CN212001596U - Circular inner-opening large-span outer three-trimming double-roof laminated latticed shell system - Google Patents

Abstract

The utility model discloses a circular inner-opening large-span external three-trimming double-roof superposed latticed shell system, which comprises a central support framework, high and low roof latticed shell connecting web members and a gap-closed truss, wherein the central support framework is formed by relatively superposing a high roof latticed shell and a low roof latticed shell; the high and low roof reticulated shells are triangular reticulated shells which are formed by three external trimming edges after radial landing arc pipe trusses are arranged in a rotating and copying way and are connected by annular pipe trusses, and a circular opening is arranged at the center; the high and low roof reticulated shell connecting web members are positioned in the plane coincidence area of the high and low roof reticulated shells and are used for connecting the high roof reticulated shell and the low roof reticulated shell; the gap sealing truss is used for sealing and connecting the gap where the three outer trimming edges of the middle-high roof reticulated shell and the low roof reticulated shell meet. The utility model discloses the whole atress mode of coincide based on high, low roofing net shell to close through enclosing of breach closed truss and connect, the component is constituteed the module and is clear and definite, and the structure is reasonable, passes power clearly, has high bulk rigidity, high bearing capacity characteristics, and the range of application is wider.

Description

Circular inner-opening large-span outer three-trimming double-roof laminated latticed shell system

Technical Field

The utility model belongs to the technical field of structural engineering, especially, relate to a circular interior open-ended big outer three side cuts two roofing coincide latticed shell systems. The large span means a span of not less than 60 meters.

Background

The space pipe truss system is a novel space large-span truss structure which is composed of a large-section through main pipe and a plurality of small-section branch pipes which are welded with the large-section through main pipe and are regularly arranged, and is mainly applied to roof structure systems of large-span space buildings such as stadiums, airport lounges, exhibition halls and the like due to the light system, reasonable stress, large rigidity and beautiful appearance.

The ground arc space pipe truss system is an important space large-span structural form. Building roofs and side walls often involve more curved boundaries due to the need for building appearance. This kind of system is through carrying out the curve with roof pipe truss and extending to ground and carry out the support fixed, constitutes the unified pipe truss structural style of roof and side wall, based on whole system atress performance mode, makes it can stride across very big space span under the prerequisite of less dead weight, brings better scope of performance for building inner space's setting simultaneously.

When the space span is large, a single-layer latticed shell system consisting of the pipe trusses can generate members with large layer height and large size, the rigidity and the deformation deflection of the structural system cannot meet the standard requirements easily, and meanwhile great difficulty is brought to construction hoisting and welding operation. The multi-layer latticed shell system has the problems of large occupied space, complex nodes, poor building light transmission and the like due to dense components and heavy weight, so that the application of the multi-layer latticed shell system is also greatly limited. Therefore, a reasonable and effective design scheme of the latticed shell system is an important factor for ensuring the bearing performance and the implementation feasibility of the latticed shell system.

In a floor arc pipe truss system, the design scheme of the double-layer superposed latticed shell system can well overcome various defects of the pipe truss single-layer latticed shell system and the multi-layer latticed shell system. The system is connected through local web members in the overlapped areas of the two single-layer reticulated shell systems to form an integral stress system, and the non-overlapped areas are still single-layer reticulated shell systems respectively, so that the system has the advantages of light weight, large span and high rigidity.

In addition, when the double-layer laminated latticed shell system simultaneously relates to complex building functions such as large span, large overhang, large opening and the like, the structural system has the problems of more crossed members, complex assembly of parts, complex system stress performance, node strengthening treatment and the like, and the form design and the assembly scheme of the reasonable and effective laminated latticed shell system are also important factors for ensuring the bearing performance of the laminated latticed shell system.

In summary, it is necessary to research a form and a design method of a large-span external three-edge-cutting double-roof laminated latticed shell system with a circular inner opening so as to be suitable for a roof structure system and a bearing of a large-span complex space building with a circular open-air opening.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two roofing coincide latticed shell systems of three side cuts outside circular interior open-ended large span can realize the design of the room lid structural system of inside circular open-air large span complex space building and bear.

The structural system component module is definite, force transmission is clear, the design principle of integral stress and bearing mode is effectively met, the large rigidity and the light dead weight of the integral structural system are fully exerted, and meanwhile, the large-span space building modeling and functions of large span (span is not less than 60 meters), large overhang (overhang is not less than 20 meters) and large opening (opening is not less than 20 meters) are realized based on the superposition forming scheme of the high-low roof double-layer reticulated shell which is generated by the rotation of the floor arc-shaped pipe truss and is subjected to external trimming and internal circle opening treatment.

The utility model discloses a design is based on effective combination and the whole atress mode of the double-deck coincide screen shell of high-low roofing of interior round opening, outer three side cuts:

firstly, taking radially arranged floor arc space pipe trusses as basic units, copying and mutually connecting the basic units through central rotation to form a plurality of pipe trusses, and forming a high-low roof single-layer reticulated shell system meeting the requirements of architectural appearance modeling; secondly, performing boundary treatment on the high and low roof single-layer latticed shell systems by an inner circle opening and outer three trimming modes, and performing overlapping assembly according to a certain rule to effectively combine the high and low roof single-layer latticed shell systems into a double-layer overlapping latticed shell system in an integral stress mode; and finally, through nonlinear stability limit performance analysis and control of system deformation, component stress and the like, the integral stress bearing performance of the structural system is guaranteed, and instability damage is avoided.

