CN108104263A - A kind of novel fabricated steel-regeneration concrete combination frame structural system - Google Patents

Abstract

The invention discloses a novel assembled steel-recycled concrete hybrid frame structure system, which belongs to the field of structural engineering, and is characterized in that the frame column of the hybrid frame structure system adopts steel pipe recycled concrete columns, and the floor plate adopts profiled steel plate-partially recycled concrete The composite floor slab, that is, the concrete in the tension area is made of recycled concrete, and the beam-column joints are connected by unilateral high-strength bolt end plates, which can be assembled and disassembled. The structural system is light in weight, and fully utilizes the working characteristics of steel and recycled concrete. The joint structure is simple, the structural assembly rate is high, the construction is simple, and it has good mechanical performance and economic benefits. At the same time, the effective application of recycled concrete in the building frame structure system with a large number of engineering applications can realize the effective recycling of construction waste and fully reflect the development concept of sustainable civil engineering. The invention is applied to structural forms such as frames and frame shear walls, and is applicable to the main structural system of multi-layer or high-rise structures.

Description

A new fabricated steel-recycled concrete hybrid frame structure system

technical field

The invention relates to the structural technical field of civil engineering, and more specifically, relates to a novel assembled steel-recycled concrete hybrid frame structure system.

Background technique

The frame structure has the advantages of light weight and flexible space division. It can be used as the main structural system of multi-storey or high-rise structures. It is one of the most widely used structural forms in building construction. The common frame structure systems include concrete frame structure system, steel frame structure system and steel-concrete hybrid frame structure system. Among them, the concrete frame structure is mostly cast-in-place concrete frame, which has strong integrity but low assembly rate, slow construction speed and high energy consumption, which is not compatible with the national guidance of "vigorously developing prefabricated buildings"; the assembly rate of steel frame structure system High, the construction speed is fast, but there are defects of poor fire resistance and durability, high construction cost and later maintenance cost; the steel-concrete hybrid frame structure system uses steel-concrete composite components such as steel tube concrete components and steel-reinforced concrete components, The working characteristics of steel and concrete are fully utilized, and the assembly rate is high, but there are problems such as the complex structure of the joint area and the difficulty of construction. At the same time, as the scale of my country's construction market increases year by year, the output of construction waste is also gradually increasing. How to effectively deal with construction waste has become a prominent problem in my country's development. The birth and development of recycled concrete technology provides an effective way to reuse waste concrete, but the lack of performance and defects of recycled concrete restrict its application in actual construction projects.

Therefore, there is an urgent need for a new structural system with high assembly rate, simple construction, good mechanical performance and economic benefits, and can effectively utilize recycled concrete to meet the sustainable development requirements of construction waste recycling and building assembly and industrialization. .

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

Therefore, the present invention proposes that the novel assembled steel-recycled concrete hybrid frame structure system has high assembly rate, simple construction, good mechanical performance and economic benefits.

A novel assembled steel-recycled concrete hybrid frame structure system according to an embodiment of the present invention, including frame columns, composite floor slabs, and beam-column nodes, wherein:

The frame column is a steel pipe recycled concrete column, including hollow steel pipe and inner filled recycled concrete; each of the frame columns extends along the vertical direction, and a plurality of the frame columns are in multiple rows in the transverse direction, and in the longitudinal direction Arranged in multiple columns in the direction;

The composite floor is a profiled steel plate-partially recycled concrete composite floor. The composite floor is supported on the frame column and includes a frame beam and a panel body. The panel body includes a profiled steel plate, a recycled concrete layer, an ordinary concrete layer, Shear connectors and distributed reinforcement; the frame beam is a steel beam with an I-shaped section, consisting of an upper flange, a web and a lower flange; the frame beam is connected with profiled steel plates and shear connectors by welding; profiled steel plates Shear connectors are used to connect with the recycled concrete layer and ordinary concrete layer; the concrete part below the neutral axis of the composite floor is made of recycled concrete layer and reinforced according to the structure; the part above the neutral axis of the composite floor is made of ordinary concrete layer and equipped with distributed steel bars ;

Beam-column joint is a single-sided high-strength bolt-end plate connection joint, including frame columns, frame beams, end plates and single-side high-strength bolts; the frame beams are welded at the upper and lower flanges at the ends connected to the end plates Triangular plate; the frame beam and the end plate are welded by double-sided fillet welds; the hollow steel pipe of the frame column runs through the joints up and down, and the hollow steel pipe wall and end plate are correspondingly opened with bolt holes, and the single-sided high-strength bolts pass through from outside to inside The bolt holes reserved for the end plate and the hollow steel pipe wall, tighten the single-side high-strength bolts from the outside of the empty steel pipe to connect the end plate and the frame column; after the frame beam is installed, pour recycled concrete into the empty steel pipe of the frame column.

