CN108086509A - Built-in double rank surrender dampers - Google Patents

Abstract

The present invention provides a kind of built-in double rank surrender dampers, is related to construction engineering technical field.Built-in double ranks surrender damper using box section steel beam section as mainly structure is formed, and are mountable in beam, are not take up building using space, it is beautiful not influence building；Box section steel beam section has amphisternous construction simultaneously, makes the damper of the present invention have larger bearing capacity；Steel plate is strengthened by plug welding, makes agent structure that there is higher rotational stiffness, the rigidity of junction is improved in the elastic working stage；And the damper consumes energy by using two kinds of energy consumption modules, to realize double rank surrenders, can meet energy consumption demand different under two kinds of deformations, have very big practical value.

Description

Built-in two-stage yield damper

technical field

The invention relates to the technical field of construction engineering, in particular to a built-in double-stage yield damper.

Background technique

In recent years, with the frequent occurrence of earthquakes around the world, and in order to meet the ever-increasing development needs of engineering structures, the passive control theory of structural shock absorption has been widely used, which breaks through the traditional way of consuming seismic energy by relying on the ductility of the structure itself. The anti-seismic method mainly relies on the external energy dissipation device to consume the seismic energy and reduce or even eliminate the damage of the main structure.

Both the friction damper and the lead shear damper are energy-dissipating devices attached to the structure. The friction damper uses the sliding friction to do work, and plays the role of energy dissipation and shock absorption for the structure; the lead shear damper utilizes the Produce plastic deformation to achieve the purpose of energy dissipation and shock absorption.

At present, the research and development of rotational dampers applied to beam-to-column and beam-to-beam connections mainly include: friction dampers, metal dampers, composite dampers, and some rotational energy-dissipating nodes. However, at present, the following disadvantages generally exist for this type of energy-dissipating damper: the rotational stiffness is small and the bearing capacity is low; it takes up the space used by the building and affects the appearance of the building; it is difficult to achieve double-order yielding for the damper with a single energy-dissipating shock-absorbing mechanism , to meet the energy consumption requirements under different deformations.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a built-in double-stage yield damper which has relatively large rotational stiffness, large bearing capacity, does not occupy building space, and has good energy dissipation and shock absorption performance.

In order to achieve the above object, the present invention provides the following technical solutions:

A built-in double-stage yield damper is characterized in that it includes an upper flange of a box-shaped steel beam section, a lower flange of a box-shaped steel beam section, two webs of a box-shaped steel beam section, a reinforcing steel plate, and four pieces of steel Cover plate, cut lead block;

The upper flange of the box-shaped steel beam section and the lower flange of the box-shaped steel beam section are arranged in parallel up and down; the two webs of the box-shaped steel beam section are vertically connected to the upper flange of the box-shaped steel beam section and the box-shaped steel beam section between the lower flanges, and between the two box-shaped steel girder webs; Consists of box-shaped steel girder sections;

The upper flange of the box-shaped steel beam section remains continuous within the scope of the beam section, and the lower flange of the box-shaped steel beam section and the two webs of the box-shaped steel beam section are disconnected at a certain section of the steel beam section and form a distance Notch; the notch formed at the lower flange of the box-shaped steel beam section is the lower flange notch, and the notch formed at the web of the box-shaped steel girder section is the web notch;

Corresponding to the position of the web gap, a reinforced steel plate is provided on the lower surface of the upper flange of the box-shaped steel beam section; the reinforced steel plate is located between the front and rear two box-shaped steel beam section webs, and is attached to the box-shaped steel beam The lower surface of the upper flange of the segment is connected to the upper flange of the box-shaped steel beam segment by plug welding;

Across the lower part of the web gap, a steel cover plate is attached to the front and rear sides of the box-shaped steel beam section web, and the steel cover plate is connected to the box-shaped steel beam section web The plates are fixedly connected, and the steel cover plate is slidingly connected with the web of the box-shaped steel beam section through friction-type high-strength bolts on the other side of the web gap; and all the steel cover plates span the disconnected box-shaped steel beam section web Continuous over a long range.

The lower flange gap and the web gap are bounded, the fixed connection side of the built-in double-stage yield damper is the fixed side, the sliding connection side is the sliding side, and the bearing capacity of the fixed side is greater than that of the sliding side;

The sliding side is provided with a rotational friction energy dissipation module and a lead block shear energy dissipation module; in the rotational friction energy dissipation module, the steel cover plate is slidingly connected to the web of the box-shaped steel beam section; the lead In the block shear energy dissipation module, there are lead block installation holes in the web plates of the two box-shaped steel beam sections, and steel cover plates are provided with lead block installation holes at positions corresponding to the lead block installation holes. The lead block installation groove, the lead block installation hole and the position of the lead block installation groove are embedded with shear lead blocks.

