CN103669630B - Clean steel box shape steel buckling restrained brace - Google Patents

Abstract

The present invention relates to a kind of clean steel box shape steel buckling restrained brace, it comprises the sleeve that a box shape steel and are enclosed within box shape steel outside; Described box shape steel is a rectangular tube, and in the middle part of the four edges at its two ends, symmetry offers groove respectively, is welded with cross stiffening rib in groove; Four faces of described sleeve lining are all arranged with channel-section steel, and often pair of channel-section steel is arranged dorsad, and its back holds out against each face of box shape steel respectively; Described cross stiffening rib be two pieces band grooves slab normal intersect be welded.The invention enables the design of buckling restrained brace more flexible, cost is cheaper, and performance is more excellent, and applicability is stronger.

Description

Clean steel box shape steel buckling restrained brace

Technical field

The present invention relates to a kind of buckling restrained brace, specifically clean steel box shape steel buckling restrained brace.

Background technology

Earthquake is the extremely strong natural calamity of a kind of destructiveness and randomness, bring grave danger can to the life of the mankind and property safety.Traditional seismic design relies on structure self opposing geological process, and not only efficiency is lower, and agent structure will be difficult to damage invariably occurs or destroys in earthquake, can affect the normal usage function of structure, cause the generation of secondary disaster.From the viewpoint of the conservation of energy, the main cause that structure is collapsed under rarely occurred earthquake is the energy that the energy dissipation capacity of himself is not enough to consume Seismic input structure, thus causes the critical component generation fatigue fracture such as node, beam, post of structure to destroy.Installing energy-consumption shock-absorption device for building structure is reduce structural earthquake damage effective means; it can absorb large energy in earthquake; make damage concentration in energy-consumption shock-absorption device itself, thus play protection agent structure, reduce the effect of structural key placement members damage.

Usual buckling restrained brace has two kinds of principal modes, and namely (1) take concrete filled steel tube as the buckling restrained brace of tied mechanism, and the buckling restrained brace deadweight of this type is comparatively large, and the process-cycle is poor, and processing technology is also comparatively complicated; (2) clean steel type buckling restrained brace, this kind supports by realizations such as steel bushings of putting more energy into the effect of contraction of power consumption unit, although deadweight is comparatively light, process velocity is very fast, and cost also can correspondingly promote.

The core cell of buckling restrained brace has two kinds of buckling failure patterns under axial compression effect, i.e. complete buckling and cripling.Existing clean steel type buckling restrained brace is all the generation of these the two kinds of buckling failure patterns being limited core cell by construction measures such as stiffening ribs.Common core cell has " one " font plate and " ten " font compound section and H profile steel.But existing clean steel type buckling restrained brace all have ignored a major issue when designing, core cell self is not namely utilized to resist the ability of cripling.The reason of this phenomenon is caused to be, the section of core cell, the edge of a wing as " one " font plate and " ten " font compound section and H profile steel is parts of encorbelmenting, very easily cripling is there is under the effect of axle power, therefore existing clean steel type buckling restrained brace can not utilize core cell self to resist the ability of cripling, causes macroeconomic and declines.

Summary of the invention

The present invention is intended to the defect overcoming prior art, provides a kind of clean steel box shape steel buckling restrained brace, and make the design of buckling restrained brace more flexible, cost is cheaper, and performance is more excellent, and applicability is stronger.

In order to solve the problems of the technologies described above, the present invention is achieved in that

A kind of clean steel box shape steel buckling restrained brace, is characterized in that: it comprises the sleeve that a box shape steel and are enclosed within box shape steel outside;

Described box shape steel is a rectangular tube, and in the middle part of the four edges at its two ends, symmetry offers groove respectively, is welded with cross stiffening rib in groove;

Four faces of described sleeve lining are all arranged with channel-section steel, and often pair of channel-section steel is arranged dorsad, and its back holds out against each face of box shape steel respectively.

Described clean steel box shape steel buckling restrained brace, is characterized in that: described cross stiffening rib be two pieces band grooves slab normal intersect be welded.

The invention has the beneficial effects as follows: adopt cross stiffening rib as steel node, box shape steel is as power consumption steel core, and make both transition and conversion by rational structure measure, adopt the measure inserting channel-section steel at restraining tube sleeve inner localised spacer, reduce the bending length of core power consumption unit, ensure that its resistance to overturning, and reduce steel using amount to greatest extent, make the design of buckling restrained brace more flexible, cost is cheaper, performance is more excellent, and applicability is stronger.

Accompanying drawing explanation

Below in conjunction with drawings and embodiments, the present invention is described in further detail:

Fig. 1 is schematic diagram of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the lateral view of Fig. 1;

Fig. 4 is 2-2 sectional view in Fig. 1;

Fig. 5 is 3-3 sectional view in Fig. 1;

Fig. 6 is 4-4 sectional view in Fig. 1;

Fig. 7 is 5-5 sectional view in Fig. 1;

Fig. 8 is the schematic diagram of the flat board of band groove;

Fig. 9 of the present inventionly arranges schematic diagram.

Detailed description of the invention

As shown in Fig. 1-Fig. 7: a kind of clean steel box shape steel buckling restrained brace, it comprises the sleeve 5 that a box shape steel 1 and are enclosed within box shape steel outside; Box shape steel is a rectangular tube, and in the middle part of the four edges at its two ends, symmetry offers groove respectively, is welded with cross stiffening rib 2 in groove; As shown in Figure 8: cross stiffening rib is that the flat board 7 of two pieces of band grooves intersects vertically and is welded.Four faces of sleeve 5 inwall are all arranged with channel-section steel 3, and often pair of channel-section steel is arranged dorsad, and its back holds out against each face of box shape steel respectively.

As shown in Figure 9: described clean steel box shape steel buckling restrained brace, its skewed horizontal load is arranged between column 8 and back timber 9.

Four faces of composition box-type section retrain each other and support, and greatly can strengthen the ability of anti-cripling during its pressurized.According to China " Code for design of steel structures ", if be rectangular tube form by the power consumption core design of buckling restrained brace, its flakiness ratio only needs to meet and is not more than ( for steel yield strength standard value) it just can be made to surrender power consumption and cripling phenomenon does not occur, and this condition is very easy to meet.Utilize this characteristic and advantage of rectangular tube, it can be used as power consumption core, so concerning the design of buckling restrained brace, only need to ensure its resistance to overturning.

Claims (2)

1. a clean steel box shape steel buckling restrained brace, is characterized in that: it comprises the sleeve that a box shape steel and are enclosed within box shape steel outside;

Described box shape steel is a rectangular tube, and in the middle part of the four edges at its two ends, symmetry offers groove respectively, is welded with cross stiffening rib in groove;

Four faces of described sleeve lining are all arranged with channel-section steel, and often pair of channel-section steel is arranged dorsad, and its back holds out against each face of box shape steel respectively.

2. clean steel box shape steel buckling restrained brace according to claim 1, is characterized in that: described cross stiffening rib be two pieces band grooves slab normal intersect be welded.