According to an embodiment of the present invention, the section of the hollow steel pipe in the frame column is circular, square or rectangular.

According to another embodiment of the present invention, the section form of the frame beam is a rolled I-shaped section or a welded I-shaped section; The width direction of the upper end of the end plate is consistent, and the width direction of the triangular plate along the lower flange is consistent with the width direction of the lower end of the end plate.

According to yet another embodiment of the present invention, the end plates of the nodes are extended end plates, and the cross-sectional shapes are arc-shaped and rectangular, respectively corresponding to circular steel tube recycled concrete columns and square steel tube recycled concrete columns; the end plates The length along the circumferential direction of the frame column is less than or equal to 1/4 of the outer perimeter of the frame column.

According to a further example of the present invention, the unilateral high-strength bolts of the nodes are special high-strength bolts that can be tightened and fixed on one side with a wrench or other installation tools.

According to yet another embodiment of the present invention, the cross-sectional form of the profiled steel plate of the composite floor is open, closed or narrowed; the shear connectors of the composite floor are studs; the concrete of the composite floor Part of it is prefabricated or cast-in-place in the factory, and the neutral axis is determined according to calculation. When pouring concrete, the recycled concrete layer is poured first, and the ordinary concrete layer is poured after the recycled concrete layer reaches a certain strength.

In some embodiments, the regeneration replacement rate of the recycled concrete used in the frame column and the recycled concrete layer used in the composite floor is not more than 50%, and the strength grade is RC30-RC60.

In some embodiments, the type of steel used for the hollow steel pipes in the frame columns, the frame beams and the profiled steel plates in the composite floor is Q235, Q345, Q420 or Q490.

The beneficial effects of the present invention are:

(1) Compared with the currently commonly used concrete frame structure, it has the advantages of high assembly rate, fast construction speed, and low energy consumption; compared with the currently commonly used steel frame structure, it has high bearing capacity, strong fire resistance and durability, Good economic benefits and other advantages; compared with the currently commonly used steel-concrete hybrid frame structure, it has the advantages of simple node structure, fast construction speed, and high resource utilization rate.

(2) The frame adopts unilateral high-strength bolt end plate connection nodes to realize the connection between steel tube recycled concrete columns and steel beams, which can be assembled and disassembled without on-site welding. The joint structure is simple, the force transmission is clear, and the installation accuracy is high, so that the structure has High assembly rate and construction efficiency.

(3) In the profiled steel plate-partially recycled concrete composite floor, the profiled steel plate is used as the permanent formwork of the concrete, which saves the process of setting up the formwork in the on-site construction, greatly improves the construction speed and reduces the construction cost; at the same time, the composite floor is convenient for laying pipelines, Make the structural system have good economy and applicability.

(4) The application of recycled concrete in the frame column of the load-bearing member of the building structure effectively improves its comprehensive utilization rate, which belongs to high-level utilization; at the same time, the application of recycled concrete in the composite floor slab greatly saves the use of ordinary concrete and reduces construction costs , so that the structure has a high utilization rate of construction waste resources and economic benefits. The effective application of recycled concrete in the building frame structure system with a large number of engineering applications has realized the effective recycling of construction waste, which fully reflects the development concept of sustainable civil engineering.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic diagram of a novel fabricated steel-recycled concrete hybrid frame structure system according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of connection nodes of a novel fabricated steel-recycled concrete hybrid frame structure system according to an embodiment of the present invention;

Fig. 3 is a top view of connection nodes of a novel fabricated steel-recycled concrete hybrid frame structure system according to an embodiment of the present invention;

Fig. 4 is a front view of connection nodes of a novel fabricated steel-recycled concrete hybrid frame structure system according to another embodiment of the present invention;

5 is a schematic diagram of a composite floor of a novel fabricated steel-recycled concrete hybrid frame structure system according to another embodiment of the present invention;

Fig. 6 is a sectional view along line A-A in Fig. 5 .

