CN221877727U - Novel railway self-resetting bridge pier with replaceable energy consumption device - Google Patents

Abstract

The utility model relates to a new type of railway self-resetting bridge pier with a replaceable energy dissipation device. The utility model is composed of a bridge pier, a platform, a combined disc spring, a friction rubber, a threaded steel rod, a nut, a movable baffle and a fixed baffle. First, the combined disc spring is installed in the preset groove of the platform, the steel rod with threads passes through the combined disc spring and the fine holes of the groove of the platform, and the unthreaded end is anchored on the platform, so that the fixed baffle and the bottom of the groove of the platform are in close contact with the upper and lower edges of the combined disc spring, and then the friction rubber and the movable baffle are passed through the steel rod with threads in turn, and finally the nut is installed on the threaded end. The pressure is provided by the bolt preload force, so that the friction rubber is compressed and deformed to squeeze and contact with the inner wall of the groove of the platform. The utility model has a simple structure, clear force, simple installation, reliable performance, low cost, and can be easily replaced after damage.

Description

A new type of railway self-resetting bridge pier with replaceable energy dissipation device

Technical Field

The utility model relates to a novel railway self-resetting pier with a replaceable energy dissipation device, specifically a railway self-resetting pier with a combined disc spring and friction rubber arranged on a platform at the bottom of the pier. The railway self-resetting pier is provided with a platform at the bottom of the pier, and a groove is provided on the upper surface of the platform. A combined disc spring and friction rubber are arranged in the groove, and the pier is connected to the base at the bottom of the platform with a steel rod. Under the action of an earthquake, when the bottom of the platform is separated from the top of the base, the combined disc spring provides the pier with self-resetting ability, and at the same time, the friction rubber and the inner wall of the groove of the platform slide and rub to dissipate the seismic energy. The combination of disc springs and the pre-tightening force of the friction rubber of the utility model can be flexibly adjusted according to design requirements, and has the advantages of low economic cost and simple installation process. It is easy to replace after an earthquake, and has broad application prospects in the field of earthquake resistance of railway bridges.

Background Art

With the development of my country's high-speed railways, the proportion of bridges in the high-speed railway network has increased year by year. However, once the bridge project is damaged in an earthquake, it will not only cause the interruption of the transportation network but also bring huge economic losses. Take the 2008 Wenchuan earthquake as an example, 6,140 highway bridges were damaged, and many bridges on the Baoji-Chengdu Railway and Chengkun Railway were also damaged. After the post-earthquake seismic performance assessment, some bridges need to be dismantled and rebuilt, and some bridges need to be reinforced before they can be restored to use, which seriously affects emergency rescue.

The current focus of engineering seismic resistance is to reduce the damage of bridge piers in earthquakes by setting a separation surface at the bottom of the pier, and to achieve the recoverability of bridge piers after earthquakes by configuring self-resetting devices. In highway column bridge piers, a separation surface is often set directly between the bridge pier and the abutment, and prestressed steel bars are added inside the bridge pier to provide self-recovery force. At the same time, energy dissipation rods, energy-absorbing steel bars, anti-buckling restraint supports or shape memory alloys are installed near the lifting surface to improve the energy dissipation capacity of the structure, so as to achieve the purpose of weakening the seismic response of the structure. In railway bridges, setting a platform at the bottom of the pier can effectively improve the lateral stiffness of the bridge pier, but it still requires additional energy dissipation devices to be used in conjunction. At present, common energy dissipation devices are generally built into the platform. If they are damaged in an earthquake, it is not easy to replace or repair them, which affects the continued use of self-resetting bridge piers. Therefore, it is very necessary to develop a new type of railway self-resetting bridge pier with replaceable energy dissipation devices.

Summary of the invention

In view of the above problems, the utility model relates to a new type of railway self-resetting bridge pier with a replaceable energy dissipation device. It is mainly composed of a bridge pier, a platform and a replaceable energy dissipation device. The replaceable energy dissipation device is composed of a combination disc spring, a friction rubber, a movable baffle, a fixed baffle, a steel rod with a thread and a nut. The platform and the bridge pier are cast as a whole, and a separation surface is set between the platform and the foundation. A groove is reserved on the upper surface of the platform, and a fine hole is set at the bottom of the groove to penetrate the platform. The combination disc spring is placed in the groove, and the steel rod with a thread passes through the combination disc spring and the fine hole at the bottom of the groove and is anchored to the foundation. The fixed baffle is placed above the disc spring in the groove, and the friction rubber is strung on the steel rod. The bottom surface of the friction rubber contacts the fixed baffle, and the top surface of the friction rubber contacts the movable baffle. Finally, a nut is added above the movable baffle to provide pre-pressure for the friction rubber, ensuring that the friction rubber fits tightly with the inner wall of the groove. The components cooperate with each other to play a self-resetting energy dissipation role.

In order to achieve the above purpose, the utility model adopts the following technical solutions:

a. According to the requirements of bridge design, the dimensions of the additional platform, friction rubber, combined disc spring, fixed baffle, movable baffle, steel rod with thread and nut and other components are reasonably designed, and the groove required for the installation of the replaceable energy dissipation device is reserved on the additional platform in advance, and a thin hole is set at the bottom of the groove to penetrate the additional platform;

b. Place the combined disc spring in the groove of the platform, pass the steel rod with threads through the combined disc spring and the fine hole of the groove of the platform, anchor it on the platform, and ensure that the fixed baffle is placed above the combined disc spring;

c. Pass the friction rubber with the center hole and the movable baffle through the steel rod in sequence and place them above the fixed baffle.

d. Install bolts above the movable baffle to provide pre-pressure for the friction rubber and ensure that the friction rubber is in close contact with the side wall of the platform groove.

