WO2017054323A1

WO2017054323A1 - All-steel dual-plate self-centring buckling-restrained brace device and method

Info

Publication number: WO2017054323A1
Application number: PCT/CN2015/097295
Authority: WO
Inventors: 夏军武; 谢伟; 柏建彪; 常鸿飞
Original assignee: 中国矿业大学
Priority date: 2015-09-28
Filing date: 2015-12-14
Publication date: 2017-04-06
Also published as: CN105256911B; CA2948274A1; RU2665737C1; CN105256911A; AU2015394927B1; CA2948274C

Abstract

Disclosed is an all-steel dual-plate self-centring buckling-restrained brace, comprising two energy dissipation core plates (1), a peripheral frame constraint component (2), two force transfer steel plates (3), two end plates (6), a stiffening plate (4), a rubber plate (7) and a plurality of centring ribs (5). The production method of the buckling-restrained brace is to assemble the above-mentioned components by means of welding and riveting. The buckling-restrained brace component can realize self-centring, residual deformation of the structure after earthquake can be effectively reduced, and the post-earthquake maintenance and reconstruction costs are reduced.

Description

All-steel double-plate self-resetting anti-buckling support device and method

Technical field

The invention relates to an all-steel double-plate self-resetting buckling-proof supporting device and method, and is particularly suitable for a self-resetting buckling support of an all-steel double-plate for application in the field of construction.

Background technique

After the Great Hanshin Earthquake in Japan and the Northridge Earthquake in the United States, engineers realized that the buckling-resistant support members have excellent energy-damping performance and were adopted in a large number of engineering projects in Japan and the United States. In China, in recent years, many buildings have used anti-buckling support systems.

The buckling-resistant support generally consists of an energy consuming inner core, a peripheral restraint, and an unbonded structural layer. Under the action of small earthquakes, the energy-consuming inner core of the buckling-resistant support member is in an elastic stage, providing the lateral stiffness of the main structure; under the action of medium or large earthquakes, the energy-consuming inner core of the buckling-resistant support member first enters the yielding stage. Dissipate a large amount of seismic input energy. The energy consumption mode that originally passed the plastic hinge at both ends of the main body structure is changed to concentrate energy only on the buckling-proof support member, thereby better protecting the main structure.

However, the buckling-resistant support member is a metal damper that consumes energy by yielding of the metal, resulting in a large residual deformation after undergoing a medium or large earthquake. Moreover, the traditional anti-buckling support usually adopts the reinforced concrete peripheral restraint section and the steel and concrete combined peripheral restraint section, which leads to difficulties in control of machining precision and large workload in wet work.

In recent years, domestic and foreign scholars have paid little research on the all-steel self-resetting buckling buckling support, and have not realized the industrialized rapid and integrated production of steel structure self-resetting buckling support.

Summary of the invention

The object of the present invention is to provide an all-steel double-plate self-resetting buckling bucking support device which adopts an all-steel structure, has a simple structure, has small residual deformation after a medium or large earthquake, and has low reconstruction cost. method.

In order to achieve the above technical object, the all-steel double-plate self-resetting buckling bucking device of the present invention is mainly composed of an energy-consuming inner core plate, a peripheral frame restraining member, a force transmission steel plate, a stiffening plate, a reduction rib, an end plate and a rubber plate; The peripheral frame restraining member comprises an I-beam and two channel steels, wherein the energy-consuming inner core plate comprises a middle inner core plate portion and a connecting head portion disposed at both ends, and the middle inner core plate portion of the inner core plate of the energy-consuming inner core plate Rubber plates are arranged on both sides, and the inner core plate portions of the two energy-consuming inner core plates respectively sandwich the left and right sides of the I-shaped steel web, and the length of the inner core plate portion in the middle portion is the same as that of the I-beam, and the energy-consuming inner core The connecting head portions at the two ends of the board extend out of the I-beam, and the stiffening plates are respectively arranged between the connecting head portions of the two energy-consuming inner core plates, and the inner core plate portions of the two energy-consuming inner core plates are respectively provided with work The force-transmitting steel plate with the same length of the word steel, the I-beam is fixed by bolts to the left and right two channel steels, and the energy-consuming inner core plate, the force transmission steel plate and the rubber plate are pressed and fixed, and the outer frame restraining members are on both sides of the energy-consuming inner core. Through the rectangular opening, there are two end plates, and the end plates will Surrounding frame on both sides of the closure member is constrained, with a plurality of reset between two end plates Tendons.

