Self-repairing high-speed railway pier with equivalent replacement method for damaged main reinforcement

Abstract

The application discloses a self-repairing high-speed railway pier adopting a seismic damage post-main-reinforcement equivalent replacement method and relates to the field of bridge seismic resistance.The pier comprises main reinforcement and replacement reinforcement, the replacement reinforcement is arranged at intervals from the main reinforcement, the main reinforcement comprises multiple energy dissipation reinforcing bars, sliding devices are arranged between two adjacent energy dissipation reinforcing bars, the sliding device comprises an upper sliding unit and a lower sliding unit, the upper sliding unit and the lower sliding unit are connected in the form of a sliding groove and a sliding block, and the lower sliding unit is additionally provided with a limiting assembly for limiting the sliding of the upper sliding unit.Through the arrangement of the replacement reinforcement and the sliding unit, when the pier encounters a larger earthquake, the replacement reinforcement can dissipate energy, and the equivalent replacement of the main reinforcement can be automatically completed after the earthquake, so that the self-repairing of the pier during the earthquake is realized.

Description

TECHNICAL FIELD

[0001] The application relates to the field of bridge anti-seismic, in particular to a self-repairing high-speed railway pier adopting a post-earthquake main reinforcement equivalent replacement method. BACKGROUND

[0002] High-speed railway bridges play a vital role in the whole high-speed railway, so preventing the destruction of high-speed railway bridges is of great significance.

[0003] In past earthquakes, the seismic damage of piers mainly concentrates on the peeling of the bottom plastic hinge area protective layer concrete, the crushing of the core concrete and the yielding and destruction of the longitudinal reinforcement; the pier plays the role of supporting the main beam and the track structure and transmitting the seismic load of the upper structure to the foundation. Therefore, the pier is an indispensable key component of the bridge structure; however, the existing traditional piers mostly have the following defects:

[0004] 1. The control of the longitudinal reinforcement ratio to ensure the ductility of the pier leads to the insufficient longitudinal reinforcement of the pier in a major earthquake, causing the yielding and destruction of the longitudinal reinforcement.

[0005] 2. The residual displacement of the pier caused by the earthquake is difficult to control.

[0006] 3. The post-earthquake repair process of the pier is complicated, and it is difficult to ensure that the repair is completed quickly after the damage to resist the next earthquake. SUMMARY

[0007] In order to quickly repair the pier after the earthquake and make it quickly put into use again, the application provides a self-repairing high-speed railway pier adopting a post-earthquake main reinforcement equivalent replacement method.

[0008] The application provides a self-repairing high-speed railway pier adopting a post-earthquake main reinforcement equivalent replacement method, which adopts the following technical scheme:

[0009] A self-repairing high-speed railway pier adopting a post-earthquake main reinforcement equivalent replacement method, comprising main reinforcement, and further comprising replacement reinforcement, which is arranged at intervals with the main reinforcement; the main reinforcement comprises multiple energy-consuming steel bars, and a sliding device is arranged between adjacent two energy-consuming steel bars; the sliding device comprises an upper sliding unit and a lower sliding unit, and the upper sliding unit and the lower sliding unit are connected in the form of a sliding groove and a sliding block; the lower sliding unit is further provided with a limiting assembly for limiting the sliding of the upper sliding unit.

[0010] By adopting the technical scheme, in the case of a small earthquake, the main reinforcement ensures normal use of the pier, at this time the limiting assembly does not limit, the substitute reinforcement is not resistant to tension and compression, so that the over-reinforcement phenomenon can be avoided; when a large earthquake occurs, the main reinforcement first bears the fluctuation of the bridge and receives tension and compression, when the main reinforcement is broken by tension, the adjacent energy dissipation reinforcement starts to move away from each other under tension and starts to dissipate energy;

[0011] When the two energy dissipation reinforcements move away to the maximum position, the limiting assembly limits the relative position of the upper sliding unit and the lower sliding unit to avoid disengagement; when the energy dissipation reinforcement starts to be compressed and the upper sliding unit and the lower sliding unit return to the initial position, the limiting assembly limits the separation of the two again, so as to fix the upper sliding unit and the lower sliding unit together;

[0012] At this time, the substitute reinforcement can be resistant to tension and compression, so as to complete the equivalent replacement of the main reinforcement; the residual displacement of the pier caused by the earthquake is controlled, and the post-earthquake repair process of the pier is simplified, and the self-repair of the pier reinforcement is completed.

