CN105507445A - Outer casing pipe constraint folding steel plate energy consumption support - Google Patents

Abstract

The invention discloses an outer casing pipe constraint folding steel plate energy consumption support. The support comprises an outer casing pipe, a core barrel arranged in the outer casing pipe, end bearing plates arranged at barrel openings of the two sides of the core barrel and outer casing pipe seal plates arranged at the ends of the two side of the outer casing pipe; the end bearing plates are connected with cross-shaped node plates penetrating through the outer casing pipe seal plates, and the core barrel is formed by sequentially connecting multiple energy consumption units. The support reduces earthquake responses of buildings through the good post-yielding energy consumption capacity, is easy to manufacture and convenient to install and can be applied to structural earthquake resisting and effectively reduce earthquake disasters.

Description

The folding steel plate energy dissipation brace of outer tube constraint

Technical field

The invention belongs to building structure energy dissipation brace field, relate to the folding steel plate energy dissipation brace of a kind of outer tube constraint.

Background technology

Earthquake disaster has sudden and crushing, threatens the safety of human life's property.For building, because building earthquake response is excessive, building is caused to occur the phenomenon losing its using function, heavy damage is even collapsed.For reducing the disaster that earthquake brings, energy-dissipating and shock-absorbing technology is widely used in structure design.Wherein, the development & application of buckling restrained brace is exactly a representative technology.

Buckling restrained brace is formed primarily of parts such as central layer, outer tube, non-cohesive materials.In this technology, central layer is main stress unit, and under geological process, central layer deforms and consumes the energy that earthquake inputs, thus reaches the object of protection main body frame.Outer tube is by the constraint to central layer, and preventing central layer from producing lateral buckling affects its energy consumption effect.

But current buckling-restrained energy dissipation brace plastic hinge occurs less, the energy dissipation capacity of monoblock central layer can not be played, the yield point position of uncontrollable central layer, the quantity that uncontrollable plastic hinge occurs, this just makes the energy-dissipating property of whole support can not realize accurate control, thus gets a desired effect.

Summary of the invention

Technical problem: the invention provides a kind of core cylinder utilizing folding steel plate to be formed and replace central layer as main bearing member, after the surrender utilizing it good, energy dissipation capacity reduces the seismic response of building, make simple, be convenient to install, structural seismic aspect can be applied to, effectively the folding steel plate energy dissipation brace of outer tube constraint of earthquake disaster mitigation.

Technical scheme: the folding steel plate energy dissipation brace of outer tube constraint of the present invention comprises outer tube, be arranged on the core cylinder in described outer tube, be arranged on the termination bearing plate of described core cylinder both sides nozzle, be arranged on the outer tube shrouding of outer tube both side ends, described termination bearing plate is connected with the cruciform gusset plate through outer tube shrouding, described core cylinder is connected in sequence by multiple power consumption unit, described power consumption unit comprises 4n antarafacial triangle, wherein 2n is first kind triangle, 2n is Equations of The Second Kind triangle, every two first kind vertex angle connect setting, form a grouping, every two Equations of The Second Kind triangle base connect setting, form a grouping, the grouping of first kind triangle is divided into groups adjacent connection with Equations of The Second Kind triangle, be spliced into a cylindrical member, n is power consumption shape limit, unit end face polygon limit number, and n >=3.

Further, in the present invention, described outer tube shrouding is provided with " ten " font seam corresponding with cruciform gusset plate.

Further, in the present invention, the size of described termination bearing plate and the nozzle of core cylinder measure-alike.

Further, in the present invention, there is gap between described outer sleeve inner wall and core cylinder, be wherein filled with non-cohesive material.

Further, in the present invention, described cruciform gusset plate is welded with vertical stiffening rib.

Folding steel plate energy dissipation brace adopts the mode of punching press to make it occur folding line to steel plate, be equivalent to introduce initial imperfection among steel plate, and then the position occurring plastic hinge can be controlled, make plastic hinge appear near folding line, the quantity of plastic hinge can also be controlled by the quantity controlling folding line.Then the Plate Welding after punching press is become tubular, add stability simultaneously, not easily out-of-plane buckling occurs.

