CN115680115B - Conversion node of concrete composite column and construction method - Google Patents
Conversion node of concrete composite column and construction method Download PDFInfo
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- CN115680115B CN115680115B CN202211401248.XA CN202211401248A CN115680115B CN 115680115 B CN115680115 B CN 115680115B CN 202211401248 A CN202211401248 A CN 202211401248A CN 115680115 B CN115680115 B CN 115680115B
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- 239000004567 concrete Substances 0.000 title claims abstract description 77
- 239000002131 composite material Substances 0.000 title claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 28
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 171
- 239000010959 steel Substances 0.000 claims abstract description 171
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 38
- 238000003466 welding Methods 0.000 claims description 34
- 238000012546 transfer Methods 0.000 claims description 10
- 230000007704 transition Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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Abstract
The invention discloses a conversion node of a concrete composite column and a construction method, wherein the conversion node is a connection node of an upper layer steel tube concrete column part and a lower layer steel tube concrete composite column with a frame and a reinforced concrete beam part with a certain gradient, and an upper layer steel tube in the upper layer steel tube concrete part passes through a core area of the conversion node and partially stretches into an upper area in the lower layer steel tube concrete composite column with the frame and a certain gradient. The invention can be applied to the connection part of the upper structure and the lower structure, namely the embedded end part of the building structure, provides larger rigidity and strength in engineering, meets the embedded requirement, has simple structure and easy construction, can effectively shorten the construction time and improve the construction efficiency.
Description
Technical Field
The invention relates to the technical field of civil engineering, in particular to a conversion node of a concrete composite column and a construction method.
Background
In large public buildings, it is common for steel structures to be mixed with concrete structures for use. This involves construction problems at the junctions of the different forms, i.e. the construction of the conversion nodes. Particularly in the vertical mixed structure, a large blank still exists in the related research in the construction method of the joint of the steel pipe concrete structure at the upper layer and the reinforced concrete structure at the lower layer.
The prior practice often increases the cross-sectional size of the lower reinforced concrete column, inserts the upper steel pipe or the steel pipe concrete column into the lower column completely without changing the cross-sectional size, and wraps the upper steel pipe or the steel pipe concrete column into the reinforced concrete column. The method is safe, but is conservative, and has the defect of wasting building space due to overlarge cross section size of the lower column. In addition, the existing construction mode has the disadvantages of large consumption of building materials, high construction difficulty, long construction period and poor economic benefit in engineering. Therefore, under the premise of ensuring normal use, the construction form of the conversion node is provided, which can effectively reduce the section size of the lower column, has low construction difficulty and can fully exert the material performance, and has important engineering application significance.
Disclosure of Invention
The invention aims to design a conversion node of a concrete composite column and a construction method thereof so as to solve the problems in the background technology. The mechanical property of the conversion node can meet the actual requirements of engineering, greatly reduces the construction difficulty, improves the construction efficiency and can create greater economic value.
In order to achieve the above purpose, the present invention provides the following technical solutions: the transition node of the concrete composite column is a connection node of an upper layer steel tube concrete column part and a lower layer of framed steel concrete composite column with a certain gradient and a reinforced concrete beam part, wherein an upper layer steel tube in the upper layer steel tube concrete part passes through a core area of the transition node and partially stretches into an upper area in the lower layer of framed steel concrete composite column with a certain gradient;
brackets are arranged in the node core area and welded at corresponding positions on the outer side of the upper layer of steel pipe concrete;
The bracket comprises a bracket upper first row of flange plates, a bracket upper second row of flange plates, a bracket bottom first row of flange plates, a bracket bottom second row of flange plates and a bracket web, wherein the bracket upper first row of flange plates, the bracket upper second row of flange plates, the bracket bottom first row of flange plates and the bracket bottom second row of flange plates are respectively welded to the upper edge and the lower edge of the bracket web;
The upper perforated stiffening plate of the node core area and the lower perforated stiffening plate of the node core area with vent holes are welded in the upper layer steel pipe in the range of the conversion node core area respectively, and the welding positions of the upper perforated stiffening plate and the lower perforated stiffening plate are positioned in the same plane with the surfaces of the upper flange and the lower flange of the bracket;
the lower layer of the section steel with the certain gradient and the frame is provided with a frame, and the top surface of the section steel is welded with the bottom surface of the upper layer of steel pipe;
The bottom surface of the variable section steel with the frame is welded with a constant section steel with the frame, and the constant section steel with the same shape as the section of the bottom of the variable section steel with the frame;
the lower layer is provided with a certain gradient, and longitudinal steel bars in a middle column of the framed steel reinforced concrete composite column are welded with the outer side of the bottom of the upper layer steel tube;
the longitudinal ribs in the middle beam of the reinforced concrete beam part are welded with the upper flange and the lower flange of the bracket;
And a certain number of in-column stirrups and in-beam stirrups are arranged in the lower layer of the steel reinforced concrete combined column with the frame and the reinforced concrete beam part with a certain gradient in a binding way.
