CN109689990A - The C-shaped section and compound floor support plate that composite steel-concrete column system cold forming plate is formed - Google Patents

Abstract

This application involves a kind of reinforced columns, and according to NSR-10 standard and ACI-318 standard, reinforced column belongs to armored concrete classification.Its annular channel is by having constituting for cold-reduced sheet (CR) that forms C-shaped section, including a core (1) and at least one piece of backing plate (2), backing plate is inserted into column body space, touch concrete (4), the backing plate (2) includes a series of perforation (3) along its length, concrete is passed through from hole, after concrete setting, then form the combined column of work compound, enhance the quality of steel and concrete, the thickness of plate is reduced, so that product obtains economic feasibility.In addition, the present invention relates to the compound floor support plates for including these C-shaped sections and the concrete core being limited in annular channel inner space.

Description

The C-shaped section and compound building that composite steel-concrete column system cold forming plate is formed Board

Technical field

This application involves a kind of reinforced columns, according to NSR-10 standard and ACI-318 standard, reinforced column category In armored concrete classification.In the category, pipe fitting by cold-reduced sheet (CR) section constitution, the section and inner core and at least one to The inclined backing plate in column interior space constitutes floor support plate, is constantly contacted with concrete.The backing plate includes a series of perforation, can To allow concrete to pass through from hole, thus, after concrete setting, then the combined column of work compound is formed, enhances steel With the quality of concrete, the thickness of plate is reduced, so that product obtains economic feasibility.Floor support plate of the invention is preferably " L ", " C ", " u "-shaped opening floor support plate.In addition, being based on above-mentioned cylinder, whole and constructive structural system also belongs to the application's A part.

Background technique

In building field, concrete column and steel structure column are that masses are known, and steel structure column has many advantages, can conclude such as Under:

A) because of the attribute of material: steel, mathematical analysis model more representative of true model,

B) because manufacturing the industrial property with assembling process, speed of application is higher,

C) it can achieve high quality level using materials, final finisheds such as concrete due to the above reasons,

D) the significant reduction of construction weight, it means that it is influenced to reduce by the seismic events inertia effect,

E) belong to due to the above reasons, solution of laying foundation as a result, the landing load of structure is lower,

F) material 100% is recyclable.

Although economic globalization, although performance is preferably, especially insufficient in development of iron & steel industry such as Colombia Country, being widely used for steel column are still within initial stage.One of the reason of causing this phenomenon is cost.

A kind of alternative solution for being widely known and applying is to build reinforced column and steel column, this scheme is substantially Maintain the identical working procedure since beginning to use at the end of the 19th century:

A) preliminary cast iron process: hardened system is elaborated, moulds and is assembled,

B) carpenter's process: assembly, adjustment and the messenger wire of template,

C) concreting process: aloft work system prepares, and concrete pouring and stirring,

D) wait sufficiently solidification, carry out removing and

E) it removes.

Other than no significant improvement, same process is almost kept over more than 100 years, remains two kinds of handicrafts The activity of matter: timber or metal carpenter and ironsmith's process, these processes have the characteristics that uniqueness: labour puts into high, mistake wind Danger is higher, and the construction time is longer, therefore, causes direct cost and management cost higher.

Now, in structure, the component required with stress or bending is more effective in steel profile.And for compression or it is curved Really not so, the as shown in Figure 1 I type section of the requirement of song compression, conventional section (typical steel column section) are easier to be turned round The influence of rotexion Qu Xianxiang, which has limited the anti-compression properties of steel, and for rectangle or circular cross-section (typical reinforced concrete Earth pillar section) this limitation is then not present.In addition, concrete anti-compression is functional, cost is relatively low.Above content decision, for Cylinder usually requires that reinforced column usually than applying the cost of steel column lower at present.

On the other hand, it from the perspective of structure and function, observes, it is necessary to add concrete sheath coat for reinforcing bar, such as NSR-10 standard is C.1.7.7.1 described in chapter, and coating layer thickness cannot be less than 40 millimeters, and basic function is to protect reinforcing bar from corruption Erosion, also, deflagration event can be prevented eventually as heat insulator in a short time.

