CN104746799A - Steel, FRP and environment-friendly concrete combined column and building method thereof - Google Patents
Steel, FRP and environment-friendly concrete combined column and building method thereof Download PDFInfo
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- CN104746799A CN104746799A CN201510039262.3A CN201510039262A CN104746799A CN 104746799 A CN104746799 A CN 104746799A CN 201510039262 A CN201510039262 A CN 201510039262A CN 104746799 A CN104746799 A CN 104746799A
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Abstract
The invention discloses a steel, FRP (fiber reinforced plastic) and environment-friendly concrete combined column and a building method thereof. The combined column comprises at least one vertical section, and the vertical section comprises a square steel tube and a round FRP tube. The round FRP tube is arranged in the square steel tube, common concrete is placed between the square steel tube and the round FRP tube in a filling manner, and the round FRP tube is filled with environment-friendly concrete. According to the steel, FRP and environment-friendly concrete combined column, by using the advantages of light mass, high strength and good corrosion resistance of the FRP material, not only the cost can be reduced by adopting the sustainable development material, but also the characteristics of high bearing capacity, high ductility, light weight and the like of the combined column are ensured. Meanwhile, the square steel tube improves the rigidity and ductility of the combined column, improves the shock and impact resistance, and is favorable for node connection, the construction difficulty is reduced, so that the combined column becomes a low-cost and high-performance member, and can be used for engineering structures of high-rises, large-span bridges and the like, and high technical and economic benefits are obtained.
Description
Technical field
The present invention relates to building structure technology field, especially relate to the environmentally friendly concrete combination column of a kind of steel-FRP-and construction method thereof.
Background technology
Along with the continuous increase of building height and bridge span, coupled column receives the extensive concern of engineering field.At present, the main member of frame construction, super highrise building and Loads of Long-span Bridges has reinforced concrete post, steel core concrete column, composite steel tube coagulation to coagulate the column section types such as earth pillar, these coupled columns play respective advantage all in the structure, but are no lack of the place existing and improve.
Such as reinforced concrete post exist long in time limit, difficulty is large, inefficient shortcoming, and ordinary reinforced concrete post is also difficult to meet the requirement for bearing capacity in high axial compression ratio situation.For this reason, engineering has occurred steel core concrete column, and steel core concrete column progressively becomes the important composition component of Super High, large-span structure body, it takes full advantage of its feature such as high-bearing capacity and good ductility.But at larger axis under misalignment, the steel pipe of steel core concrete column is easily surrendered, and whole column section enters softening stress-displacement stage subsequently, and bearing capacity declines gradually.
For the above-mentioned shortcoming of steel core concrete column, FRP constraint concrete column obtains extensive research.The feature of FRP constraint concrete column is that its force-displacement curve is bilinearity, and namely after the surrender of cross section, bearing capacity continues to rise, and therefore this column section is provided with more superior supporting capacity.
But the final failure mode of FRP constraint concrete column is fragility, is unfavorable for antidetonation demand.Therefore, someone proposes the Novel pole cross section of FRP, steel pipe, concrete three kinds of combinations of materials, and its section form is inner circular steel pipe, the outside interlayer penetration concrete be wound around between FRP, FRP and round steel pipe.Although this column section is obtained for very large improvement in bearing capacity and ductility, in Practical Project construction, be unfavorable for that bean column node connects, constructional difficulties is larger.
How to improve the structure of Novel pole of FRP, steel pipe, Combined concrete, become the important topic that future architecture field is urgently to be resolved hurrily.
In addition, along with the construction of a large amount of new structure and the dismounting of traditional structure, deriving large quantities of building waste, therefore obtaining as how reduced costs the key that high-performance component also progressively becomes Sustainable Development in Future.
Summary of the invention
The present invention is intended at least solve the technical problem existed in prior art.For this reason; the present invention aims to provide the environmentally friendly concrete combination column of a kind of steel-FRP-; the environmentally friendly Combined concrete Column border node of this steel-FRP-connects easily; reduce engineering construction difficulty; and make use of the environmentally friendly concrete of rich reserves; can alleviate traditional resource exhaustion crisis, economic benefit is good.
Another object of the present invention is to provide a kind of above-mentioned steel-FRP-construction method of environmentally friendly concrete combination column.
