CN105735561A - Multi-cavity concrete-filled steel tube column with embedded separation-type reinforced steel and construction method thereof - Google Patents
Multi-cavity concrete-filled steel tube column with embedded separation-type reinforced steel and construction method thereof Download PDFInfo
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- CN105735561A CN105735561A CN201610224343.5A CN201610224343A CN105735561A CN 105735561 A CN105735561 A CN 105735561A CN 201610224343 A CN201610224343 A CN 201610224343A CN 105735561 A CN105735561 A CN 105735561A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
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Abstract
The invention discloses a multi-cavity concrete-filled steel tube column with embedded separation-type reinforced steel and a construction method thereof.The column comprises outer side steel plates, inner side steel plates, core reinforced steel and concrete.The reinforced steel is welded or rolled and is one or a combination of two or more of i steel, H-shaped steel, steel shaped like the Chinese character 'wang' and L-type steel, the outer side steel plates and the inner side steel plates are connected in an enclosing mode to form two or more cavities, a through column body and one piece of core reinforced steel separated from the outer side steel plates and the inner side steel plates are arranged inside at least one cavity, the cavities are filled with the concrete, and horizontal partitioning plates are arranged at intervals in the height direction of the column bodies inside the cavities.The construction method includes the steps of factory cutting manufacturing, horizontal partitioning plate fixing, standard knot machining, standard knot connecting, standard knot lifting, concrete pouring and others.The quantity of components for field welding is reduced, the health and personal safety of workers are guaranteed, bad influences caused by shrinkage and creep can be reduced, and the seismic ducility and fireproof performance of the column bodies are further improved.
Description
Technical field
The present invention relates to a kind of multi-cavity steel tube concrete post and construction method thereof, particularly a kind of inside and outside multi-cavity steel tube concrete post separating reinforcing bar and construction method thereof.
Background technology
Along with City Building scale constantly increases the requirement with anti-seismic technology, the application of multi-cavity steel tube reinforced concrete structure increases sharply.Before this in order to tackle contraction that concrete exists and the cross section of the problem crept and cylinder bigger time, the problems such as the anti-pressure ability of cylinder own is not enough, ductility is not enough, to resist larger earthquake weight bearing power poor.Publication number is the huge post of tube steel reinforced concrete and construction method in the multi-lumen tube of a kind of space constraint disclosed in the Chinese patent of CN105133793A, this patent of invention is in Covered with Angles cylinder, by the vertical connecting plate in tube-in-tube and cavity by concrete separating, Special composition steel-tube construction, assume responsibility for bigger external load, inner chamber concrete is in core, concrete is provided extremely strong effect of contraction by the tube-in-tube structure of interior steel pipe and outer steel pipe composition, exocoel concrete is subject to outside steel pipe and the multiple constraint of vertical junction steel plate and core steel pipe, also the armored concrete of intracavity is played strong constraint effect.Can be seen that technological improvement direction before this is for improving concrete ability and carries out and carry out.
This method occur the problem that in actual applications
One, in order to be separated by cavity, weld too much demarcation strip in Covered with Angles cylinder, produce welding deformation excessive, welding stress is excessive, the problem of constructional difficulties, and under special circumstances, the integrated carrying ability of cylinder is likely to can not be guaranteed.
Two, owing to cavity space is limited, workman's welding job amount inside is excessive, can there is more toxic gas, under special circumstances, it is possible to the health of workman can be damaged.
Summary of the invention
It is an object of the invention to provide the multi-cavity steel tube concrete post of a kind of embedded separate type reinforcing bar and construction method thereof, solve in existing multi-cavity steel tube concrete technology, welding deformation is excessive, welding stress is excessive, welding job amount is excessive, poison crosses the technical problem that the health of multipair workman can damage, and also solves the technical problem that the integrated carrying ability of constructional difficulties and cylinder can not be guaranteed.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of multi-cavity steel tube concrete post of embedded separate type reinforcing bar, including outside plate, inner side steel plate, core reinforcing bar and concrete, described core reinforcing bar is welding or rolling, it it is I-steel, H profile steel, the combination of one or more in king's word steel or L-type steel, described outside plate and inner side steel plate enclose connection and form plural cavity, it is provided with through cylinder at least one cavity, the core reinforcing bar separated with outside plate and inner side steel plate, it is filled with concrete in described cavity, in described cavity, the short transverse along cylinder is arranged at intervals with horizontal splitter plate, the hole of core reinforcing bar traverse it is provided with mean in the middle part of described horizontal splitter plate.