As the supplement of this concrete sheath coat function, NSR-10 standard: C.10.8.2, C.10.8.3, C.10.8.4: Wherein state in one section: " C.10.8.2, C.10.8.3, basic ideas C.10.8.4 are to design the cylinder of an appropriate size, To bear increased load, concrete simply then is added in design portion, reinforces, complies with without increasing C.10.9.1 the minimum proportional region required.Additional concrete is not subject to load." for the square column of 250 millimeters of side, it is minimum Coat side: 40 millimeters, the 54% of Zhan Zhuzi total cross section.The more than half part of total cross section does not have resistance to compression.

It, can be by effective resistance to compression knot of the compression performance in concrete " complete " section and steel to find such a option It closes, but is also able to maintain the rapid construction advantage of steel building system, template process needed for eliminating reinforced column, production Combined column out, and analysis and procedural model has been determined, and systematization, such as AISC-LRFD have been carried out in building standard, it uses In the use for needing concrete core pipe or compound cross-section core pipe using template, such as cylinder shown in Fig. 1, the cylinder are to work as One example of preceding technology.

Specified in ACI-318 standard and Colombia's NSR-10 standard and nearly all international standard, with industrial work Sequence replaces the alternative solution of carpenter and cast iron process, belongs to combined column type, and inside it, cylinder inner core is concrete.At this In alternative solution, template is made of pipe fitting, can be realized the function of reinforcing, thus, above two technique process can close two and be One, main component are as follows: industrial production pipe fitting.

Compound cross-section is made described below in C10.13.1 chapter in NSR-10 standard: " ... compressed composite wood Material must include all using the element of structure steel profile longitudinal reinforcement and the pipeline or pipe of with or without longitudinal reinforcement Son." obviously refer to closed continuous section.Subsequent CR10.13.2 chapter regulation: it " is counted using load-torque interaction The same rule for calculating reinforced concrete section resistance can be applied to compound cross-section.The interaction of concrete filled tube (compound cross-section) Scheme identical as ACI DesignHandbook ... .. ".CR.10.13.3 and CR.10.13.4 chapter defines core concrete and steel Stress transfer system between pipe is as follows: " ... future transmitting steel and concrete between stress, be laid with concrete it Before, can be directly connected to by protrusion, sinker or the reinforcing bar being welded on profile or structure pipe fitting ... ", C.10.13.6.1 chapter defines minimum thickness value and calculation equation, and first equation is for rectangular or square section It calculates, second equation is used for the calculating of circular cross-section.

In these equations, variable e: length side minimum thickness；B or diameter: D, fy: the yield strength of steel, Es: steel Elasticity modulus.Thus, for example, the square-section for being 250 millimeters for minimum indicating length, utilizes equation fy=413 megapascal And Es=200,000 megapascal, the minimum thickness of wall are about 6.55 millimeters.

Above-mentioned standard constitutes the basis of compound cross-section column application, it is clear that compound cross-section is serious in current development level Their application is limited, economic cause is as follows:

C10.13.1 chapter provides: " ... with or without the pipeline or pipe ... .. of reinforcing bar " refer to structure pipe fitting, wall thickness Equal to or more than 6 millimeters.As the alternative of reinforcing bar, being only equipped with structure pipe fitting leads to serious Economic Inferior Position.Structure pipe fitting Unit Weight cost be more than reinforcing bar cost 40%.Reduce the cost that cannot make its cost and application reinforcing bar using cast iron process Maintain an equal level.

In addition to the conditions already mentioned, the yield strength of reinforcing bar is greater than the yield strength of structure pipe profile, thus, with reinforcing bar phase Than more heavy in section structure pipe fitting being needed, therefore the consumption of structured steel pipe is higher, so its unit price is higher than reinforcing bar unit price.

Equally, stress transfer figure: " ... pass through protrusion, sinker or the steel being welded on profile or structure pipe fitting Muscle ... .. " means that this component of compound cross-section needs extra cost.

Other than above-mentioned cost, it is also necessary to carry out protection processing to surface, prevent from corroding.Stabilization as structural system The element of property needs to carry out high performance surface protection for " reinforcing " tubing string or cylinder pipe fitting, to guarantee that it makes Use the service life.

Although the seventies are ground by CIDECT (International pipe development and research committee) what Spain carried out Study carefully and show that the pipe fitting of Concrete Filled can be up to the fire that resistance temperature is about 600 DEG C in 90 minutes, it is desired nonetheless to protect Pipe fitting is reinforced, deflagration event is prevented.