According to the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention, comprise at least one vertical section, described vertical section comprises: square steel pipe, and the cross section of described square steel pipe is formed as square; Circle FRP pipe, the cross section of described round FRP pipe is formed as circular, and described round FRP pipe is located in described square steel pipe, is filled with ordinary concrete between described square steel pipe and described round FRP pipe, is filled with environmentally friendly concrete in described round FRP pipe.
According to the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention, this coupled column make use of FRP material high-strength light, advantage that anti-corrosive properties are good, have employed the inner stuffing of environmentally friendly concrete as circle FRP pipe, novel sustainable development material not only can be adopted cost-saving, and ensure that coupled column has high-bearing capacity, high ductility, the feature such as lightweight.Simultaneously, the square steel pipe of outer setting adds rigidity and the ductility of coupled column, improve antidetonation, impact resistance, be beneficial to node to connect, reduce difficulty of construction, thus make the environmentally friendly concrete combination column of steel-FRP-become the high-performance component of low cost, obtain higher technical economic benefit, can be used in the engineering structures such as Super High, Loads of Long-span Bridges.
Particularly, described vertical section is multiple, multiple described square steel pipe in the vertical direction superposition is arranged, multiple described round FRP pipe in the vertical direction superposition is arranged, the upper end of the described round FRP pipe of all the other each vertical sections of removing the top exceeds the upper end of corresponding described square steel pipe, and the lower end of the described square steel pipe of all the other each described vertical sections of removing bottom exceeds the lower end of corresponding described round FRP pipe.Thus, can ensure that coupled column is when multistage connects, the square steel pipe seam of each section of vertical section staggers with circle FRP tube seam, and the round FRP pipe for next section of vertical section is intertwined and connected and the welding of square steel pipe reserves certain construction space.
Advantageously, the described square steel pipe of each described vertical section and the geometric center of described round FRP pipe overlap.Thus, can ensure that overall structure is symmetrical, stable performance, and the center of gravity of the environmentally friendly concrete combination column of steel-FRP-is positioned at its geometric center place, facilitates the design of the engineering structures of the environmentally friendly concrete combination column application of steel-FRP-, calculating.
Alternatively, chamfering is provided with between the adjacent wall of described square steel pipe.Thus, be convenient to remove burr, improve overall appearance degree, and it be too concentrated at corner's stress of square steel pipe to avoid the environmentally friendly concrete combination column of steel-FRP-.In addition, when filling ordinary concrete, ordinary concrete is also easier to the corner filling square steel pipe, avoids producing space.
More specifically, described environmentally friendly concrete is regenerated aggregate concrete or building refuse concrete.Thus, not only facilitate urban construction, and be conducive to the problem solving offal treatment, limestone resource and effective use of energy sources, alleviate carrying capacity of environment, alleviate the crisis of traditional resource exhaustion, meanwhile, also reduce cost, improve economic benefit.
Alternatively, described square steel pipe is the pipe fitting being bent by hot rolled steel plate, be welded.Thus, square steel pipe handling ease, cost are not high.
According to the construction method of the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention, comprise the steps: S1: prefabricated square steel pipe and circle FRP pipe; S2: place vertical for described round FRP pipe, fill environmentally friendly concrete in described round FRP pipe; S3: be enclosed within by described square steel pipe outside described round FRP pipe, the height of described round FRP pipe is higher than described square steel pipe; S4: fill ordinary concrete toward between described round FRP pipe and described square steel pipe, assembled the vertical section of first paragraph; S5: the described round FRP pipe of vertical for second segment section is vertically located on the described round FRP pipe of the vertical section of described first paragraph, is wound around FRP cloth in the junction of two described round FRP pipes; S6: fill environmentally friendly concrete in the described round FRP pipe of the vertical section of described second segment; S7: the described square steel pipe of vertical for described second segment section is vertically located on the described square steel pipe of the vertical section of described first paragraph, welds in the junction of two described square steel pipes; S8: fill ordinary concrete toward between the described square steel pipe and described round FRP pipe of the vertical section of described second segment; S9; Repeat step S5 to S8 until the height of described coupled column reaches design requirement, wherein, the upper end of the described square steel pipe of the vertical section of final stage is concordant with the upper end of described round FRP pipe.
