CN105421661A - Large-diameter steel pipe concrete column with built-in longitudinal partition plates and construction method of large-diameter steel pipe concrete column - Google Patents
Large-diameter steel pipe concrete column with built-in longitudinal partition plates and construction method of large-diameter steel pipe concrete column Download PDFInfo
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Abstract
The invention discloses a large-diameter steel pipe concrete column with built-in longitudinal partition plates and a construction method of the large-diameter steel pipe concrete column. The large-diameter steel pipe concrete column comprises a steel pipe and the N partition plates built in the steel pipe, wherein N ranges from 3 to 5 and is a natural number, the N partition plates are of the same structure and are longitudinally arranged, and that is, the plate length directions of the partition plates are all consistent with the axial direction of the steel pipe. The edges of the lateral sides of the N partition plates are sequentially connected with one another through connector buckles and connecting plates and make contact with the inner wall of the steel pipe through the connector buckles. A closed space is formed after the N partition plates are connected. The space formed by the N partition plates and the space between the partition plates and the steel pipe are filled with concrete through pouring. The longitudinal partition plates are built in the steel pipe concrete column, and therefore on one hand, the hoop effect on concrete in the steel pipe can be improved, and on the other hand, the built-in partition plates have a heat conduction bridge function, and the temperature difference of concrete in the steel pipe is decreased. Meanwhile, the invention discloses the construction method of the large-diameter steel pipe concrete column.
Description
Technical field
The present invention relates to the building unit in building structure and construction method thereof, specifically refer to a kind of large footpath steel core concrete column and construction method thereof of built-in longitudinal baffle.
Background technology
At present, the building of China is based on reinforced concrete structure.Reinforced concrete structure technology maturation, anti-pressure ability are strong, fire resistance good, cost is low, but along with building trade is constantly towards standardization, batch production future development, it exposes a lot of shortcoming, and as constructed, Complicated Periodic is long, industrialization level is low.In recent years, encased structures is widely used because of its superior mechanical property and good anti-seismic performance in high-rise super highrise building.Concrete filled steel tube, based on axle center or compression member with small eccentricity, combines the advantage of concrete high compressive strength and shaped steel high-flexural strength well.Its form is limited to concrete filled steel tube, rectangular steel-tube concrete column more.
Along with China's expanding economy, domestic super highrise building height constantly refreshes, and the concrete filled steel tube column diameter of middle and lower part floor is increasing, and the use of Large-diameter Steel pipe concrete column is more and more general.Large-diameter Steel pipe concrete column compares common diameter a lot of technical issues that need to address, wherein how to ensure the good combination of concrete in mass and steel pipe, ensures that the rear intensity of building of pipe inner concrete is limit the difficult problem that Large-diameter Steel pipe concrete column applies always.
About the definition of concrete in mass, both at home and abroad regulation is not quite similar, such as: the regulation of Architectural Institute of Japan's standard (JASS5) is more than 80cm with structural section thickness definition, and temperature difference between inside and outside concrete defines more than 25 DEG C; U.S.'s coagulation being learned (ACI) is that the cubic deformation caused whether can produce the heat of hydration comes qualitative; China proposes in " mass concrete construction specification " (GB50496-2009): " concrete structural solid minimum geometries is not less than the large scale of construction concrete of lm; or the expectation variations in temperature that can cause because of cementitious material aquation in concrete and contraction and the concrete that causes harmful cracks to produce, be referred to as concrete in mass." although above definition is not quite similar, and can find out that this concept of concrete in mass has close ties with concrete temperature change and concrete shrinkage deformation.
Engineering practice proves, a large amount of heats is discharged due to the hydration of cement in the setting and harden process after casting of concrete in mass, concrete is the non-conductor of heat, these heats are not easy to derive at short notice, progressively form Large-diameter Steel pipe concrete middle portion temperature high, and surface temperature this situation relatively low, namely cause the temperature deformation of coagulation being built block internal expansion Outer shrink.After internal temperature reduces, because concrete filled steel tube inside there often is not shaped steel or reinforcing bar, concrete forms a large amount of microcrack of inner formation, causes middle part concrete strength to reduce.
