Connecting device for unequal-height sections of truss steel inclined struts and steel sections in SRC structure

Abstract

The utility model relates to a connecting device for a truss steel inclined strut and section steel in an SRC structure with unequal height. Beam section steel is horizontally arranged in the transverse direction, and column section steel is vertically arranged in the longitudinal direction; the first end of the beam profile steel is fixed to the left side of the column profile steel, and the center line of the beam profile steel is aligned with the center line of the column profile steel. The first end of the truss chord member is fixed to the right side of the columnar steel, and the center line of the truss chord member is aligned with the center line of the columnar steel. The first variable cross-section lower flange is fixed on the outer side of the lower end of the beam profile steel, and the second variable cross-section lower flange is fixed on the outer side of the lower end of the truss chord member; the first end part of the first truss steel inclined strut is fixedly connected with the first variable cross-section lower flange and the columnar steel; and the first end part of the second truss steel inclined strut is fixedly connected with the second variable cross-section lower flange and the columnar steel. According to the connecting device for the truss steel inclined strut and the section steel in the SRC structure with the unequal height, the use space in a building can be wider and more flexible; the use amount of profile steel is reduced, and the material cost is reduced to a certain extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building construction, especially to a connecting device for unequal height of truss steel diagonal bracing and internal section steel of SRC structure. BACKGROUND

[0002] With the vigorous development of national economy, people's demand for buildings is no longer limited to only meet its basic use function, but more and more pay attention to the individualized expression of building, and the traditional body shape regular building has been difficult to meet this demand. In recent years, a large number of experimental research work and the improvement of elastic-plastic analysis software calculation ability are carried out, which provide strong support for building innovation. Under this background, various complex body shape and complex structure system emerge in large numbers. Among them, large cantilever structure stands out with unique architectural expression and spatial integration ability, and becomes a popular choice to highlight the individualization of building.

[0003] For large cantilever structure, the key of its design and construction is the large cantilever part. If the large cantilever part adopts reinforced concrete structure, due to its large self weight, it will greatly increase the load of the main structure, which is not conducive to the development of structural design work. At the same time, in order to control the deformation, the section size of reinforced concrete structure is usually large, which seriously affects the use function of building. And for the complex large cantilever part, the construction difficulty is large, and the flexibility is insufficient. Therefore, reinforced concrete structure is not the first choice for large cantilever part. While steel structure has high strength and light weight, can better control the deformation, and the component can be prefabricated in factory and installed on site, which meets the demand of complex shape, and also has the advantages of high construction flexibility, convenient external period maintenance and reconstruction, etc. It is one of the ideal choices for large cantilever part.

[0004] When the large cantilever part adopts a truss structure, in order to ensure reliable connection of the large cantilever part and the main structure, various reinforcement measures are often adopted at the connection, such as that the column connected with the large cantilever part and the column adjacent to the column are both steel reinforced concrete columns, and the steel beam of the large cantilever part extends into the main structure adjacent to one span through the steel reinforced concrete form. In order to make the internal force of the truss structure uniform and reduce the internal force and cross-sectional size of the rod, a diagonal brace is usually added to the truss structure. In order to enhance the overall performance, the diagonal brace can extend into the main structure adjacent to one span. The current specification “Code for Design of Composite Structures JGJ 138-2016” in China stipulates that the diagonal brace is preferably a steel diagonal brace of H-shaped steel, a steel pipe or the like, and can also be a steel reinforced concrete diagonal brace or a steel pipe concrete diagonal brace, and the cross-sectional form thereof is preferably adapted to the beam-column joint and the cross-sectional form of the frame beam. Therefore, when the large cantilever structure is connected with the main structure, there is a connection structure, that is, the connection of the truss diagonal brace and the main structure. When the cross-sectional form of the diagonal brace is adapted to the beam-column joint and the cross-sectional form of the frame beam, the connection of the truss steel diagonal brace and the inner steel of the SRC (Steel Reinforced Concrete) structure is refined, and the SRC inner steel structure includes beam steel and column steel. Because the beam-column cross section of the steel reinforced concrete structure is usually limited by space, the cross-sectional size of the truss steel diagonal brace is often larger than that of the inner steel of the SRC structure, resulting in that the cross sections of the truss steel diagonal brace and the inner steel of the SRC structure are not equal in height, which is not conducive to the fixed installation of the truss steel diagonal brace and the inner steel of the SRC structure. Practical new type content