According to the construction method of the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention, exploitativeness is strong, and it is next cost-saving to make use of novel sustainable development material, and obtain high-performance component, the sustainable development for future architecture industry provides a kind of effective way.
Advantageously, the described square steel pipe of every section of described vertical section and the geometric center of described round FRP pipe overlap.
Particularly, in step S2 and S6, pour into described environmentally friendly concrete from the top of described round FRP pipe, after often pouring into 150mm, vibrate 30 seconds, afterwards the environmentally friendly concrete retrained by described round FRP pipe obtained is carried out maintenance.
Particularly, in step S4 and S8, pour into described ordinary concrete from the top of described square steel pipe, after often pouring into 150mm, vibrate 30 seconds, afterwards the coupled column obtained is carried out maintenance.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the cross section arrangement diagram of the environmentally friendly concrete combination column of steel-FRP-according to the embodiment of the present invention;
Fig. 2 is the partial schematic sectional view of single vertical section in the environmentally friendly concrete combination column of steel-FRP-according to the embodiment of the present invention;
Fig. 3 is structural representation when comprising multiple vertical section according to the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention;
Fig. 4 is the flow chart of the construction method of the environmentally friendly concrete combination column of steel-FRP-according to the embodiment of the present invention;
Fig. 5 is the work progress schematic diagram of the environmentally friendly concrete combination column of steel-FRP-according to the present invention's specific embodiment.
Reference numeral:
100: steel-FRP-environmentally friendly concrete combination column;
10: vertically section; 1: square steel pipe 1; 2: circle FRP pipe; 3: environmentally friendly concrete; 4: ordinary concrete; 5: square steel pipe seam; 6: circle FRP tube seam;
10a: the vertical section of first paragraph; 1a: the square steel pipe of the vertical section of first paragraph; 2a: the round FRP pipe of the vertical section of first paragraph;
10b: the vertical section of second segment; 1b: the square steel pipe of the vertical section of second segment; 2b: the round FRP pipe of the vertical section of second segment;
10last: the vertical section of final stage; 1last: the square steel pipe of the vertical section of final stage; 2last: the round FRP pipe of the vertical section of final stage;
200: beam.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " length ", " on ", D score, " vertically ", " level ", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", the orientation of the instruction such as " hoop " or position relationship be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
In describing the invention, unless otherwise clearly defined and limited, term " is connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; It can be mechanical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Describe according to the environmentally friendly concrete combination column 100 of the steel-FRP-of the embodiment of the present invention below with reference to Fig. 1-Fig. 3.
According to the environmentally friendly concrete combination column 100 of the steel-FRP-of the embodiment of the present invention, as depicted in figs. 1 and 2, comprise at least one vertical section 10, each vertical section 10 comprises: square steel pipe 1 and circle FRP pipe 2, the cross section of square steel pipe 1 is formed as square, and the cross section of circle FRP pipe 2 is formed as circular.Circle FRP pipe 2 is located in square steel pipe 1, is filled with ordinary concrete 4 between square steel pipe 1 and circle FRP pipe 2, is filled with environmentally friendly concrete 3 in circle FRP pipe 2.
That is, the environmentally friendly concrete combination column of steel-FRP-100 is formed by steel, FRP, environmentally friendly concrete and ordinary concrete four kinds of combinations of materials, and wherein, steel and FRP material are formed as body respectively and are enclosed within outside steel pipe on FRP pipe.The cross section of FRP pipe is for circular to form round FRP pipe 2, and circle FRP pipe 2 fills environmentally friendly concrete 3 as inner formword.The cross section of steel pipe is square to form square steel pipe 1, and ordinary concrete 4 is filled between square steel pipe 1 and circle FRP pipe 2.On the whole, the cross section of the environmentally friendly concrete combination column 100 of the steel-FRP-that the present invention provides is rectangular solid cross section, along coupled column radial direction and on direction from outside to inside, the combination layer of the environmentally friendly concrete combination column of steel-FRP-100 is followed successively by: square steel pipe 1, ordinary concrete 4, circle FRP pipe 2 and environmentally friendly concrete 3.Here, for convenience of description, in the following description, the radial direction of coupled column is direction shown in arrow O in Fig. 2, and the axis of coupled column is direction shown in arrow P in Fig. 2, and the hoop of coupled column is direction shown in arrow Q in figure, will repeat no more afterwards.