Reference signs:

100: A new fabricated steel-recycled concrete hybrid frame structure system;

10: frame column;

11: empty steel pipe; 12: recycled concrete;

20: Composite floor;

21: frame beam; 211: upper flange; 212: lower flange; 213: web; 214: triangular plate;

22: plate body; 221: profiled steel plate; 222: recycled concrete layer;

223: ordinary concrete layer; 224: shear connector; 225: steel bar;

30: Beam-column joint;

31: end plate; 32: single-sided high-strength bolt.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

A novel fabricated steel-recycled concrete hybrid frame structure system 100 according to an embodiment of the present invention will be described below with reference to FIGS. 1-6 .

As shown in FIGS. 1-6 , a novel fabricated steel-recycled concrete hybrid frame structure system 100 according to an embodiment of the present invention includes a plurality of frame columns 10 , a plurality of composite floors 20 and a plurality of beam-column nodes 30 .

Specifically, each frame column 10 extends along the vertical direction, a plurality of frame columns 10 are arranged in multiple rows in the transverse direction, and are arranged in multiple columns in the longitudinal direction, and the combined floor slab 20 is supported on the frame columns 10 .

Further, the composite floor slab 20 includes a frame beam 21 and a panel body 22, and a plurality of frame beams 21 are distributed in a plurality of different horizontal planes in the vertical direction, and each of the plurality of frame beams 21 distributed in the same horizontal plane is along the Extending horizontally or vertically, the two ends of each frame beam 21 are respectively connected to two adjacent frame columns 10; the plate body 22 includes a profiled steel plate 221, a recycled concrete layer 222, an ordinary concrete layer 223, a shear connector 224 and Rebar 225.

The hollow steel pipe 11 of the frame column 10 is transported to the construction site for installation after the factory prefabrication process is completed, and bolt holes are opened at the corresponding positions on the pipe wall of the steel pipe 11 according to the construction drawing, and the frame beam 21 is transported to the construction site after the factory prefabrication process is completed For installation, the cross section of the frame beam 21 can be processed by rolling or welding, and the end of the connection between the frame beam 21 and the frame column 10 is welded with a triangular plate 214 to reduce stress concentration and keep the plastic area away from the column surface.

The ends of the frame beam 21 and the end plate 31 are welded through double-sided fillet welds, and the end plate 31 is provided with bolt holes at corresponding positions according to the construction drawings. The high-strength bolts 32 pass through the end plate 31 and the pipe wall of the hollow steel pipe 11 sequentially from the outside to the inside, and are tightened from the outside of the steel pipe 11. After the unilateral high-strength bolt 32 is installed, pour recycled concrete 12 into the hollow steel pipe 11 of the frame column 10 .

When the composite floor 20 is constructed in the cast-in-place method, after the hollow steel pipe and the frame beam 21 are installed, the profiled steel plate 221 is then installed, and the profiled steel plate 221 and the frame beam 21 are connected by plug welding. A profiled steel plate 221 is added for temporary support. After the profiled steel plate 221 is laid, the shear connector 224 is positioned on the frame beam 21 according to the construction drawing. The shear connector 224 can be a stud, and the shear connector 224 is connected to the frame beam 21 by welding. After the installation of the connecting piece 224 is completed, the steel bar 225 is bound, and the recycled concrete 222 is poured first, and the ordinary concrete layer 223 is poured after the recycled concrete layer 222 reaches a certain strength. When the composite floor 20 adopts prefabricated slabs, the arrangement of the shear connectors 224, the pouring of the recycled concrete layer 222 and the ordinary concrete layer 223 are all completed in the factory, and the installation of the composite floor 20 is completed at the construction site.

Other configurations and operations of a novel fabricated steel-recycled concrete hybrid frame structure system 100 according to an embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation A specific feature, structure, material, or characteristic described by an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (8)

1. A kind of 1. novel fabricated steel-regeneration concrete combination frame structural system, which is characterized in that the combination frame system Including frame column (10), composite floor (20), bean column node (30), wherein：

   Frame column (10) is a kind of steel tube regeneration concrete column, including hollow steel tube (11) and interior fills out regeneration concrete (12)；Often A frame column (10) extends along vertical direction, and multiple frame columns (10) are in multiple rows of in a lateral direction, and It arranges on longitudinal direction in multi-column type；

