CN112030726A - A self-reset bridge pier-column structure system and construction method with an external grading energy dissipation device - Google Patents

Abstract

The invention discloses a self-resetting bridge pier column structure system with an external grading energy consumption device and a construction method, wherein the self-resetting bridge pier column structure system comprises: the pier is wrapped with pier embedded parts around and borne by a bridge abutment, and the bridge abutment and the pier are connected through unbonded prestressed steel bars; the at least one group of grading energy consumption devices are symmetrically arranged outside two side walls of the bridge pier and are connected with the bridge pier and the bridge abutment; the grading energy consumption device comprises a first energy consumption piece and a second energy consumption piece; the first energy dissipation part comprises a first connecting part which extends longitudinally along the bridge pier; at least one side of the first connecting part is provided with a plurality of energy consumption plates which are arranged along the longitudinal direction; the second energy dissipation part comprises a second connecting part which extends longitudinally along the bridge pier; the second main body part is provided with a plurality of baffles corresponding to the energy consumption plates; a plurality of energy consumption boards are arranged between the plurality of baffles in a penetrating mode, and gaps are reserved between the energy consumption boards and the baffles. The invention enhances the energy consumption strength of the self-resetting bridge pier column structure system and reduces the repair time and repair cost after the earthquake.

Description

A self-reset bridge pier-column structure system and construction with an external grading energy dissipation device method

technical field

The invention belongs to the field of bridge engineering, and in particular relates to a self-reset bridge pier-column structure system with an external grading energy dissipation device and a construction method.

Background technique

At present, the seismic design of bridges at home and abroad mainly adopts the ductility design concept, which allows the piers to enter the plasticity, and dissipates the seismic energy through the concrete cracking in the plastic hinge area and the yielding of the steel bars. The earthquake damage investigation shows that the seismic design based on the ductility of the piers can ensure that the bridge is not prone to collapse during the earthquake. However, under the action of strong earthquakes, the plastic hinge area of the pier is severely damaged, and the pier will produce excessive residual displacement. Due to the serious damage of traditional bridge piers under the action of strong earthquakes, it takes a long time for reinforcement or demolition after the earthquake, which seriously affects its normal use function, not only causing huge economic losses, but also restoring urban traffic functions after the earthquake. posed a huge obstacle. In order to improve the use function of the bridge structure after the earthquake and restore the traffic lifeline quickly, the performance-based bridge seismic design theory and method have been developed rapidly. Many scholars at home and abroad have designed a series of self-resetting bridge pier structures. Prestressed steel bars or dampers dissipate seismic energy and remain in good condition after an earthquake. However, it also brings some problems. Its ability to consume seismic energy needs to be improved, and the concrete at the foot of many energy-dissipating swaying piers is seriously damaged, which brings difficulties to the seismic reinforcement work. There is an urgent need to develop a self-resetting bridge pier-column structure system that can provide sufficient compressive strength in strong earthquakes, has energy dissipation effects, and can be replaced in time after damage.

SUMMARY OF THE INVENTION

In order to solve the technical problem proposed in the background art, the present invention provides a self-resetting bridge pier column structure system and a construction method with an externally-installed grading energy dissipation device.

The technical scheme of the present invention is:

A self-resetting bridge pier-column structure system with externally installed grading energy dissipation devices, comprising:

Bridge piers, surrounded by pier embedded parts;

The bridge abutment is arranged below the bridge pier to carry the bridge pier, and the bridge abutment and the inside of the bridge pier are connected by unbonded prestressed steel bars with elastic reset function;

At least one group of graded energy-consuming devices, which are symmetrically arranged on the outside of the two side walls of the bridge pier and connected to the bridge pier and the bridge abutment; the graded energy-consuming device includes a first energy-consuming part and a second energy-consuming part ;

The first energy consuming part includes a first connecting part extending longitudinally along the bridge pier, one end of the first main body connecting part is connected with the bridge pier; at least one side of the first connecting part is provided with a plurality of longitudinally extending parts. Arranged energy-consuming panels;

The second energy dissipation member includes a second connection portion extending longitudinally along the bridge pier, and the second connection portion is connected to the bridge abutment; baffles corresponding to the plates; a plurality of the energy-consuming plates are penetrated between the plurality of baffles, and a gap is reserved between the energy-consuming plates and the baffles.

