CN211621180U

CN211621180U - Self-resetting integral flexible abutment

Info

Publication number: CN211621180U
Application number: CN201922390533.6U
Authority: CN
Inventors: 黄福云; 何凌峰; 王森; 单玉麟; 刘征峰
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-10-02
Anticipated expiration: 2029-12-27

Abstract

The utility model relates to a from integral flexible abutment of restoring to throne, its characterized in that: including girder, draw board, the wiring road surface that sets gradually, from last down be equipped with main abutment, cushion cap in proper order between girder and the draw board, be equipped with the secondary abutment between draw board and the wiring road surface, all be equipped with the platform back and fill out soil on main abutment and the secondary abutment of draw board and wiring road surface below, draw through the prestressing tendons between main abutment and the cushion cap and tie as an organic whole, the angle steel has been connect to the linking department spiro union of main abutment and cushion cap. The self-resetting integral flexible abutment has a simple structure.

Description

Self-resetting integral flexible abutment

Technical Field

The utility model relates to a from integral flexible abutment of restoring to throne.

Background

The seismic problem of bridges is always the focus of attention in the engineering and academic circles. Although the bridge design specifications of various countries have detailed anti-seismic design methods and requirements, a plurality of bridges still have failure and collapse in every earthquake. China is a multi-earthquake country, and earthquake activities are frequent and high in magnitude. Seismic activity is mainly distributed in southwest, northwest, south China, Taiwan strait and other areas, and bridges are distributed more in these areas. Although the seamless bridge has better earthquake-resistant performance than the seam bridge, the research on the earthquake resistance is still a very important subject.

The upper structure and the lower structure of the integral bridge are connected into a whole, expansion joints, supports and bridge abutments are not arranged, and the integral bridge is characterized by adopting a flexible foundation; the longitudinal bridge deformation of the upper structure is accommodated by the lower structure and the foundation, which is the deformation characteristic of the integral bridge. The whole bridge has higher redundancy, the occurrence of beam falling when earthquake and flood are avoided, and the damage of wing walls and supports is reduced or avoided. In a high-intensity earthquake active area, the whole bridge is undoubtedly a very suitable bridge type. However, even if the earthquake-resistant calculation is carried out on a specific integral bridge, at present, few research reports are available, and only the general bridge earthquake-resistant design method can be used for processing. The reason is that in the dynamic analysis of the whole bridge, a key problem which is how to deal with the interaction between the soil body and the structure, including the anti-seismic action between the platform and the post soil, the pile and the pile soil, and the possible guide plate and the roadbed or the wiring road surface, is not solved well. At the abutment, the abutment deformation depends on the relative stiffness of the abutment, the pile foundations and the decking, and the lateral stiffness of the post-abutment soil and the pile-side soil. Conversely, the response of the post-abutment soil is related to the deformation of the abutment.

Just because the substructure and the superstructure of the integral bridge are connected into a whole, the dynamic characteristics and the earthquake-resistant performance analysis of the integral bridge are different compared with the traditional slotted bridge. The integral bridge has the advantages of good integrity and high redundancy and has certain adverse factors under the action of earthquake. After the main beam and the bridge abutment are connected into a whole, the structural rigidity is increased, the period is reduced, the total seismic shear force is larger than that of the traditional seam bridge, and most of the total seismic shear force is borne by the bridge abutment pile foundation, so that the pile foundation can bear higher seismic action, and the bridge abutment is one of the weakest parts of the whole bridge.

For a transverse bridge, the post-abutment soil basically cannot play a role, and the first-order vibration mode of the whole bridge is generally in the transverse bridge direction, so that the transverse bridge direction damage of a pile foundation and an abutment is more prone to occur under the action of an earthquake.

The bridge abutment has good transverse self-resetting capability and high energy consumption capability, and transverse damage and damage of the bridge abutment are reduced to a certain extent.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of prior art, the utility model aims to solve the technical problem that a from flexible abutment of integral of restoring to throne is provided, simple structure not only, convenient high efficiency moreover.

In order to solve the technical problem, the technical scheme of the utility model is that: the utility model provides a from integral flexible abutment of restoring to throne, is including the girder that sets gradually, draw the board, the wiring road surface, from last main abutment, cushion cap down being equipped with in proper order between girder and the draw board, draw and be equipped with the secondary abutment between board and the wiring road surface, all be equipped with the platform back and fill out soil on main abutment and the secondary abutment of draw board and wiring road surface below, draw through the prestressing tendons between main abutment and the cushion cap as an organic whole, the linking department spiro union of main abutment and cushion cap has the angle steel.

Preferably, the main abutment is an integral abutment of a thin-wall flexible abutment body, and the secondary abutment is a thick-wall abutment body.

Preferably, a plurality of angle steels are symmetrically arranged on two sides of the longitudinal bridge direction and the transverse bridge direction.