In encased structures, only under the prerequisite ensureing close contact between pipe inner concrete and steel pipe inner wall, these two kinds of different materials of concrete and steel pipe could strong bonded, formed overall, jointly stressed, the superiority of this advanced composite material (ACM) could realize.But, current construction technology ensures that the concrete of steel duct completely evenly enriches and zero defect owing to there is no method, particularly Large-diameter Steel pipe concrete column due to hydration heat effect remarkable, inner concrete defect is obvious, causes steel tube and tube inner concrete to be easy to unsticking phenomenon occurs.
Steel pipe concrete pipe inner concrete unsticking generally comprises two kinds of situations: one be concrete filled steel tubular member pipe inner concrete filling process or hydration heat effect cause leakiness, cavity and crack; Two is that steel pipe and concrete contact surface are very few, and causes steel pipe and concrete interface place to produce unsticking.
Summary of the invention
An object of the present invention is to provide a kind of large footpath steel core concrete column of built-in longitudinal baffle, the built-in longitudinal baffle of this steel core concrete column can increase the concrete Confinement effect of steel duct on the one hand, Concrete Structure ductility, significantly improve the compression load bearing capacity of steel core concrete column, and increase the contact area of concrete and dividing plate, ensure that dividing plate is to concrete operative constraint, built-in dividing plate has heat-conductive bridges function on the other hand, concrete for steel duct aquation heat can be passed to steel pipe walls by the conduction of joint fastener, the temperature difference of inner concrete is reduced, the impact that effective minimizing concrete hydrating fuel factor causes, thus the micro-cracks that inner concrete in mass hydration heat effect causes can be greatly reduced, ensure that concrete intensity.
Above-mentioned purpose of the present invention realizes by following technical solution: a kind of large footpath steel core concrete column of built-in longitudinal baffle, comprise steel pipe and be built in the dividing plate in steel pipe, it is characterized in that: described dividing plate is N block, wherein, the quantity of N is 3 ~ 5, and N is natural number, be preferably 3 or 4, the structure of N block dividing plate is all identical, N block dividing plate is all longitudinally arranged, namely the plate length direction of dividing plate is all consistent with the axis of steel pipe, the side edge place of N block dividing plate is connected with junction plate successively by joint fastener, and contacted with steel pipe inner wall by joint fastener, the space of a relative closure is surrounded after N block dividing plate is connected, N block dividing plate enclose in the space of covering and the space between dividing plate and steel pipe all to build and be filled with concrete, form whole steel core concrete column.
Large footpath of the present invention steel core concrete column has additional built-in longitudinal baffle and by joint fastener and junction plate, the space of a relative closure is surrounded after N block dividing plate is connected, N block dividing plate enclose in the space of covering and the space between dividing plate and steel pipe all to build and be filled with concrete, dividing plate increases on the one hand to the concrete Confinement effect of steel duct, Concrete Structure ductility, significantly improve the bearing capacity of steel core concrete column, inner division plate also has heat-conductive bridges function on the other hand, concrete for steel duct aquation heat is passed to steel pipe walls by joint fastener, thus temperature difference when effectively reducing inner concrete solidification, reduce the phenomenon of concrete inner generation micro-cracks because hydration heat effect causes, ensure that concrete intensity, also the generation of steel pipe inner wall and concrete generation unsticking phenomenon is prevented, simultaneously, significantly increase the contact area of concrete and steel pipe, resistant slide ability between steel pipe and concrete is improved, meanwhile, the increase of contact area also limits the generation of concrete shrinkage crack.
In the present invention, described joint fastener is the cross section along steel shaft to setting is T-shaped T-shaped plate, T-shaped plate is by weld mutually and perpendicular transverse slat and riser form, the termination of riser is welded mutually with steel pipe inner wall, the two ends of transverse slat contact with the side edge place of adjacent two pieces of dividing plates and hold out against respectively, described junction plate parallels with the transverse slat of joint fastener, the quantity of junction plate is identical with the quantity of joint fastener, the both sides of junction plate are welded mutually with the side edge place of adjacent two pieces of dividing plates respectively, and the N block dividing plate after welding forms complete dividing plate skeleton.
Large footpath of the present invention steel core concrete column, can adopt round steel pipe, also can adopt rectangular steel tube, built-in dividing plate can adopt circular arc plate, also can adopt flat board, specifically can adopt following multiple preferred structure:
Described steel pipe is the pipe that diameter is greater than 1m, and preferably diameter range is 1 ~ 2.5m, and described steel core concrete column is cylinder.Diameter of steel tube in the present invention is all vial external diameters.