Further preferably, a plurality of the energy consumption plates are arranged on both sides of the first energy consumption member, and the second energy consumption members are correspondingly arranged on both sides of the first energy consumption member.

Further preferably, the energy dissipation plates on both sides of the first energy dissipation member are symmetrical to each other.

Further preferably, two groups of the graded energy dissipation devices 3 are provided, and the two groups of the graded energy dissipation devices 3 are arranged along the extension direction of the bridge.

Further preferably, the second connecting part includes at least one connecting piece extending along the longitudinal direction of the bridge pier, and a plurality of the baffles are arranged on the connecting piece in the longitudinal direction; The connecting piece is arranged along the periphery of the baffle.

Further preferably, the bridge abutment is composed of an upper steel plate, a lower steel plate and a connecting steel plate disposed therebetween, and the bridge pier is mounted on the upper steel plate.

Further preferably, the bottom of the bridge pier is also pre-embedded with a bottom embedded part, the bottom embedded part protrudes toward the bridge abutment to form a first limiting part, and the middle part of the upper steel plate is formed concave toward the lower steel plate. A second limiting portion matched with the first limiting portion, the first limiting portion is embedded in the second limiting portion for limiting the lateral displacement of the bridge pier.

Further preferably, the first connecting part is connected to the bridge pier through a lug plate, bolt holes are reserved on the upper end of the first connecting part and the lug plate, and the first connecting part is connected to the lug through bolts. The plates are detachably connected; bolt holes are reserved at the bottom of the second connecting portion and the upper steel plate of the abutment, and the second connecting portion is detachably connected with the abutment through high-strength bolts.

Further preferably, when the bridge pier and the bridge abutment are prefabricated, a steel bar channel is reserved in it, and the unbonded prestressed steel bar passes through the steel bar channel, penetrates the bridge pier and the bridge abutment, and is anchored to the bridge. on stage.

A construction method for a self-resetting bridge pier-column structure system with an external grading energy dissipation device, which is used for processing the self-resetting bridge pier-column structure system with an external grading energy dissipation device according to any one of claims 1-9, It is characterized in that the specific construction steps are as follows:

S1: the bridge pier and the bridge abutment are constructed by cast-in-place or prefabrication; during pouring, the steel bar channel is reserved in the bridge pier and the bridge abutment, and the steel bar channel of the bridge abutment and the steel bar channel of the bridge pier are strictly Alignment; pre-embedded lugs on the side walls of the pier;

S2: The bridge pier is butt-installed with the bridge abutment, and the first energy consuming part is connected to the bridge pier; the plurality of baffles of the second energy consuming part are inserted and connected to the energy consuming plate , and the second energy-consuming part is installed on the bridge abutment;

S3: The unbonded prestressed steel bar penetrates through the reserved steel bar channel to connect the bridge pier and the bridge abutment and is anchored to the bridge abutment to complete the construction of the self-reset bridge pier-column structure system.

The present invention provides a construction method for a self-resetting bridge pier-column structure system with an external grading energy dissipation device, which has the following advantages and positive effects compared with the prior art:

1. The present invention realizes the self-recovery function of the bridge pier node by setting unbonded prestressed steel bars, and realizes the stable energy consumption of the bridge pier node by setting the replaceable grading energy dissipation device; when an earthquake occurs, the bridge pier will follow the width of the bridge. The direction of the left and right deflection and inclination occurs. At this time, the energy dissipation plate and the baffle plate collide and deform plastically, which consumes the energy input into the bridge pier-column structure system by the earthquake, so that the bridge pier-column structure system is always maintained in an elastic state and effectively protects the bridge pier-column structure. In addition, multiple longitudinally arranged energy-consuming panels and multiple baffles realize graded energy consumption. During the deflection and inclination of the bridge pier, the uppermost energy-consuming panel is subjected to the greatest pressure, and then multiple energy-consuming panels gradually consume energy in stages. , effectively distribute the pressure, improve the life of the energy-consuming device and improve the energy-consuming capacity of the bridge pier-column structure system; and the hierarchical energy-consuming device in the present invention is detachably connected to the bridge pier and the abutment, so that it can be quickly replaced after damage. Significantly reduced post-earthquake repair time and reduced repair costs.

2. The grading energy-consuming device in the present invention is composed of a first energy-consuming part and a second energy-consuming part, wherein the energy-consuming plate and the baffle are interpenetrated with each other and a gap is reserved between them, rather than being made in one piece. The solid structure allows the energy-consuming components to have a certain deformation margin. When subjected to force, the two deform slightly and collide with each other to dissipate energy, thereby playing a certain buffering role and effectively preventing the energy-consuming components themselves from being impacted by huge forces in a short period of time. , effectively prolonging its service life; and the micro-deformed first and second energy-consuming parts can be automatically reset, so that the grading energy-consuming device is not damaged after the pier is subjected to multiple micro-seisms, and the energy-dissipating capacity is excellent.

Description of drawings

The above and other features and advantages of the present invention will be more clearly understood from the following detailed description in conjunction with the accompanying drawings, wherein:

Fig. 1 is the schematic diagram of the self-resetting bridge pier-column structural system of the external grading energy dissipation device in the present invention;

Fig. 2 is the A-A sectional view of Fig. 1;

3 is a schematic structural diagram of a hierarchical energy-consuming device in the present invention;

Fig. 4 is the structural representation of bridge abutment in the present invention;

FIG. 5 is a schematic diagram of the connection between the graded energy dissipation device, the embedded parts of the bridge pier and the bridge abutment in the present invention.

Symbol Description:

1-bridge pier; 2-bridge pier embedded parts; 3-classified energy-consuming device; 301-first energy-consuming part; 3011-first connecting part; 3012-energy-consuming plate; 302-second energy-consuming part; 2-connecting part; 3022-baffle plate; 3023-connecting piece; 4-abutment; 401-upper steel plate; 402-lower steel plate; 403-connecting steel plate; 404-first limit part; 405-second limit part; 5- unbonded prestressed steel bar; 6- steel bar channel; 7- bottom embedded part; 8- longitudinal bar; 9- ear plate.

Detailed ways

In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts, and obtain other implementations.

In order to keep the drawings concise, the drawings only schematically show the parts related to the present invention, and they do not represent its actual structure as a product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. As used herein, "one" not only means "only one", but also "more than one".

1-5, the present embodiment provides a self-resetting bridge pier-column structure system with an external grading energy dissipation device, including: a bridge pier 1 surrounded by a bridge pier embedded part 2; an abutment 4, arranged on the The bottom of the bridge pier 1 is used to carry the bridge pier 1, and the bridge abutment 4 is connected with the inside of the bridge pier 1 through the unbonded prestressed steel bar 5 with elastic reset function;

At least one group of graded energy-consuming devices 3, which are symmetrically arranged outside the two side walls of the bridge pier 1 and connected to the bridge pier 1 and the bridge abutment 4; the graded energy-consuming device 3 includes a first energy-consuming part 301 and a second energy-consuming part 302; The first energy dissipating member 301 includes a first connecting portion 3011 extending longitudinally along the bridge pier 1, and one end of the first connecting portion 3011 is connected with the bridge pier 1; plate 3012; the second energy dissipation member 302 includes a second connecting portion 3021 extending longitudinally along the bridge pier 1, the second connecting portion 3021 is connected to the abutment 4; the second connecting portion 3021 is provided with a plurality of corresponding energy dissipation plates 3012 baffles 3022; a plurality of energy-consuming plates 3012 are inserted between the plurality of baffles 3022, and a gap is reserved between the energy-consuming plates 3012 and the baffles 3022.