Preferably, the angle steel is fixedly connected with the main bridge abutment and the bearing platform respectively by bolts.

Preferably, the prestressed tendons are vertical unbonded prestressed tendons.

Preferably, the prestressed tendons vertically penetrate through the main bridge abutment and the bearing platform and are symmetrically arranged on two sides of the abutment body, and two ends of the prestressed tendons are respectively anchored at the top of the main bridge abutment and the bottom of the bearing platform.

Preferably, the foundation is arranged below the bearing platform.

Compared with the prior art, the utility model discloses following beneficial effect has: thereby utilize the fender soil function of secondary abutment to reduce the after-abutment soil pressure of main abutment, thereby can make thin with main abutment platform body, so that utilize the flexibility of main abutment thin wall platform body, provide the horizontal from the anti-overturning ability under the reset capacity and the major earthquake effect of main abutment through vertical unbonded prestressing tendons, usable power consumption angle steel improves anti lateral rigidity and power consumption ability, the power consumption angle steel that damages after the earthquake can replace fast, realize the quick recovery of function after the structure shakes. The combination of the prestressed tendons and the energy-consuming angle steel has good transverse self-resetting capability and higher energy-consuming capability, and can reduce the damage and the damage of the main abutment to a certain extent.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a side view of an embodiment of the present invention.

Fig. 2 is a partially enlarged view B of fig. 1.

Fig. 3 is an elevation view of the main abutment and cap.

3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 a 3- 3 a 3 of 3 the 3 main 3 abutment 3 of 3 fig. 3 1 3. 3

Detailed Description

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

As shown in fig. 1-4, the self-resetting integral flexible abutment comprises a main beam 1, a guide plate 2 and a wiring road surface 9 which are sequentially arranged, a main abutment 3 and a bearing platform 4 are sequentially arranged between the main beam and the guide plate from top to bottom, a secondary abutment 8 is arranged between the guide plate and the wiring road surface, the main abutment and the secondary abutment below the guide plate and the wiring road surface are respectively provided with a post-abutment filling soil 10, the main abutment and the bearing platform are connected into a whole through a prestressed rib 7, and an angle steel 6 is screwed at the joint of the main abutment and the bearing platform.

The embodiment of the utility model provides an in, main abutment is the integral abutment of the flexible abutment body of thin wall, and inferior abutment is the thick wall abutment body.

The embodiment of the utility model provides an in, the angle steel is in the equal symmetrical arrangement in vertical bridge to, horizontal bridge to both sides a plurality of.

The embodiment of the utility model provides an in, adopt the bolt to the angle steel respectively with main bridge platform and cushion cap fixed connection.

The embodiment of the utility model provides an in, prestressing tendons is vertical unbonded prestressing tendons.

The embodiment of the utility model provides an in, vertical main abutment and the cushion cap of running through of prestressing tendons, symmetrical arrangement is in the platform body both sides, and the prestressing tendons both ends anchor respectively in main abutment top and cushion cap bottom.

In the embodiment of the present invention, the base 5 is below the platform.

The application of the self-resetting integral flexible bridge abutment is to apply the self-resetting integral flexible bridge abutment to an integral bridge.

The present invention is not limited to the above preferred embodiments, and any person can obtain various other forms of self-resetting integral flexible abutment under the teaching of the present invention. All the equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims

1. A self-resetting integral flexible abutment is characterized in that: including girder, draw board, the wiring road surface that sets gradually, from last down be equipped with main abutment, cushion cap in proper order between girder and the draw board, be equipped with the secondary abutment between draw board and the wiring road surface, all be equipped with the platform back and fill out soil on main abutment and the secondary abutment of draw board and wiring road surface below, draw through the prestressing tendons between main abutment and the cushion cap and tie as an organic whole, the angle steel has been connect to the linking department spiro union of main abutment and cushion cap.

2. The self-resetting monolithic flexible abutment of claim 1, wherein: the main abutment is a thin-wall flexible abutment body integrated abutment, and the secondary abutment is a thick-wall abutment body.

3. The self-resetting monolithic flexible abutment of claim 1, wherein: the angle steel has a plurality of in vertical bridge direction, horizontal bridge to both sides symmetrical arrangement.

4. The self-resetting monolithic flexible abutment of claim 1, wherein: and the angle steel is fixedly connected with the main bridge abutment and the bearing platform respectively by bolts.

5. The self-resetting monolithic flexible abutment of claim 1, wherein: the prestressed tendons are vertical unbonded prestressed tendons.

6. The self-resetting monolithic flexible abutment of claim 1, wherein: the prestressed tendons vertically penetrate through the main bridge abutment and the bearing platform and are symmetrically arranged on two sides of the abutment body, and two ends of the prestressed tendons are respectively anchored at the top of the main bridge abutment and the bottom of the bearing platform.

7. The self-resetting monolithic flexible abutment of claim 1, wherein: the lower part of the bearing platform is taken as a foundation.