CN112030718B - Multistage swinging system for rapid connection of prefabricated spliced pier and bearing platform - Google Patents
Multistage swinging system for rapid connection of prefabricated spliced pier and bearing platform Download PDFInfo
- Publication number
- CN112030718B CN112030718B CN202010781225.0A CN202010781225A CN112030718B CN 112030718 B CN112030718 B CN 112030718B CN 202010781225 A CN202010781225 A CN 202010781225A CN 112030718 B CN112030718 B CN 112030718B
- Authority
- CN
- China
- Prior art keywords
- plate
- ball pin
- shaped energy
- disc
- pier column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 52
- 239000010959 steel Substances 0.000 claims abstract description 52
- 238000007789 sealing Methods 0.000 claims abstract description 35
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 claims abstract description 13
- 210000002435 tendon Anatomy 0.000 claims description 12
- 238000004873 anchoring Methods 0.000 claims description 8
- 238000013461 design Methods 0.000 claims description 7
- 238000009417 prefabrication Methods 0.000 claims description 5
- 238000005452 bending Methods 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000009471 action Effects 0.000 description 8
- 238000010008 shearing Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- E01D19/04—Bearings; Hinges
-
- 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
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
- E01D19/046—Spherical bearings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a multistage swinging system for quickly connecting a prefabricated assembly pier with a bearing platform, which mainly comprises the following components: the device comprises a bottom sealing plate, an upper plate, a prestressed rib, a U-shaped energy dissipation device, a lower plate and limiting angle steel. Wherein the bottom sealing plate is anchored at the bottom of the pier column; the upper disc comprises a top plate, a groove and a support plate; the lower disc comprises a ball pin, a ball pin step and a bottom plate; the groove and the ball pin are mutually nested to limit the transverse displacement of the upper disc, the first support plate is supported on the ball pin step, and the ball pin step jointly bear vertical load; the second support plate is connected with the bottom plate through a limiting angle steel to limit the relative rotation of the upper disc and the lower disc; a U-shaped energy dissipation device is arranged between the top plate and the bottom plate, and a steel backing plate is arranged between the bottom sealing plate and the upper plate if necessary so as to anchor and replace the U-shaped energy dissipation device; the lower disc is fixed on the bearing platform. Compared with the prior art, the invention increases the restoring moment through the change of the swinging fulcrum, prolongs the structural period, only needs to replace the U-shaped energy dissipater after earthquake, and is convenient for quick restoration.
Description
Technical Field
The invention relates to the fields of bridge engineering and earthquake engineering, in particular to a multistage swinging system for quickly connecting a prefabricated assembly pier with a bearing platform.
Background
The bridge is a key component of a transportation system, and has important significance in ensuring the smoothness of the bridge especially in emergency or disaster. The existing bridge earthquake-resistant design method at home and abroad mainly utilizes the ductility of the bridge pier to conduct earthquake-resistant design, the bridge pier is allowed to enter plasticity to form a plastic hinge, the bridge pier can be seriously damaged under the strong earthquake action to generate larger plastic deformation, a concrete protection layer in the plastic hinge area can be peeled off, and the bridge pier can generate permanent residual displacement after earthquake. The investigation on bridge shock damage shows that the residual displacement of the bridge pier is a main factor for measuring the repairability of the bridge after the earthquake. In an earthquake of the sakashen, more than 100 bridge piers can not be repaired and removed because the pier stud is inclined by more than 1 degree or the pier top displacement deviation exceeds 1.75% of the pier height, so that huge economic loss is caused, and huge obstruction is brought to the recovery of urban traffic functions after the earthquake.
In order to improve the use function of the post-earthquake bridge structure and quickly restore traffic, many students at home and abroad have studied bridge pier systems with restorable performances. Typical restorability techniques include the use of rocking structures, self-resetting techniques, and post-seismic quick repair techniques. In addition, researchers are looking for alternative methods of plastic reaming to reduce localized damage to the plastic reaming area, provide alternative energy dissipation mechanisms, and incorporate self-resetting techniques to reduce residual displacement, ensure normal operation after a shock, and reduce repair of post-shock piers. Although the swing pier can prolong the structural period through swinging and reduce earthquake force, the pier collides with the bearing platform in the swinging process, so that the problems of falling off of the pier bottom protective layer concrete and the like can be caused, and how to avoid the local damage of the swing pier is also a great research difficulty.
