Steel connection assembly type frame structure

Abstract

The utility model provides a steel connection assembly type frame structure which comprises a prefabricated column, a prefabricated beam and a prefabricated floor slab, and a column end connecting piece pre-buried in concrete is arranged in the prefabricated column. The part, extending out of the prefabricated column, of the column end connecting piece is provided with a column end upper flange, a column end horizontal support plate and a column end lower flange which are horizontally arranged in parallel from top to bottom. The column end upper flange and the column end lower flange are connected into a whole through a vertically-arranged column end web. The column end horizontal support plate is connected to the middle of the column end web. According to the utility model, the construction and installation difficulty is greatly reduced, and the beam-column joint is fast to assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction and relates to a steel-connected prefabricated frame structure. Background Technique

[0002] In precast concrete structures, the connection nodes between frame beams and frame columns generally adopt the method of post-casting with reserved notches. The steel bars of the frame beams and columns need to extend out for steel bar anchorage in the post-cast nodes to ensure the mechanical properties of the nodes. The above structure has reliable force transmission, but the connection structure is very complex, and the extended steel bars of the beams and columns collide with each other, resulting in great construction difficulty. Traditional precast columns need to be precast layer by layer, and the precast columns of each layer are connected by methods such as sleeve grouting, with cumbersome processes and low construction efficiency.

[0003] In addition, in traditional prefabricated projects, precast floor slabs mostly use steel bar truss composite slabs, and the upper steel bars of the composite slabs need to be tied on site before integral pouring. This method has a lot of wet operations and slow construction. Moreover, due to the thin thickness of the composite floor slab, its support spanning ability is poor, and a support frame still needs to be set under the slab. The increase in related processes not only leads to slow project progress but also increases the potential safety hazards for construction workers. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to solve the above problems and provide a steel-connected prefabricated frame structure.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A steel-connected prefabricated frame structure includes precast columns, precast beams, and precast floor slabs. The precast columns are provided with column end connectors embedded in concrete, and the part of the column end connectors extending outside the precast columns is provided with a column end upper flange, a column end horizontal support plate, and a column end lower flange that are horizontally arranged in parallel from top to bottom. The column end upper flange and the column end lower flange are connected into one body through a vertically arranged column end web; the column end horizontal support plate is connected to the middle of the column end web;

[0007] The ends of the precast beams are provided with beam end connectors embedded in concrete and extending outside; the part of the beam end connectors extending outside the precast beams is provided with a beam end upper flange, a beam end horizontal support plate, and a beam end lower flange that are horizontally arranged in parallel from top to bottom; the beam end upper flange and the beam end lower flange are connected into one body through a vertically arranged beam end web; the beam end horizontal support plate is connected to the middle of the beam end web; the precast floor slabs adopt composite floor slabs or fully precast floor slabs;

[0008] The connection between the precast column and the precast beam is stepped. When the precast column is connected to the precast beam, the horizontal bearing plate at the beam end is placed on the horizontal bearing plate at the column end. The upper flange at the beam end is butted against the end of the upper flange at the column end, and the lower flange at the beam end is butted against the end of the lower flange at the column end. The upper flange at the beam end and the upper flange at the column end, the lower flange at the beam end and the lower flange at the column end, and the web at the column end and the web at the beam end are all fixedly connected by welds.

[0009] Furthermore, there are column end connectors extending to the outside around the precast column, corresponding to connecting the precast beams on this side.

[0010] Furthermore, the upper beam reinforcement and the lower beam reinforcement in the precast beam are respectively welded to the upper flange and the lower flange at the beam end.

[0011] Furthermore, the upper floor reinforcement and the lower floor reinforcement extend outward longitudinally at both ends of the precast floor slab. The upper floor reinforcement has a hook and is lapped on the upper flange at the beam end. Grooves are provided on both transverse sides of the precast floor slab, and additional longitudinal reinforcement is provided on the grooves.

[0012] Furthermore, when two precast floor slabs are spliced transversely, additional structural short reinforcement is also provided in the grooves to bundle and connect the additional longitudinal reinforcement on the two precast floor slabs.

[0013] Furthermore, a number of post-cast concrete key grooves are provided at the end of the precast beam for fitting the post-cast concrete with the precast concrete. Reserved formwork holes are also provided on the precast beam for installing the casting formwork.

