CN113605218B - Swing self-reset rigid frame bridge double-limb thin-wall pier - Google Patents

Abstract

The invention discloses a swing self-resetting double-leg thin-walled pier of a rigid frame bridge, which belongs to the technical field of pier. It includes the cap; the main beam, which is arranged directly above the cap; the double-leg pier, which has two parallel pier columns for supporting the main beam; the structure at the joint between the double-leg pier, the cap and the main beam They are all swing structures, which can sway at the joints; also include prestressed steel bars, which are fixed longitudinally in each pier column of the double-limb pier, and one end of the prestressed steel bar extends from the end of the pier column of the double-limb pier Extend out and pass through the joint into the corresponding cap or main girder for fixation; ductile steel bars are installed at the joints between the double-leg pier and the cap and the main beam, and one end of the ductile steel bar extends into the end of the double-leg pier column fixed, and the other end extends into the corresponding platform or main beam for fixing. The swing pier self-resetting system of the present invention can be applied to high-pier long-span continuous rigid-frame bridges, which is of great significance for improving the safety and disaster prevention capabilities of high-pier long-span bridges in mountainous areas, and the earthquake damage is controllable and the post-earthquake recovery speed quick.

Description

A swinging self-resetting rigid-frame bridge double-leg thin-walled pier

technical field

The invention belongs to the technical field of bridge piers, and more specifically relates to a swinging self-resetting double-leg thin-walled rigid-frame bridge piers.

Background technique

Most of the mountainous areas in western my country are located in the active zone of geological plates. Since ancient times, earthquakes have occurred frequently, which will cause huge damage to transportation infrastructure. With the development of transportation infrastructure in the western region, the continuous rigid frame bridge has become the main bridge type across the canyon terrain in the western mountainous area due to its advantages of large spanning capacity, strong terrain adaptability, and moderate cost. The pier of the bridge is getting higher and higher, constantly refreshing the original record, which not only brings opportunities for the development of continuous rigid frame bridges, but also poses new problems for the design and construction of continuous rigid frame bridges.

If the height of the pier column is greater than 40m, the quality of the main beam and the mass of the pier column itself will have an important impact on its seismic response. If the isolation design of the support is used to prolong the overall period of the structure, it will be unfavorable for shock absorption. Therefore, in most cases, it is based on the idea of ductility design. The optimal design of the pier column section of the continuous rigid frame bridge relies on the bending deformation of the pier column itself to dissipate energy. However, the post-earthquake damage repair of the pier column is a major problem. The traditional ductile design of the post-earthquake pier damage is serious and the recovery period is long. , The cost of recovery is relatively high, even after the repair, there is still a gap between the performance of the pier and the intact pier.

Therefore, it is imperative to design a kind of ductile piers suitable for continuous rigid frame bridges.

Contents of the invention

In order to solve at least one of the above-mentioned technical problems, according to one aspect of the present invention, a swing self-resetting rigid-frame bridge double-leg thin-walled pier is provided, including:

platform;

The main beam, which is arranged directly above the cap;

Double-limb pier, which has two parallel pier columns, which are vertically arranged on the cap platform, and are used to support the main beam;

The structures at the joints of the double-leg piers, caps and main beams are all swing structures, which can swing at the joints; also include,

The prestressed steel bars are longitudinally fixed in each pier column of the double-limb pier, and one end of the prestressed steel bar protrudes from the end of the pier column of the double-limb pier and passes through the joint into the corresponding cap or main beam for fixation ;

The ductile steel bar is arranged at the joint between the double-leg pier, the cap and the main beam, and one end of the ductile steel bar is inserted into the end of the column of the double-limb pier to be fixed, and the other end is extended into the corresponding cap or the main beam to be fixed.

According to the double-leg thin-walled pier of a swinging self-resetting rigid frame bridge according to an embodiment of the present invention, optionally, there are several ductile steel bars, which are evenly arranged along the circumference of the end edge of the double-leg pier column.

According to the embodiment of the present invention, the double limb thin-walled pier of the swinging self-resetting rigid frame bridge, optionally,

The cross-sections at the joints between the double-leg pier and the cap are all arc-shaped surfaces that cooperate with each other;

The cross-sections at the joints between the double-leg pier and the main girder are arc-shaped surfaces that cooperate with each other;

The joints between the double-leg piers, caps and main girders are filled with rubber pads.

According to the embodiment of the present invention, the double-leg thin-walled pier of the swing self-resetting rigid-frame bridge optionally further includes an energy dissipation box, which is arranged between the two pier columns of the double-leg pier, and the two ends of the energy dissipation box are respectively connected to the The two piers are connected flexibly.

According to the thin-walled double-leg pier of a swaying self-resetting rigid frame bridge according to an embodiment of the present invention, optionally, the energy dissipation box includes:

The box body is a hollow box structure;

There is at least one damping hinge plate, which is movably inserted between the top surface and the bottom surface of the box body. The damping hinge plate includes a steel top plate, a steel bottom plate and a damping hinge plate. The steel top plate and the steel bottom plate are parallel to each other and Inserted on the top surface and the bottom surface of the box respectively, the damping hinge plate is connected between the steel top plate one and the steel bottom plate one;

The two ends of the damping hinge plate are respectively facing the two piers of the double-leg piers.