In recent years, along with the development of concrete prefabrication industry and assembly technology, prefabricated segment spliced piers are increasingly widely applied, and the site construction efficiency and the component quality are greatly improved. Although the prefabrication assembly shortens the site construction time, a series of works are still carried out on site, such as wet connection of a prefabrication section and a bearing platform, tensioning of a prestressed tendon and grouting of a conduit, and a certain time is required for forming strength of the wet connection section and grouting. In addition, the anchoring condition of the prestressed tendons cannot be checked after the prestressed tendons are anchored at the bottom of the bearing platform.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a multistage swinging system for quickly connecting a prefabricated spliced pier with a bearing platform.
The aim of the invention can be achieved by the following technical scheme:
The invention provides a multistage swinging system for quickly connecting a prefabricated assembly pier and a bearing platform, which can play roles in a longitudinal bridge direction and a transverse bridge direction at the same time.
The invention provides a multistage swinging system for quickly connecting a prefabricated assembly pier with a bearing platform, which mainly comprises a bottom sealing plate, an upper plate, prestressed tendons, a U-shaped energy dissipater, a lower plate and limiting angle steel; the bottom sealing plate is anchored at the bottom of the pier column; the bottom sealing plate and the upper disc are directly welded, or a steel backing plate is arranged between the bottom sealing plate and the upper disc, and the bottom sealing plate and the upper disc are welded through the steel backing plate; a U-shaped energy dissipation device is arranged between the upper disc and the lower disc and is connected with the upper disc and the lower disc through bolts; a limiting angle steel is further arranged between the upper disc and the lower disc, and the limiting angle steel is connected with the upper disc and the lower disc through bolts; the lower disc is fixed on the bearing platform.
In one embodiment of the invention, shear nails are arranged on the bottom sealing plate, and the bottom sealing plate is anchored at the bottom of the pier column through the shear nails.
In one embodiment of the invention, the bottom closure plate is required to provide sufficient shear pins to ensure anchorage between the bottom closure plate and the pier column based on the principle of capacity protection due to the need to transfer a large load from the pier column.
In the invention, the upper disc comprises a top plate, a first support plate and a second support plate; the first support plate is positioned at the center position below the top plate, and a groove is formed in the middle of the first support plate in a surrounding mode; the second support plate is positioned outside the first support plate; the first support plates and the second support plates are distributed from the center of the pier column from the near to the far, the corners of the support plates are made into chamfer angles, and the support plates are of a central symmetrical structure; the lower disc comprises a ball pin, a ball pin step and a bottom plate; the end part of the ball pin is a hemisphere, the ball pin is positioned at the center of the bottom plate, and the size of the ball pin is matched with the size of the groove; ball pin steps are arranged around the ball pins, and the first support plate is located above the ball pin steps.
In one embodiment of the invention, the groove and ball pin nest with each other such that lateral displacement of the upper disc is limited; the first support plate is supported on the ball pin step, so that the ball pin and the ball pin step jointly bear vertical load; the second support plate is connected with the bottom plate through the limiting angle steel and fixed through bolts, so that relative rotation between the upper disc and the lower disc is limited.
The strength design of the limiting angle steel can limit the relative rotation between the upper disc and the lower disc under the normal use condition, cannot be oversized on the one hand, and can be damaged in small earthquake, so that a swinging structure is formed, and earthquake force is reduced.
In one embodiment of the invention, a connecting plate is arranged on the top plate through a bolt, the connecting plate is connected with one side of the U-shaped energy dissipation device through a bolt, the other side of the U-shaped energy dissipation device is connected with another connecting plate through a bolt, and the connecting plate is fixed on the bottom plate through a bolt; the distance between the U-shaped energy dissipater and the center of the pier column is larger than the half width of the pier column, or the distance between the U-shaped energy dissipater and the center of the pier column is larger than the half width of the steel backing plate.
In one embodiment of the invention, when the distance between the U-shaped energy dissipater and the center of the pier column exceeds the width of half of the pier column, the top plate of the upper disc is directly welded with the bottom sealing plate.