[0014] Furthermore, a plurality of column end connectors are arranged at intervals on the precast column, and each column end connector corresponds to a floor level; the column end connectors are welded and fixed to the steel skeleton of the precast column.

[0015] Furthermore, both the upper flange and the lower flange at the column end are cross-shaped, and each end of the cross shape corresponds to connecting a precast beam; the web at the column end is T-shaped, and a hollow structure is formed between a plurality of webs at the column end.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. In the present utility model, since the steel bar anchorage bars at the traditional beam-column connection joints are cancelled, the structure is greatly simplified, the construction and installation difficulty is significantly reduced, and the assembly of the beam-column joints is rapid. At the same time, the increase of the embedded connecting parts of the steel structure can ensure that the seismic performance of the beam-column connection joints is better than the traditional method, effectively improving the safety of the precast concrete structure.

[0018] 2. Different from the beam-column joint structure of conventional steel reinforced concrete, the utility model only sets a small amount of steel embedments in the column, ensuring the penetration and continuity of the longitudinal stressed steel bars in the column, greatly reducing the steel plate consumption, with good economy and high market acceptance. At the same time, the connectors used in the structure are all covered in the concrete, eliminating the fire protection and anti-corrosion measures, and the economy is better than that of traditional steel structure connection joints.

[0019] 3. In the utility model, the precast column does not need to reserve a post-cast area at the joint, so it has a large overall stiffness, can be precast continuously through multiple floors, and does not need to adopt the sleeve grouting method of conventional prefabricated structures, with excellent economy.

[0020] 4. The utility model adopts a fully precast floor slab, greatly improving the unpropped spanning ability of the precast slab. Through reliable structures at the slab ends and sides, the purpose of one-way continuous stress of the floor slab is achieved, and the integrity of the floor system is improved. At the same time, the utility model only needs to pour concrete in the local areas of the floor slab joints and beam ends, with extremely little on-site wet operation workload and greatly improved construction efficiency. Therefore, the utility model is very suitable for application scenarios where in-situ concrete pouring is not suitable, such as cold regions, plateau mountainous areas, etc.

[0021] 5. In the utility model, a detachable post-cast mold at the beam end is applied. The template material can be steel structure, aluminum alloy, polymer plastic, etc., which can quickly pour the joint and can be reused, being green and environmentally friendly with good economy.

[0022] Other advantages, objectives and features of the utility model will be described to some extent in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the utility model. The objectives and other advantages of the utility model can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to make the objectives, technical solutions and advantages of the utility model clearer, the utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0024] Figure 1 is the overall three-dimensional view of the steel connection prefabricated frame structure in the utility model.

[0025] Figure 2 is the front view of the connection between the precast beam and the precast column.

[0026] Figure 3 is the top view of the connection between the precast beam and the precast column.

[0027] Figure 4 is the schematic diagram of the structure of the precast column.

[0028] Figure 5 It is a schematic diagram of the embedded part of the column end connector.

[0029] Figure 6 It is a schematic diagram of the overall structure of the precast beam.

[0030] Figure 7 It is a schematic diagram of the embedded part of the beam end connector.

[0031] Figure 8 It is a schematic diagram of the overall structure of the precast slab.

[0032] Figure 9 It is a schematic diagram of the joint structure on the side of the precast slab.

[0033] Figure 10 It is a schematic diagram of the continuous force-bearing anchoring structure at the end of the precast slab.

[0034] Figure 11 It is a schematic diagram of the structure of the post-cast mold at the beam end.

[0035] Attached drawing symbols: 1 - precast column; 2 - precast beam; 3 - precast floor slab; 4 - column end connector; 5 - beam end connector; 31 - upper steel bars of the floor slab; 32 - lower steel bars of the floor slab; 33 - additional longitudinal steel bars; 34 - additional short structural steel bars; 41 - upper flange of the column end; 42 - horizontal support plate at the column end; 43 - lower flange of the column end; 51 - upper flange of the beam end; 52 - horizontal support plate at the beam end; 53 - lower flange of the beam end; 61 - integrated formwork; 62 - tie rod. Specific implementation manners

[0036] The following uses specific specific examples to illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0037] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and descriptions in the drawings may be omitted.

