CN114457917B - PVC-FRP pipe-steel pipe concrete column and girder steel connected node - Google Patents
PVC-FRP pipe-steel pipe concrete column and girder steel connected node Download PDFInfo
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- CN114457917B CN114457917B CN202210161978.0A CN202210161978A CN114457917B CN 114457917 B CN114457917 B CN 114457917B CN 202210161978 A CN202210161978 A CN 202210161978A CN 114457917 B CN114457917 B CN 114457917B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 186
- 239000010959 steel Substances 0.000 title claims abstract description 186
- 239000004567 concrete Substances 0.000 title claims abstract description 87
- 239000000463 material Substances 0.000 claims description 8
- 230000002787 reinforcement Effects 0.000 claims description 7
- 102100040287 GTP cyclohydrolase 1 feedback regulatory protein Human genes 0.000 claims description 3
- 101710185324 GTP cyclohydrolase 1 feedback regulatory protein Proteins 0.000 claims description 3
- 101710107464 Probable pyruvate, phosphate dikinase regulatory protein, chloroplastic Proteins 0.000 claims description 3
- 239000004918 carbon fiber reinforced polymer Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000011372 high-strength concrete Substances 0.000 claims description 3
- 239000003733 fiber-reinforced composite Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/185—Connections not covered by E04B1/21 and E04B1/2403, e.g. connections between structural parts of different material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
- E04B1/5812—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially I - or H - form
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5837—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially circular form
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention relates to a connecting node of a PVC-FRP pipe-steel pipe concrete column and a steel beam, which comprises a PVC-FRP pipe, a column longitudinal rib, column stirrups, a column steel pipe, shear bolts, concrete in the steel pipe, concrete outside the steel pipe, a node area steel pipe, stiffening rib plates, hidden brackets, rectangular stirrups, trapezoidal stirrups, steel beams, high-strength bolts, flange connecting plates, web connecting plates and flanges.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to a connecting node of a PVC-FRP pipe-steel pipe concrete column and a steel beam.
Background
With the development of modern engineering structures to towering, large span and complicacy, the bearing capacity, construction technology and other aspects of traditional reinforced concrete structures can not meet the requirements of the modern engineering structures. In addition, reinforced concrete structures in long service are subject to common phenomena of concrete corrosion and steel rust, which can lead to deterioration of the concrete structure performance and degradation of durability.
The PVC-FRP pipe concrete column is a novel combined column formed by winding FRP on a PVC pipe and pouring concrete into the pipe. The PVC-FRP pipe plays a constraint role on the core concrete, and meanwhile, the PVC-FRP pipe can protect the core concrete from environmental erosion. Compared with the common concrete column, the PVC-FRP pipe concrete column has excellent bearing capacity and durability, and can be applied to engineering structures such as bridge engineering, underground engineering, ocean engineering and the like. However, one of the key problems in popularizing and applying the PVC-FRP pipe concrete column is to solve the problem of connection between the PVC-FRP pipe concrete column and a beam plate member.
The steel tube concrete core column is a combined structure column formed by placing steel tubes in a column reinforcement cage in advance and then pouring concrete. The bearing capacity of the common concrete column can be further improved by arranging the steel pipes in the PVC-FRP pipe concrete column, and the core steel pipes are arranged in the joint areas so as to be convenient to be welded with steel beams or connected with the steel beams through bolts to form combined joints. But the girder steel can block the node district stirrup, and the hole can influence the transmission of girder steel power on the girder steel. In addition, the PVC-FRP pipe is discontinuous in the node area, and the bearing capacity of the node can be weakened. Therefore, how to strengthen the node and ensure good stress performance of the node in a complex stress environment is a problem to be solved urgently.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a joint of a PVC-FRP pipe-steel pipe concrete column and a steel beam and a method thereof.
In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:
The joint comprises a PVC-FRP pipe, a column longitudinal rib, column stirrups, column steel pipes, shear studs, steel pipe internal concrete, steel pipe external concrete, joint area steel pipes, stiffening rib plates, hidden brackets, rectangular stirrups, trapezoidal stirrups, steel beams, high-strength bolts, flange connection plates, web connection plates and flanges.
PVC-FRP pipe cup joints in column steel pipe outer end lateral wall and passes through shear stud welding fastening along column steel pipe direction of height, the steel pipe circumferential direction welding stiffening rib board in the node district, column steel pipe passes through flange joint with the steel pipe in the node district, dark bracket welding is on the flange of node district steel pipe tip to pass through high strength bolted connection with the girder steel, rectangular stirrup buckles mutually through the stirrup opening with trapezoidal stirrup, and pours concrete and form buckle formula octagon ring beam, retrains node district concrete.