According to the thin-walled double-leg pier of a swaying self-resetting rigid frame bridge according to an embodiment of the present invention, optionally, the energy dissipation box includes:

The box body is a hollow box structure;

There is at least one profiled steel plate, which is movably inserted between the top surface and the bottom surface of the box body. The profiled steel plate includes a second steel top plate, a second steel bottom plate and a profiled steel plate. The second steel top plate and the second steel bottom plate are parallel to each other and Inserted on the top surface and bottom surface of the box respectively, the profiled steel plate is corrugated and connected between the second steel top plate and the second steel bottom plate;

The two ends of the profiled steel plate are respectively facing the two pier columns of the double-leg pier.

According to the thin-walled double-leg pier of a swaying self-resetting rigid frame bridge according to an embodiment of the present invention, optionally, the energy dissipation box includes:

The box body is a hollow box structure;

There are two damping hinge plates, which are arranged parallel to each other. The two ends of the damping hinge plates are respectively facing the two pier columns of the double-leg piers. The damping hinge plates are movably inserted between the top surface and the bottom surface of the box. The hinge plate includes steel top plate 1, steel bottom plate 1 and damping hinge plate. Steel top plate 1 and steel bottom plate 1 are parallel to each other and inserted on the top surface and bottom surface of the box respectively. The damping hinge plate is connected to steel top plate 1 and steel bottom plate 1. between;

There is a profiled steel plate, which is movably inserted between the top surface and the bottom surface of the box body. The profiled steel plate is arranged between the two damping hinge plates. The profiled steel plate includes steel top plate 2, steel bottom plate 2 and pressure The profiled steel plate, the steel top plate 2 and the steel bottom plate 2 are parallel to each other and respectively inserted on the top surface and the bottom surface of the box body, and the profiled steel plate is corrugated and connected between the steel top plate 2 and the steel bottom plate 2;

The filler is filled in the gap between the damping hinge plate and the profiled steel plate.

According to the double-leg thin-walled pier of a swaying self-resetting rigid frame bridge according to an embodiment of the present invention, optionally, the side of the profiled steel plate of the profiled steel insert plate is welded with studs.

According to the embodiment of the present invention, the double-leg thin-walled pier of the swaying self-resetting rigid frame bridge optionally further includes a corner damper, which includes:

Steel backing plate, which is pre-embedded on the side of the double-leg piers;

Sector-shaped rigid plates, several of which are formed on the side of the steel backing plate, and several sector-shaped rigid plates are arranged parallel to each other and at intervals;

The connecting plate is a flat plate with mounting holes penetrating through the edge;

There are several sector-shaped rigid plates, which are formed on the side of the connecting plate, and the sector-shaped rigid plates 2 are arranged parallel to each other and spaced apart, and the sector-shaped rigid plates 2 and sector-shaped rigid plates 1 are staggered and matched with each other through the interval;

Elastic material layer, elastic material layers are provided on both sides of sector-shaped rigid plate 1 and sector-shaped rigid plate 2;

Fasteners for clamping each sector-shaped rigid plate one and sector-shaped rigid plate two;

The pier bottom of the double-leg pier column is provided with a corner damper, and its connecting plate is fixedly connected with the top surface of the bearing platform.

According to the swinging self-resetting double-leg thin-walled pier of the rigid frame bridge according to the embodiment of the present invention, optionally, the energy dissipation box and the pier column of the double-leg pier are movably connected through a corner damper, and the connecting plate is the same as the energy dissipation box connect.

Beneficial effect

Compared with the prior art, the present invention at least has the following beneficial effects:

(1) In the double-leg thin-walled pier of the swing self-resetting rigid frame bridge of the present invention, the joints between each pier column of the double-leg pier and the cap and the main beam are in the form of a swing structure, forming a double-interface swing pier, and The double-leg piers are connected with the caps and the main girder through prestressed steel bars to improve the integrity of the bridge pier structure and ensure the overall stability of the bridge pier during the construction of the upper structure of the bridge pier. Moreover, the linear elastic characteristics of the prestressed steel bars can ensure the lateral seismic load. After the action, the prestressed steel bars can generate restoring force to return to the initial position without losing the lateral stability of the pier, and the ductile steel bars are set to prevent local relative slippage of the contact interfaces at the joints on the one hand, and ensure the pier’s stability on the other hand. The column interface has sufficient ductility and energy dissipation capacity. The self-resetting system of the swaying pier can be applied to long-span continuous rigid frame bridges with high piers, which is of great significance for improving the safety and disaster prevention capabilities of long-span bridges with high piers in mountainous areas , and the earthquake damage of the structure of the present invention is controllable, and the post-earthquake recovery speed is fast;

(2) The double-leg thin-walled pier of the swing self-resetting rigid frame bridge of the present invention, the cap, the main girder and the double-leg pier are all in the form of prefabrication, and the connection structure of prestressed steel bars and ductile steel bars is used to make the construction of the present invention convenient. Rapid construction can greatly speed up the construction progress and effectively reduce the risk of construction in dangerous areas such as mountainous areas;