Furthermore, in the rotational friction energy dissipation module on the sliding side, two box-shaped steel beam section webs are provided with oblique oblong bolt holes suitable for the rotation of the built-in double-stage yield damper, and the steel cover plate is A bolt hole is opened at a position corresponding to the oblique oblong bolt hole of the web of the box-shaped steel beam section, and the two webs of the box-shaped steel beam section and the steel cover plate are slidingly connected by friction-type high-strength bolts.

Preferably, the steel cover plate on the fixed side is connected to the web of the box-shaped steel beam section by friction-type high-strength bolts; or the steel cover plate on the fixed side is connected to the web plate of the box-shaped steel beam section by welding.

Preferably, a friction sheet can be added between the sliding side steel cover plate and the web of the box-shaped steel beam section, or the friction coefficient or resistance Abrasive.

As mentioned above, the built-in double-stage yield damper of the present invention combines the friction damper and the lead shear damper, the energy dissipation and vibration reduction mechanisms of the damper. Compared with the prior art, it has the following benefits Effect:

(1) The built-in double-stage yield damper composed of box-section steel beam section, reinforced steel plate, steel cover plate and shear lead block is adopted. Most of the energy-consuming structures are hidden in the box-section steel beam section, and The damper can be installed in the beam, does not occupy building space, and does not affect the beauty of the building.

(2) The built-in double-stage yield damper of the present invention adopts a double web structure, which has a relatively large bearing capacity; and adopts the form of a reinforcing plate plug-welded on the upper flange, so that the damper has a relatively large rotational stiffness .

(3) The energy consumption of the built-in double-stage yield damper of the present invention is mainly divided into two parts, one part relies on the sliding friction energy between the steel beam section web and the steel cover plate, and the other part utilizes the lead after being sheared. Produce plastic hysteretic deformation energy consumption; when the deformation is small, only the rotational friction energy consumption module can be used for energy consumption; The built-in damper can meet different energy consumption requirements under two deformations by setting a double-stage yield.

Description of drawings

Fig. 1 is the schematic front view of the built-in double-stage yield damper of the present invention;

Fig. 2 is the sectional view of A-A section among Fig. 1;

Fig. 3 is the schematic diagram of the front view of the box-shaped steel girder section of the present invention;

Fig. 4 is the structural representation of steel cover plate of the present invention;

Fig. 5 is a sectional view of section B-B in Fig. 4 .

Explanation of reference signs

1 Upper flange of box steel beam section

2 Lower flange of box steel beam section

2a Lower flange notch

3 Web of box steel girder section

3a Bolt holes

3b Oblique oblong bolt holes

3c Lead block mounting holes

3d web notch

4 reinforced steel plate

5 steel cover

5a Lead block mounting groove

5b Bolt holes

6 cut lead

7 Friction type high-strength bolts

8 Center of rotation

9 friction surface

Detailed ways

The technical solution of the built-in double-stage yield damper provided by the present invention will be further described below in conjunction with specific embodiments and accompanying drawings. The advantages and features of the present invention will become clearer in conjunction with the following description.

It should be noted that the embodiments of the present invention have better implementability and are not intended to limit the present invention in any form. The technical features or combinations of technical features described in the embodiments of the present invention should not be regarded as isolated, and they can be combined with each other to achieve better technical effects. The scope of the preferred embodiment of the present invention may also include other implementations, and this should be understood by those skilled in the art to which the embodiments of the present invention pertain.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values.

The drawings of the present invention are all in a very simplified form and use inaccurate proportions, and are only used for the purpose of conveniently and clearly assisting in illustrating the embodiments of the present invention, and are not intended to limit the conditions for the implementation of the present invention. Any structural modification, change in proportion or size adjustment shall fall within the scope covered by the technical content disclosed in the present invention without affecting the effect and purpose of the present invention. And the same reference numerals appearing in the drawings of the present invention represent the same features or components, and can be applied in different embodiments.

The structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification for the understanding and reading of those who are familiar with this technology, and are not used to limit the conditions for the implementation of the present invention , so it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of the disclosure of the present invention without affecting the functions and objectives of the present invention. within the range covered by the technical content. At the same time, terms such as "upper", "lower", "left", "right" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the practicable aspects of the present invention. The change or adjustment of the relative relationship within the scope, without any substantial change in the technical content, shall also be regarded as the applicable scope of the present invention.

Example

As shown in Figures 1 to 5, the present invention provides a built-in double-stage yield damper.