Other than economic problems, the use of such cylinder worldwide is still limited to very much, because this Kind compound cross-section system cannot effectively work, that is to say, that the stress transfer between two components: concrete and steel pipe fitting are embedding Enter formula steel profile, in order to make section have plyability and cooperate, and there is no high efficiency as the result is shown, because working as coagulation After soil solidification, since the characteristic of chemical reaction eliminates two for from the surface shrinkage of pipe fitting inner wall or insertion profile and separation Direct contact between component.In fact, the compression strength of concrete is ignored, and the solution does not have business efficiency.

As the alternative solution for guaranteeing to cooperate, AISC standard regulation in 2010 is using shearing connector, to ensure to mix Stress transfer between solidifying soil and steel pipe fitting or insertion profile.On this problem, AISC-360-10¹Standard provides " for passing The distribution of lengths that the steel anchoring piece of longitudinal cut stress must be introduced along load is passed, which is no more than embedded in load biography Twice for passing the minimum lateral area on or below area.It should be at least in the anchor of the two sides of steel application transmitting longitudinal cut stress Firmware, setting should substantially with steel product cross-sectional axial symmetry.Inside and outside in the length for introducing load, the spacing of steel anchoring piece should expire The requirement of sufficient I 8.3e section."

In addition to the above, related " filled composite component ", AISC-360-10 standard regulation: " if desired, for passing The steel anchoring piece for passing longitudinal cut stress must be distributed in the length range that load introduces, and the length is no more than rectangle steel structure Twice of part minimum lateral area, or twice no more than round steel member diameters.The spacing of steel anchoring piece should meet I 8.3e The requirement of section."

In cylinder production process, above-mentioned parameter will bring higher cost, and wherein the application cost of pipe fitting profile is very Height causes the solution to lose competitiveness.

In the relevant document of this cylinder, there is the patent application JPH03144047 of KAWASAKI STEEL CO, wherein Shen A kind of please combined column patent, can improve the stress transfer between beam and column, supporting beam is welded on square steel tube, in steel pipe Fill concrete.The system is made of square-section metal tube (11), and the welded grider support (12) on the metal tube.Pass through gold The pole (14) for belonging to pipe surface is metal tube (11) fill concrete (15).After concrete (15) solidification, pole is blocked (14).In this way, the pulling force being applied on supporting element (12) can be dispersed, avoid the deformation of steel pipe (11) side beyond drawing range. Beam supporting element (12) is connected to the other parts of pipe fitting by bolt.

Another document for being related to composite system is KR20120099822 patent application document, and this document is related to reinforced concrete The method of the prefabricated steel column of soil, wherein using L shape and open steel, this method significant reduction construction time, PSRC column can be formed Panel zone, to offset the error of perpendicularity.In a preferred form of the invention, four are vertically laid in the corner of rectangular cross section A L shape steel (11).Auxiliary bar (12) are added in gap between L shape steel, are around surround by pull rod (13).By steel plate (15) It is welded to the outside of L shape steel profile and auxiliary bar.

It has in the prior art included by ACESCO²The compound column technology declared, which discloses opens made of steel plate The combined column that shape of the mouth as one speaks material is constituted, CR or HR type, especially " C " shape are distributed with C-shaped along section seam, form insertion concrete Pipe fitting section.Although these cylinders are the substitutes of steel column and concrete column, the interaction between them is insufficient to allow Cylinder plays a role as a kind of composite component of collaborative work.

Equally, GERDAU CORSA³Provide such a cylinder, the design of structural member by with armored concrete element Or the steel that coating or armored concrete filler cooperate are constituted.In particular to arrive the combined column made of steel profile, It using profile or plate rolling, is fixed by bolts or welds, or using the tubing or component of rectangle hollow steel cross section, use Armored concrete submerges, or filling armored concrete, also, reinforcing bar binding beam or lateral column inner core are open, i.e. " joist (joist) ", this beam is steel, is submerged using armored concrete, or support slab, is connected with each other, so that two kinds Material cooperates.

It is identical as ACESCO, GERDAU CORSA, it is related to the combined column with steel plate peripheral system, CR or HR type passes through 70XX type is welded to connect, and along weld seam with the distribution of " C " shape, every 250 millimeters have 50 millimeters of welding interval lines, forms one by mixing The inner space of solidifying soil filling.

Although there are the combined column of different type steel, including some with similar cylinder of the invention, such as ACESCO and GERDAU CORSA, according to the current standard of this class compound cross-section: the rule of NSR-10:CR.10.13.3 chapter and CR.10.13.4 chapter Fixed, all pipe fittings and inner core are the cylinder needs of concrete in its inner wall welding additives.