As a preferable implementation mode of the invention, a plurality of studs are welded on the inner side and the outer side of the upper layer steel pipe, the variable section steel with the frame and the constant section steel with the frame.
As a preferred embodiment of the present invention, the symmetry axis of the cross section of the bracket coincides with the symmetry axis of the outer side surface of the upper layer steel pipe.
In a preferred embodiment of the present invention, the cross-sectional shape of the bracket is symmetrical.
In a preferred embodiment of the present invention, the cross-sectional shapes of the framed variable cross-section steel and the framed constant cross-section steel are symmetrical.
As a preferable implementation mode of the invention, the upper layer steel pipe, the lower layer steel pipe, the framed steel reinforced concrete composite column with a certain gradient and the reinforced concrete beam part are rectangular in cross section.
As a preferred implementation mode of the invention, triangular vent holes are arranged at four corners of the upper perforated stiffening plate of the node core area and the lower perforated stiffening plate of the node core area, grouting holes are arranged in the middle of the node core area, and the grouting holes are coaxial.
The construction method of the conversion node of the concrete composite column specifically comprises the following steps:
Step 1: welding a first row of flange plates at the upper part of the bracket, a second row of flange plates at the upper part of the bracket, a first row of flange plates at the bottom of the bracket, a second row of flange plates at the bottom of the bracket and a bracket web plate mutually vertically together, wherein the four flange plates are welded symmetrically and centrally during welding so as to obtain the bracket;
Step 2: when the upper steel pipe is processed, the upper perforated stiffening plate of the node core area and the lower perforated stiffening plate of the node core area are welded in place, and the bolts are welded;
Step 3: welding the top of the variable cross section steel with the frame with the bottom surface of the upper steel pipe; welding the top of the framed constant section steel with the bottom of the framed variable section steel, wherein after the step is finished, the steel can be welded with bolts, and the number of the bolts is determined according to actual engineering;
Step 4: welding brackets to the outer surface of an upper steel pipe at a node core area, welding longitudinal ribs at the top of a beam and longitudinal ribs at the bottom of the beam in a reinforced concrete beam part C to flange plates of the brackets, and binding stirrups in the beam after welding;
step 5: and welding the longitudinal steel bars in the middle column of the framed steel concrete combined column B with a certain gradient on the outer side of the bottom of the upper layer steel tube, wherein the welding length of the longitudinal steel bars stretches into the top of the node core area, and binding the stirrups in the column after welding.
Step 6: and (5) supporting the mould and pouring concrete of the conversion node.
Compared with the prior art, the invention provides a conversion node of a concrete composite column, which has the following beneficial effects:
The conversion node of the concrete combined column can be applied to the embedded end in actual engineering, can obviously reduce the cross section size of a lower column compared with the prior art, does not occupy excessive building space, and is particularly suitable for the actual engineering with strict requirements on the building space. In addition, the conversion node can provide enough rigidity and strength in engineering, has simple structure and easy construction, can effectively shorten the construction time, improves the construction efficiency and creates greater social and economic benefits.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
Fig. 1 is a schematic view showing a construction of a preferred embodiment of a transfer node of a framed steel reinforced concrete composite column having a slope between an upper layer of steel reinforced concrete and a lower layer of steel reinforced concrete according to the present invention.
