CN114657861B - Bridge girder striking loss stopping device with striking energy consumption and transverse displacement prevention functions - Google Patents
Bridge girder striking loss stopping device with striking energy consumption and transverse displacement prevention functions Download PDFInfo
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- CN114657861B CN114657861B CN202210400695.7A CN202210400695A CN114657861B CN 114657861 B CN114657861 B CN 114657861B CN 202210400695 A CN202210400695 A CN 202210400695A CN 114657861 B CN114657861 B CN 114657861B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 52
- 238000005265 energy consumption Methods 0.000 title claims abstract description 43
- 230000002265 prevention Effects 0.000 title claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 160
- 239000010959 steel Substances 0.000 claims abstract description 160
- 230000021715 photosynthesis, light harvesting Effects 0.000 claims abstract description 33
- 238000004873 anchoring Methods 0.000 claims abstract description 26
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 238000003491 array Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
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- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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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
- E01D1/00—Bridges in general
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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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- 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 relates to a bridge girder impact damage stopping device with impact energy consumption and transverse anti-displacement, and belongs to the field of bridge protection design. The device comprises impact energy consumption devices on two sides of a main beam, impact energy consumption devices on the bottom of the main beam and transverse anti-displacement devices arranged on the cover beam and the bottom of the main beam. The impact energy dissipation device comprises a rubber baffle, an anchoring thick steel plate, a collision thick steel plate, a variable-section steel pipe and a mild steel-lead combined member. The transverse anti-displacement device is fixed at the inner side of the cover beam and the bottom of the main beam and arranged at two ends of the main beam, and comprises a steel rod, a stop plate, an electric hydraulic telescopic cylinder, an oil pump switch, a hexagonal anchor block, a trapezoidal anchor block and a displacement sensor. Under the collision effect of the ultrahigh vehicle, deformation energy consumption of the mild steel-lead combined member is realized, meanwhile, the oil pump switch is controlled through the displacement sensor, and the electric hydraulic telescopic cylinders on two sides are connected to extend or shorten the oil pump switch, so that the steel rod generates a resistance force opposite to the impact force to the main girder, and the main girder is prevented from being transversely shifted due to the overlarge impact force.
Description
Technical Field
The invention relates to an energy consumption device, in particular to a bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention, and belongs to the field of bridge protection design.
Background
With the continuous development of society, urban population of China is becoming dense, and the number of motor vehicles is increasing. In order to relieve traffic pressure and increase the utilization rate of urban space resources, the development of three-dimensional traffic is actively promoted. New traffic accidents are also brought about by the appearance of overpasses, pedestrian overpasses, expressway bridges and the like. Many original designs change into a motor vehicle lane due to large traffic pressure after the under-bridge is a non-motor vehicle lane, so that the under-bridge clearance is insufficient. In the reconstruction process of the underbridge road, most of the underbridge roads adopt a milling and paving method, so that the clearance under the local bridge is further reduced. In addition, the design of the time limit height mark is not reasonable and the driver's mind of getting lucky is increased, so that the accident that the vehicle hits the main beam frequently occurs. When the impact force exceeds the design impact force, the support seat may be sheared, concrete destroyed, reinforcing steel exposed, the girder may shift and even fracture and collapse. Each collision can cause damage to the bridge structure, shortened service life, reduced safety and shock resistance.
Traffic accidents of ultrahigh vehicles striking bridges endanger the safety of drivers and pedestrians, and traffic interruption also causes a great deal of waste of manpower, material resources and financial resources. Therefore, reasonable determination of the anti-collision design standard and arrangement of matched safety facilities are urgent and necessary, and the method has important practical significance. The invention relates to a bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention, which not only can achieve the energy consumption effect when a bridge is impacted at a small speed and with small tonnage, but also can achieve the effect of preventing girder falling during extreme collision of an overweight and superhigh vehicle, avoids catastrophic consequences such as vehicle death, traffic artery interruption and the like, and simultaneously reduces economic loss caused by accidents.