[0038] In the attached drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the attached drawings are only for illustrative purposes and cannot be understood as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] Please refer to Figures 1 to 11 , which is a steel-connected prefabricated frame structure, including a precast column 1, a precast beam 2 and a precast floor slab 3. A column-end connecting member 4 embedded in the concrete is arranged in the precast column 1. The part of the column-end connecting member 4 extending to the outside of the precast column 1 is provided with a column-end upper flange 41, a column-end horizontal support plate 42, and a column-end lower flange 43 that are horizontally arranged in parallel from top to bottom. The column-end upper flange 41, the column-end horizontal support plate 42, and the column-end lower flange 43 are connected into one body through a vertically arranged column-end web;

[0040] The end of the precast beam 2 is provided with a beam-end connecting member 5 embedded in the concrete and extending to the outside; the part of the beam-end connecting member 5 extending to the outside of the precast beam 2 is provided with a beam-end upper flange 51, a beam-end horizontal support plate 52, and a beam-end lower flange 53 that are horizontally arranged in parallel from top to bottom; the beam-end upper flange 51, the beam-end horizontal support plate 52, and the beam-end lower flange 53 are connected into one body through a vertically arranged beam-end web; the precast floor slab 3 is lapped on the beam-end upper flange 51;

[0041] The connection part between the precast column 1 and the precast beam 2 is in a stepped shape. When the precast column 1 is connected to the precast beam 2, the beam-end horizontal support plate 52 is placed on the column-end horizontal support plate 42. The beam-end upper flange 51 is butted against the end of the column-end upper flange 41, and the beam-end lower flange 53 is butted against the end of the column-end lower flange 43. The beam-end upper flange 51 and the column-end upper flange 41, the beam-end lower flange 53 and the column-end lower flange 43, and the column-end web and the beam-end web are all fixedly connected by welding.

[0042] There are column-end connecting members 4 extending to the outside around the precast column 1, corresponding to connecting the precast beam 2 on this side.

[0043] The upper beam reinforcement and the lower beam reinforcement in the precast beam 2 are respectively welded to the beam-end upper flange 51 and the beam-end lower flange 53.

[0044] The precast floor slab 3 extends outward longitudinally at both ends, with upper floor slab steel bars 31 and lower floor slab steel bars 32. The upper floor slab steel bars 31 are provided with hooks and overlap on the upper flange 51 of the beam end; grooves are provided on both lateral sides of the precast floor slab 3, and additional longitudinal steel bars 33 are provided on the grooves. When the one-way slab is continuously stressed at the end, the anchorage length of the upper floor slab steel bars 31 is la, and the anchorage length of the lower floor slab steel bars 32 is 100 mm, both meeting the requirements of relevant national codes such as JGJ1 - 2014 and JGJ3 - 2010.

[0045] When two precast floor slabs 3 are spliced transversely, additional structural short steel bars 34 are also provided in the grooves to tie and connect the additional longitudinal steel bars 33 on the two precast floor slabs 3, improving the integrity of the floor slab.

[0046] A plurality of post - cast concrete key grooves are provided at the end of the precast beam 2 for fitting the post - cast concrete with the precast concrete; reserved formwork holes are also provided on the precast beam 2 for installing the casting formwork.

[0047] A plurality of column - end connectors 4 are arranged at intervals on the precast column 1, and each column - end connector 4 corresponds to a floor layer; the column - end connectors 4 are welded and fixed to the steel skeleton of the precast column 1.

[0048] Both the upper flange 41 and the lower flange 43 of the column end are in a cross shape, and each end of the cross shape corresponds to connecting a precast beam 2; the column - end web is in a T shape, and a hollow structure is formed between multiple column - end webs, which can save steel.

[0049] The construction method of the steel - connected prefabricated frame structure in this embodiment includes the following steps:

[0050] (1) Precast the precast beam 2, precast column 1, and precast floor slab 3 in the factory; the precast column 1 is precast through multiple floors with full - height, and only the column - end connectors 4 are exposed at the height of each floor layer; the upper beam steel bars of the precast beam 2 are tied or welded in the factory, and the additional longitudinal steel bars 33 on the side of the precast floor slab 3 are tied in the factory.

[0051] (2) During construction, first hoist and place the precast column 1 in place, then hoist the precast beam 2, place the beam - end horizontal support plate 52 on the column - end horizontal support plate 42 for temporary support of the precast beam 2, and align the beam - end connectors 5 and the column - end connectors 4.