Fig. 2 is an elevation view of an upper steel pipe, a framed variable section steel and a framed constant section steel of the upper steel pipe concrete and lower framed steel concrete composite column of a certain gradient shown in fig. 1.
Fig. 3 is a bracket elevation view of a transfer node of the framed steel concrete composite column shown in fig. 1 with an upper layer of steel concrete and a lower layer of steel concrete with a slope.
Fig. 4 is a bracket side view of a transfer node of the framed steel concrete composite column shown in fig. 1 with an upper layer of steel concrete and a lower layer of steel concrete with a slope.
Fig. 5 is a sectional view of an upper steel pipe of the framed steel concrete composite column shown in fig. 1 with a slope of the upper steel pipe concrete and the lower steel pipe concrete.
Fig. 6 is a sectional view of a node core area of a transition node of the framed steel reinforced concrete composite column of fig. 1 having a slope between an upper layer of steel reinforced concrete and a lower layer of steel reinforced concrete.
Fig. 7 is a cross-sectional view of a lower layer framed section steel of a transition node of the upper layer concrete filled steel tube and lower layer framed section steel concrete composite column shown in fig. 1 having a slope.
Fig. 8 is a cross-sectional view of a lower layer framed section steel of a transition node of the upper layer concrete filled steel tube and lower layer framed section steel concrete composite column shown in fig. 1 having a slope.
FIG. 9 is a schematic view of an open-celled stiffener of a transfer node of the framed steel reinforced concrete composite column shown in FIG. 1 with a slope of the upper layer of steel reinforced concrete and the lower layer of steel reinforced concrete.
Wherein, the meanings of each reference numeral are as follows:
a: an upper layer concrete filled steel tubular column part; the lower layer is provided with a section steel concrete combined column part with a frame and a certain gradient; c: reinforced concrete beam portions.
1: An upper layer steel pipe; 2: concrete; 3: a bracket; 4: a first row of flange plates are arranged at the upper parts of the brackets; 5: a second row of flange plates are arranged on the upper parts of the brackets; 6: a first row of flange plates at the bottom of the bracket; 7: a second row of flange plates at the bottom of the bracket; 8: bracket webs; 9: the upper part of the node core area is provided with a stiffening plate; 10: the lower part of the node core area is provided with a stiffening plate; 11: a peg; 12: variable cross-section steel with a frame; 13: a framed constant section steel; 14: longitudinal steel bars in the column; 15: longitudinal ribs in the beam; 16: stirrups in the column; 17: and stirrups in the beam.
Detailed Description
For a better understanding of the objects, structures and functions of the present invention, a concrete composite column of the present invention will be described in further detail with reference to the accompanying drawings.
Embodiment one:
as shown in fig. 1 to 9, the conversion node of the concrete composite column provided in this embodiment is a connection node between an upper layer concrete filled steel tube column portion a and a lower layer framed steel concrete composite column B and a reinforced concrete beam portion C having a certain gradient,
The upper layer steel pipe 1 in the upper layer steel pipe concrete part A passes through the core area of the conversion node and partially stretches into the upper area of the lower layer framed steel concrete composite column B with a certain gradient;
brackets 3 are arranged in the node core area and welded at corresponding positions on the outer side of the upper layer steel pipe concrete 1, and after concrete is poured, the brackets 3 can be completely wrapped by the concrete;
The bracket 3 comprises a bracket upper first-row flange plate 4, a bracket upper second-row flange plate 5, a bracket bottom first-row flange plate 6, a bracket bottom second-row flange plate 7 and a bracket web 8, wherein the bracket upper first-row flange plate 4, the bracket upper second-row flange plate 5, the bracket bottom first-row flange plate 6 and the bracket bottom second-row flange plate 7 are respectively welded to the upper edge and the lower edge of the bracket web 8;
The upper layer steel pipe 1 in the range of the conversion node core area is internally welded with a node core area upper perforated stiffening plate 9 with an exhaust hole and a node core area lower perforated stiffening plate 10 respectively, the welding positions of the upper perforated stiffening plate and the node core area lower perforated stiffening plate are positioned in the same plane with the surfaces of the upper flange and the lower flange of the bracket, and in the earthquake-resistant design, the performance requirements on the node core area are 'strong energy nodes, weak node members', namely, the node core area is ensured to be always in a normal working state. The bracket is welded on the side face of the node core area, when the node is stressed, the bracket can transmit the load in the beam to the node core area, and the load is one of the reasons for the complex stress of the node core area. In order to ensure that the node core area has enough rigidity and strength storage, stiffening plates inside the steel pipe are required to be arranged so as to play roles in resisting deformation and preventing local buckling, and the stability is improved, so that the rigidity and strength of the node core area are further improved. In addition, in the transportation process, the stiffening plate inside the steel pipe can avoid the deformation of the pipe orifice, and is favorable for positioning and welding the bracket.
