CN218540369U

CN218540369U - Prestressed concrete self-resetting pier connected in mortise and tenon mode

Info

Publication number: CN218540369U
Application number: CN202222990874.9U
Authority: CN
Inventors: 刘国东; 王占飞
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-02-28
Anticipated expiration: 2032-11-10

Abstract

The utility model relates to a bridge construction technical field, concretely relates to prestressed concrete of mortise type connection is from restoring to throne pier. The technical scheme of the utility model as follows: including bent cap, pier upper segment, pier hypomere, concrete cushion cap, prestressing force steel strand wires, ground tackle and power consumption reinforcing bar, the pier hypomere is fixed to be set up on the concrete cushion cap, and the upper end of pier hypomere is equipped with the tenon, and the lower extreme of pier upper segment is equipped with the tongue-and-groove, and the pier upper segment passes through tongue-and-groove and tenon cooperation installation with the pier hypomere, the bent cap sets up in pier upper segment top, and prestressing force steel strand wires set up the center department of bent cap, pier upper segment, pier hypomere and concrete cushion cap and the both ends of prestressing force steel strand wires pass through the ground tackle is anchored, vertically is equipped with many power consumption reinforcing bars in pier upper segment, pier hypomere and the concrete cushion cap. The utility model provides a prestressed concrete of mortise type connection is from restoring to throne pier, existing good power consumption ability and reset capability have better bearing capacity again.

Description

Prestressed concrete self-resetting pier connected in mortise and tenon mode

Technical Field

The utility model relates to a bridge construction technical field, concretely relates to prestressed concrete of mortise type connection is from restoring to throne pier.

Background

The traditional cast-in-place pier has the advantages of simple construction, mature construction process, high pier bearing capacity and good ductility, but has long construction period and poor recoverability after earthquake, has great influence on the surrounding environment and seriously hinders the traffic transportation of roads.

The assembly type pier adopts the technologies of factory production and field assembly, improves the mechanical construction level, ensures the engineering quality, accelerates the construction progress and is beneficial to environmental protection; however, the segments of the fabricated assembled pier are connected by adopting dry joints or wet joints, and the seismic performance is poorer than that of a cast-in-place pier.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prestressed concrete of mortise type connection is from restoring to throne pier, existing good power consumption ability and reset ability have better bearing capacity again.

The technical scheme of the utility model as follows:

the utility model provides a prestressed concrete of mortise-tenon joint formula connection is from restoring to throne pier, includes bent cap, pier upper segment, pier hypomere, concrete cushion cap, prestressing steel strand wires, ground tackle and power consumption reinforcing bar, and the pier hypomere is fixed to be set up on the concrete cushion cap, and the upper end of pier hypomere is equipped with the tenon, and the lower extreme of pier upper segment is equipped with the tongue-and-groove, and the pier upper segment passes through tongue-and-groove and tenon cooperation installation with the pier hypomere, the bent cap sets up in pier upper segment top, and the prestressing steel strand wires sets up the center department of bent cap, pier upper segment, pier hypomere and concrete cushion cap and the both ends of stranded wire pass through the ground tackle is anchored, and pier upper segment, pier hypomere and concrete cushion cap are interior vertical to be equipped with many power consumption reinforcing bars.

Furthermore, the prestressed concrete self-resetting pier of mortise-tenon joint formula connection, the part that the power consumption reinforcing bar is located the junction between pier upper segment and the pier hypomere is equipped with the sleeve pipe and does not have the bondn with structure on every side.

Furthermore, the prestressed concrete self-resetting pier in mortise and tenon joint type connection is characterized in that the number of the energy dissipation steel bars is not less than four, and the energy dissipation steel bars are distributed around the prestressed steel strands.

Furthermore, the lower end of the upper section of the pier is provided with a first steel plate, and the first steel plate is attached to the mortise; and a second steel plate is arranged at the upper end of the lower section of the pier and is attached to the tenon.

Furthermore, the prestressed concrete self-resetting bridge pier connected in the mortise and tenon manner is characterized in that steel reinforcement frameworks are arranged in the bent cap, the upper section of the bridge pier, the lower section of the bridge pier and the concrete bearing platform.