In order to achieve the above objects and other related objects, the present invention adopts the following technical solutions:

a large-span external three-trimming double-roof superposed latticed shell system with a circular inner opening comprises a central support framework, high and low roof latticed shell connecting web members and a gap closed truss, wherein the central support framework is formed by oppositely superposing a high roof latticed shell and a low roof latticed shell;

the high roof reticulated shell and the low roof reticulated shell are both triangular reticulated shells, the triangular reticulated shells are made of radially-grounded arc-shaped pipe trusses through rotary replication and arrangement, and reticulated shells connected by annular pipe trusses are subjected to three external trimming, and a circular opening is formed in the center; the high and low roof reticulated shell connecting web members are positioned in the plane overlapping area of the high and low roof reticulated shells and are used for connecting the high roof reticulated shell and the low roof reticulated shell; the gap sealing truss is used for sealing and connecting a gap formed by the intersection of three outer trimming edges of the middle-high roof reticulated shell and the low roof reticulated shell of the central support framework.

Further, the radial floor arc-shaped pipe truss is rotationally copied at intervals of 3-8 degrees to generate a radial floor arc-shaped pipe truss assembly based on a central positioning point, and the radial floor arc-shaped pipe trusses of each high reticulated shell and each low reticulated shell are correspondingly positioned at the same radial position; the radial landing arc-shaped pipe trusses are connected through annular pipe trusses in a penetrating mode, grids are formed among the annular pipe trusses, and the distance between the grids is 3m-6 m.

Furthermore, the triangular latticed shell respectively adopts a regular triangle and an inverted triangle side line to carry out three outer side edges, the plane overlapping area of the central support framework is only arranged between the three outer side edges and the inner circle of the triangular latticed shell, and the shortest distance is not less than 4 meshes. 3 outer trimming edges of the triangular latticed shell are provided with externally-tangent-edge arc-shaped pipe trusses which are in a floor supporting mode at two ends.

Furthermore, the triangular latticed shell is also provided with 6 radial horizontal supports and 2 annular horizontal supports; the radial horizontal supports consist of chord layer internal diagonal support rods which are connected with two radial pipe trusses and form a path from an inner circle boundary to a ground, and 6 radial horizontal supports are respectively arranged on two sides of the ground end of the triangular reticulated shell; the circumferential horizontal supports are composed of internal diagonal support rods of the chord layer connecting two circumferential pipe trusses and the same chord layer, and the 2 circumferential horizontal supports are respectively arranged at the corners of the inner ring boundary and the outer ring arc pipe truss.

Furthermore, the overlapping area and the non-overlapping area of the double-layer overlapped latticed shell system are respectively in the form of a three-layer latticed shell and a single-layer latticed shell; the thickness of the three-layer reticulated shell is 1/12-1/20 of span, and corresponds to 1/36-1/60 of the thickness of the single-layer reticulated shell.

Furthermore, the cross section of the triangular latticed shell component is a circular tube, and the nodes are in through connection; the sizes of the main pipe and the branch pipe of the floor arc pipe truss are respectively 400-700 mm and 100-400 mm; when the connection strength of the intersecting joints is insufficient, the partition plates are additionally arranged to strengthen the joints.

Furthermore, the notch closed truss is positioned at six notches where three trimming edges outside the high and low reticulated shells meet, and a bidirectional truss system is formed by orthogonal arrangement of a radial plane truss and a circumferential plane truss; wherein, near one end of the high reticulated shell, the gap closed truss extends into the outer cut edge by 3m-10m, the end part is provided with an arc boundary plane truss, the plane position of the arc boundary plane truss is parallel to the plane position of the outer cut edge arc-shaped pipe truss, and the arc boundary plane truss is directly connected with the lower chord of the high roofing reticulated shell or is suspended and connected through a connecting web member; and the annular plane truss is positioned between the upper chord member and the lower chord member of the radial pipe truss of the low roof reticulated shell at one end close to the low reticulated shell and is connected with the externally tangent arc pipe truss in a penetrating way.

Furthermore, the distance between the radial plane trusses is 10-15 m, and the distance between the annular plane trusses is consistent with the distance between the annular pipe trusses of the triangular net shell. So as to meet the functional requirements of the building entrance of the large space at the bottom; the distance between the annular plane trusses is 3m-6m, and the annular plane trusses are arranged densely to increase the overall rigidity of the bidirectional truss system.

Furthermore, the steel supporting cylinder is positioned in a plane overlapping area at the intersection of the three trimming trusses outside the high and low reticulated shells. The steel supporting cylinder is positioned in four directions of the south and the north where three trimming edges of the high reticulated shell and the low reticulated shell are intersected, the steel supporting cylinder consists of a steel supporting cylinder vertical frame column, a steel supporting cylinder horizontal beam and a steel supporting cylinder diagonal web member support, and the structural form is a central supporting steel frame structure; the upper end of the steel support cylinder is used as a spherical hinge support of a node at a position corresponding to the lower chord layer of the low roof reticulated shell for vertical support; in order to meet the anti-seismic requirement, the support is in the form of an anti-seismic ball support, and the upper steel roof structure is separated from the lower steel support cylinder. Further, the arrangement of a steel support cylinder is an alternative; when the building span is not large and the integral rigidity of the double-layer superposed latticed shell system is enough, a steel supporting cylinder can be omitted, namely, the vertical internal support is not considered. When the building span is large and the integral rigidity is weak, the steel supporting cylinder can be used as a vertical supporting structure of a double-layer superposed latticed shell system, and can also be used as a building elevator and a stair well and lead to a sightseeing corridor for use.

Further, the interior circle opening size of double-deck coincide latticed shell system, three outer side cut positions all can suitably adjust according to the architectural modeling requirement, and wherein the three outer side cuts of high roofing latticed shell, low roofing latticed shell also can be regular isosceles triangle, the form of falling isosceles triangle respectively, can not influence the utility model discloses each part of double-deck coincide latticed shell system is constituteed and the mode of assembling.