Therefore, in the prior art, it is still desirable to which a kind of compound column system, steel and concrete cooperate, effectively Transmit the stress between two components: concrete and pipe fitting or steel profile realize enough contacts, can interact, keep its right The endurance and steel of concrete compressing force can cooperate to the endurance of stress, keep the rapid construction of steel structures coating Advantage, and there is economic feasibility.

In short, the composite system being embedded in the form of I is very expensive, and round or square structure needs application along cylinder The shearing connector of distribution.Therefore, existing system

Infeasible, because the minimum thickness of combined column should be 4.8 millimeters, this will increase cost, more more expensive than reinforcing bar.

External steel need to carry out the processing of steel, to prevent from corroding, such as using resin or other expensive materials.No It is expensive because providing that the thickness of plate is very thick according to standard using zinc-plated.For cylinder described herein as, Ke Yiyun Perhaps the plate thickness using zinc-plated steel or stainless steel is reduced.

In addition, for these cylinders, need to weld to connect bolt, or increases it and construct material requested and time Plan.

Detailed description of the invention

Fig. 1 shows the example of the existing combined column of the technology, comprising having steel profile of different shapes, H-shaped, circle Or rectangle, inner space are filled with concrete.

Fig. 2A is shown according to the application, the cross section of L shape floor support plate.

Fig. 2 B. is shown according to the application, the cross section of C-shaped floor support plate.

Fig. 2 C. is shown according to the application, the cross section of U-shaped floor support plate.

Fig. 3 A. is shown according to the application, the side view of L shape floor support plate.

Fig. 3 B. is shown according to the application, the side view of C-shaped floor support plate.

Fig. 3 C. is shown according to the application, the side view of U-shaped floor support plate.

Fig. 4 A. shows the top view of column of the present invention, by four L shape floor support plates (1A) and four C-shaped floor support plate (1B) groups At herein, the backing plate of component A and B have connected, and inner space is filled with concrete.

Fig. 4 B. shows the top view of column of the invention, is made of four U-shaped floor support plates (1C), herein, component A's and B Flange has connected, and inner space is filled with concrete.

Fig. 5 A. shows the top view of column of the invention, by four L shape floor support plates (1A) and four C-shaped floor support plates (1B) Composition, here is shown the sections of concrete-bridge, pass through the perforation of floor support plate backing plate.

Fig. 5 B. shows the top view of column of the invention, is made of four U-shaped floor support plates (1C), here is shown coagulations The section of native bridge passes through the perforation of floor support plate backing plate.

Fig. 6 shows the schematic diagram done experiment and photo of concrete core.

Fig. 7 shows the joint detail between cooperation set lining and a pedestal.

Fig. 8 shows the joint detail between cooperation set lining and a crossbeam.

Fig. 9 is in STAAD.Pro V8i program, using finite element method analysis, to simulate the feature of floor support plate one side, and It is limited inside concrete core.The boundary condition of node is depending on the freedom of motion of Z axis, corresponding to the vertical displacement of cylinder, But it, can not be mobile according to X-axis due to the presence of concrete core.

Figure 10 table shows the freedom degree of side gusset.

Figure 11 is made in STAAD.Pro V8i program, using finite element method analysis to simulate the feature of floor support plate one side Load needed for the section of plate reaches yield strength, is distributed on the side gusset of model.Mode is as follows: the upper half of side gusset Part, loading direction are-Z.The lower half portion of side gusset, loading direction are+Z

The fold and Displacement Analysis result of Figure 12 .X, Y and Z-direction.

Figure 13 shows the connection of column-beam.

Figure 14 shows anchorage length (11).

Specific embodiment

The present invention is related to floor support plate made of steel plate, preferably cold-reduced sheet (CR), including a core (1) and at least one It towards inner space backing plate outstanding (2), is contacted with concrete (4), includes a series of perforation (3) in the backing plate whole length, As shown in Figures 2 and 3.Before concrete setting, concrete can be from these perforation across being formed mixed and after concrete setting Solidifying Tu Qiao (5) use circles mark in Fig. 5, thus guarantee the combined column synergistic effect using steel construction in the present invention, thus Steel and concrete quality are improved, it is thus possible to plate thickness be reduced, so that finished product has higher economic feasibility.