[0052] (3) Fix and connect the upper flange 51 of the beam end and the upper flange 41 of the column end, the beam - end horizontal support plate 52 and the column - end horizontal support plate 42, the lower flange 53 of the beam end and the lower flange 43 of the column end, and the column - end web and the beam - end web respectively by welding.

[0053] (4) Install the post-cast mold at the beam end on the precast beam 2. The post-cast mold at the beam end includes an integrated formwork 61 in a U shape and a tie rod 62 provided at the opening of the integrated formwork 61. The material of the integrated formwork 61 can be steel structure, aluminum alloy, polymer plastic, etc. Pass the tie rod 62 through the reserved formwork holes on the precast beam 2 and fix the integrated formwork 61, and pour the connection between the precast beam 2 and the precast floor slab 3;

[0054] (5) Lift and install the precast floor slab 3, and quickly arrange the additional structural short steel bars 34 at the side joint positions of the slab;

[0055] (6) Finally, pour the concrete in the slab joints and the local area at the beam end to form an integral structure.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A steel-connected prefabricated frame structure, comprising precast columns, precast beams and precast floor slabs, characterized in that: The precast column is provided with a column end connector embedded in the concrete, and the part of the column end connector extending to the outside of the precast column is provided with a column end upper flange, a column end horizontal support plate, and a column end lower flange that are horizontally arranged in parallel from top to bottom. The column end upper flange and the column end lower flange are connected into one body through a vertically arranged column end web; the column end horizontal support plate is connected to the middle of the column end web; The end of the precast beam is provided with a beam end connector embedded in the concrete and extending to the outside; the part of the beam end connector extending to the outside of the precast beam is provided with a beam end upper flange, a beam end horizontal support plate, and a beam end lower flange that are horizontally arranged in parallel from top to bottom; the beam end upper flange and the beam end lower flange are connected into one body through a vertically arranged beam end web; the beam end horizontal support plate is connected to the middle of the beam end web; the precast floor slab adopts a composite floor slab or a fully precast floor slab; The connection part between the precast column and the precast beam is in a stepped shape. When the precast column and the precast beam are connected, the beam end horizontal support plate is placed on the column end horizontal support plate, the end of the beam end upper flange is butted against the end of the column end upper flange, the end of the beam end lower flange is butted against the end of the column end lower flange, and the beam end upper flange and the column end upper flange, the beam end lower flange and the column end lower flange, and the column end web and the beam end web are all fixedly connected by welding seams.

2. The steel-connected prefabricated frame structure according to claim 1, wherein: There are column end connectors extending to the outside around the precast column, corresponding to connecting the precast beams on this side.

3. The steel-connected prefabricated frame structure according to claim 1, characterized in that: The upper beam reinforcement and the lower beam reinforcement in the precast beam are respectively welded to the beam end upper flange and the beam end lower flange.

4. The steel-connected prefabricated frame structure according to claim 1, characterized in that: The upper floor reinforcement and the lower floor reinforcement extend outward longitudinally at both ends of the precast floor slab. The upper floor reinforcement is provided with a hook and overlaps on the beam end upper flange; grooves are provided on both transverse sides of the precast floor slab, and additional longitudinal reinforcement is provided on the grooves.

5. The steel-connected prefabricated frame structure according to claim 4, wherein: When two precast floor slabs are spliced transversely, additional structural short reinforcement is also provided in the grooves to bundle and connect the additional longitudinal reinforcement on the two precast floor slabs.

6. The steel-connected prefabricated frame structure according to claim 1, wherein: The end of the precast beam is provided with a number of post-cast concrete key grooves for fitting the post-cast concrete and the precast concrete; the precast beam is also provided with reserved formwork holes for installing the casting formwork.

7. The prefabricated steel-connected frame structure according to claim 1, characterized in that: A plurality of column end connectors are arranged at intervals on the precast column, and each column end connector corresponds to a floor layer; the column end connectors are welded and fixed to the steel skeleton of the precast column.

8. The steel-connected prefabricated frame structure according to claim 7, characterized in that: Both the column end upper flange and the column end lower flange are in a cross shape, and each end of the cross shape corresponds to connecting a precast beam; the column end web is in a T shape, and a hollow structure is formed between a plurality of column end webs.

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