and limit the lateral deformation of the support core body, so that the support core body has the effect of yielding but not yielding. The buckling-restrained energy dissipation device has the advantages that the bearing capacity of the support core body can be prevented from being reduced due to the loss of stability, the support core body has good strength and energy dissipation capacity, the performance is stable, the damping effect is obvious, and the buckling-restrained energy dissipation device is an anti-seismic energy dissipation component with excellent performance. The buckling-restrained energy dissipation device is adopted to replace a damper, and the energy borne by the pier can be dissipated by buckling under the action of an earthquake. The buckling-restrained energy dissipation device has the characteristic of stable performance, provides lateral stiffness for the structure under the normal bearing condition, and consumes energy input into the structure through tension-compression hysteresis under the earthquake action. Compared with the damper, the damper can reduce the loss of the energy dissipation component in a normal operation state, reduce the maintenance and replacement cost after the earthquake, has obvious damping effect and has good application value.
2. The lateral displacement of the pier is remarkably increased under the action of an earthquake, the support core body serving as the energy dissipation member can enter an inelastic state before the pier, a part of energy input into the structure is consumed through the energy dissipation capacity of the support core body, the time for the pier to enter the inelastic state is delayed, the interlayer displacement and the interlayer displacement angle of the pier are effectively reduced, the pier is prevented from being damaged due to the increase of the displacement, and the earthquake response of a structural layer is reduced.
3. The buckling-restrained energy dissipation device and the steel connecting rods are connected in series, and the steel connecting rods are arranged in a cross mode to form a cross brace shape. The buckling-restrained energy dissipation device improves the rigidity and simultaneously reduces the displacement of the pier, so that the pier has better anti-seismic performance, and the effect of achieving multiple purposes is achieved.
4. The energy dissipation device is arranged inside the hollow pier, so that the hollow pier is prevented from being exposed to the sun and rain, the related metal device is not easy to rust, the durability of the structure is improved, and the hollow pier has better economic benefit and practicability.
5. The construction method that the bridge piers are prefabricated in sections in a factory and only cast-in-place concrete is cast at the joints of the bridge piers in sections and assembled in a construction site can well solve the problems that the construction period is delayed and the loss is caused due to factors such as weather when the traditional swing hollow bridge piers are cast in sections in the site, and meanwhile, the damage to the environment caused by a large amount of industrial garbage generated by cast in the site is avoided.
6. Aiming at the problems of weak shearing resistance and poor integrity of the joint of the pier caused by adopting a segmental prefabrication and assembly construction method, the invention can well solve the problems by treating the built-in energy consumption device. Inside the pier, arrange the steel connecting rod of series connection support core into the form of bridging, arrange pre-buried reinforcing bar in the seam crossing simultaneously to the shearing ability and the wholeness of pier of assembled hollow pier in the seam crossing have been improved.
7. The restoring force of the prestressed reinforcement can limit the swing amplitude of the pier in the earthquake to a certain extent, the upper structure of the bridge is not deformed excessively due to the excessively large swing amplitude, and meanwhile, due to the restoring force effect of the prestressed reinforcement, the residual displacement of the bridge structure after the earthquake can be reduced or eliminated, and the rapid traffic can be realized after the disaster.
Claims (8)
1. The utility model provides a pier is swayd to built-in power consumption device's assembled, its characterized in that:
the hollow pier body is divided into a pier bottom section, a pier top section and a plurality of sections of standard sections between the pier bottom section and the pier top section, when the standard sections are prefabricated, the side wall of an inner cavity is fixed with a buckling-restrained energy dissipation device along the height direction of the standard sections, and when the pier top section is prefabricated, the side wall of the inner cavity is fixed with a mounting seat;
the pier bottom section and the axial center of the cast-in-place concrete foundation are anchored with unbonded prestressed reinforcements, and rod type dampers are hinged on the two transverse sides;
the pier bottom section and the standard section are positioned and assembled through dowel bars, and the rod type damper is hinged with an energy consumption component of the buckling-restrained energy consumption device through steel connecting rods which are arranged in a crossed mode;
adjacent standard sections are positioned and assembled through dowel bars, and energy dissipation components of the upper buckling-restrained energy dissipation device and the lower buckling-restrained energy dissipation device are hinged through steel connecting rods which are arranged in a crossed mode;
the standard section and the pier top section are positioned and assembled through dowel bars, and energy dissipation components of the buckling-restrained energy dissipation device are hinged with a mounting seat on the inner wall of the pier top section through steel connecting rods.
