Multi-arch three-dimensional truss floor support combined large-span roof structure and assembling method

Abstract

The present application relates to a kind of multi-arch three-dimensional truss floor support combination large-span roof structure and assembly method, including main structure and auxiliary structure;Main structure includes floor multi-arch three-dimensional truss combination, annular plane arc truss combination and large opening boundary arc arch beam;Auxiliary structure includes roof radial connection steel beam, boundary single-layer net shell and central single-layer net shell.The beneficial effects of the present application are: with floor multi-arch three-dimensional truss combination and annular plane arc truss combination combination as the form of multi-corner floor support combination large-span integral truss structure, the lateral support and central single-layer net shell of annular plane arc truss combination are realized by roof radial connection steel beam and central single-layer net shell, and large opening boundary arc arch beam and boundary single-layer net shell are used to realize the cantilever span expansion of large opening entrance boundary and constitute integral stress mode.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of structural engineering, and particularly relates to a multi-arch three-dimensional truss floor support combined large-span roof structure and an assembling method. BACKGROUND

[0002] The large-span truss roof system is a structural system composed of multiple single or multi-directional truss structures connected together, and has the advantages of light weight, large span and high bearing capacity, and is widely used in large-span space functions of large public buildings such as airport terminals, stadiums and other large public buildings, and building floors related to large-span indoor space functions.

[0003] The three-dimensional arch truss structure is a special case of the truss structure system, which is composed of a three-dimensional truss structure mainly through a spatial structure form. Compared with the plane truss structure, it has greater bending stiffness and is more suitable as the main bearing structure of the large-span floor roof. The arch form can effectively convert the vertical load into the axial force of the truss chord member, and has higher bearing capacity. The floor support form of the arch truss can effectively realize the overall integrity of the arc roof and the truss system. Therefore, the reasonable and effective setting of the three-dimensional arch truss structure arc, the number and the floor support form are an important factor for the bearing performance of the overall system.

[0004] Due to the boundary modeling and functional needs of the large opening entrance of the building, the three-dimensional arch truss often needs to be set as a diagonal facade form to realize the expansion of the spatial span, but at the same time causes the problem of weak lateral stability. The connection between the arch trusses is relatively a secondary span direction structure, and the use of a plane arc truss structure for rigid connection is a relatively reasonable and effective solution. Therefore, the reasonable and effective connection arrangement of the floor support arch three-dimensional arch truss and the plane arc truss is an important factor to ensure the stable bearing of the overall truss system. Through the large opening boundary arc arch beam, the main structure is composed of the three-dimensional arch truss, supplemented by a single-layer net shell structure, which can realize the further expansion of the radial large-span space of the roof surface.

[0005] In addition, the combined large-span roof structure system has the problems of complex node connection structure, complex component composition, bearing performance and stiffness, and the reasonable and effective design of the form and composition scheme of the multi-arch three-dimensional truss floor support combined large-span roof structure is also an important factor to ensure its bearing performance and normal use.

[0006] In summary, it is necessary to study the form and design method of the multi-arch three-dimensional truss floor support combined large-span roof structure to adapt to the multi-corner floor support combined building modeling roof structure system design and bearing of the bottom multi-directional large-span space, the roof multi-directional arc curved surface and the large opening entrance boundary structure. SUMMARY

[0007] The application aims to overcome the defects in the prior art and provide a multi-arch three-dimensional truss floor-supported combined large-span roof structure and an assembling method.

[0008] The multi-arch three-dimensional truss floor-supported combined large-span roof structure comprises a main structure and an auxiliary structure; the main structure comprises a floor-supported multi-arch three-dimensional truss combination, a circumferential plane arc truss combination and a large-opening boundary arc arch beam; the auxiliary structure comprises a roof radial connecting steel beam, a boundary single-layer net shell and a central single-layer net shell.

[0009] The floor-supported multi-arch three-dimensional truss combination comprises arc-shaped inverted triangular three-dimensional arch trusses, and the floor ends of the arc-shaped inverted triangular three-dimensional arch trusses are connected to each other to form a circumferential structure; the floor-supported multi-arch three-dimensional truss combination is provided with the large-opening boundary arc arch beam around the outer side, the floor-supported multi-arch three-dimensional truss combination and the large-opening boundary arc arch beam meet at the floor end, and the boundary single-layer net shell is arranged between the upper chord layer of the floor-supported multi-arch three-dimensional truss combination and the large-opening boundary arc arch beam.