When steel pipe adopts pipe, dividing plate can adopt following various structures:
Described dividing plate is the three pieces of arc plates in arch to steel pipe center projection, described joint fastener is three, three form three sealing wires between joint fastener and steel pipe, article three, sealing wire is by steel pipe trisection, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 120 °.
Described dividing plate is the four pieces of arc plates in arch to steel pipe center projection, described joint fastener is four, four form four sealing wires between joint fastener and steel pipe, article four, sealing wire is by the steel pipe quartering, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 90 °.
Described dividing plate is three pieces of flat boards, described joint fastener is three, three form three sealing wires between joint fastener and steel pipe, and three sealing wires are by steel pipe trisection, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 120 °.
In the present invention, described steel pipe is the square tube that catercorner length is greater than 1m, and preferably catercorner length scope is 1 ~ 2.5m, and described steel core concrete column is cross section is foursquare cuboid.Catercorner length in the present invention is all the outer catercorner lengths of vial, measures with outermost sideline.
When steel pipe adopts square tube, dividing plate can adopt following structure:
Described dividing plate is the four pieces of arc plates in arch to steel pipe center projection, described joint fastener is four, four form four sealing wires between joint buckle and steel pipe, article four, sealing wire is all positioned at the corner of steel pipe, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 90 °.
As the preferred embodiments of the present invention, described dividing plate is steel plate, be the pipe of 1m ~ 1.8m for diameter of steel tube, or steel pipe diagonal is the square tube of 1m ~ 1.8m, dividing plate preferred thickness is 20 ~ 36mm, is the pipe of 1.8m ~ 2.5m for diameter of steel tube, or steel pipe diagonal is the square tube of 1.8m ~ 2.5m, dividing plate preferred thickness is 28 ~ 50mm, and described junction plate is also steel plate, and the preferred thickness of junction plate is 28 ~ 50mm.
Two of object of the present invention is to provide the construction method of the large footpath steel core concrete column of above-mentioned built-in longitudinal baffle.
Above-mentioned purpose of the present invention realizes by following technical solution: the construction method of the large footpath steel core concrete column of inner division plate, it is characterized in that, this construction method comprises the steps:
(1) in factory, complete the processing of steel pipe, dividing plate, joint fastener and junction plate, and complete welding between dividing plate with junction plate;
(2) welder enters steel duct and carries out joint fastener welding, and joint fastener is welded on steel pipe inner wall, and without the need at steel duct welding diaphragm;
(3) at the construction field (site), first lifting is welded with the steel pipe of joint fastener, and then lifting is welded with the dividing plate of junction plate, and static pressure dividing plate enters in steel pipe;
(4) to concreting in steel pipe, the steel core concrete column that shaping rear formation is whole.
Compared with prior art, the present invention has following remarkable result:
1. in the steel core concrete column of large footpath of the present invention, steel pipe and built-in longitudinal baffle composition " arch " shape structure, increase the Confinement effect of inner concrete, Concrete Structure ductility, significantly improves the bearing capacity of steel core concrete column; Result of calculation shows, the steel core concrete column stress performance of built-in circular arc dividing plate is also better than triangular planar dividing plate, and the stress performance of the large footpath steel core concrete column of these two kinds of inner division plates is all obviously better than the steel core concrete column of common non-inner division plate.
Table 1 be classified as the axial bearing capacity comparison sheet of the steel core concrete column of built-in four pieces of circular arc dividing plates and the steel core concrete column of built-in triangle baffle, the axial bearing capacity showing the steel core concrete column of built-in four pieces of circular arc dividing plates is obviously better than the steel core concrete column of built-in triangle baffle, and is all obviously better than the steel core concrete column of non-inner division plate.
Table 1: the steel core concrete column stress performance of built-in circular arc dividing plate is better than the axial bearing capacity comparison sheet of triangle baffle
2. in the steel core concrete column of large footpath of the present invention, for square steel tube concrete column, inserting of circular arc dividing plate, after effectively preventing concrete conquassation, heaving of square steel pipe wallboard.Principle is as follows:
A. after the concrete pressure break of circular arc diaphragm internal, concrete produces pressure to circular arc dividing plate, and circular arc dividing plate plays the effect of " arch bridge ", and circular arc dividing plate root produces thrust at springer, and this thrust makes square steel pipe wallboard tension.
