CN212294307U

CN212294307U - Energy-consuming type multidirectional limiting bridge anti-seismic device with steel springs

Info

Publication number: CN212294307U
Application number: CN202020225197.XU
Authority: CN
Inventors: 田钦; 宋鹏; 廖金莲; 童治豪
Original assignee: Nanchang University
Current assignee: Nanchang University
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2021-01-05
Anticipated expiration: 2030-02-28

Abstract

The utility model discloses an energy-consuming multidirectional limiting bridge anti-seismic device with steel springs, which comprises steel brackets, limiting parts, steel springs, sliders and connecting steel columns; the steel bracket is fixed on the side surface of the top of the pier near the movable support, the limiting pieces are fixed on the bottom of the main beam and the steel bracket, and the two limiting pieces are vertically aligned and are symmetrical in position; the locating part includes the fixed plate, square steel dog and both sides are prevented drawing steel dog, the slider is located the locating part inside, the both ends of connecting the steel column link to each other with two upper and lower sliders respectively, the material of cylindrical portion in the middle of it is energy-consuming type low yield strength steel, can rely on the energy consumption seismic energy that its plastic deformation produced, steel spring one end is fixed on both sides are prevented drawing steel dog vertical section inner wall, the other end links to each other with the slider, can make the device realize certain restoration through its restoring force effect after the earthquake finishes. The device has simple structure and good anti-seismic effect, and can limit in three directions.

Description

Energy-consuming type multidirectional limiting bridge anti-seismic device with steel springs

Technical Field

The utility model belongs to the technical field of the bridge antidetonation, concretely relates to spacing bridge antidetonation device of power consumption type multidirection with steel spring.

Background

In recent years, with the rapid development of socioeconomic technology, the urbanization process is accelerated, the construction of bridge projects is increased, the number of bridges is increased and the extension length of bridges is increased, and particularly in cities, viaducts become main traffic arteries. The bridge is used as a junction project on a traffic lifeline, the investment is large, the number is large, the bridge plays a very important role in the economic development of China and the production and life of people, once the bridge is damaged, the loss caused by the bridge is huge, and therefore the safety guarantee of the bridge is a precondition for bridge construction. Under the influence of natural disasters, particularly earthquakes, bridge facilities can be greatly damaged and even collapse, so that the life and property safety of people is threatened, and the difficulty is caused in subsequent bridge maintenance or reconstruction. Under the action of earthquake, the bridge has the following failure modes: the connecting parts such as bridge supports and the like are damaged; the displacement of the upper structure of the bridge under the action of horizontal force is overlarge to cause a beam falling phenomenon (including a transverse bridge direction and a forward bridge direction); the adjacent bridge spans (expansion joints) of the bridge are collided and damaged; the plastic hinge of the pier has insufficient bending strength and shearing strength, so that the pier is damaged.

At present, in order to limit relatively large displacement between upper beam bodies, a reinforced concrete stop block is often installed at the top of a pier capping beam of a bridge in China, but the collision between a common reinforced concrete stop block and a beam body is rigid collision, the impact force is large, the beam body and the concrete stop block are easily damaged locally, the horizontal shearing force of the reinforced concrete stop block in an earthquake is usually insufficient, the stop block is easily damaged irreparably, and the displacement of the beam body cannot be well limited. In addition, other bridge anti-seismic limiting structures mostly aim at unidirectional displacement (along the bridge or in the transverse bridge) of a bridge body, seismic waves have three directions, and unidirectional limitation of displacement of the bridge body obviously has limitation; the general stopper structure consumes seismic energy by means of deformation energy of the stopper, is poor in elastic plasticity and cannot be well restored to an original state after deformation.

To the above-mentioned not enough, need design and develop a neotype bridge antidetonation stop device, not only can cushion and consume seismic energy, do not lead to the fact extra damage to the roof beam body and device itself, the displacement of limiting the roof beam body on three direction, can also make the device resume to original similar state after the earthquake to the response next earthquake.

SUMMERY OF THE UTILITY MODEL

In view of the above defects of the prior art, the utility model provides an energy-consuming type multidirectional spacing bridge anti-seismic device with steel springs, which limits relatively large displacement between a beam body and a pier in three directions, protects a support and prevents the beam body from falling into the beam and being damaged by vibration; direct collision between beam bodies is converted into yield deformation of the connecting steel columns, so that seismic energy is indirectly consumed, and the beam bodies are prevented from being damaged by collision; the number of energy-consuming type connecting steel columns in a single device and the number of the devices are increased, so that the pulling force acting on each connecting steel column is greatly reduced, and more seismic energy is consumed; the restoring force of the steel spring is utilized to realize a certain restoring function after the device is shaken.