[0010] The circumferential plane arc truss combination comprises outer ring plane arc trusses and inner ring plane arc trusses, which are arranged at staggered rotation angles along the circumferential direction; a plurality of outer ring plane arc trusses are arranged along the radial direction from the outside to the inside between adjacent two arc-shaped inverted triangular three-dimensional arch trusses; the innermost plurality of outer ring plane arc trusses are provided with the inner ring plane arc trusses; and the central single-layer net shell is arranged between the innermost plurality of inner ring plane arc trusses.

[0011] The circumferential plane arc truss is located on the inner side of the floor-supported multi-arch three-dimensional truss combination and constitutes the core support frame of the main structure; the roof radial connecting steel beam is arranged in the range of the circumferential plane arc truss combination and is arranged orthogonally to the plane arc truss as a lateral support member; the boundary single-layer net shell comprises radial connecting main inclined beams and circumferential connecting secondary beams; and the central single-layer net shell is a grid-shaped single-layer net shell structure arranged at an oblique angle.

[0012] Preferably, the plurality of arc-shaped inverted triangular three-dimensional arch trusses in the floor-supported multi-arch three-dimensional truss combination are arranged at rotation angles around a central positioning point, and the end portions of adjacent arc-shaped inverted triangular three-dimensional arches are fixed at the floor ends of the three-dimensional trusses.

[0013] Preferably, the inclined angle of the arc-shaped inverted triangular three-dimensional arch truss is 50-80°, the inclined angle of the large-opening boundary arc arch beam is 20-50°, the horizontal spacing between adjacent floor ends of the three-dimensional trusses is 100-150 m, the vertical height of the highest part of the middle of the arc-shaped inverted triangular three-dimensional arch truss is 20-30 m, and the vertical height of the highest part of the middle of the large-opening boundary arc arch beam is 15-25 m.

[0014] As preferred, the height of the single-pair arc-shaped inverted triangular solid arch truss is determined according to 1 / 25-1 / 20 of the span, and the cross section of the upper chord arch of the solid arch truss and the lower chord arch of the solid arch truss gradually decreases from the middle to both sides in a variable cross section form.

[0015] As preferred, the two ends of each pair of outer ring plane arc-shaped truss are rigidly connected to the adjacent two pairs of arc-shaped inverted triangular solid arch trusses through the outer ring truss upper chord connecting end and the outer ring truss lower chord connecting end.

[0016] As preferred, the inner ring plane arc-shaped truss is arranged in the space enclosed by the most inner several pairs of outer ring plane arc-shaped trusses, and several pairs of inner ring plane arc-shaped trusses are arranged along the radial direction from the outside to the inside between the adjacent two pairs of outer ring plane arc-shaped trusses; each pair of inner ring plane arc-shaped truss is rigidly connected to the most inner adjacent two pairs of outer ring plane arc-shaped trusses through the inner ring truss upper chord connecting end and the inner ring truss lower chord connecting end.

[0017] As preferred, the height of the outer ring plane arc-shaped truss and the inner ring plane arc-shaped truss is determined according to 1 / 25-1 / 20 of the span, and the greater of the height of the corresponding connecting solid arch truss; when the height of the plane arc-shaped truss is greater than the height of the corresponding connecting solid arch truss, the both end side slopes are contracted to the height of the connecting solid arch truss for connection.

[0018] As preferred, the upper chord layer of the ring-shaped plane arc-shaped truss combination is provided with one roof radial connecting steel beam for each axial net span; the lower chord layer of the ring-shaped plane arc-shaped truss combination is provided with one roof radial connecting steel beam for each 2-3 axial net spans, and each axial net span is 8-12 m.

[0019] As preferred, the roof radial connecting steel beam between the outer ring plane truss combination includes the outer ring upper chord steel beam and the outer ring lower chord steel beam; the roof radial connecting steel beam between the inner ring plane truss combination includes the inner ring upper chord steel beam and the inner ring lower chord steel beam; the setting interval of the outer ring lower chord steel beam is greater than that of the outer ring upper chord steel beam, and the setting interval of the inner ring upper chord steel beam and the inner ring lower chord steel beam is the same; the end of the roof radial connecting steel beam is hingedly connected.