These floor support plates are made of zinc-plated steel or stainless steel, and thickness fluctuates between 0.45 millimeter and 3 millimeters.Compared to it Under, it is existing for the solution of compound cross-section, the stress transfer device for needing to weld with larger thickness or compacting section Technology eventually leads to increased costs, and above-mentioned cylinder is caused not have competitiveness, and energy bring income is fewer and fewer.

Above-mentioned floor support plate (1) is L shape (see Fig. 3 A and 4A), C-shaped (see Fig. 3 B and 4B) or U-shaped (see Fig. 3 C and 4C) and every A end has a pair of of backing plate (2).

In a preferred embodiment of the invention, the width of floor support plate inner core (1) should be less than 150 millimeters, backing plate (2) For width between 50 millimeters and 75 millimeters, the width of best backing plate (2) is 75 millimeters, and perforate (3) equidistantly divide along backing plate Cloth, the side edge relative to backing plate are placed in the middle.The diameter of perforation between 25 millimeters and 38 millimeters, best diameter be 25 millimeters, two The spacing (L) of a perforated base is 1 to 2 times of penetration hole diameter, and the preferably spacing is 75 millimeters, perforation (3) center and backing plate (2) The distance between edge is 37.5 millimeters.

The application further includes the entirety that combined column is built using floor support plate and constructive structural system.

The combined column is made of the cooperation set lining combined comprising floor support plates different in the present invention.In order to construct pipe fitting, temporarily When by epobond epoxyn or by 70XX type solder joints floor support plate backing plate (2), to make the perforation of adjacent backing plate (3) it is overlapped, is flowed through convenient for concrete, a hollow space is created inside floor support plate, form pipe fitting section according to cylinder sizes. Eventually by the floor support plate for constituting pipe fitting is engaged in hollow space casting concrete, after concrete setting, by binding across wearing The concrete inner core in hole (3) penetrates section, is formed concrete bridge (5), reinforces the cooperation compound system of floor support plate-concrete inner core System, realizes required connection and interaction, enables compound cylinder by regulation operation and each element work compound.It is logical The stress transfer that the drag of concrete bridge cross-sectional shear device realizes inner core between the floor support plate that cooperates is crossed, as shown in Figure 5 A and 5B, Concrete bridge section passes through in perforation (3) insertion concrete core.

" L ", " C " or U-typed steel plate in Fig. 2 and Fig. 3 are answered for the operation between balance concrete and steel plate section Ensure: when shearing failure occurs in the concrete (2) for passing through perforation, then creep occurs for steel plate (1), therefore, can make full use of every The maximum performance of a element.

In a preferred alternative hereto of the invention, the cylinder of pipe fitting includes the floor support plate that four shapes are L (1A), position In corner, it is connected to the floor support plate that four centrally located shapes are C (1B), as shown in Figure 5A.In another of the invention In embodiment, pipe fitting includes the floor support plate that four shapes are U (1C), as shown in Figure 5 B.

However, the entirety and constructive structural system in the application further include concrete core.In an implementation of the invention In scheme, the compressive strength of the Mixed Design of concrete core is 40 megapascal.

In preferred alternative solution, water/cement ratio=0.4 of concrete mix includes high efficiency water reducing agent, based on changing Property polycarboxylate etc. water-reducing agent, cement consumption is 16 ml/kgs, and including coarse aggregate, and such as full-size is 15 millis The rubble and end of rice have the circular cross-section metallic fiber of grasp, belong to ASTM A820-11 standard I class, have characteristics that Diameter: 0.75 millimeter ± 0.03 millimeter, length: 60 millimeters ± 0.03 millimeter, minimum stretching resistance: 1,100 megapascal.Metallic fiber disappears Consumption rate: 160 kilograms per cubic meter.

For the concrete of this metallic fiber ratio, it is necessary to carry out laboratory test to determine its shearing strength, the intensity Increase with the increase of this aggregate.Shear strength test standard: JSC SF-6.Fig. 6 is test chart and photo.In the test In, sample is 500 millimeters × 150 millimeters × 150 millimeters of beam, and testing is pure shear, for simultaneously by the member compressed Part can obtain conservative result.At this by engineer: Fabi á n Augusto Lamus B á ez and Sergio Mauricio In the research that Segura Arenas is executed: " reinforcing preceding regular tenacity concrete II type fracture property with short steel fibre ", referring to the The annex of page 166: 1, wherein providing that the coagulation soil classifiction is 15.46 ± 0.65 megapascal, this is used in middle column body of the present invention The intensity of concrete.