The three-side-cut double-roof superposed latticed shell system with the circular inner opening and the large span is applied to design and bearing of a roof structure system of a large-span complex space building with an inner circular open-air opening, and the large-span complex space building is a large-space public civil building with the span not less than 60 meters and meeting the requirements of special building functions and special curved surface curtain wall modeling.

Through the technical scheme, the utility model discloses following beneficial effect has:

the utility model provides a two roofing coincide latticed shell systems of three side cuts outside circular interior open-ended large span, its structural system structure is reasonable, can realize the design of the roof structural system of inside circular open-air large span complex space building and bear, high bulk rigidity, the high bearing capacity advantage of the double-deck coincide latticed shell system of full play. The structure system takes a floor arc space pipe truss which is radially arranged as a basic unit, and forms a high and low roof reticulated shell which meets the requirements of building appearance modeling by central rotation replication and interconnection; based on the overlapped integral stress mode of the high and low roof reticulated shells processed by different external trimming edges and internal round opening boundaries, the method can span a very large space span on the premise of reducing the dead weight as much as possible. Based on nonlinear stability limit bearing capacity performance analysis, the utility model discloses a structure is convenient for through index control such as bulk stiffness (deformation value control), bearing capacity (stress ratio control), further guarantees the reasonable effective of overall structure system. The structural system has clear component modules, clear force transmission, high rigidity and high bearing capacity of the whole system, and has wide application prospect in a roof structural system of a large-span complex space building.

Drawings

The above advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are given by way of illustration only and do not limit the present invention, and in which:

fig. 1a-1d are respectively the structure schematic diagram, the high roofing latticed shell schematic diagram, the low roofing latticed shell schematic diagram, the high low roofing latticed shell connection web member schematic diagram of the circular inner open-ended outer three trimming double roofing overlapping latticed shell system embodiment of the utility model.

Fig. 1e and 1f are schematic diagrams of a notch closed truss and a steel support cylinder respectively.

FIG. 2 is a top plan view of an embodiment of the dual roofing overlapping reticulated shell system of the present invention, shown schematically at cut A-A in FIG. 1;

FIG. 3 is a sectional side view of an embodiment of the double-roof laminated latticed shell system of the present invention, namely a schematic diagram cut B-B in FIG. 1;

FIGS. 4a-4d are top plan expanded views of the upper chord layer, the lower chord layer, the upper chord layer and the lower chord layer of the high roofing latticed shell, respectively, of FIG. 2;

FIG. 5 is a C-C sectional view of the single radially grounded arcuate tubular truss of FIG. 2;

FIG. 6 is a D-D cross-sectional view of the single radially grounded arcuate tubular truss of FIG. 2;

FIG. 7 is a cross-sectional view E-E of the externally tangent arc tube truss of the high roofing lattice shell of FIG. 2;

FIG. 8 is a cross-sectional view F-F of the externally tangent arc tube truss of the low-roofing lattice shell of FIG. 2;

FIGS. 9a-9c are schematic structural views, sectional views G-G of a radial plane truss and sectional views H-H of a circumferential plane truss of the notched closed truss at the southwest corner of FIG. 2, respectively;

FIGS. 10a-10c are schematic structural views, J-J cross-sectional views, and K-K cross-sectional views, respectively, of the steel support cylinder at the southeast corner of FIG. 2;

fig. 11 is a flow chart of component assembly of an embodiment of the double-roof laminated latticed shell system, wherein the numbers are the component numbers.

In the drawings, the reference numerals denote the following components:

1. the high latticed shell radial pipe truss upper chord member; 2. a high reticulated shell radial pipe truss web member; 3. a high reticulated shell radial pipe truss lower chord; 4. the high net shell is annularly arranged on the upper chord of the truss; 5. a high reticulated shell ring truss web member; 6. the high reticulated shell is annularly provided with a truss lower chord; 7. the upper chord layer of the high latticed shell is radially and horizontally supported; 8. the high reticulated shell lower chord layer is supported horizontally in the radial direction; 9. the high net shell is annularly and horizontally supported by an upper chord layer and a lower chord layer; 10. the high reticulated shell outer ring lower chord layer is annularly and horizontally supported; 11. the high net shell inner ring upper chord layer is annularly and horizontally supported; 12. the high reticulated shell inner ring lower chord layer is annularly and horizontally supported; 13. the upper chord of the low latticed shell radial pipe truss; 14. a low reticulated shell radial pipe truss web member; 15. a lower chord of the low reticulated shell radial pipe truss; 16. the low reticulated shell is annularly provided with an upper chord of the truss; 17. a low reticulated shell ring truss web member; 18. the low reticulated shell is annularly provided with a truss lower chord; 19. the upper chord layer of the low latticed shell is radially and horizontally supported; 20. the lower chord layer of the low latticed shell is radially and horizontally supported; 21. the upper chord layer of the low reticulated shell is annularly and horizontally supported; 22. the lower chord layer of the outer ring of the low reticulated shell is annularly and horizontally supported; 23. the inner ring of the low reticulated shell is annularly and horizontally supported by the upper chord layer; 24. the lower chord layer of the inner ring of the low reticulated shell is annularly and horizontally supported; 25. the high-low reticulated shell is radially connected with the web members; 26. the high-low reticulated shell is annularly connected with the web member; 27. the gap seals the upper chord of the radial truss of the truss; 28. the gap seals the radial truss web member of the truss; 29. the gap seals the lower chord of the radial truss of the truss; 30. the gap seals the upper chord of the annular truss of the truss; 31. the gap seals the annular truss web member of the truss; 32. the gap seals the lower chord of the annular truss of the truss; 33. the gap seals the upper chord of the arc boundary truss of the truss; 34. the gap seals the arc boundary truss web member of the truss; 35. the gap seals the arc boundary truss lower chord of the truss; 36. the gap closed truss and the high-net shell boundary are connected with a web member; 37. the high-reticulated shell is externally tangent to the upper chord of the edge truss; 38. the high-reticulated shell is externally tangent to the truss web members; 39. the high-reticulated shell is externally tangent to the lower chord of the edge truss; 40. the low latticed shell is externally tangent to the upper chord of the edge truss; 41. the low latticed shell is externally tangent to the edge truss web members; 42. the low latticed shell is externally tangent to the lower chord of the edge truss; 43. a steel support cylinder vertical frame column; 44. a horizontal beam of a steel support cylinder; 45. the diagonal web members of the steel supporting cylinder support; 46. a support joint is converted at the top of the steel support cylinder; 47. and (6) positioning a central point.