[0020] As preferred, the radial connecting main inclined beam of the boundary single-layer net shell is continuously arranged in a V shape and is cross-connected with the ring-shaped connecting secondary beam through a rigid node; one radial connecting main inclined beam is provided with a through connection, and the ring-shaped connecting secondary beam is provided with a segmented rigid connection.

[0021] The central single-layer net shell includes the radial net shell steel beam and the ring-shaped net shell steel beam.

[0022] The assembling method of the multi-arch solid truss floor support combined large-span roof structure includes the following steps:

[0023] S1, a plurality of arc-shaped inverted triangular solid arch truss is arranged around the center positioning point at an angle array, and is intersected and fixedly supported by the solid truss floor end at both ends, to form a floor-supported multi-arch solid truss combination;

[0024] S2, a plurality of outer ring plane arc trusses is rigidly connected between the adjacent two arc-shaped inverted triangular solid arch trusses, and an inner ring plane arc truss is rigidly connected in the plurality of outer ring plane arc trusses at the innermost side, to form a ring plane arc truss combination, which further forms a core support frame of the main structure together with the floor-supported multi-arch solid truss combination of step S1.

[0025] S3, a roof radial connecting steel beam is arranged between the plurality of outer ring plane arc trusses parallel from the outside to the inside in the radial direction, and a roof radial connecting steel beam is also arranged between the plurality of inner ring plane arc trusses parallel from the outside to the inside in the radial direction.

[0026] S4, a plurality of large-opening boundary arc-shaped arch beams is arranged corresponding to the outside of the floor-supported multi-arch solid truss combination, the boundary arch beam floor end of the large-opening boundary arc-shaped arch beam and the solid truss floor end of the floor-supported multi-arch solid truss combination are intersected and combined node support, to form a large-opening boundary space structure of the main structure.

[0027] S5, a boundary single-layer net shell is arranged between the large-opening boundary arc-shaped arch beam and the floor-supported multi-arch solid truss combination at the top chord layer, and a central single-layer net shell is arranged between the plurality of inner ring plane arc trusses at the innermost side, to form a closed roof structure system.

[0028] Preferably, the facade inclination angles of the inner ring plane arc trusses and the outer ring plane arc trusses arranged from the inside to the outside in the radial direction increase in turn.

[0029] The beneficial effects of the present application are:

[0030] 1) The multi-arch solid truss floor-supported combination large-span roof structure provided by the present application has a reasonable structure system, can realize multi-directional large-span space at the bottom, multi-directional arc-shaped curved surface on the roof, and multi-corner floor-supported combination architectural modeling of the large-opening entrance boundary structure, and has the advantages of multi-directional large-span space at the bottom, high bearing stiffness, and multi-corner floor-supported combination architectural modeling of the large-opening entrance boundary of the combined large-span roof structure.

[0031] 2) The multi-arch three-dimensional truss floor-supported combined large-span roof structure of the present application is a multi-corner floor-supported combined large-span integral truss structure form combined with a floor-supported multi-arch three-dimensional truss combination and a circumferential plane arc-shaped truss combination, and achieves lateral support and central closed roof treatment of the circumferential plane arc-shaped truss combination through roof radial connecting steel beams and a central single-layer net shell, and achieves cantilever span expansion of the large-opening entrance boundary through a large-opening boundary arc-shaped arch beam and a boundary single-layer net shell to form an integral stress mode, which can achieve multi-corner floor-supported combined large-span roof architectural modeling and functions of bottom multi-directional large-span space, roof multi-directional arc-shaped curved surface, high bearing stiffness and large-opening boundary structure while reducing self-weight and ensuring bearing performance.

[0032] 3) Based on bearing performance analysis, the structure of the present application is convenient for stress control, lateral deformation control and period ratio control through indexes such as bearing capacity, overall lateral stiffness and torsional resistance, further ensuring the rationality and effectiveness of the overall structure system.