B. the pressure that produces after effectively bearing most of concrete pressure break of circular arc dividing plate, the more conventional Concrete-Filled Square Steel Tube of concrete pressure being delivered to wallboard significantly reduces.
By making wallboard produce pulling force and produce the pressure being passed to wallboard after reducing concrete pressure break, the local drum effectively alleviating square steel pipe wallboard is bent.
3. in the steel core concrete column of large footpath of the present invention, after built-in longitudinal baffle, after especially built-in circular arc dividing plate, the contact area rate conventional steel concrete component of concrete and steel pipe has significantly to be increased, for in four embodiments of the present invention, embodiment one, contact area increases 120%, embodiment two, contact area increases 140%, embodiment three, and contact area increases 110%, embodiment four, contact area increases 150%.
Resistant slide ability between steel pipe and concrete is improved.
4. in the steel core concrete column of large footpath of the present invention, inner concrete in mass is owing to there being the constraint of dividing plate, especially, when inner division plate is circular arc dividing plate, effectively can reduce the micro-cracks that inner concrete in mass hydration heat effect causes, ensure that concrete strength.
5. due to the non-conductor that concrete is heat, the heat of hydration produces heat and is not easy at short notice to derive.In the steel core concrete column of large footpath of the present invention, after inserting dividing plate, after especially built-in circular arc dividing plate, effect that steel diaphragm plays " heat bridge ".Steel plate is rapidly by the heat conduction of inside extremely outer steel pipe, and outer steel pipe contacts with air and efficiently radiates heat.The existence of dividing plate makes the inner concrete temperature difference reduce, and effectively reduces the impact that hydration heat effect causes.
6., when the built-in circular arc dividing plate of steel pipe, welder is intercepted by circular arc dividing plate cannot enter steel duct enforcement welding, directly circular arc dividing plate and steel pipe is carried out welding to there is constructional difficulties.And in the steel core concrete column of large footpath of the present invention, circular arc dividing plate being connected with adopting Novel fastener between steel pipe, greatly facilitating the construction of circular arc dividing plate, and significantly reducing the duration.
During construction, first welder enters steel duct and carries out fastener welding, does not need at steel duct welding circular arc dividing plate.After fastener and circular arc dividing plate completion of processing, be transported to on-site hoisting, first lift outside steel pipe, treat that outside steel pipe is fixed and after docking with lower end steel pipe, lifting Inner arc dividing plate static pressure circular arc dividing plate carries out steel duct, then concreting.
Meanwhile, joint fastener and arc plate add at component and need ensure man-hour to hold out against between the two, and close contact, ensures that heat transfer property is stablized, thus effectively can transmit the heat of hydration that inner concrete produces in process of setting.
Large footpath of the present invention steel core concrete column, solve large footpath steel core concrete column, because steel pipe inner concrete causes concrete and steel pipe inner wall cannot close contact and form the entirety problem that reduces of stressed, the actual compressive strength of pipe inner concrete jointly without good constraint, concrete temperature stress, concrete shrinkage.Can be applicable to high level, super highrise building, transfer truss, towering structure, concrete-filled steel tubes arch bridge etc. need the occasion adopting large diameter steel pipe concrete component.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the sectional view of the present invention large footpath steel core concrete column embodiment one;
Fig. 2 is the local structural graph of the present invention large footpath steel core concrete column embodiment one, the annexation between display joint fastener and steel pipe, and welder enters the sight carrying out weld in steel pipe;
Fig. 3 is the sectional view of the present invention large footpath steel core concrete column embodiment two;
Fig. 4 is the sectional view of the present invention large footpath steel core concrete column embodiment three;
Fig. 5 is the sectional view of the present invention large footpath steel core concrete column embodiment four;
Fig. 6 is the Force principle schematic diagram of the present invention large footpath steel core concrete column embodiment four.
Description of reference numerals
101-pipe, 102-arc plate, 103-joint fastener,
103a-transverse slat, 103b-riser, 104-junction plate;
201-pipe, 202-arc plate, 203-joint fastener, 204-junction plate;
301-pipe, 302-dull and stereotyped, 303-joint fastener, 304-junction plate;
401-square tube, 402-arc plate, 403-joint fastener, 404-junction plate.