Preferably, the PVC-FRP pipe-steel pipe concrete column is any one of circular PVC-FRP pipe-circular steel pipe, circular PVC-FRP pipe-rectangular steel pipe, rectangular PVC-FRP pipe-circular steel pipe, rectangular PVC-FRP pipe-rectangular steel pipe and the like in cross section.
Preferably, the PVC-FRP pipe adopts any one of AFRP, BFRP, CFRP, GFRP and PFRP.
Preferably, the column steel pipe and the node area steel pipe can be made of steel materials with different materials, and the yield strength of the node area steel pipe is not lower than that of the column steel pipe.
Preferably, when the concrete in the steel pipe and the concrete outside the steel pipe are synchronously constructed, the concrete in the steel pipe and the concrete outside the steel pipe can be of the same strength grade, and the strength grade of the concrete in the steel pipe can be higher than that of the concrete outside the steel pipe.
Preferably, when the concrete in the steel pipe and the concrete outside the steel pipe are constructed in different periods, the concrete in the steel pipe can be high-strength concrete, and the strength grade is higher than that of the concrete outside the steel pipe.
Preferably, stiffening rib plates are uniformly arranged at intervals of 30 degrees along the circumference of the steel pipe at the outer side of the steel pipe in the node area, and the height of the stiffening rib plates is the same as that of the steel pipe in the node area.
Preferably, the height of the dark bracket is the same as that of the steel pipe in the node area, and the length of the dark bracket is not smaller than the waist length of the trapezoid stirrup.
Preferably, the trapezoidal stirrup and the rectangular stirrup form a clasp type reinforcement cage to replace the stirrup in the node area, the height and the width of the inner ring of the rectangular stirrup are respectively the same as the height and the width of the flange of the steel beam, and the trapezoidal stirrup and the rectangular stirrup form a clasp through the opening position of the stirrup.
The beneficial effects are that:
1. The node structure is simple, need not to set up the stirrup in the node district, can carry out local reinforcing to node district concrete through buckle formula steel reinforcement cage, improves node core district concrete strength and ductility.
2. The joint force transmission path is clear, the column PVC-FRP pipe only plays a role in restraining the concrete in the pipe, the shear-resistant stud can effectively improve the coordinated deformation capacity between the column steel pipe and the concrete, and the column steel pipe transmits the axial force, bending moment and shearing force to the joint core area; the node area steel pipe is welded with stiffening rib plates and the clasp ring beam can effectively improve the bending resistance and shearing bearing capacity of the node; the forces exerted by the steel beams are transferred to the nodes via the brackets.
3. The construction is simple and convenient, the PVC-FRP pipe can be used as a permanent column template, and the form removal is not required; the concrete in the steel pipe can be poured before the concrete outside the steel pipe, so that partial construction load can be borne; the rectangular stirrups and the trapezoidal stirrups form the clasp type reinforcement cage, so that holes or welding on the hidden brackets are avoided, and the construction sequence is simplified.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a joint between a PVC-FRP pipe-concrete filled steel tubular column and a steel beam;
FIG. 2 is a schematic cross-sectional view of a joint between a PVC-FRP pipe-concrete filled steel tubular column and a steel beam;
FIG. 3 is a sectional view of a PVC-FRP pipe-concrete filled steel tubular column;
FIG. 4 is a schematic perspective view of a node area;
FIG. 5 is a schematic plan view of a clasp ring beam;
the reference numerals in the drawings are as follows:
1-PVC-FRP pipe; 2-column longitudinal ribs; 3-column stirrups; 4-column steel pipes; 5-shear studs; 6-concrete in the steel tube; 7-concrete outside the steel pipe; 8-a steel pipe in the node area; 9-stiffening rib plates; 10-dark bracket; 11-rectangular stirrups; 1-trapezoidal stirrups; 13-steel beams; 14-high-strength bolts; 15-a flange connection plate; 16-web connection plates; 17-flange.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention relates to a connecting node of a PVC-FRP pipe-steel pipe concrete column and a steel beam, which is shown in figures 1-5, and comprises a PVC-FRP pipe 1, a column longitudinal rib 2, a column hoop rib 3, a column steel pipe 4, shear studs 5, steel pipe internal concrete 6, steel pipe external concrete 7, a node area steel pipe 8, a stiffening rib plate 9, a hidden bracket 10, a rectangular stirrup 11, a trapezoid stirrup 12, a steel beam 13, a high-strength bolt 14, a flange connecting plate 15, a web connecting plate 16 and a flange 17.
The PVC-FRP pipe 1-steel pipe concrete composite column is any one of circular PVC-FRP pipe-circular steel pipe, circular PVC-FRP pipe-rectangular steel pipe, rectangular PVC-FRP pipe-circular steel pipe, rectangular PVC-FRP pipe-rectangular steel pipe and the like in cross section, and FRP adopted by the PVC-FRP pipe 1 is any one of AFRP, BFRP, CFRP, GFRP and PFRP.