[0005] Based on the above description, the utility model provides a kind of connection device of truss steel diagonal brace and SRC structure inner steel cross section not equal height to solve the technical problem of truss steel diagonal brace and SRC structure inner steel cross section not equal height.

[0006] The technical scheme for solving the above technical problems of the utility model is as follows:

[0007] A kind of connection device of truss steel diagonal brace and SRC structure inner steel cross section not equal height, it is characterized by including: beam steel, column steel, truss chord, first truss steel diagonal brace, second truss steel diagonal brace, first variable cross-section lower flange and second variable cross-section lower flange;

[0008] The beam steel is horizontally arranged transversely, and the column steel is vertically arranged longitudinally;The first end of the beam steel is fixed to the left side of the column steel, and the center line of the beam steel is aligned with the center line of the column steel;The first end of the truss chord is fixed to the right side of the column steel, and the center line of the truss chord is aligned with the center line of the column steel;

[0009] The first variable cross-section lower flange is fixed to the outer side of the lower end of the beam steel, and the second variable cross-section lower flange is fixed to the outer side of the lower end of the truss chord; the first end of the first truss steel diagonal brace is welded and fixed to the first variable cross-section lower flange and the column steel; the first end of the second truss steel diagonal brace is welded and fixed to the second variable cross-section lower flange and the column steel.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore: a top reinforcing bar parallel to the beam steel is provided above the beam steel, and a bottom reinforcing bar parallel to the beam steel is provided below the beam steel;

[0012] The top reinforcement, beam steel, and bottom reinforcement of the beam are cast into a steel-concrete composite beam by pouring concrete.

[0013] Furthermore: the bottom reinforcement of the beam is directly connected to the first truss steel brace through a straight threaded sleeve; or, the bottom reinforcement of the beam is connected to the first truss steel brace through a node plate.

[0014] Furthermore: the column steel is provided with longitudinal reinforcement bars on all four sides; the column steel and the longitudinal reinforcement bars are cast into a steel-concrete composite column by concrete pouring.

[0015] Furthermore, multiple rows of studs are provided on the outer side of the beam and column steel sections.

[0016] Furthermore: the beam steel and column steel are configured as "I" shaped steel structures; the first truss steel diagonal brace and the second truss steel diagonal brace are configured as square steel structures.

[0017] Furthermore, the inner side of the column steel is provided with multiple stiffening plates.

[0018] Furthermore: the ratio of the variable cross-section width of the first variable cross-section lower flange to the variable cross-section length of the first variable cross-section lower flange is 1:4; the ratio of the variable cross-section width of the second variable cross-section lower flange to the variable cross-section length of the second variable cross-section lower flange is 1:4.

[0019] Compared with the prior art, the technical solution of this utility model has the following beneficial technical effects:

[0020] The truss steel inclined support and the SRC structure inner profile steel section non-equal height connecting device provided by the utility model, the SRC structure inner profile steel and the truss chord adopt the mode of local haunching, that is, the first variable cross-section lower flange is fixed outside the lower end of the beam profile steel, and the second variable cross-section lower flange is fixed outside the lower end of the truss chord. After the first variable cross-section lower flange and the first truss steel inclined support section are equal in height and the second variable cross-section lower flange and the second truss steel inclined support section are equal in height, welding and fixing are carried out. The truss steel inclined support and the SRC structure inner profile steel section non-equal height connecting device optimizes the cross-sectional size of the beam profile steel and the truss chord, can make the use space inside the building more spacious and flexible under the premise of not changing the building appearance size, reduces the profile steel consumption, and reduces the material cost to a certain extent. Meanwhile, the truss steel inclined support and the SRC structure inner profile steel section non-equal height connecting device reduce the self weight, and the foundation cost can be reduced accordingly. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 The truss steel inclined support and the SRC structure inner profile steel section non-equal height connecting device provided by the utility model embodiment is shown in the front view;