Detailed description of the invention
Embodiment one
The embodiment one of the large footpath steel core concrete column of a kind of built-in longitudinal baffle of the present invention as shown in Figure 1 and Figure 2, comprises steel pipe and is built in dividing plate in steel pipe, and the pipe 101 of steel pipe to be diameter be 1.8m, steel pipe wall thickness is 50mm, and steel core concrete column is cylinder.
Dividing plate is three block plates, block board thickness is 20mm, the structure of three pieces of dividing plates is all identical, three pieces of dividing plates are all longitudinally arranged, namely the plate length direction of dividing plate is all consistent with the axis of steel pipe, the side edge place of three pieces of dividing plates is connected with junction plate 104 successively by joint fastener 103, and contacted with steel pipe inner wall by joint fastener 103, the space of a relative closure is surrounded after three pieces of dividing plates are connected, three pieces of dividing plates enclose in the space of covering and the space between dividing plate and steel pipe all to build and be filled with concrete, form whole steel core concrete column.
In the present embodiment, joint fastener 103 is the cross section along steel shaft to setting is T-shaped T-shaped plate, T-shaped plate is by weld mutually and perpendicular transverse slat 103a and riser 103b forms, the termination of riser 103b is welded mutually with steel pipe inner wall, the two ends of transverse slat 103a contact with the side edge place of adjacent two pieces of dividing plates and hold out against respectively, junction plate 104 is also steel plate, the thickness of junction plate 104 is 28mm, parallel with the transverse slat 103a of joint fastener 103, the quantity of junction plate 104 is identical with the quantity of joint fastener 103, the both sides of junction plate 104 are welded mutually with the side edge place of adjacent two pieces of dividing plates respectively, three pieces of dividing plates after welding form complete dividing plate skeleton, the dividing plate skeleton formed is triangle starframe.Dividing plate skeleton has good integral rigidity and intensity, and supporting capacity is strong.
Dividing plate in the present embodiment is the three pieces of arc plates 102 in arch to steel pipe center projection, three pieces of arc plate 102 structures are identical, the right arc radius of every block arc plate 102 is 1150mm, central angle is 60 °, joint fastener 103 is three, form three sealing wires between three joint fasteners 103 and steel pipe, three sealing wires are by steel pipe trisection, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 120 °.
As the conversion of the present embodiment, dividing plate can be N block, wherein, N >=3, and N is natural number, the structure of N block dividing plate is all identical, the quantity of N is 3 ~ 5, be preferably 3 or 4, the plate length direction of N block dividing plate is all consistent with the axis of steel pipe, the side edge place of N block dividing plate is connected with junction plate successively by joint fastener, and contacted with steel pipe inner wall by joint fastener, the space of a relative closure is surrounded after N block dividing plate is connected, N block dividing plate enclose in the space of covering and the space between dividing plate and steel pipe all to build and be filled with concrete, form whole steel core concrete column.
The side edge place of N block dividing plate is connected with junction plate 104 successively by joint fastener 103, and the N block dividing plate after connection forms the complete dividing plate skeleton of large footpath steel core concrete column.
As the conversion of the present embodiment, steel pipe can select diameter to be the pipe 101 of 1m ~ 2.5m, and preferred diameter is the pipe of 1.5m ~ 2m, steel pipe wall thickness can within the scope of 36 ~ 60mm value.As the conversion of the present embodiment, be the pipe of 1m ~ 1.8m for diameter of steel tube, dividing plate preferred thickness is 20 ~ 36mm, is the pipe of 1.8m ~ 2.5m for diameter of steel tube, dividing plate preferred thickness is 28 ~ 50mm, junction plate 104 also can within the scope of 28 ~ 50mm value.
The construction method of the large footpath steel core concrete column of above-mentioned built-in longitudinal baffle, comprises the steps:
(1) in factory, complete the processing of steel pipe, dividing plate, joint fastener and junction plate, and complete welding between dividing plate with junction plate;
(2) welder enters steel duct and carries out joint fastener welding, and joint fastener is welded on steel pipe inner wall, and without the need at steel duct welding diaphragm;
(3) at the construction field (site), first lifting is welded with the steel pipe of joint fastener, and then lifting is welded with the dividing plate of junction plate, and static pressure dividing plate enters in steel pipe;
(4) to concreting in steel pipe, the steel core concrete column that shaping rear formation is whole.