The lower layer of the section steel 12 with the frame in the frame-shaped steel concrete combined column B with the certain gradient is section steel with the certain gradient, and the top surface of the section steel is welded with the bottom surface of the upper layer of the steel pipe 1;
the bottom surface of the framed variable section steel 12 is welded with a framed constant section steel 13 with the same shape as the bottom section of the framed variable section steel 12;
The lower layer is provided with a certain gradient, the longitudinal steel bars 14 in the middle column of the framed steel reinforced concrete combined column B are welded with the outer side of the bottom of the upper layer steel tube 1, and the cross section sizes of the bottoms of the two are consistent;
The longitudinal ribs 15 in the middle beam of the reinforced concrete beam part C are welded with the upper and lower flanges of the bracket 3 so as to transmit load;
and a certain number of column inner stirrups 16 and beam inner stirrups 17 are arranged in the framed steel concrete combined column B and the reinforced concrete beam part C with a certain gradient on the lower layer.
In the above example, preferably, the bolts 11 are welded on the inner and outer sides of the upper layer steel pipe 1, the variable section steel 12 with the frame and the constant section steel 13 with the frame, so that better cooperation between the concrete and the steel can be ensured.
In the above example, the cross-sectional symmetry axis of the bracket 3 preferably coincides with the symmetry axis of the outer side surface of the upper layer steel pipe 1.
In the above example, the cross-sectional shape of the bracket 3 is preferably symmetrical.
In the above example, the cross-sectional shapes of the framed variable cross-section steel 12 and the framed constant cross-section steel 13 are preferably symmetrical.
In the above example, the upper layer steel pipe concrete column part (a) (i.e., the upper layer steel pipe 1), the lower layer framed steel concrete composite column B having a certain gradient, and the reinforced concrete beam part C are preferably rectangular in cross section.
In the above example, preferably, the four corners of the node core area upper perforated stiffening plate 9 and the node core area lower perforated stiffening plate 10 are respectively provided with a triangular vent hole, the middle part is provided with two circular grouting holes, and the two grouting holes are coaxial.
In the above example, preferably, the top of the framed variable section steel 12 is in the same plane as the bottom surface of the reinforced concrete beam, i.e., the bottom plane of the upper layer steel pipe 1 is flush with the bottom surface of the reinforced concrete beam.