The energy-consuming inner core plate is a single-shaped single-piece steel plate, or the energy-consuming inner core plate is a step-by-step gradual dog-bone shape in which the inner core inner plate portion has a section smaller than the joint portions of the two ends.

The rubber backing plate has a thickness of 1 to 2 mm.

The stiffening plate is welded and welded between the two connecting head portions of the two energy-consuming inner core plates, and the head of the peripherally constrained I-shaped steel web corresponding to the stiffening plate is provided with a gap for accommodating the stiffening plate. A lateral limiting structure for the uneven insertion is provided between the bottom of the notch and the end of the stiffening plate.

The end plate is opened with a rectangular groove in the middle, and penetrates along the connecting section. The end plate and the peripheral frame restraining member and the force transmission steel plate are not welded, and can slide freely along the longitudinal direction of the energy-consuming inner core.

The method for producing the all-steel double-plate self-resetting buckling support device of the invention comprises the following steps:

a. 1 to 2 mm thick rubber sheets are arranged on both sides of the web of the I-beam in the peripheral frame restraining member;

b. Two energy-consuming inner core plates are arranged on the outer sides of the rubber plates on both sides of the I-shaped steel web, and the left side of the energy-consuming inner core is respectively welded to the left end of the outer frame constrained I-beam;

c. arranging a stiffening plate between the joint portions at both ends of the two energy-consuming inner core plates, and welding the stiffened plates;

d. 1 to 2 mm thick rubber plates are arranged on the outer sides of the two energy-consuming inner core plates;

e. A force transmission steel plate is respectively arranged on the thick rubber plates respectively arranged on the outer side of the two energy-consuming inner core plates, and the right end of the force transmission steel plate is respectively welded to the right side of the energy-consuming inner core;

f. Arranging two peripheral channel steels on two sides of two force transmission steel plates, and connecting the peripheral channel steel and the I-beam by bolts;

g. At both ends of the two energy-consuming inner core plates, respectively, through the rectangular groove string upper end plate, until the peripheral frame restraining member, a plurality of resetting ribs are installed between the two end plates.

Advantageous Effects: Compared with the conventional buckling-resistant support member, the present invention has a reset function after a large earthquake or a medium earthquake, which greatly reduces residual deformation; and the anti-buckling support member is compared with the existing self-resetting support member. The inner core plate yield energy replaces the friction energy, thus avoiding problems such as loose bolts, aging of the friction surface, failure and corrosion. It adopts all-steel structure, simple structure and low production cost.

DRAWINGS

Figure 1 is a schematic view of the overall structure of the present invention,

2 is a schematic view of the energy consuming inner core of the present invention,

3 is a schematic view showing the combination of the energy consuming inner core and the force transmission steel plate of the present invention,

Figure 4 is a schematic diagram of the constraint of the peripheral frame of the present invention,

Figure 5 is a plan view of the stiffener of the present invention,

Figure 6 is a plan view of the end plate of the present invention,

Figure 7 is a schematic view showing the combination of the stiffener, the end plate and the resetting rib of the present invention,

Figure 8 is a cross-sectional view taken along line 1-1 of the present invention,

Figure 9 is a cross-sectional view taken along line 2-2 of the present invention,

Figure 10 is an actual engineering application example of the present invention.

In the figure: 1-energy inner core plate, 2-peripheral frame restraint member, 3-transmission steel plate, 4- stiffener plate, 5-reset rib, 6-end plate, 7-rubber plate.

Specific implementation method

The present invention will be further described below in conjunction with the embodiments in the drawings:

As shown in FIG. 1, the all-steel double-plate self-reset buckling support of the present invention comprises an energy-consuming inner core plate 1, a peripheral frame restraining member 2, a force transmission steel plate 3, a stiffening plate 4, a resetting rib 5, and an end plate 6 and The rubber plate 7 is constructed; as shown in FIG. 2 and FIG. 3, the energy-consuming inner core plate 1 is a single-shaped single-piece steel plate, or the energy-consuming inner core plate 1 is a middle portion of the inner core plate portion having a section smaller than the two ends. Staged gradient dog bone shape;