[0022] Fig. 2 The truss steel inclined support and the SRC structure inner profile steel section non-equal height connecting device provided by the utility model embodiment is shown in the side view;

[0023] Fig. 3 The truss steel inclined support and the SRC structure inner profile steel section non-equal height connecting device provided by the utility model embodiment is shown in the top view.

[0024] In the drawings, the component list represented by each sign is as follows:

[0025] 1-steel reinforced concrete beam, 2-steel reinforced concrete column, 3-beam profile steel, 4-column profile steel, 5-beam top steel bar, 6-beam bottom steel bar, 7-column longitudinal steel bar, 8-column stirrup, 9-node plate, 10-second truss steel inclined support, 11-bolt, 12-stiffened plate, 13-truss chord, 14-first variable cross-section lower flange, 15-second variable cross-section lower flange, 16-first truss steel inclined support. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings. The embodiments of the utility model are shown in the drawings. However, the utility model can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0028] It is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described is turned over in use, a relative prefiix term such as "lower", "bottom", "under", "underneath", "below", "upper", "top", "above", "over", or some other related terms could be used to describe the orientation of an element or feature that is, for example, below or on top of other elements or features. It is understood that the spatially relative terms are intended to encompass the various

[0029] It is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described is turned over in use, a relative prefiix term such as "lower", "bottom", "under", "underneath", "below", "upper", "top", "above", "over", or some other related terms could be used to describe the orientation of an element or feature that is, for example, below or on top of other elements or features. It is understood that the spatially relative terms are intended to encompass the various

[0030] As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is to be understood that the terms "comprising", "comprises" or "comprised of" or "has" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises, has or consists of a list of features or steps does not include only those features or steps but can include other features or steps not expressly listed or inherent to such process, method, article, or apparatus.

[0031] The utility model discloses a kind of connecting devices of unequal height of truss steel diagonal brace and SRC structure inner section steel section, see Figs. 1-3 It mainly includes: beam section steel 3, column section steel 4, truss chord 13, first truss steel diagonal brace 16, second truss steel diagonal brace 10, first variable cross-section lower flange 14 and second variable cross-section lower flange 15. For easy to express, in the utility model embodiment, define the left side of paper as direction left, the right side of paper as direction right, the upper side of paper as direction up, the lower side of paper as direction down, the side of paper close to author or reader as outside, the side of paper far from author or reader as inside. Based on the direction system defined above, the connection and positional relationship of the above-mentioned main components are as follows:

[0032] Both beam-type steel 3 and column-type steel 4 are I-shaped steel structures; the first truss steel diagonal brace 16 and the second truss steel diagonal brace 10 are square steel structures. Beam-type steel 3 is arranged horizontally, and column-type steel 4 is arranged vertically. The first end of beam-type steel 3 is welded and fixed to the left side of column-type steel 4, with the centerline of beam-type steel 3 aligned with the centerline of column-type steel 4. The first end of truss chord 13 is welded and fixed to the right side of column-type steel 4, with the centerline of truss chord 13 aligned with the centerline of column-type steel 4.