Disclosure of Invention
Based on the defects, the invention provides a bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention, which is used for solving the problems that an ultrahigh vehicle impacts a girder and the girder is transversely displaced after the impact.
In order to solve the technical problems, the invention adopts the following technical scheme:
the bridge girder impact damage stopping device with the impact energy consumption and the transverse displacement prevention function comprises a bridge girder, an impact energy consumption device and a transverse displacement prevention device, wherein a cover girder at the top of a bridge pier supports the girder through a support;
the impact energy dissipation devices are fixed at the bottom and the left and right sides of the main beam and comprise rubber baffles, impact thick steel plates, anchoring thick steel plates, variable-section steel pipes, mild steel pipes and lead columns; one end of the variable cross-section steel pipe and one end of the mild steel pipe are welded with the collision thick steel plate, and the other end of the variable cross-section steel pipe and the mild steel pipe are welded with the anchoring thick steel plate and are sealed; the prefabricated lead column is inserted into the soft steel pipe; the variable cross-section steel pipe is sleeved outside the soft steel pipe; in the impact energy dissipation devices on the left side and the right side of the main beam, rubber baffles are arranged between the impact thick steel plate and the top of the anchoring thick steel plate, and the rubber baffles, the anchoring thick steel plate and the main beam are stuck into a whole;
the transverse anti-displacement device is fixed between the inner side of the cover beam and the bottom of the main beam and comprises a hexagonal anchor block, a trapezoidal anchor block, a steel rod, an electric hydraulic telescopic cylinder, a stop plate, an oil pump switch, an electric wire and a displacement sensor; the hexagonal anchor block is anchored at the center of the bottom of the main beam through a bolt; the two trapezoidal anchor blocks are anchored at two ends of the bottom of the inner side of the bent cap through bolts respectively; the upper ends of the two steel rods are anchored into a whole with the stop plate in the hexagonal anchor block through the fastening nuts, and the lower ends of the two steel rods are anchored into a whole with the trapezoidal anchor block through the fastening nuts; the upper end of the electric hydraulic telescopic cylinder is welded with the stop plate into a whole, and the lower end of the electric hydraulic telescopic cylinder is welded with the hexagonal anchor block into a whole; the oil pump switch is stuck to the inner top plate of the hexagonal anchor block and is connected with the displacement sensors at the left side, the right side and the bottom of the main beam and the electric hydraulic telescopic cylinder through wires.
Further, the displacement sensor is stuck to the bottom edge of the anchoring thick steel plate; the block terminal is provided with in the pier bottom, block terminal and wire connection, and block terminal inserts commercial power or stand-by power supply.
Further, a plurality of small holes are formed in the soft steel tube along the circumferential direction, the small holes are arranged in eleven rows, and twelve annular arrays in each row are distributed; the rubber baffle, the anchoring thick steel plate and the main beam are adhered into a whole by using a cold vulcanizing agent SK 313.
Further, the hexagonal anchor blocks and the trapezoidal anchor blocks are steel anchor boxes and are anchored at the center of the bottom of the main beam and the inner side of the capping beam through bolts.
Further, the height of the impact energy dissipation devices on the left side and the right side of the outer part of the main beam is not more than 1/4 of the height of the main beam.
Furthermore, the impact energy dissipation device is formed by splicing a plurality of groups of main beams, is beneficial to convenient replacement and maintenance after being impacted, and simultaneously saves materials.
Further, the lead column in the impact energy dissipation device is a recrystallized substance, and when the impact is suffered, the lead column in the mild steel tube is extruded from the small hole and generates plastic flow to consume energy.
Further, the variable cross-section steel pipe is formed by a plurality of semi-circles with the radius of 3cm at intervals of 3cm and is used for sealing the mild steel pipe and preventing lead columns in the mild steel pipe from being polluted after being extruded.
Furthermore, the soft steel tube adopts steel with the yield strength of 100MPa-200MPa, so that the stress deformation is larger, and the energy consumption is increased.