2. The fabricated type rocking pier with built-in energy dissipation device according to claim 1, wherein: the bottom of the inner cavity of the pier bottom section is a solid section, the middle part of the bottom surface of the solid section is a downward convex arc-shaped boss, and the bottom surfaces of pier walls on two sides of the arc-shaped boss are upwards-folded arc surfaces; the solid section is provided with mounting holes for mounting the unbonded prestressed reinforcement and the rod-type damper.
3. The fabricated rocking pier with built-in energy dissipation device according to claim 1, wherein: the inner wall of the round end of the standard section is symmetrically arranged about a transverse central plane, the buckling-restrained energy dissipation device comprises an energy dissipation component and an installation sleeve, the energy dissipation component comprises a support core body with a plurality of crossed support arms and hinges at two ends of the support core body, the cross section of the installation sleeve is in a horizontally inverted T shape, the outer surface of a wing plate of the installation sleeve is an arc surface matched with the inner wall of a pier body, an installation hole for supporting an inner core is formed in the outer end of a web plate of the installation sleeve, and the hinges at two ends of the support inner core respectively extend out of the web plate of the installation sleeve.
4. The fabricated rocking pier with built-in energy dissipation device according to claim 3, wherein: the hinged joint is a U-shaped head with an assembly notch.
5. The fabricated type rocking pier with built-in energy dissipation device according to claim 1, wherein: the steel connecting rods between the adjacent segments are arranged in a cross-bracing manner.
6. The fabricated type rocking pier with built-in energy dissipation device according to claim 1, wherein: the mounting seat is T-shaped, the outer surface of a wing plate of the mounting seat is arc-shaped and matched with the inner wall of the round end of the pier body, the end section of a web plate of the mounting seat is a U-shaped clamping section, and round holes are symmetrically formed in the two sides of the U-shaped clamping section.
7. A factory prefabrication method of the fabricated rocking pier of claim 3, comprising the steps of:
1. prefabrication of pier bottom section
Reserving unbonded prestressed reinforcement mounting holes and rod type damper mounting holes during prefabrication;
2. prefabrication of standard sections
(1) The prefabricated pier body section is provided with an embedded part used for fixing the mounting sleeve at the designated position of the inner cavity round end;
(2) Connecting and fixing the mounting sleeve with the embedded part through a high-strength bolt;
3. pier top section prefabrication
(1) The prefabricated pier body section is characterized in that an embedded part for fixing the mounting base is embedded in a designated position of a circular end of an inner cavity of the prefabricated pier body section, a pin bolt for connecting a structural box girder is embedded in the center of the top surface of the prefabricated pier body section, spiral stirrups are arranged around the prefabricated pier body section, and an inspection hole is reserved in the top surface of the prefabricated pier body section;
(2) And connecting and fixing the mounting seat with the embedded part through a high-strength bolt.