Finally, this building method is also the component part of target described herein, comprising the following steps:

A. the cartridge type for needing to build according to you manufactures L and C-shaped or U-shaped floor support plate；

B. pass through adhesive or interim engagement backing plate (2) of welding, it is ensured that the perforation (3) of adjacent backing plate is overlapped, and is formed by mixing The hollow space of solidifying soil filling, and hollow space is formed inside engagement floor support plate, to constitute pipe fitting；

C. the inner space of concrete filled tube is used；With

D. concrete setting is waited then to form coagulation in this way after the concrete core for passing through perforation (3) penetrates section solidification Tu Qiao (5), and floor support plate can be finally engaged, reinforce cooperation floor support plate-concrete inner core compound cylinder.

Embodiment

Embodiment 1. builds details

Compound column joint-pedestal pier: it is suitable for reinforced concrete structure and steel construction.As shown in fig. 7, in compound cross-section (6) concrete core (4) is internal, and the extension of the first reinforcing section stretched by cylinder (6) from pedestal (7) forms connection structure, Its length is not less than the length of run (61) of reinforcing bar.It will by leveling nut (71), adjusting nut (72) and foundation bolt (73) Cylinder (6) is connected on pedestal (7).Basic plate framework (8) is only used for facilitating the laying of liner plate.

Compound column joint-beam or floor: it is suitable for reinforced concrete structure, especially plate or floor (9).As shown in figure 8, Inside the continuous compound column section concrete core formed by liner plate (63), added by the last one and first of cylinder (6) Gu the extension of section (62) forms connection structure, length is not less than the length of run (61) of reinforcing bar.

Compound column joint-beam or floor: it is suitable for steel construction.As shown in figure 8, by the way that girder steel is connected straight binding steel Muscle forms connection structure.It, will by leveling nut (91), adjusting nut (92) and foundation bolt (73) as the previous case Cylinder (6) is connected on plate (9).

The analysis foundation of embodiment 2. development and advantage:

Design standard: standard: ACI-318-11 and NSR-10, chapters and sections: " compound cross-section cylinder " and related cooperation floor support plate AISI standard.

Floor support plate steel: as described above: ASTM A572 galvanized steel plain sheet cold-reduced sheet, thickness: 0.45 millimeter~2 millimeters.Or 302 stainless steels, thickness: 0.5 millimeter~1.5 millimeters.It analyzes the standard for being suitable for cold formed steel: AISI.The standard is related can It is stainless including 302CR, it is specified that its normalization to be applied to the standard of non-carbon steel steel in A3.2 and the A3.3 section of ductility Steel.

The compatibility of deformation: for ASTM A572 CR galvanized steel and 302 stainless steels and above-mentioned Mixed Design specification Concrete keeps the equivalence of maximum unit deformation in 0.2% elastic range.The basic assumption of composite system behavior.

The minimum thickness of floor support plate: applied code: AISI B.1.1: " about between wing plane width and its thickness (w/t) The considerations of relationship factor ", it is intended to guarantee that section occurs that creep can be reached before local deformation.In addition, due to being poured in space Concrete core, therefore floor support plate is supported, inside cannot deform.Above-mentioned analysis is by finite element in STAAD.Pro V8i program Method confirms, to simulate the behavior expression of the floor support plate supported by concrete inner core wherein one side.

In instance analysis shown below, modeled for ASTM A36 sheet metal creep limit: 250 megapascal or 2549 kilograms/ Square centimeter, with a thickness of 0.6 millimeter, width is 200 millimeters, 2480 millimeters long, belongs to the typical side of floor support plate.Side edge section The boundary condition of point (10) is: the influence of compressed load, the one-movement-freedom-degree of Z axis, the i.e. vertical displacement of cylinder.But due to There are concrete cores, and do not consider poisson effect, and X-axis can not move.Poisson effect will be ineffective most in concrete core The stage occurs afterwards, and referring to Fig. 9, red-green icon, i.e. bracket are shown in right frame: bracket-overall structure (Supports- WholeStructure).Chart in Figure 10 shows the freedom degree of these avris nodes.Lower support (the ginseng of blue model See Fig. 9), i.e. the lower end of column is and hinged similar, has rotary freedom, but hampers the vertical displacement of these nodes.