In each cavity being provided with core reinforcing bar, core reinforcing bar is provided with at least one in this cavity.
The inner surface of described outside plate and/or the outer surface of inner side steel plate, through along the short transverse of cavity and/or be arranged at intervals with steel floor of putting more energy into.
Also being embedded with prefabricated reinforcing steel bar cage in described concrete, described prefabricated reinforcing steel bar cage is through hole, along the through setting of cavity or described prefabricated reinforcing steel bar cage is non-penetrating is connected to adjacent horizontal splitter plate.
Described prefabricated reinforcing steel bar cage is by indulging muscle and stirrup forms.
Described inner side steel plate includes vertical diaphragm plate and/or vertical midfeather, and every block of inner side steel plate all has at least one concrete trickling hole.
The transverse section of described prefabricated reinforcing steel bar cage is circular or polygon.
The transverse section that described outside plate surrounds is the compound section of circular, oval, polygon or above-mentioned shape.
The multi-cavity steel tube concrete post of described embedded separate type reinforcing bar, the surface of described outside plate, core reinforcing bar, horizontal splitter plate and inner side steel plate is all welded with peg.
A kind of construction method of the multi-cavity steel tube concrete post of embedded separate type reinforcing bar, construction procedure is as follows:
Step one, in factory, material piecemeal is cut into welding outside plate, inner side steel plate and horizontal splitter plate, if core reinforcing bar is welding fabrication, then it is also required to be cut into by material piecemeal the steel plate of core reinforcing bar simultaneously, if core reinforcing bar is roll forming, then module installed by the reinforcing bar being processed into core reinforcing bar along short transverse by different length specification；
Step 2, outside plate in step one and inner side steel plate are processed into multi-cavity steel tube respectively by design transverse shape, the fixing horizontal splitter plate in the inside of multi-cavity steel tube simultaneously, and in the middle part hole-opening of horizontal splitter plate, multi-cavity steel tube is processed ultimately forming multi-cavity steel tube along short transverse by different length specification and installs module；If needing core reinforcing bar is welding fabrication, then by the steel plate of the core reinforcing bar in step one by designing transverse shape, ultimately forming reinforcing bar installation module along short transverse by the processing of different length specification；
Step 3, multi-cavity steel tube is installed module and reinforcing bar and installs after module is transported to job site, multi-cavity steel tube is installed module and reinforcing bar is installed module and lifted by crane installation respectively, and the multi-cavity steel tube that aligns installs module and the center of reinforcing bar installation module, multi-cavity steel tube is installed interim connection between module and reinforcing bar installation module fixing；
Step 4, installs module by multi-cavity steel tube and reinforcing bar is installed module upper and lower split respectively and is welded into entirety.
Step 5, casting concrete in cavity, and carry out maintenance, make outside plate, inner side steel plate, core reinforcing bar and concrete connect and form overall primary structure member.
In described step 3, reinforcing bar is installed module and hangs in the cavity that multi-cavity steel tube installs module from the top of multi-cavity steel tube installation module, ensure that reinforcing bar is installed the construction height of module and installed the construction height of module lower than multi-cavity steel tube simultaneously, or multi-cavity steel tube is installed module and the top hanging sleeve of module is installed in the outside of reinforcing bar installation module from reinforcing bar, ensure that multi-cavity steel tube installs the construction height construction height lower than reinforcing bar standard knot of module simultaneously.
Also need in described step one put more energy into steel floor in factory, and will put more energy in step 2 steel floor and outside plate and/or inner side Plate Welding, collectively constitutes the multi-cavity steel tube in step 3 and installs module.
Vertical muscle and stirrup are processed in factory prefabricated reinforcing steel bar cage by described step one module is installed, and reinforcing steel bar cage installation module hung in multi-cavity steel tube installation module after step 3, be enclosed within outside reinforcing bar installation module, then fixing in cavity, last and concrete forms entirety.