The working principle is as follows:
when the ultrahigh vehicle impacts the two sides of the main beam and impacts the energy dissipation devices, the impact thick steel plate is subjected to impact force, so that the variable-section steel pipe is extruded, the soft steel pipe and the lead column in the variable-section steel pipe are compressed due to the stress and are transversely expanded and deformed, the lead column in the soft steel pipe is extruded from the small hole to perform plastic flow, and finally, the variable-section steel pipe, the soft steel pipe and the lead column all play a role in impact energy dissipation;
when the ultrahigh vehicle impacts the bottom of the main beam to impact the energy dissipation device, the thick steel plate is impacted to move to the inner side of the main beam, the variable-section steel pipe is sheared and deformed, the inner side is compressed, and the outer side is stretched; the soft steel pipe is similarly bent and deformed, the lead column is extruded from the small hole to perform plastic flow due to deformation, and finally the variable cross section steel pipe, the soft steel pipe and the lead column all play a role in collision energy consumption;
when the collision vehicle collides with the main beam from the right side, the vehicle speed is small, the tonnage is small, the impact force on the main beam is small, and the impact energy can be counteracted through the collision energy dissipation device, so that the main beam is prevented from being damaged; when the collision vehicle is large in speed and large in tonnage, the impact force on the main beam is large, the energy consumption device is firstly impacted to consume energy, the light is insufficient to completely offset the impact force by the energy consumption device, at the moment, when the displacement of the collision thick steel plate is 1/2 of the designed collision length, the displacement sensor is used for opening an oil pump switch to control the right electric hydraulic telescopic cylinder to extend, so that the right steel rod generates left pulling force, and conversely, the hexagonal anchor block receives right pushing force, and then the hexagonal anchor block transmits the right pushing force to the main beam; meanwhile, the left electric hydraulic telescopic cylinder is controlled to be shortened, so that left steel rods generate left pressure, and opposite, the hexagonal anchor blocks are subjected to right thrust, and the hexagonal anchor blocks transmit the right thrust to the main beams; when the vehicle impacts the main beam from the left side, the principle is the same; and finally, the two steel rods simultaneously generate resistance force opposite to the impact force for the main beam, and meanwhile, the main beam is prevented from being laterally shifted due to overlarge impact force by virtue of the transverse limit function of the stop blocks on the support and the beam cover, so that the damage such as beam falling and the like is avoided.
Compared with the prior art, the invention has the following technical effects:
the beneficial effects of adopting above-mentioned technical scheme to produce lie in: under the effect of the ultrahigh vehicle impact girder, the bridge girder impact damage stopping device consumes impact energy through the combined action of the variable-section steel pipe, the soft steel pipe and the lead in the impact energy consumption device. When the impact energy consumption device deforms greatly, the impact energy is large, serious damage such as beam falling and beam breakage can be caused, in order to prevent the main beam from generating transverse displacement, the displacement sensor is used for controlling the oil pump switch, so that the electric hydraulic telescopic cylinder is controlled to extend or shorten, impact force is transmitted to the capping beam and the bridge pier through the steel rod, and the transverse limiting function is exerted by the support and the capping beam stop block. The invention has simple structure and low cost, and can greatly improve the impact resistance of the girder and increase the safety of the bridge.
Drawings
FIG. 1 is a side view of a bridge girder impact loss prevention device with impact energy consumption and transverse anti-displacement functions according to the present invention;
FIG. 2 is a cross-sectional view of a bridge girder impact loss prevention device with both impact energy consumption and lateral displacement prevention according to the present invention;
FIG. 3 is a partial construction view of a bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to the present invention;
FIG. 4 is a front view of the left and right side impact energy consuming devices of the ultrahigh vehicle impact main beam of the present invention;
FIG. 5 is a front view of the impact energy consuming device on the left and right sides of the main beam of the present invention;
FIG. 6 is a front view of the main beam bottom impact energy dissipation device of the present invention;
FIG. 7 is a three-dimensional view of the main beam bottom impact energy dissipation device configuration of the present invention;
FIG. 8 is an exploded view of the main beam outsole impact energy dissipating device of the present invention;
FIG. 9 is a partial construction view of the lateral anti-displacement device of the present invention;
FIG. 10 is a partially constructed three-dimensional view of the lateral anti-displacement device of the present invention;
FIG. 11 is a three-dimensional view of a hexagonal anchor block of the present invention;
FIG. 12 is a three-dimensional view of a trapezoidal anchor block of the present invention;
in the figure: 1-a main beam; 2-a rubber baffle; 3-colliding with the thick steel plate; 4-anchoring the thick steel plate; 5-a variable cross-section steel pipe; 6-soft steel pipes; 7-lead columns; 8-hexagonal anchor blocks; 9-supporting seats; 10-steel bars; 11-steel bars; 12-a capping beam; 13-pier; 14-trapezoid anchor blocks; 15-tightening the nut; 16-bolts; 17-an electro-hydraulic telescopic cylinder; 18-an electro-hydraulic telescopic cylinder; 19-a stop plate; 20-an oil pump switch; 21-an electric wire; 22-a distribution box; a 23-displacement sensor; 24-stop blocks; 25-superhigh vehicle.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to FIGS. 1-12.
