CN111236724A

CN111236724A - Assembled sleeve metal round bar energy dissipation damper

Info

Publication number: CN111236724A
Application number: CN202010067741.7A
Authority: CN
Inventors: 李国强; 钟云龙; 王彦博; 金华建; 孙飞飞
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-06-05
Anticipated expiration: 2040-01-20
Also published as: CN111236724B

Abstract

An assembled sleeve metal round bar energy dissipation damper comprises a metal round bar core rod (1), a metal sleeve (2), two filling guard flaps (4) and a bolt (3); the metal round bar core rod (1) is a round steel bar and comprises an end threaded area (101), an end expanded area (102), a middle energy dissipation area (103) and a middle convex rib (105); the metal sleeve (2) is a circular steel pipe, the inner diameter of the metal sleeve is the same as the expanded area of the end part of the metal round bar core rod (1), the outer diameter of the metal sleeve is determined according to the stability requirement, and a plurality of holes (201) with threads are formed in the middle of the metal sleeve; the bolt (3) is screwed into the threaded hole (201) and tightly props against the outer surface of the filling valve guard (4), so that the relative fixation of the positions of all components is realized; and so on. All parts can be assembled on site, the process is simple, the replacement and the reutilization of components are very facilitated, and the construction cost is saved.

Description

Assembled sleeve metal round bar energy dissipation damper

Technical Field

The invention belongs to the technical field of civil structural engineering, and particularly relates to an assembled sleeve metal round bar energy dissipation damper.

Technical Field

The steel has good plasticity and toughness, can undergo large accumulated plastic deformation under the action of reciprocating load, consumes a large amount of earthquake energy, and is an excellent energy dissipation and shock absorption material for engineering structures; but the steel is easy to have the stability problem when being pressed, which is not beneficial to the exertion of the plastic deformation capacity of the steel, and the metal energy dissipation damper with the buckling prevention measure well avoids the problem, such as buckling restrained brace, buckling restrained steel plate wall and the like; the anti-buckling technology is developed in Japan for the first time, American scholars also start the research in the aspect after northern earthquake in 1994, and at present, a large number of scholars in China develop anti-buckling energy dissipation products; although the variety is various, most of the types are concentrated on buckling restrained braces and buckling restrained steel plate shear walls; from the view of functions and using methods, the two products are approximately consistent, and both establish a new lateral force resisting system for engineering knots; when the high-strength steel-plate-type steel plate is applied to an engineering structure, the normal use function of a building can be influenced to a certain extent, the structural rigidity can be increased, the seismic action and the acceleration reaction of the structure are improved, and the application of the high-strength steel-plate-type steel plate in the engineering structure with precise instruments is limited. The dampers which are small in size and mainly arranged in the node area are paid more and more extensive attention, the dampers can not obviously improve the structural rigidity, can also dissipate energy and reduce shock, increase the rotation capacity of the nodes, effectively avoid the local buckling of structural members and are convenient to replace after the shock.

Disclosure of Invention

The invention aims to provide a metal energy dissipation damper which is simple in structure and can be used for engineering structures, so as to solve the application problems of large dampers in the technical background and expand the types of small dampers.

Therefore, the invention provides an assembled sleeve metal round bar energy dissipation damper which can be widely arranged in a node connecting area of a structure, increases the rotation capacity and energy consumption capacity of a node, effectively prevents a structural member body from entering a yield stage or generating a local buckling problem, reduces earthquake loss, and has the advantages of low manufacturing cost, flexible arrangement, good earthquake resistance and convenience in replacement after earthquake.

In order to achieve the purpose, the technical scheme provided by the invention has the structural design characteristics that: the assembled sleeve metal round bar energy dissipation damper comprises a metal round bar core rod (1), a metal sleeve (2), two filling guard flaps (4) and a bolt (3);

the metal round bar core rod (1) is a round steel bar and comprises an end threaded area (101), an end expanded area (102), a middle energy dissipation area (103) and a middle convex rib (105);

the metal sleeve (2) is a circular steel pipe, the inner diameter of the metal sleeve is the same as the expanded area of the end part of the metal round bar core rod (1), the outer diameter of the metal sleeve is determined according to the stability requirement, and a plurality of holes (201) with threads are formed in the middle of the metal sleeve;

the bolt (3) is screwed into the threaded hole (201) and tightly props against the outer surface of the filling valve guard (4), so that the relative fixation of the positions of all components is realized;

the filling guard flap (4) is an arc-shaped steel plate, the radius of the inner surface of the filling guard flap is slightly larger than the outer diameter of the middle energy dissipation area (103) of the metal round bar core rod (1), the central angle of the filling guard flap is slightly smaller than 180 degrees, and a groove (401) is dug in the middle of the filling guard flap.

Preferably, the metal round bar core rod (1) is made of steel with low yield point.

The invention is suitable for various connecting nodes in a steel structure system, in particular to semi-rigid connection column base nodes.