As shown in Figures 1 and 2, the built-in double-stage yield damper includes the upper flange 1 of the box-shaped steel beam section, the lower flange 2 of the box-shaped steel beam section, two webs 3 of the box-shaped steel beam section, Four steel cover plates 5, shear lead weights 6, and several friction-type high-strength bolts 7. Among them, the upper flange 1 of the box-shaped steel beam section and the lower flange 2 of the box-shaped steel beam section are arranged parallel to each other; two webs 3 of the box-shaped steel beam section are vertically connected to the upper flange 1 of the box-shaped steel beam section and the box Between the lower flanges 2 of the steel girder section, and between the webs 3 of the two box steel beam sections, they are set in parallel; the upper flange 1 of the box steel beam section, the lower flange 2 of the box steel beam section and two The webs 3 of the box-shaped steel girder section together constitute the box-shaped steel girder section.

As shown in Figures 1 and 3, the upper flange 1 of the box-shaped steel girder section remains continuous within the scope of the beam section, and the lower flange 2 of the box-shaped steel girder section and the two webs 3 of the box-shaped steel girder section The section is broken and a gap is formed for a certain distance; among them, the gap formed at the lower flange 2 of the box-shaped steel beam section is the lower flange gap 2a, and the gap formed at the web 3 of the box-shaped steel beam section is the web The notch 3d, the notch 2a of the lower flange and the notch 3d of the web can ensure that the built-in double-stage yield damper can rotate under moderate earthquakes, and there is enough room for rotation.

As shown in Figures 1 and 2, corresponding to the position of the web notch 3d formed by the web 3 of the box-shaped steel beam section, a reinforcing steel plate 4 is provided on the lower surface of the upper flange 1 of the box-shaped steel beam section. Between the front and rear two box-shaped steel beam section webs 3, and stick to the lower surface of the box-shaped steel beam section upper flange 1, and connect with the box-shaped steel beam section upper flange 1 by plug welding.

Further, across the lower part of the web notch 3d, a steel cover plate 5 is attached to the front and rear sides of the box-shaped steel beam section web 3, and the steel cover plate 5 is passed through friction-type high-strength bolts on one side of the web notch 3d 7 is fixedly connected with the web 3 of the box-shaped steel beam section, and the steel cover plate 5 is slidingly connected with the web 3 of the box-shaped steel beam section through friction-type high-strength bolts 7 on the other side of the web gap 3d; at the same time, all steel covers The slab 5 spans the web 3 of the disconnected box steel girder section and remains continuous throughout its entire length.

As shown in Figure 1, the lower flange notch 2a and the web notch 3d are bounded, the fixed connection side of the built-in double-stage yield damper is the fixed side, and the sliding connection side is the sliding side; wherein, the sliding side There are rotating friction energy dissipation modules and lead block shear energy dissipation modules, the bearing capacity of the fixed side is greater than that of the sliding side; the connection between the steel cover plate 5 on the fixed side and the web plate 3 of the box-shaped steel beam section, except In addition to using friction-type high-strength bolts 7 to connect, welding can also be used.

As shown in Figures 1 and 3, there are bolt holes 3a in the webs 3 of the two box-shaped steel beam sections on the fixed side; There are oblique oblong bolt holes 3b adapted to the rotation of the built-in double-stage yield damper; Open bolt hole 5b to oblong bolt hole 3b place. In the present invention, the number and position of oblique oblong bolt holes are mainly determined according to the load-bearing capacity requirement of the damper.

As shown in Figures 3 and 5, in the lead block shear energy dissipation module on the sliding side, the webs 3 of the two box-shaped steel beam sections are provided with lead block installation holes 3c, and at the corresponding position of the steel cover plate 5 There are lead block installation grooves 5a of the same shape and size, and a whole piece of cut lead block 6 is embedded at the position of the lead block installation hole 3c and the lead block installation groove 5a.

The rotational friction energy dissipation module of the built-in double-stage yield damper of the present invention has four friction surfaces 9, the lower flange 2a, the web notch 3d and the oblong bolt hole 3b provide the steel cover plate 5 and the box-shaped steel beam The space where the section web 3 relatively slides, the part where the steel cover plate 5 and the box-shaped steel beam section web 3 are attached is the main structural part of the frictional energy consumption of the damper; the rotation center 8 is the position of the corresponding gap of the upper flange . Under the earthquake, the slip side rotates around the rotation center 8, and the box-shaped steel beam segment web 3 and the steel cover plate 5 pass through the sliding friction between them to achieve the effect of energy dissipation and shock absorption.

In order to improve the friction coefficient or wear resistance of the friction surface, a friction plate can be added between the friction surface formed by the steel cover plate 5 on the sliding side and the web plate 3 of the box-shaped steel beam section, or a wear-resistant plate, or an anti-friction plate can be used The surface is treated mechanically and chemically.