As shown in fig. 1-10, the bridge girder impact damage stopping device with the impact energy consumption and the transverse displacement prevention function comprises a cover beam 12 at the top of a pier 13 for supporting a girder 1 through a support 9, and further comprises an impact energy consumption device and a transverse displacement prevention device.
As shown in fig. 1 to 8, the impact energy dissipation devices are fixed at the bottom and left and right sides of the main beam 1, and include a rubber baffle plate 2, a collision steel plate 3, an anchoring steel plate 4, a variable cross-section steel pipe 5, a mild steel pipe 6 and a lead column 7. One end of the variable cross-section steel pipe 5 and one end of the mild steel pipe 6 are welded with the collision thick steel plate 3, and the other end is welded with the anchoring thick steel plate 4 and is sealed. The prefabricated lead column 7 is inserted into the mild steel pipe 6, the lead column 7 is a recrystallized substance, and when collision is suffered, the lead column 7 in the mild steel pipe 6 is extruded from the small hole and generates plastic flow to consume energy. The variable cross-section steel pipe 5 is sleeved outside the soft steel pipe 6. In the impact energy dissipation devices on the left side and the right side of the girder 1, a rubber baffle plate 2 is further arranged between the tops of the impact thick steel plate 3 and the anchoring thick steel plate 4, and the rubber baffle plate 2, the anchoring thick steel plate 4 and the girder 1 are adhered into a whole. The soft steel tube 6 is provided with a plurality of small holes along the circumferential direction, the small holes are arranged in eleven rows, and twelve annular arrays in each row are distributed. The rubber baffle 2, the anchoring thick steel plate 4 and the main beam 1 are adhered into a whole by using a cold vulcanizing agent SK 313.
As shown in fig. 9-12, the lateral anti-displacement device is fixed between the inner side of the capping beam 12 and the bottom of the main beam 1, and comprises a hexagonal anchor block 8, a trapezoidal anchor block 14, steel rods 10 and 11, electro-hydraulic telescopic cylinders 17 and 18, a stop plate 19, an oil pump switch 20, an electric wire 21 and a displacement sensor 23. The hexagonal anchor block 8 is anchored at the bottom center of the main beam 1 through a bolt 16. Two trapezoidal anchor blocks 14 are respectively anchored at two ends of the inner bottom of the bent cap 12 through bolts 16. The upper ends of the two steel rods 10 and 11 are anchored with a stop plate 19 in the hexagonal anchor block 8 through a fastening nut 15, and the lower ends are anchored with a trapezoidal anchor block 14 through the fastening nut 15. The upper ends of the electro-hydraulic telescopic cylinders 17 and 18 are welded with the stop plate 19 into a whole, and the lower ends of the electro-hydraulic telescopic cylinders are welded with the hexagonal anchor block 8 into a whole. The oil pump switch 20 is stuck on the inner top plate of the hexagonal anchor block 8, and is connected with the displacement sensors 23 at the left side, the right side and the bottom of the main beam 1 and the electro-hydraulic telescopic cylinders 17 and 18 through electric wires 21.