The main advantages of the utility model are:

1. The utility model uses a combination of disc springs, friction rubber and a platform, which is easy to assemble and replace, and is suitable for use in the field of railway bridge earthquake resistance.

2. The disc spring combination mode and the friction rubber preload of the utility model can be flexibly adjusted according to the design of the bridge pier.

3. The combined disc spring in the groove of the utility model provides the bridge pier with self-reset capability, and the friction rubber provides energy dissipation capability. The force is clear and it is easy to replace after an earthquake.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the composition of the railway self-resetting bridge pier.

Figure 2 is a cross-sectional view of a railway self-resetting bridge pier.

Figure 3 is a cross-sectional view of the composition and installation of the railway self-resetting energy-consuming component.

FIG. 4 is a schematic diagram of a railway self-resetting bridge pier with a replaceable energy dissipation device.

DETAILED DESCRIPTION

The present invention will be further described below in conjunction with the accompanying drawings, examples of which are shown in the accompanying drawings and the following description.

As shown in FIG1 , the utility model mainly comprises a pier body (1), a platform (2), a movable baffle (7), a fixed baffle (9), a friction rubber (8), a nut (6), a combined disc spring (10), and a steel rod with a ribbed wire (11). The movable baffle (7), the fixed baffle (9), the friction rubber (8), the nut (6), the combined disc spring (10), and the steel rod with a ribbed wire constitute a replaceable energy dissipation device (4). According to the design parameters of the pier, a hole corresponding to the size of the steel rod (11) is opened at the central position of the movable baffle (7), the fixed baffle (9), and the friction rubber (8). Then, the combined disc spring (10) is installed into the groove (3) prefabricated in advance of the platform, the steel rod (11) with threads is passed through the combined disc spring (10) and inserted into the fine hole of the groove (3) of the platform, and the unthreaded end is anchored on the base (5) (the steel rod can move in the fine hole of the groove of the platform), so that the fixed baffle (9) and the combined disc spring (10) are in close contact. Finally, the friction rubber (8) and the movable baffle (7) are respectively inserted into the threaded steel rod (11) in sequence, and the nut (6) is screwed on the threaded steel rod (11). By applying a pre-tightening force, the friction rubber (8) is compressed and lateral deformed, and is closely fitted with the inner wall of the groove (3) of the platform.

When an earthquake occurs, the bottom of the self-resetting pier pedestal (2) and the top of the pedestal (5) are lifted off, the bottom of the pedestal groove (3) and the fixed baffle (9) move relative to each other, the extruded composite disc spring deforms, and a self-restoring force is generated. At the same time, the friction rubber (8) and the inner wall of the pedestal groove dissipate friction energy, thereby protecting the overall structure of the bridge.

The connection mode of the utility model adopts bolt connection entirely, and the processing and installation are simple, the performance is excellent, and the replacement is convenient. It has a good application prospect in the field of railway bridge earthquake resistance.

Claims (7)

1. The utility model provides a novel take removable power consumption device's railway from pier that resets, by pier shaft (1), add platform (2), adjustable fender (7), friction rubber (8), fixed stop (9), nut (6), combination dish spring (10) and take line silk's steel pole (11) part to constitute, characterized by steel pole (11) one end is opened and is had the line silk, add platform (2) prefabrication and have and add platform recess (3), the recess bottom is provided with the pore, combination dish spring (10) is loaded into and is added in the platform recess, steel pole (11) pass combination dish spring (10) and add platform recess (3) pore, anchor the friction rubber (8) that does not open line silk one end on the cushion cap, then penetrate steel pole (11) with center trompil in proper order, install nut (6) additional in adjustable fender top, and exert the pretightning force, form novel take removable power consumption device's railway from pier.

2. The novel railway self-resetting pier with the replaceable energy consumption device is characterized in that the pier is a railway self-resetting pier with a platform, friction rubber (8) and the inner wall of a groove of the platform are subjected to friction energy consumption, and a combined disc spring (10) generates self-restoring force.

3. The novel railway self-resetting pier with the replaceable energy consumption device according to claim 1, wherein the steel rod (11) with the grain wire can move in the fine holes of the adding platform groove (3), and one end of the steel rod (11) without the grain wire with the grain wire is anchored on the bearing platform.

4. The novel railway self-resetting pier with the replaceable energy consumption device according to claim 1, wherein the combined disc spring (10) is installed in the adding platform groove (3), the steel rod (11) with the grain wires penetrates through the combined disc spring (10), and the bottoms of the fixed baffle (9) and the adding platform groove (3) are respectively attached to the upper end and the lower end of the combined disc spring (10).

5. A new railway self-resetting pier with replaceable energy consumption device according to claim 1, characterized in that the friction rubber (8) is placed on the fixed baffle (9) through the steel bar (11) with the grain wire.

6. A new railway self-resetting pier with replaceable energy consumption device according to claim 1, characterized in that the movable baffle (7) is placed on the friction rubber (8) through the steel bar (11).

7. The novel railway self-resetting pier with the replaceable energy consumption device according to claim 1, wherein the nut (6) is arranged at the thread of the threaded steel rod (11) and is tightly contacted with the movable baffle (7), and the friction rubber (8) is compressively deformed by pretightening force, so that the friction rubber (8) is tightly contacted with the side wall of the platform adding groove (3).