A construction method of a conversion node of a concrete composite column is applied to the conversion node of the concrete composite column, and specifically comprises the following steps:
Step 1: welding a bracket upper first row of flange plates 4, a bracket upper second row of flange plates 5, a bracket bottom first row of flange plates 6, a bracket bottom second row of flange plates 7 and a bracket web 8 together in a mutually perpendicular manner, wherein symmetrical and centered welding of the four flange plates is ensured during welding so as to obtain a bracket 3, as shown in fig. 3 and 4;
step 2: when the upper steel pipe 1 is processed, the upper perforated stiffening plate 9 of the node core area and the lower perforated stiffening plate 10 of the node core area are welded in place, and the studs 12 are welded, as shown in figure 5;
Step 3: welding the top of the framed variable section steel 12 with the bottom surface of the upper steel pipe 1 together as shown in fig. 2; welding the top of the framed constant section steel 13 with the bottom of the framed variable section steel 12, wherein after the step is finished, the bolts 12 can be welded on the section steel, and the number of the bolts is determined according to actual engineering;
Step 4: welding brackets 3 on the outer surface of an upper steel pipe 1 at a node core area, welding longitudinal ribs at the top and the bottom of a reinforced concrete beam part C on flange plates of the brackets, and binding beam inner stirrups after welding, as shown in figure 6;
step 5: the longitudinal steel bar 14 in the middle column of the framed steel reinforced concrete combined column B with a certain gradient on the lower layer is welded to the outer side of the bottom of the upper layer steel tube 1, the welding length of the longitudinal steel bar extends into the top of a node core area, and the stirrups in the column are bound after the welding is finished, at this time, the sectional views of the framed variable section steel 12 and the framed constant section steel 13 are respectively shown in fig. 7 and 8.
Step 6: the concrete 2 of the transfer node is formwork and poured as shown in fig. 1.
Embodiment two:
A concrete composite column conversion node and a construction method are different from the first embodiment: in this embodiment, the upper layer concrete filled steel tubular column portion (a) is a steel tube, and the inside is not filled with concrete.
It will be understood that the application has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the essential scope thereof. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. The utility model provides a conversion node of concrete composite column, conversion node is the connection node of upper concrete filled steel tube column part (A) and lower floor have frame shaped steel concrete composite column (B) and reinforced concrete beam part (C) of certain slope, its characterized in that:
the upper layer steel pipe (1) in the upper layer steel pipe concrete part (A) penetrates through the core area of the conversion node, and partially stretches into the upper area of the lower layer framed steel concrete composite column (B) with a certain gradient;
brackets (3) are arranged in the node core area and welded at corresponding positions on the outer side of the upper layer steel pipe (1);
The bracket (3) comprises a bracket upper first row of flange plates (4), a bracket upper second row of flange plates (5) and a bracket bottom first row of flange plates (6), a bracket bottom second row of flange plates (7) and a bracket web (8), wherein the bracket upper first row of flange plates (4), the bracket upper second row of flange plates (5) and the bracket bottom first row of flange plates (6) and the bracket bottom second row of flange plates (7) are respectively welded to the upper edge and the lower edge of the bracket web (8);
The upper perforated stiffening plate (9) and the lower perforated stiffening plate (10) of the node core area with vent holes are welded in the upper layer steel pipe (1) in the range of the transition node core area respectively, and the welding positions of the upper perforated stiffening plate and the lower perforated stiffening plate and the upper perforated stiffening plate and the lower perforated stiffening plate are positioned in the same plane with the surfaces of the upper flange and the lower flange of the bracket;
The lower layer is provided with a frame-shaped steel concrete composite column (B) with a certain gradient, the section-variable section-shaped steel (12) with a frame is provided with a section steel with a certain gradient, and the top surface of the section steel is welded with the bottom surface of the upper layer steel pipe (1);
the bottom surface of the framed variable section steel (12) is welded with a framed constant section steel (13) which has the same shape as the bottom section of the framed variable section steel (12);
The lower layer is provided with a certain gradient and is provided with a frame type steel reinforced concrete combined column (B), and a longitudinal steel bar (14) in the middle column is welded with the outer side of the bottom of the upper layer steel tube (1);
The longitudinal ribs (15) in the middle beam of the reinforced concrete beam part (C) are welded with the upper flange and the lower flange of the bracket (3);
The lower layer is provided with a certain gradient of framed steel reinforced concrete combined column (B) and a certain number of column inner stirrups (16) and beam inner stirrups (17) which are arranged in a binding way in the reinforced concrete beam part (C);
The steel pipe is characterized in that a plurality of pegs (11) are welded on the inner side and the outer side of the upper layer steel pipe (1) and the variable section steel (12) with the frame and the constant section steel (13) with the frame.
2. A concrete composite column transfer node according to claim 1, wherein: the symmetry axis of the cross section of the bracket (3) coincides with the symmetry axis of the outer side surface of the upper layer steel pipe (1).