In an embodiment of the present invention, environmentally friendly concrete 3 mainly refers to the concrete produced by the regeneration of solid waste, namely environmentally friendly concrete 3 is that raw material is the regeneration concrete of discarded object at least partially, therefore, environmentally friendly concrete 3 is the building material of sustainable development.For the raw material sources comparatively horn of plenty of regeneration concrete, such as, in discarded concrete recycling aggregate or building waste etc., the concrete that this raw material is made is regenerated aggregate concrete or building refuse concrete.Certainly, the embodiment of the present invention is not limited thereto, and environmentally friendly concrete 3 also can utilize flyash equal industrial residue to make, and does not do concrete restriction here.
Ordinary concrete 4 is the traditional concrete for regeneration concrete.Human and material resources, the energy of raw material (as aggregate etc.) the collection consumption of ordinary concrete 4 are larger, cost is high, and bring the problem of traditional resource exhaustion, environment pollution, be therefore necessary to add environmentally friendly concrete 3 in the environmentally friendly concrete combination column of steel-FRP-100.
Along with the increase of plant-scale development and urban architecture reconstruction works, the generation of industrial residue, discarded concrete and building waste the like waste also Japanese TV play increases, a great problem be processed in order to urban development of this kind of discarded object.And discarded object is made environmentally friendly concrete 3; and in the environmentally friendly concrete combination column 100 of the steel-FRP-being used in the embodiment of the present invention; not only facilitate urban construction; and be conducive to the problem solving offal treatment, limestone resource and effective use of energy sources; alleviate carrying capacity of environment, alleviate the crisis of traditional resource exhaustion, simultaneously; also reduce cost, improve economic benefit.
There is the characteristic that intensity is low, ductility is good in environmentally friendly concrete 3, by justifying FRP pipe 2 overcoat and constraint environment friendly concrete 3, the characteristic of environmentally friendly concrete 3 in use can be maximized favourable factors and minimized unfavourable ones.
Specifically, FRP (Fiber Reinforced Plastics/ fibre-reinforced plastics) material is after being mixed according to a certain percentage with matrix material by fibrous material, through the extruding of special mould, drawing and the high-performance shaped material that formed.In embodiments of the present invention, circle FRP pipe 2 adopts Mechanical entanglement method to make on winding machine, during making, FRP cloth is arranged on creel, FRP cloth is unwinding on creel, through tension system, natural resin groove, Guide head, by little side board band, it moves back and forth and disturbs on the mandrel turned round (mould).Fiber disturbs angle and fiber alignment density degree is preset according to intensity, and by the ratio of mandrel (mould) rotating speed with dolly reciprocating speed, carrys out controling parameters exactly.After solidification, by the composite product demoulding disturbed, form circle FRP pipe 2.
The round FRP pipe 2 be made up of FRP material has that quality is light, hardness is large, mechanical strength advantages of higher, therefore after the round environmentally friendly type concrete 3 of FRP pipe 2 retrains, the ductility of coupled column can not only be strengthened, and structural strength and the bearing capacity of coupled column can be improved, and weaken the lateral pressure of environmentally friendly concrete 3 to outside square steel pipe 1, make it meet the use standard of constructional materials.
And the resistance to permeability of FRP material is strong, anti-corrosive properties good, when being doped with corrosive raw materials (as siliceous slag) in environmentally friendly concrete 3, circle FRP pipe 2 can prevent corrosive substance outer layers from permeating, avoid corroding square steel pipe 1, extend the application life of the environmentally friendly concrete combination column 100 of steel-FRP-.Also therefore, when environmentally friendly concrete 3 is produced, also without the need to removing the corrosive substance in raw material, the manufacturing cost of environmentally friendly concrete 3 is reduced.
And justifying the sheathed square steel pipe 1 of skin of FRP pipe 2, fill ordinary concrete 4 between square steel pipe 1 and circle FRP pipe 2, the structural strength of the environmentally friendly concrete combination column 100 of steel-FRP-can be improved, increase supporting capacity.And the setting of outer square steel pipe 1, improve rigidity, the energy dissipation capacity of the environmentally friendly concrete combination column 100 of steel-FRP-, change FRP constraint Brittleness of Concrete failure mode, be conducive to seismic design.Thus, the environmentally friendly concrete combination column 100 of steel-FRP-not only used the building material of sustainable development, and ensure that the excellent specific properties such as high-bearing capacity, high ductility, antidetonation are strong, lightweight, is applicable to the structure such as Super High, Loads of Long-span Bridges.