[0033] 4) The component composition module of the multi-arch three-dimensional truss floor-supported combined large-span roof structure of the present application is clear, the force transmission is clear, the overall system has large multi-directional span, high bearing stiffness, multi-corner floor-supported combined curved roof and beautiful entrance large-opening boundary modeling, and has a broad application prospect in the multi-corner floor-supported combined large-span roof structure system of bottom multi-directional large-span space, roof multi-directional arc-shaped curved surface and large-opening entrance boundary structure. BRIEF DESCRIPTION OF DRAWINGS

[0034] Fig. 1 is a structural schematic diagram of an embodiment of the floor-supported combined large-span roof structure of the present application (wherein Figure 1a is a whole structure schematic diagram of an embodiment of the multi-arch three-dimensional truss floor-supported combined large-span roof structure of the present application, Figure 1b is a floor-supported multi-arch three-dimensional truss combination schematic diagram, Figure 1c is a circumferential plane arc-shaped truss combination schematic diagram, Figure 1d is a roof radial connecting steel beam schematic diagram, Figure 1e is a large-opening boundary arc-shaped arch beam 23 schematic diagram, Figure 1f is a boundary single-layer net shell schematic diagram, Figure 1g is a central single-layer net shell schematic diagram);

[0035] Figure 2 is Figure 1a a A-A cross-sectional schematic diagram;

[0036] Figure 3 is Figure 1a a B-B cross-sectional schematic diagram;

[0037] Figure 4 is Figure 2 a C-C cross-sectional schematic diagram;

[0038] Figure 5 is Figure 2 is a schematic view of a multi-arch three-dimensional truss combination and a ring plane arc truss combination;

[0039] Figure 6 is a schematic view of a single multi-arch three-dimensional truss;

[0040] Figure 7a is a schematic view of a support node structure of a landing end or a landing end of a large opening boundary arc truss arch beam of a multi-arch three-dimensional truss combination, Figure 7b is Figure 7a is a D-D cross-sectional view of a support node;

[0041] Figure 8 is a schematic view of a node structure of a multi-arch three-dimensional truss combination or a ring plane arc truss combination (wherein Figure 8a is a steel truss node with vertical web members, Figure 8b is a steel truss node without vertical web members);

[0042] Figure 9 is a flow chart of a structure of a large-span roof structure embodiment of a landing support combination of the present application.

[0043] BRIEF DESCRIPTION OF DRAWINGS: three-dimensional truss upper chord arch 1, three-dimensional truss lower chord arch 2, three-dimensional truss horizontal member 3, three-dimensional truss vertical web member 4, three-dimensional truss diagonal web member 5, three-dimensional truss landing end 6, outer ring truss upper chord beam 7, outer ring truss lower chord beam 8, outer ring truss vertical web member 9, outer ring truss diagonal web member 10, outer ring truss upper chord connection end 11, outer ring truss lower chord connection end 12, inner ring truss upper chord beam 13, inner ring truss lower chord beam 14, inner ring truss vertical web member 15, inner ring truss diagonal web member 16, inner ring truss upper chord connection end 17, inner ring truss lower chord connection end 18, outer ring upper chord steel beam 19, outer ring lower chord steel beam 20, inner ring upper chord steel beam 21, inner ring lower chord steel beam 22, large opening boundary arc truss arch beam 23, boundary arch beam landing end 24, radial connection main diagonal beam 25, ring connection secondary beam 26, radial net shell steel beam 27, ring net shell steel beam 28, center positioning point 29, cross stiffening plate 30, vertical conversion stiffening plate 31, truss node stiffening plate 32. DETAILED DESCRIPTION

[0044] The present application will be further described below with reference to the embodiments. The following description of the embodiments is only to help understand the present application. It should be noted that for those skilled in the art, without departing from the principles of the present application, a number of modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0045] Example One

[0046] As an example, as Figures 1a to 8bAs shown, a multi-arch three-dimensional truss floor support combined large-span roof structure is proposed, the main structure includes: floor multi-arch three-dimensional truss combination, ring plane arc truss combination and large opening boundary arc arch beam 23. The multi-arch three-dimensional truss floor support combined large-span roof structure is applied in the design and bearing of the multi-angle floor support combined building modeling roof structure system of the bottom multi-direction large-span space, the roof multi-direction arc curved surface and the large opening entrance boundary structure, and the maximum structural space span is not less than 100 meters.

