CN109356023B

CN109356023B - Damping anti-falling beam support

Info

Publication number: CN109356023B
Application number: CN201811321921.2A
Authority: CN
Inventors: 刘猛; 亓路宽
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2018-11-08
Filing date: 2018-11-08
Publication date: 2021-01-15
Anticipated expiration: 2038-11-08
Also published as: CN109356023A

Abstract

The invention discloses a shock-absorbing anti-falling beam support which is used for supporting a beam body, wherein a beam body preformed hole is formed in the bottom of the beam body, the shock-absorbing anti-falling beam support comprises a support main body and a bottom plate with bolt holes, the support main body is formed by overlapping a rubber layer and a steel plate, a steel bar is coaxially arranged in the center of the support main body, the bottom of the steel bar and the bottom plate are integrally formed, and a certain gap is reserved between the steel bar and the support main body and used for filling an elastic part. According to the invention, the steel bar is inserted into the beam body preformed hole, so that the support body plays a role in supporting and preventing the beam body from falling, and the elastic piece arranged between the steel bar and the support body provides a damping effect, so that the normal use requirement under the non-earthquake action can be met, and the damping and damage prevention requirements under the earthquake can be met.

Description

Damping anti-falling beam support

Technical Field

The invention belongs to the technical field of bridges, and particularly relates to a damping and anti-falling beam support.

Background

The falling of the beam of the upper structure of the bridge is the primary reason of the collapse of the bridge, people pay more and more attention to the problem of preventing the falling of the beam, more and more bridge seismic damages enable more and more experts and scholars at home and abroad to be put into the research on the aspect, a plurality of achievements are obtained, and the falling of the beam is applied to actual engineering. However, there are many problems in designing a stopper device, designing and putting into practical use a coupling device, and researching and developing a damper device.

At present, the design and the construction of preventing the roof beam device that falls among the actual engineering are comparatively loaded down with trivial details, and traditional design for example needs to set up the dog and prevents transversely falling the roof beam, sets up the cable and prevents vertically falling the roof beam, because of lacking whole concerted action, so prevent falling the roof beam effect very not obvious.

In the earthquake process, the existing beam falling prevention device plays a certain role, but the device is seriously damaged, and the beam body collides to seriously damage the support and the lower structure. The main reason is that part of the beam falling prevention device does not have the damping effect, and part of the beam falling prevention device with the energy consumption function is unstable in performance and has an unobvious damping effect.

Disclosure of Invention

Aiming at the technical problem of unstable structure of the anti-falling beam in the prior art, the invention provides the shock-absorbing anti-falling beam support which plays a role of shock absorption and anti-falling beam and simultaneously ensures that a support main body is not greatly damaged.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a roof beam support is prevented falling in shock attenuation, includes support main part and the bottom plate of taking the bolt hole, support main part is formed by rubber layer and steel sheet stack, support main part's center is provided with the rod iron with the axle center, the bottom and the bottom plate integrated into one piece of rod iron, just leave certain space between rod iron and the support main part for fill the elastic component.

Preferably, the elastic member is an airbag.

Preferably, the height of the steel bar is higher than that of the support main body, and the steel bar is used for extending into the beam body preformed hole at the upper part so as to prevent the beam from falling.

Preferably, the steel bar comprises an upper bar body and a lower bar body, the upper bar body extends into the reserved hole of the beam body, and the upper bar body is in threaded connection with the lower bar body.

Preferably, a steel protective cylinder is sleeved outside the upper steel bar and located in the reserved hole of the beam body, and a rubber damping ring is sleeved in the steel protective cylinder.

The shock-absorbing and anti-falling beam support has the following beneficial effects: according to the invention, the steel bar is inserted into the beam body preformed hole, so that the support body plays a role in supporting and preventing the beam body from falling, and the elastic piece arranged between the steel bar and the support body provides a damping effect, so that the normal use requirement under the non-earthquake action can be met, and the damping and damage prevention requirements under the earthquake can be met.

Drawings

FIG. 1 is a schematic cross-sectional view of a shock-absorbing anti-drop beam support in the present invention;

FIG. 2 is a schematic top view of a shock-absorbing anti-drop beam support according to a first embodiment of the present invention;

FIG. 3 is a schematic top view of a second embodiment of the shock-absorbing anti-drop beam support of the present invention;

FIG. 4 is a schematic view of an installation structure of the shock-absorbing anti-drop beam support in the present invention;

FIG. 5 is a schematic cross-sectional view of a steel sleeve of the shock-absorbing anti-drop beam support in the present invention;

FIG. 6 is a schematic cross-sectional view of a steel bar of the shock-absorbing anti-drop beam support in the present invention;

FIG. 7 is a schematic structural view of the shock-absorbing anti-falling beam support in the normal use condition;

fig. 8 is a schematic structural view of the shock-absorbing anti-falling beam support in the invention under the action of earthquake.

In the figure: 1. a base plate; 11. bolt holes; 2. a support body; 21. a steel plate; 22. a rubber layer; 3. a steel bar; 31. an upper rod; 32. a lower rod body; 4. an air bag; 5. a steel casing; 6. a rubber shock-absorbing ring; 7. a beam body.