In order to realize the utility model discloses a purpose, the utility model discloses a technical scheme do:

an energy-consuming type multidirectional limiting bridge anti-seismic device with steel springs comprises steel brackets, limiting pieces, steel springs, sliding blocks and connecting steel columns; the steel corbel is fixed on the side surface of the top of the pier near the movable bridge support through a bolt; the limiting part comprises a fixed plate, square steel stop blocks and two side anti-drawing steel stop blocks, the square steel stop blocks are fixed on the front side and the rear side of the upper surface of the fixed plate, and a sliding rail with the width equal to that of the sliding block is formed between the two square steel stop blocks; the two anti-drawing steel stop blocks are of inverted L-shaped structures and are respectively arranged on the left side and the right side of the upper surface of the fixed plate, the distance between the horizontal section of each anti-drawing steel stop block and the upper surface of the fixed plate is equal to the height of the corresponding slider, and the steel spring is arranged between the vertical section of each anti-drawing steel stop block and the end surface of the corresponding slider and is connected with the two ends of the steel spring; the limiting piece comprises an upper limiting piece and a lower limiting piece which are the same, a fixing plate of the lower limiting piece is fixed to the top of the steel bracket through a bolt, and a fixing plate of the upper limiting piece is fixed to the bottom of the main beam through a bolt; one end of the connecting steel column is fixed at the bottom of the sliding block in the upper limiting piece, and the other end of the connecting steel column is fixed at the top of the sliding block in the lower limiting piece; and a bridge movable support arranged on the bridge support base stone is arranged between the main beam and the bridge pier.

The horizontal sections of the anti-drawing steel stop blocks are positioned on two sides of the upper surface of the sliding block, and the distance between the anti-drawing steel stop blocks on the two sides is smaller than the length of the sliding block; the bottom of the anti-drawing steel stop block is fixed on the fixing plate through a lower bottom plate, and a threaded hole for a second lower bottom plate bolt to penetrate through is formed in the lower bottom plate.

The steel corbel comprises a top plate, an inner side plate, a bottom plate and a web plate, wherein the inner side plate is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier; the one end of roof and the top mutually perpendicular of interior plate be connected the one end of bottom plate with the bottom mutually perpendicular of interior plate is connected, the inside wall of web with the outer wall of interior plate links to each other, its top and bottom respectively in the lower surface of roof and the upper surface of bottom plate link to each other.

Pin heads are arranged at two ends of the connecting steel column, and through holes for shaft pins to pass through are formed in the pin heads; grooves for inserting the two ends of the connecting steel column are formed in the two sides of the middle of the top of the sliding block, the cross section of each groove is of a semi-circular arc structure, the shape of each groove is matched with the pin heads at the two ends of the connecting steel column, and the width of each groove is slightly larger than that of each pin head; the sliding block is provided with connecting holes for the shaft pins to pass through, and the connecting holes are positioned at two sides of each groove and penetrate through the front surface and the rear surface of the sliding block.

The middle of the connecting steel column is of a cylindrical structure and is made of energy-consuming low-yield-strength steel, and the yield strength of the connecting steel column is lower than that of the pin head.

An expansion joint is formed between the main beam and the second main beam, a movable bridge support arranged on a bridge support cushion stone is arranged between the main beam and the bridge pier, and the distance between the surfaces on two sides of the sliding block and the inner wall of the vertical section of the steel pulling-resistant blocking block on the two sides is smaller than the maximum movable distance of the movable bridge support; and the distance between the surfaces of the two sides of the sliding block and the inner wall of the vertical section of the steel pulling-resistant blocking block at the two sides is smaller than the width of the expansion joint.