One specific application of this embodiment is: firstly, winding fiber reinforced composite (FRP) strips impregnated with epoxy resin glue on a PVC pipe at certain intervals, wherein the FRP strips are required to be tensioned in the winding process so as to ensure close contact between the FRP and the PVC pipe, and the width, the interval and the layer number of the FRP strips can be calculated and determined according to the design value of column bearing capacity. Curing the PVC-FRP pipe to epoxy resin glue for curing in a room temperature environment to form a PVC-FRP pipe 1, wherein the PVC-FRP pipe 1 is disconnected in a node area;
the PVC-FRP pipe 1 is sleeved on the side wall of the outer end of the column steel pipe 4 and is welded and fastened along the height direction of the column steel pipe 4 through shear studs 5, the node area steel pipe 8 is welded with stiffening rib plates 9 along the circumferential direction of the steel pipe, the column steel pipe 4 is connected with the node area steel pipe 8 through flanges 17, the hidden bracket 10 is welded on the flanges 17 at the end parts of the node area steel pipe 8 and is connected with the steel beam 13 through high-strength bolts 14, the rectangular stirrups 11 and the trapezoid stirrups 12 are buckled through stirrup openings, and concrete is poured to form a buckle-type octagonal ring beam, so that the concrete in the node area is restrained.
One specific application of this embodiment is: the steel structure manufacturing process is used for manufacturing column steel pipes 4, shear studs 5, node area steel pipes 8, stiffening rib plates 9, hidden brackets 10, steel beams 13, flange connecting plates 15, web connecting plates 16 and flanges 17. The shear studs 5 are welded on the column steel tube 4 at intervals of 90 degrees along the height of the column, and flanges 17 are welded at two ends of the column steel tube 4; the side surface of the steel pipe 8 in the joint area is welded with stiffening rib plates 9 at intervals of 30 degrees, flanges 17 are welded at two ends, column reinforcement cages are formed by binding column longitudinal ribs 2 and column hoop ribs 3, a PVC-FRP pipe 1 is installed, and the upper flange and the lower flange of the hidden bracket 10 are respectively welded on the flanges 17 at the upper end and the lower end of the steel pipe 8 in the joint area.
The steel materials of different materials can be adopted for the column steel pipe 4 and the steel pipe 8 in the joint area, the yield strength of the steel pipe 8 in the joint area is not lower than that of the column steel pipe 4, the concrete 6 in the steel pipe and the concrete 7 outside the steel pipe are synchronously constructed, the concrete 6 in the steel pipe and the concrete 7 outside the steel pipe can be of the same strength grade, the strength grade of the concrete 6 in the steel pipe can also be higher than that of the concrete 7 outside the steel pipe, the concrete 6 in the steel pipe can be of high strength concrete, the strength grade is higher than that of the concrete 7 outside the steel pipe, stiffening rib plates 9 are uniformly arranged at intervals of 30 degrees or 45 degrees along the circumference of the steel pipe outside the joint area, the height of the stiffening rib plates 9 is the same as that of the steel pipe 8 in the joint area, the height of the hidden bracket 10 is the same as that of the steel pipe 8 in the joint area, the length of the hidden bracket 10 is not less than the waist length of the trapezoid stirrup 12, the trapezoid stirrup 12 and the rectangular stirrup 11 form a clasp ring to replace the joint area stirrup, the rectangular stirrup 11, and the rectangular stirrup 11 and the trapezoid stirrup 11 form a trapezoid stirrup opening through the opening position of the trapezoid stirrup 13 and the rectangular stirrup 11.
The specific application of this embodiment is: the processed column steel pipe 4 and the joint area steel pipe 8 are fixedly connected through a flange 17 and a high-strength bolt 14. The rectangular stirrup 11 and the trapezoidal stirrup 12 are installed to form a clasp type reinforcement cage, and the steel beam 13 is connected with the hidden bracket 10 through a flange connecting plate 15, a web connecting plate 16 and a high-strength bolt 14. And supporting templates between the steel beams 13 Liang Zhi, reserving a protective layer for 15mm, pouring concrete 6 in the steel tube and concrete 7 outside the steel tube, and forming a joint between the PVC-FRP tube-steel tube concrete composite column and the steel beams.