In this implementation method, if steel core concrete column is higher, needs many steel pipe docking, then need during construction first to lift steel pipe bottom, then successively steel pipe is docked, after steel pipe docking, lift dividing plate again.
The steel pipe of the present embodiment and the type arched structure of dividing plate, increase the Confinement effect of inner concrete, Concrete Structure ductility, significantly improves the bearing capacity of steel core concrete column.Table 2 lists the built-in circular arc dividing plate of embodiment one compared with the axial bearing capacity of common steel tube concrete column, shows from following table result of calculation, and the steel core concrete column stress performance of the built-in circular arc dividing plate in embodiment one is obviously better than common steel tube concrete column.
Table 2: the steel core concrete column of built-in circular arc dividing plate and the axial bearing capacity table of comparisons of common steel tube concrete column
Embodiment two
The embodiment two of the large footpath steel core concrete column of a kind of built-in longitudinal baffle of the present invention as shown in Figure 3, comprise steel pipe and be built in the dividing plate in steel pipe, the pipe 201 of steel pipe to be diameter be 1.8m, steel pipe wall thickness is 50mm, steel core concrete column is cylinder, block board thickness is 20mm, and the thickness of junction plate 204 is 28mm.
With embodiment one unlike, dividing plate in the present embodiment is the four pieces of arc plates 202 in arch to steel pipe center projection, four pieces of arc plate 202 structures are identical, the right arc radius of every block arc plate 202 is 700mm, central angle is 90 °, and joint fastener 203 is four, forms four sealing wires between four joint fasteners 203 and steel pipe, article four, sealing wire is by the steel pipe quartering, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 90 °.The dividing plate skeleton that in the present embodiment, four pieces of arc plates 202 are formed is corner starframe.
The construction method of the large footpath steel core concrete column of above-mentioned inner division plate, identical with embodiment one, at this no longer repeated description.
Table 3 lists the built-in circular arc dividing plate of embodiment two compared with the axial bearing capacity of common steel tube concrete column, shows from following table result of calculation, and the steel core concrete column stress performance of the built-in circular arc dividing plate in embodiment two is obviously better than common steel tube concrete column.
Table 3: the steel core concrete column of built-in circular arc dividing plate and the axial bearing capacity table of comparisons of common steel tube concrete column
Embodiment three
The embodiment three of the large footpath steel core concrete column of a kind of built-in longitudinal baffle of the present invention as shown in Figure 4, comprise steel pipe and be built in the dividing plate in steel pipe, the pipe 301 of steel pipe to be diameter be 1.8m, steel pipe wall thickness is 50mm, steel core concrete column is cylinder, block board thickness is 20mm, and the thickness of junction plate 304 is 28mm.With embodiment one unlike, dividing plate in the present embodiment is three pieces of flat boards 302, joint fastener 303 is three, three sealing wires are formed between three joint fasteners 303 and steel pipe, article three, sealing wire is by steel pipe trisection, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 120 °.Three pieces of flat boards 302 form the dividing plate skeleton of an equilateral triangle.
As the conversion of the present embodiment, dividing plate can be N block, wherein, N >=3, and N is natural number, the structure of N block dividing plate is all identical, the quantity of N is 3 ~ 5, be preferably 3 or 4, such as select the polyliths such as four pieces or five pieces, the structure of N block dividing plate is all identical, the plate length direction of N block dividing plate is all consistent with the axis of steel pipe, the side edge place of N block dividing plate is connected with junction plate successively by joint fastener, and contacted with steel pipe inner wall by joint fastener, the space of a relative closure is surrounded after N block dividing plate is connected, N block dividing plate enclose in the space of covering and the space between dividing plate and steel pipe all to build and be filled with concrete, form whole steel core concrete column.
The construction method of the large footpath steel core concrete column of above-mentioned inner division plate, identical with embodiment one, at this no longer repeated description.The axial bearing capacity of the built-in triangle baffle of embodiment three and common steel tube concrete column listed by table 4
Compare, show from following table result of calculation, the steel core concrete column stress performance of the built-in triangle baffle in embodiment three is obviously better than common steel tube concrete column.