In the present invention, by setting the replaceable grading energy dissipation device 3, when an earthquake occurs, the bridge pier 1 will deflect and bend left and right along the width direction of the bridge. At this time, the energy dissipation plate 3012 and the baffle plate 3022 collide and undergo plastic deformation, which consumes earthquake The energy of the bridge pier-column structure system is input, so that the bridge pier-column structure system is always maintained in an elastic state and effectively protects the bridge pier-column structure system; and multiple longitudinally arranged energy dissipation panels 3012 and multiple baffles 3022 achieve graded dissipation During the deflection and tilting process of the bridge pier 1, the uppermost energy-consuming plate 3012 is under the greatest pressure, and then multiple energy-consuming plates 3012 gradually consume energy in stages, effectively sharing the pressure, and improving the life of the energy-consuming device and thereby improving the bridge pier column. The energy dissipation capacity of the structural system; and the grading energy dissipation device in the present invention is detachably connected to the bridge pier and the bridge abutment, so that it can be quickly replaced after damage, which greatly reduces post-earthquake repair time and reduces repair costs.

In this embodiment, when installing the first energy-consuming part 301 and the second energy-consuming part 302, the length of the energy-consuming plate 3012 being inserted between the baffles 3022 is adjusted to control the length of the energy-consuming plate 3012 entering the plastic energy-consuming state. point in time.

In this embodiment, the lengths of the baffles 3022 and the energy dissipation plates 3012 are not limited, and the lengths of the multiple energy dissipation plates 3012 along the extending direction of the bridge may also be inconsistent, and the lengths of the corresponding multiple baffles may also be different. It can be inconsistent; the length of the energy dissipation board is related to its energy dissipation capacity, and the optimal length of the energy dissipation board should be simulated and calculated according to the specific conditions of the bridge pier-column structural system.

In this embodiment, referring to FIG. 5 , a plurality of energy-consuming plates 3012 are preferably provided on both sides of the first energy-consuming part 301 , and the second energy-consuming parts 302 are correspondingly provided on both sides of the first energy-consuming part 301 ; It is beneficial to enhance the energy dissipation capacity of the first energy dissipation member 301 and the second energy dissipation member 302, and the deflection direction of the bridge pier at the epicenter is not fixed. The variability of the deflection direction is beneficial to enhance the stability of the first energy dissipation member and the bridge pier, so that the force is more balanced.

In this embodiment, referring to FIG. 3 , the energy dissipation plates 3012 on both sides of the first energy dissipation member 301 are symmetrical with each other, so that the forces on both sides of the first energy dissipation member 301 are balanced, and the two symmetrical energy dissipation plates 3012 receive The lateral force components can offset each other, thereby reducing damage to the first energy consuming part 301 and increasing its service life. Of course, in other embodiments, the energy consuming plate can also be arranged only on one side of the first connecting portion.

In this embodiment, referring to FIG. 5 , two sets of graded energy dissipation devices 3 are arranged, and the two sets of graded energy dissipation devices 3 are arranged along the extension direction of the bridge, thereby improving the support force for the bridge pier 1, which is beneficial to strengthen the The strength of the bridge pier-column system, and the consumption of seismic energy from reinforcement. Of course, in other embodiments, there is no limitation on the number of grading energy consuming devices. For example, three groups of grading energy consuming devices may also be set.