In one embodiment of the invention, when the distance between the U-shaped energy dissipater and the center of the pier column is smaller than half of the width of the pier column, a steel backing plate is arranged between the top plate and the bottom sealing plate; the width of the steel backing plate is smaller than the distance between the two U-shaped energy dissipaters, so that a space is reserved between the bottom sealing plate and the upper plate for anchoring and replacing the U-shaped energy dissipaters; the width of the steel backing plate determines the area of the welding seam, and the shearing resistance of the welding seam of the area of the welding seam is ensured to be larger than the actual shearing force.
In one embodiment of the invention, two sides of the U-shaped energy dissipater are respectively connected with one connecting plate, the two connecting plates are respectively connected with the upper disc and the lower disc through bolts, and energy is dissipated through shearing dislocation and pulling and pressing between the steel plates, so that the U-shaped energy dissipater has the advantages of early yield, excellent deformability and stable energy dissipation capability, and can be replaced after earthquake. Based on the principle of capability protection, the anchoring strength of the U-shaped energy dissipater, the upper disc and the lower disc is higher than the maximum earthquake force requirement.
In one embodiment of the invention, the multi-stage rocking system further comprises a prestressed tendon, one end of the prestressed tendon is anchored at the top of the pier column, and the other end of the prestressed tendon is finally anchored on the bottom plate of the lower plate through the pier column, the bottom sealing plate, the steel backing plate, the top plate of the upper plate and the bottom plate of the lower plate.
In one embodiment of the invention, when the multistage swinging system is small in earthquake, a bolt between the second support plate and the limiting angle steel is damaged, the first support plate is connected with the ball pin step to form a first fulcrum, and the multistage swinging system swings by taking the first fulcrum as the center; when the multistage swinging system is in large earthquake, the first supporting point is out of the air, the second supporting plate is connected with the bottom plate to form a second supporting point, and the multistage swinging system swings by taking the second supporting point as the center; when the multistage swinging system is in an earthquake, the prestressed tendons are in an elastic state, and the U-shaped energy dissipater dissipates earthquake energy.
In one embodiment of the invention, the number of the support plates of the multi-stage swing system can be increased, and the support plates are distributed from near to far from the center of the pier column to form the fulcrums of the multi-stage swing system in earthquake so as to form multi-stage swing.
According to the invention, the distance between the upper disc support plate and the lower disc bottom plate is determined according to the vertical displacement of the support plate when the last fulcrum rotates to a design rotation angle except that the first support plate is in close contact with the ball pin step.
Under normal use conditions, the ball pin of the lower disc and the steps thereof bear vertical loads together. The ball pin of the lower disc can limit the transverse displacement of the groove of the upper disc, and the shearing resistance function is achieved. Meanwhile, the limiting angle steel can limit the relative rotation between the upper disc and the lower disc.
Under the action of an earthquake, the connecting bolts of the limiting angle steel and the second support plate are sheared, as shown in fig. 8, and when the earthquake grade is low, the upper disc rotates by taking the first supporting point as the center; as shown in fig. 9, when the seismic level is higher, the structural rotation angle continues to be increased until the second support plate rotates around the second support point, and the first support point is out of the air, so that the restoring force arm is increased. According to different earthquake fortification grades, the number of supporting points of the swinging system can be adjusted through the number of upper disc supporting plates, so that multistage swinging is formed. In order to prevent the corner of the upper plate support plate from colliding with the lower plate in the swinging process, the corner of the support plate should be made into a chamfer form. Under the action of earthquake, the U-shaped energy dissipater dissipates energy, and the prestress rib is in an elastic state to provide restoring force.
After an earthquake occurs, the damage is mainly concentrated on the energy consumption device, the structural main body is not damaged, and the energy consumption device is only required to be replaced after the earthquake. Among the various energy consumers, the U-shaped energy consumers are attracting attention for their excellent deformability and stable and reliable hysteretic energy consumption capability. The U-shaped energy dissipater is formed by bending a flat steel plate into a U shape, welding the flat steel plate end to end into a closed loop, and dissipating energy through plastic deformation of the steel plate. The limiting angle steel is a fusing device, the upper disc and the lower disc are connected under the action of using load, the limiting angle steel and the connecting bolt are fused under the action of earthquake, and the period is prolonged and the earthquake force is dissipated through swinging.