(3) In the double-leg thin-walled pier of the swinging self-resetting rigid frame bridge of the present invention, arc-shaped surfaces that cooperate with each other are arranged at the interface of the joint to form a swing structure, and rubber pads are filled between the interfaces of the joint. The coordinated cooperation of the swing interface increases the effect of shock absorption and energy consumption, and on the other hand, it can alleviate the problem of concrete collision and crushing at the edge of the interface, and improve the effective service life of the bridge of the present invention;

(4) In the double-leg thin-walled pier of the swaying self-resetting rigid-frame bridge of the present invention, an energy-dissipating box is arranged between the columns of the double-limb pier, so that the energy-consuming box can be sheared and deformed when the double-limb pier undergoes longitudinal swinging motion, resulting in This can absorb most of the seismic energy input to the bridge pier, and become a fuse under a large earthquake, further improving the seismic capacity of the bridge;

(5) The double-leg thin-walled pier of the swaying self-resetting rigid frame bridge of the present invention has a variety of structural forms of the energy consumption box, and the energy consumption box equipped with damping hinge inserts can meet the energy consumption requirements of most use environments. The energy consumption box of the profiled steel plate is low in cost and is suitable for the use environment with low energy consumption demand. The energy consumption box of the damped hinge plate with the pressed steel plate and the filler has a strong energy consumption effect and is suitable for the use of high energy consumption. environment;

(6) The double-leg thin-walled pier of the swinging self-resetting rigid frame bridge of the present invention is aimed at the energy-dissipating box structure of the damping hinge plate and the profiled steel plate and the filler, and the studs are welded on both sides of the middle profiled steel plate, It can increase the extrusion with the filler, improve the damping, and further enhance the energy consumption effect;

(7) For the double-leg thin-walled pier of the swaying self-resetting rigid frame bridge of the present invention, a corner damper is installed at the bottom of the double-leg pier, which can generate a shock at the joint between the pier column and the cap when the pier column swings longitudinally. Rotational energy consumption;

(8) In the double-leg thin-walled pier of the swaying self-resetting rigid frame bridge of the present invention, the energy dissipation box is connected to the double-leg pier column through the corner damper, and the rotational energy consumption and the shearing energy consumption can fully cooperate with each other under the action of an earthquake. Play the role of energy consumption, and the energy consumption box can be easily and quickly replaced after the earthquake.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present invention, rather than limiting the present invention .

Fig. 1 shows the schematic diagram of the double-limb thin-walled piers of the rigid-frame bridge that swings and self-resets of the present invention;

Fig. 2 shows A-A cross-sectional schematic view;

Fig. 3 shows B-B cross-sectional schematic view;

Fig. 4 shows a schematic diagram of the state when the thin-walled piers with both limbs of the swinging self-resetting rigid frame bridge of the present invention are swinging;

Fig. 5 shows the schematic diagram of the structure of the energy consumption box of the present invention;

Figure 6 shows a schematic structural view of the corner damper of the present invention;

Fig. 7 shows a schematic diagram of another angle of view of the corner damper of the present invention;

Fig. 8 shows the schematic structural diagram of the energy consumption box of the present invention;

Fig. 9 shows a schematic structural diagram of the damping hinge plate of the present invention;

Fig. 10 shows the structural schematic diagram of the profiled steel insert plate of the present invention;

Reference signs:

1. Abutment;

2. Main beam;

3. Double limb pier;

4. Prestressed steel bars; 40. Fitted joints;

5. Ductility steel bar;

6. Energy consumption box; 60. Box body; 61. Damping hinge plate; 610. Steel top plate one; 611. Steel bottom plate one; 612. Damping hinge plate; 62. Profiled steel plate; 620. Steel top plate two; 621 , Steel bottom plate II; 622, profiled steel plate; 623, pegs; 63, filler;

7. Corner damper; 70. Steel backing plate; 71. Sector-shaped rigid plate 1; 72. Connecting plate; 73. Sector-shaped rigid plate 2; 74. Elastic material layer; 75. Fasteners;

100. Seams.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the following will clearly and completely describe the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention.

Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "One", "two" and similar words used in the specification and claims of the patent application of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components.

After research, the existing swing piers mainly have the following defects:

1. The structural details of the swinging piers are immature, and the installation of energy-dissipating components is relatively simple, resulting in very limited seismic effects. It is urgent to develop components and connecting joints with better comprehensive performance;

2. Swing piers are mainly low pier columns, which cannot be applied to high pier structures, and the actual needs of large displacement and large rotation of high pier structures cannot be met by the transformation of existing swing pier structures;

3. Most of the swinging piers are integral or segmental precast concrete single-column piers, which cannot be applied to double-leg thin-walled piers.

In view of the above problems, the present invention designs a swing self-resetting rigid-frame bridge double-leg thin-walled pier, which can solve the problems of high pier and long-span continuous rigid-frame bridge pier serious damage after earthquake, long recovery period, high recovery cost, etc. question.