In described step one, by the surface weld stud in advance of outside plate, inner side steel plate, core reinforcing bar or steel floor of putting more energy into.
Compared with prior art the invention have the characteristics that and beneficial effect:
The present invention is the multi-cavity steel tube concrete post of the diverse a kind of new embedded separate type reinforcing bar of a kind of and conventional solution steel core concrete column thinking, the core space that namely core district is strengthened in the cavity of Covered with Angles cylinder arranges the core reinforcing bar of separate type, the stress that can bear due to prismatic core reinforcing bar is far longer than reinforcing bar, not only provide bigger probability for increasing columns bearing capacity, the separate type of core reinforcing bar and encased steel plate and construction, greatly reduce workman's welding procedure amount at intracavity, decrease welding stress and welding deformation, speed of application is fast, the integrated carrying ability of cylinder is guaranteed, play the mechanical property giving full play to multi-cavity steel tube concrete.
The multi-cavity steel tube concrete post of the embedded separate type reinforcing bar of the present invention, workman need not carry out welding job in narrow and small cavity, does not reach toxic gas, it is ensured that the healthy and personal safety of workman.
The multi-cavity steel tube concrete post of the embedded separate type reinforcing bar of the present invention, core reinforcing bar, encased steel plate and concrete is enable to be in close contact in construction and serviceability limit stage, give full play to steel pipe to concrete effect of contraction, and contraction and the adverse effect brought of creeping can be reduced.
The multi-cavity steel tube concrete post of the embedded separate type reinforcing bar of the present invention, constitutes multiple cavity, is conducive to concreting, can be effectively improved the concrete stress performance of conventional steel.Inside cavity has the core reinforcing bar of separate type simultaneously, improves anti-earthquake ductility and the fire protecting performance of cylinder；Concrete reinforcing steel bar cage can also be set up in the outside of core reinforcing bar, and core reinforcing bar is indulged muscle and stirrup wraps up, it is possible to promotes anti-earthquake ductility and the fire protecting performance of cylinder further.
Fire resistance property of the present invention is strong, has multiple defence line, and after outer layer steel cylinder loses effect, core reinforcing bar and concrete still have stronger bearing capacity, deform little, should diminish, and bearing capacity is high.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is the structural representation of embodiment one.
Fig. 2 is the sectional elevation of Fig. 1.
Fig. 3 is the structural representation of embodiment two.
Fig. 4 is the sectional elevation of Fig. 3.
Fig. 5 is the structural representation of embodiment three.
Fig. 6 is the sectional elevation of Fig. 5.
Fig. 7 is the structural representation of embodiment four.
Fig. 8 is the sectional elevation of Fig. 7.
Accompanying drawing labelling: 1-outside plate, 2-core reinforcing bar, 3-cavity, 4-concrete, 5-horizontal splitter plate, 6-prefabricated reinforcing steel bar cage, 6.1-indulge muscle, 6.2-stirrup, the vertical diaphragm plate of 7-, the vertical midfeather of 8-, 9-hole.
Detailed description of the invention
Embodiment one is referring to shown in Fig. 1-2, and the multi-cavity steel tube concrete post of a kind of embedded separate type reinforcing bar, including outside plate 1, inner side steel plate, core reinforcing bar 2 and concrete, described core reinforcing bar 2 is welding H-bar.Described inner side steel plate includes two pieces of vertical diaphragm plates 7 and two pieces of vertical midfeathers 8, and every block of inner side steel plate all has at least one concrete trickling hole.Outside plate 1 and inner side steel plate enclose connection and form five cavitys 3, respectively four loculuses and a big chamber.Concrete 4 it is filled with in described cavity.
In four loculuses, it is provided with through cylinder, the core reinforcing bar 2 separated with outside plate and inner side steel plate in each cavity, in a big chamber, is provided with two core reinforcing bars 2.
In described cavity 3, the short transverse along cylinder is arranged at intervals with horizontal splitter plate 5, is provided with mean for the hole 9 of core reinforcing bar 2 traverse in the middle part of described horizontal splitter plate 5.Horizontal splitter plate 5 arranges at least one of which at same position, and the present embodiment is two-layer, and the common position that arranges is at floor position, and the setting of horizontal splitter plate is in addition to play and is additionally operable to connect horizontal member to outside the antitorque effect of Covered with Angles cylinder.
