CN101525864B - Basalt fibre composite rib and basalt fibre composite inhaul cable - Google Patents
Basalt fibre composite rib and basalt fibre composite inhaul cable Download PDFInfo
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- CN101525864B CN101525864B CN2009100256712A CN200910025671A CN101525864B CN 101525864 B CN101525864 B CN 101525864B CN 2009100256712 A CN2009100256712 A CN 2009100256712A CN 200910025671 A CN200910025671 A CN 200910025671A CN 101525864 B CN101525864 B CN 101525864B
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Abstract
The invention discloses a basalt fibre composite rib and a basalt fibre composite inhaul cable. The composite rib is formed by drawing, extruding, molding and compounding basalt fibre and carbon fibre under the pretension action, and fibre volume ratio is 4:1-1:1; the basalt fibre composite inhaul cable comprises an outer protecting layer and fibre reinforcement material arranged in the outer protecting layer, the fibre reinforcement material comprises a center rib and an outer rib, the center rib is composed of a basalt fibre rib or carbon fibre rib, the outer rib is composed of the basalt fibre composite rib, an adhesive elastic filling layer and an inner sleeve are arranged between the center rib and the outer rib, the inner side of the inner sleeve is connected with the adhesive elastic filling layer, and the outer side of the inner sleeve is connected with the outer rib. In the composite inhaul cable, the carbon fibre content occupies 25-40 percent of total fibre content of the inhaul cable. Compared with the prior art, the composite carbon fibre of the basalt fibre composite inhaul cable in the basalt fibre enables short-period and long-period mechanical property and chemical property of the inhaul integer to be better, and has remarkable economy.
Description
Technical field
The drag-line that the present invention relates to a kind of fiber muscle and made by the fiber muscle belongs to the new construction material of association areas such as civil engineering traffic and the exploitation of form of structure.
Background technology
Fibre reinforced composites (Fiber Reinforced Polymer is called for short FRP) are the high performance materials by fibrous material and matrix material mix according to a certain percentage and the certain technology of process is compounded to form.This material came out in the forties in 20th century, originally was used for high-tech areas such as Aeronautics and Astronautics, national defence, was widely used in fields such as automobile, chemical industry, medical science gradually afterwards.In recent years,, lightweight high-strength, advantage such as corrosion-resistant with it, beginning is used widely in civil engineering structure, and is subjected to the extensive concern of engineering circle.
The FRP material is owing to possess many good characteristics such as high-strength light, corrosion-resistant, easy cutting, and through years of development, the strengthening reconstruction and the performance that have been widely used in civil engineering structure strengthen the field.The bearing capacity reinforcement and strengthening that comprises the beam column built from concrete plate, the anti-seismic performance improvement of concrete column etc.In recent years, the FRP material is just further developing as new structural material, is applied to various newly-built structures.As the suspension cable in the bridge, bridge deck, beam, FRP and concrete composite beam etc.Along with continuous popularization and maturation that FRP uses, the utilization ratio of FRP intensity is more and more abundant, and the FRP material that multiple fiber mixes mutually occurs, thereby makes that the advantage performance of fibrous material is more abundant.
For traditional Cable Structure, as cable stayed bridge, suspension bridge, rope arch structure etc., drag-line all adopts steel strand or steel tendon.Though steel have high strength, outstanding mechanical property such as high elastic modulus, also there are many hidden danger in himself, as not corrosion such as acid and alkali-resistance electricity, problem such as anti-fatigue performance is not strong, and it is bigger to conduct oneself with dignity.These hidden danger often play control action to the long-term behaviour of structure, jeopardize the safety of structure.As the suspension cable in the cable stayed bridge, because suspension cable is subjected to the effect of dynamic loading for a long time, vibration causes peeling off of protective material at stay cable end through regular meeting, thereby causes various corrosion, and is forced to change drag-line, causes very big economic loss.And for large span stayed-cable bridge, along with the increase of span, suspension cable constantly increases, because the also corresponding increase of sag that the cable wire deadweight causes, this causes the increase of drag-line selfweight stress on the one hand, reduces the drag-line service efficiency; On the other hand, sag increases the rigidity that also equivalence has reduced drag-line, is unfavorable for the Deformation control under the bridge user mode.These problems that face at drag-line in the cable stayed bridge, professor Meier in Swiss Confederation laboratory (EMPA) has at first proposed this to adopt the carbon fiber drag-line to replace the imagination of conventional steel drag-line, the carbon fiber drag-line is applied in many experiment bridges successively afterwards, span is many below 100m, and its corresponding theory research is simultaneously also being carried out.But, because carbon fiber lasting high price for many years,, certainly will roll up the cost of engineering, thereby the research of carbon fiber suspension cable and application the restriction and the restriction of real economy factor have been subjected to if adopt carbon fiber on a large scale.And the carbon fiber drag-line is easy to vibration more because quality own kicks the beam under wind and other dynamic loadings, and this also is a unfavorable factor.Simultaneously, the fragility problem also needs to be improved.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned the deficiencies in the prior art, and a kind of basalt fibre compound stay cable that has less sag effect, the compound muscle of corrosion-resistant, fatigue proof basalt fibre and have good economy and aerodynamic stability is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
The compound muscle of a kind of basalt fibre, described compound muscle is composited by resin matrix by some basalt fibres and carbon fiber, comprises compound single reinforcement and composite twisted wire.
Described composite fibre single reinforcement is by some basalt fibre silks and carbon fiber wire, under the pretension effect, be composited by pultrusion molding process and resin matrix, the compound volume ratio of described basalt fibre silk and carbon fiber wire is 4: 1～1: 1,, described resin matrix content is not less than 25% of compound single reinforcement volume.
Described composite twisted wire forms for being twisted with the fingers by compound single reinforcement strand.
A kind of basalt fibre compound stay cable that adopts the compound muscle of above-mentioned basalt fibre to make; comprise external protection and place its interior fiber muscle material; described fiber muscle material comprises center rib and outside muscle; between described center rib and outside muscle, be provided with viscoplasticity packed layer and inner sleeve; described inner sleeve is inboard to be connected with the viscoplasticity packed layer, and the outside of inner sleeve is connected with outside muscle.
In the described compound stay cable, carbon fiber content is at the 25-40% of drag-line overall fibre content.
Described outside muscle is that compound single reinforcement is formed; Described interior tendon is that basalt fibre single reinforcement or carbon fiber single reinforcement are formed.
Described outside muscle also can be formed for twisting with the fingers the composite twisted wire that forms by compound single reinforcement strand.
Described center rib also can be for being twisted with the fingers the basalt twisted wire that forms or being to twist with the fingers the carbon fiber twisted wire that forms by carbon fiber single reinforcement strand to form by basalt fibre single reinforcement strand.
A kind of high-performance basalt fibre of the present invention compound stay cable compared with prior art, the invention has the beneficial effects as follows:
1, basalt fibre compound stay cable of the present invention is compared with the conventional steel drag-line, has less sag effect, and is corrosion-resistant, advantages such as endurance and good air stability.
2, carbon fiber reinforce plastic in basalt fibre, make that the short-term of drag-line integral body and long-term mechanical property and chemical property are good, and have an outstanding economical characters, for cable stayed bridge to large span development more with obtain more that excellent comprehensive performances provides a kind of economical and practical selection.
3, compare with the carbon fiber drag-line, have the advantage of good economy and aerodynamic stability, and other quiet power mechanical properties are also approaching with the carbon fiber drag-line.
4, compare with the basalt fibre drag-line, have higher rigidity, littler sag effect and good endurance and aerodynamic stability.
5, drag-line of the present invention is two-layer inside and outside being divided into, and keeps a determining deviation between two-layer.The internal layer drag-line adopts basalt fibre single reinforcement (twisted wire) or carbon fiber single reinforcement (twisted wire), outer drag-line adopts compound single reinforcement or composite twisted wire, between ectonexine, fill viscoelastic material, the advantage of this method is promptly to guarantee the composite effect of two kinds of fibers, simultaneously again with two kinds of fiber relative separation, so that strengthen the internal damping of drag-line, reduce the vibratory response of dynamic loading downhaul and guarantee aerodynamic stability.
Description of drawings
Fig. 1 is basalt fibre and the glass fiber fatigue strength after with carbon fiber hybrid, wherein, and (a) fatigue strength behind glass fiber and the carbon fiber hybrid; (b) fatigue strength behind basalt fibre and the carbon fiber hybrid.
Fig. 2 is the strain-stress relation figure of steel, basalt fibre, carbon fiber and composite fibre.
Fig. 3 is the fiber strands form that adopts usually.
Fig. 4 is the structural representation of composite fibre muscle of the present invention, and wherein (a) is compound single reinforcement, (b) composite twisted wire.
Fig. 5 is a fiber single reinforcement schematic diagram of the present invention, (a) fiber single reinforcement wherein, (b) fiber strands.
The shape schematic diagram is arranged in Fig. 6 basalt compound stay cable of the present invention cross section.
Fig. 7 compound stay cable preparation flow signal of the present invention.
Wherein: 1, basalt fibre single reinforcement, 11, basalt fibre, 2, the carbon fiber single reinforcement, 21, carbon fiber; 3, compound single reinforcement, 4, inner sleeve, 5, the elastomeric material packed layer, 6, external protection; 7, basalt fibre twisted wire, 8, the carbon fiber twisted wire, 9, composite twisted wire, 10, matrix material.
The specific embodiment
Below to design concept of the present invention, the complex method of drag-line fiber muscle (twisted wire), the drag-line cross section is arranged and fiber muscle forming technology and drag-line are made flow process and be described.
1. mentality of designing
Problems at normally used steel cable (guy of twisted steel cable or steel tendon drag-line) existence: be subject to various soda acid galvano-cautery; Endurance life is not high; From great etc.And consider the practical problem that the present carbon fiber drag-line of studying exists: cost an arm and a leg, it is low to show fragility and shear strength, and aerodynamic stability is relatively poor etc.The present invention utilizes the various aspects of performance equilibrium, the exsertile basalt fibre of economy is as the drag-line material of main part, solve the restriction that fibrous material involves great expense and can't widely apply, adopt the insufficient rigidity and the endurance of the carbon fiber drag-line raising basalt fibre drag-line of part simultaneously, the inadequate problem of creep strength, and by the position of preferred arrangement carbon fiber drag-line and basalt drag-line, improve drag-line self damping, help reducing the dynamic response under the dynamic loading.And when considering some ultimate limit state, the big limiting strain of basalt fibre drag-line helps improving structure ductility, has increased the safety stock of structure.
The drag-line material of main part is selected basalt fibre for use, and do not adopt glass fiber, because the endurance of glass fiber, creep strength are low excessively, and and carbon fiber hybrid, also can not get significantly improving effect (seeing Fig. 1 (a)), glass fiber also exists and recycles difficulty simultaneously, and removal process has pollution, problems such as corrosion resistance difference are so be not suitable as the material of main part of drag-line.Should not adopt the composite material of aramid fiber in the design as basalt fibre, because the aramid fiber modulus of elasticity is low than carbon fiber, be in equal level with the modulus of elasticity of basalt fibre, raising does not have help to the compound stay cable modulus, and also there is antifatigue in aramid fiber, creep strength is low, to chemical actions such as ultraviolet ray, water, acid problem such as sensitivity relatively, so be not suitable as the composite material of this basalt fibre rope.Thereby the present invention adopts basalt fibre as the drag-line main body, and compound a certain amount of carbon fiber reaches and satisfies the required excellent comprehensive performance of high-performance drag-line.
The load-deformation curve that steel cable, carbon fiber drag-line, basalt fibre drag-line and basalt fiber and carbon fiber mix drag-line as shown in Figure 2.As seen, though itself also possesses advantages of higher tensile strength the basalt fibre drag-line, but its modulus of elasticity is lower, if satisfy the rigidity requirement of structure, certainly will increase a lot by the drag-line area, the drag-line internal stress is also very low, and this will cause the drag-line utilization ratio low, problem such as the obvious and aerodynamic effects of sag is obvious.Thereby consider to adopt part carbon fiber drag-line to mix, under the condition that satisfies rigidity requirement, improve the integral, flexible modulus in right amount.The volume ratio of carbon fiber drag-line in mixing drag-line is 20%-50%, and the modulus of elasticity (disregarding matrix material) that obtains drag-line after mixing is between 119GPa-161GPa.
By mixing, the significantly raising that the endurance life of basalt fibre itself also obtains is shown in Fig. 1 (b) (transverse axis is the logarithm (Log) of CYCLIC LOADING number of times, and vertical pivot is the ratio of maximum cyclic stress and Tensile strength).After basalt fibre and carbon fiber mixed by 1: 1, its fatigue strength increase substantially and carbon fiber approaching, enough satisfy the requirement of fatigue loading.
2. fiber muscle
Striding the drag-line of cable stayed bridge greatly is made up of parallel wire unit and parallel steel stranded wire usually.The present invention also with reference to these two kinds of forms, is used for composite fibre single reinforcement or twisted wire.General carbon fibre bar or twisted wire can adopt production method as shown in Figure 3, as single direct pultrusion, form the single fiber muscle that diameter 5-11mm does not wait according to the design needs.Also can on the basis of single fiber muscle, twist with the fingers the formation fiber strands by strand, can be in a branch of strand muscle by 7,19,37 or more single fiber muscle composition, as shown in Figure 3.
With reference to fiber muscle commonly used at present, compound stay cable of the present invention adopts following two kinds of fiber muscle forms (the matrix material volume content is not less than 25% in the fiber muscle):
(1) compound single reinforcement (twisted wire)
Basalt fibre silk and carbon fiber wire are needed by design, combination (4: 1～1: 1) in certain proportion, for guaranteeing two kinds of filametntary co-operation, fibre is at first carried out pre-stretch-draw, and then pass through pultrusion molding process, be combined into single composite fibre muscle (compound single reinforcement), shown in Fig. 4 (a).Compound single reinforcement can use separately, also many compound single reinforcements can be twisted with the fingers by strand and be formed the composite twisted wire use, twists with the fingers (Fig. 4 (b)) as 7 compound single reinforcement strands.
(2) fiber single reinforcement (strand muscle)
Basalt fibre silk and carbon fiber wire form single fiber muscle (fiber single reinforcement) by pultrusion respectively, shown in Fig. 5 (a), the fiber single reinforcement can independently use, and also many single reinforcement strands can be twisted with the fingers and form the fiber strands use, twists with the fingers (Fig. 5 (b)) as 7 fiber single reinforcements strands.
3. compound stay cable cross section arrangement form
By the fiber muscle that above-mentioned two various methodologies form, arrange shape composite fibre drag-line by following rule.Specific as follows:
Drag-line is divided into inside and outside two-layer, and keeps a determining deviation between two-layer.The internal layer center rib adopts basalt fibre single reinforcement (twisted wire) or carbon fiber single reinforcement (twisted wire), and outer outside muscle adopts compound single reinforcement or compound strand muscle, fills viscoelastic material between ectonexine, specifically as shown in Figure 6.In the compound stay cable, carbon fiber content accounts for the 25-40% of drag-line overall fibre content.The advantage of this method is promptly to guarantee the composite effect of two kinds of fibers, simultaneously again with two kinds of fiber relative separation, so that strengthen the internal damping of drag-line, reduces the vibratory response of dynamic loading downhaul and guarantees aerodynamic stability.
4. the thin portion of compound stay cable requirement
According to above-mentioned drag-line section form, the specific requirement of following thin portion is arranged:
1) external protection
External protection adopts the polythene PE material, is wrapped in composite fibre drag-line surface by thermoplastic processing, and concrete technology is identical with the ordinary steel drag-line, but needn't consider corrosion protection design.Only play the effect that the protection fiber directly is subjected to effect such as soda acid salt and forms drag-line surface given shape.
2) intermediate layer viscoplasticity packing material
The intermediate layer is viscoelastic material (as rubber etc.), is filled between internal layer drag-line and the outer drag-line.It act as: when inhaul cable vibration, because the relative motion of inside and outside drag-line makes the viscoelastic material distortion with power consumption, reduce vibratory response and improve aerodynamic stability.The specific requirement viscoelastic material has certain rigidity and viscous damping.
3) inner sleeve
The effect of inner sleeve is to keep outer layer fiber drag-line shape, is convenient to fill viscoelastic material simultaneously.Can adopt the fibrous material of various good economy performance to make the thin-walled tubular,, get final product so design the time only considers to bear the pressure that the viscoelastic material distortion causes because inner sleeve is not participated in the drag-line tension directly.
5. compound stay cable manufacture craft
At first, compound single reinforcement or fiber single reinforcement all adopt pultrusion molding process, for guaranteeing the co-operation of fiber, should give certain pretension to fibre, and then form fiber muscle material by pultrusion.This technology finally forms the finished fiber muscle by fibre untwisted rove being carried out series of process such as preimpregnation, heating, sclerosis, cooling and drawing.The manufacture craft process is: under the effect of former tractive force, fibre is applied pretension, fibre untwisted rove after matrix material (as epoxy resin etc.) pre-preg by the mold system preform, after solidifying through HTHP then, enter the sclerosis cooling stage, form final continuous fiber muscle by more small-bore mould drawing at last.The fiber muscle can be twisted with the fingers technology by strand and form fiber strands.Fiber muscle or fiber strands that preparation is finished form compound stay cable by operation shown in Figure 7.
Claims (3)
1. compound muscle of basalt fibre, it is characterized in that: described compound muscle is composited by resin matrix by some basalt fibres and carbon fiber, comprises compound single reinforcement and composite twisted wire; Described compound single reinforcement is by some basalt fibre silks and carbon fiber wire, under the pretension effect, be composited by pultrusion molding process and resin matrix, the compound volume ratio of described basalt fibre silk and carbon fiber wire is 4: 1～1: 1, and described resin matrix content is not less than 25% of compound single reinforcement volume.
2. basalt fibre compound stay cable that adopts the compound muscle of the described basalt fibre of claim 1 to make, it is characterized in that: comprise external protection and place its interior fiber muscle material, described fiber muscle material comprises center rib and outside muscle, and described outside muscle is made up of the compound muscle of basalt fibre; Described center rib is made up of basalt fibre single reinforcement or carbon fiber single reinforcement, between described center rib and outside muscle, be provided with viscoplasticity packed layer and inner sleeve, described inner sleeve is inboard to be connected with the viscoplasticity packed layer, and the outside of inner sleeve is connected with outside muscle.
3. basalt fibre compound stay cable according to claim 2 is characterized in that: in the described compound stay cable, carbon fiber content is at the 25-40% of drag-line overall fibre content.
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| CN101838885B (en) * | 2010-05-10 | 2011-09-21 | 泰安鲁普耐特塑料有限公司 | Method for producing basalt fiber rope net |
| CN101886347B (en) * | 2010-07-09 | 2012-10-17 | 金文成 | Fiber prestress rope containing high-toughness wear-resistant sleeve and fabricating method thereof |
| RU2455436C1 (en) * | 2010-12-15 | 2012-07-10 | Христофор Авдеевич Джантимиров | Reinforcement element for prestressed concrete structures |
| CN103497524A (en) * | 2013-07-27 | 2014-01-08 | 国家电网公司 | Composite rib made of basalt fiber and preparation method thereof |
| CN104060536A (en) * | 2014-06-06 | 2014-09-24 | 四川航天五源复合材料有限公司 | Basalt fiber composite reinforcement |
| CN104060538B (en) * | 2014-06-06 | 2015-12-30 | 四川航天五源复合材料有限公司 | A kind of compound stay cable containing continuous basalt fiber |
| CN104060537B (en) * | 2014-06-06 | 2016-01-06 | 四川航天五源复合材料有限公司 | Basalt fibre compound stay cable |
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| CN107165048A (en) * | 2017-05-16 | 2017-09-15 | 同济大学 | Damp type drag-line |
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| CN113684703A (en) * | 2020-05-16 | 2021-11-23 | 四川炬原玄武岩纤维科技有限公司 | Preparation method of basalt fiber composite rib and composite inhaul cable |
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Address after: 210096 Jiangsu city Nanjing Province four pailou No. 2 Patentee after: SOUTHEAST University Patentee after: ZHEJIANG GBF BASALT FIBER CO.,LTD. Patentee after: BEIJING TEXIDA RESEARCH&DEVELOPMENT OF TECHNOLOGY Co.,Ltd. Address before: 210096 Jiangsu city Nanjing Province four pailou No. 2 Patentee before: Southeast University Patentee before: ZHEJIANG GBF BASALT FIBER Co.,Ltd. Patentee before: BEIJING TEXIDA RESEARCH&DEVELOPMENT OF TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20221207 Address after: 210096 No. four archway, 2, Jiangsu, Nanjing Patentee after: SOUTHEAST University Patentee after: ZHEJIANG GBF BASALT FIBER CO.,LTD. Patentee after: BEIJING TEXIDA TRANSPORTATION FACILITIES CONSULTANTS CO.,LTD. Address before: 210096 No. four archway, 2, Jiangsu, Nanjing Patentee before: SOUTHEAST University Patentee before: ZHEJIANG GBF BASALT FIBER CO.,LTD. Patentee before: BEIJING TEXIDA RESEARCH&DEVELOPMENT OF TECHNOLOGY Co.,Ltd. |