In this embodiment, referring to FIG. 3 , the second connecting part 3021 includes at least one connecting piece 3023 extending longitudinally along the bridge pier 1, and a plurality of baffles 3022 are arranged on the connecting piece 3023 in the longitudinal direction; A plurality of connecting pieces 3023 are arranged along the periphery of the baffle plate 3022 to enhance the reinforcement of the plurality of baffle plates 3022 to prevent the second energy consuming piece 302 from being damaged due to insufficient support of the connecting portion when the baffle plate 3022 is collided and pressed by the energy dissipation plate 3012 . In other embodiments, the specific structure of the second connection portion 3021 is not limited to the above or shown in the figures, and the specific structure of the second connection portion 3021 can be designed according to actual needs.

In this embodiment, referring to Figures 1, 4 and 5, the bridge abutment 4 is composed of an upper steel plate 401, a lower steel plate 402 and a connecting steel plate 403 arranged therebetween, and the bridge pier 1 is installed on the upper steel plate 401; the bridge abutment 4 It plays the role of supporting and partial pressure on the pier 1 column, preventing the unbonded prestressed steel bar from being overstressed when the pier 1 vibrates and tilts and tensions the unbonded prestressed steel bar, resulting in excessive local pressure at the end of the anchorage. The concrete in the bridge abutment 4 is crushed.

Further, in this embodiment, referring to FIGS. 1 and 5 , the bottom of the bridge pier 1 is also embedded with a bottom embedded part 7 , and the bottom embedded part 7 protrudes toward the abutment 4 to form a first limiting part 404 , and the upper steel plate 401 The middle portion is recessed toward the lower steel plate 402 to form a second limiting portion 405 corresponding to the first limiting portion 404 . The first limiting portion 404 is embedded in the second limiting portion 405 for limiting the lateral displacement of the bridge pier 1 . During an earthquake, the bridge pier 1 swings slightly, so that the bottom of the bridge pier and the abutment 4 form an angle and the bottom of the bridge pier tends to move sideways, and the first limiting portion 404 embedded in the second limiting portion 405 helps limit the bridge pier The lateral displacement of 1 provides a certain ductility for the pier 1, slows down the contact damage of the concrete column and the abutment 4 at the lower end of the pier, improves the local compression performance of the structure, and avoids the phenomenon of serious damage to the lower end of the pier 1 after the earthquake.

In this embodiment, referring to FIGS. 4 and 5 , the first connecting part 3011 is connected to the bridge pier 1 through the lug plate 9 , the upper end of the first connecting part 3011 and the lug plate 9 are reserved with bolt holes, and the first connecting part 3011 is connected by bolts Removably connected to the ear plate 9; bolt holes are reserved at the bottom of the second connecting portion 3021 and the upper steel plate 401 of the abutment 4, and the second connecting portion 3021 is detachably connected to the abutment 4 through high-strength bolts. When the first energy-consuming part 3011 and the second energy-consuming part 302 need to be replaced and disassembled, the bolts can be removed, and the new classification energy-consuming device 3 can be re-installed and anchored in the reserved bolt holes through bolts, and the classification can be realized by tightening the bolts. The connection between the energy-consuming device and the bridge pier and abutment greatly reduces the replacement time and improves the work efficiency.

In this embodiment, when the bridge pier 1 and the bridge abutment 4 are preferably poured, a steel bar channel 5 is reserved in it, and the unbonded prestressed steel bar 55 passes through the steel bar channel 5 and penetrates the bridge pier 1 and the bridge abutment 4, and is anchored to the bridge abutment. On the lower steel plate 402 of 4, since the unbonded prestressed steel bar 5 can realize the self-reset function under elastic deformation, the unbonded prestressed steel bar 5 can achieve effective tension at the epicenter without bending, so that the pier 1 can rely on the unbonded prestressed steel bar 5. Bonding prestressed steel bars 5 to achieve elastic self-reset.

Example 2

This embodiment provides a construction method for a self-resetting bridge pier-column structure system with an external grading energy dissipation device, which is used for processing the self-resetting bridge pier-column structure system with an external grading energy dissipation device described in Embodiment 1, The specific construction steps are as follows:

S1: The bridge pier 1 and the bridge abutment 4 are constructed by cast-in-place or prefabrication; during pouring, the steel reinforcement holes are reserved in the bridge pier 1 and the bridge abutment 4, and the steel reinforcement holes of the bridge abutment 4 are strictly aligned with the steel reinforcement holes of the bridge pier 1 to ensure no stickiness. The prestressed steel bars 5 pass smoothly along the steel bar channel 5 of the bridge pier 1 and the steel bar channel 5 of the bridge abutment 4 to achieve effective tension; at the same time, the side walls of the bridge pier 1 are embedded with lugs 9;

S2: The bridge pier 1 is connected to the bridge abutment 4, and the first energy-consuming part 301 is connected to the bridge pier 1; the plurality of baffles 3022 of the second energy-consuming part 302 are inserted and connected to the energy-consuming plate 3012, and the second energy-consuming part 302 is connected to the energy-consuming plate 3012. The energy piece 302 is installed on the bridge platform 4;

S3: The unbonded prestressed steel bar 5 penetrates through the reserved steel bar channel 5 to connect the column 1 of the bridge pier and the abutment 4 and is anchored to the abutment 4 to complete the construction of the self-resetting bridge pier-column structure system.

Specifically, in step S1, when the pier 1 and the abutment 4 are prefabricated or cast-in-place, the column of the pier 1 is equipped with corresponding longitudinal bars 8 and stirrups according to the force; And the abutment 4 is also poured with concrete.

In step S2, the prefabricated bridge pier 1 and the bridge abutment 4 are docked, and at the same time, the upper end of the first connecting portion 3011 and the bottom of the second connecting portion 3021 of the first energy dissipation member 301 are respectively connected with the ear plate 9 of the side wall of the bridge pier through bolts. Connect with the bridge abutment 4, and perform the preliminary connection and installation of the bridge pier 1 and the bridge abutment 4.

In step S4, the unbonded prestressed steel bar 5 in the present invention can be made of high-strength steel strands with a strength grade of 320-1860N/mm2 and a diameter of 8.6-15.2mm; the tensioning method of the present invention adopts a post-tensioning method, using Special grease is applied to the surface of prestressed steel bars to make unbonded prestressed steel strands. When tensioning the unbonded prestressed steel bar 5 from the reserved steel bar channel 5, ensure that the initial tension of the unbonded prestressed steel bar 5 is moderate, and the tension of the unbonded prestressed steel bar 5 should not be too small, otherwise it will not be self-sufficient. The effect of reset should not be too large, so that the unbonded prestressed steel bar 5 maintains its elastic properties during the stress process, so the initial tension is between 30% and 50% of the ultimate tension, so that the Stressed steel bars can not only have good self-resetting properties, but also remain in the elastic stage without entering the plastic stage to prevent stiffness reduction or residual deformation.

The construction method of the self-resetting bridge pier-column structure system provided by the present invention adopts cast-in-place or prefabricated components, and the construction is clear and simple; It is very convenient to install and meet the requirements of rapid update and repair after the earthquake. At the same time, it ensures the durability of the bridge pier-column structure system and the rapid repair performance after the earthquake.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and the technical equivalents thereof, they still fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides an external hierarchical power consumption device from restoring to throne bridge pier column structure system which characterized in that includes:

the pier is wrapped with pier embedded parts around;

the abutment is arranged below the pier and used for bearing the pier, and the abutment and the interior of the pier are connected through unbonded prestressed steel bars with an elastic reset function;

the at least one group of grading energy consumption devices are symmetrically arranged outside two side walls of the bridge pier and are connected with the bridge pier and the bridge abutment; the grading energy consumption device comprises a first energy consumption piece and a second energy consumption piece;

the first energy dissipation part comprises a first connecting part which extends longitudinally along the bridge pier, and one end of the first main body connecting part is connected with the bridge pier; at least one side of the first connecting part is provided with a plurality of energy consumption plates which are arranged along the longitudinal direction;

the second energy dissipation part comprises a second connecting part which extends longitudinally along the bridge pier, and the second connecting part is connected with the bridge abutment; the second main body part is provided with a plurality of baffle plates corresponding to the energy dissipation plates; the energy dissipation plates penetrate through the baffle plates, and gaps are reserved between the energy dissipation plates and the baffle plates.