Detailed Description

The technical solution of the circular inner-opening large-span outer three-trimming double-roof laminated latticed shell system according to the present invention will be described in detail with reference to the following specific embodiments and accompanying drawings.

The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.

The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the respective shapes and the mutual relationship thereof. It should be noted that for the sake of clarity in showing the structures of the various components of the embodiments of the present invention, the drawings are not drawn to the same scale. Like reference numerals are used to indicate like.

As shown in fig. 1a-1f and fig. 2 and 3, the utility model discloses a three outer side cut double-roof superimposed latticed shell systems of circular interior open-ended large span include high roofing latticed shell, low roofing latticed shell, high low roofing latticed shell connect web member and breach closed truss. The high roof reticulated shell (figure 1b) is positioned on the upper layer or the outer layer of the double-layer superposed reticulated shell system, and is a triangular reticulated shell formed by annular pipe truss connection and outer three-side cutting treatment on the basis of a plurality of radial floor arc pipe truss assemblies which are generated by rotating and copying at a certain angle center, and a circular opening is arranged at the center of the triangular reticulated shell; the low roof reticulated shell (figure 1c) is positioned at the lower layer or the inner layer of the double-layer superposed reticulated shell system, and the components are formed in the same way as the high roof reticulated shell and are oppositely superposed together to form a central supporting framework; the high and low roof reticulated shell connecting web members (fig. 1d) are positioned in a plane coincidence region between the high and low roof reticulated shells and are used for connecting the high roof reticulated shell and the low roof reticulated shell. The notch sealing truss (figure 1e) is positioned at six notches where the three outer cutting edges of the high and low roof reticulated shells meet and is used for sealing and connecting the notch where the three outer cutting edges of the high and low roof reticulated shells meet in the central support framework.

The above-mentioned relative superposition means that the high roof reticulated shell is positioned on the upper layer or outer layer of the central supporting framework, the low roof reticulated shell is positioned on the lower layer or inner layer of the central supporting framework, and the triangular reticulated shell forming the low roof reticulated shell and the triangular reticulated shell forming the high roof reticulated shell are in central symmetry.

Specifically, as shown in fig. 1b and fig. 4a-4b, the high roof reticulated shell uses a single radial falling arc-shaped pipe truss consisting of an upper chord 1 of the high reticulated shell radial pipe truss, a web member 2 of the high reticulated shell radial pipe truss and a lower chord 3 of the high reticulated shell radial pipe truss as a high reticulated shell basic unit; for a circular inner-opening double-layer superposed latticed shell system, the high latticed shell basic unit takes a central positioning point 47 as a rotation center, and is rotated and copied at certain intervals to generate a high latticed shell radial falling arc-shaped pipe truss assembly, wherein the interval angle is preferably 3-8 degrees.

As shown in fig. 1c and fig. 4c to 4d, the low roof reticulated shell uses a single radial floor arc pipe truss consisting of an upper chord 13 of the low reticulated shell radial pipe truss, a web member 14 of the low reticulated shell radial pipe truss and a lower chord 15 of the low reticulated shell radial pipe truss as a low reticulated shell basic unit; similarly, for a double-layer superposed latticed shell system with a circular inner opening, the low latticed shell basic unit also takes the central positioning point 47 as a rotation center, the interval angle is the same as that of the high roof latticed shell, and the low latticed shell radial falling arc-shaped pipe truss assembly is generated by rotating and copying. Each high reticulated shell basic unit and each low reticulated shell basic unit are positioned at the same radial position.

In the embodiment, the separation angle is 4.5 degrees, and the total number of the radial floor arc-shaped pipe trusses is 80.

As shown in fig. 1b-1c, based on the high-reticulated-shell radial-landing arc-shaped pipe truss assembly of the high-roofing reticulated shell, the basic units of each high-reticulated shell are connected through a high-reticulated-shell annular truss upper chord 4, a high-reticulated-shell annular truss web member 5 and a high-reticulated-shell annular truss lower chord member 6 in a penetrating manner to provide lateral support, and form an integral high-reticulated-shell stress structure, namely a triangular reticulated shell, wherein a circular opening is formed in the center of the triangular reticulated shell. Similarly, based on the low reticulated shell radial floor arc pipe truss assembly of the low roofing reticulated shell, the upper truss chord 16, the lower reticulated shell annular truss web member 17 and the lower truss chord 18 of the low reticulated shell annular truss are connected in a penetrating manner among the low reticulated shell basic units to provide lateral support, and form a low reticulated shell integral stress structure, namely a triangular reticulated shell, and similarly, a circular opening is arranged in the center of the triangular reticulated shell. And grids are formed among the annular pipe trusses, and the distance between the grids is 3-6 m.