The invention adopts the connecting device suitable for the prefabrication bridge pier and the bearing platform, stretches and anchors the prestressed tendons on the connecting device in advance in a factory, and only needs to simply connect the connecting device with the bearing platform on site, thereby having great convenience and time cost advantages.
The multistage swinging system can realize the rapid connection between the prefabricated pier and the bearing platform, and further reduce the workload of a construction site. When an earthquake occurs, the swinging system rotates with different supporting points along with the increase of the rotation angle, the restoring moment is increased, the structure period is prolonged, and meanwhile, the energy dissipater is arranged to dissipate the earthquake energy and is provided with the prestress rib to achieve the function of self-resetting.
Compared with the prior art, the invention has the following advantages:
1. The invention provides the concept of the multistage swinging system for the first time, through the change of the swinging supporting point, the structure period can be prolonged, the earthquake response can be reduced, and the distance of the swinging supporting point can be increased during the major earthquake, so that the restoring force arm can be increased, and the effects of improving the horizontal load bearing capacity and the energy consumption capacity can be achieved.
2. The multistage swinging system provided by the invention can be assembled with the prefabricated bridge pier in a factory, the prestressed tendons are tensioned, and only the bottom plate of the multistage swinging system is required to be connected with the bearing platform through bolts on site, so that the processes of tensioning and grouting the prestressed tendons and wet connection of the prefabricated sections and the bearing platform in the traditional construction process of the prefabricated bridge pier are omitted, the on-site installation difficulty and the time consumption are greatly reduced, and great convenience and time benefit are realized.
3. The U-shaped energy dissipater has excellent deformability and stable and reliable hysteresis energy dissipation capability, effectively reduces earthquake response of the structure, and reduces impact force during fulcrum switching.
4. The multistage swing system is made of steel, so that the local damage of the bottom of the pier column caused by collision impact force during swing can be avoided; the multistage swinging system can replace a plastic hinge of a traditional ductile pier, and can effectively reduce the damage of the bottom of the pier column; and the device has restorability, and only the U-shaped energy dissipater needs to be replaced after the earthquake, so that the quick restoration and normal operation of the pier post after the earthquake are ensured.
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 cross-sectional view of the invention A-A;
FIG. 4 is a schematic view of a section B-B of the present invention;
FIG. 5 is a schematic diagram of a front view of a U-shaped energy consumer;
FIG. 6 is a schematic side view of a U-shaped energy consumer;
FIG. 7 is a schematic top view of a U-shaped energy consumer;
FIG. 8 is a schematic diagram of a small-to-medium-amplitude multi-stage rocking system motion;
Fig. 9 is a schematic diagram of a motion of a large-epicenter multi-stage rocking system.
The marks in the figure are as follows: the novel energy-saving steel plate comprises a pier column 1, a shear pin 2, a bottom sealing plate 3, a steel backing plate 4, a top plate 5, a prestress rib 6, a bolt 7, a connecting plate 8, an energy-saving device 9U, a bottom plate 10, a limiting angle steel 11, an anchor bolt 12, a bearing platform 13, a top plate 14, a groove 15, a first support plate 16, a second support plate 17, a ball pin 18, a ball pin step 19, a bottom plate 20, a first support point 21 and a second support point 22.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Examples
The present embodiment provides a multi-stage rocking system that can function in both the longitudinal and transverse directions.
As shown in fig. 1 to 9, this embodiment provides a multistage swinging system for rapid connection between a prefabricated assembly pier and a bearing platform, the multistage swinging system mainly includes: the device comprises a bottom sealing plate 3, an upper plate 5, a prestressed rib 6, a U-shaped energy dissipation device 9, a lower plate 10 and limiting angle steel 11. In the multistage swing system, a bottom sealing plate 3 is anchored at the bottom of a pier column 1; the bottom sealing plate 3 and the upper disc 5 are directly welded, or a steel base plate 4 is arranged between the bottom sealing plate 3 and the upper disc 5, and the bottom sealing plate 3 and the upper disc 5 are welded through the steel base plate 4; a U-shaped energy dissipation device 9,U and a U-shaped energy dissipation device 9 are arranged between the upper disc 5 and the lower disc 10 and are connected with the upper disc 5 and the lower disc 10 through bolts 7; a limiting angle steel 11 is further arranged between the upper disc 5 and the lower disc 10, and the limiting angle steel 11 is connected with the upper disc 5 and the lower disc 10 through bolts 7; the lower tray 10 is fixed on a bearing platform 13.