[0033] See Figs. 1-3 The first variable cross-section lower flange 14 is fixed to the outer side of the lower end of the beam steel 3, and the second variable cross-section lower flange 15 is fixed to the outer side of the lower end of the truss chord 13. In this embodiment, the ratio of the width to the length of the first variable cross-section lower flange 14 is 1:4; the ratio of the width to the length of the second variable cross-section lower flange 15 is also 1:4. The first end of the first truss steel diagonal brace 16 is welded and fixed to the first variable cross-section lower flange 14 and the column steel 4; the inner side of the first end of the first truss steel diagonal brace 16 is aligned with the inner side of the column steel 4, and the outer side of the first end of the first truss steel diagonal brace 16 is aligned with the outer side of the first variable cross-section lower flange 14. The first end of the second truss steel diagonal brace 10 is welded and fixed to the second variable cross-section lower flange 15 and the column steel 4; the inner side of the first end of the second truss steel diagonal brace 10 is aligned with the inner side of the truss chord 13, and the outer side of the first end of the second truss steel diagonal brace 10 is aligned with the outer side of the second variable cross-section lower flange 15. In order to ensure the normal transmission of horizontal force and increase the strength of the connection between the column steel 4 and other components, multiple stiffening plates 12 are provided on the inner side of the column steel 4. The number and thickness of the stiffening plates 12 can be selected according to actual needs.

[0034] To further enhance the structural strength of the connection device between the truss steel diagonal brace and the unequal height of the internal steel section of the SRC structure, see [reference needed]. Figs. 1-3 In a preferred embodiment of this utility model, a top beam reinforcement 5 parallel to the beam steel 3 is provided above the beam steel 3; a bottom beam reinforcement 6 parallel to the beam steel 3 is provided below the beam steel 3, and the bottom beam reinforcement 6 is directly connected to the first truss steel diagonal brace 16 through a straight threaded sleeve; when the bottom beam reinforcement 6 does not meet the anchorage length requirement, the bottom beam reinforcement 6 is connected to the first truss steel diagonal brace 16 through a node plate 9. The top beam reinforcement 5 and the bottom beam reinforcement 6 are arranged horizontally, and the number of top beam reinforcement 5 and bottom beam reinforcement 6 can be set according to the calculated structure. When multiple top beam reinforcement 5 or bottom beam reinforcement 6 are provided, the multiple top beam reinforcement 5 or bottom beam reinforcement 6 are equidistantly distributed and arranged in parallel. The top beam reinforcement 5, the beam steel 3, and the bottom beam reinforcement 6 are cast into a steel-concrete composite beam 1 by concrete pouring.

[0035] Similarly, to further increase the structural strength of the connection device between the truss steel diagonal brace and the unequal height of the internal steel section of the SRC structure, see [reference needed]. Figs. 1-3The preferred embodiment of the utility model provides still can make the following improvement: the four arounds of column type steel 4 are provided with column longitudinal reinforcement 7, the column longitudinal reinforcement 7 is vertically arranged up and down, and the column longitudinal reinforcement 7 is provided with annular column stirrup 8 at the periphery; the number of column longitudinal reinforcement 7 can be set according to the requirement, when setting multiple column longitudinal reinforcement 7, multiple column longitudinal reinforcement 7 is equidistantly distributed and is arranged in parallel. The column longitudinal reinforcement 7, the column stirrup 8 and the column type steel 4 are poured into the steel reinforced concrete column 2 by concrete.

[0036] To guarantee the reliable connection between beam type steel 3 and column type steel 4 and concrete, multiple rows of pegs 11 can also be welded on the outer side of beam type steel 3 and column type steel 4, and the spacing and specification of pegs 11 are determined by designers according to design requirements.