The high-roofing latticed shell and the low-roofing latticed shell are oppositely overlapped to form a central support framework, and the radial floor arc pipe trusses of the high latticed shell and the low latticed shell are correspondingly positioned at the same radial position. As shown in fig. 1b-1c and fig. 2, the high roof reticulated shell and the low roof reticulated shell respectively adopt side lines of a regular triangle and an inverted triangle to carry out three-side trimming treatment, so that the overlapping area of the high roof reticulated shell and the low roof reticulated shell is only limited near the inner ring. Preferably, in order to improve the rigidity of the whole structural system, the distance between the center of each outer circle and the shortest overlapping area of the boundary of the inner circle opening is not less than 4 grid sizes.

As shown in fig. 1b and 7, 3 outer trimming edges of the high roof latticed shell are all arranged in a form of an outer trimming edge arc-shaped pipe truss to support the structural boundary so as to increase the boundary rigidity of the whole structure; the high-reticulated shell externally-tangent-edge arc-shaped pipe truss is in a two-end-grounded arc-shaped supporting mode and comprises a high-reticulated shell externally-tangent-edge truss upper chord 37, a high-reticulated shell externally-tangent-edge truss web member 38 and a high-reticulated shell externally-tangent-edge truss lower chord 39.

As shown in fig. 1c and 8, 3 outer trimming edges of the low-surface latticed shell are all arranged in a form of an outer trimming edge arc-shaped pipe truss to support the structural boundary; similarly, the low latticed shell external tangent edge arc-shaped pipe truss is in a two-end floor arc-shaped supporting mode and consists of a low latticed shell external tangent edge truss upper chord member 40, a low latticed shell external tangent edge truss web member 41 and a low latticed shell external tangent edge truss lower chord member 42.

As a preferable scheme, the sizes of the upper chord main pipe (37), the lower chord main pipe (39, 40, 42) and the web member branch pipe (38, 41) of the high reticulated shell external tangent edge arc-shaped pipe truss and the low reticulated shell external tangent edge arc-shaped pipe truss are preliminarily selected according to the sizes of the upper chord main pipe (1), the lower chord main pipe (3, 13, 15) and the web member branch pipe (2, 14) of the high reticulated shell and the low reticulated shell radial landing arc-shaped pipe truss, and finally determined through subsequent stress performance analysis.

As shown in fig. 2 and 4, the high roof reticulated shell and the low roof reticulated shell are further respectively provided with 6 radial horizontal supports and 2 annular horizontal supports, so as to respectively improve the torsional rigidity of the respective integral structural systems of the high roof reticulated shell and the low roof reticulated shell. The radial horizontal supports consist of chord layer internal diagonal support rods which are connected with two radial pipe trusses and form a path by extending an inner circle boundary to a falling position, and 6 radial horizontal supports are respectively arranged on two sides of three falling ends of a high roof reticulated shell and a low roof reticulated shell; each horizontal support of the high reticulated shell consists of a radial horizontal support 7 of an upper chord layer of the high reticulated shell and a radial horizontal support 8 of a lower chord layer of the high reticulated shell, and each horizontal support of the low reticulated shell consists of a radial horizontal support 19 of an upper chord layer of the low reticulated shell and a radial horizontal support 20 of a lower chord layer of the low reticulated shell.

The circumferential horizontal supports are composed of internal diagonal support rods of the chord layer connecting two circumferential pipe trusses and the same chord layer, and the 2 circumferential horizontal supports are respectively arranged at the corners of the inner ring boundary and the outer ring arc pipe truss. As shown in fig. 2 and 4, the inner circular circumferential horizontal supports are located on the same plane position of the inner ring, and include a high reticulated shell inner ring upper chord layer circumferential horizontal support 11, a high reticulated shell inner ring lower chord layer circumferential horizontal support 12, a low reticulated shell inner ring upper chord layer circumferential horizontal support 23 and a low reticulated shell inner ring lower chord layer circumferential horizontal support 24 of the high roofing reticulated shell. The outer circle circumferential horizontal supports are respectively arranged at 3 landing end arc-shaped corners of the high roof reticulated shell and the low roof reticulated shell and comprise a high reticulated shell outer ring upper chord layer circumferential horizontal support 9, a high reticulated shell outer ring lower chord layer circumferential horizontal support 10 of the high roof reticulated shell, a low reticulated shell outer ring upper chord layer circumferential horizontal support 21 and a low reticulated shell outer ring lower chord layer circumferential horizontal support 22 of the low roof reticulated shell.

As shown in fig. 1a and 1d, the web members for connecting the high and low roof reticulated shells are located between the high and low roof reticulated shells, and the plane position is an overlapping region (fig. 2) between the three outer trimming edges and the inner circular opening, as shown in fig. 1e, the web members for connecting the high and low roof reticulated shells include vertical web members for connecting the lower chord members of the high roof reticulated shell and the upper chord members of the low roof reticulated shell, and radial web members 25 and circumferential web members 26 for fixing the vertical web members. After the high and low roof reticulated shells are overlapped and connected into an integral system, the overlapped area is represented as a three-layer reticulated shell structure, and the non-overlapped area is represented as a single-layer reticulated shell structure.

After the high roof reticulated shell, the low roof reticulated shell and the high-low roof reticulated shell connecting web members are assembled, a finally formed single radial floor arc-shaped pipe truss basic unit consists of seven components, namely a high reticulated shell radial pipe truss upper chord member 1, a high reticulated shell radial pipe truss web member 2, a high reticulated shell radial pipe truss lower chord member 3, a high-low reticulated shell radial connecting web member 25, a low reticulated shell radial pipe truss upper chord member 13, a low reticulated shell radial pipe truss web member 14 and a low reticulated shell radial pipe truss lower chord member 15; the three-dimensional cutting type net shell comprises a high net shell local cutting type (figure 5), a low net shell local cutting type (figure 6) and a high-low net shell simultaneous local cutting type.