Further, the outer surface, through along the short transverse of cavity and/or be arranged at intervals with steel floor of putting more energy into of the inner surface of described outside plate and/or inner side steel plate.
Further, the column section area of the multi-cavity steel tube concrete post of described embedded separate type reinforcing bar is more than 1 square metre.
Further, in order to increase concrete bond stress, the surface of described outside plate 1, core reinforcing bar 2, horizontal splitter plate 5 and inner side steel plate is all welded with peg.
Further, described concrete label is not less than C30.
Further, the compound section that transverse section is rectangle that described outside plate 1 surrounds, can also be the compound section of circular, oval, polygon or above-mentioned shape in other embodiments.
Embodiment two, shown in Fig. 3-4, with embodiment one the difference is that, outside plate 1 and inner side steel plate enclose connection formed six cavitys 3, respectively six loculuses.Concrete 4 it is filled with in described cavity.Cylinder, the core reinforcing bar 2 separated with outside plate and inner side steel plate it is provided with through in each cavity.
Also being embedded with prefabricated reinforcing steel bar cage 6 in described concrete 4, described prefabricated reinforcing steel bar cage 6 is non-penetrating to be connected between adjacent horizontal splitter plate 2.In other embodiments, prefabricated reinforcing steel bar cage 6 can also pass hole 9, along the through setting of cavity.
Described prefabricated reinforcing steel bar cage is by indulging muscle 6.1 and stirrup 6.2 forms.
Further, the transverse section of described prefabricated reinforcing steel bar cage 5 is rectangle, can also be circular or other polygon in other embodiments.
Embodiment three referring to shown in Fig. 5-6, with embodiment one the difference is that, outside plate 1 and inner side steel plate enclose connection and form two cavitys 3, respectively a loculus and a big chamber.Concrete 4 it is filled with in described cavity.Each little intracavity is provided with through cylinder, the core reinforcing bar 2 separated with outside plate and inner side steel plate, in a big chamber, is provided with four core reinforcing bars 2.Described core reinforcing bar 2 is welding L-type steel.
Embodiment four referring to shown in Fig. 7-8, with embodiment two the difference is that, described core reinforcing bar 2 is welding L-type steel, and the transverse section of described reinforcing steel bar cage 5 be circle.
The construction method of the multi-cavity steel tube concrete post of this embedded separate type reinforcing bar, construction procedure is as follows:
Step one, in factory, material piecemeal is cut into welding outside plate 1, inner side steel plate and horizontal splitter plate 5, if core reinforcing bar 2 is welding fabrication, then it is also required to be cut into by material piecemeal the steel plate of core reinforcing bar 2 simultaneously, if core reinforcing bar 2 is roll forming, then module installed by the reinforcing bar being processed into core reinforcing bar 2 along short transverse by different length specification；
Step 2, outside plate 1 in step one and inner side steel plate are processed into multi-cavity steel tube respectively by design transverse shape, the fixing horizontal splitter plate 5 in the inside of multi-cavity steel tube simultaneously, and in the middle part hole-opening 9 of horizontal splitter plate 5, multi-cavity steel tube is processed ultimately forming multi-cavity steel tube along short transverse by different length specification and installs module；If needing core reinforcing bar 2 for welding fabrication, then by the steel plate of the core reinforcing bar 2 in step one by designing transverse shape, ultimately forming reinforcing bar installation module along short transverse by the processing of different length specification；
Step 3, multi-cavity steel tube is installed module and reinforcing bar and installs after module is transported to job site, multi-cavity steel tube is installed module and reinforcing bar is installed module and lifted by crane installation respectively, and the multi-cavity steel tube that aligns installs module and the center of reinforcing bar installation module, multi-cavity steel tube is installed interim connection between module and reinforcing bar installation module fixing；
Step 4, installs module by multi-cavity steel tube and reinforcing bar is installed module upper and lower split respectively and is welded into entirety.