As shown in FIG. 4, the peripheral frame constraining member 2 includes an I-beam 2-1 and two channel steels 2-2, and the energy-consuming inner core plate 1 includes a middle inner core plate portion and a connector provided at both ends. In part, the rubber core plate 7 is disposed on the left and right sides of the inner core plate portion of the inner core of the energy-consuming inner core plate 1. The thickness of the rubber plate 7 is 1 to 2 mm, and the inner core plate portions of the two energy-consuming inner core plates 1 are respectively clamped. The left and right sides of the 2-1 web of the I-beam, the length of the inner core part of the middle section is the same as that of the I-beam 2-1, and the joint portion of the end of the energy-consuming inner core plate 1 extends out of the I-beam 2-1, wherein A grooved steel 2-2 is arranged on both sides of the middle rib of the I-beam 2-1, and the web of the channel 2-2 is placed on the web of the I-beam 2-1, and the I-beam 2-1 is placed. The flange and the channel 2-2 flange are opened at opposite positions of the contact, and are connected together by bolts 8 to form a peripheral constraining frame member 2; the web head of the outer constraining frame I-beam 2-1 is provided with a tempering force. a notch of the plate; the outer constraining frame member 2 is equal in length to the force-transmitting steel plate 3; the right end of the peripheral frame constraining member 2 is symmetrically welded to the right side of the energy-consuming inner core plate 1;

As shown in Figure 5, between the two end portions of the energy-consuming inner core plate 1 is provided with a stiffening plate 4;

As shown in FIG. 6 and FIG. 7, the inner core plate portions of the two energy-consuming inner core plates 1 are respectively provided with the same force-transmitting steel plate 3 as the length of the I-beam 2-1, and the I-beam 2-1 passes the bolts. Fixing the left and right two channel steels 2-2, as shown in Fig. 8 and Fig. 9, a rubber plate 7 is respectively arranged between the two force transmission steel plates 3 and the two channel steels 2-2 to satisfy the energy dissipation inner core plate 1 When the pressure is yielded, it can be freely expanded, and the energy-consuming inner core board 1, the force transmission steel plate 3 and the rubber plate 7 are pressed and fixed, and the two end plates 6 are respectively opened with rectangular openings, which are inserted along the connecting section, and the end plates are respectively No welding with the peripheral frame constraining member 2 and the force transmission steel plate 3, along the length of the energy consuming core Sliding freely, the stiffening plate 4 is welded and welded between the two end portions of the two energy-consuming inner core plates 1, and the peripherally constrained I-beam 2-1 web corresponding to the stiffening plate 4 The head is provided with a notch for accommodating the stiffening plate, and a lateral limiting structure for the concave and convex insertion is arranged between the bottom of the notch and the end of the stiffening plate 4, and a plurality of reducing ribs 5 are disposed between the two end plates 6.

As shown in Fig. 10, an example in which the present invention is installed in an actual project, the connector portions at both ends of the energy-consuming inner core plate 1 are respectively connected to the structural structural frame node plate through the pin shaft to complete the installation.

The method for producing the all-steel double-plate self-resetting buckling support device of the invention has the following steps:

a. 1 to 2 mm thick rubber sheet 7 is arranged on both sides of the web of the I-beam 2-1 in the peripheral frame restraining member 2;

b. Two energy-consuming inner core plates 1 are arranged on the outer sides of the rubber plates 7 on both sides of the 2-1 web of the I-beam, centering, the left side of the energy-consuming inner core 1 and the outer frame constraining the I-beam 2 1 welding at the left end;

c. arranging a stiffening plate 4 between the connecting head portions at both ends of the two energy-consuming inner core plates 1, and welding the stiffening plate 4;

d. Between the two energy-consuming inner core sheets 1 are respectively arranged 1 ~ 2mm thick rubber sheet 7;

e. The load-bearing steel plate 3 is respectively arranged on the thick rubber plates 7 respectively disposed on the outer sides of the two energy-consuming inner core plates 1, and the right ends of the force-transmitting steel plates 3 are respectively welded to the right side of the energy-consuming inner core 1;

f. Two peripheral channels 2-2 are respectively arranged on both sides of the two force transmission steel plates 3, and the peripheral channel steel 2-2 is connected with the I-beam 2-1 by bolts;

g. At both ends of the two energy-consuming inner core plates 1, respectively, through the rectangular groove string upper end plate 6, until the peripheral frame restraining member 2, a plurality of resetting ribs 5 are installed between the two end plates 6.