As a preferred scheme, the total thickness of the double-layer superposed latticed shell system is actually corresponding to the height of three latticed shell layers, including the height of a high roofing latticed shell layer, the height of a high roofing latticed shell connecting layer and the height of a low roofing latticed shell layer; the total thickness of the double-layer laminated reticulated shell system is preferably 1/12-1/20 of the total span, and the thickness corresponding to each single-layer reticulated shell is preferably 1/36-1/60. The cross section of the component of the double-layer superimposed reticulated shell system is generally in a circular tube shape, and the connecting nodes are corresponding intersecting connecting nodes; the size of a main pipe of the basic unit of the floor arc pipe truss is generally 400-700 mm, and the size of a branch pipe is generally 100-400 mm; the size of the branch pipe at the intersecting joint is generally not larger than that of the main pipe; when the connection strength of the intersecting joint is insufficient, the joint is reinforced by adding a partition plate and the like.

As an alternative, as shown in fig. 5 and 6, for the high-low roofing reticulated shell connecting web members, the radial connecting web members 25 of the high-low reticulated shell in the first mesh of the inner circle opening boundary may not be provided, so as to be used as the function of the annular sightseeing corridor in the building.

As shown in fig. 1e and 9, the notch-sealed truss is located at six notch positions where three cut edges outside the high and low reticulated shells meet, and is composed of a radial plane truss, an annular plane truss and an arc boundary plane truss, wherein the radial plane truss and the annular plane truss are orthogonally arranged to form a bidirectional truss integral stress system. The radial plane truss is composed of a radial truss upper chord member 27, a radial truss web member 28 and a radial truss lower chord member 29, the annular plane truss is composed of an annular truss upper chord member 30, an annular truss web member 31 and an annular truss lower chord member 32, and the arc boundary plane truss is composed of an arc boundary truss upper chord member 33, an arc boundary truss web member 34 and an arc boundary truss lower chord member 35.

As shown in fig. 1a, 1e, and 9, at each notch, the radial planar truss takes a central positioning point 47 as a rotation center, and is rotationally copied at a certain interval angle to generate a radial planar pipe truss assembly, the structural form is a floor arc pipe truss, and the interval angle is generally 3 to 8 degrees; in the embodiment, the separation angle is 6.0 degrees, and each gap is 4 radial plane trusses in total. The annular plane truss is arranged corresponding to the space between the radial floor arc pipe truss grids of the high and low roof net shells.

As shown in fig. 1a, 2 and 9, one end of the gap closed truss, which is close to the external tangent truss of the high roof latticed shell, is positioned at the inner side of the lower chord 3 of the radial pipe truss of the high roof latticed shell, and the gap closed truss is connected by the external tangent truss extending into the high roof latticed shell at a certain distance, wherein the extending range is 3m-10 m; the boundary of the gap closed truss close to one end of the high roof reticulated shell outer tangent side truss is provided with an arc boundary plane truss, and the lower end part of the arc boundary plane truss and the lower chord 3 of the radial pipe truss of the high roof reticulated shell are positioned on the same plane arc and can be directly connected with the same in a penetrating way; the plane position of the upper end part of the arc boundary plane truss is parallel to the plane position of the externally tangent edge arc-shaped pipe truss, and is in a disconnecting state with the radial pipe truss lower chord 3, the annular truss lower chord 6 and the externally tangent edge truss lower chord 36 of the high roof reticulated shell, and the gap closed truss is additionally arranged to be connected with the high reticulated shell boundary connecting web member 36 in a hanging, penetrating and welding mode.

As shown in fig. 1a, 2 and 9, one end of the gap-sealed truss, which is close to the outer tangent truss of the low roof reticulated shell, is located in the inner range between the upper chord 13 of the radial pipe truss and the lower chord 15 of the radial pipe truss of the low roof reticulated shell, and the ends of the radial plane truss and the annular plane truss are directly connected with the upper chord 40 of the outer tangent truss, the web member 41 of the outer tangent truss and the lower chord member 42 of the outer tangent truss of the outer tangent arc pipe truss of the low roof reticulated shell in a penetrating and welding manner.

As a preferred scheme, the radial plane truss and the annular plane truss are orthogonally arranged to form a bidirectional truss system and simultaneously bear the lateral and vertical load. The section of the member of the gap closed truss is also a circular tube section generally corresponding to the section of the main body member of the double-layer superposed latticed shell system, the member is relatively small in size due to relatively dense arrangement, the main pipe is generally 200-400 mm, and the branch pipe is generally 100-200 mm; the distance between the landing radial plane trusses is 10-15 m so as to meet the functional requirement of a building entrance of a large space at the bottom; the distance between the annular plane trusses is 3m-6m, and the annular plane trusses are arranged densely to increase the overall rigidity of the bidirectional truss system.

As shown in fig. 1a, 1f and 10, the steel support cylinder is located in a plane overlapping area near the intersection of the three trimming trusses outside the high and low reticulated shells, and can be divided into four plane orientations of southeast, southwest, northeast and northwest as shown in the figure; the steel support cylinder is composed of a steel support cylinder vertical frame column 43, a steel support cylinder horizontal beam 44 horizontally and annularly connected with the steel support cylinder vertical frame column 43, and a steel support cylinder diagonal web member support 45 obliquely supporting the intersection point of the steel support cylinder horizontal beam 44 and the steel support cylinder vertical frame column 43, and the structural form is a center support steel frame structure. The upper end of the steel support cylinder is vertically supported by a spherical hinge support arranged at a conversion support node 46 at the top of the steel support cylinder, namely a corresponding position node of a lower chord 15 of a low roofing reticulated shell, namely a low reticulated shell radial pipe truss; in order to meet the requirement of earthquake resistance, the support is in the form of an earthquake-resistant ball support, and the upper double-layer superposed reticulated shell roof structure is separated from the lower steel support cylinder.