Step 5, casting concrete 4 in cavity 3, and carry out maintenance, make outside plate 1, inner side steel plate, core reinforcing bar 2 and concrete 4 connect and form overall primary structure member.
Further, in work progress, reinforcing bar is installed module and hangs in the cavity that multi-cavity steel tube installs module from the top of multi-cavity steel tube installation module, ensure that reinforcing bar is installed the construction height of module and installed the construction height of module lower than multi-cavity steel tube simultaneously, or multi-cavity steel tube is installed module and the top hanging sleeve of module is installed in the outside of reinforcing bar installation module from reinforcing bar, ensure that multi-cavity steel tube installs the construction height construction height lower than reinforcing bar standard knot of module simultaneously.
As arranged steel floor of putting more energy into, then need also to put more energy in the factory in step one steel floor, and will put more energy in step 2 steel floor and outside plate and/or inner side Plate Welding, collectively constitutes the multi-cavity steel tube in step 3 and installs module.
Reinforcing steel bar cage 6 can also be added in concrete, further enhance concrete bearing capacity.Vertical muscle 6.1 and stirrup 6.2 are processed in factory prefabricated reinforcing steel bar cage by described step one module is installed, and reinforcing steel bar cage installation module hung in multi-cavity steel tube installation module after step 3, be enclosed within outside reinforcing bar installation module, then fixing in cavity, last and concrete 4 forms entirety.
For the bond stress of Concrete Structure, in described step one, by the surface weld stud in advance of outside plate 1, inner side steel plate, core reinforcing bar 2 or steel floor of putting more energy into.
Claims (14)
1. the multi-cavity steel tube concrete post of an embedded separate type reinforcing bar, it is characterized in that: include outside plate (1), inner side steel plate, core reinforcing bar (2) and concrete, described core reinforcing bar (2) is welding or rolling, it it is I-steel, H profile steel, the combination of one or more in king's word steel or L-type steel, described outside plate (1) and inner side steel plate enclose connection and form plural cavity (3), it is provided with through cylinder at least one cavity, the core reinforcing bar (2) separated with outside plate and inner side steel plate, concrete (4) it is filled with in described cavity, in described cavity (3), the short transverse along cylinder is arranged at intervals with horizontal splitter plate (5), described horizontal splitter plate (5) middle part is provided with mean for the hole (9) of core reinforcing bar (2) traverse.
2. the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 1, it is characterised in that: in each cavity being provided with core reinforcing bar, core reinforcing bar is provided with at least one in this cavity.
3. the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 1 and 2, it is characterised in that: the inner surface of described outside plate and/or the outer surface of inner side steel plate, through along the short transverse of cavity and/or be arranged at intervals with steel floor of putting more energy into.
4. the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 1 and 2, it is characterized in that: be also embedded with prefabricated reinforcing steel bar cage (6) in described concrete (4), described prefabricated reinforcing steel bar cage (6) is through hole (9), along the through setting of cavity or described prefabricated reinforcing steel bar cage (6) is non-penetrating is connected to adjacent horizontal splitter plate (2).
5. the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 4, it is characterised in that: described prefabricated reinforcing steel bar cage is by indulging muscle (6.1) and stirrup (6.2) forms.
6. the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 1, it is characterised in that: described inner side steel plate includes vertical diaphragm plate (7) and/or vertical midfeather (8), and every block of inner side steel plate all has at least one concrete trickling hole.
7. the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 5, it is characterised in that: the transverse section of described prefabricated reinforcing steel bar cage (5) is circular or polygon.
8. the multi-cavity steel tube concrete post of the embedded separate type reinforcing bar stated according to claim 1, it is characterised in that: the transverse section that described outside plate (1) surrounds is the compound section of circular, oval, polygon or above-mentioned shape.
9. the multi-cavity steel tube concrete post of the embedded separate type reinforcing bar according to claim 1,6 or 8, it is characterised in that: the surface of described outside plate (1), core reinforcing bar (2), horizontal splitter plate (5) and inner side steel plate is all welded with peg.