The design principle is as follows:

the metal round bar core rod (1) is made of low-yield-point steel and cut into a shape with a middle energy dissipation area (103) and convex ribs (105), the middle energy dissipation area (103) can be firstly yielded under the action of force, and the metal round bar core rod (1) is restrained by an external metal sleeve (2) so as to prevent the possible instability problem when the metal round bar core rod (1) is pressed; the filling guard flap (4) fills the space between the middle energy dissipation area (103) and the metal sleeve (2) and restricts the lateral deformation of the metal round bar core rod (1).

The invention has the following beneficial effects: the metal damper furthest exerts the plastic deformation capacity of a metal material, can effectively dissipate seismic energy, reduces the response and damage of a structure, has the advantages of simple structure and low cost, can be assembled and disassembled on site, is simple to construct and is convenient to replace after an earthquake. All parts of the invention can be assembled on site, the process is simple, the invention is very beneficial to the replacement and the reutilization of the components, and the construction cost is saved.

Drawings

FIG. 1 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 2 is a top view of an embodiment of the fabricated sleeve metal round bar energy dissipation damper;

FIG. 3 is a cross-sectional view at B-B of FIG. 2;

FIG. 4 is a front view of a metal round bar core bar;

FIG. 5 is a perspective view of a filling flap;

FIG. 6 is a front view and a top view of a metal sleeve; fig. 7 is the appearance structure of the assembled sleeve metal round bar energy dissipation damper of the invention.

In the figure: 1. a metal round bar core bar; 101. an end threaded region; 102. an end enlargement area; 103. a middle energy dissipation zone; 104. a circular arc transition zone; 105. a rib; 2. a metal sleeve; 201. a threaded hole; 3. a bolt; 4. filling the protective valve; 401. and (4) a groove.

Detailed Description

The technical solution of the present invention is further explained below with reference to the following embodiments and the accompanying drawings.

In this embodiment, as shown in fig. 1, the fabricated metal energy dissipation damper includes a metal round bar core rod (1), a metal sleeve (2), two filling guard flaps (4), and a bolt (3);

as shown in figure 4, the metal round bar core rod is made of steel with low yield point and comprises an end thread area (101), an end expanding area (102), a middle energy dissipation area (103), an arc transition area (104) and convex ribs (105),

the middle energy dissipation section (103) is an area with the smallest section in the metal round bar core rod, and the energy dissipation section (103) is a predicted plastic development position of the assembled casing metal round bar energy dissipation damper.

As shown in fig. 5, the filling guard flap (4) is a circular arc steel plate with a square groove (401) in the middle; the convex ribs (105) and the concave grooves (401) on the metal round bar core rod can be mutually meshed so as to fix the position of the filling protective petals (4) relative to the metal round bar core rod (1). Namely, the two metal guard flaps are provided with grooves, the metal guard flaps wrap the middle energy dissipation area of the metal round bar core rod, and the peripheral dimension of the metal guard flaps is consistent with the end part expansion area of the metal round bar core rod.

As shown in figure 6, the metal sleeve (2) is a circular steel tube, the inner diameter of the circular steel tube is the same as the expanded area of the end part of the metal round bar core rod (1), the outer diameter is determined according to the stability requirement, and a plurality of threaded holes (201) are formed in the middle of the circular steel tube. That is, the metal sleeve is a circular steel tube, the inner diameter of the metal sleeve is close to the expanded area of the end part of the metal round bar core rod, only allowance of matching tolerance is reserved, a plurality of internal thread holes are formed in the middle of the metal sleeve, and a screw is screwed into the internal thread holes to tightly push the metal guard flap inside the metal sleeve so as to realize relative fixation of the metal round bar core rod, the metal guard flap and the metal sleeve.

The construction method comprises the following steps:

step one, producing parts in a factory:

manufacturing a metal round bar core rod: in the embodiment, the metal round bar core rod (1) is preferably made of low-yield-point steel, a round steel bar is selected as a blank, and then the blank is cut by a lathe, and the metal round bar core rod cannot be welded.

Manufacturing a filling protective valve: in the embodiment, the feasible manufacturing scheme of the filling protective flap is that a flat steel plate is cut into a groove and then is cold-processed into an arc shape; in the embodiment, the filling guard flap is made of steel, but any other form of material replacement is within the protection scope of the patent;

manufacturing a metal sleeve: adopting a metal steel pipe as a blank, and forming and tapping holes in the middle;

step two, assembling a product:

wrapping the two metal protective flaps (4) with the cylindrical metal round bar core rod (1), and paying attention to the matching of the convex ribs (105) in the grooves (401); then the matching body is penetrated into the metal sleeve (2) to ensure that the centers of the convex rib (105), the groove (401) and the threaded hole (201) are approximately positioned in the same plane; and finally, screwing the bolt (3) into the threaded hole (201) and tightly pushing the outer surface of the filling guard flap (401), so that the relative positions of the metal round rod core rod (1), the filling guard flap (4) and the metal sleeve (2) are completely fixed, and the assembly of the assembled sleeve metal round rod energy dissipation damper is completed.

Claims

1. An assembled sleeve metal rod energy dissipation damper, characterized in that, this damper includes: the device comprises a metal round bar core bar (1), a metal sleeve (2), two filling guard flaps (4) and a bolt (3);