[0013] Preferably, the upper sliding unit comprises an upper connecting sleeve, a protrusion, a lower end hole sliding block and an upper end hole sliding block, the upper connecting sleeve is fixedly connected to the energy dissipation reinforcement, the protrusion is fixedly connected to the upper connecting sleeve, the upper end hole sliding block is fixedly connected to the protrusion, and the lower end hole sliding block is fixedly connected to the protrusion through a shear pin.

[0014] Preferably, the lower sliding unit comprises a lower connecting sleeve, a groove for inserting the protrusion is arranged in the lower connecting sleeve, and a sliding groove is arranged in the side wall of the groove in the horizontal direction.

[0015] Preferably, sliding grooves two are arranged in the two opposite sides of the lower end hole sliding block, a through hole is arranged in the bottom side of the sliding groove two, and a containing cavity for containing the upper end hole sliding block is further arranged in the lower end hole sliding block, when the upper end hole sliding block is located in the containing cavity, the sliding groove one and the sliding groove two overlap in the horizontal direction.

[0016] Preferably, a plurality of limiting assemblies are arranged in pairs, the limiting assembly comprises a spring and a limiting block, the limiting block is slidably connected in the sliding groove in the horizontal direction, the limiting block is located in the sliding groove one and the sliding groove two, and the spring is used to drive the limiting block to slide to insert the through hole and the counterbore.

[0017] By adopting the technical scheme, when the upper sliding unit slides to the farthest end, the limiting block is inserted into the through hole under the action of the spring, thereby limiting the downward movement of the lower end hole sliding block to determine the relative position of the lower end hole sliding block and the lower sliding unit; after the energy dissipation steel bars start to be compressed, the shear pin is disconnected under the action of the pressure, at which time the upper sliding unit and the lower sliding unit are close to each other, and after the upper sliding unit and the lower sliding unit return to the initial position, the limiting block is inserted into the counterbore, thereby limiting the upper end hole sliding block from being separated from the lower sliding unit, and thereby the whole is completely fixed.

[0018] Preferably, one end of the spring is fixedly connected to the side wall of the sliding groove, and the other end of the spring is fixedly connected with the limiting block.

[0019] In summary, the present application has the following beneficial technical effects:

[0020] The present application sets equivalent replacement longitudinal bars for playing the equivalent self-repairing role between the conventional longitudinal bars of the bridge pier by setting the replacement steel bars and the sliding device. Under normal conditions and in the case of small earthquakes, the normal use function of the bridge pier is ensured through the conventional longitudinal bars, and the over-reinforcing phenomenon caused by adding the equivalent replacement steel bars is avoided. Under the action of a higher level of earthquake, when the conventional longitudinal bars are damaged, the limiting assembly in the sliding unit pops out, limiting the displacement of one end along the direction of the steel bar, and entering the first limiting stage. Under the subsequent earthquake movement, the limiting assembly completely fixes the sliding unit, entering the second limiting stage. At this time, the fixed equivalent self-repairing longitudinal bars are equivalent to replacing the damaged conventional longitudinal bars, realizing the equivalent replacement of the longitudinal bars in the engineering sense, that is, realizing the self-repairing of the bridge pier during earthquakes. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structural sectional view of the self-repairing high-speed railway bridge pier adopting the equivalent replacement method of the main bars after earthquake damage;

[0022] Figure 2 is the arrangement drawing of the main steel bars and the replacement steel bars;

[0023] Figure 3 is Figure 1 the part drawing of the lower end hole sliding block in

[0024] Figure 4 is Figure 1 the part drawing of the upper end hole sliding block in

[0025] Figure 5 is Figure 1 the structural sectional view of the structure in

[0026] Figure 6 is Figure 1 the structural sectional view of the structure in

[0027] Reference Signs List:

[0028] 1, main reinforcement; 2, replacement reinforcement; 3, energy dissipation reinforcement; 4, upper sliding unit; 41, protruding block; 42, upper connecting sleeve; 43, upper end hole sliding block; 431, sliding groove one; 432, counterbore; 44, lower end hole sliding block; 441, sliding groove two; 442, through hole; 443, accommodating cavity; 5, lower sliding unit; 51, lower connecting sleeve; 511, recess; 512, sliding groove; 52, spring; 53, limiting block. DETAILED DESCRIPTION

[0029] The following will be described in detail with reference to the accompanying drawings. Figures 1-6 The application is further described in detail.