10. the construction method of the multi-cavity steel tube concrete post of the embedded separate type reinforcing bar as described in claim 1-9 any one, it is characterised in that construction procedure is as follows:
Step one, in factory, material piecemeal is cut into welding outside plate (1), inner side steel plate and horizontal splitter plate (5), if core reinforcing bar (2) is welding fabrication, then it is also required to be cut into by material piecemeal the steel plate of core reinforcing bar (2) simultaneously, if core reinforcing bar (2) is roll forming, then module installed by the reinforcing bar being processed into core reinforcing bar (2) along short transverse by different length specification；
Step 2, outside plate (1) in step one and inner side steel plate are processed into multi-cavity steel tube respectively by design transverse shape, the fixing horizontal splitter plate (5) in the inside of multi-cavity steel tube simultaneously, and in the middle part hole-opening (9) of horizontal splitter plate (5), multi-cavity steel tube is processed ultimately forming multi-cavity steel tube along short transverse by different length specification and installs module；If needing core reinforcing bar (2) is welding fabrication, then by the steel plate of the core reinforcing bar (2) in step one by designing transverse shape, ultimately forming reinforcing bar installation module along short transverse by the processing of different length specification；
Step 3, multi-cavity steel tube is installed module and reinforcing bar and installs after module is transported to job site, multi-cavity steel tube is installed module and reinforcing bar is installed module and lifted by crane installation respectively, and the multi-cavity steel tube that aligns installs module and the center of reinforcing bar installation module, multi-cavity steel tube is installed interim connection between module and reinforcing bar installation module fixing；
Step 4, installs module by multi-cavity steel tube and reinforcing bar is installed module upper and lower split respectively and is welded into entirety；
Step 5, casting concrete (4) in cavity (3), and carry out maintenance, make outside plate (1), inner side steel plate, core reinforcing bar (2) and concrete (4) connect and form overall primary structure member.
11. the construction method of the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 10, it is characterized in that: in described step 3, reinforcing bar is installed module and hangs in the cavity that multi-cavity steel tube installs module from the top of multi-cavity steel tube installation module, ensure that reinforcing bar is installed the construction height of module and installed the construction height of module lower than multi-cavity steel tube simultaneously, or multi-cavity steel tube is installed module and the top hanging sleeve of module is installed in the outside of reinforcing bar installation module from reinforcing bar, ensure that multi-cavity steel tube installs the construction height construction height lower than reinforcing bar standard knot of module simultaneously.
12. the construction method of the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 10, it is characterized in that: also need in described step one put more energy into steel floor in factory, and will put more energy in step 2 steel floor and outside plate and/or inner side Plate Welding, collectively constitute the multi-cavity steel tube in step 3 and module is installed.
13. the construction method of the multi-cavity steel tube concrete post of embedded separate type reinforcing bar according to claim 10, it is characterized in that: vertical muscle (6.1) and stirrup (6.2) are processed in factory prefabricated reinforcing steel bar cage by described step one module is installed, and reinforcing steel bar cage installation module hung in multi-cavity steel tube installation module after step 3, be enclosed within outside reinforcing bar installation module, then fixing in cavity, last and concrete (4) forms entirety.
14. the construction method of the multi-cavity steel tube concrete post of the embedded separate type reinforcing bar according to claim 10 or 12, it is characterized in that: in described step one, by the surface weld stud in advance of outside plate (1), inner side steel plate, core reinforcing bar (2) or steel floor of putting more energy into.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610224343.5A CN105735561A (en) | 2016-04-12 | 2016-04-12 | Multi-cavity concrete-filled steel tube column with embedded separation-type reinforced steel and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610224343.5A CN105735561A (en) | 2016-04-12 | 2016-04-12 | Multi-cavity concrete-filled steel tube column with embedded separation-type reinforced steel and construction method thereof |
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| CN106351257A (en) * | 2016-10-14 | 2017-01-25 | 北京工业大学 | Built-in separation plate prefabricated separate post for underground structure |
| CN109025062A (en) * | 2018-08-24 | 2018-12-18 | 西安建筑科技大学 | A kind of abnormity Multi-cavity steel-concrete combination column |
| CN110714528A (en) * | 2019-10-21 | 2020-01-21 | 北京工业大学 | Giant square concrete-filled steel tube member with composite structure |
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Application publication date: 20160706 |