Folding steel plate energy dissipation brace is made up of core cylinder, outer tube, termination bearing plate, outer tube shrouding, cruciform gusset plate, non-cohesive material, stiffening rib; Its SMIS cylinder becomes tubular by general steel plate through punch welding, and its folded section is made up of the power consumption unit that physical dimension is identical.And power consumption cell cube four sides all adopts identical folding line, its structural form is relatively simple, easy to make; Termination bearing plate is connected with core cylinder, cruciform gusset plate, and load is passed to core cylinder uniformly.There is excessive distortion and affect the energy-dissipating property of whole support in outer tube restriction power consumption section folding line place.Outer tube shrouding limits the position of outer tube, and cruciform gusset plate passes therethrough, and core cylinder and framework is linked together, cruciform gusset plate is welded with stiffening rib, prevents cruciform gusset plate compressive buckling.

The folding steel plate energy dissipation brace of outer tube constraint of the present invention, is made up of seven parts, is respectively outer tube, termination bearing plate, core cylinder, cruciform gusset plate, outer tube shrouding, non-cohesive material, stiffening rib.

Its core is core cylinder, and core cylinder has embodied a concentrated reflection of the design principle of invention, and is described for during n=4.

Described core cylinder, as shown in Fig. 14, that steel plate forms through punch welding, the power consumption unit be made up of one or more simple geometry figures can be formed through punching press, then form tubular through welding, as shown in Figure 6, for ensureing good energy dissipation capacity, just with processing, steel used preferentially adopt mild steel, Q235 or high performance steel, and steel plate thickness used should not be greater than 50mm.

Described outer tube, as shown in Fig. 11, the preferential steel that adopt are made, and can be round steel pipe, square steel pipe, existing steel pipe specification on preferential use market.

Described outer tube shrouding adopts the material identical with outer tube, and thickness of slab is about 1.5-2.0 times of outer tube thickness, is welded in outer tube two ends, and as shown in Fig. 12, diameter is identical with outer tube external diameter.

Described non-cohesive material is arranged between core cylinder and outer tube, and as shown in Fig. 16, non-cohesive material is the layer of silica gel that 2mm is thick, is used for weakening the friction between outer tube and core cylinder.

Described termination bearing plate is arranged at core cylinder both ends, as shown in Fig. 13, is high strength steel plate is cut into the hexahedron with the unit side-anastomosis that consumes energy, is welded in core cylinder two ends.

Described cruciform gusset plate, as shown in Fig. 15, adopts the steel identical with termination bearing plate, is welded on the bearing plate of termination.

Described stiffening rib, as shown in Fig. 17, has four roads, and per pass is all made up of four identical triangular steel plate, is welded on cruciform gusset plate.

Beneficial effect: the present invention compared with prior art, has the following advantages:

Existing buckling restrained brace adopts outer tube to limit the flexing of its central layer, and position and the quantity of plastic hinge appear in uncontrollable central layer, make the energy dissipation capacity of existing buckling restrained brace not reach desirable effect.Creationaryly in the present invention introduce core cylinder, and outer tube is set outside core cylinder, make core cylinder and outer tube collaborative work, when core cylinder bearing load contacts with outer tube, utilize contacting with each other of outer tube and core cylinder, increase the rigidity of core cylinder, improve its ultimate bearing capacity, the hysteretic energy performance of core cylinder can also be improved simultaneously, thus consume the energy that earthquake inputs building when earthquake better.

The side of this core cylinder all adopts triangle folding line, folding line form is succinct, be convenient to carry out punching press making, when bearing geological process, mainly be subject to the axial load that building frame transmits, this axial load can be pulling force, also can be pressure, when it is subject to load action, can occurs to stretch or compressive strain, this core cylinder is slided in outer tube, outer tube produces effect of contraction to core cylinder, prevent core cylinder generation out-of-plane buckling, make it can only occur to stretch or compression, to guarantee its energy-dissipating property at its length direction.

In the present invention, central layer in existing buckling restrained brace is replaced by the core cylinder formed by folding steel plate by the folding steel plate energy dissipation brace of outer tube constraint, optimize its Energy Dissipation Mechanism, increase its hysteretic energy ability under low cycling loads, steel plate is made to occur a series of triangle folding line by punching press plain plate, thus this core cylinder is extensible, folding line is equivalent to introduce defect artificially, make this be supported on folding line place and occur that plastic hinge absorbs energy, the number that plastic hinge (line) occurs can also be controlled by the quantity controlling folding line simultaneously, make it have good plasticity distribution, core cylinder can realize many places folding line and occur plastic hinge, add the energy dissipation capacity of support, and on the cruciform gusset plate of this support, be welded with stiffening rib to prevent from, during its pressurized, flexing occurs.