[0047] As shown in Figure 1b , Figures 2 to 4 , Figure 6 As shown, the floor multi-arch three-dimensional truss combination is located in the ring direction and is composed of three super-large-span inclined plane arc inverted triangular three-dimensional arch trusses arranged along the ring circumference; the component composition and structural arrangement of each inverted triangular three-dimensional arch truss are the same, and the inverted triangular three-dimensional arch trusses are arrayed by rotating a certain angle around the central positioning point 29, are symmetrically arranged in the ring direction, and are fixedly supported by being supported at both ends; two adjacent inverted triangular three-dimensional arch trusses share a three-dimensional truss floor end 6 and jointly constitute the main structure of the floor multi-arch three-dimensional truss. In this embodiment, the rotation array angle of the two adjacent inverted triangular three-dimensional arch trusses is 120°.

[0048] Each inverted triangular three-dimensional arch truss is composed of a three-dimensional truss top chord arch 1, a three-dimensional truss bottom chord arch 2, a three-dimensional truss horizontal rod 3, a three-dimensional truss vertical web rod 4 and a three-dimensional truss inclined web rod 5; at the three-dimensional truss floor end 6, the end members of the two adjacent inverted triangular three-dimensional arch trusses are connected at a point and are fixedly supported on the ground structure or the basement top plate structure.

[0049] As shown in Figure 1c , Figures 2 to 4 , Figure 5 As shown, the ring plane arc truss combination is located inside the floor multi-arch three-dimensional truss combination and jointly constitutes the core support framework of the main structure, and includes an outer ring plane arc truss and an inner ring plane arc truss, each group of outer ring and inner ring plane arc trusses is composed of multiple outer ring and inner ring diagonal plane arc trusses arranged at a certain distance along the radial direction, and the two ends of each outer ring and inner ring diagonal plane arc truss are connected to two adjacent inverted triangular three-dimensional arch trusses, and the two adjacent outer ring diagonal plane arc trusses at the innermost side are connected to each other.

[0050] Each outer ring diagonal plane arc truss is composed of an outer ring truss top chord beam 7, an outer ring truss bottom chord beam 8, an outer ring truss vertical web rod 9 and an outer ring truss inclined web rod 10; the two ends of each outer ring diagonal plane arc truss are rigidly connected to the adjacent two inverted triangular three-dimensional arch trusses through an outer ring truss top chord connecting end 11 and an outer ring truss bottom chord connecting end 12, and the connecting positions are the three-dimensional truss top chord arch 1 and the three-dimensional truss bottom chord arch 2.

[0051] Each inner ring skew-to-plane arc-shaped truss is composed of an inner ring truss top chord 13, an inner ring truss bottom chord 14, an inner ring truss vertical web 15 and an inner ring truss diagonal web 16. The two ends of each inner ring skew-to-plane arc-shaped truss are rigidly connected to the outermost adjacent two outer ring skew-to-plane arc-shaped trusses through an inner ring truss top chord connecting end 17 and an inner ring truss bottom chord connecting end 18, and the connecting position is the outer ring truss top chord 7 and the outer ring truss bottom chord 8.

[0052] The outer ring plane arc-shaped truss combination and the inner ring plane arc-shaped truss combination are staggered and arranged at a certain angle along the ring direction around the central positioning point 29 to form an overall connecting structure. In this embodiment, the angle of rotation along the ring direction is 60°.

[0053] The ring direction plane arc-shaped truss combination and the landing multi-arch three-dimensional truss combination jointly constitute the core support framework of the main structure.

[0054] As shown in Figure 1e , Figures 2 to 3 , the large-opening boundary arc-shaped arch beam 23 is located on the ring direction corresponding outer side of the landing multi-arch three-dimensional truss combination and is composed of three large-span skew facades arranged large-opening boundary arc-shaped arch beams 23. Each large-opening boundary arc-shaped arch beam 23 is fixed and supported through a boundary arch beam landing end 24 converging at the three-dimensional truss landing end 6, and the whole is a triangular landing support, forming a large-opening boundary space structure. The large-opening boundary arc-shaped arch beam 23 is not only a secondary main structure based on the landing multi-arch three-dimensional truss combination, but also a support structure of the ring direction multi-lateral boundary single-layer net shell.

