CN103437450A - Anti-buckling low yield point steel-composite energy dissipation brace - Google Patents
Anti-buckling low yield point steel-composite energy dissipation brace Download PDFInfo
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- CN103437450A CN103437450A CN201310414759XA CN201310414759A CN103437450A CN 103437450 A CN103437450 A CN 103437450A CN 201310414759X A CN201310414759X A CN 201310414759XA CN 201310414759 A CN201310414759 A CN 201310414759A CN 103437450 A CN103437450 A CN 103437450A
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Abstract
The invention discloses an anti-buckling low yield point steel-composite energy dissipation brace, comprising an inner core stress unit which is integrally sealed and coated by a peripheral composite constraint unit, wherein the inner core stress unit is a low yield point steel kernel steel core; the peripheral composite constraint unit is formed by a ribbed glass fiber reinforced polymer (GFRP) pipe, and contoured foams in the pipe; GFRP rib plates inside the pipe are evenly distributed; the kernel steel core and the peripheral composite constraint unit are integrally molded at one time in a vacuum importing manner; screw holes are formed in connecting parts at two ends of the kernel steel core; GFRP stiffening ribs vertical to the kernel steel core are respectively arranged at two ends of the kernel steel core. According to the anti-buckling low yield point steel-composite energy dissipation brace, the GFRP rib plates directly contact the inner core stress unit of the brace; external energy dissipated by the inner core stress unit is constrained by a composite, so that the brace is free of buckling; the carrying capacity of the brace is improved. The brace is integrally molded once in the vacuum importing manner, is corrosion-resistant, low in full-life maintenance cost, light in weight, high in strength, convenient to transport, install and construct, strong in designability, convenient to mold, and quick to produce in batch, and can be flexibly designed according to the requirements.
Description
Technical field
The power consumption that the present invention relates to a kind of building structure is supported, and particularly a kind ofly exempts from flexing Low Yield Point Steel-composite material power consumption and supports.
Background technology
Common support pressurized can produce the flexing phenomenon, and after supporting the pressurized flexing, rigidity and bearing capacity sharply reduce.Under earthquake or wind action, the internal force of support back and forth changes under pressurized and tension two states, thereby the common Hysteresis Behavior that is supported under course under cyclic loading is poor.
Existing buckling restrained brace mainly is comprised of three parts: inner core stress unit (core), nothing bonding expandable material, buckling-restrained unit.Mainly can be divided into two kinds: a kind of is to using steel concrete or concrete filled steel tube as confining part, usings the mixed type buckling restrained brace of steel as inner core member; Another kind is all steel type buckling restrained brace that confining part and inner core member are steel.
Although existing buckling restrained brace can solve common support pressurized flexing and the poor problem of Hysteresis Behavior, itself also comes with some shortcomings: (1) mixed type buckling-restrained bracing member is from great, and volume is large.For Steel Tower Structures the time, support in the situation that vertical scale is larger, may have the initial deflection distortion from great supporting member in installation, use procedure, this can have a negative impact to support performance, simultaneously, also be not easy to installation from great buckling-restrained bracing member.In addition, rotproofness is poor is also the problem that the mixed type buckling restrained brace exists.(2) all steel type buckling restrained brace quality is relatively light, but higher to requirement for anticorrosion, is applied to outdoor structural maintenance cost higher.Therefore existing buckling restrained brace exists that deadweight is excessive, complex structure, corrosion resistance are poor, involve great expense, some position easily occurs that stress the problem such as concentrates.
Nearly ten years, brand-new material---
glass fiberstrengthen
plastics(FRP) with its lightweight, the advantage such as high-strength, corrosion-resistant, in the Structural Engineering field, be widely applied.FRP has now become the important supplement of the traditional structural materials such as concrete, steel, reasonably FRP is applied in all kinds of works become an important directions of Structural Engineering development.Glass fiber reinforced unsaturated polyester resin based composites (GFRP) is in China also existing the extensive application, and price is relatively cheap.GFRP has following plurality of advantages: 1. high-strength light, relative density, between 1.5～2.0, only has 1/4～1/5 of carbon steel, hot strength is steel 1 ~ 3 times, its specific strength (ultimate strength/unit weight) relatively is far above steel.2. corrosion resistance and good, GFRP is good anticorrosive material, and atmosphere, water and general acid-alkali salt and multiple oils are had to stronger resistivity, while therefore replacing steel without antirust processing and daily anticorrosion.3. good heat resistance, thermal conductivity are low, only have the l/100 of metal～1/200 under room temperature, are desirable thermally protective materials.4. ultimate deformation is large, and the place (as antidetonation) high at Ductility Requirement is more applicable.5. GFRP also has the characteristics such as insulation, insulation, sound insulation, life-span length.6. designability is good.GFRP also has characteristics, and its modulus of elasticity is very low, be approximately steel modulus of elasticity 1/10.
Summary of the invention
For solving above-mentioned the deficiencies in the prior art, the characteristics such as high-strength light, the modulus of elasticity that takes full advantage of GFRP is low than steel, corrosion resistance, the present invention proposes a kind of flexing Low Yield Point Steel-composite material power consumption support of exempting from, composite material GFRP integral sealing parcel for periphery at kernel low-yield steel, be intended to solve common support pressurized flexing and the poor problem of Hysteresis Behavior.
For achieving the above object, technical scheme of the present invention is:
A kind ofly exempt from the power consumption of flexing Low Yield Point Steel-composite material and support, by peripheral composite constraining whole unit sealed envelope inner core stress unit, formed, described inner core stress unit is low-yield steel kernel steel core, peripheral composite constraining unit consists of contoured foam in GFRP pipe with ribbing and pipe, in pipe, the GFRP floor is uniformly distributed, kernel steel core and peripheral composite constraining unit adopt vacuum to import disposal integral molding, kernel steel core two ends connecting portion is provided with screw, at the two ends of kernel steel core, perpendicular GFRP stiffening rib is set respectively.
Further, described kernel steel core adopts the 08F steel.
Further, described kernel steel core is a word, cross or I shape kernel steel core.
Further, the flow process of described vacuum guiding and forming technique is:
(1) prepare mould: should guarantee that in manufacturing process die edge reserves necessary space, be convenient to the laying of weather strip and pipeline, after the mould preparation, the reply mould is cleared up, is beaten demoulding wax or smeared demoulding water;
(2) make the kernel steel core;
(3) processing and fabricating polyurethane foam bar, exempting from flexing Low Yield Point Steel-composite material power consumption supports and usings GFRP rectangular tube with ribbing as constraint element, GFRP floor molding mode is by polyurethane foam bar outsourcing glass fabric, after resin imports, gets final product curing molding GFRP floor; The punching of should slotting of the polyurethane foam bar of well cutting, be convenient to the circulation of resin;
(4) by polyurethane foam bar parcel glass fabric;
(5) lay glass fabric and reach fixedly core; At first lay the bottom glass fabric in wood mould; Then, the steel core material and the foam core material that process are put into to wood mould in order; Finally, lay the skin glass cloth on mould;
(6) lay release cloth; Lay release cloth on test specimen, the effect of release cloth is that test specimen is convenient in demoulding.Should lay mozzle, flow-guiding cloth on release cloth, its effect is the circulation of being convenient to resin simultaneously, guarantees the quality that resin imports;
(7) vacuumize; After laying vacuum bag formation sealing system, clamp into pitch tube, whole system is vacuumized; The system Air is found time, and check the system tightness;
(8) import resin; After vacuumizing and reaching certain requirement, prepare resin; Allocate curing compound into by gel time; Insert in the resin prepared advancing the resin pipeline, according to the charging order, open successively clip, note the amount of resin, supplement in time in case of necessity;
(9) demoulding; After resin solidification, take out goods from mould.
Further, described GFRP pipe with ribbing is for square or circular.
Further, described contoured foam is polyurethane foam.
With respect to prior art, beneficial effect of the present invention is:
Kernel steel core of the present invention is wrapped up by composite material GFRP integral sealing, and the GFRP floor directly contacts with supporting the inner core stress unit, by composite constraining inner core stress unit dissipation external energy, makes to support and exempts from flexing, has improved the supporting capacity supported.Support and adopt vacuum to import disposal integral molding,, by composite material GFRP sealed envelope, there is not corrosion problems in whole support, supports the life-cycle maintenance cost low.Due to the GFRP high-strength light, this support alleviates greatly than traditional buckling restrained brace quality, is convenient to transportation, installation.And this support designability is strong, convenient formation, flexible design, volume production fast as required.
The accompanying drawing explanation
Fig. 1 is generalized section of the present invention.
Fig. 2 is positive elevational schematic view of the present invention.
Fig. 3 is linkage section sectional drawing of the present invention.
The specific embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
A kind ofly exempt from the power consumption of flexing Low Yield Point Steel-composite material and support, by peripheral composite constraining whole unit sealed envelope inner core stress unit, formed, described inner core stress unit is low-yield steel kernel steel core, peripheral composite constraining unit consists of contoured foam in GFRP pipe with ribbing and pipe, in pipe, the GFRP floor is uniformly distributed, kernel steel core and peripheral composite constraining unit adopt vacuum to import disposal integral molding, filling molding foam in GFRP pipe when one-body molded, kernel steel core two ends connecting portion is provided with screw, at the two ends of kernel steel core, perpendicular GFRP stiffening rib is set respectively.
Further, described kernel steel core adopts the 08F steel.
Further, described kernel steel core is a word, cross or I shape kernel steel core.
Further, the flow process of described vacuum guiding and forming technique is:
(1) prepare mould: should guarantee that in manufacturing process die edge reserves necessary space, be convenient to the laying of weather strip and pipeline, after the mould preparation, the reply mould is cleared up, is beaten demoulding wax or smeared demoulding water;
(2) make the kernel steel core;
(3) processing and fabricating polyurethane foam bar, exempting from flexing Low Yield Point Steel-composite material power consumption supports and usings GFRP rectangular tube with ribbing as constraint element, GFRP floor molding mode is by polyurethane foam bar outsourcing glass fabric, after resin imports, gets final product curing molding GFRP floor; The punching of should slotting of the polyurethane foam bar of well cutting, be convenient to the circulation of resin;
(4) by polyurethane foam bar parcel glass fabric;
(5) lay glass fabric and reach fixedly core; At first lay the bottom glass fabric in wood mould; Then, the steel core material and the foam core material that process are put into to wood mould in order; Finally, lay the skin glass cloth on mould;
(6) lay release cloth; Lay release cloth on test specimen, the effect of release cloth is that test specimen is convenient in demoulding.Should lay mozzle, flow-guiding cloth on release cloth, its effect is the circulation of being convenient to resin simultaneously, guarantees the quality that resin imports;
(7) vacuumize; After laying vacuum bag formation sealing system, clamp into pitch tube, whole system is vacuumized; The system Air is found time, and check the system tightness;
(8) import resin; After vacuumizing and reaching certain requirement, prepare resin; Allocate curing compound into by gel time; Insert in the resin prepared advancing the resin pipeline, according to the charging order, open successively clip, note the amount of resin, supplement in time in case of necessity;
(9) demoulding; After resin solidification, take out goods from mould.
Further, described GFRP pipe with ribbing is for square or circular.
Further, described contoured foam is polyurethane foam.
The present invention is a kind of to exempt from flexing Low Yield Point Steel-composite material power consumption and supports, and during work, inner core stress unit and restraining tube unit are done as a whole stressed, support the axial push-pull power of bearing and are jointly born by inner core stress unit and restraining tube unit.The inner core stress unit can reach surrender when tension.Because the elastic modulus E of GFRP
cbe less than the elastic modulus E of steel
s so be out of shape under consistent condition, composite material can consume more energy.When supporting pressurized, steel product stress first reaches yield strength f
ys, produce yield strain ε
ys=f
ys/ E
s; And now the stress of composite material to be less than its yield strength (be f
c1=ε
yse
c<f
yc), it (is Δ that strain also not yet reaches its yield strain
c=ε
ys<ε
yc).When steel product stress reaches yield strength f
ysafter, steel can also produce very large plastic strain, and composite material is still in elastic stage.If it is ε that steel produce the strain of maximum plastic deformation, if the yield strain ε of composite material
ycmeet ε
ycthe condition of>=ε, establishing now composite material strength is f
c, the compression bearing f of this support
y=f
ys+ f
c.Yield strain ε when composite material
ysthe yield strength of=ε and composite material meets f
yc=f
ysthe time, the bearing capacity f of this support
y=2f
ys.
Therefore, the bearing capacity that can improve support is supported in power consumption of the present invention as seen through the above analysis, though the dissipation external energy changes the bitter ductility that supports, hysteresis loop is full, makes supporting member also not produce the flexing phenomenon when pressurized.
Kernel steel core of the present invention is wrapped up by composite material GFRP integral sealing, and the GFRP floor directly contacts with supporting the inner core stress unit, by composite constraining inner core stress unit dissipation external energy, makes to support and exempts from flexing, has improved the supporting capacity supported.Support and adopt vacuum to import disposal integral molding,, by composite material GFRP sealed envelope, there is not corrosion problems in whole support, supports the life-cycle maintenance cost low.Due to the GFRP high-strength light, this support alleviates greatly than traditional buckling restrained brace quality, is convenient to transportation, installation.And this support designability is strong, convenient formation, flexible design, volume production fast as required.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, and any variation of expecting without creative work or replacement, within all should being encompassed in protection scope of the present invention.
Claims (6)
1. exempt from flexing Low Yield Point Steel-composite material power consumption support for one kind, it is characterized in that, by peripheral composite constraining whole unit sealed envelope inner core stress unit, formed, described inner core stress unit is low-yield steel kernel steel core, peripheral composite constraining unit consists of contoured foam in GFRP pipe with ribbing and pipe, in pipe, the GFRP floor is uniformly distributed, kernel steel core and peripheral composite constraining unit adopt vacuum to import disposal integral molding, kernel steel core two ends connecting portion is provided with screw, at the two ends of kernel steel core, perpendicular GFRP stiffening rib is set respectively.
2. a kind of flexing Low Yield Point Steel-composite material power consumption support of exempting from as claimed in claim 1, is characterized in that, described kernel steel core adopts the 08F steel.
3. a kind of flexing Low Yield Point Steel-composite material power consumption support of exempting from as claimed in claim 1, is characterized in that, described kernel steel core is a word, cross or I shape kernel steel core.
4. a kind of flexing Low Yield Point Steel-composite material power consumption support of exempting from as claimed in claim 1, is characterized in that, the flow process of described vacuum guiding and forming technique is:
(1) prepare mould: should guarantee that in manufacturing process die edge reserves necessary space, be convenient to the laying of weather strip and pipeline, after the mould preparation, the reply mould is cleared up, is beaten demoulding wax or smeared demoulding water;
(2) make the kernel steel core;
(3) processing and fabricating polyurethane foam bar, exempting from flexing Low Yield Point Steel-composite material power consumption supports and usings GFRP rectangular tube with ribbing as constraint element, GFRP floor molding mode is by polyurethane foam bar outsourcing glass fabric, after resin imports, gets final product curing molding GFRP floor; The punching of should slotting of the polyurethane foam bar of well cutting, be convenient to the circulation of resin;
(4) by polyurethane foam bar parcel glass fabric;
(5) lay glass fabric and reach fixedly core; At first lay the bottom glass fabric in wood mould; Then, the steel core material and the foam core material that process are put into to wood mould in order; Finally, lay the skin glass cloth on mould;
(6) lay release cloth; Lay release cloth on test specimen, the effect of release cloth is that test specimen is convenient in demoulding.Should lay mozzle, flow-guiding cloth on release cloth, its effect is the circulation of being convenient to resin simultaneously, guarantees the quality that resin imports;
(7) vacuumize; After laying vacuum bag formation sealing system, clamp into pitch tube, whole system is vacuumized; The system Air is found time, and check the system tightness;
(8) import resin; After vacuumizing and reaching certain requirement, prepare resin; Allocate curing compound into by gel time; Insert in the resin prepared advancing the resin pipeline, according to the charging order, open successively clip, note the amount of resin, supplement in time in case of necessity;
(9) demoulding; After resin solidification, take out goods from mould.
5. a kind of flexing Low Yield Point Steel-composite material power consumption support of exempting from as claimed in claim 1, is characterized in that, described GFRP pipe with ribbing is for square or circular.
6. a kind of flexing Low Yield Point Steel-composite material power consumption support of exempting from as claimed in claim 1, is characterized in that, described contoured foam is polyurethane foam.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310414759.XA CN103437450B (en) | 2013-09-12 | 2013-09-12 | A kind of anti-buckling low yield point steel-composite energy dissipation brace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310414759.XA CN103437450B (en) | 2013-09-12 | 2013-09-12 | A kind of anti-buckling low yield point steel-composite energy dissipation brace |
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| Publication Number | Publication Date |
|---|---|
| CN103437450A true CN103437450A (en) | 2013-12-11 |
| CN103437450B CN103437450B (en) | 2016-08-17 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746767A (en) * | 2015-04-10 | 2015-07-01 | 南京工业大学 | Maintenance-free buckling-free steel-composite material energy-consuming support |
| CN108487496A (en) * | 2016-07-08 | 2018-09-04 | 张玉强 | Damping wall device and resilient element number of species determine method |
| CN110159046A (en) * | 2019-06-03 | 2019-08-23 | 上海核工程研究设计院有限公司 | A kind of buckling restrained brace structure for nuclear island steel construction damping |
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| US5168673A (en) * | 1991-01-17 | 1992-12-08 | Nemir David C | Method and apparatus for damping vibrations |
| CN101575884A (en) * | 2009-05-27 | 2009-11-11 | 清华大学 | Reinforced-fiber composite constraining anti-buckling energy-consumption steel timbering |
| CN201459947U (en) * | 2009-05-27 | 2010-05-12 | 清华大学 | Fiber reinforced composite material-restraining bending and energy consumption-preventing steel support |
| CN103216023A (en) * | 2013-04-19 | 2013-07-24 | 清华大学 | Fiberglass-reinforced plastics (FRP) section bar buckling-resisting supporting structure |
| CN103273663A (en) * | 2013-06-04 | 2013-09-04 | 南京工业大学 | Manufacturing method of maintenance-free steel-composite material buckling restrained brace |
-
2013
- 2013-09-12 CN CN201310414759.XA patent/CN103437450B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5168673A (en) * | 1991-01-17 | 1992-12-08 | Nemir David C | Method and apparatus for damping vibrations |
| CN101575884A (en) * | 2009-05-27 | 2009-11-11 | 清华大学 | Reinforced-fiber composite constraining anti-buckling energy-consumption steel timbering |
| CN201459947U (en) * | 2009-05-27 | 2010-05-12 | 清华大学 | Fiber reinforced composite material-restraining bending and energy consumption-preventing steel support |
| CN103216023A (en) * | 2013-04-19 | 2013-07-24 | 清华大学 | Fiberglass-reinforced plastics (FRP) section bar buckling-resisting supporting structure |
| CN103273663A (en) * | 2013-06-04 | 2013-09-04 | 南京工业大学 | Manufacturing method of maintenance-free steel-composite material buckling restrained brace |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746767A (en) * | 2015-04-10 | 2015-07-01 | 南京工业大学 | Maintenance-free buckling-free steel-composite material energy-consuming support |
| CN108487496A (en) * | 2016-07-08 | 2018-09-04 | 张玉强 | Damping wall device and resilient element number of species determine method |
| CN108487496B (en) * | 2016-07-08 | 2019-11-26 | 江苏来德福汽车部件有限公司 | Damping wall device and resilient element number of species determine method |
| CN110159046A (en) * | 2019-06-03 | 2019-08-23 | 上海核工程研究设计院有限公司 | A kind of buckling restrained brace structure for nuclear island steel construction damping |
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| CN103437450B (en) | 2016-08-17 |
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