The upper disc 5 in this embodiment comprises a top plate 14, a groove 15, a first support plate 16 and a second support plate 17; the groove 15 is positioned at the center of the top plate 14; the first support plate 16 is positioned at the center below the top plate 14, the bottom is of a groove structure, and the first support plate 16 forms a groove 15; the second support plate 17 is positioned outside the first support plate 16; the first support plates 16 and the second support plates 17 are distributed from the center of the pier column from the near to the far, the corner parts of the support plates are made into chamfer angles, and the support plates are of a central symmetrical structure; the lower disc 10 comprises a ball pin 18, a ball pin step 19 and a bottom plate 20; the end of the ball pin 18 is a hemisphere, which is positioned in the center of the bottom plate 20, and the size of the ball pin 18 is matched with the size of the groove 15; ball pin step 19 is set around ball pin 18, ball pin step 19 is located under first support plate 16.
The grooves 15 and the ball pins 18 are nested with each other in this embodiment so that the lateral displacement of the upper disc 5 is limited; the first support plate 16 is supported on the ball pin step 19, so that the ball pin 18 and the ball pin step 19 jointly bear vertical load; the second support plate 17 is connected with the bottom plate 20 through the limiting angle steel 11 and fixed through the bolts 7, so that the relative rotation between the upper disc 5 and the lower disc 10 is limited.
In this embodiment, the bottom sealing plate 3 needs to transmit a larger load from the pier column 1, and enough shear nails 2 are arranged on the bottom sealing plate 3 based on the principle of capacity protection to ensure the anchoring performance between the bottom sealing plate 3 and the pier column 1.
The steel backing plate 4 in this embodiment serves to leave sufficient space between the bottom closure plate 3 and the upper disc 5 for anchoring and replacement of the U-shaped energy consumer 9. When the widths of the upper disc 5 and the lower disc 10 are larger, so that the distance between the U-shaped energy dissipater 9 and the center of the pier column 1 exceeds the width of the pier column 1, the upper disc 5 can be directly welded with the bottom sealing plate 3 without arranging the steel backing plate 4. The diameter of the steel backing plate 4 determines the area of the weld, and the diameter of the steel backing plate ensures that the shearing capacity of the weld is larger than the actual shearing force.
In this embodiment, the limiting angle 11 is used for connecting the second support plate 17 of the upper disc 5 and the lower disc 10, and the strength design of the limiting angle 11 should ensure the following two conditions: on one hand, the relative rotation between the upper disc and the lower disc under the normal use condition can be limited, on the other hand, the upper disc and the lower disc cannot be oversized, and the upper disc and the lower disc can be damaged in small earthquake, so that a swinging structure is formed, and the earthquake force is reduced.
In the embodiment, two sides of the U-shaped energy dissipation device 9 are respectively connected with one connecting plate 8, the two connecting plates 8 are respectively connected with the upper disc 5 and the lower disc 10 through bolts 7, and energy is dissipated through shearing dislocation and pulling and pressing between steel plates, so that the U-shaped energy dissipation device has the advantages of early yielding, excellent deformability and stable energy dissipation capability, and can be replaced after earthquake.
Based on the principle of capability protection, the anchoring strength of the U-shaped energy dissipater 9 and the upper disc 5 and the lower disc 10, and the anchoring strength between the lower disc 10 and the bearing platform 13 are all larger than the maximum earthquake force requirement.
The distance between the support plate of the upper tray 5 and the bottom plate 20 of the lower tray 10 is determined according to the vertical displacement of the support plate when the support plate rotates to the design rotation angle from one pivot above the upper tray 5 except that the first support plate 16 is closely contacted with the bottom plate 20.