Table 4: the steel core concrete column of built-in circular arc dividing plate and the axial bearing capacity table of comparisons of common steel tube concrete column
Embodiment four
The embodiment four of the large footpath steel core concrete column of a kind of built-in longitudinal baffle of the present invention as shown in Figure 5, Figure 6, comprise steel pipe and be built in the dividing plate in steel pipe, steel pipe is diagonal is 1.77m, the length of side is the square tube 401 of 1.25m, steel pipe wall thickness is 50mm, and steel core concrete column is cross section is foursquare cuboid.
Dividing plate is the four pieces of arc plates 402 in arch to steel pipe center projection, four pieces of arc plate 402 structures are identical, the right arc radius of every block arc plate 402 is 700mm, central angle is 90 °, joint fastener 403 is four, four form four sealing wires between joint buckle and steel pipe, and four sealing wires are all positioned at the corner of steel pipe, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 90 °.The dividing plate skeleton that in the present embodiment, four pieces of arc plates 402 are formed is corner starframe.Four summits of corner starframe are just aligning four corners of rectangular steel tube.
With embodiment two unlike, steel pipe in the present embodiment adopts square tube 401, and block board thickness is 20mm, and the thickness of junction plate 404 is 28mm.
As the conversion of the present embodiment, steel pipe can select diagonal to be the square tube 401 of 1m ~ 2.5m, and preferred diagonal is the square tube 401 of 1.5m ~ 2m, steel pipe wall thickness can within the scope of 36 ~ 60mm value.
As the conversion of the present embodiment, be the square tube of 1m ~ 1.8m for steel pipe diagonal, dividing plate preferred thickness is 20 ~ 36mm, is the square tube of 1.8m ~ 2.5m for steel pipe diagonal, dividing plate preferred thickness is 28 ~ 50mm, and the preferred thickness of junction plate is 28 ~ 50mm.
The construction method of the large footpath steel core concrete column of above-mentioned inner division plate, identical with embodiment one, at this no longer repeated description.Table 5 lists the built-in circular arc dividing plate of embodiment four compared with the axial bearing capacity of common steel tube concrete column, shows from following table result of calculation, and the steel core concrete column stress performance of the built-in circular arc dividing plate in embodiment four is obviously better than common steel tube concrete column.
Table 5: the steel core concrete column of built-in circular arc dividing plate and the axial bearing capacity table of comparisons of common square tube concrete column
For the square steel tube concrete column of the present embodiment, inserting of circular arc dividing plate, after effectively preventing concrete conquassation, heaving of square steel pipe wallboard.As shown in Figure 6, its principle is described as follows:
A. after the concrete pressure break of circular arc diaphragm internal, concrete produces pressure to circular arc dividing plate, and circular arc dividing plate plays the effect of " arch bridge ", and circular arc dividing plate root produces thrust at springer, and this thrust makes square steel pipe wallboard tension.
B. the pressure that produces after effectively bearing most of concrete pressure break of circular arc dividing plate, the more conventional Concrete-Filled Square Steel Tube of concrete pressure being delivered to wallboard significantly reduces.
By making wallboard produce pulling force and produce the pressure being passed to wallboard after reducing concrete pressure break, the local drum that effectively can alleviate square steel pipe wallboard is bent.
The above embodiment of the present invention is not limiting the scope of the present invention; embodiments of the present invention are not limited thereto; all this kind is according to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned fundamental technics thought prerequisite; to the amendment of other various ways that said structure of the present invention is made, replacement or change, all should drop within protection scope of the present invention.
Claims (10)
1. the large footpath steel core concrete column of a built-in longitudinal baffle, comprise steel pipe and be built in the dividing plate in steel pipe, it is characterized in that: described dividing plate is N block, wherein, the quantity of N is 3 ~ 5, and N is natural number, the structure of N block dividing plate is all identical, N block dividing plate is all longitudinally arranged, namely the plate length direction of dividing plate is all consistent with the axis of steel pipe, the side edge place of N block dividing plate is connected with junction plate successively by joint fastener, and contacted with steel pipe inner wall by joint fastener, the space of a relative closure is surrounded after N block dividing plate is connected, N block dividing plate enclose in the space of covering and the space between dividing plate and steel pipe all to build and be filled with concrete, form whole steel core concrete column.