The electro-hydraulic telescopic cylinders 17 and 18 are linear transmission mechanisms, and utilize a motor, a gear set and a connecting rod as driving components, and drive a lead screw to rotate by power generated by the motor so as to facilitate the telescopic rod to extend and retract in a linear direction. Thereby the stop plate 19 connected with the telescopic rod has the pushing or retracting function and gives a reverse force to the steel rods 10 and 11.
Wherein, the hexagonal anchor block 8 and the trapezoidal anchor block 14 are reserved with circular pore canals with the same diameter as the steel bars 10 and 11, and are smeared with lubricating oil, so that the friction resistance is reduced. In addition, elastic rubber washers are arranged between the fastening nuts 15, the stop plates 19 and the trapezoid anchor blocks 14, so that the contact area is increased, and looseness is prevented. In addition, the anchoring thick steel plate, the collision thick steel plate, the variable-section steel pipe and the steel rod are made of stainless steel materials, and the surfaces of the anchoring thick steel plate, the collision thick steel plate, the variable-section steel pipe and the steel rod are subjected to corrosion-resistant treatment, so that the durability of the structure is improved.
As shown in fig. 11-12, the hexagonal anchor blocks 8 and the trapezoidal anchor blocks 14 are steel anchor boxes and are anchored at the bottom center of the main beam 1 and inside the capping beam 12 by bolts 16.
As shown in fig. 2-3,5-6, the displacement sensor 23 is attached to the bottom edge of the anchor plate 4. The block terminal 22 is arranged at the bottom of the pier 13, the block terminal 22 is connected with the electric wire 21, and the block terminal 22 is connected with alternating current commercial power. The wire is coated with wear-resistant and corrosion-resistant rubber on the outer side of the copper wire. The anchoring thick steel plate, the collision thick steel plate, the variable cross-section steel pipe and the steel rod are made of stainless steel, and the surface is subjected to corrosion prevention treatment, so that the durability of the structure is improved.
In this embodiment, specific parameters are set as follows:
the height of the impact energy dissipation devices on the left side and the right side of the outer part of the main beam 1 is not more than 1/4 of the height of the main beam 1. And the impact energy dissipation devices are spliced on the main beam 1 in a plurality of groups, so that the impact energy dissipation devices are convenient to replace and maintain after being impacted, and meanwhile, the materials are saved. The variable cross-section steel pipe 5 is formed by a plurality of semi-circles with the radius of 3cm and the interval of 3cm and is used for sealing the soft steel pipe 6 and preventing the lead column 7 in the soft steel pipe 6 from being polluted after being extruded. The steel pipe 6 adopts steel with the yield strength of 100MPa-200MPa, so that the stress deformation is large, and the energy consumption is increased.
The rubber baffle is a cuboid with the length of 40cm and the width of 35cm, and the thickness of 5-15mm, and is adhered to the anchoring thick steel plate 4 and the girder 1 for preventing rainwater from penetrating the rusted steel plate. The anchoring thick steel plate 4 is a cuboid with the length of 35cm and the width of 30cm and the thickness of 10-15mm, and is anchored with the main beam 1 through bolts 16. The bolts 16 are 22mm in diameter and 50mm in length, and are distributed in two rows and two columns in total. The collision thick steel plate 3 is a cuboid with the length of 35cm and the width of 30cm, and the thickness is 15-20mm. The variable cross-section steel pipe 5 is 40cm long, 10mm thick, 24cm outside diameter and 18cm inside diameter. The inner diameter of the soft steel pipe 6 is 16cm, the wall thickness is 5mm, and the pipe wall is provided with small holes with the diameter of 4mm, which are distributed in 11 rows of 12 annular arrays.
The impact energy dissipation devices at the beam bottom are fixed at the left and right sides of the outer bottom of the main beam, and are not affected by rainwater, so that the rubber baffle plate 2 is not needed. The anchoring thick steel plate 4 and the collision thick steel plate 3 are rectangular solids with the length of 25cm and the width of 20cm, and the thickness is 10-15mm. The variable cross-section steel pipe 5 and the mild steel pipe 6 are 30cm long, and the clearance under the bridge is limited, so that the length of the device is properly reduced. The other dimensions, the anchoring mode and the welding mode are the same as those of the impact energy dissipation devices on the two sides of the main beam.