   Composite floor (20) is a kind of profiled sheet-partial regeneration concrete combined floor (20), composite floor (20) branch Support on the frame column (10), including Vierendeel girder (21) and plate body (22), the plate body (22) including profiled sheet (221), Regeneration concrete layer (222), normal concrete layer (223), shear connector (224) and distribution bar (225)；The Vierendeel girder (21) it is a kind of I-shaped cross section steel beam, is made of top flange (211), web (213) and lower flange (212)；The Vierendeel girder (21) with the profiled sheet (221) and the shear connector (224) by being welded to connect；The profiled sheet (221) with It is connected between the regeneration concrete layer (222) and normal concrete layer (223) using the shear connector (224)；It is described The following concrete parts of composite floor (20) natural axis use the regeneration concrete layer (222), by constructional reinforcement；The combination Floor (20) natural axis above section is using the normal concrete layer (223) and configures the distribution reinforcing bar (225)；

   Bean column node (30) is a kind of unilateral High-Strength Bolt End-Plate Connection Joints (30), including the frame column (10), the frame It sets a roof beam in place (21), end plate (31) and unilateral high-strength bolt (32)；The end institute that the Vierendeel girder (21) connects in the end plate (31) It states and set square (214) is welded at top flange (211) and the lower flange (212)；The Vierendeel girder (21) and the end plate (31) It is welded using twin fillet wolt；The empty steel pipe (11) of the frame column (10) up/down perforation, sky at the node (30) Corresponding on steel pipe (11) tube wall and the end plate (31) to be provided with bolt hole, the unilateral high-strength bolt (32) passes through institute from outside to inside The bolt hole that end plate (31) is reserved with described empty steel pipe (11) tube wall is stated, the unilateral height is tightened on the outside of the empty steel pipe (11) Strength bolt (32) connects the end plate (31) and the frame column (10)；The Vierendeel girder (21) is after installation is complete, to the frame The regeneration concrete (12) is poured in the empty steel pipe (11) of trestle (10).
2. 2. a kind of novel fabricated steel-regeneration concrete combination frame structural system according to claim 1, feature exist In the section of the empty steel pipe (11) in the frame column (10) is circular, square or rectangle.
3. 3. a kind of novel fabricated steel-regeneration concrete combination frame structural system according to claim 1, feature exist In the section form of the Vierendeel girder (21) is rolling I-shaped cross-section or welding I-section section；Vierendeel girder (21) end Weld the set square (214), width and the end of the set square (214) along the top flange (211) in the portion edge of a wing The width of the upper end of plate (31) is consistent, width and the end of the set square (214) along the lower flange (212) The width of the lower end of plate (31) with it is consistent.
4. 4. a kind of novel fabricated steel-regeneration concrete combination frame structural system according to claim 1, feature exist In the end plate (31) of the node (30) is endplate connections (31), and cross-sectional shape is arc-shaped and rectangle, respectively corresponding circle Steel tube regeneration concrete column and square steel tube regeneration concrete column；The end plate (31) is small along the length of the frame column (10) circumferential direction In 1/4 of the outer perimeter equal to the frame column (10).
5. 5. a kind of novel fabricated steel-regeneration concrete combination frame structural system according to claim 1, feature exist In the unilateral high-strength bolt (32) of the node (30) is that can be tightened and be consolidated using spanner or other installation tools on one side Fixed special high-strength bolt.
6. 6. a kind of novel fabricated steel-regeneration concrete combination frame structural system according to claim 1, feature exist In the section form of the profiled sheet (211) of the composite floor (20) is open-type, closed type or necking type；The combination The shear connector (224) of floor (20) is peg；The concrete parts of the composite floor (20) are to be prefabricated in the factory or show It pours, natural axis is determined according to calculating, and during casting concrete, the regeneration concrete layer (222) is first poured, when the regeneration is mixed Solidifying soil layer (222) pours the normal concrete layer (223) again after reaching some strength.
7. 7. a kind of novel fabricated steel-regeneration concrete combination frame structural system according to claim 1, feature exist In the regeneration used in the regeneration concrete (12) and the composite floor (20) that are used in the frame column (10) The regeneration substitution rate of concrete layer (222) is no more than 50%, and strength grade is RC30~RC60.
8. 8. a kind of novel fabricated steel-regeneration concrete combination frame structural system according to claim 1, feature exist In the profiled sheet in empty steel pipe (11), the Vierendeel girder (21) and the composite floor (20) in the frame column (10) (221) model Q235, Q345, Q420 or Q490 of steel are used.