In addition, because the intensity of environmentally friendly concrete 3 is lower, poor-performing, therefore the internal layer of constraint environment friendly concrete 3 circle FRP pipe 2 is arranged to round tube, circular characteristic can be utilized, make the stress of each point on the hoop of circle FRP pipe 2 more even, overall performance is stablized, and shock resistance, shock resistance are improved.
And outer square steel pipe 1 is arranged to square tube, steel-FRP-environmentally friendly concrete combination column 100 monnolithic case is square column, be then convenient to node connect, and facilitates engineering construction.Here, node refers to the tie point of structural member, because the environmentally friendly concrete combination column 100 of steel-FRP-is square column, square column is carried out being connected being more prone to other structural members in engineering such as beam 200, body of wall, floor etc., and difficulty of construction reduces.
According to the environmentally friendly concrete combination column 100 of the steel-FRP-of the embodiment of the present invention, this coupled column make use of FRP material high-strength light, advantage that anti-corrosive properties are good, have employed the inner stuffing of environmentally friendly concrete 3 as circle FRP pipe 2, novel sustainable development material not only can be adopted cost-saving, and ensure that coupled column has high-bearing capacity, high ductility, the feature such as lightweight.Simultaneously, outer setting square steel pipe 1 adds rigidity and the ductility of coupled column, improve antidetonation, impact resistance, be beneficial to node to connect, reduce difficulty of construction, thus make the environmentally friendly concrete combination column 100 of steel-FRP-become the high-performance component of low cost, obtain higher technical economic benefit, can be used in the engineering structures such as Super High, Loads of Long-span Bridges.
Particularly, as shown in Figure 1-Figure 3, the square steel pipe 1 of each vertical section 10 and the geometric center of circle FRP pipe 2 overlap.Namely round FRP pipe 2 is arranged on the centre of square steel pipe 1 inside, ensure that steel-FRP-environmentally friendly concrete combination column 100 overall structure is symmetrical, stable performance, and the center of gravity of the environmentally friendly concrete combination column 100 of steel-FRP-is positioned at its geometric center place, facilitate the design of the engineering structures that the environmentally friendly concrete combination column 100 of steel-FRP-is applied, calculating.
Advantageously, justify the length of side of cross-sectional diameter close to the cross section of square steel pipe 1 of FRP pipe 2, alternatively, under the prerequisite that square steel pipe 1 size is certain, the caliber of design circle FRP pipe 2 large as far as possible, to improve the accounting of environmentally friendly concrete 3 as far as possible, reduce the cost of the environmentally friendly concrete combination column 100 of steel-FRP-.
Further, as shown in Figure 1, chamfering is provided with between the adjacent wall of square steel pipe 1.That is, four turnings of square steel pipe 1 are all provided with chamfering, thus, are convenient to remove burr, improve the overall appearance degree of the environmentally friendly concrete combination column 100 of steel-FRP-, and it is too concentrated at corner's stress of square steel pipe 1 to avoid the environmentally friendly concrete combination column of steel-FRP-100.In addition, when filling ordinary concrete 4, ordinary concrete 4 is also easier to the corner filling square steel pipe 1, avoids producing space.
Alternatively, square steel pipe 1 is the pipe fitting being bent by hot rolled steel plate, be welded.Wherein, hot rolled steel plate has good toughness and ductility, and thus, square steel pipe 1 handling ease, cost are not high.Certainly, when welding after hot rolled steel plate is bending, the quality of weld seam should meet welding standard.
Further alternatively, the two ends of square steel pipe 1, when prefabricated, are put down by lathe car, thus the planeness of the end face of guarantor's steel pipe 1, the simultaneously cross section of guarantor's steel pipe 1 and the verticality of short transverse.
Here, as shown in Figure 2, the environmentally friendly concrete combination column of steel-FRP-100 only can comprise a vertical section 10, when vertical section 10 is one, the axial length of the square steel pipe 1 in this vertical section 10 and circle FRP pipe 2 is equal, thus environmentally friendly concrete combination column 100 entirety of steel-FRP-forms a square column.Here, axial length refers to the length on the pipe fitting bearing of trend in Fig. 2 shown in arrow P, hereinafter will no longer describe.