Example 1

The double-limb thin-walled pier of the swinging self-resetting rigid frame bridge of this embodiment includes:

platform 1;

The main beam 2 is arranged directly above the platform cap 1;

Double-limb piers 3, which have two parallel pier columns, are vertically arranged on the cap 1, and are used to support the main beam 2;

The structures of the joints 100 between the double-leg pier 3 and the cap 1 and the main beam 2 are all swing structures, which can swing at the joints 100; also include,

The prestressed steel bars 4 are longitudinally fixed in each pier column of the double-limb pier 3, and one end of the prestressed steel bar 4 protrudes from the end of the pier column of the double-limb pier 3 and extends through the joint 100 into the corresponding cap 1 or fixed in the main beam 2;

The ductile steel bar 5 is arranged at the joint 100 between the double-leg pier 3 and the cap 1 and the main beam 2. One end of the ductile steel bar 5 extends into the end of the double-leg pier 3 for fixing, and the other end extends into the corresponding cap 1 Or fixed in main beam 2.

As shown in Fig. 1, Fig. 2 and Fig. 3, in this embodiment, the platform cap 1, the main beam 2 and the double-leg piers 3 are all prefabricated, and the double-leg piers 3 are composed of two mutually parallel and longitudinally arranged piers. The joints 100 between each pier column and the cap 1 and the main beam 2 are set in a swing structure, which can swing and rotate to a certain extent at the junction, thus forming a double-interface swing pier. , a prestressed channel is reserved longitudinally at the center of the cross section of each pier column of the double-leg pier 3, the prestressed steel bar 4 is arranged in the prestressed channel, and one end of the prestressed steel bar 4 protrudes from the end of the pier column , pass through the seam 100 and extend into the cap 1 or the main beam 2 corresponding to the pier column to be fixed. In this embodiment, there are four bundles of prestressed steel bars 4, which are respectively arranged at each end of each pier column. The ends of each bundle of prestressed steel bars 4 are anchored in the corresponding pier columns or caps 1 or main beams 2 with embedded joints 40, and the originally separately prefabricated pier columns and caps 1, main Beam 2 is clamped and connected to improve the integrity of the pier structure and ensure the overall stability of the pier during the construction of the superstructure of the pier, and the restoring force characteristics of the prestressed steel bar 4 can ensure that the prestressed steel bar 4 can generate restoring force after the lateral earthquake load is applied return to the initial position without losing the lateral stability of the pier; further, this embodiment is also equipped with ductile reinforcement 5, which is arranged at each joint 100, one end is embedded in the end of the pier column for internal fixation, and the other end is embedded in the corresponding The cap 1 or the main beam 2 is internally fixed, and the ductile reinforcement 5 can prevent the local relative slippage of the contact surfaces at the joint 100, and at the same time ensure that the pier-column interface has sufficient ductility and energy dissipation capacity. 5 and the prestressed steel bar 4 cooperate to form the self-resetting system of the swinging pier.

The double-leg thin-walled pier of the swinging self-resetting rigid frame bridge of this embodiment relies on the ductile steel bar 5 to dissipate energy when the earthquake action is small, and due to the preloading effect of the prestressed steel bar 4, the pier will not shake greatly. A small swing will occur and return to the initial position. At this time, the bridge resists the earthquake through its own strength. The bridge pier becomes soft, the stiffness of the bridge pier decreases, and the natural vibration period of the structure increases, thereby avoiding the excellent period of the earthquake. After the earthquake, the bridge pier will automatically return to the initial position after shaking with the help of prestressed steel bars 4. The structural earthquake damage is controllable, the post-earthquake recovery speed is fast, and the construction is convenient.

Example 2

The double-leg thin-walled pier of the swaying self-resetting rigid frame bridge of this embodiment is further improved on the basis of Embodiment 1. There are several ductile steel bars 5, which are along the circumferential direction of the edge of the end of the double-leg pier 3 pier columns. Arrange evenly.

As shown in Figure 1, in this embodiment, the joints 100 corresponding to the ends of each pier are provided with a plurality of ductile reinforcement bars 5, and the ductile reinforcement 5 is arranged at the edge of the end of the pier, and along the pier The ends are evenly arranged in the circumferential direction, further strengthening the limit effect, and strengthening the ductility and energy dissipation capacity of the double-leg piers 3 .

Example 3

The double-leg thin-walled pier of the swing self-resetting rigid frame bridge of this embodiment is further improved on the basis of embodiment 2, and the sections of the joints 100 between the double-leg pier 3 and the cap 1 are arcs that cooperate with each other. Shape;

The sections of the joints 100 between the double-leg pier 3 and the main beam 2 are arc-shaped surfaces that cooperate with each other;

The joints 100 between the double-leg pier 3 and the cap 1 and the main beam 2 are filled with rubber pads.

As shown in Figures 1 and 2, in this embodiment, the cross-sections of the pier columns of the double-leg pier 3 at the joint 100 and the sections at the corresponding positions of the cap 1 and the main beam 2 at the joint 100 are set as arcs that cooperate with each other. More specifically, in this embodiment, the bottom end of each pier is a downwardly convex arc, and the top surface of the platform 1 is provided with a matching downwardly concave arc at the corresponding seam 100. surface, the top surface of each pier column pier is an upwardly convex arc surface, and the bottom surface of the main beam 2 is provided with a matching upward concave arc surface corresponding to the seam 100, and further, filling between two adjacent arc surfaces at the seam 100 The elastic rubber pad is provided, on the one hand, it cooperates with the swing interface to increase the effect of shock absorption and energy consumption, on the other hand, it can alleviate the problem of concrete collision and crushing at the edge of the interface, and improve the effective service life of the bridge of the present invention.