Under normal use conditions, the pins 18 of the lower disc 10 and their pin steps 19 together bear vertical loads. The ball pin 18 of the lower disc 10 can limit the transverse displacement of the groove 15 of the upper disc 5, and plays a role in shearing resistance. Meanwhile, the limiting angle steel 11 can limit the relative rotation between the upper disc 5 and the lower disc 10.
Under the earthquake action, the connecting bolt 7 of the limiting angle steel 11 and the second support plate 17 is sheared, under the small earthquake action, the upper disc 5 rotates by taking the first supporting point 21 as the center, under the large earthquake action, the structural corner continues to be increased until the upper disc 5 rotates by taking the second supporting point 22 as the center, the first supporting point 21 is in a void state, and the restoring force arm is increased. According to different earthquake fortification grades, the number of supporting points of the swinging system can be adjusted through the number of 5 support plates of the upper plate, so that multistage swinging is formed. The U-shaped energy dissipation device 9 dissipates energy, and the prestress rib 6 is in an elastic state and provides restoring force.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments 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-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (7)
1. The utility model provides a multistage system of swaing of pier and cushion cap quick connect is assembled in prefabrication, its characterized in that, multistage system of swaing includes following component: the device comprises a bottom sealing plate (3), an upper plate (5), a U-shaped energy dissipation device (9), a lower plate (10) and limiting angle steel (11);
The bottom sealing plate (3) is anchored at the bottom of the pier column (1);
The bottom sealing plate (3) and the upper disc (5) are directly welded, or a steel base plate (4) is arranged between the bottom sealing plate (3) and the upper disc (5), and the bottom sealing plate (3) and the upper disc (5) are welded through the steel base plate (4);
A U-shaped energy dissipation device (9) is arranged between the upper disc (5) and the lower disc (10), and the U-shaped energy dissipation device (9) is connected with the upper disc (5) and the lower disc (10) through bolts (7);
A limiting angle steel (11) is further arranged between the upper disc (5) and the lower disc (10), and the limiting angle steel (11) is connected with the upper disc (5) and the lower disc (10) through bolts (7);
the lower disc (10) is fixed on the bearing platform (13);
The upper disc (5) comprises a top plate (14), a first support plate (16) and a second support plate (17);
the first support plate (16) is positioned at the center position below the top plate (14), and a groove (15) is formed in the middle of the first support plate (16);
The second support plate (17) is positioned outside the first support plate (16);
The first support plates (16) and the second support plates (17) are distributed from near to far from the center of the pier column (1) and are of central symmetry structures;
The lower disc (10) comprises a ball pin (18), a ball pin step (19) and a bottom plate (20);
The end part of the ball pin (18) is a hemisphere, the ball pin is positioned at the center of the bottom plate (20), and the size of the ball pin (18) is matched with the size of the groove (15);
ball pin steps (19) are arranged around the ball pins (18), and the ball pin steps (19) are positioned below the first support plate (16);
When the multistage swinging system is small in earthquake, the bolts (7) between the second support plates (17) and the limiting angle steel (11) can be damaged, and the first support plates (16) are connected with the ball pin steps (19) to form first supporting points (21), so that the multistage swinging system swings around the first supporting points (21);
When the multistage swinging system is in large earthquake, the first supporting point (21) is out of the air, the second supporting plate (17) is connected with the bottom plate (20) to form a second supporting point (22), and the multistage swinging system swings by taking the second supporting point (22) as the center;
when the multistage swinging system is in an earthquake, the prestressed tendons (6) are in an elastic state, and the U-shaped energy dissipater (9) dissipates earthquake energy;
The number of support plates of the multi-stage swing system is increased, the support plates are distributed from near to far from the center of the pier column (1) to form fulcrums of the multi-stage swing system in the earthquake, and multi-stage swing is formed;
The furthest distance between the fulcrum and the center of the pier column (1) is greater than the distance of the lateral offset of the gravity center of the pier column (1), and the rotating moment of the multistage swinging system is smaller than the equivalent yield bending moment of the pier column (1);
the distance between the other support plates except the first support plate (16) and the bottom plate (20) is determined according to the vertical displacement of the support plates when the last pivot rotates to the design rotation angle.