[0055] The multi-arch three-dimensional truss landing support combination large-span roof structure system building constitutes a clear module, the force transmission is clear, and it meets the design principle of overall stress and bearing mode, fully utilizes the mechanical properties of multi-directional large-span space and high bearing capacity at the bottom of the overall structure, and is based on the multi-arch three-dimensional truss landing support combination and the ring direction plane arc-shaped truss combination combined multi-angle landing support combination large-span roof overall structure form.

[0056] Embodiment Two

[0057] As another embodiment, this embodiment two proposes a more specific multi-arch three-dimensional truss landing support combination large-span roof structure on the basis of embodiment one, and the auxiliary structure includes: a roof radial connecting steel beam, a boundary single-layer net shell and a central single-layer net shell.

[0058] As shown in Figure 1d , Figures 2 to 4As shown, the roof radial connection steel beams are arranged between the outer ring plane arc truss combinations and between the inner ring plane truss combinations; between the outer ring plane truss combinations, the outer ring upper chord steel beams 19 arranged at small intervals and the outer ring lower chord steel beams 20 arranged at large intervals are composed; between the inner ring plane truss combinations, the inner ring upper chord steel beams 21 and the inner ring lower chord steel beams 22 arranged at uniform intervals are composed. As the lateral support members of the ring plane arc truss combinations, they also serve as the roof bearing function;

[0059] The ends of the roof radial connection steel beams are hinged or bolted, and the outer ring upper chord steel beams 19, the outer ring lower chord steel beams 20, the inner ring upper chord steel beams 21 and the inner ring lower chord steel beams 22 at the connection do not need to be provided with inner partitions; on the upper chord layer of the ring plane arc truss, one roof radial connection steel beam is arranged per span of the axial net; on the lower chord layer of the ring plane arc truss, one roof radial connection steel beam is arranged per 2-3 span of the axial net, and when the inner ring area is small, the roof radial connection steel beams can also be arranged uniformly;

[0060] As shown in Figure 1f , Figures 2 to 4 , the boundary single-layer net shell is located between the upper chord layer of the ring multi-lateral large-opening boundary arc-shaped arch beam 23 and the floor-standing multi-arch three-dimensional truss combination, composed of radial connection main inclined beams 25 and ring connection secondary beams 26, forming a single-layer net shell structure.

[0061] The radial connection main inclined beams 25 are arranged in a V-shaped continuous manner and are connected to the ring connection secondary beams 26 through rigid nodes; the radial connection main inclined beams 25 are provided in a through manner, and the ring connection secondary beams 26 are provided in a segmented rigid connection manner.

[0062] As shown in Figure 1g , Figures 2 to 4 , the central single-layer net shell is located in the middle area and is composed of radial net shell steel beams 27 and ring net shell steel beams 28, arranged in a diagonal manner to form a grid-shaped single-layer net shell structure; the boundary ends of the central single-layer net shell are connected to the inner ring plane arc truss combination, forming a closed roof structure system.

[0063] The roof radial connection steel beams and the central single-layer net shell realize the lateral support of the ring plane arc truss combination and the closed roof treatment in the middle part, the large-opening boundary arc-shaped arch beam 23 and the boundary single-layer net shell realize the cantilever span expansion of the large-opening entrance boundary, and the structure system realizes the multi-corner floor supporting combination of large-span roof building modeling and function of the multi-directional large-span space at the bottom, the multi-directional arc-shaped curved surface of the roof, high bearing stiffness and large-opening boundary structure.

[0064] The vertical surface curvature and inclination angle of the landing multi-arch three-dimensional truss combination, the vertical surface curvature and inclination angle of the large opening boundary arc-shaped arch beam 23, the spacing and curvature of the ring-shaped planar arc-shaped truss combination, the outer expansion cantilever span of the boundary single-layer net shell, and the grid form of the central single-layer net shell can be adjusted according to the requirements of architectural modeling, functional space, multi-directional space span, and boundary conditions, and will not affect the component composition and assembly mode of the multi-arch three-dimensional truss landing support combined large-span roof structure of the present application.