The beneficial effects of the utility model are that:

1. the utility model discloses a from restoring to throne pier comprises basic bearing member, from restoring to throne component, power consumption component, through being connected between reduction pier stud and cushion cap or pier stud and the pier stud to the energy in the power consumption component consumed the earthquake, with resume the deformation of pier from restoring to throne the component. Based on the design concept of an assembly technology and a self-resetting technology, the mortise and tenon joint type connecting structure between the piers is provided, and the mortise and tenon joint adopts a concave-convex combination connecting mode on two components. The convex part is called tenon (or tenon); the concave part is called as mortise (mortise slot), and plays a role in connection through the matching of the mortise and the tenon. Through the combination of tenon fourth of twelve earthly branches structure and steel sheet, the effectual crooked and the local conquassation of concrete structure that has restricted between the pier component, make pier monolithic phase together through power consumption reinforcing bar and prestressing steel strand wires, not only improved the overall stability of assembled and pier anti lateral force performance, significantly reduced construction period again and to the influence of traffic environment. The structure has good energy consumption capability and resetting capability and good bearing capability.

2. The utility model discloses when the earthquake, certain bending deformation takes place at first for the pier, then the power consumption reinforcing bar begins the effect, offsets the energy that partly earthquake brought, makes it have good power consumption ability, and the effect that sets up the unbonded section is the bigger damage that prevents that the power consumption reinforcing bar from bringing for the pier when crooked to this has improved the anti-seismic performance of pier.

3. The utility model discloses a concrete pier seam crossing adopts mortise-tenon joint formula to connect to the surface respectively sets up the one deck steel sheet about the seam, can open-ended and the high elastic performance of steel construction through seam crossing, has reduced concrete structure local conquassation under the horizontal loading effect, thereby has improved pier anti-seismic performance.

4. When an earthquake occurs, the prestressed steel strands can pull the concrete pier back to the initial position, so that residual deformation after the earthquake is reduced, and the pier can still normally work.

5. The utility model discloses the construction is simple and convenient, has reduced environmental pollution, quality safety, facilitate promotion.

Drawings

FIG. 1 is a schematic view of the overall structure of a tenon-and-mortise connected prestressed concrete self-resetting pier;

FIG. 2 is a schematic view of an upper section of a bridge pier and a lower section of the bridge pier before fitting;

FIG. 3 isbase:Sub>A schematic cross-sectional view of the reinforcement bar of FIG. 2A-A;

FIG. 4 is a schematic cross-sectional view of the reinforcement bar of FIG. 2 taken along line B-B;

FIG. 5 is a schematic view of a mortise-tenon joint structure;

fig. 6 is a schematic view of a deformed state of a pier.

Detailed Description

As shown in fig. 1-4, a prestressed concrete self-resetting pier with mortise and tenon type connection comprises a capping beam 1, an upper pier section 2, a lower pier section 3, a concrete bearing platform 5, prestressed steel strands 9, an anchorage device 7 and energy-consuming steel bars 4, wherein the lower pier section 3 is fixedly arranged on the concrete bearing platform 5, a tenon 11 is arranged at the upper end of the lower pier section 3, a mortise 10 is arranged at the lower end of the upper pier section 2, the upper pier section 2 and the lower pier section 3 are installed in a matched mode through the mortise 10 and the tenon 11, the capping beam 1 is arranged above the upper pier section 2, the prestressed steel strands 9 are arranged at the centers of the capping beam 1, the upper pier section 2, the lower pier section 3 and the concrete bearing platform 5, two ends of the prestressed steel strands 9 are anchored through the anchorage device 7, and eight energy-consuming steel bars 4 are vertically arranged in the upper pier section 2, the lower pier section 3 and the concrete bearing platform 5 and are distributed around the prestressed steel strands 9. The part of the energy-consuming reinforcing steel bar 4, which is positioned at the joint between the upper pier section 2 and the lower pier section 3, is provided with a sleeve which is not bonded with the surrounding structure. The lower end of the upper section 2 of the bridge pier is provided with a first steel plate 8, and the first steel plate 8 is attached to the mortise 10; and a second steel plate 12 is arranged at the upper end of the lower section 3 of the pier, and the second steel plate 12 is attached to the tenon 11. The steel bar frameworks 6 are arranged in the bent cap 1, the upper pier section 2, the lower pier section 3 and the concrete bearing platform 5; and after the upper pier section 2 and the lower pier section 3 are assembled, the joint is anchored through grouting 13.