The lead block shear energy dissipation module of the built-in double-stage yield damper of the present invention has two shear lead blocks, the lead block installation hole 3c, the lead block installation groove 5a and the shear lead block 6 constitute The main structural part of the damper lead shear energy consumption; under the action of an earthquake, the shear lead block 6 is sheared by the translational steel cover plate 5, resulting in plastic hysteretic deformation, thereby further improving the damper energy consumption and shock absorption Ability. When the earthquake only causes a small deformation of the structure, only the rotating friction energy dissipation module can be used to dissipate energy. When the deformation is large, the energy consumption demand is greater than that of the small deformation, and two kinds of energy dissipation modules can be used at the same time. can. Therefore, the built-in damper meets the different energy consumption requirements under the two deformations by setting a double-stage yield.

The built-in double-stage yield damper of the present invention uses a box-section steel beam section as the main structure, which can be installed in the beam, does not occupy the building space, and does not affect the appearance of the building; at the same time, the box-section steel beam section has double The structure of the web makes the damper of the present invention have a greater bearing capacity; the steel plate is strengthened by plug welding, so that the main structure has a higher rotational stiffness, and the rigidity of the joint is improved in the elastic working stage; and the damper passes through Two kinds of energy dissipation modules are used to dissipate energy to achieve double-stage yielding, which can meet different energy consumption requirements under two deformations, and has great practical value.

The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (3)

1. a kind of built-in double rank surrender dampers, it is characterised in that：Including box steel beam section top flange (1), box steel beam section Lower flange (2), two pieces of box steel beam section webs (3) strengthen steel plate (4), four pieces of steel deck-plates (5), shearing lead (6)；

The box steel beam section top flange (1) is arranged in parallel up and down with box steel beam section lower flange (2)；Two pieces of box steel beam section abdomens Plate (3), which is respectively perpendicular, to be connected between box steel beam section top flange (1) and box steel beam section lower flange (2), and two blocks of box-shaped steel It is front and rear between beam section web (3) to be arranged in parallel；Box steel beam section top flange (1), box steel beam section lower flange (2) and two pieces of box-shapeds Girder steel section web (3) collectively forms box steel beam section；

The box steel beam section top flange (1) keeps continuously in the range of beam section, box steel beam section lower flange (2) and two pieces of box-shapeds Girder steel section web (3) disconnects at girder steel section section and forms the notch of a distance；At box steel beam section lower flange (2) The notch of formation is lower flange notch (2a), and the notch formed at box steel beam section web (3) is web notch (3d)；

Corresponding to the position of web notch (3d), it is provided in the lower surface of box steel beam section top flange 1 and strengthens steel plate (4)；Institute It states and strengthens steel plate (4) between front and rear two pieces of box steel beam sections web (3), and be affixed under box steel beam section top flange (1) Surface is connected by plug welding with box steel beam section top flange (1)；

Across the lower part of the web notch (3d), one piece is respectively fitted in the front and rear sides of the box steel beam section web (3) Steel deck-plate (5), steel deck-plate (5) are fixedly connected in the one side of web notch (3d) with box steel beam section web (3), steel deck-plate (5) It is slidably connected in the opposite side of web notch (3d) by frictional high-strength bolts (7) and box steel beam section web (3)；It is and all Steel deck-plate (5) keep continuous in length range across the steel beam with box shape section web (3) of disconnection.

With lower flange notch (2a) and web notch (3d) for boundary, the side that is fixedly connected of built-in double rank surrender dampers is Affixed side, sliding side is in the side that is slidably connected, and the bearing capacity of affixed side is more than the bearing capacity for sliding side；

Pivoting friction energy consumption module and lead shear energy dissipation module are equipped in the sliding side；The pivoting friction energy consumption module In, it is slidably connected between steel deck-plate (5) and box steel beam section web (3)；In the lead shear energy dissipation module, two blocks of box-shaped steel Lead mounting hole (3c) is offered in beam section web (3), steel deck-plate (5) is in the position corresponding to lead mounting hole (3c) Offer the lead installation groove (5a) to match with the lead mounting hole (3c), lead mounting hole (3c) and lead installation groove Shearing lead (6) is embedded at (5a) position.

2. built-in double rank surrender dampers according to claim 1, it is characterised in that：The pivoting friction of the sliding side In the module that consumes energy, two pieces of box steel beam section webs (3), which offer, is adapted to the oblique of built-in double rank surrender dampers rotations To oval bolt hole (3b), steel deck-plate (5) is in the position of the oblique oval bolt hole (3b) corresponding to box steel beam section web (3) Place offers bolt hole (5b), passes through frictional high-strength bolts between two pieces of box steel beam sections web (3) and steel deck-plate (5) (7) it is slidably connected.

3. built-in double rank surrender dampers according to claim 1, it is characterised in that：The steel deck-plate of the affixed side (5) it is connected with box steel beam section web (3) using frictional high-strength bolts (7)；Or

The steel deck-plate (5) of the affixed side is used with box steel beam section web (3) and is welded to connect.