In the description herein, reference to the terms "one embodiment," "example," "specific example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (8)
1. The utility model provides a PVC-FRP pipe-steel core concrete column and girder steel connected node which characterized in that: the steel pipe comprises a PVC-FRP pipe (1), a column longitudinal rib (2), a column hoop rib (3), a column steel pipe (4), shear-resistant studs (5), steel pipe inner concrete (6), steel pipe outer concrete (7), a node area steel pipe (8), stiffening rib plates (9), hidden brackets (10), rectangular hoops (11), trapezoidal hoops (12), steel beams (13), high-strength bolts (14), flange connecting plates (15), web connecting plates (16) and flanges (17);
The PVC-FRP pipe (1) is sleeved on the side wall of the outer end of the column steel pipe (4) and is welded and fastened along the height direction of the column steel pipe (4) through shear studs (5), the node area steel pipe (8) is welded with stiffening rib plates (9) along the circumferential direction of the steel pipe, the column steel pipe (4) is connected with the node area steel pipe (8) through flanges (17), the hidden bracket (10) is welded on the flanges (17) at the end parts of the node area steel pipe (8) and is connected with a steel beam (13) through high-strength bolts (14), the rectangular stirrups (11) are buckled with the trapezoid stirrups (12) through stirrup openings, and concrete is poured to form a clasp type octagonal ring beam so as to restrict the concrete in the node area;
The trapezoid stirrup (12) and the rectangular stirrup (11) form a clasp ring type reinforcement cage to replace the stirrup in the node area, the height and the width of the inner ring of the rectangular stirrup (11) are respectively the same as the height and the width of the flange of the steel beam (13), and the trapezoid stirrup (12) and the rectangular stirrup (11) form a clasp ring through the opening position of the stirrup.
2. The joint for connecting a PVC-FRP pipe-concrete filled steel tubular column and a steel beam according to claim 1, wherein: the PVC-FRP pipe (1) -steel pipe concrete composite column is any one of circular PVC-FRP pipe-circular steel pipe, circular PVC-FRP pipe-rectangular steel pipe, rectangular PVC-FRP pipe-circular steel pipe, rectangular PVC-FRP pipe-rectangular steel pipe and the like in cross section.
3. The joint for connecting a PVC-FRP pipe-concrete filled steel tubular column and a steel beam according to claim 1, wherein: the PVC-FRP pipe (1) adopts any one of AFRP, BFRP, CFRP, GFRP and PFRP.
4. The joint for connecting a PVC-FRP pipe-concrete filled steel tubular column and a steel beam according to claim 1, wherein: the column steel pipe (4) and the node area steel pipe (8) can be made of steel materials with different materials, and the yield strength of the node area steel pipe (8) is not lower than that of the column steel pipe (4).
5. The joint for connecting a PVC-FRP pipe-concrete filled steel tubular column and a steel beam according to claim 1, wherein: when the concrete in the steel tube (6) and the concrete outside the steel tube (7) are synchronously constructed, the concrete in the steel tube (6) and the concrete outside the steel tube (7) can be of the same strength grade, and the strength grade of the concrete in the steel tube (6) can be higher than that of the concrete outside the steel tube (7).
6. The joint for connecting a PVC-FRP pipe-concrete filled steel tubular column and a steel beam according to claim 1, wherein: when the concrete (6) in the steel pipe and the concrete (7) outside the steel pipe are constructed in different periods, the concrete (6) in the steel pipe can be high-strength concrete, and the strength grade is higher than that of the concrete (7) outside the steel pipe.
7. The joint for connecting a PVC-FRP pipe-concrete filled steel tubular column and a steel beam according to claim 1, wherein: and stiffening rib plates (9) are uniformly arranged at intervals of 30 degrees or 45 degrees along the circumference of the steel pipe at the outer side of the steel pipe (8) in the node area, and the height of the stiffening rib plates (9) is the same as that of the steel pipe (8) in the node area.
8. The joint for connecting a PVC-FRP pipe-concrete filled steel tubular column and a steel beam according to claim 1, wherein: the height of the dark bracket (10) is the same as that of the steel pipe (8) in the node area, and the length of the dark bracket (10) is not smaller than the waist length of the trapezoid stirrup (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210161978.0A CN114457917B (en) | 2022-02-22 | 2022-02-22 | PVC-FRP pipe-steel pipe concrete column and girder steel connected node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210161978.0A CN114457917B (en) | 2022-02-22 | 2022-02-22 | PVC-FRP pipe-steel pipe concrete column and girder steel connected node |
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| Publication Number | Publication Date |
|---|---|
| CN114457917A CN114457917A (en) | 2022-05-10 |
| CN114457917B true CN114457917B (en) | 2024-05-14 |
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| CN202210161978.0A Active CN114457917B (en) | 2022-02-22 | 2022-02-22 | PVC-FRP pipe-steel pipe concrete column and girder steel connected node |
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| CN106677340A (en) * | 2017-01-13 | 2017-05-17 | 沈阳建筑大学 | Flange plate type precast assembly type concrete hidden bracket dry type connecting system |
| CN206722094U (en) * | 2017-05-16 | 2017-12-08 | 中建一局集团建设发展有限公司 | A kind of rectangular steel-tube concrete column and beam and slab type superstructure attachment means |
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