As shown in FIG. 5, the tenon 11 has a length l _t The steel bars are not too large, the number of the longitudinal steel bars in the tenon 11 is not less than 4, and the diameter is not less than 10mm; the wall thickness T of the mortise 10 is not too small, and the thickness of a protective layer is reserved; when prefabricating the upper section 2 of the pier and the lower section 3 of the pier, the length l of the tenon 11 _t Should be slightly less than the depth l of the mortise 10 _c 11 width T of tenon _t Should be slightly smaller than the width T of the mortise 10 _c The width T of the first steel plate 8 and the second steel plate 12 is smaller than the wall thickness T of the mortise 10.

As shown in fig. 6, in the figure: f _PT : tension of prestressed strand, F _G : superstructure load, Δ: horizontal displacement applied, L distance from the upper structure load acting point to the bottom of the bridge pier, L _C Height of bridge pier theta _r : the horizontal displacement angle of the pier, D is the diameter of the section of the pier column, delta _ED : elongation, delta, of energy-consuming reinforcing bars _PT : elongation of prestressed steel strand, d _ed : distance from the outermost side under pressure to the energy-consuming reinforcing bar, d _pt : the distance from the outermost side to the prestressed steel strand under compression, c: the height of the compression zone at the bridge pier joint is high. Under the action of earthquake horizontal force, the pier is firstly subjected to bending deformation, the energy-consuming steel bars 4 begin to play a role, the pier begins to swing, and the horizontal displacement angle theta of the pier is increased along with the continuous increase of the horizontal displacement delta _r Continuously increased, 9 pulling forces F of prestressed steel strands _PT And increasing, wherein the energy-consuming steel bars 4 and the prestressed steel strands 9 resist the earthquake together, then the load continues to increase, the tenon 11 and the mortise 10 between the joints of the upper section 2 of the pier and the lower section 3 of the pier begin to play a role, the damage to the joints of the pier is effectively limited through the interaction between the first steel plate 8 and the second steel plate 12, the local collapse of the pressed side of the pier is prevented, and then the earthquake resistance is continuously provided through the swinging performance. And after the earthquake load is unloaded, restoring the pier to the original position by utilizing the tensile force of the prestressed steel strand 9.

Claims

1. The utility model provides a prestressed concrete of mortise-tenon joint formula connection is from restoring to throne pier, a serial communication port, including bent cap, pier upper segment, pier hypomere, concrete cushion cap, prestressed steel strand wires, ground tackle and power consumption reinforcing bar, the pier hypomere is fixed to be set up on the concrete cushion cap, and the upper end of pier hypomere is equipped with the tenon, and the lower extreme of pier upper segment is equipped with the tongue-and-groove, and the pier upper segment passes through the tongue-and-groove with the pier hypomere and the tenon cooperation installation, the bent cap sets up in pier upper segment top, and the prestressed steel strand wires sets up the center department of bent cap, pier upper segment, pier hypomere and concrete cushion cap and the both ends of prestressed steel strand wires pass through give the ground tackle anchor, vertically be equipped with many power consumption reinforcing bars in pier upper segment, the pier hypomere and the concrete cushion cap.

2. The tenon-and-mortise connected prestressed concrete self-resetting pier according to claim 1, wherein the part of the energy dissipation steel bars at the joint between the upper section of the pier and the lower section of the pier is provided with a sleeve which is not bonded with the surrounding structure.

3. The mortise-and-tenon joint type prestressed concrete self-resetting pier according to claim 1, wherein the number of the energy-consuming steel bars is not less than four, and the energy-consuming steel bars are distributed around the prestressed steel strands.

4. The tenon-and-mortise connected prestressed concrete self-resetting pier according to claim 1, wherein a first steel plate is arranged at the lower end of the upper section of the pier, and the first steel plate is attached to the mortise; and a second steel plate is arranged at the upper end of the lower section of the pier and is attached to the tenon.

5. The mortise-tenon joint type prestressed concrete self-resetting pier according to claim 1, wherein a steel reinforcement framework is arranged in each of the capping beam, the upper pier section, the lower pier section and the concrete bearing platform.