As a preferred scheme, when the building span is large and the overall rigidity is weak, the steel supporting cylinder can be used as a vertical supporting structure of a double-layer superposed latticed shell system, and can also be used as a building elevator and a stair well and used for leading to a sightseeing corridor; but when the building span is not big and the integral rigidity of double-deck coincide latticed shell system is enough, also can not set up steel support section of thick bamboo, do not consider vertical inside support promptly.

As preferred scheme, the interior round opening size of double-deck coincide latticed shell system, three outside cut edge positions all can suitably adjust according to the building modeling requirement, and wherein the three outside cut edges of high roofing latticed shell, low roofing latticed shell also can be regular isosceles triangle, the form of falling isosceles triangle respectively, can not influence the utility model discloses each part of double-deck coincide latticed shell system is constituteed and the mode of assembling.

As shown in fig. 11, the welding process for assembling the concrete components of the double-layer superimposed reticulated shell system is as follows:

(1) the radial pipe truss upper chord member 1, the radial pipe truss web member 2 and the radial pipe truss lower chord member 3 form a high latticed shell floor arc pipe truss basic unit; the radial pipe truss upper chord 13, the radial pipe truss web member 14 and the radial pipe truss lower chord 15 form a low latticed shell floor arc pipe truss basic unit;

(2) the high-reticulated shell externally-tangent-edge arc-shaped pipe truss is composed of an externally-tangent-edge truss upper chord 37, an externally-tangent-edge truss web member 38 and an externally-tangent-edge truss lower chord 39; the external tangent truss upper chord member 40, the external tangent truss web member 41 and the external tangent truss lower chord member 42 form a low latticed shell external tangent arc-shaped pipe truss;

(3) the high latticed shell basic unit and the low latticed shell basic unit formed in the step (1) are respectively rotated and copied at the same angle at intervals by taking a central positioning point 47 as a rotating center to generate a high latticed shell ground arc-shaped pipe truss assembly and a low latticed shell ground arc-shaped pipe truss assembly; the annular truss upper chord members (4, 16), the annular truss web members (5, 17) and the annular truss lower chord members (6, 18) are respectively connected among the basic units of the high reticulated shell and the low reticulated shell to form a high reticulated shell integral structure and a low reticulated shell integral structure;

(4) respectively taking the high reticulated shell externally tangent side arc-shaped pipe truss formed in the step (2) and the low reticulated shell externally tangent side arc-shaped pipe truss as external trimming edges for the high reticulated shell integral structure and the low reticulated shell integral structure, and performing structural boundary cutting treatment;

(5) on the basis of the high latticed shell system and the low latticed shell system subjected to the outer edge cutting treatment in the step (4), the high latticed shell system is provided with upper and lower chord layer radial horizontal supports (7 and 8) and upper and lower chord layer circumferential horizontal supports (9, 10, 11 and 12), and the low latticed shell system is provided with upper and lower chord layer radial horizontal supports (19 and 20) and upper and lower chord layer circumferential horizontal supports (21, 22, 23 and 24) so as to improve the torsional rigidity of the whole structure;

(6) the plane superposition areas of the high reticulated shell system and the low reticulated shell system are connected with a radial connecting web member (25) and a circumferential connecting web member (26) to form an integral stress system of the double-layer superposed reticulated shell;

(7) the radial truss upper chord 27, the radial truss web members 28 and the radial truss lower chord 29 are assembled into a radial plane truss, and the annular truss upper chord 30, the annular truss web members 31 and the annular truss lower chord 32 are assembled into an annular plane truss; the radial plane truss and the annular plane truss are orthogonally arranged and assembled to form a gap closed truss;

(8) one end of the gap closed truss, which is close to the high latticed shell, is connected with the radial pipe truss lower chord member 3, the annular truss lower chord member 6 and the outer tangent truss lower chord member 36 of the high latticed shell through an arc boundary plane truss assembled by an arc boundary truss upper chord member 33, an arc boundary truss web member 34 and an arc boundary truss lower chord member 35 directly or through a connecting web member 36. One end of the gap closed truss, which is close to the low latticed shell, is directly connected to an upper chord 40 of the outer edge truss, a web member 41 of the outer edge truss and a lower chord 42 of the outer edge truss;

(9) the steel supporting cylinder vertical frame column 43, the steel supporting cylinder horizontal beam 44 and the steel supporting cylinder diagonal web member support 45 are assembled into a steel supporting cylinder, and the upper end of the steel supporting cylinder vertical frame column supports the double-layer superposed latticed shell system through a steel supporting cylinder top conversion support node 46.

The utility model also provides a circular interior open-ended big span outer three cut edge double roof coincide latticed shell system in the room lid structure system design of the circular open-air large-span complex space building of inside and bear the application in, the large-span complex space building is not less than 60 meters for the span and satisfies special building function, the figurative public civil engineering in large space of special curved surface curtain.