Detailed Description

So that those skilled in the art can better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1, 2, and 4 to 8, an embodiment of the present invention discloses a shock-absorbing anti-falling beam support, which has anti-falling beam and shock-absorbing functions, and is used for supporting a beam 7, wherein a beam preformed hole is formed at the bottom of the beam 7, the shock-absorbing anti-falling beam support includes a support main body 2 and a bottom plate 1 with bolt holes, a conventional support main body 2 is arranged above the bottom plate 1, the support main body 2 is formed by overlapping a rubber layer 22 and a steel plate 21, the support main body 2 is rectangular in a top view, a central circular hole is formed in the center of the support main body 2 and is used for inserting a steel rod 3, the bottom of the steel rod 3 and the bottom plate 1 are integrally formed, a certain gap is left between the steel rod 3 and the support main body 2 and is used for filling an elastic member, the elastic member may be an airbag 4, and the airbag 4 generates a large elastic deformation and can play roles of.

The height of the steel bar 3 is higher than that of the support main body 2, and the steel bar is used for extending into a beam body preformed hole of the upper beam body 7 to prevent the beam from falling.

Considering the problem of replacing the support, the steel bar 3 is divided into two parts, as shown in fig. 6, the steel bar 3 comprises an upper bar body 31 and a lower bar body 32, the upper bar body 31 extends into the beam body preformed hole of the beam body 7, the lower bar body 32 is positioned in the support main body 2, and the upper bar body 31 is in threaded connection with the lower bar body 32. When the support is disassembled, the beam body 7 is lifted, and the support can be replaced by breaking the screw thread.

The upper part of the steel bar 3 is provided with a steel casing 5, as shown in fig. 4 and 5, the outside of the upper bar body 31 is sleeved with the steel casing 5, the steel casing 5 is positioned in a beam body preformed hole of the beam body 7, and the steel casing 5 is internally sleeved with a rubber damping ring 6. When an earthquake occurs, the steel casing 5 and the rubber vibration damping ring 6 act together with the support main body 2 and the air bag 4 to increase structural damping, so that the hysteresis curve of the support is fuller, and the shock absorption effect is achieved.

Example two

As shown in fig. 3, it is different from the first embodiment in that the shape of the holder main body 2 in plan view is circular.

The working state of the shock-absorbing anti-falling beam support under the normal use condition and the earthquake action is shown in fig. 7 and 8, the upper structure is supported by a support main body 2 formed by overlapping a steel plate 21 and rubber 22, a certain gap is reserved between a steel rod 3 and the support main body 2, the size of the gap is determined according to the maximum shearing displacement of the support main body 2, an upper rod body 31 needs to extend into a beam body reserved hole, the size of the beam body reserved hole is determined according to the maximum shearing displacement of the support main body 2, and the beam body reserved hole and the central circular hole of the support main body have the same aperture. The size in aperture will be in reasonable within range, will satisfy support main part 2 shear deformation under the normal use situation, will guarantee simultaneously that seismic action lower support does not take place to cut and destroy, and the contact of rod iron upper portion and roof beam body preformed hole inner wall plays limiting displacement before the support is cut and is destroyed promptly. The steel casing 5 is arranged in the preformed hole of the beam body, the upper rod body 31 is in contact with the rubber damping ring 6, and the rubber damping ring 6 is extruded to a certain degree to limit the displacement of the beam body 7, so that the beam falling prevention effect is achieved. The space between the support main body 2 and the steel bar 3 is filled with the air bag 4, and under the action of an earthquake, the air bag 4 generates great elastic deformation, plays a role in shock absorption and increases the durability of the support. The inboard of steel casing 5 is provided with rubber shock ring 6, comes temporary combined action with support main part 2 and gasbag 4 in the earthquake, increases structural damping, makes the support hysteresis curve fuller, plays the cushioning effect.

The invention combines the support and the limiting element together, so that the support has the functions of preventing the beam from falling and damping under the condition of meeting the normal use condition. The shock-absorbing anti-falling beam support disclosed by the invention is simple in structural form and clear in stress, integrates the functions of the support and the anti-falling beam, and solves the problem that the anti-falling beam device in actual engineering is complicated in design and construction.

The shock-absorbing anti-falling beam support mainly has the function of preventing falling beams, can reduce the flow of design and construction without arranging an anti-falling beam device, has a certain shock-absorbing function, reasonably controls the gap between a pin bolt and a support main body, and can play a role in protecting the support when an earthquake comes. The support has the advantages of simple structure, clear principle, good durability and wide application.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A shock-absorbing anti-falling beam support is used for supporting a beam body, a beam body preformed hole is formed in the bottom of the beam body, the shock-absorbing anti-falling beam support comprises a support main body and a bottom plate with bolt holes, the support main body is formed by overlapping a rubber layer and a steel plate, and the shock-absorbing anti-falling beam support is characterized in that a central round hole is formed in the center of the support main body and used for inserting a steel bar, the bottom of the steel bar and the bottom plate are integrally formed, and a certain gap is reserved between the steel bar and the support main body and used for filling an elastic piece;

the steel bar comprises an upper bar body and a lower bar body, the upper bar body extends into the reserved hole of the beam body, and the upper bar body is in threaded connection with the lower bar body.

2. The shock absorbing drop proof beam mount of claim 1, wherein said resilient member is an air bladder.

3. The support of claim 1, wherein the steel bar has a height higher than that of the support body and is used for extending into the reserved hole of the upper beam body to prevent the beam from falling.

4. The shock-absorbing and anti-falling beam support seat as claimed in claim 1, wherein a steel casing is sleeved outside the upper rod body and located in a beam body preformed hole, and a rubber shock-absorbing ring is sleeved in the steel casing.

5. The shock-absorbing and drop-preventing beam support as claimed in claim 1, wherein the diameter of the central circular hole of the support main body is the same as that of the reserved hole of the beam body.