2. The multistage swinging system for quickly connecting the prefabricated spliced piers and the bearing platforms according to claim 1, wherein shear nails (2) are arranged on the bottom sealing plate (3), and the bottom sealing plate (3) is anchored at the bottom of the pier column (1) through the shear nails (2).
3. A multilevel rocking system for the rapid connection of prefabricated piers to caps according to claim 1, characterized in that the grooves (15) are mutually nested with the pins (18) so that the lateral displacement of the upper disc (5) is limited;
the first support plate (16) is supported on the ball pin step (19) so that the ball pin (18) and the ball pin step (19) jointly bear vertical load;
The second support plates (17) are connected with the bottom plate (20) through limiting angle steel (11) and fixed through bolts (7), so that relative rotation between the upper disc (5) and the lower disc (10) is limited.
4. The multistage swinging system for quickly connecting prefabricated spliced piers and bearing platforms according to claim 1, characterized in that a connecting plate (8) is arranged on a top plate (14) through a bolt (7), the connecting plate (8) is connected with one side of a U-shaped energy dissipation device (9) through the bolt (7), the other side of the U-shaped energy dissipation device (9) is connected with another connecting plate (8) through the bolt (7), and the connecting plate (8) is fixed on a bottom plate (20) through the bolt (7);
The distance between the U-shaped energy dissipater (9) and the center of the pier column (1) is larger than half of the width of the pier column (1), or the distance between the U-shaped energy dissipater (9) and the center of the pier column (1) is larger than half of the width of the steel backing plate (4).
5. The multistage swinging system for quickly connecting the prefabricated spliced piers and the bearing platforms according to claim 1, wherein when the distance between the U-shaped energy dissipater (9) and the center of the pier column (1) exceeds the half width of the pier column (1), the upper disc (5) is directly welded with the bottom sealing plate (3).
6. The multistage swinging system for quickly connecting prefabricated spliced piers and bearing platforms according to claim 1, wherein when the distance between the centers of the U-shaped energy dissipaters (9) and the pier column (1) is smaller than half of the width of the pier column (1), a steel base plate (4) is arranged between the upper plate (5) and the bottom sealing plate (3), and the width of the steel base plate (4) is smaller than the distance between the two U-shaped energy dissipaters (9), so that a space is reserved between the bottom sealing plate (3) and the upper plate (5) for anchoring and replacement of the U-shaped energy dissipaters (9).
7. The multistage swinging system for quickly connecting a prefabricated spliced pier with a bearing platform, according to claim 1, further comprising a prestressed rib (6), wherein one end of the prestressed rib (6) is anchored at the top of the pier stud (1), the other end of the prestressed rib is anchored on a lower disc (10), and the middle part of the prestressed rib penetrates through a bottom sealing plate (3), a steel base plate (4), an upper disc (5) and the lower disc (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010781225.0A CN112030718B (en) | 2020-08-06 | 2020-08-06 | Multistage swinging system for rapid connection of prefabricated spliced pier and bearing platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010781225.0A CN112030718B (en) | 2020-08-06 | 2020-08-06 | Multistage swinging system for rapid connection of prefabricated spliced pier and bearing platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112030718A CN112030718A (en) | 2020-12-04 |
| CN112030718B true CN112030718B (en) | 2024-05-31 |
Family
ID=73582514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010781225.0A Active CN112030718B (en) | 2020-08-06 | 2020-08-06 | Multistage swinging system for rapid connection of prefabricated spliced pier and bearing platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112030718B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113338434B (en) * | 2021-06-17 | 2023-01-24 | 西安建筑科技大学 | Assembled energy-consumption self-resetting column base structure and upright column connecting node |
| 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 |
| CN114481814B (en) * | 2022-01-13 | 2024-04-19 | 中船双瑞(洛阳)特种装备股份有限公司 | Reset device for supporting pier to swing |