3. A concrete composite column transfer node according to claim 1, wherein: the cross section of the bracket (3) is symmetrical.
4. A concrete composite column transfer node according to claim 1, wherein: the cross section shapes of the variable section steel (12) with the frame and the constant section steel (13) with the frame are symmetrical.
5. A concrete composite column transfer node according to claim 1, wherein: the upper layer steel pipe (1), the lower layer steel pipe and the reinforced concrete beam part (C) are rectangular in cross section.
6. A concrete composite column transfer node according to claim 1, wherein: triangular exhaust holes are formed in four corners of the upper perforated stiffening plate (9) of the node core area and the lower perforated stiffening plate (10) of the node core area, grouting holes are formed in the middle of the node core area, and the grouting holes are coaxial.
7. A construction method of a concrete composite column conversion node, applied to the concrete composite column conversion node according to any one of claims 1 to 6, characterized in that: the method specifically comprises the following steps:
step 1: welding a first row of flange plates (4) on the upper part of a bracket, a second row of flange plates (5) on the upper part of the bracket, a first row of flange plates (6) on the bottom of the bracket, a second row of flange plates (7) on the bottom of the bracket and a bracket web (8) mutually vertically together, wherein the four flange plates are welded symmetrically and centrally during welding so as to obtain the bracket (3);
Step 2: when the upper layer steel pipe (1) is processed, the upper perforated stiffening plate (9) of the node core area and the lower perforated stiffening plate (10) of the node core area are welded in place, and bolts (11) are welded;
step 3: welding the top of the variable cross section steel (12) with the frame with the bottom surface of the upper layer steel pipe (1); welding the top of the framed constant section steel (13) with the bottom of the framed variable section steel (12), wherein after the step is finished, bolts (11) are welded on the section steel, and the number of the bolts is determined according to actual engineering;
Step 4: welding brackets (3) on the outer surface of an upper layer steel pipe (1) at a node core area, welding longitudinal ribs at the top and the bottom of a reinforced concrete beam part (C) on a flange plate of the brackets, and binding stirrups in the beam after welding;
Step 5: welding longitudinal steel bars (14) in a middle column of the framed steel concrete composite column (B) with a certain gradient at the lower layer to the outer side of the bottom of the upper layer steel tube (1), extending the welding length to the top of a node core area, and binding stirrups in the column after welding;
step 6: and (3) supporting the mould and pouring concrete (2) of the conversion node.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211401248.XA CN115680115B (en) | 2022-11-09 | 2022-11-09 | Conversion node of concrete composite column and construction method |
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| CN202211401248.XA CN115680115B (en) | 2022-11-09 | 2022-11-09 | Conversion node of concrete composite column and construction method |
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| CN115680115A CN115680115A (en) | 2023-02-03 |
| CN115680115B true CN115680115B (en) | 2024-07-02 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436924A (en) * | 2016-08-22 | 2017-02-22 | 广西建工集团第五建筑工程有限责任公司 | Steel pipe concrete column variable section broken-line-shaped steel bracket and connecting construction method thereof |
| CN109680810A (en) * | 2019-02-28 | 2019-04-26 | 清华大学 | The switching node and construction method of upper layer steel pipe column and lower layer's reinforced column |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205444493U (en) * | 2016-03-30 | 2016-08-10 | 湖南金海钢结构股份有限公司 | Connected node device of concrete beam and steel core concrete column |
| CN109914695B (en) * | 2019-03-14 | 2020-07-31 | 河海大学 | Assembled steel reinforced concrete anti-seismic combination column based on variable cross section |
| CN112922231A (en) * | 2021-01-27 | 2021-06-08 | 海南大学 | Fabricated concrete beam-column joint and construction method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106436924A (en) * | 2016-08-22 | 2017-02-22 | 广西建工集团第五建筑工程有限责任公司 | Steel pipe concrete column variable section broken-line-shaped steel bracket and connecting construction method thereof |
| CN109680810A (en) * | 2019-02-28 | 2019-04-26 | 清华大学 | The switching node and construction method of upper layer steel pipe column and lower layer's reinforced column |
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