Example 4

The double limb thin-walled pier of the swing self-resetting rigid frame bridge of this embodiment is further improved on the basis of embodiment 3, and also includes an energy consumption box 6, which is arranged between the two pier columns of the double limb pier 3, and consumes The two ends of the energy box 6 are respectively movably connected with two piers.

In order to further dissipate the seismic energy, an energy dissipation box 6 is set between the two pier columns of the double-leg pier 3 in this embodiment, as shown in Figure 1 and Figure 5, when the double-limb pier 3 undergoes longitudinal swing motion under the action of an earthquake , the pier column and the energy dissipation box 6 produce a corner at the joint, and the energy dissipation box 6 is sheared and deformed, so that it can absorb most of the seismic energy input to the pier, and become a fuse under a large earthquake, which can give priority to play under strong earthquakes The energy dissipation function protects the built-in ductile steel bar 5 and load-bearing components from damage or minor damage, and the energy dissipation box 6 is easy to replace after being damaged, and the recoverability after the earthquake is strong to further improve the earthquake resistance of the bridge.

The energy consumption box 6 of this embodiment has various structural forms.

Example 5

The double limb thin-walled pier of the swaying self-resetting rigid frame bridge of this embodiment is further improved on the basis of Embodiment 4, and the energy consumption box 6 includes:

The box body 60 is a hollow box structure;

Damping hinge plate 61, which has at least one, is movably inserted between the top surface and the bottom surface of the box body 60. The damping hinge plate 61 includes steel top plate 1 610, steel bottom plate 1 611 and damping hinge plate 612, steel top plate 1 610 Parallel to the steel bottom plate 1 611 and plugged into the top surface and the bottom surface of the box body 60 respectively, the damping hinge plate 612 is connected between the steel top plate 1 610 and the steel bottom plate 1 611;

The two ends of the damping hinge plate 61 respectively face the two piers of the double-leg piers 3 .

This embodiment shows a structural form of the energy consumption box 6 .

A plurality of slots are formed at corresponding positions on the top surface and the bottom surface of the box body 60 , the two ends of the slot length direction are respectively directed to two piers, and the damping hinge plate 61 is movably inserted into the slots in the box body 60 , and the damping hinge plate 61 is detachable and replaceable.

The damping hinge plate 61 of this embodiment is shown in Figure 9. The damping hinge plate 612 is fixed between the steel top plate 1 610 and the steel bottom plate 1 611 through hinged joints, and the steel top plate 1 610 and the steel bottom plate 1 611 are mated and inserted. In the slot of the box body 60, the hinges of the damping hinge plate 612 can be arranged in various forms. In FIG.

When the energy dissipation box 6 is sheared and deformed, the steel top plate 1 610 and the steel bottom plate 1 611 in the damping hinge plate 61 undergo relative displacement, which drives the hinge of the damping hinge plate 612 to deform, and when the damping hinge is deformed, damping will be generated for buffering , thus rapidly consuming energy.

The structure of the energy consumption box 6 in this embodiment can meet the energy consumption requirements of most usage environments.

Example 6

The double limb thin-walled pier of the swaying self-resetting rigid frame bridge of this embodiment is further improved on the basis of Embodiment 4, and the energy consumption box 6 includes:

The box body 60 is a hollow box structure;

Profiled steel insert 62, which has at least one, is movably inserted between the top surface and the bottom surface of the box body 60. The profiled steel insert 62 includes steel top plate 2 620, steel bottom plate 2 621 and profiled steel plate 622, steel top plate 2 620 It is parallel to the steel bottom plate 2 621 and plugged into the top surface and the bottom surface of the box body 60 respectively. The profiled steel plate 622 is corrugated and connected between the steel top plate 2 620 and the steel bottom plate 2 621;

The two ends of the profiled steel plate 62 respectively face the two piers of the double-leg pier 3 .

This embodiment shows another structural form of the energy consumption box 6 .

A plurality of slots are formed at corresponding positions on the top surface and the bottom surface of the box body 60 , the two ends of the slot length direction point to two piers respectively, and the profiled steel inserting plate 62 is movably inserted into the slots in the box body 60 , and the profiled steel plate 62 is detachable and replaceable.

The profiled steel plate 62 of this embodiment is shown in Figure 10. The profiled steel plate 622 is fixed between the steel top plate 2 620 and the steel bottom plate 621 by welding, and the steel top plate 620 and the steel bottom plate 2 621 are mated and plugged. In the slot of the box body 60 , the profiled steel plate 622 has a corrugated shape, which can dissipate energy when plastically deformed, and can be easily replaced afterwards.

When the energy consumption box 6 is sheared and deformed, the steel top plate 2 620 and the steel bottom plate 2 621 in the profiled steel insert plate 62 undergo relative displacement, which drives the profiled steel plate 622 to plastically deform, resulting in deformation energy consumption.

The structural form of the energy consumption box 6 in this embodiment has low cost and is suitable for use environments with little energy consumption demand.