| CN114622481B (en) * | 2022-03-31 | 2023-05-05 | 中冶集团武汉勘察研究院有限公司 | Double-column type self-resetting pier structure with buckling restrained brace and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150106097A (en) * | 2014-03-11 | 2015-09-21 | 고려개발 주식회사 | The seismic retrofit method of bridge columns using external tendons |
| CN107059599A (en) * | 2017-04-27 | 2017-08-18 | 北京市市政工程设计研究总院有限公司 | Antidetonation without bearing Self-resetting, damping cast-in-situ bridge |
| CN108103927A (en) * | 2017-12-30 | 2018-06-01 | 北京工业大学 | The recoverable full precast assembly double-layer frame Bridge Pier Structure System of function after shake |
| WO2019223294A1 (en) * | 2018-05-22 | 2019-11-28 | 扬州大学 | Novel shock absorption self-resetting energy-consuming inhaul cable supporting device |
| CN212452260U (en) * | 2020-08-06 | 2021-02-02 | 同济大学 | Multistage swing system for quickly connecting prefabricated assembled pier and bearing platform |
-
2020
- 2020-08-06 CN CN202010781225.0A patent/CN112030718B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150106097A (en) * | 2014-03-11 | 2015-09-21 | 고려개발 주식회사 | The seismic retrofit method of bridge columns using external tendons |
| CN107059599A (en) * | 2017-04-27 | 2017-08-18 | 北京市市政工程设计研究总院有限公司 | Antidetonation without bearing Self-resetting, damping cast-in-situ bridge |
| CN108103927A (en) * | 2017-12-30 | 2018-06-01 | 北京工业大学 | The recoverable full precast assembly double-layer frame Bridge Pier Structure System of function after shake |
| WO2019223294A1 (en) * | 2018-05-22 | 2019-11-28 | 扬州大学 | Novel shock absorption self-resetting energy-consuming inhaul cable supporting device |
| CN212452260U (en) * | 2020-08-06 | 2021-02-02 | 同济大学 | Multistage swing system for quickly connecting prefabricated assembled pier and bearing platform |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112030718A (en) | 2020-12-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112030718B (en) | Multistage swinging system for rapid connection of prefabricated spliced pier and bearing platform | |
| Mar | Design examples using mode shaping spines for frame and wall buildings | |
| CN112049243A (en) | Self-resetting steel frame beam-column connecting joint with transition connecting piece and construction method | |
| CN113404160A (en) | Self-resetting assembly type concrete beam column energy consumption connecting node and construction method | |
| CN111764267A (en) | Swing type self-resetting support | |
| CN111021232A (en) | Double-column type self-resetting concrete filled steel tube pier with replaceable energy-consuming corrugated steel connecting beam | |
| CN111395574A (en) | Assembled self-resetting energy dissipation shear wall | |
| CN111455830A (en) | Large cantilever cover beam type bridge pier and construction method thereof | |
| CN114293460B (en) | Railway swinging hollow high pier with damping and energy-consuming devices | |
| CN212452260U (en) | Multistage swing system for quickly connecting prefabricated assembled pier and bearing platform | |
| CN113668368B (en) | Plastic hinge area enlarged section assembled type swing pier and construction method thereof | |
| CN114775410A (en) | Limiting self-resetting railway swinging hollow pier with built-in corrugated web damper | |
| CN215482258U (en) | Multi-damping system for segment-assembled single-column pier separated UHPC swinging bearing platform | |
| CN113605218B (en) | Swing self-reset rigid frame bridge double-limb thin-wall pier | |
| CN111021233A (en) | Double-column type concrete-filled steel tube pier with replaceable energy-consuming corrugated steel connecting beam and construction method | |
| CN212478090U (en) | Self-resetting steel frame beam-column connecting joint provided with transition connecting piece | |
| CN211947909U (en) | Double-column type self-resetting concrete filled steel tube pier with replaceable energy-consuming corrugated steel connecting beam | |
| CN111764268A (en) | Self-resetting support | |
| CN113186810A (en) | Connecting hinge suitable for prefabricated assembled bridge pier | |
| CN111455833A (en) | Self-resetting prefabricated assembled pier and construction method thereof | |
| CN212656105U (en) | Self-resetting prefabricated assembled pier | |
| CN114232464B (en) | High damping rubber-hourglass section steel support combined energy consumption structure and method | |
| CN212656108U (en) | Self-resetting support | |
| CN215887896U (en) | Connecting hinge suitable for prefabricated assembled bridge pier | |
| CN215802242U (en) | Self-resetting assembly type concrete beam column energy consumption connecting node |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |