CN115217270B - Large-diameter circular steel tube concrete column with built-in vertical ribs and preparation method thereof - Google Patents
Large-diameter circular steel tube concrete column with built-in vertical ribs and preparation method thereof Download PDFInfo
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- CN115217270B CN115217270B CN202110424442.9A CN202110424442A CN115217270B CN 115217270 B CN115217270 B CN 115217270B CN 202110424442 A CN202110424442 A CN 202110424442A CN 115217270 B CN115217270 B CN 115217270B
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Abstract
The invention discloses a large-diameter circular steel tube concrete column with built-in vertical ribs and a preparation method thereof, belongs to the technical field of civil engineering, and solves the problems of difficult supply of bolts, low welding efficiency of the bolts and the like in the prior art. The large-diameter circular steel tube concrete column with the built-in vertical ribs comprises circular steel tubes, concrete and vertical ribs; the vertical ribs are arranged on the inner wall of the round steel pipe, and the axial directions of the vertical ribs are parallel to the axial directions of the round steel pipe; the concrete is filled in the round steel pipe; the diameter of the round steel pipe is more than or equal to 1000mm; the rib height of the vertical ribs is more than or equal to 30mm. The round steel tube concrete column provided by the invention utilizes the leftover materials generated by processing the steel structure, has a larger application space on the aspect of reducing the cost, does not need to purchase the stud, and relieves the problem of difficult stud supply.
Description
Technical Field
The invention belongs to the technical field of civil engineering, relates to the technical field of constructional engineering, and in particular relates to a large-diameter circular steel tube concrete column with built-in vertical ribs and a preparation method thereof.
Background
The round steel tube concrete column member has the advantages of high bearing capacity, good plasticity and toughness, obvious economic benefit, quick construction and the like, and is widely applied to structures such as high-rise, super high-rise, power transmission towers, bridges, industrial plants and the like. For such components, the combined action between the steel pipe and the concrete has a great influence on the properties (such as ductility, earthquake resistance and the like) thereof. In practical engineering, in order to enhance the combined action of a steel pipe and concrete of a round steel pipe concrete column member (in particular, a large diameter round steel pipe concrete column member having a diameter of 1000mm or more), it is common practice to provide a pin connector inside a round steel pipe.
However, the conventional method for improving the combined effect of steel pipes and concrete by providing a peg connection has the following two problems in recent years of application: firstly, the production of the pegs has the phenomena of high emission and high pollution, and along with the enhancement of environmental protection consciousness, the energy saving and emission reduction strength of China is also continuously enhanced, so that the pegs are stopped or limited in production in a plurality of places, and the situation that the pegs cannot be supplied in recent years is caused; secondly, setting the peg in the round steel pipe concrete column component can only adopt manual welding's mode, leads to that the efficiency of construction is low, the quality is difficult for guaranteeing, can not adapt to the characteristics of present industrialization construction.
In order to alleviate the above problems, there are also some attempts in some practical engineering projects to provide horizontal annular ribs at intervals inside the steel tubular concrete column to replace the pegs, but there are also some problems with this approach: 1) The horizontal annular rib is formed by cutting round steel plates, so that a large amount of waste materials and waste materials are caused, and the horizontal annular rib is uneconomical; 2) The total weld length of the horizontal annular rib is longer, so that the problem of construction efficiency exists; 3) Welding horizontal annular ribs results in the appearance of multiple concrete to rib horizontal interfaces that are not easily densified during concrete placement, resulting in quality hazards to the component.
Disclosure of Invention
In view of the analysis, the invention aims to provide a large-diameter circular steel tube concrete column with built-in vertical ribs and a preparation method thereof, which are used for solving the problems of difficult supply of bolts, low welding efficiency of the bolts and the like in the prior art.
The aim of the invention is mainly realized by the following technical scheme:
a large-diameter circular steel tube concrete column with built-in vertical ribs comprises a circular steel tube, concrete and vertical ribs;
the vertical ribs are arranged on the inner wall of the round steel pipe, and the axial directions of the vertical ribs are parallel to the axial directions of the round steel pipe;
the concrete is filled in the round steel pipe.
Further, the vertical ribs are arranged in a plurality of groups, and the plurality of groups of vertical ribs are uniformly arranged on the inner wall of the round steel pipe along the circumferential direction.
Further, each of the plurality of groups of vertical ribs comprises a vertical rib, the vertical ribs are equal to the round steel pipe in length, and the vertical ribs are continuous rib plates in the axial direction.
Further, each group of the plurality of groups of vertical ribs comprises a plurality of vertical ribs, the length of each vertical rib is smaller than that of the round steel pipe, and the plurality of vertical ribs are axially arranged at intervals.
Further, the vertical ribs are scrap of the remaining laths of the steel structure processing.
Further, the vertical ribs are steel structure processing residual angle steel scraps.
Further, the diameter of the round steel pipe is more than or equal to 1000mm.
Further, the rib height of the vertical ribs is more than or equal to 60mm.
Further, the rib height of the angle steel in the vertical rib (namely the height of the connecting end of the angle steel and the round steel pipe) is more than or equal to 30mm.
A preparation method of a large-diameter circular steel tube concrete column with built-in vertical ribs comprises the following steps:
and 4, pouring concrete downwards from the top of the round steel pipe in a layered pouring mode, and fully vibrating to obtain the large-diameter round steel pipe concrete column with the built-in vertical ribs.
Compared with the prior art, the invention can at least realize one of the following technical effects:
1) The invention fully utilizes the leftover bits and pieces (including: laths or angle steel), and has larger application space on the aspect of reducing cost. And the problem of difficult supply of the pegs is relieved without purchasing the pegs, and meanwhile, the pollution to the environment caused by the production of the pegs is reduced, so that the energy-saving and emission-reducing device has a larger application space.
2) The built-in vertical ribs can enhance the interaction between the concrete and the round steel pipe and simultaneously improve the integral bearing capacity of the member.
3) The built-in vertical ribs can be welded with the round steel pipe by adopting a long-arm robot, and can realize industrialized and mechanized production, so that the production efficiency is high, the quality is reliable, and the concept of modern industrialized construction is more met.
4) Compared with the horizontal annular rib, the built-in vertical rib has no influence on concrete pouring, so that the concrete pouring quality is improved, and potential safety hazards are eliminated.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like numbers referring to like parts throughout the drawings.
Fig. 1 is a schematic structural view of embodiment 1;
FIG. 2 is a schematic A-A of example 1;
fig. 3 is a schematic structural view of embodiment 2;
fig. 4 is a schematic structural view of embodiment 3;
fig. 5 is a schematic structural view of embodiment 5;
FIG. 6 is a schematic A-A of example 5;
fig. 7 is a schematic structural view of comparative example 1;
FIG. 8 is a schematic A-A of comparative example 1;
FIG. 9 is an anti-slip force versus relative slip curve for example 5 and comparative example 1;
fig. 10 is a schematic view of the angle steel structure.
Reference numerals:
1-a round steel pipe; 2-concrete; 3-vertical ribs; 4-void; and 5-connecting the angle steel with the round steel pipe.
Detailed Description
A large diameter internally installed vertical rib round steel tubular concrete column and a method for preparing the same are described in further detail below with reference to specific examples, which are for comparison and explanation purposes only, and the present invention is not limited to these examples.
A large-diameter circular steel tube concrete column with built-in vertical ribs comprises a circular steel tube 1, concrete 2 and vertical ribs 3; the vertical ribs 3 are arranged on the inner wall of the round steel pipe 1, and the axial directions of the vertical ribs 3 are parallel to the axial directions of the round steel pipe 1; the round steel pipe 1 is filled with concrete 2.
In the invention, the vertical ribs 3 adopt leftover bits and pieces generated by processing steel structures to replace the traditional pin connectors (or horizontal annular ribs) to be used as connectors between the round steel pipes 1 and the concrete 2. The studs do not need to be purchased additionally, the welding mode of the vertical ribs 3 and the inner wall of the round steel pipe 1 is the welding mode in the direction parallel to the axial direction of the round steel pipe 1, the welding can be completed by adopting a long-arm robot, the studs do not need to be manually drilled into the round steel pipe 1 one by one, the vertical ribs 3 are arranged to prevent the casting of the concrete 2 from being influenced, and the problems that the stud connecting piece (or the horizontal annular rib) arranged in the large-diameter round steel pipe concrete column member is high in pollution, high in cost, low in efficiency and difficult in quality guarantee are solved.
The interaction between the round steel pipe 1 and the concrete 2 can fully exert the advantages of the two materials, so that the utilization rate of the materials is improved, and meanwhile, the outer round steel pipe 1 can serve as a template for pouring the internal concrete 2, so that the cost is saved and the construction progress is quickened.
The vertical ribs 3 are provided with a plurality of vertical ribs 3 which are uniformly arranged on the inner wall of the round steel pipe 1.
The effect of the vertical ribs 3 on the whole circular steel tube concrete column member can be divided into two cases depending on the length of the leftover bits and pieces generated by the actual steel structure processing:
when the length of the leftover bits and pieces is short, the length of the vertical ribs 3 is smaller than that of the round steel tube 1, and a plurality of vertical ribs 3 are arranged at intervals in the axial direction.
When the length of the leftover materials is longer, the length of the vertical ribs 3 is equal to that of the round steel tube 1, and the vertical ribs 3 are continuous rib plates in the axial direction. At this time, the vertical ribs 3 not only play a role of connecting pieces, but also contribute to the improvement of the whole bearing capacity of the round steel tube concrete column member.
When the built-in vertical rib round steel tube concrete column of the invention bears local axial compressive load (namely, the condition that the load acting area is smaller than the cross section area of a component): when the large-diameter circular steel tube concrete column bears the action of local pressure load, the circumferential deformation of the outer circular steel tube 1 mainly comes from the pressed transverse deformation of the inner concrete 2, the longitudinal deformation mainly comes from the shear stress transmission of the interface between the steel tube and the concrete 2, and the built-in vertical rib 3 can increase the bonding area of the circular steel tube 1 and the concrete 2, so that the interaction of the two materials is enhanced, and the joint work of the circular steel tube 1 and the concrete 2 is ensured; in addition, when the mode of arranging the built-in vertical ribs 3 at intervals is adopted, the shearing resistance of the ribs can also enhance the capability of transmitting shearing stress of an interface, and the interaction of two materials is further enhanced.
When the built-in vertical rib round steel pipe concrete column bears the axial compressive load with full section (namely, the load acting area is larger than or equal to the cross section area of the component), the invention comprises the following steps: the built-in vertical ribs 3 can increase the bonding area of the round steel pipe 1 and the concrete 2 so as to enhance the interaction of the two materials; in addition, when the mode of continuously arranging the built-in vertical ribs 3 is adopted, the ribs directly participate in bearing, so that the whole bearing capacity of the component can be improved.
The leftover materials comprise battens or angle steel.
When the built-in vertical rib round steel tube concrete column of the invention bears the bias load or the earthquake action: because of the complex actions of one or more loads such as bending moment, shearing force, axial force and the like, the interface between the concrete 2 and the steel pipe of the round steel pipe concrete column member has a damage or even destroy trend, and the trend is more obvious particularly for members with larger diameters (the diameter is more than or equal to 1000 mm), the bonding area between the steel pipe and the concrete 2 can be increased after the built-in vertical ribs 3 are arranged, so that the interaction of two materials is enhanced, and the interface destruction of the column member is effectively prevented or delayed; in addition, when the angle steel built-in vertical rib 3 is adopted, the internal concrete 2 can be embedded, and the interaction of two materials is further enhanced.
Preferably, when the vertical ribs are battens, the rib height of the vertical ribs is 60mm or more. When the vertical ribs are angle steel, the height of the connecting end 5 (namely the edge where the angle steel is connected with the round steel pipe) of the angle steel and the round steel pipe in the vertical ribs is more than or equal to 30mm.
When the diameter of the round steel pipe concrete column is larger than 2000mm, the influence of the shrinkage of the internal concrete 2 on the stress performance of the member is remarkable, and the influence of the shrinkage of the internal concrete 2 can be effectively reduced by arranging the built-in vertical ribs 3. Wherein, the strip built-in vertical ribs 3 reduce the influence of shrinkage of the internal concrete 2 by increasing the bonding area of the steel pipe and the concrete 2; the angle steel built-in vertical rib 3 can be embedded into the concrete 2 while increasing the bonding area of the steel pipe and the concrete 2, so that the influence of shrinkage of the concrete 2 in the interior is further reduced.
The steel grades of the outer circular steel pipe 1 and the built-in vertical ribs 3 can be different, wherein the steel grade of the outer circular steel pipe 1 is selected according to the design of components and the actual purchase condition, and the steel grade of the built-in vertical ribs 3 is determined according to the grade of the residual materials generated by the actual steel structure processing.
A preparation method of a large-diameter circular steel tube concrete column with built-in vertical ribs comprises the following steps:
and 1, preparing a round steel pipe 1, rolling a steel plate into a cylinder through cold working, and connecting two ends of the steel plate through a full penetration butt weld.
And 2, determining the total amount of the built-in vertical ribs 3 and the number of each group of vertical ribs 3 according to the shearing bearing capacity of the bolts required by construction and the types and the sizes of steel structure residues, and further determining the distribution condition of the vertical ribs 3 according to the principle that each group of vertical ribs 3 are uniformly distributed along the circumferential direction of the round steel pipe 1.
and 4, pouring concrete downwards from the top of the round steel pipe 1 in a layered pouring mode, and fully vibrating to obtain the round steel pipe concrete column with the built-in vertical ribs.
The equivalent principle of the peg and the built-in vertical rib should be determined according to experiments or numerical simulation.
In the absence of test and simulation data, the estimation can be performed as follows:
1) Continuous rib arrangement (i.e. when the vertical ribs are continuous ribs):
firstly, calculating the shearing bearing capacity N of the original structure set stud v For the pegs with the rod length longer than 4 times of the rod diameter, N v Can be calculated by the following formula:
wherein n is the number of pegs A s For the cross-section area of the peg E c F c Respectively concreteElastic modulus and compressive strength of the steel sheet.
Next, the average section adhesion τ of the steel to the core concrete in the component is determined bond When test data is absent, it can be estimated as follows: τ bond = 2.314-0.0195 (d/t); in the formula, d is the diameter of core concrete, and t is the wall thickness of the round steel pipe.
Again, the required built-in vertical rib side area (i.e., vertical rib to concrete contact area) A is determined rs ：A rs ＝N v /τ bond 。
And finally, determining the number of the required ribs according to the type and the size of the steel structure excess material, and determining the distribution of the vertical ribs according to the principle that each group of vertical ribs are uniformly distributed along the circumferential direction of the round steel pipe.
2) In the case of ribs spaced apart (i.e., a plurality of vertical ribs spaced apart in the axial direction):
the difference from continuous ribbed is the existence of mechanical bite force N between the concrete and the built-in vertical ribs, namely: N+A rs τ bond ＝N v Wherein N can be defined by n=a rtop f c Performing estimation, wherein A rtop The cross-sectional area of the built-in vertical rib is obtained by: a is that rs ＝(N v -N)/τ bond 。
Then, the number of the required ribs is determined by the type and the size of the steel structure remainder, and the vertical ribs are distributed according to the principle of uniform distribution along the circumferential direction and the radial direction of the round steel pipe.
Example 1
The large-diameter internal vertical rib round steel pipe concrete column comprises an external round steel pipe 1, internal concrete 2 and an internal vertical rib 3, as shown in figure 1; the built-in vertical ribs 3 are strip surplus materials produced by steel structure processing, and the built-in vertical ribs 3 are welded inside the outer circular steel tube 1 along the axial direction of the built-in vertical rib circular steel tube concrete column member; the built-in vertical ribs 3 are in the form of a continuous arrangement as shown in fig. 2. The built-in vertical ribs 3 can increase the bonding area of the outer circular steel tube 1 and the inner concrete 2, so that the interaction between the outer circular steel tube 1 and the inner concrete 2 is improved, and the damage of the interface between the outer circular steel tube 1 and the inner concrete 2 under the action of bias load, reciprocating load and the like is effectively prevented or delayed; in addition, the built-in vertical ribs 3 which are arranged in a through length mode can bear the load together with the outer round steel pipe 1 and the inner concrete 2, and therefore the overall bearing capacity of the column member can be improved.
Example 2
As shown in fig. 3, the structure of the concrete column with built-in vertical ribs and round steel pipes provided in the embodiment 2 is basically the same as that in the embodiment 1, except that in the embodiment 2, the built-in vertical ribs 3 are made of steel structures, and the leftover materials generated by processing the steel structures are angle steel.
In the embodiment 2, the built-in vertical ribs 3 can increase the bonding area of the outer circular steel tube 1 and the inner concrete 2, and the built-in vertical ribs 3 can be embedded into the inner concrete 2, so that the interaction between the outer circular steel tube 1 and the inner concrete 2 is improved, and the damage of the interface between the outer circular steel tube 1 and the inner concrete 2 under the actions of bias load, reciprocating load and the like is effectively prevented or delayed; in addition, the built-in vertical ribs 3 which are arranged in a through length mode can bear the load together with the outer round steel pipe 1 and the inner concrete 2, and therefore the overall bearing capacity of the column member can be improved.
Example 3
As shown in fig. 4, the structure of the built-in vertical rib circular steel tube concrete column provided in embodiment 3 is basically the same as that of embodiment 1, except that in embodiment 3, the built-in vertical ribs 3 are arranged at intervals in the axial direction.
The length of the excess material produced by the actual steel structure processing is uncertain, and when the built-in vertical ribs 3 cannot be arranged continuously, the mode of the embodiment can be adopted. In the embodiment, the built-in vertical ribs 3 can increase the bonding area of the outer circular steel tube 1 and the inner concrete 2, and the shearing resistance of the built-in vertical ribs 3 can enhance the capability of transmitting shearing stress at the interface, so that the interaction between the outer circular steel tube 1 and the inner concrete 2 is improved, and the damage of the interface between the outer circular steel tube 1 and the inner concrete 2 under the actions of bias load, reciprocating load and the like is effectively prevented or delayed.
Example 4
The structure of the built-in vertical rib round steel tube concrete column provided in example 4 is basically the same as that in example 2, except that in example 4, the built-in vertical ribs are arranged at intervals in the axial direction.
The built-in vertical rib 3 of example 4 can be embedded in the internal concrete 2 as compared with example 3, further improving the interaction of the external round steel pipe 1 with the internal concrete 2.
Example 5
Push-out test of large-diameter circular steel tube concrete column with built-in vertical ribs.
As shown in fig. 5, 6 and 10, the large-diameter circular steel tube concrete column with built-in vertical ribs comprises an outer circular steel tube 1, inner concrete 2 and built-in vertical ribs 3; the outer diameter of the outer round steel pipe 1 is 1000mm, the wall thickness is 20mm, the steel grade is Q355, and the height is 1400mm; the material of the internal concrete 2 is marked as C60, and the height is 1300mm; the built-in vertical ribs 3 are angle steel, the angle steel size L is 80mm multiplied by 50mm multiplied by 5mm (side width multiplied by side thickness), the steel brand is Q345, the length of the built-in vertical ribs 3 is 1200mm, and the difference between the upper end face and the lower end face of the built-in vertical ribs 3 and the upper end face and the lower end face of the outer round steel pipe 1 is 100mm respectively, so that the built-in vertical ribs are prevented from directly bearing loads to influence the accuracy of pushing out test results. A gap of 100mm exists between the lower part of the outer circular steel tube 1 and the inner concrete 2 so as to realize the push-out of the inner concrete 2; 8 built-in vertical ribs 3 are uniformly distributed along the circumferential direction of the inner wall of the outer round steel pipe.
Example 6
A large-diameter internal vertical rib circular steel tube concrete column (not shown in the figure) was provided, and the structure of the internal vertical rib circular steel tube concrete column was substantially the same as that of example 1, except that in example 6, the internal vertical ribs along the circumferential direction of the circular steel tube were arranged in a continuous arrangement and in a spaced arrangement to intersect.
The built-in vertical ribs 3 can increase the bonding area of the outer circular steel tube 1 and the inner concrete 2, so that the interaction between the outer circular steel tube 1 and the inner concrete 2 is improved, and the damage of the interface between the outer circular steel tube 1 and the inner concrete 2 under the action of bias load, reciprocating load and the like is effectively prevented or delayed; in addition, the built-in vertical ribs 3 which are arranged in a continuous mode can bear the load together with the outer round steel pipe 1 and the inner concrete 2, and further the integral bearing capacity of the column member can be improved; the built-in vertical ribs arranged at intervals in the axial direction can increase the bonding area of the outer circular steel tube 1 and the inner concrete 2, and the shearing resistance of the built-in vertical ribs 3 can enhance the capability of transmitting shearing stress at the interface, so that the interaction between the outer circular steel tube 1 and the inner concrete 2 is improved.
Comparative example 1
The pin-in round steel tube concrete column member was pushed out of the test comparative example.
The built-in peg round steel tube concrete column component comprises an outer round steel tube 1, an inner concrete 2 and a built-in peg 4; the outer diameter of the outer round steel pipe 1 is 1000mm, the wall thickness is 20mm, the steel grade is Q355, and the height is 1400mm; the material of the internal concrete 2 is marked as C60, and the height is 1300mm; built-in peg 4 is
The pegs are arranged in 8 circumferential directions x 6 axial directions, and 48 pegs are arranged in total. The arrangement of the parts of the concrete filled steel tubular column member with the built-in peg in comparative example 1 is shown in fig. 7 and 8.
Push-out test: push-out comparative tests were performed on the column of the internal vertical rib round steel tube concrete obtained in example 5 and the column of the internal peg round steel tube concrete obtained in comparative example 1.
The anti-slip force-relative slip amount curves of the two test pieces after the push-out test are shown in fig. 9, wherein curve a represents the test result of the built-in vertical rib round steel tube concrete column obtained in example 5, and curve B represents the test result of the built-in peg round steel tube concrete column obtained in comparative example 1. Compared with the built-in stud round steel tube concrete column component, the built-in vertical rib round steel tube concrete column component has larger initial anti-slip rigidity; in addition, when the peg yields, the built-in peg round steel pipe concrete column component can appear that anti-slip ability loses rapidly, and the built-in vertical rib round steel pipe concrete column component can not appear anti-slip ability suddenly decline's condition, has better anti-slip ability.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (6)
1. The preparation method of the large-diameter built-in vertical rib round steel pipe concrete column is characterized in that the round steel pipe concrete column comprises round steel pipes, concrete and vertical ribs;
the vertical ribs are arranged on the inner wall of the round steel pipe, the axial directions of the vertical ribs are parallel to the axial directions of the round steel pipe, and the vertical ribs are angle steel;
the concrete is filled in the round steel pipe;
the diameter of the round steel pipe is more than or equal to 2000mm; the height of the angle steel relative to the connecting end is more than or equal to 30mm, and the connecting end is: the edge of the angle steel, which is connected with the round steel pipe, is provided with a connecting hole;
the preparation method comprises the following steps:
step 1, preparing a round steel pipe, rolling a steel plate into a cylinder through cold processing, and connecting two ends of the steel plate through full penetration butt welding seams;
step 2, determining the total amount of built-in vertical ribs and the number of each group of vertical ribs according to the shearing bearing capacity of the studs required by construction and the types and the sizes of steel structure clogs, and further determining the distribution condition of the vertical ribs according to the principle that each group of vertical ribs are uniformly distributed along the circumferential direction of the round steel pipe;
step 3, connecting the vertical ribs with the inner wall of the round steel pipe along the axial direction by adopting a long-arm robot welding mode through fillet welds;
step 4, pouring concrete downwards from the top of the round steel pipe in a layered pouring mode, and fully vibrating to obtain a large-diameter round steel pipe concrete column with built-in vertical ribs;
in the step 2, when the vertical rib is a continuous rib, the number of the ribs is determined according to the type and the size of the steel structure and the contact area between the vertical rib and the concrete, and the contact areaA rs The following formula is satisfied:
when a plurality of vertical ribs are arranged at intervals in the axial direction, the number of the rib plates is determined according to the type and the size of the steel structure and the contact area of the vertical ribs and the concrete, and the contact areaA rs The following formula is satisfied:
wherein ,N v setting the shearing bearing capacity of a bolt for the original structure, wherein the rod length of the bolt is longer than 4 times of the rod diameter;nfor the number of the pegs, the number of the pegs is the same,A s is the cross-sectional area of the peg,E c a kind of electronic device with high-pressure air-conditioning systemf c The elastic modulus and the compressive strength of the concrete are respectively;τ bond the average section adhesion force of the steel and the core concrete in the component;dis the diameter of core concrete;tthe wall thickness of the round steel pipe is; n is the mechanical biting force between the concrete and the vertical rib;A rtop is the cross-sectional area of the vertical rib.
2. The method of claim 1, wherein the plurality of sets of vertical ribs are arranged and the plurality of sets of vertical ribs are uniformly arranged on the inner wall of the round steel tube in the circumferential direction.
3. The method of claim 2, wherein each of the plurality of sets of vertical ribs comprises a vertical rib of equal length to the round steel tube, the vertical rib being a continuous rib in the axial direction.
4. The method of claim 2, wherein each of the plurality of sets of vertical ribs comprises a plurality of vertical ribs, the vertical ribs having a length less than the length of the round steel tube, the plurality of vertical ribs being axially spaced apart.
5. The method of claim 4, wherein the plurality of vertical ribs in each set of vertical ribs are coaxially disposed in the axial direction.
6. The method of any one of claims 1-5, wherein the vertical ribs are steel structure processing remaining angle steel scrap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110424442.9A CN115217270B (en) | 2021-04-20 | 2021-04-20 | Large-diameter circular steel tube concrete column with built-in vertical ribs and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110424442.9A CN115217270B (en) | 2021-04-20 | 2021-04-20 | Large-diameter circular steel tube concrete column with built-in vertical ribs and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115217270A CN115217270A (en) | 2022-10-21 |
| CN115217270B true CN115217270B (en) | 2023-06-13 |
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Citations (8)
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| JP2006159581A (en) * | 2004-12-07 | 2006-06-22 | Nippon Steel Corp | Combined segment and its manufacturing method |
| JP2012140824A (en) * | 2011-01-05 | 2012-07-26 | Takenaka Komuten Co Ltd | Concrete filled steel pipe column |
| CN102979250A (en) * | 2012-12-27 | 2013-03-20 | 长安大学 | SCS (structure cabling system) encased structure based on longitudinal stiffening ribs |
| CN103276851A (en) * | 2013-06-09 | 2013-09-04 | 中冶建筑研究总院有限公司 | Ribbed steel tube, concrete-filled ribbed steel tube column and designing method of ribbed steel tube |
| CN205171832U (en) * | 2015-10-19 | 2016-04-20 | 南阳理工学院 | Take stiffening rib steel core concrete column |
| CN206034757U (en) * | 2016-08-19 | 2017-03-22 | 深圳大学建筑设计研究院有限公司 | Steel core concrete column structure |
| CN106930470A (en) * | 2017-05-08 | 2017-07-07 | 华侨大学 | A kind of concrete filled steel tube composite column structure with ribbing surrendered stage by stage |
| CN210216917U (en) * | 2019-06-28 | 2020-03-31 | 南阳理工学院 | Closed steel core concrete column of strenghthened type |
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2021
- 2021-04-20 CN CN202110424442.9A patent/CN115217270B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006159581A (en) * | 2004-12-07 | 2006-06-22 | Nippon Steel Corp | Combined segment and its manufacturing method |
| JP2012140824A (en) * | 2011-01-05 | 2012-07-26 | Takenaka Komuten Co Ltd | Concrete filled steel pipe column |
| CN102979250A (en) * | 2012-12-27 | 2013-03-20 | 长安大学 | SCS (structure cabling system) encased structure based on longitudinal stiffening ribs |
| CN103276851A (en) * | 2013-06-09 | 2013-09-04 | 中冶建筑研究总院有限公司 | Ribbed steel tube, concrete-filled ribbed steel tube column and designing method of ribbed steel tube |
| CN205171832U (en) * | 2015-10-19 | 2016-04-20 | 南阳理工学院 | Take stiffening rib steel core concrete column |
| CN206034757U (en) * | 2016-08-19 | 2017-03-22 | 深圳大学建筑设计研究院有限公司 | Steel core concrete column structure |
| CN106930470A (en) * | 2017-05-08 | 2017-07-07 | 华侨大学 | A kind of concrete filled steel tube composite column structure with ribbing surrendered stage by stage |
| CN210216917U (en) * | 2019-06-28 | 2020-03-31 | 南阳理工学院 | Closed steel core concrete column of strenghthened type |
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| CN115217270A (en) | 2022-10-21 |
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