The beneficial effects of the utility model reside in that:

1) the utility model discloses can effectively cushion and consume seismic energy, the relatively great displacement between the restriction bridge roof beam body and the pier prevents that the roof beam body from falling the roof beam and damaging, reduces the seismic damage at movable support and expansion joint. On one hand, the anti-seismic devices are arranged near each movable support, and each anti-seismic device is provided with two energy-consuming connecting steel columns, so that the number of the connecting steel columns is large, most of seismic energy is consumed, the acting force of an earthquake on each connecting steel column is reduced, and the damage to the device is reduced; on the other hand, when the earthquake acts, the steel spring arranged between the sliding block and the steel pulling-resistant stop blocks on the two sides can convert a part of earthquake energy into elastic potential energy, so that the acting force of the earthquake is buffered, and a part of earthquake energy is consumed.

2) The utility model discloses can realize that the three-dimensional is spacing. The two ends of the connecting steel column are respectively connected with the sliding block on the limiting part at the bottom of the bridge girder and the sliding block on the limiting part on the steel bracket, and the grooves matched with the pin heads at the two ends of the connecting steel column provide a rotating space for connecting the steel column, so that the device can adapt to the displacement of the beam body along the bridge direction, the transverse bridge direction and the vertical direction.

3) The utility model discloses can realize certain reset function. The steel spring is arranged between the sliding block and the steel pulling-resistant stop blocks at two sides, and the device can be restored to the state similar to the original state after the earthquake through the restoring force effect of the steel spring so as to cope with the next earthquake.

4) The utility model has the advantages of low material price, simple structure, convenient installation, easy detection and maintenance, etc.

Drawings

Fig. 1 is a schematic view of the structure of the utility model;

FIG. 2 is a schematic side view of the present invention;

fig. 3 is a schematic three-dimensional structure of the present invention;

FIG. 4 is a schematic layout of the present invention along the bridge direction;

fig. 5 is a transverse direction layout diagram of the present invention.

In the figure: 1 steel corbel, 2 locating parts, 3 steel springs, 4 sliders, 5 connecting steel columns, 6 fixing plates, 7 square steel check blocks, 8 anti-drawing steel check blocks, 9 side plates, 10 top plates, 11 webs, 12 bottom plates, 13 steel corbel side plate bolts, 14, 15 first and second lower bottom plate bolts, 16 connecting holes, 17 grooves, 18 main beams, 19 expansion joints, 20 second main beams, 24 bridge support base stones, 23 bridge movable supports and 25 piers.

Detailed Description

The following further description of the present invention

Please refer to FIGS. 1-5

The utility model discloses an energy-consuming multidirectional limiting bridge anti-seismic device with steel springs, which comprises a steel bracket 1, a limiting part 2, a steel spring 3, a slider 4 and a connecting steel column 5; the steel corbel 1 is fixed on the side surface of the top of a pier 25 near the movable bridge support through a bolt 13; the limiting part 2 comprises a fixed plate 6, square steel stop blocks 7 and two side anti-drawing steel stop blocks 8, the square steel stop blocks 7 are fixed on the front side and the rear side of the upper surface of the fixed plate 6, and a sliding rail with the width equal to that of the sliding block 4 is formed between the two square steel stop blocks 7; the two anti-drawing steel check blocks 8 are of inverted L-shaped structures and are respectively arranged on the left side and the right side of the upper surface of the fixed plate 6, the distance between the horizontal section of each anti-drawing steel check block 8 and the upper surface of the fixed plate 6 is equal to the height of the corresponding slider 4, and the steel spring 3 is arranged between the vertical section of each anti-drawing steel check block 8 and the end surface of the corresponding slider 4 and is connected with the two ends of the steel spring 3; the limiting piece 2 comprises an upper limiting piece and a lower limiting piece which are the same, a fixing plate 6 of the lower limiting piece is fixed to the top of the steel bracket 1 through a second lower base plate bolt 15, and the fixing plate 6 of the upper limiting piece is fixed to the bottom of the main beam 18 through a first lower base plate bolt 14; one end of the connecting steel column 5 is fixed at the bottom of the sliding block 4 in the upper limiting piece, and the other end of the connecting steel column is fixed at the top of the sliding block 4 in the lower limiting piece; and a bridge movable support 23 arranged on a bridge support cushion 24 is arranged between the main beam 18 and the pier 25.

The horizontal sections of the anti-drawing steel stop blocks 8 are positioned on two sides of the upper surface of the sliding block 4, and the distance between the anti-drawing steel stop blocks 8 on the two sides is smaller than the length of the sliding block 4; the bottom of the anti-drawing steel stop block 8 is fixed on the fixing plate 6 through a lower bottom plate, and threaded holes for the

bolts

14 and 15 of the lower bottom plate to penetrate are formed in the lower bottom plate.