Certainly, according to the needs of engineering construction, the environmentally friendly concrete combination column of steel-FRP-100 also can be divided into multiple vertical section 10.When vertical section 10 is multiple, multiple vertical section 10 vertically superposes setting, generates one by one from down to up during construction.
Particularly, as shown in Figure 3, multiple square steel pipe 1 in the vertical direction superposition is arranged, and multiple round FRP pipe 2 in the vertical direction also superposes setting.Connect for convenience of adjacent two vertical sections 10, the upper end of the round FRP pipe 2 of all the other each vertical sections 10 of removing the top exceeds the upper end of corresponding square steel pipe 1, and the lower end of the square steel pipe 1 of all the other each vertical sections 10 of removing bottom exceeds the lower end of corresponding circle FRP pipe 2.How this setup is convenient to the connection of adjacent two vertical sections 10, is described, repeats no more in the construction method carrying out the environmentally friendly concrete combination column of steel-FRP-below here.
Below with reference to Fig. 1-Fig. 5, the construction method according to the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention is described.
According to the construction method of the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention, as Figure 1-Figure 4, comprise the steps:
S1: prefabricated square steel pipe 1 and circle FRP pipe 2;
S2: vertically placed by circle FRP pipe 2, fills environmentally friendly concrete 3 in circle FRP pipe 2;
The height of S3: be enclosed within by square steel pipe 1 outside round FRP pipe 2, circle FRP pipe 2 is higher than square steel pipe 1;
S4: fill ordinary concrete 4 toward between circle FRP pipe 2 and square steel pipe 1, assemble the vertical section 10a of first paragraph (the round FRP pipe 2 as shown in Figure 3, related in step S2-S4 and square steel pipe 1 refer to round FRP pipe 2a and the square steel pipe 1a of the vertical section 10a of first paragraph);
S5: be vertically located on the round FRP pipe 2a of the vertical section 10a of first paragraph by the round FRP pipe 2b of vertical for second segment section 10b, is wound around FRP cloth in the junction (i.e. round FRP tube seam 6 place) of two round FRP pipes 2;
S6: fill environmentally friendly concrete 3 in the round FRP pipe 2b of the vertical section 10b of second segment;
S7: be vertically located at by the square steel pipe 1b of vertical for second segment section 10b on the square steel pipe 1a of the vertical section 10a of first paragraph, welds in the junction (i.e. square steel pipe seam 5 place) of two square steel pipes 1;
S8: fill ordinary concrete 4 toward between the square steel pipe 1b and circle FRP pipe 2b of the vertical section 10b of second segment;
S9; Repeat step S5 to S8 until the height of coupled column reaches design requirement, wherein, the upper end of the square steel pipe 1last of the vertical section 10last of final stage is concordant with the upper end of circle FRP pipe 2last.
It should be noted that; when the environmentally friendly concrete combination column 100 of steel-FRP-only includes one section of vertical section 10; as shown in Figure 2; this vertical section 10 is the vertical section of first paragraph; also be the vertical section of final stage; the axial length of the square steel pipe 1 used and circle FRP pipe 2 is equal; the lower end of square steel pipe 1 is concordant with the lower end of circle FRP pipe 2; the upper end of square steel pipe 1 is also concordant with the upper end of circle FRP pipe 2; in above-mentioned construction method; only need to implement the step from S1 to S4, this construction method is also in protection scope of the present invention.
When the environmentally friendly concrete combination column 100 of steel-FRP-comprises multiple vertical section 10, as shown in Figure 3, the axial length of the square steel pipe 1a that the vertical section 10a of first paragraph uses is less than the axial length of round FRP pipe 2a, afterwards except the vertical section 10last of final stage, in the vertical section 10 of each section, the upper end of its circle FRP pipe 2 exceeds the upper end of corresponding square steel pipe 1, and the lower end of its square steel pipe 1 exceeds the lower end of corresponding circle FRP pipe 2.Can ensure that coupled column is when multistage connects like this, the square steel pipe seam 5 of each section of vertical section 10 staggers with circle FRP tube seam 6, and the round FRP pipe 2 for next section of vertical section 10 is intertwined and connected and the welding of square steel pipe 1 reserves certain construction space.The axial length of the square steel pipe 1 that the vertical section 10last of final stage uses is greater than the axial length of round FRP pipe 2, to ensure that the upper end of the square steel pipe 1last of the vertical section 10last of final stage is concordant with the upper end of circle FRP pipe 2last.Here, concrete restriction is not done, as long as meet above-mentioned requirements to the axial length of the square steel pipe 1 in the vertical section 10 of mid portion and circle FRP pipe 2.
