CN108179841A - A kind of novel concrete-filled steel square tubular column and its construction method - Google Patents
A kind of novel concrete-filled steel square tubular column and its construction method Download PDFInfo
- Publication number
- CN108179841A CN108179841A CN201810122084.4A CN201810122084A CN108179841A CN 108179841 A CN108179841 A CN 108179841A CN 201810122084 A CN201810122084 A CN 201810122084A CN 108179841 A CN108179841 A CN 108179841A
- Authority
- CN
- China
- Prior art keywords
- steel
- concrete
- square
- reinforcing bar
- tubular column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a kind of novel concrete-filled steel square tubular column and its construction methods, the novel concrete-filled steel square tubular column is put more energy into reinforcing bar, steel plate and concrete including built-in transverse, steel plate is surrounded by square steel tube, built-in transverse put more energy into reinforcing bar according to different diameters and arrangement spacing be welded in four inner walls of square steel tube, Concrete Filled is inside square steel tube.The design of the present invention strengthens the rigidity of steel pipe tube wall, the bond effect of steel and two kinds of materials of concrete is strengthened simultaneously, reinforcing bar square steel tube of putting more energy into is enhanced to core concrete effect of contraction, delay the sliding of core concrete and steel pipe partial buckling, make steel pipe and concrete is closely linked co-operation, effectively improve the ultimate bearing capacity and ductility of component, the form simple structure, it is cost-effective, there is higher engineering application value.
Description
Technical field
The present invention relates to a kind of novel concrete-filled steel square tubular column and its construction methods.
Background technology
Concrete filled steel tube is formed by the combination of materials of two kinds of different performances of steel and concrete, in loading process respectively
Itself loading characteristic is played, is complemented one another, is brought out the best in each other.The constraint that outside steel pipe can effectively improve to inner concrete is made
With, and concrete is under the action of steel pipe sidewise restraint, it is more preferable so as to play concrete preferably in three dimension stress state
Compressive property；Simultaneously because the presence of steel pipe, concrete saves shuttering supporting expense in perfusion, improves construction speed
Degree, so as to shorten the duration, whole structural stability is good, remarkable in economical benefits.
A large amount of achievement in research also indicates that steel pipe is preferable to the binding effect of core concrete in circular cross-section, but deficiency
Place is that circular cross-section column and the design of section steel beam or armored concrete beam connecting node are complex, and are not easy to construct, and side
Since its cross sectional shape is regular, the simple structure especially when designing bean column node is easy to construct steel core concrete column, thus right
The achievement in research and engineer application of Concrete Filled Square Steel Tubular are increasingly extensive.
In concrete-filled steel square tubular column, folding corner region is stronger to the restriction ability of concrete, the middle area on four side of square steel tube
Domain is weak to the restriction ability of core concrete.It should further adopt an effective measure and be strengthened.
Invention content
Based in concrete-filled steel square tubular column section, folding corner region is stronger to the restriction ability of concrete, four side of square steel tube
Intermediate region this feature weak to the restriction ability of core concrete, set on the inside of steel pipe walls in concrete-filled steel square tubular column horizontal
To reinforcing bar of putting more energy into, to strengthen restriction ability of the square steel tube to core concrete, strengthen the local stability performance of square steel tube wall, carry
Height is put more energy into the adhesive property of square steel tube wall and concrete, so as to promote the ultimate bearing capacity of concrete-filled steel square tubular column and deformation energy
Power.
The present invention provides a kind of novel concrete-filled steel square tubular column, put more energy into reinforcing bar, steel plate and concrete including built-in transverse,
Steel plate is surrounded by square steel tube, and built-in transverse reinforcing bar of putting more energy into is welded in four inner walls of square steel tube according to different diameters and arrangement spacing,
The rigidity of steel pipe tube wall is strengthened, Concrete Filled is inside square steel tube.
Built-in transverse reinforcing bar of putting more energy into laterally is welded on square steel inside pipe wall.
Preferably, the put more energy into length of reinforcing bar of built-in transverse is less than the width of square steel tube, and built-in transverse is put more energy into the length of reinforcing bar
Account for about more than 90% width of square steel tube.
Preferably, the built-in transverse is put more energy into a diameter of 4mm~8mm of reinforcing bar.
Preferably, adjacent built-in transverse puts more energy into and is divided into 50mm~100mm between reinforcing bar on the same face steel plate.
Preferably, the concrete uses strength grade as the concrete of C25-C40, in the materials for pouring into a mould concrete, in
Sand, the maximum particle of crushed stone 20mm.The ratio of mud of concrete is 0.38.
It is furthermore preferred that the steel plate material is Q235, reinforcing bar HPB335.
It is furthermore preferred that the steel plate thickness is 4mm or 6mm, adjacent built-in transverse is put more energy into bar spacing on the same face steel plate
For 50mm, 75mm or 100mm, built-in transverse puts more energy into bar diameter as 4mm, 6mm or 8mm, cross section geometry for 200mm ×
200mm, draw ratio L/D=3；Steel plate material is Q235B, reinforcing bar HPB335；Using C25-C40 Concrete Filleds.
It is another object of the present invention to provide a kind of construction method of novel concrete-filled steel square tubular column, including walking as follows
Suddenly：
Step 1: the preparation of built-in transverse reinforcing bar square steel tube：First, in accordance with steel plate design measure, it is every to get out welding
The four blocks of steel plates and reinforcing bar of a rectangular steel tube are later welded together reinforcing bar level with steel plate by different designs spacing, most
Afterwards four blocks of steel plates are welded to form square section, ensure to be welded with the steel plate one side of transverse steel on the inside of square steel tube, while pre-
Steel plate sample and reinforcing bar sample are stayed to carry out material property testing；
Step 2：Concrete batching；
Step 3：Square steel tube prepared by step 1 is positioned over horizontal plane, the concrete that step 2 is prepared is from square steel tube
Top is fed into square steel tube, while using pervibration, is made its closely knit, formed concrete-filled steel square tubular column；
Step 4：Concrete-filled steel square tubular column made from step 3 is placed to concrete initial set, is transported to indoor progress
Natural curing.
In step 4 simultaneously, cube concrete test specimen is processed using concrete test die, is measured for material property testing.
The natural curing step is the conventional means of this field, specially at normal temperatures (temperature on average is not less than+5 degree)
Using appropriate material oversite concrete, and the maintenance that the measures such as watering wetting, windproof anti-dry, heat-preserving anti-freezing is taken to be carried out.
The mechanical property of novel concrete-filled steel square tubular column mainly includes the research of axial bearing property and adhesive property.
Axial compression test studies the damage -form and force-mechanism of Main Analysis test specimen；Shaft pressuring load-deformation curve is carried out
The mechanical performance indexs such as ultimate axial compressive strength are analyzed in comparative analysis, and research lateral stiffening reinforcing bar is to effect of contraction
Promote effect.
Push out test studies concrete-filled steel square tubular column and the bond-slip of transverse steel rib concrete-filled steel square tubular column is configured
Can, load-slip curve is analyzed, comparative test result data provide foundation for theory analysis from now on and engineer application.
(1) it is less to the research of built-in lateral stiffening reinforcing bar concrete-filled steel square tubular column at present, particularly other side's steel tube concrete
The basic mechanical performance research of lateral stiffening reinforcing bar concrete-filled steel square tubular column is set to be not yet reported that both at home and abroad in soil.Built-in transverse
Reinforcing bar Concrete-Filled Square Steel Tube of putting more energy into construction can be effectively prevented from concrete filled steel tube occurs in loading process local buckling with
The sliding that concrete generates.
(2) lateral stiffening reinforcing bar is studied by the diameter of built-in transverse reinforcing bar, the arrangement influence factors such as spacing and quantity
Square steel tube analyses in depth between three kinds of lateral stiffening reinforcing bar, square steel tube and core concrete materials the effect of contraction of concrete
Interaction relationship, provide theoretical and test basis to rationally design built-in transverse reinforcing bar Concrete-Filled Square Steel Tube component of putting more energy into.
(3) contrastive analysis built-in transverse, which is put more energy into, reinforcing bar Concrete-Filled Square Steel Tube component and does not set the square steel tube coagulation of reinforcing bar
Native component damage -form, difference on stress performance under Structure Under Axial Compression, so as to extend Concrete Filled Square Steel Tubular and component
Research and application field.
Transverse steel is according to different diameters and arranges spacing, is welded in square steel inside pipe wall, strengthens the rigidity of steel pipe tube wall,
The bond effect of steel and two kinds of materials of concrete is strengthened simultaneously, enhances reinforcing bar square steel tube of putting more energy into and core concrete is constrained and make
With delaying the sliding of core concrete and steel pipe partial buckling, make steel pipe and concrete is closely linked co-operation, have
Effect ground improves the ultimate bearing capacity and ductility of component, and the form simple structure is cost-effective, has higher engineer application valency
Value.
Description of the drawings
The Figure of description for forming the part of the present invention is used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation do not constitute improper limitations of the present invention for explaining the present invention.
Fig. 1 is that common square steel tube divides figure to the constraint of core concrete in the prior art；
Fig. 2 is a kind of novel concrete-filled steel square tubular column stereogram provided by the invention；
Fig. 3 is a kind of novel concrete-filled steel square tubular column cross-sectional view provided by the invention；
Wherein, 1- steel plates, 2- built-in transverses are put more energy into reinforcing bar, 3- concrete.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the present invention.It is unless another
It indicates, all technical and scientific terms used herein has usual with general technical staff of the technical field of the invention
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to exemplary embodiments of the present invention.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or combination thereof.
As shown in Figure 1, in ordinary square concrete-filled steel, folding corner region is stronger to the restriction ability of concrete, square steel
The intermediate region on four side of pipe is weak to the restriction ability of core concrete.In order to strengthen constraint energy of the square steel tube to core concrete
Power strengthens the local stability performance of square steel tube wall, improves the adhesive property of put more energy into square steel tube wall and concrete, so as to promote square steel
The ultimate bearing capacity and deformability of pipe concrete column, the present invention provide a kind of novel concrete-filled steel square tubular column and its construction party
Method.
Embodiment 1：
A kind of novel concrete-filled steel square tubular column as shown in Figures 2 and 3, is put more energy into reinforcing bar 2, steel plate 1 and mixed including built-in transverse
Solidifying soil 3, steel plate are surrounded by square steel tube, and built-in transverse reinforcing bar of putting more energy into laterally is welded in four inner walls of square steel tube, and Concrete Filled is in side
Steel duct.
The put more energy into length of reinforcing bar of built-in transverse is less than the width of square steel tube, and the put more energy into length of reinforcing bar of built-in transverse accounts for about square steel
More than 90% width of pipe.
Adjacent built-in transverse puts more energy into and is divided into 50mm~100mm between reinforcing bar on the same face steel plate.
Wherein concrete uses strength grade as the concrete of C25, C30 or C40, in the materials for pouring into a mould concrete, middle sand,
The maximum particle of crushed stone is 20mm.The ratio of mud of concrete is 0.38, to accelerate the setting rate of concrete, is added in concrete
Early strength agent and water-reducing agent.
Steel plate material is Q235B, reinforcing bar HPB335.
Embodiment 2：
A kind of test specimen of novel concrete-filled steel square tubular column, test specimen are divided into two groups, and first group (A groups) totally 8 test specimens are respectively
The built-in transverse that the common Concrete-Filled Square Steel Tube test specimen that steel plate thickness is 4mm 2 and steel plate thickness are 4mm is put more energy into reinforcing bar square steel tube
Concrete sample 6 (lateral stiffening bar spacing is respectively 50mm, 75mm and 100mm, and lateral stiffening reinforcing bar length is 180mm,
Bar diameter is respectively 4mm and 6mm), cross section geometry is 200mm × 200mm, the draw ratio L/D=3 of test specimen, and test specimen is high
It spends for 600mm.Second group (B groups) totally 11 test specimens are the common Concrete-Filled Square Steel Tube test specimen 2 that steel plate thickness is 6mm respectively
Putting more energy into built-in transverse that steel plate thickness is 6mm, (lateral stiffening bar spacing is respectively respectively reinforcing bar concrete-filled steel square tubular column 9
50mm, 75mm and 100mm, bar diameter are respectively 4mm, 6mm and 8mm), cross section geometry be 200mm × 200mm, test specimen
Draw ratio L/D=3, height of specimen 600mm.Whole test specimen steel plate materials are Q235B, reinforcing bar HPB335.
Embodiment 3：
A kind of construction method of novel concrete-filled steel square tubular column, includes the following steps：
Step 1: the preparation of built-in transverse reinforcing bar square steel tube：First, in accordance with steel plate design measure, it is every to get out welding
The reinforcing bar that the four blocks of steel plates and length of a rectangular steel tube are 180mm, later by different designs spacing by reinforcing bar is horizontal and steel plate
Weld together, finally weld to form square section by four blocks of steel plates, ensure to be welded with the steel plate one side of transverse steel in square steel
On the inside of pipe, while steel plate sample and reinforcing bar sample are reserved to carry out material property testing.
Step 2：Concrete batching；
Step 3：Square steel tube prepared by step 1 is positioned over horizontal plane, the concrete that step 2 is prepared is from square steel tube
Top is fed into square steel tube, while uses internal vibration stick pervibration, makes its closely knit, forms concrete-filled steel square tubular column；
Step 4：Concrete-filled steel square tubular column made from step 3 is placed to concrete initial set, is transported to indoor progress
Natural curing, (temperature on average is not less than+5 degree) use appropriate material oversite concrete under room temperature, and take watering wetting, anti-
The maintenance that the measures such as wind is prevented doing, heat-preserving anti-freezing are carried out, while cube concrete test specimen is processed using concrete test die, it is used for
Material property testing measures.
Embodiment 4：
Material mechanical performance experiment measures the research for including axial bearing property and adhesive property promotion effect.
Axial bearing property is tested：
Put more energy into 6 built-in transverses of A groups in embodiment 2 reinforcing bar Concrete-Filled Square Steel Tube and 1 common Concrete-Filled Square Steel Tube it is short
Column (promoting effect for contrast properties) carries out axial compression test.Review and analyse the damage -form and force-mechanism of test specimen；To axis
Pressure load-deformation curve compares and analyzes, and the mechanical performance indexs such as ultimate axial compressive strength are analyzed, and research laterally adds
Strength reinforcing bar is to the promotion effect of effect of contraction.
The narration of experiment process is provided.
Experiment is loaded on YAW-3000A electronic-hydraulic servo pressure testing machines and is completed.Loading is by the way of hierarchical loading.Add
Load initial stage, every grade of loaded value about estimate the 20% of ultimate load, and classification is gradually loaded into steel pipe and reaches yield strength, works as loading
After being loaded onto estimate ultimate load value 85%, slowly continuous loading is destroyed until test specimen reaches capacity bearing capacity.Meanwhile it is
Ensure that deformation of the test specimen under axial compressive force effect can fully develop and reach stable, after the completion of every grade of load applies, often
The grade residence time is no less than 2 minutes, while observe, analyze test piece deformation and record the data such as displacement, strain.
Experimental result：Test specimen axis presses parameter and axial bearing property, and test result is as follows shown in table：
Specimen test is pressed by axis, comparative analysis stiffening construction promotes effect to the bearing capacity of Concrete-Filled Square Steel Tube：
1. it is found by the put more energy into analysis of the axial bearing property test result of reinforcing bar concrete-filled steel square tubular column of built-in transverse, axis pressure
Ultimate bearing capacity can improve 2.3%~13.1% compared with ordinary square concrete-filled steel.
2. it is found by visual inspection：In load ascent stage, due to the effect of lateral stiffening reinforcing bar, built-in transverse is put more energy into
The transversely deforming of reinforcing bar concrete-filled steel square tubular column is respectively less than the transversely deforming of ordinary square concrete-filled steel.
3. in steel using amount increase under the same conditions, reducing lateral stiffening bar spacing more can be effective than increase bar diameter
Built-in transverse is improved to put more energy into the bearing capacity of reinforcing bar concrete-filled steel square tubular column.In practical implementation, it should pay the utmost attention to pass through reduction
The measure of transverse steel arrangement spacing is put more energy into the ultimate bearing capacity of reinforcing bar concrete-filled steel square tubular column to improve built-in transverse.
Embodiment 5：
Test about Bond Strength：
Reinforcing bar Concrete-Filled Square Steel Tube of putting more energy into 1 Concrete-Filled Square Steel Tube test specimen of B groups in embodiment 2 and 6 built-in transverses tries
Part carries out push out test, studies concrete-filled steel square tubular column and the bond-slip of transverse steel rib concrete-filled steel square tubular column is configured
Can, load-slip curve is analyzed, comparative test result data provide foundation for theory analysis from now on and engineer application.
Experiment process is as follows：
Push out test uses YAW-3000A type electronic-hydraulic servo pressure testing machines.Loading is using hierarchical loading, loading speed control
For system in 200N/s, every grade of load applies holds lotus 2 minutes when finishing, apparent non-when occurring between square steel tube and core concrete
After linear slide, loading velocity is improved to 300N/s, continuous Slow loading to test specimen destroys.
Experimental result：It is as shown in the table for adhesive property test result：
| Test specimen is numbered | D*B(mm) | t(mm) | l(mm) | Steel bar arrangement situation | Adhesion strength (MPa) |
| 1 | 150*150 | 4 | 480 | Without muscle | 0.27 |
| 2 | 150*150 | 4 | 480 | Arrangement of reinforcement Φ 4, s=100 | 1.12 |
| 3 | 150*150 | 4 | 480 | Arrangement of reinforcement Φ 4, s=75 | 1.25 |
| 4 | 150*150 | 4 | 480 | Arrangement of reinforcement Φ 4, s=50 | 1.43 |
| 5 | 150*150 | 6 | 480 | Arrangement of reinforcement Φ 4, s=100 | 1.29 |
| 6 | 150*150 | 4 | 430 | Arrangement of reinforcement Φ 4, s=100 | 1.15 |
| 7 | 100*100 | 4 | 480 | Arrangement of reinforcement Φ 4, s=100 | 1.39 |
It bonds resistant slide aspect of performance and promotes effect：
1. a certain number of transverse steels are set on the inner wall of square steel tube surrounding, by changing the spacing of transverse steel,
The degree of roughness of square steel inside pipe wall is improved, so as to promote steel pipe and concrete contact interface adhesive property.
2. the adhesion strength τ of common Concrete-Filled Square Steel Tube in researchuFor 0.27MPa, built-in transverse square steel tube of putting more energy into mixes
Coagulate the adhesion strength τ of soiluFor 1.12~1.39MPa, built-in transverse put more energy into Concrete-Filled Square Steel Tube test specimen adhesion strength it is significantly big
In common Concrete-Filled Square Steel Tube test specimen.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of novel concrete-filled steel square tubular column, which is characterized in that it puts more energy into reinforcing bar, steel plate and concrete including built-in transverse, steel
Plate is surrounded by square steel tube, and built-in transverse reinforcing bar of putting more energy into is welded in four inner walls of square steel tube according to different diameters and arrangement spacing, mixes
Solidifying soil is filled in inside square steel tube.
2. a kind of novel concrete-filled steel square tubular column according to claim 1, which is characterized in that the built-in transverse is put more energy into steel
Muscle is laterally welded on square steel inside pipe wall.
3. a kind of novel concrete-filled steel square tubular column according to claim 2, which is characterized in that the built-in transverse is put more energy into steel
The length of muscle be less than square steel tube width, built-in transverse put more energy into reinforcing bar length account for square steel tube width more than 90%.
4. a kind of novel concrete-filled steel square tubular column according to claim 3, which is characterized in that the built-in transverse is put more energy into steel
A diameter of 4mm~8mm of muscle.
5. a kind of novel concrete-filled steel square tubular column according to claim 4, which is characterized in that in adjacent on the same face steel plate
It puts and is divided into 50mm~100mm between lateral stiffening reinforcing bar.
6. a kind of novel concrete-filled steel square tubular column according to claim 5, which is characterized in that the concrete uses intensity
Grade is the concrete of C25-C40.
7. a kind of novel concrete-filled steel square tubular column according to claim 6, which is characterized in that the steel plate material is
Q235, reinforcing bar HPB335.
8. a kind of novel concrete-filled steel square tubular column according to claim 7, which is characterized in that the steel plate thickness is 4mm
Or 6mm, adjacent built-in transverse puts more energy into bar spacing as 50mm, 75mm or 100mm on the same face steel plate, and built-in transverse is put more energy into reinforcing bar
A diameter of 4mm, 6mm or 8mm, cross section geometric dimension are 200mm × 200mm, draw ratio L/D=3；Steel plate material is Q235B,
Reinforcing bar is HPB335；Using C25-C40 Concrete Filleds.
9. a kind of novel concrete-filled steel square tubular column construction method, which is characterized in that include the following steps：
Step 1: the preparation of built-in transverse reinforcing bar square steel tube：First, in accordance with steel plate design measure, it is ready to weld each side
The four blocks of steel plates and reinforcing bar of shape steel pipe are later welded together reinforcing bar level with steel plate by different designs spacing, finally will
Four blocks of steel plates weld to form square section, ensure to be welded with the steel plate one side of transverse steel on the inside of square steel tube, while reserved steel
Plate sample and reinforcing bar sample are to carry out material property testing；
Step 2：Concrete batching；
Step 3：Square steel tube prepared by step 1 is positioned over horizontal plane, by the concrete that step 2 is prepared at the top of square steel tube
It is fed into square steel tube, while using pervibration, makes its closely knit, form concrete-filled steel square tubular column；
Step 4：Concrete-filled steel square tubular column made from step 3 is placed to concrete initial set, is transported to indoor carry out nature
Maintenance.
10. a kind of novel concrete-filled steel square tubular column construction method according to claim 9, which is characterized in that in step 4
Cube concrete test specimen is processed simultaneously, is measured for material property testing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810122084.4A CN108179841A (en) | 2018-02-07 | 2018-02-07 | A kind of novel concrete-filled steel square tubular column and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810122084.4A CN108179841A (en) | 2018-02-07 | 2018-02-07 | A kind of novel concrete-filled steel square tubular column and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108179841A true CN108179841A (en) | 2018-06-19 |
Family
ID=62552319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810122084.4A Withdrawn CN108179841A (en) | 2018-02-07 | 2018-02-07 | A kind of novel concrete-filled steel square tubular column and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108179841A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608415A (en) * | 2020-05-13 | 2020-09-01 | 武汉大学 | Square steel tube concrete column reinforcing method based on high-ductility cement-based material |
| CN114991389A (en) * | 2022-06-28 | 2022-09-02 | 华南理工大学 | Square steel tube concrete column and manufacturing method thereof |
| CN117127755A (en) * | 2023-09-25 | 2023-11-28 | 中南大学 | Bamboo-like outer constraint support tube concrete column |
-
2018
- 2018-02-07 CN CN201810122084.4A patent/CN108179841A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608415A (en) * | 2020-05-13 | 2020-09-01 | 武汉大学 | Square steel tube concrete column reinforcing method based on high-ductility cement-based material |
| CN111608415B (en) * | 2020-05-13 | 2021-07-06 | 武汉大学 | Square steel tube concrete column reinforcing method based on high-ductility cement-based material |
| CN114991389A (en) * | 2022-06-28 | 2022-09-02 | 华南理工大学 | Square steel tube concrete column and manufacturing method thereof |
| CN114991389B (en) * | 2022-06-28 | 2024-01-19 | 华南理工大学 | Square steel tube concrete column and manufacturing method thereof |
| CN117127755A (en) * | 2023-09-25 | 2023-11-28 | 中南大学 | Bamboo-like outer constraint support tube concrete column |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Le Hoang et al. | Experimental study on structural performance of UHPC and UHPFRC columns confined with steel tube | |
| Guo et al. | Behavior of axially loaded circular stainless steel tube confined concrete stub columns | |
| Yang et al. | Compressive behavior of T-shaped concrete filled steel tubular columns | |
| Peyvandi et al. | Enhancement of the structural efficiency and performance of concrete pipes through fiber reinforcement | |
| CN108179841A (en) | A kind of novel concrete-filled steel square tubular column and its construction method | |
| CN104963415B (en) | A kind of round steel pipe binding type steel concrete column and steel beam joint structure | |
| Yang et al. | Experiments on rectangular concrete-filled steel tubes loaded axially on a partially stressed cross-sectional area | |
| Zhang et al. | Seismic behavior of composite shear walls incorporating high-strength materials and CFST boundary elements | |
| Trujillo et al. | Bond strength of reinforcing bars encased with shotcrete | |
| CN109629523A (en) | A kind of steel plate and concrete composite panel earth and rockfill dam and its construction method | |
| Akinyemi et al. | Repair and strengthening of bamboo reinforced acrylic polymer modified square concrete columns using ferrocement jackets | |
| Gulec et al. | Experimental investigation of flexural performance of T-section prefabricated cage reinforced beams with self-compacting concrete | |
| WO2005116357A2 (en) | Concrete reinforcement apparatus and method | |
| Kim et al. | Pile foundation design through the increased bearing capacity of extended end pile | |
| Azzawi et al. | Experimental investigation of steel fiber RC hollow columns under eccentric loading | |
| Wang et al. | Experimental study of interfacial adhesion performance of prefabricated UHPC-NC diagonal shear groove | |
| CN207863307U (en) | A kind of novel concrete-filled steel square tubular column | |
| Ma et al. | Experimental investigation of FRP-confined HSC-filled steel tube stub columns under axial compression | |
| Osman et al. | Behavior of confined columns under different techniques | |
| Plückelmann et al. | Experimental investigation of hybrid concrete elements with varying fiber reinforcement under concentrated load | |
| CN105040828B (en) | A kind of round steel pipe binding type steel concrete column and steel beam joint structure | |
| CN209508966U (en) | A kind of structure solving PHC tubular pile body defect | |
| CN109689990A (en) | The C-shaped section and compound floor support plate that composite steel-concrete column system cold forming plate is formed | |
| CN207727844U (en) | A kind of steel core concrete column of high tensile steel wire mesh sheet enhancing | |
| Khan et al. | A comparative study of ground improvement by lime and granular |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180619 |