Compared with the prior art not enough, the utility model provides a pair of two roofing coincide latticed shell systems of three side cuts outside circular interior open-ended large span is based on the whole atress mode of coincide of the high, low roofing latticed shell that three side cuts outside through the difference, interior round opening border is handled to enclose through the breach and close the vertical braces with a steel support section of thick bamboo, can reach and stride across very big space span under the prerequisite of alleviateing oneself as far as possible. The structural system has clear component modules and clear force transmission, effectively accords with the design principle of integral stress and bearing mode, and can realize the design and bearing of roof structural systems with complicated large-span space building shapes and functions, such as large span (span not less than 60 meters), large overhang (overhang not less than 20 meters), large open holes (open holes not less than 20 meters) and the like. Based on nonlinear stability limit bearing capacity performance analysis, through whole deformation rigidity, stress ratio bear, overall performance control such as limit stability, can further ensure the utility model discloses high bulk rigidity, the high bearing capacity advantage of double-deck coincide latticed shell system.

The present invention is not limited to the above embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is included in the technical solution that is the same as or similar to the present invention.

Claims (9)

1. A circular large-span external three-trimming double-roof superposed latticed shell system with an inner opening is characterized by comprising a central support framework, high and low roof latticed shell connecting web members and a gap closed truss, wherein the central support framework is formed by oppositely superposing a high roof latticed shell and a low roof latticed shell;

the high roof reticulated shell and the low roof reticulated shell are both triangular reticulated shells, the triangular reticulated shells are made of radially-grounded arc-shaped pipe trusses through rotary replication and arrangement, and reticulated shells connected by annular pipe trusses are subjected to three external trimming, and a circular opening is formed in the center; the high and low roof reticulated shell connecting web members are positioned in the plane coincidence area of the high and low roof reticulated shells and are connected with the high roof reticulated shell and the low roof reticulated shell; the gap sealing truss is connected with a gap formed by intersection of three outer trimming edges of the middle-high roof reticulated shell and the low roof reticulated shell of the central support framework in a sealing manner.

2. The large-span three-edge-cut-outside double-roof laminated latticed shell system with the circular inner opening according to claim 1, wherein the radial floor arc-shaped pipe trusses are rotationally copied at intervals of 3-8 degrees to generate radial floor arc-shaped pipe truss assemblies based on a central positioning point, and the radial floor arc-shaped pipe trusses of each high latticed shell and each low latticed shell are correspondingly positioned at the same radial position; the radial landing arc-shaped pipe trusses are connected through annular pipe trusses in a penetrating mode, grids are formed among the annular pipe trusses, and the distance between the grids is 3m-6 m.

3. The large-span external three-edge-cutting double-roof overlapping latticed shell system with the circular inner opening according to claim 1, wherein the triangular latticed shell is subjected to external three-edge cutting by adopting side lines of a regular triangle and an inverted triangle respectively, a plane overlapping area of the central support framework is only arranged between the external three-edge cutting and the inner circle of the triangular latticed shell, and the shortest distance is not less than 4 meshes; 3 outer trimming edges of the triangular latticed shell are provided with externally-tangent-edge arc-shaped pipe trusses which are in a floor supporting mode at two ends.

4. The large-span external three-trimmed double-roof laminated latticed shell system with the circular inner opening according to claim 1, wherein the triangular latticed shell is further provided with 6 radial horizontal supports and 2 annular horizontal supports; the radial horizontal supports consist of chord layer internal diagonal support rods which are connected with two radial pipe trusses and form a path from an inner circle boundary to a ground, and 6 radial horizontal supports are respectively arranged on two sides of the ground end of the triangular reticulated shell; the circumferential horizontal supports are composed of internal diagonal support rods of the chord layer connecting two circumferential pipe trusses and the same chord layer, and the 2 circumferential horizontal supports are respectively arranged at the corners of the inner ring boundary and the outer ring arc pipe truss.

5. The large-span external three-edge-cutting double-roof laminated latticed shell system with the circular inner opening according to claim 1, wherein the overlapped area and the non-overlapped area of the double-layer laminated latticed shell system are respectively in a three-layer latticed shell form and a single-layer latticed shell form; the thickness of the three-layer reticulated shell is 1/12-1/20 of span, and corresponds to 1/36-1/60 of the thickness of the single-layer reticulated shell.

6. The large-span external three-edge double-roof superimposed latticed shell system with the circular inner opening according to claim 1, wherein the cross section of the triangular latticed shell component is a circular tube, and the nodes are in a form of intersecting connection; the sizes of the main pipe and the branch pipe of the floor arc pipe truss are respectively 400-700 mm and 100-400 mm; when the connection strength of the intersecting joints is insufficient, the partition plates are additionally arranged to strengthen the joints.

7. The large-span external three-trimmed double-roof laminated latticed shell system with the circular inner opening according to claim 1, wherein the notch closed trusses are positioned at six notches where the three external trims of the high latticed shell and the low latticed shell meet, and a bidirectional truss system is formed by orthogonal arrangement of radial plane trusses and annular plane trusses; wherein, near one end of the high reticulated shell, the gap closed truss extends into the outer cut edge by 3m-10m, the end part is provided with an arc boundary plane truss, the plane position of the arc boundary plane truss is parallel to the plane position of the outer cut edge arc-shaped pipe truss, and the arc boundary plane truss is directly connected with the lower chord of the high roofing reticulated shell or is suspended and connected through a connecting web member; and the annular plane truss is positioned between the upper chord member and the lower chord member of the radial pipe truss of the low roof reticulated shell at one end close to the low reticulated shell and is connected with the externally tangent arc pipe truss in a penetrating way.

8. The large-span external three-trimmed double-roof laminated latticed shell system with the circular inner opening according to claim 7, wherein the distance between the radial plane trusses is 10-15 m, and the distance between the circumferential plane trusses is consistent with the distance between the circumferential pipe trusses of the triangular latticed shell.

9. The large-span external three-trimmed double-roof overlapping latticed shell system with the circular inner opening according to claim 1, further comprising steel supporting cylinders positioned in plane overlapping regions at the intersection of the high and low latticed shell external three-trimmed trusses.

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