Example 7

The double limb thin-walled pier of the swaying self-resetting rigid frame bridge of this embodiment is further improved on the basis of Embodiment 4, and the energy consumption box 6 includes:

The box body 60 is a hollow box structure;

There are two damping hinge plates 61 arranged parallel to each other. The two ends of the damping hinge plates 61 are respectively facing the two piers of the two-leg piers 3. The damping hinge plates 61 are movably connected to the top surface of the box body 60. Between the bottom and the bottom, the damping hinge plate 61 includes a steel top plate 610, a steel bottom plate 611 and a damping hinge plate 612. The steel top plate 610 and the steel bottom plate 611 are parallel to each other and inserted into the top and bottom surfaces of the box body 60 respectively. The damping hinge plate 612 is connected between the first steel top plate 610 and the first steel bottom plate 611;

Profiled steel plate 62, which has one, is movably inserted between the top surface and the bottom surface of the box body 60. The profiled steel plate 62 is arranged between the two damping hinge plates 61. The profiled steel plate 62 includes a steel top plate 2 620 1. The second steel bottom plate 621 and the profiled steel plate 622, the second steel top plate 620 and the second steel bottom plate 621 are parallel to each other and respectively plugged into the top and bottom surfaces of the box body 60, the profiled steel plate 622 is corrugated and connected to the second steel top plate 620 and Between the steel base plate 2 and 621;

The filler 63 is filled in the gap between the damping hinge plate 61 and the profiled steel plate 62 .

This embodiment shows another structural form of the energy consumption box 6, as shown in FIG. 8 .

Three slots are formed at the corresponding positions of the top surface and the bottom surface of the box body 60, and the two ends of the slot length direction are respectively directed to two piers, the middle slot is used for inserting the pressed steel plate 62, and the slots on both sides are used for To plug in the damping hinge plate 61.

The damping hinge plate 61 of this embodiment is shown in Figure 9. The damping hinge plate 612 is fixed between the steel top plate 1 610 and the steel bottom plate 1 611 through hinged joints, and the steel top plate 1 610 and the steel bottom plate 1 611 are mated and inserted. In the slot of the box body 60, the hinges of the damping hinge plate 612 can be arranged in various forms. In FIG.

The profiled steel plate 62 of this embodiment is shown in Figure 10. The profiled steel plate 622 is fixed between the steel top plate 2 620 and the steel bottom plate 621 by welding, and the steel top plate 620 and the steel bottom plate 2 621 are mated and plugged. In the slot of the box body 60 , the profiled steel plate 622 has a corrugated shape, which can dissipate energy when plastically deformed, and can be easily replaced afterwards.

In this embodiment, fillers 63 are filled between the boards. More specifically, polyurethane foam is used as the filler 63 in this embodiment, which has a good cushioning effect. When the energy consumption box 6 is sheared and deformed, the damping hinge Both the plate 61 and the profiled steel plate 62 are deformed to consume energy, and the side of the deformed profiled steel plate 622 and the chain rod of the damping hinge plate 612 will squeeze the polyurethane foam filler 63, so that the filler 63 Also give full play to the energy consumption effect.

The structural form of the energy consumption box 6 of this embodiment is suitable for use environments with high energy consumption requirements.

Example 8

The double-leg thin-walled pier of the swaying self-resetting rigid frame bridge in this embodiment is further improved on the basis of Embodiment 7. The profiled steel plate 622 of the profiled steel insert plate 62 is welded with pegs 623 on the side.

As shown in FIG. 10 , welding studs 623 on both sides of the profiled steel plate 622 can increase the extrusion with the filler 63 and improve damping.

Because the profiled steel plate 62 is located between the two damping hinge plates 61, as shown in Figure 8, the studs 623 are welded on both sides of the profiled steel plate 622, when the energy consumption box 6 is deformed, the two damping hinge plates 61 and the pressure The filler 63 between the shaped steel inserts 62 will be fully squeezed, which will further enhance the energy dissipation effect.

Example 9

The double limb thin-walled pier of the swaying self-resetting rigid frame bridge of this embodiment is further improved on the basis of Embodiment 8, and also includes a corner damper 7, which includes:

Steel backing plate 70, which is pre-embedded on the side of the two-leg pier 3 pier columns;

There are several sector-shaped rigid plates-71, which are formed on the side of the steel backing plate 70, and several sector-shaped rigid plates-71 are arranged parallel to each other and spaced apart;

The connecting plate 72 is a flat plate, and the edge is provided with mounting holes;

There are several sector-shaped rigid plates 73, which are formed on the side of the connecting plate 72. The sector-shaped rigid plates 2 73 are arranged parallel to each other and spaced apart. The sector-shaped rigid plates 2 73 and sector-shaped rigid plates 1 71 are staggered and matched with each other through the interval;

Elastic material layer 74, both sides of fan-shaped rigid board 1 71 and fan-shaped rigid board 2 73 are provided with elastic material layer 74;

Fastener 75, it clamps each sector-shaped rigid plate one 71 and sector-shaped rigid plate two 73;

The bottom of the pier column of the double-leg pier 3 is provided with a corner damper 7, and its connecting plate 72 is fixedly connected with the top surface of the bearing platform 1.

The corner damper 7 of the present embodiment is shown in Fig. 6 and Fig. 7, and its one end is fixed on the side of two-legged pier 3 pier column by pre-embedded steel backing plate 70, and the connecting plate 72 edge place of the other end offers installation hole, The connecting plate 72 can be installed at the corresponding position through the bolt connection structure, and the bolt structure can be disassembled to disconnect according to the requirement.

In this embodiment, a corner damper 7 is provided at the bottom of the pier column of the double-leg pier 3, and the connecting plate 72 of the corner damper 7 is fixedly connected with the top surface of the cap 1 at the bottom of the pier. , the joint between the pier column and the cap 1 generates a corner, thereby making the sector-shaped rigid plate 1 71 and the sector-shaped rigid plate 2 73 rotate relative to each other. Since each sector-shaped rigid plate 1 71 and sector-shaped rigid plate 2 73 are clamped, the sector-shaped rigid plate The elastic material layers 74 on both sides of the first 71 and the sector-shaped rigid plate 2 73 squeeze and rub against each other, so that the corner damper 7 rotates and dissipates energy.

Example 10

The double-leg thin-walled pier of the swaying self-resetting rigid frame bridge in this embodiment is further improved on the basis of embodiment 9, and the energy dissipation box 6 is movably connected with the pier column of the double-leg pier 3 through a corner damper 7, Its connecting plate 72 is identically connected with the energy consumption box 6 .

As shown in Figure 5, in this embodiment, steel backing plates 70 are pre-embedded on the sides of the two-leg piers 3 pier columns corresponding to the joints of the energy dissipation boxes 6, and the connecting plates 72 of the corner dampers 7 are respectively connected to the energy dissipation units through bolt structures. The top surface and the bottom surface of the box body 60 of the box 6. Therefore, when a corner is generated at the connection node between the pier column and the energy dissipation box 6, the rotation energy consumption of the corner damper 7 cooperates with the shear energy consumption of the energy dissipation box 6. Give full play to the energy dissipation effect, thereby absorbing most of the seismic energy input to the bridge pier, and based on the structural characteristics of the corner damper 7, the energy dissipation box 6 can be conveniently and quickly replaced after an earthquake.

Furthermore, under earthquake action, if the bridge structure system is a conventional non-swaying double-pier structure, the energy dissipation box 6 is set between the two pier columns. At this time, the angular displacement between the energy dissipation box 6 and the pier column is θ, and the energy dissipation box The shear deformation of 6 itself is longitudinal unidirectional shear deformation, and when the structural system is the double-leg thin-walled pier structure system of the swing self-resetting rigid frame bridge in this embodiment, the angular displacement between the energy dissipation box 6 and the pier column is (θ+ε), the shear deformation of the energy dissipation box 6 itself becomes longitudinal and vertical two-way shear deformation; As the corner increases, the corner damper 7 can play a better role in energy dissipation, and the energy dissipation box 6 is lighter than traditional concrete tie beams and is easy to replace and connect, and has better energy dissipation performance than I-shaped steel tie beams , and after the pier sway, its shear displacement is longitudinal and vertical, which can fully exert its shear resistance for energy dissipation.

The double-leg thin-walled pier of the swaying self-resetting rigid frame bridge of this embodiment relies on the ductile steel bar 5 to dissipate energy when the earthquake action is small, and due to the preloading effect of the prestressed steel bar 4, the pier will not sway or only Slight sway and can return to the initial position, at this time the bridge resists the earthquake through its own strength; when the earthquake is strong, the pier will sway to a certain extent at the joint 100 of the cap 1 and the main girder 2, as shown in Figure 4 As shown, at this time, the pier becomes soft, the stiffness of the pier decreases, and the natural vibration period of the structure increases, thereby avoiding the excellent period of the ground motion. At the same time, the two-leg pier 3 swings longitudinally. The energy dissipation box 6 generates a corner at the node, the corner damper 7 rotates to consume energy, and the energy dissipation box 6 shears and deforms to consume energy. The two displacement dampers can work together to play the role of energy dissipation components under the action of an earthquake, and can absorb Most of the seismic energy is input into the piers, and both of them can be quickly replaced after the earthquake, which becomes the energy-dissipating fuse under a large earthquake. In addition, the section of the joint between the pier body and the cap 1 and the joint section of the pier body and the main girder 2 Additional rubber pads are added for cushioning and shock absorption design, and the overall shock absorption design of the new swing bridge pier is completed in coordination with the swing design. After the earthquake, the bridge pier will automatically return to the initial position after swinging with the help of prestressed steel bars 4. The swing self-resetting rigid structure of the present invention The thin-walled pier system of the two limbs of the bridge has the advantages of controllable earthquake damage and rapid recovery of functions after strong earthquakes. The mechanical mechanism of energy-dissipating beams is clear, easy to design, easy to install, and easy to disassemble.

The examples described in the present invention are only to describe the preferred implementation of the present invention, and are not intended to limit the concept and scope of the present invention. Variations and improvements should fall within the protection scope of the present invention.