The steel corbel 1 comprises a top plate 10, an inner side plate 9, a bottom plate 12 and a web plate 11, wherein the inner side plate 9 is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier 25; one end of the top plate 10 is vertically connected with the top of the inner side plate 9, one end of the bottom plate 12 is vertically connected with the bottom of the inner side plate 9, the inner side wall of the web plate 11 is connected with the outer wall of the inner side plate 9, and the top and the bottom of the web plate are respectively connected with the lower surface of the top plate 10 and the upper surface of the bottom plate 12.

Pin heads are arranged at two ends of the connecting steel column 5, and through holes for shaft pins to pass through are formed in the pin heads; grooves 17 for inserting the two ends of the connecting steel column 5 are formed in the two sides of the middle of the top of the sliding block 4, the section of each groove 17 is of a semi-arc structure, the shape of each groove 17 is matched with the shape of a pin head at the two ends of the connecting steel column 5, and the width of each groove 17 is slightly larger than that of each pin head; the sliding block 4 is provided with connecting holes 16 for shaft pins to pass through, and the connecting holes 16 are positioned at both sides of each groove 17 and pass through the front and rear surfaces of the sliding block 4.

The middle of the connecting steel column 5 is of a cylindrical structure and is made of energy-consuming low-yield-strength steel, and the yield strength of the connecting steel column is lower than that of the pin head, so that the connecting steel column is deformed greatly during earthquake and consumes earthquake energy.

An expansion joint 19 is formed between the main beam 18 and the second main beam 20, a bridge movable support 23 arranged on a bridge support cushion 24 is arranged between the main beam 18 and the pier 25, and the distance between the surfaces on two sides of the sliding block 4 and the inner wall of the vertical section of the anti-pulling steel stop blocks 8 on two sides is smaller than the maximum movable distance of the bridge movable support 23; the distance between the surfaces of the two sides of the sliding block 4 and the inner wall of the vertical section of the steel pulling-resistant stop block 8 at the two sides is smaller than the width of the expansion joint 19; during earthquake, the steel springs 3 on the two sides play a role firstly to buffer earthquake energy, and then the beam body is limited to relatively large displacement through the connecting steel columns 5, so that the movable bridge support 23 is protected from being damaged due to large displacement, and the expansion joint 19 is protected.

The working principle is as follows: when no earthquake occurs, the connecting steel column 5 is in a vertical position, and the steel spring 3 is in a natural state and has no deformation. When an earthquake occurs, the main beam 18 and the bridge pier 25 generate relatively large displacement, and firstly, the sliding block 4 on the limiting piece 2 is driven to relatively slide on the fixing plate 6, so that the steel spring 3 on one side, which is positioned between the two side surfaces of the sliding block 4 and the inner walls of the vertical sections of the anti-pulling steel stop blocks 8 on the two sides, is compressed, the steel spring 3 on the other side is stretched, the acting force of the earthquake is buffered by virtue of the elasticity of the steel spring, a part of earthquake energy is converted into the elastic potential energy of the steel spring 3, and the earthquake; when the relative displacement of the main beam 18 and the bridge pier 25 exceeds the distance between the surfaces of the two sides of the sliding block 4 and the inner walls of the vertical sections of the anti-drawing steel stoppers 8 at the two sides, the connecting steel column 5 rotates along with the movement of the limiting piece 2 on the beam body and deforms under the action of tensile force, most of seismic energy is consumed by the energy generated by the plastic deformation of the connecting steel column, and therefore the relative displacement (including the forward bridge direction, the transverse bridge direction and the vertical direction) of the main beam 18 and the bridge pier 25 is limited; after the earthquake, the restoring force of the steel spring 3 acts, but the restoring capability is limited, so that the device can be restored to a state close to the original state after the earthquake so as to cope with the next earthquake.