In the transverse anti-displacement device, the longest edge of the hexagonal anchor block is 2m, the height is 0.5m, the width is 1m, the hexagonal anchor block is fixed at the center of the bottom of the main beam 1 through bolts 16, the diameter of each bolt 16 is 28mm, the length of each bolt is 60mm, and 45 bolts are uniformly distributed in four rows and nine columns. The trapezoid anchor blocks 14 are 1m at the bottom, 0.5m at the top, 1m at the height and 1m at the width, 23 bolts with the diameter of 28mm and the length of 60mm are arranged, 2 bolts at the top are increased by 1 line from top to bottom, and five bolts are arranged. The steel rod 11 is 5m long, 30cm in diameter and 5cm in wall thickness, fixed threads are engraved at two ends, the lower end of the steel rod is fixed with the trapezoidal anchor block 14 through a fastening nut, and the upper end of the steel rod penetrates through the stop plate 19 and is fixed with the stop plate through the fastening nut. The nut was tightened to an internal diameter of 30cm. The baffle 19 is a rectangular steel plate with the length of 1m, the width of 0.5m and the thickness of 15mm, and a circular duct with the diameter of 30cm is reserved in the geometric center.
The specific control process is as follows:
in the process that the ultrahigh vehicle impacts the energy dissipation devices on two sides of the main beam 1, the collision thick steel plate 3 receives impact force, so that the variable cross section steel pipe 5 is extruded, the soft steel pipe 6 and the lead column 7 in the variable cross section steel pipe 5 are compressed due to the stress and are expanded and deformed transversely, the lead column 7 in the soft steel pipe 6 is extruded from the small hole to perform plastic flow, and finally the variable cross section steel pipe 5, the soft steel pipe 6 and the lead column 7 all play a role in collision energy dissipation.
When the ultrahigh vehicle impacts the bottom of the main beam 1 to impact the energy dissipation device, the thick steel plate 3 is impacted to move to the inner side of the main beam 1, the variable-section steel pipe 5 is sheared and deformed, the inner side is compressed, and the outer side is stretched. The soft steel tube 6 is similarly bent and deformed, the lead column 7 is extruded from the small hole to perform plastic flow due to deformation, and finally the variable cross section steel tube 5, the soft steel tube 6 and the lead column 7 all play a role in collision energy consumption.
As shown in fig. 4, when the collision vehicle collides with the main beam 1 from the right side, the vehicle speed is small, the tonnage is small, the impact force on the main beam 1 is small, and the impact energy can be counteracted by the collision energy dissipation device, so that the main beam 1 is prevented from being damaged. When the collision vehicle is large in speed and large in tonnage, the impact force on the main beam 1 is large, the energy consumption device is firstly impacted to consume energy, the energy consumption device is not enough to completely offset the impact force, at the moment, when the collision thick steel plate 3 is displaced by 1/2 of the designed collision length, the displacement sensor 23 turns on the oil pump switch 20 to control the right electric hydraulic telescopic cylinder to extend, so that the right steel rod 10 generates left pulling force, the hexagonal anchor block 8 is subjected to right pushing force, and the hexagonal anchor block 8 transmits the right pushing force to the main beam 1. Meanwhile, the left electric hydraulic telescopic cylinder is controlled to be shortened, so that left steel rods generate leftward pressure, and conversely, the hexagonal anchor blocks 8 are subjected to rightward thrust, and the hexagonal anchor blocks 8 transmit the rightward thrust to the main beam 1. The principle is the same when the vehicle hits the main beam from the left side. The last two steel bars simultaneously generate the resistance against the impact force to the main girder 1, so the impact force of vehicle impact is transmitted to the steel bars 10 and 11 through the electro-hydraulic telescopic cylinders 17 and 18 in the six-deformation anchor block 8 and is redispersed to the two-side piers 13, and finally the impact energy consumption is completed, and meanwhile, the electro-hydraulic telescopic cylinders 17 and 18 jointly extend and shrink, so the main girder 1 has a certain self-resetting function. Meanwhile, by means of the transverse limiting function of the stop blocks 24 on the support 9 and the beam cover 12, the main beam is prevented from being transversely shifted due to overlarge impact force, and damage such as beam falling is prevented. The safety of the bridge is greatly improved through the reasonable and effective transmission way of the impact energy consumption device to the impact energy and the transverse anti-displacement device to the impact force.