[0037] The truss steel diagonal brace and the connecting device of the unequal height of the SRC structure inner section steel section provided by the utility model embodiment have at least the following beneficial effects or advantages:

[0038] The truss steel diagonal brace and the connecting device of the unequal height of the SRC structure inner section steel section provided by the utility model embodiment, the SRC structure inner section steel and the truss chord are arranged in a local haunching mode, that is, a first variable cross-section lower flange is fixed on the outer side of the lower end of the beam type steel, and a second variable cross-section lower flange is fixed on the outer side of the lower end of the truss chord. After the first variable cross-section lower flange is equal in height with the first truss steel diagonal brace section and the second variable cross-section lower flange is equal in height with the second truss steel diagonal brace section, welding and fixing are carried out. The truss steel diagonal brace and the connecting device of the unequal height of the SRC structure inner section steel section, the cross-sectional size of the beam type steel and the truss chord is optimized, the use space inside the building can be more spacious and flexible under the premise of not changing the building appearance size. The amount of steel is reduced, and the material cost is reduced to a certain extent. At the same time, the self weight of the truss steel diagonal brace and the connecting device of the unequal height of the SRC structure inner section steel section is reduced, and the foundation cost can be correspondingly reduced.

[0039] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. A connecting device for connecting a truss steel diagonal brace to a non-equal height section of an inner profile steel of an SRC structure, characterized by: include: Beam-shaped steel, column-shaped steel, truss chords, first truss steel diagonal brace, second truss steel diagonal brace, first variable cross-section lower flange and second variable cross-section lower flange; The beam steel is arranged horizontally in the transverse direction, and the column steel is arranged vertically in the longitudinal direction; the first end of the beam steel is fixed to the left side of the column steel, and the center line of the beam steel is aligned with the center line of the column steel; the first end of the truss chord is fixed to the right side of the column steel, and the center line of the truss chord is aligned with the center line of the column steel. The first variable cross-section lower flange is fixed to the outer side of the lower end of the beam steel, and the second variable cross-section lower flange is fixed to the outer side of the lower end of the truss chord; the first end of the first truss steel diagonal brace is welded and fixed to the first variable cross-section lower flange and the column steel; the first end of the second truss steel diagonal brace is welded and fixed to the second variable cross-section lower flange and the column steel.

2. The connecting device of unequal height between the truss steel diagonal brace and the section of the inner profile steel of the SRC structure according to claim 1, characterized in that: The beam steel is provided with top reinforcing bars parallel to the beam steel above it, and bottom reinforcing bars parallel to the beam steel below it. The top reinforcement, beam steel, and bottom reinforcement of the beam are cast into a steel-concrete composite beam by pouring concrete.

3. The connecting device of unequal height between the truss steel diagonal brace and the section of the inner profile steel of the SRC structure according to claim 2, characterized in that: The bottom reinforcement bars of the beam are directly connected to the first truss steel diagonal brace via a straight threaded sleeve; or, the bottom reinforcement bars of the beam are connected to the first truss steel diagonal brace via a node plate.

4. The connecting device of unequal height between the truss steel diagonal brace and the section of the inner profile steel of the SRC structure according to claim 1, characterized in that: The column steel is surrounded by longitudinal reinforcement bars; the column steel and the longitudinal reinforcement bars are cast into a steel-concrete composite column by concrete pouring.

5. The connecting device of unequal height of truss steel bracing and inner section of SRC structure according to claim 1, characterized in that: The outer sides of the beam and column steel are provided with multiple rows of studs.

6. The connecting device of unequal height of truss steel diagonal brace and inner section of SRC structure according to claim 1, characterized in that: The beam and column steel are configured as I-shaped steel structures; the first truss steel diagonal brace and the second truss steel diagonal brace are configured as square steel structures.

7. The connecting device of unequal height between the truss steel diagonal brace and the section of the inner profile steel of the SRC structure according to claim 6, characterized in that: The inner side of the column steel is provided with multiple stiffening plates.

8. The connecting device of unequal height of truss steel diagonal brace and inner section of SRC structure according to claim 1, characterized in that: The ratio of the variable cross-section width of the first variable cross-section lower flange to the variable cross-section length of the first variable cross-section lower flange is 1:4; the ratio of the variable cross-section width of the second variable cross-section lower flange to the variable cross-section length of the second variable cross-section lower flange is 1:4.

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