Particularly, in step S2 and S6, pour into environmentally friendly concrete 3 from the top of circle FRP pipe 2, after often pouring into 150mm, vibrate 30 seconds, afterwards the environmentally friendly concrete 3 retrained by circle FRP pipe 2 obtained is carried out maintenance according to concrete code.Here, 150mm refers to the vertical height that environmentally friendly concrete 3 pours into is 150mm.
Particularly, in step S4 and S8, pour into ordinary concrete 4 from the top of square steel pipe 1, after often pouring into 150mm, vibrate 30 seconds, afterwards the coupled column obtained is carried out maintenance according to concrete code.Here, 150mm refers to the vertical height that ordinary concrete 4 pours into is 150mm.
Advantageously, the square steel pipe 1 of every section of vertical section 10 and the geometric center of circle FRP pipe 2 overlap.
For ease of understanding, below in conjunction with the concrete example of shown in Fig. 5, the building course of the environmentally friendly concrete combination column 100 of steel-FRP-in construction works is described.In this construction works, the environmentally friendly concrete combination column 100 of steel-FRP-needs to be connected with beam 200.
First as shown in A to D in Fig. 5, build the vertical section 10a of first paragraph of the environmentally friendly concrete combination column of steel-FRP-100, when round FRP pipe 2a and the square steel pipe 1a of the vertical section 10a of prefabricated first paragraph, require that the axial length of square steel pipe 1a is less than the axial length of round FRP pipe 2a, thus square steel pipe seam 5 staggers with circle FRP tube seam 6 when ensureing that coupled column multistage connects, to be intertwined and connected for next section of circle FRP pipe 2 and square steel pipe 1 welding reserves certain construction space.
Particularly, as shown in A and B in Fig. 5, prefabricated one section of round FRP pipe 2a is vertically placed, at the construction field (site), prefabricated round FRP pipe 2a is filled environmentally friendly concrete 3 as inner formword.After environmentally friendly concrete 3 maintenance a period of time, as shown at c, square steel pipe 1 is enclosed within from top to bottom outside the environmentally friendly concrete column of FRP constraint, and requires that the geometric center of circle FRP pipe 2a and square steel pipe 1a overlaps.Then as shown atd, ordinary concrete 4 is poured into by between circle FRP pipe 2a and square steel pipe 1a.
In the construction works shown in Fig. 5, beam 200 is connected on the vertical section 10a of first paragraph, therefore as shown in E in Fig. 5, after the vertical section 10a of first paragraph has built, vertical for first paragraph section 10a is connected with beam 200, the process connected can adopt the construction method of beam-to-column joint disclosed in prior art, is not described specifically here.Then adopt lift-on/lift-off system by the round FRP pipe 2a concentric alignment of the round FRP pipe 2b of vertical for second segment section 10b and the vertical section 10a of first paragraph, and adopt the method for false twist's FRP cloth the round FRP tube seam 6 of the two end to be connected.
After two sections of round FRP pipes 2 have connected, as shown in F-H in Fig. 5, fill environmentally friendly concrete 3 in the round FRP pipe 2b of the vertical section 10b of second segment after, adopt lift-on/lift-off system to be enclosed within outside the environmentally friendly concrete column of FRP constraint by second segment square steel pipe 1b from top to bottom, and be welded to connect at seam 5 place of the square steel pipe with the vertical section 10a of first paragraph.Then, between the round FRP pipe 2b and square steel pipe 1b of the vertical section 10b of second segment, ordinary concrete 4 is poured into.
Afterwards successively circulation step E to step H, until reach construction design height.As shown in Figure 3, in the end in one section of vertical section 10last, square steel pipe 1last lengthens, and makes square steel pipe 1last elevation of top identical with circle FRP pipe 2last elevation of top.