The model will bear necessary load, so that the plate section being distributed on model avris node reaches creep limit, Mode is as follows: the top half (10) of model side gusset, and loading direction is-Z.The lower half portion (10) of model side gusset, load Direction is+Z.After applying ordinance load on the upper surface of concrete core, since the stress between concrete core and floor support plate passes Pass generation load-up condition.Referring to Figure 11.Under the above conditions after moving model, the direction of displacement Y (pleat for needing most node is determined Wrinkle): central node direction of displacement: X, Y, Z.As a result it is shown in the table of Figure 12.Without perpendicular to plate plane Y-direction or fold Displacement.

According to acquired results:

(C_F) 20 centimetres * 0.06 centimetre=3058.8 kilogram of creep loading=2549 kilograms/square centimeter *

Side gusset number: 250

Above-mentioned data are disclosed using the mathematical model of finite element and are not generated " fold " in pipe fitting thin plate or floor support plate, In accordance with the limitation of concrete core, allow to use thin plate as tube material in the present invention, and current standard NSR-10 or ACI do not permit Perhaps thin plate is used.

Stress transfer between floor support plate and concrete core: this transmitting and the hypothesis in 4.2 sections: deformation compatibility permits Perhaps the cooperation or independently working between two components of composite system (floor support plate), hinders the displacement between two components, as above It is described.Stress transfer model between two components is defined as follows according to above content: " between concrete core and floor support plate Stress transfer is generated because of the drag of concrete bridge (5) clipper, and concrete bridge passes through 25 milli of diameter on floor support plate backing plate (2) The perforation (3) of rice, and it is embedded in concrete core." in order to make full use of the drags of two kinds of components, it should be ensured that it is included in reasonable short length We are called the interior concrete bushing of anchorage length (La) (11)-to degree-, guarantee any component of floor support plate reach creep point it Before must not slide.In order to verify this analysis, as shown in example, the anchorage length (11) of stainless steel floor support plate: L125 will be determined X1 millimeters of millimeter, creep limit are higher than ASTM A572 hot-galvanized steel CR.See Figure 14.

Perimeter of section L125x1:p=2 (125 millimeters+75 millimeters)=400 millimeters

Concrete bushing diameter of section: D=25 millimeters

Concrete bushing area: A_c=π r²=π 12.5²Square millimeter=490.86 square millimeters

Anchorage length: L_a

Each clipped number of cross sections of bushing: 2

Anchorage length: L_a=76 millimeter+25 (n-1)

Section effective area L125x1:A_esX1=350 square millimeters of=(400 millimeters -2x25 millimeters)

302: 1.308 megapascal of creep limit stainless steel CR

Steel section reaches maximum tension when creep point: T_s

T_s=350 square millimeters of 1.308 megapascal=457.800 N x

Anti-shear concrete intensity: v_c=15.46 megapascal

Concrete bushing section maximum cuts limit: T_c

T_c=2n490.86 square millimeters of x15.46 megapascal=n15.177,4 ox

To,

L_a=76 millimeter of+25 millimeter=801 millimeter (30-1)

In short, the liner plate in the application provides the selection using CR plate scene construction pipe fitting, it is convenient for constructive operation: from Storage is transported, then to the process of pipe fitting assembly, until building up template.

On the other hand, the plate thickness that liner plate uses in the present invention is between 0.45 millimeter and 3 millimeters, this is far below existing There is minimum thickness needed for system in technology (should be greater than 6 millimeters).In addition, the thickness of opening section can be according to pole section institute Need the demand of quantity and change: in the conventional pipe with uniform wall thickness, this is impossible.

Another outstanding advantages of the invention are, due to not needing to answer the add ons of solder joints (such as to be welded on type Material or protrusion, sinker or reinforcing bar on structure pipe fitting), cost can be reduced.

In addition to this, the characteristic of concrete core ensure that necessary shearing strength, which is suitable for two-part compound Operation, i.e. steel pipe fitting and concrete core.In addition, floor support plate is produced on galvanized steel plain sheet or stainless steel plate, according to the erosion of medium Property, two kinds of etch-proof guard methods can be used.

Finally, using the opening based plate in 302 stainless steels steel pipe fitting, creep limit can be constructed are as follows: 1,138,000,000 Pa, compared with 412 megapascal of creep limit of reinforcing bar or 345 megapascal of creep limit of ASTM A572 CR galvanized steel, demand material Quantity is less.