Claims (6)

1. A kind of thin-walled piers with double limbs of a rigid frame bridge that swings and self-resets, comprising, platform; The main beam, which is arranged directly above the cap; Double-limb pier, which has two parallel pier columns, which are vertically arranged on the cap platform, and are used to support the main beam; It is characterized by: The structures at the joints of the double-leg piers, caps and main beams are all swing structures, which can swing at the joints; also include, The prestressed steel bars are longitudinally fixed in each pier column of the double-limb pier, and one end of the prestressed steel bar protrudes from the end of the pier column of the double-limb pier and passes through the joint into the corresponding cap or main beam for fixation ; The ductile reinforcement is arranged at the joint between the double-leg pier and the cap and the main beam. One end of the ductile reinforcement is extended into the end of the double-limb pier column for fixing, and the other end is extended into the corresponding cap or main beam for fixation; The energy consumption box is arranged between the two pier columns of the double-limb pier, and the two ends of the energy consumption box are respectively connected with the two pier columns; The energy consumption box includes: The box body is a hollow box structure; There is at least one damping hinge plate, which is movably inserted between the top surface and the bottom surface of the box body. The damping hinge plate includes a steel top plate, a steel bottom plate and a damping hinge plate. The steel top plate and the steel bottom plate are parallel to each other and Inserted on the top surface and the bottom surface of the box respectively, the damping hinge plate is connected between the steel top plate one and the steel bottom plate one; The two ends of the damping hinge plate are respectively facing the two pier columns of the double-limb pier; Corner dampers, which include: Steel backing plate, which is pre-embedded on the side of the double-leg piers; Sector-shaped rigid plates, several of which are formed on the side of the steel backing plate, and several sector-shaped rigid plates are arranged parallel to each other and at intervals; The connecting plate is a flat plate with mounting holes penetrating through the edge; There are several sector-shaped rigid plates, which are formed on the side of the connecting plate, and the sector-shaped rigid plates 2 are arranged parallel to each other and spaced apart, and the sector-shaped rigid plates 2 and sector-shaped rigid plates 1 are staggered and matched with each other through the interval; Elastic material layer, elastic material layers are provided on both sides of sector-shaped rigid plate 1 and sector-shaped rigid plate 2; Fasteners for clamping each sector-shaped rigid plate one and sector-shaped rigid plate two; The pier bottom of the double-leg pier column is provided with a corner damper, and its connecting plate is fixedly connected with the top surface of the cap; The energy consumption box is movably connected with the pier column of the double-leg pier through a corner damper, and its connecting plate is connected in the same way as the energy consumption box. 2. A swaying self-resetting double-leg thin-walled pier of a rigid frame bridge according to claim 1, characterized in that there are several ductile steel bars, which are evenly arranged along the circumference of the end edges of the double-leg pier columns . 3. A swing self-resetting rigid-frame bridge double-leg thin-walled pier according to claim 1, characterized in that: The cross-sections at the joints between the double-leg pier and the cap are all arc-shaped surfaces that cooperate with each other; The cross-sections at the joints between the double-leg pier and the main girder are arc-shaped surfaces that cooperate with each other; The joints between the double-leg piers, caps and main girders are filled with rubber pads. 4. A swaying self-resetting double-leg thin-walled pier of a rigid frame bridge according to claim 1, wherein the energy dissipation box comprises: The box body is a hollow box structure; There is at least one profiled steel plate, which is movably inserted between the top surface and the bottom surface of the box body. The profiled steel plate includes a second steel top plate, a second steel bottom plate and a profiled steel plate. The second steel top plate and the second steel bottom plate are parallel to each other and Inserted on the top surface and bottom surface of the box respectively, the profiled steel plate is corrugated and connected between the second steel top plate and the second steel bottom plate; The two ends of the profiled steel plate are respectively facing the two pier columns of the double-leg pier. 5. A swinging self-resetting rigid-frame bridge double-leg thin-walled pier according to claim 1, wherein the energy dissipation box comprises: The box body is a hollow box structure; There are two damping hinge plates, which are arranged parallel to each other. The two ends of the damping hinge plates are respectively facing the two pier columns of the double-leg piers. The damping hinge plates are movably inserted between the top surface and the bottom surface of the box. The hinge plate includes steel top plate 1, steel bottom plate 1 and damping hinge plate. Steel top plate 1 and steel bottom plate 1 are parallel to each other and inserted on the top surface and bottom surface of the box respectively. The damping hinge plate is connected to steel top plate 1 and steel bottom plate 1. between; There is a profiled steel plate, which is movably inserted between the top surface and the bottom surface of the box body. The profiled steel plate is arranged between the two damping hinge plates. The profiled steel plate includes steel top plate 2, steel bottom plate 2 and pressure The profiled steel plate, the steel top plate 2 and the steel bottom plate 2 are parallel to each other and respectively inserted on the top surface and the bottom surface of the box body, and the profiled steel plate is corrugated and connected between the steel top plate 2 and the steel bottom plate 2; The filler is filled in the gap between the damping hinge plate and the profiled steel plate. 6 . The double-leg thin-walled pier of a swaying self-resetting rigid frame bridge according to claim 5 , characterized in that: the side of the profiled steel plate of the profiled steel insert is welded with studs.

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