[0030] The application discloses a self-repairing high-speed railway pier adopting a replacement method of main reinforcement after damage. Figure 1 and Figure 2 The structure comprises main reinforcement 1 and replacement reinforcement 2, the main reinforcement 1 is arranged at intervals with the replacement reinforcement 2, the replacement reinforcement 2 comprises two energy dissipation reinforcements 3, and a sliding device is arranged between the two energy dissipation reinforcements 3, wherein the sliding device comprises an upper sliding unit 4 and a lower sliding unit 5, and the upper sliding unit 4 and the lower sliding unit 5 are connected in the form of a sliding block and a sliding groove.

[0031] The upper sliding unit 4 comprises a protruding block 41, an upper connecting sleeve 42, an upper end hole sliding block 43 and a lower end hole sliding block 44; the upper connecting sleeve 42 is welded with the energy dissipation reinforcement 3, the protruding block 41 is fixedly connected to one side of the upper connecting sleeve 42 away from the energy dissipation reinforcement 3, the upper end hole sliding block 43 is welded on the protruding block 41, and the lower end hole sliding block 44 is connected to the protruding block 41 through a plurality of shear pins; when the shear pins receive a certain degree of shear force, the shear pins will be broken; the lower sliding unit 5 comprises a lower connecting sleeve 51, the lower connecting sleeve 51 is welded with the energy dissipation reinforcement 3, and a recess 511 for inserting the protruding block 41 is arranged on the lower connecting sleeve 51, and a sliding groove 512 is arranged on the opposite side walls of the recess 511; because the concrete works with cracks, the replacement reinforcement 2 is cast in the same way as the main reinforcement 1, and the sliding performance of the sliding device is not affected.

[0032] A limiting assembly is arranged on the opposite two side walls of the recess 511, the limiting assembly comprises a limiting block 53 and a spring 52, the limiting block 53 is slidably connected in the sliding groove 512 in the horizontal direction, and the two ends of the spring 52 are connected to the inner wall of the sliding groove 512 and the limiting block 53 respectively; the spring 52 is used to drive the limiting block 53 to slide to be separated from the sliding groove 512, and the two energy dissipation reinforcements 3 begin to participate in energy dissipation and do not hinder the trend of the pier to restore the initial state.

[0033] Reference Figure 3 and Figure 4The upper end hole sliding block 43 is provided with a sliding groove one 431 on both sides for inserting the limiting block 53, and a counterbore 432 is provided at the upper end of the sliding groove one 431 for inserting the limiting block 53; the lower end hole sliding block 44 is a reversed U-shaped sliding block, and sliding grooves two 441 are provided on both sides for inserting the limiting block 53, and through holes 442 are provided at the lower end of the sliding grooves two 441 for inserting the limiting block 53; and it is further provided with a containing cavity 443 for containing the upper end hole sliding block 43, when the upper end hole sliding block 43 is located in the containing cavity 443, the sliding groove one 431 and the sliding groove two 441 overlap in the horizontal direction.

[0034] Reference Figure 5 and Figure 6 In the case of small earthquakes, the main reinforcement 1 ensures the normal use of the pier, at this time the substitute reinforcement 2 does not act, so that the over-reinforced phenomenon can be avoided; when a large earthquake occurs, the main reinforcement 1 first bears the fluctuation of the bridge and receives tension and pressure, when the main reinforcement 1 is broken by tension, the adjacent energy dissipation reinforcement 3 is subjected to tension and begins to move away from each other, at this time the limiting block 53 slides in the sliding groove two 441.

[0035] When the two energy dissipation reinforcements 3 move away to a certain distance, the limiting block 53 is inserted into the through hole 442 and the sliding groove one 431 under the action of the spring 52, the limiting block 53 abuts against the side wall of the sliding groove one 431 to limit the position of the upper end hole sliding block 43 and the lower sliding unit 5, so that they cannot further move away; at the same time, the setting of the through hole 442 fixes the relative position of the lower end hole sliding block 44 and the lower sliding unit 5; when the energy dissipation reinforcement 3 is subjected to compression, the shear pin is disconnected under the action of the pressure, the upper sliding unit 4 begins to sink, and the lower end hole sliding block 44 remains stationary under the action of the limiting block 53, the limiting block 53 slides in the sliding groove one 431, when it returns to the original position, the limiting block 53 further slides in the horizontal direction under the action of the spring 52 and is inserted into the counterbore 432, thereby limiting the position of the upper end hole sliding block 43, and completing the connection of the upper end hole sliding block 43 and the lower sliding unit 5.