Claims

An all-steel double-plate self-resetting buckling support device is characterized in that it consists of an energy-consuming inner core plate (1), a peripheral frame restraining member (2), a force transmission steel plate (3), a stiffening plate (4), and a reset a rib (5), an end plate (6) and a rubber sheet (7); the peripheral frame restraining member (2) comprises an I-beam (2-1) and two channels (2-2), the consumption The inner core plate (1) comprises a middle core plate portion and a joint portion provided at both ends, and a rubber plate (7) is disposed on the left and right sides of the inner core plate portion of the middle portion of the energy-consuming inner core plate (1), two consumptions The inner core plate portion of the inner core plate (1) sandwiches the left and right sides of the web of the I-beam (2-1), and the length of the inner core plate portion of the inner core plate is the same as that of the I-beam (2-1). The joint portion at both ends of the inner core plate (1) protrudes from the I-beam (2-1), and the joint portions of the two energy-consuming inner core plates (1) are respectively provided with a stiffening plate (4), two The inner core plate portion of the inner core of the energy-consuming inner core plate (1) is respectively provided with a force transmission steel plate (3) having the same length as the I-beam (2-1), and the I-beam (2-1) is fixed by bolts. One channel steel (2-2), the energy-consuming inner core plate (1), the force transmission steel plate (3) and the rubber plate (7) are pressed and fixed, and the peripheral frame is restrained Both ends of the member (2) are pierced with two end plates (6) through the rectangular opening on the energy-consuming inner core, and the end plate (6) closes the two sides of the peripheral frame restraining member (2), and the two end plates (6) There are several resetting ribs (5) between them.
The all-steel double-plate self-resetting buckling buckling support device according to claim 1, wherein the energy-consuming inner core plate (1) is a single-shaped single-piece steel plate, or the energy-consuming inner core plate (1) is The section of the core section in the middle section is smaller than the phase-graded dog-bone shape of the joint portion at both ends.
The all-steel double-plate self-resetting buckling buckling support device according to claim 1, wherein the rubber backing plate (7) has a thickness of 1 to 2 mm.
The all-steel double-plate self-resetting buckling buckling support device according to claim 1, wherein the stiffening plate (4) is welded to the connecting end portions of the two energy-consuming inner core plates (1). The head of the web of the peripheral restraining I-beam (2-1) corresponding to the stiffening plate (4) is provided with a notch for accommodating the stiffening plate, and the bottom of the notch and the end of the stiffening plate (4) A lateral limit structure is provided between the bumps and the inserts.
The all-steel double-plate self-resetting buckling buckling support device according to claim 1, wherein the end plate is opened with a rectangular groove in the middle, and penetrates along the connecting portion, and the end plate and the peripheral frame restraining member and the force transmission plate are both Without welding, it can slide freely along the length of the energy core.
The invention discloses a method for producing an all-steel double-plate self-resetting buckling support device, which comprises the following steps:

a. 1 to 2 mm thick rubber plate (7) is arranged on both sides of the web of the I-beam (2-1) in the peripheral frame restraining member (2);

b. Two energy-consuming inner core plates (1) are arranged on the outer sides of the rubber plates (7) on both sides of the web of the I-beam (2-1), and the left side of the energy-consuming inner core (1) is respectively The peripheral frame constrains the left end of the I-beam (2-1) to be welded;

c. Arrange the stiffening plate (4) between the connecting head portions at both ends of the two energy-consuming inner core plates (1), and the stiffening plate (4) Perform weld joints;

d. 1~2mm thick rubber plate (7) is arranged on the outer side of the two energy-consuming inner core plates (1);

e. Place the force transmission steel plate (3) on the thick rubber plates (7) respectively disposed on the outer sides of the two energy-consuming inner core plates (1), and the right end of the force transmission steel plate (3) and the energy-consuming inner core (1) respectively Side welding

f. Two peripheral channel steels (2-2) are respectively arranged on both sides of the two force transmission steel plates (3), and the peripheral channel steel (2-2) is connected with the I-beam (2-1) by bolts;

g. Install two sets of return ribs between the two end plates (6) through the rectangular groove string upper end plate (6) at both ends of the two energy-consuming inner core plates (1) until the peripheral frame restraining member (2) (5).