The above mentioned is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings or the direct or indirect application in the related technical field are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a spacing bridge anti-seismic device of energy consumption type multidirectional with steel spring which characterized in that: comprises a steel bracket (1), a limiting piece (2), a steel spring (3), a sliding block (4) and a connecting steel column (5); the steel corbel (1) is fixed on the side surface of the top of a pier (25) near the bridge movable support through a bolt (13); the limiting piece (2) comprises a fixing plate (6), square steel stop blocks (7) and two side anti-drawing steel stop blocks (8), the square steel stop blocks (7) are fixed on the front side and the rear side of the upper surface of the fixing plate (6), and a sliding rail with the width equal to that of the sliding block (4) is formed between the two square steel stop blocks (7); the two anti-drawing steel check blocks (8) are of inverted L-shaped structures and are respectively arranged on the left side and the right side of the upper surface of the fixed plate (6), the distance between the horizontal section of each anti-drawing steel check block (8) and the upper surface of the fixed plate (6) is equal to the height of the slider (4), and the steel spring (3) is arranged between the vertical section of each anti-drawing steel check block (8) and the end surface of the slider (4) and is respectively connected with the two ends of the steel spring (3);

the limiting piece (2) comprises an upper limiting piece and a lower limiting piece which are the same, a fixing plate (6) of the lower limiting piece is fixed to the top of the steel bracket (1) through a bolt, and the fixing plate (6) of the upper limiting piece is fixed to the bottom of the main beam (18) through a bolt;

one end of the connecting steel column (5) is fixed at the bottom of the sliding block (4) in the upper limiting piece, and the other end of the connecting steel column is fixed at the top of the sliding block (4) in the lower limiting piece; and a bridge movable support (23) arranged on a bridge support cushion stone (24) is arranged between the main beam (18) and the pier (25).

2. The energy-consuming type multidirectional limiting bridge anti-seismic device with the steel springs as claimed in claim 1, is characterized in that: the horizontal sections of the anti-drawing steel stop blocks (8) are positioned on two sides of the upper surface of the sliding block (4), and the distance between the anti-drawing steel stop blocks (8) on the two sides is smaller than the length of the sliding block (4); the bottom of the anti-drawing steel stop block (8) is fixed on the fixing plate (6) through a lower bottom plate, and a threaded hole for a second lower bottom plate bolt (15) to penetrate through is formed in the lower bottom plate.

3. The energy-consuming type multidirectional limiting bridge anti-seismic device with the steel springs as claimed in claim 1, is characterized in that: the steel corbel (1) comprises a top plate (10), an inner side plate (9), a bottom plate (12) and a web plate (11), wherein the inner side plate (9) is provided with a plurality of bolt holes for fixing the inner side plate above the side wall of the pier (25); the one end of roof (10) is connected with the top mutually perpendicular of interior plate (9), the one end of bottom plate (12) with the bottom mutually perpendicular of interior plate (9) is connected, the inside wall of web (11) with the outer wall of interior plate (9) links to each other, its top with the bottom respectively in the lower surface of roof (10) and the upper surface of bottom plate (12) link to each other.

4. The energy-consuming type multidirectional limiting bridge anti-seismic device with the steel springs as claimed in claim 1, is characterized in that: pin heads are arranged at two ends of the connecting steel column (5), and through holes for shaft pins to pass through are formed in the pin heads; grooves (17) for inserting the two ends of the connecting steel column (5) are formed in the two sides of the middle of the top of the sliding block (4), the section of each groove (17) is of a semi-arc structure, the shape of each groove (17) is matched with the pin heads at the two ends of the connecting steel column (5), and the width of each groove (17) is slightly larger than that of each pin head; the sliding block (4) is provided with connecting holes (16) for shaft pins to pass through, and the connecting holes (16) are positioned on two sides of each groove (17) and penetrate through the front surface and the rear surface of the sliding block (4).

5. The energy-consuming type multidirectional limiting bridge anti-seismic device with the steel springs as claimed in claim 4, is characterized in that: the middle of the connecting steel column (5) is of a cylindrical structure and is made of energy-consuming low-yield-strength steel, and the yield strength of the connecting steel column is lower than that of the pin head.

6. The energy-consuming type multidirectional limiting bridge anti-seismic device with the steel springs as claimed in claim 1, is characterized in that: an expansion joint (19) is formed between the main beam (18) and the second main beam (20), a bridge movable support (23) arranged on a bridge support cushion stone (24) is arranged between the main beam (18) and the pier (25), and the distance between the surfaces on two sides of the sliding block (4) and the inner wall of the vertical section of the tensile steel pulling stop blocks (8) on the two sides is smaller than the maximum movable distance of the bridge movable support (23); the distance between the surfaces of the two sides of the sliding block (4) and the inner wall of the vertical section of the steel pulling-resistant stop block (8) of the two sides is smaller than the width of the expansion joint (19).