The present invention produces pre-folding line by folding steel plate, yield line can be produced at folding line place when bearing load, utilize yield line to increase the energy dissipation capacity of this support, simultaneously at the outer setting sleeve pipe of core cylinder, improve the hoop constraint to core cylinder, be convenient to the rigidity and the ultimate bearing capacity that improve this support.This support processing and fabricating is simple, and easy for installation, having good shock resistance and energy dissipation capacity, is a kind of outstanding energy dissipation component.

Accompanying drawing explanation

Fig. 1 is folding steel plate energy dissipation brace constructional drawing.

Fig. 2 is outer tube shrouding both sides constructional detail

Fig. 3 is core cylinder inner member connection layout

Fig. 4 is A-A cross-sectional configuration figure

Fig. 5 is outer tube shrouding

Fig. 6 is power consumption unit module constructional drawing, and wherein Fig. 6 a is power consumption unit shaft mapping, and Fig. 6 b is power consumption unit left view, and Fig. 6 c is power consumption unit elevation

Fig. 7 is power consumption units folded schematic diagram, and wherein dotted line is indenture

Fig. 8 is power consumption cell node coordinate schematic diagram.

Fig. 9 is power consumption unit size schematic diagram, and wherein Fig. 9 a is the projection of power consumption unit to YZ face, and Fig. 9 b is one in the congruent triangles of this unit of composition.

Have in figure: 1. outer tube, 2. outer tube shrouding, 3. termination bearing plate, 4. core cylinder, 5. cruciform gusset plate, 6. non-cohesive material, 7. stiffening rib.

Detailed description of the invention

Below in conjunction with embodiment and Figure of description, the present invention is further illustrated.

Embodiment 1

Shown in following Fig. 1 to Fig. 6, the present invention is made up of outer tube 1, outer tube shrouding 2, termination bearing plate 3, core cylinder 4, cruciform gusset plate 5, non-cohesive material 6, stiffening rib 7 seven part.Core cylinder 4 forms different simple geometry figures by steel plate through punching press, then carries out being welded to tubular.As shown in Figure 6, in the present embodiment, the geometric figure on core cylinder 4 is the combination of isosceles triangle.Fig. 7 is the folding line pattern in this embodiment, and wherein dotted line is indenture, and then two ends carry out welding.As shown in Figure 2, what be connected with core cylinder 4 is termination bearing plate 3, and termination bearing plate 3 is welded in core cylinder 4 nozzle four limit, and termination bearing plate 3 size and core cylinder 4 nozzle measure-alike.Termination bearing plate 3 opposite side welds with cruciform gusset plate 5, cruciform gusset plate 5, through outer tube shrouding 2, is connected with the structural framing of building, and on cruciform gusset plate, arranges twice stiffening rib 7, this stiffening rib is four triangular steel plate, is welded on cruciform gusset plate.As shown in Figure 5, outer tube shrouding 2 has " ten " font seam, so that cruciform gusset plate 5 passes.Outer tube shrouding 2 adopts Type of Welding to be connected with outer tube 1, and outer tube 1 inwall and core cylinder 4 maintain a certain distance.Outer tube 1 inwall is coated with non-cohesive material, and this non-cohesive material adopts layer of silica gel, and thickness is 2mm.

Embodiment 2

The present embodiment is identical with embodiment 1 remainder, is changed to square tube to provide constraint unlike by outer tube 1 pipe.

In order to the spatial configuration of more clearly expressor unit, set up the coordinate that rectangular coordinate system in space illustrates each node, as shown in Figure 8, origin of coordinates O is the center of subelement, makes X-axis with the diagonal FH place straight line of quadrangle EFGH, and pointing to H from F is positive direction, Z axis is made with this quadrangle another diagonal EG place straight line, pointing to G by E is positive direction, using cross some O and the straight line vertical with X-axis, Z axis as Y-axis, positive direction be from face ABCD sensing face IJKL.

Power consumption unit size will meet following condition, and (θ is the dihedral angle of △ DCG and △ LKG, α is the angle in △ DCG and XY face, a is the length of side of square ABCD, b is the catercorner length of square EFGH, c is the length of the waist of any one isosceles triangle of composition subelement, d is the height on this isosceles triangle base, and l is the projected length of subelement along Y direction):

$b=\sqrt{2}a:c=\sqrt{{\left(\frac{a}{2}\right)}^2+d^2};d=\frac{l}{2cos\mathrm{\α}};\mathrm{\θ}=\mathrm{\π}-2\mathrm{\α}.$

Each node coordinate is:

$\begin{array}{cccc}A\left(\begin{array}{ccc}\frac{a}{2},& -\frac{l}{2},& -\frac{a}{2}\end{array}\right),& B\left(\begin{array}{ccc}-\frac{a}{2},& -\frac{l}{2},& -\frac{a}{2}\end{array}\right),& C\left(\begin{array}{ccc}-\frac{a}{2},& -\frac{l}{2},& \frac{a}{2}\end{array}\right),& D\left(\begin{array}{ccc}\frac{a}{2},& -\frac{l}{2},& \frac{a}{2}\end{array}\right)\end{array}$

$\begin{array}{cccc}E\left(\begin{array}{ccc}0,& 0,& -\frac{b}{2}\end{array}\right),& F\left(\begin{array}{ccc}-\frac{b}{2},& 0,& 0\end{array}\right),& G\left(\begin{array}{ccc}0,& 0,& \frac{b}{2}\end{array}\right),& H\left(\begin{array}{ccc}\frac{b}{2},& 0,& 0\end{array}\right)\end{array}$

$\begin{array}{cccc}I\left(\begin{array}{ccc}\frac{a}{2},& \frac{l}{2},& -\frac{a}{2}\end{array}\right),& J\left(\begin{array}{ccc}-\frac{a}{2},& \frac{l}{2},& -\frac{a}{2}\end{array}\right),& K\left(\begin{array}{ccc}-\frac{a}{2},& \frac{l}{2},& \frac{a}{2}\end{array}\right),& L\left(\begin{array}{ccc}\frac{a}{2},& \frac{l}{2},& \frac{a}{2}\end{array}\right)\end{array}$

Above-described embodiment is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention; some improvement and equivalent replacement can also be made; these improve the claims in the present invention and are equal to the technical scheme after replacing, and all fall into protection scope of the present invention.

Claims (5)

1. the folding steel plate energy dissipation brace of outer tube constraint, it is characterized in that, this energy dissipation brace comprises outer tube (1), be arranged on the core cylinder (4) in described outer tube (1), be arranged on the termination bearing plate (3) of described core cylinder (4) both sides nozzle, be arranged on the outer tube shrouding (2) of outer tube (1) both side ends, described termination bearing plate (3) is connected with the cruciform gusset plate (5) through outer tube shrouding (2), described core cylinder (4) is connected in sequence by multiple power consumption unit, described power consumption unit comprises 4n antarafacial triangle, wherein 2n is first kind triangle, 2n is Equations of The Second Kind triangle, every two first kind vertex angle connect setting, form a grouping, every two Equations of The Second Kind triangle base connect setting, form a grouping, the grouping of first kind triangle is divided into groups adjacent connection with Equations of The Second Kind triangle, be spliced into a cylindrical member, n is power consumption shape limit, unit end face polygon limit number, and n >=3.

2. the folding steel plate energy dissipation brace of outer tube constraint according to claim 1, is characterized in that, described outer tube shrouding (2) is provided with " ten " font corresponding with cruciform gusset plate (5) and stitches.

3. the folding steel plate energy dissipation brace of outer tube according to claim 1 and 2 constraint, is characterized in that, the size of described termination bearing plate (3) and the nozzle of core cylinder (4) measure-alike.

4. the folding steel plate energy dissipation brace of outer tube constraint according to claim 1 and 2, is characterized in that there is gap between described outer tube (1) inwall and core cylinder (4), is wherein filled with non-cohesive material (6).

5. the folding steel plate energy dissipation brace of outer tube constraint according to claim 1 and 2, is characterized in that, described cruciform gusset plate (5) is welded with vertical stiffening rib (7).