The foregoing embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit the present invention, and variations of the technical solutions of the present application are within the scope of the present application according to the common general knowledge in the art, and in any case, the foregoing embodiments are merely illustrative, and the scope of the present application is subject to the scope of the appended claims.
Claims (10)
1. The utility model provides a bridge girder striking that has striking power consumption and horizontal anti-displacement ends and loses device, bent cap (12) at pier (13) top pass through support (9) and support girder (1), its characterized in that: the device also comprises an impact energy consumption device and a transverse anti-displacement device;
the impact energy dissipation devices are fixed at the bottom and the left and right sides of the main beam (1) and comprise rubber baffles (2), impact thick steel plates (3), anchoring thick steel plates (4), variable-section steel pipes (5), soft steel pipes (6) and lead columns (7); one end of the variable cross-section steel pipe (5) and one end of the soft steel pipe (6) are welded with the collision thick steel plate (3), and the other end is welded with the anchoring thick steel plate (4) and is sealed; the lead column (7) is inserted into the soft steel pipe (6); the variable cross-section steel pipe (5) is sleeved outside the soft steel pipe (6); in the impact energy dissipation devices on the left side and the right side of the main beam (1), a rubber baffle plate (2) is arranged between the tops of the impact thick steel plate (3) and the anchoring thick steel plate (4), and the rubber baffle plate (2), the anchoring thick steel plate (4) and the main beam (1) are stuck into a whole;
the transverse anti-displacement device is fixed between the inner side of the bent cap (12) and the bottom of the main beam (1) and comprises a hexagonal anchor block (8), a trapezoidal anchor block (14), steel rods (10, 11), electric hydraulic telescopic cylinders (17, 18), a stop plate (19), an oil pump switch (20), an electric wire (21) and a displacement sensor (23); the hexagonal anchor block (8) is anchored at the bottom center of the main beam (1) through a bolt (16); the two trapezoidal anchor blocks (14) are anchored at two ends of the inner bottom of the bent cap (12) through bolts (16) respectively; the upper ends of the two steel rods (10, 11) are anchored with a stop plate (19) in the hexagonal anchor block (8) into a whole through a fastening nut (15), and the lower ends of the two steel rods are anchored with the trapezoidal anchor block (14) into a whole through the fastening nut (15); the upper ends of the electro-hydraulic telescopic cylinders (17, 18) are welded with the stop plate (19) into a whole, and the lower ends of the electro-hydraulic telescopic cylinders are welded with the hexagonal anchor blocks (8) into a whole; the oil pump switch (20) is stuck to the inner top plate of the hexagonal anchor block (8), and is connected with displacement sensors (23) at the left side, the right side and the bottom of the main beam (1) and electric hydraulic telescopic cylinders (17, 18) through wires (21).
2. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 1, wherein the bridge girder impact damage stopping device is characterized in that: the displacement sensor (23) is stuck to the bottom edge of the anchoring thick steel plate (4); the bottom of the bridge pier (13) is provided with a distribution box (22), the distribution box (22) is connected with an electric wire (21), and the distribution box (22) is connected with a commercial power or a standby power supply.
3. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 2, wherein the bridge girder impact damage stopping device is characterized in that: wherein the soft steel tube (6) is provided with a plurality of small holes along the circumferential direction, the small holes are arranged in eleven rows, and twelve annular arrays in each row are distributed; the rubber baffle (2), the anchoring thick steel plate (4) and the main beam (1) are adhered into a whole by using a cold vulcanizing agent SK 313.
4. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 1, wherein the bridge girder impact damage stopping device is characterized in that: the hexagonal anchor blocks (8) and the trapezoid anchor blocks (14) are steel anchor boxes.
5. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 1, wherein the bridge girder impact damage stopping device is characterized in that: the height of the impact energy dissipation devices on the left side and the right side of the outer part of the main beam (1) is not more than 1/4 of the height of the main beam (1).
6. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 5, wherein the bridge girder impact damage stopping device is characterized in that: the impact energy dissipation devices are formed by splicing a plurality of groups of main beams (1), so that the impact energy dissipation devices are convenient to replace and maintain after being impacted, and meanwhile, materials are saved.
7. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 3, wherein the bridge girder impact damage stopping device is characterized in that: the lead column (7) in the impact energy dissipation device is a recrystallized substance, and when the impact is suffered, the lead column (7) in the mild steel tube (6) is extruded from the small hole and generates plastic flow to consume energy.
8. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 1, wherein the bridge girder impact damage stopping device is characterized in that: the variable cross-section steel pipe (5) is formed by a plurality of semi-circles with the radius of 3cm at intervals of 3cm and is used for sealing the soft steel pipe (6) and preventing lead columns (7) in the soft steel pipe (6) from being polluted after being extruded.
9. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 1, wherein the bridge girder impact damage stopping device is characterized in that: the soft steel pipe (6) adopts steel with the yield strength of 100MPa-200 MPa.
10. The bridge girder impact damage stopping device with impact energy consumption and transverse displacement prevention functions according to claim 3, wherein the bridge girder impact damage stopping device is characterized in that:
when the ultrahigh vehicle impacts the energy dissipation devices on two sides of the main beam (1), the collision thick steel plate (3) receives impact force, so that the variable-section steel pipe (5) is extruded, the soft steel pipe (6) and the lead column (7) in the variable-section steel pipe (5) are compressed due to stress and transversely expand and deform, the lead column (7) in the soft steel pipe (6) is extruded from the small hole to perform plastic flow, and finally, the variable-section steel pipe (5), the soft steel pipe (6) and the lead column (7) all play roles in collision energy dissipation;
when the ultrahigh vehicle impacts the bottom impact energy dissipation device of the main beam (1), the thick steel plate (3) is impacted to move towards the inner side of the main beam (1), the variable-section steel tube (5) is sheared and deformed, the inner side is compressed, and the outer side is stretched; the soft steel pipe (6) is similarly bent and deformed, the lead column (7) is extruded from the small hole to perform plastic flow due to deformation, and finally the variable cross section steel pipe (5), the soft steel pipe (6) and the lead column (7) all play a role in collision energy consumption;
when the collision vehicle collides with the main beam (1) from the right side, the vehicle speed is small, the tonnage is small, the impact force on the main beam (1) is small, and the impact energy can be counteracted through the collision energy dissipation device, so that the main beam (1) is prevented from being damaged; when the collision vehicle speed is large and the tonnage is large, the impact force on the main beam (1) is large, the energy consumption device is impacted to consume energy, the impact force is not completely offset by the energy consumption device, at the moment, when the displacement of the collision thick steel plate (3) is 1/2 of the designed collision length, the displacement sensor (23) opens the oil pump switch (20) to control the extension of the right electric hydraulic telescopic cylinder, so that the right steel rod (10) generates left pulling force, the hexagonal anchor block (8) receives right pushing force, and the hexagonal anchor block (8) transmits the right pushing force to the main beam (1); simultaneously controlling the left electric hydraulic telescopic cylinder to shorten, so that the left steel rod generates leftward pressure, and conversely, the hexagonal anchor block (8) receives rightward thrust, and the hexagonal anchor block (8) transmits the rightward thrust to the main beam (1); when the vehicle impacts the main beam from the left side, the principle is the same; and finally, the two steel rods simultaneously generate resistance force opposite to the impact force for the main beam (1), and meanwhile, the transverse limit function of the stop block (24) on the support (9) and the cover beam (12) is relied on to prevent the main beam from transversely shifting due to overlarge impact force to cause the damage of falling the beam.
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