8. A site construction method of the fabricated type rocking pier of claim 1, comprising the steps of:
(1) Cast-in-place foundation
An upper groove and an axial center hole are reserved in the center of the bottom surface of the steel bar, and are used for mounting unbonded prestressed steel bars; reserving a rod type damper mounting hole and a support at a designated position; a lower groove is reserved in the center of the top surface and used for assembling the pier bottom section of the hollow pier body;
curing the concrete to be qualified;
(2) Drilling holes on the splicing surfaces of all the sections, fixedly inserting the holes, and staggering the positions of the dowel bars between adjacent splicing sections;
(3) The pier bottom section is assembled and fixed with the foundation
Respectively fixing the lower ends of the unbonded prestressed reinforcement and the rod-type damper with the foundation, centering and embedding the pier bottom section into a lower groove on the top surface of the foundation, anchoring the unbonded prestressed reinforcement and the solid section of the pier bottom section, and extending the upper end of the rod-type damper out of the solid section of the pier bottom section;
pouring a fiber concrete supporting seat between the outer wall of the round end of the pier bottom section and the top surface of the foundation;
(4) A steel connecting rod is hinged at the upper end of the rod type damper;
(5) Hoisting the first section of standard section to the upper part of the pier bottom section, positioning and assembling the first section of standard section and the pier bottom section through the dowel bars, and then erecting a formwork at a joint to pour concrete;
(6) Hinging a steel connecting rod hinged at the upper end of the rod type damper with an energy dissipation component of the buckling-restrained energy dissipation device on the inner wall of the first section of the standard section, wherein the steel connecting rod is arranged in a cross brace manner;
(7) Hoisting the second section of standard section to the upper part of the first section of standard section, positioning and assembling the second section of standard section and the first section of standard section through dowel bars, and then erecting a formwork at a joint to pour concrete;
(8) Hinging the energy dissipation components on the same side of the two standard sections through steel connecting rods arranged in a cross-bracing manner;
(9) Repeating the steps (7) and (8) until all the standard sections are assembled, and hinging a steel connecting rod at the upper end of the energy consumption component of the highest standard section;
(10) Assembling pier top section and highest standard section
Hoisting the pier top section to the position above the standard section, positioning and assembling through the dowel bars, and then erecting a formwork at the joint to pour concrete;
the upper end of a steel connecting rod hinged with the upper end of the energy dissipation component of the standard section is hinged with a mounting seat fixed on the inner wall of the pier top section, and the steel connecting rod is arranged in a cross brace manner;
(11) And a rubber pad is fixedly arranged on the top surface of the pier top section.
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| CN202210419670.1A CN114622483B (en) | 2022-04-20 | 2022-04-20 | Assembled swinging pier with built-in energy dissipation device and prefabricating and assembling method thereof |
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|---|---|---|---|---|
| JP2004076366A (en) * | 2002-08-15 | 2004-03-11 | Mitsubishi Heavy Ind Ltd | Foundation structure of bridge and its construction method |
| JP2016125335A (en) * | 2014-12-26 | 2016-07-11 | 宮澤 健二 | Earthquake-proof wall surface structure and earthquake-proof device connection method |
| CN206408514U (en) * | 2016-12-15 | 2017-08-15 | 同济大学 | A kind of queen post Self-resetting power consumption bridge pier of the anti-buckling steel plate wall of band |
| CN206768577U (en) * | 2017-05-09 | 2017-12-19 | 宁波大学 | A kind of damaged controllable two-columned pier |
| CN107974933A (en) * | 2017-07-06 | 2018-05-01 | 东南大学 | The precast assembly bridge pier anti-seismic structure and its construction method of built-in replaceable viscous damper and energy consumption reinforcing bar |
| CN209779950U (en) * | 2019-01-24 | 2019-12-13 | 重庆大学 | Full-swing structure system with swing columns and swing walls |
| CN114293460A (en) * | 2022-02-15 | 2022-04-08 | 中南大学 | Railway swinging hollow high pier with damping and energy-consuming devices |
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2022
- 2022-04-20 CN CN202210419670.1A patent/CN114622483B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004076366A (en) * | 2002-08-15 | 2004-03-11 | Mitsubishi Heavy Ind Ltd | Foundation structure of bridge and its construction method |
| JP2016125335A (en) * | 2014-12-26 | 2016-07-11 | 宮澤 健二 | Earthquake-proof wall surface structure and earthquake-proof device connection method |
| CN206408514U (en) * | 2016-12-15 | 2017-08-15 | 同济大学 | A kind of queen post Self-resetting power consumption bridge pier of the anti-buckling steel plate wall of band |
| CN206768577U (en) * | 2017-05-09 | 2017-12-19 | 宁波大学 | A kind of damaged controllable two-columned pier |
| CN107974933A (en) * | 2017-07-06 | 2018-05-01 | 东南大学 | The precast assembly bridge pier anti-seismic structure and its construction method of built-in replaceable viscous damper and energy consumption reinforcing bar |
| CN209779950U (en) * | 2019-01-24 | 2019-12-13 | 重庆大学 | Full-swing structure system with swing columns and swing walls |
| CN114293460A (en) * | 2022-02-15 | 2022-04-08 | 中南大学 | Railway swinging hollow high pier with damping and energy-consuming devices |
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| CN114622483A (en) | 2022-06-14 |
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