To sum up, according to the construction method of the environmentally friendly concrete combination column of steel-FRP-of the embodiment of the present invention, exploitativeness is strong, and it is next cost-saving to make use of novel sustainable development material, and obtaining high-performance component, the sustainable development for future architecture industry provides a kind of effective way.
In the description of this manual, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. the environmentally friendly concrete combination column of steel-FRP-, is characterized in that, comprises at least one vertical section, and described vertical section comprises:
Square steel pipe, the cross section of described square steel pipe is formed as square;
Circle FRP pipe, the cross section of described round FRP pipe is formed as circular, and described round FRP pipe is located in described square steel pipe, is filled with ordinary concrete between described square steel pipe and described round FRP pipe, is filled with environmentally friendly concrete in described round FRP pipe.
2. the environmentally friendly concrete combination column of steel-FRP-according to claim 1, it is characterized in that, described vertical section is multiple, multiple described square steel pipe in the vertical direction superposition is arranged, multiple described round FRP pipe in the vertical direction superposition is arranged, the upper end of the described round FRP pipe of all the other each vertical sections of removing the top exceeds the upper end of corresponding described square steel pipe, and the lower end of the described square steel pipe of all the other each described vertical sections of removing bottom exceeds the lower end of corresponding described round FRP pipe.
3. the environmentally friendly concrete combination column of steel-FRP-according to claim 1, is characterized in that, the described square steel pipe of each described vertical section and the geometric center of described round FRP pipe overlap.
4. the environmentally friendly concrete combination column of steel-FRP-according to claim 1, is characterized in that, be provided with chamfering between the adjacent wall of described square steel pipe.
5. the environmentally friendly concrete combination column of steel-FRP-according to claim 1, is characterized in that, described environmentally friendly concrete is regenerated aggregate concrete or building refuse concrete.
6. the environmentally friendly concrete combination column of steel-FRP-according to claim 1, is characterized in that, described square steel pipe is the pipe fitting being bent by hot rolled steel plate, be welded.
7. a construction method for the environmentally friendly concrete combination column of steel-FRP-, is characterized in that, comprise the steps:
S1: prefabricated square steel pipe and circle FRP pipe;
S2: place vertical for described round FRP pipe, fill environmentally friendly concrete in described round FRP pipe;
S3: be enclosed within by described square steel pipe outside described round FRP pipe, the height of described round FRP pipe is higher than described square steel pipe;
S4: fill ordinary concrete toward between described round FRP pipe and described square steel pipe, assembled the vertical section of first paragraph;
S5: the described round FRP pipe of vertical for second segment section is vertically located on the described round FRP pipe of the vertical section of described first paragraph, is wound around FRP cloth in the junction of two described round FRP pipes;
S6: fill environmentally friendly concrete in the described round FRP pipe of the vertical section of described second segment;
S7: the described square steel pipe of vertical for described second segment section is vertically located on the described square steel pipe of the vertical section of described first paragraph, welds in the junction of two described square steel pipes;
S8: fill ordinary concrete toward between the described square steel pipe and described round FRP pipe of the vertical section of described second segment;
S9; Repeat step S5 to S8 until the height of described coupled column reaches design requirement, wherein, the upper end of the described square steel pipe of the vertical section of final stage is concordant with the upper end of described round FRP pipe.
8. the construction method of the environmentally friendly concrete combination column of steel-FRP-according to claim 7, is characterized in that, the described square steel pipe of every section of described vertical section and the geometric center of described round FRP pipe overlap.
9. the construction method of the environmentally friendly concrete combination column of steel-FRP-according to claim 7, it is characterized in that, in step S2 and S6, described environmentally friendly concrete is poured into from the top of described round FRP pipe, after often pouring into 150mm, vibrate 30 seconds, afterwards the environmentally friendly concrete retrained by described round FRP pipe obtained is carried out maintenance.
10. the construction method of the environmentally friendly concrete combination column of steel-FRP-according to claim 7, is characterized in that, in step S4 and S8, described ordinary concrete is poured into from the top of described square steel pipe, after often pouring into 150mm, vibrate 30 seconds, afterwards the coupled column obtained is carried out maintenance.
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| CN104746799B (en) | 2017-11-21 |
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