[0036] At this time, the substitute reinforcement 2 can resist tension and compression, thereby completing the equivalent replacement of the main reinforcement 1; the residual displacement of the pier caused by the earthquake is controlled, and after the earthquake, since the damaged reinforcement has been replaced, it is not necessary to repair the reinforcement; at the same time, the post-earthquake repair process of the pier is simplified, and the self-repair of the pier reinforcement is completed.

[0037] The implementation principle of the self-repairing high-speed railway pier adopting the equivalent replacement method of damaged main reinforcement is as follows: under the condition of small earthquakes, the main reinforcement 1 supports the pier, and the substitute reinforcement 2 does not work, thereby avoiding the over-reinforcement phenomenon; when the main reinforcement 1 is damaged due to large earthquakes, the substitute reinforcement 2 can complete energy dissipation when being pulled, and after the complete condition of being pulled first and then being compressed, the sliding device is locked, a plurality of energy dissipation reinforcements 3 form a complete reinforcement to support the pier, and the equivalent replacement of the main reinforcement 1 is completed.

[0038] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A self-repairing high-speed railway pier using a method of equivalent replacement of damaged main reinforcement, comprising main reinforcement (1), characterized in that: The application further comprises a substitute steel bar (2) which is arranged in a spaced manner with the main steel bar (1); the substitute steel bar (2) comprises a plurality of energy-consuming steel bars (3), and a sliding device is arranged between two adjacent energy-consuming steel bars (3); the sliding device comprises an upper sliding unit (4) and a lower sliding unit (5), the upper sliding unit (4) and the lower sliding unit (5) are connected in the form of a sliding groove and a sliding block, and the lower sliding unit (5) is further provided with a limiting assembly for limiting the sliding of the upper sliding unit (4). The upper sliding unit (4) comprises an upper connecting sleeve (42), a protruding block (41), a lower end sliding block with holes (44) and an upper end sliding block with holes (43), the upper connecting sleeve (42) is fixedly connected to the energy-consuming steel bar (3), the protruding block (41) is fixedly connected to the upper connecting sleeve (42), the upper end sliding block with holes (43) is fixedly connected to the protruding block (41), and the lower end sliding block with holes (44) is fixedly connected to the protruding block (41) through a shear pin.

2. The self-repairing high-speed railway pier using the method of equivalent replacement of damaged main reinforcement according to claim 1, characterized in that: The lower sliding unit (5) comprises a lower connecting sleeve (51), a groove (511) is arranged in the lower connecting sleeve (51) and used for inserting the protruding block (41), and a sliding groove (512) is arranged in the side wall of the groove (511) and used for sliding in the horizontal direction.

3. The self-repairing high-speed railway pier of claim 2, wherein: Sliding grooves (431) are arranged in the two opposite side surfaces of the upper end sliding block with holes (43), and counterbores (432) are arranged in the top side surfaces of the sliding grooves (431).

4. The self-repairing high-speed railway pier of claim 3, wherein: Sliding grooves (441) are arranged in the two opposite side surfaces of the lower end sliding block with holes (44), and through holes (442) are arranged in the bottom side surfaces of the sliding grooves (441); the lower end sliding block with holes (44) is further provided with a containing cavity (443) for containing the upper end sliding block with holes (43), and the sliding grooves (431) and the sliding grooves (441) overlap in the horizontal direction when the upper end sliding block with holes (43) is located in the containing cavity (443).

5. The self-repairing high-speed railway pier of claim 4, wherein: The limiting assembly is arranged in a plurality of pairs, and the limiting assembly comprises a spring (52) and a limiting block (53), the limiting block (53) is slidably connected to the sliding groove (512) in the horizontal direction, the limiting block (53) is located in the sliding grooves (431) and the sliding grooves (441), and the spring (52) is used for driving the limiting block (53) to slide and insert into the through holes (442) and the counterbores (432).

6. The self-repairing high-speed railway pier employing the shock-damaged main reinforcement equivalent replacement method according to claim 5, characterized in that: One end of the spring (52) is fixedly connected to the side wall of the sliding groove (512), and the other end of the spring (52) is fixedly connected to the limiting block (53).

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