2. the large footpath steel core concrete column of built-in longitudinal baffle according to claim 1, it is characterized in that: described joint fastener is the cross section along steel shaft to setting is T-shaped T-shaped plate, T-shaped plate is by weld mutually and perpendicular transverse slat and riser form, the termination of riser is welded mutually with steel pipe inner wall, the two ends of transverse slat contact with the side edge place of adjacent two pieces of dividing plates and hold out against respectively, described junction plate parallels with the transverse slat of joint fastener, the quantity of junction plate is identical with the quantity of joint fastener, the both sides of junction plate are welded mutually with the side edge place of adjacent two pieces of dividing plates respectively, N block dividing plate after welding forms complete dividing plate skeleton.
3. the large footpath steel core concrete column of built-in longitudinal baffle according to claim 2, is characterized in that: the pipe of described steel pipe to be diameter be 1 ~ 2.5m, described steel core concrete column is cylinder.
4. the large footpath steel core concrete column of built-in longitudinal baffle according to claim 3, it is characterized in that: described dividing plate is the three pieces of arc plates in arch to steel pipe center projection, described joint fastener is three, three form three sealing wires between joint fastener and steel pipe, article three, sealing wire is by steel pipe trisection, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 120 °.
5. the large footpath steel core concrete column of built-in longitudinal baffle according to claim 3, it is characterized in that: described dividing plate is the four pieces of arc plates in arch to steel pipe center projection, described joint fastener is four, four form four sealing wires between joint fastener and steel pipe, article four, sealing wire is by the steel pipe quartering, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 90 °.
6. the large footpath steel core concrete column of built-in longitudinal baffle according to claim 3, it is characterized in that: described dividing plate is three pieces of flat boards, described joint fastener is three, three form three sealing wires between joint fastener and steel pipe, article three, sealing wire is by steel pipe trisection, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 120 °.
7. the large footpath steel core concrete column of built-in longitudinal baffle according to claim 2, is characterized in that: the square tube of described steel pipe to be catercorner length scope be 1 ~ 2.5m, described steel core concrete column is cross section is foursquare cuboid.
8. the large footpath steel core concrete column of built-in longitudinal baffle according to claim 7, it is characterized in that: described dividing plate is the four pieces of arc plates in arch to steel pipe center projection, described joint fastener is four, four form four sealing wires between joint buckle and steel pipe, article four, sealing wire is all positioned at the corner of steel pipe, and the angle between two planes formed between sealing wire adjacent between two and steel pipe center line is 90 °.
9. the large footpath steel core concrete column of the built-in longitudinal baffle according to any one of claim 1 to 8, is characterized in that: described dividing plate is steel plate, and the thickness of dividing plate is 20 ~ 50mm, and described junction plate is also steel plate, and the thickness of junction plate is 28 ~ 50mm.
10. the construction method of the large footpath steel core concrete column of the built-in longitudinal baffle as described in any one of claim 1 to 9, it is characterized in that, this construction method comprises the steps:
(1) in factory, complete the processing of steel pipe, dividing plate, joint fastener and junction plate, and complete welding between dividing plate with junction plate;
(2) welder enters steel duct and carries out joint fastener welding, and joint fastener is welded on steel pipe inner wall, and without the need at steel duct welding diaphragm;
(3) at the construction field (site), first lifting is welded with the steel pipe of joint fastener, and then lifting is welded with the dividing plate of junction plate, and static pressure dividing plate enters in steel pipe;
(4) to concreting in steel pipe, the steel core concrete column that shaping rear formation is whole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510870566.4A CN105421661A (en) | 2015-12-01 | 2015-12-01 | Large-diameter steel pipe concrete column with built-in longitudinal partition plates and construction method of large-diameter steel pipe concrete column |
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| CN201510870566.4A CN105421661A (en) | 2015-12-01 | 2015-12-01 | Large-diameter steel pipe concrete column with built-in longitudinal partition plates and construction method of large-diameter steel pipe concrete column |
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| CN105421661A true CN105421661A (en) | 2016-03-23 |
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| CN111535505A (en) * | 2020-04-28 | 2020-08-14 | 华南理工大学 | Novel hollow steel tube concrete column with arc-shaped inner steel tube |
| WO2021003859A1 (en) * | 2019-07-10 | 2021-01-14 | 中国矿业大学 | All-coral aggregate seawater concrete column with buckle-type frp spiral hooping reinforced square frp pipe |
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