2. The self-resetting bridge pier column structure system with the external graded energy consumption devices according to claim 1, wherein a plurality of energy consumption plates are arranged on two sides of the first energy consumption piece, and the second energy consumption pieces are correspondingly arranged on two sides of the first energy consumption piece.

3. The self-resetting bridge pier structure system with external graded energy consumption devices according to claim 2, wherein the energy consumption plates on two sides of the first energy consumption piece are symmetrical to each other.

4. The self-resetting bridge pier column structure system with the external graded energy consumption devices according to claim 1, wherein two sets of graded energy consumption devices are arranged along the extending direction of the bridge.

5. The self-resetting bridge pier structure system with the external graded energy consumption devices 3 as claimed in claim 1, wherein the second connecting part comprises at least one connecting piece extending along the longitudinal direction of the bridge pier, and a plurality of baffles are arranged on the connecting piece along the longitudinal direction; the baffle is provided with a plurality of connecting pieces, and the connecting pieces are arranged along the periphery of the baffle.

6. The self-resetting bridge pier column structure system with the external graded energy consumption devices according to claim 1, wherein the abutment is composed of an upper steel plate, a lower steel plate and a connecting steel plate arranged between the upper steel plate and the lower steel plate, and the bridge pier is installed on the upper steel plate.

7. The self-resetting bridge pier column structure system with the external graded energy consumption devices according to claim 6, wherein a bottom embedded part is embedded in the bottom of the pier, the bottom embedded part protrudes towards the abutment to form a first limiting part, the middle part of the upper steel plate is concave towards the lower steel plate to form a second limiting part correspondingly matched with the first limiting part, and the first limiting part is embedded in the second limiting part to limit the side movement of the pier.

8. The self-resetting bridge pier column structure system with the external graded energy consumption devices according to claim 1, wherein the first connecting portion is connected with the pier through an ear plate, bolt holes are reserved in the upper end of the first connecting portion and the ear plate, and the first connecting portion is detachably connected with the ear plate through bolts; bolt holes are reserved in the bottom of the second connecting portion and the upper steel plate of the bridge abutment, and the second connecting portion is detachably connected with the bridge abutment through high-strength bolts.

9. The self-resetting bridge pier column structure system with the external graded energy consumption devices according to claim 1, wherein a steel bar hole is reserved in the bridge pier and the abutment when the bridge pier and the abutment are prefabricated, and the unbonded prestressed steel bars penetrate through the steel bar hole, penetrate through the bridge pier and the abutment and are anchored on the abutment.

10. A construction method of a self-resetting bridge pier column structure system with an external graded energy consumption device, which is used for processing the self-resetting bridge pier column structure system with the external graded energy consumption device in any one of claims 1 to 9, and is characterized by comprising the following concrete construction steps:

s1, constructing the bridge pier and the bridge abutment in a cast-in-place or prefabricated mode; reserving a steel bar pore passage in the bridge pier and the bridge abutment during pouring, wherein the steel bar pore passage of the bridge abutment is strictly aligned with the steel bar pore passage of the bridge pier; embedding lug plates on the side walls of the piers;

s2: the bridge pier and the bridge abutment are installed in a butt joint mode, and meanwhile the first energy dissipation piece is connected with the bridge pier; the plurality of baffles of the second energy dissipation member are connected with the energy dissipation plate in an inserting mode, and the second energy dissipation member is installed on the bridge abutment;

and S3, penetrating and connecting the unbonded prestressed steel bars with the pier and the abutment through the reserved steel bar hole and anchoring the unbonded prestressed steel bars to the abutment to complete the construction of the self-resetting bridge pier column structure system.

Images