Claims (21)

1. by the floor support plate of steel plate construction, which is characterized in that including a core (1) and one or two backing plate (2), backing plate direction The inclination of column body space, touches concrete (4), which includes a series of perforation (3), penetration hole diameter model along its length It is trapped among between 25 millimeters and 38 millimeters, the spacing (L) of two perforated bases is 1 to 2 times of penetration hole diameter.

2. floor support plate according to claim 1, which is characterized in that steel plate is cold rolling (CR) template.

3. floor support plate according to claim 2, which is characterized in that floor support plate is made of zinc-plated steel or stainless steel.

4. floor support plate according to claim 1, which is characterized in that plate thickness range is 0.45 millimeter to 3 millimeters.

5. floor support plate according to claim 1, which is characterized in that plate L, C or U-shaped, there are two pads for each end Plate (2).

6. floor support plate according to claim 1, which is characterized in that floor support plate (1) inner core width range is 1 millimeter to 150 Millimeter.

7. floor support plate according to claim 1, which is characterized in that backing plate (2) width range is 50 millimeters to 75 millimeters.

8. floor support plate according to claim 7, which is characterized in that the width of backing plate (2) is 75 millimeters.

9. floor support plate according to claim 1, which is characterized in that perforation (3) is equally spaced along backing plate (2), relative to The side edge of backing plate (2) is placed in the middle, and diameter range is 25 millimeters to 38 millimeters.

10. floor support plate according to claim 9, which is characterized in that the diameter of perforation is 25mm, and two perforated bases Distance (L) be 1 to 2 times of penetration hole diameter.

11. floor support plate according to claim 10, which is characterized in that the distance (L) of two perforated bases is 75 millimeters, is worn The distance between hole (3) center and backing plate (2) edge are 37.5 millimeters.

12. a kind of liner plate, which is characterized in that the pipe fitting including section structure described in claim 1 to 11, and it is limited in pipe fitting Internal concrete core (4).

13. liner plate according to claim 12, which is characterized in that including four L (1A) shape floor support plates, it is located at corner, It is connect by its backing plate (2) with the backing plate (2) of four centrally located C (1B) shape floor support plates, perforation (3) weight of adjacent backing plate It closes.

14. liner plate according to claim 12, which is characterized in that pass through backing plate (2) U interconnected (1C) including four Shape floor support plate.

15. liner plate described in 3 or 14 according to claim 1, which is characterized in that floor support plate backing plate (2) is viscous by epoxide resin type Mixture or the interim engagement of 70XX type welding, are formed in the interior thereof hollow space, to form pipe fitting section according to cylinder area.

16. liner plate according to claim 15, which is characterized in that floor support plate backing plate (2) is by binding across perforation (3) The section that penetrates of concrete inner core finally engages, and is formed concrete bridge (5).

17. liner plate according to claim 12, which is characterized in that the stretching resistance of concrete core mixture is 40 megapascal.

18. liner plate according to claim 17, which is characterized in that concrete mix includes that the metal of circular cross-section is fine Dimension, end have grasp, and diameter is 0.75 millimeter ± 0.03 millimeter, and length is 60 millimeters ± 0.03 millimeter, minimum stretching resistance: 1,100 megapascal.

19. liner plate according to claim 18, which is characterized in that the ratio of metallic fiber is 160 in concrete mix Kilograms per cubic meter.

20. liner plate according to claim 18, which is characterized in that the water of concrete mix/cement ratio=0.4 includes High efficiency water reducing agent, the water-reducing agent based on modified polycarboxylic acid salt etc., cement consumption are 16 ml/kgs, and including coarse aggregate, Such as the rubble that full-size is 15 millimeters.

21. the method for building special liner plate, comprising the following steps:

A. the cartridge type for needing to build according to you manufactures L and C-shaped or U-shaped floor support plate；

B. pass through adhesive or interim engagement backing plate (2) of welding, it is ensured that the perforation (3) of adjacent backing plate is overlapped, and is formed by concrete The hollow space of filling, and hollow space is formed inside engagement floor support plate, to constitute pipe fitting；

C. the inner space of concrete filled tube is used；With

D. concrete setting is waited then to form concrete bridge in this way after the concrete core for passing through perforation (3) penetrates section solidification (5), and floor support plate can be finally engaged, reinforces cooperation floor support plate-concrete inner core compound cylinder.