[0065] Compared with the deficiencies of the prior art, the multi-arch three-dimensional truss landing support combined large-span roof structure of the present application is based on the multi-corner landing support combined large-span roof overall truss structure form combined by the landing multi-arch three-dimensional truss combination and the ring-shaped planar arc-shaped truss combination, realizes the lateral support and central closed roof treatment of the ring-shaped planar arc-shaped truss combination through the roof radial connection steel beam and the central single-layer net shell, realizes the cantilever span expansion of the large opening entrance boundary through the large opening boundary arc-shaped arch beam 23 and the boundary single-layer net shell, constitutes an overall stress mode, and can realize the multi-corner landing support combined architectural modeling roof structure system design and bearing of the bottom multi-directional large-span space, the roof multi-directional arc-shaped curved surface, and the large opening entrance boundary structure. Based on bearing performance analysis, through overall performance control such as component stress, deformation stiffness, and torsional period ratio, the multi-arch three-dimensional truss landing support combined large-span roof structure of the present application can further guarantee the advantages of multi-directional large-span space, high bearing stiffness, multi-corner landing combination curved roof, and entrance large opening boundary modeling.

[0066] It should be noted that the same or similar parts in this embodiment as in Embodiment One can be mutually referred to, and will not be described again in this application.

[0067] Embodiment Three

[0068] As another embodiment, Embodiment Three proposes a more specific multi-arch three-dimensional truss landing support combined large-span roof structure based on Embodiment Two.

[0069] The inclined vertical surface inclination angle of the single-arch arc-shaped inverted triangular three-dimensional arch truss is 50-80°, the horizontal spacing of the two landing ends of the three-dimensional arch truss is 100-150 m, and the vertical surface height at the highest part of the middle of the three-dimensional arch truss is 20-30 m; the height of the three-dimensional arch truss is determined according to 1 / 25-1 / 20 of the span, and is 4-6 m. In this embodiment, the vertical surface inclination angle of the three-dimensional arch truss is 60°, the horizontal spacing of the landing ends is 100 m, the vertical surface height at the highest part of the middle is 24 m, and the height of the three-dimensional arch truss is 4 m.

[0070] The single-span arc-shaped inverted triangular solid arch truss is in an outward convex arc shape in the plan view; the solid arch truss is the main supporting structure of the combined large-span roof structure, and the inclination angle of the facade cannot be less than 50° to avoid the overall overturning of the roof structure; the horizontal spacing of the landing ends of the solid arch truss is not less than 100 m to realize the longitudinal large-span building function; the facade height at the highest part of the middle part of the solid arch truss is not less than 20 m to limit the large-opening boundary arc-shaped beam 23 with the large-opening space function and to meet the requirement of the internal space height.

[0071] All the rod sections of the single-span arc-shaped inverted triangular solid arch truss are circular steel tube sections, wherein the diameters of the circular steel tube sections of the upper chord arch 1 and the lower chord arch 2 of the solid truss are 1000-1500 mm, and the sections gradually decrease from the middle part to both sides; the single-span arc-shaped inverted triangular solid arch truss is connected at the landing end 6 of the solid truss by two upper chord arches and one lower chord arch, and the inside of the support node is provided with a cross stiffener plate 30 and a vertical conversion stiffener plate 31 for diaphragm reinforcement, and is rigidly fixed and supported on the ground structure. In this embodiment, the maximum diameter of the circular steel tube of the upper chord arch 1 and the lower chord arch 2 of the solid truss is 1200 mm at the middle section.

[0072] The heights of the outer ring planar arc truss and the inner ring planar arc truss are determined according to the larger one of 1 / 25-1 / 20 of the span and the height of the corresponding connecting solid arch truss; when the height of the planar arc truss is greater than the height of the corresponding connecting solid arch truss, the slopes at both ends are contracted to the height of the connecting solid arch truss for connection; the inclination angles of the planar arc trusses arranged from the inside to the outside along the radial direction gradually increase; the connection mode of the planar arc truss and the solid arch truss is that the circular steel tube rods are connected in penetration, the H-shaped steel is connected by bolting and welding, and an inner diaphragm is additionally arranged at the connecting node for reinforcement to realize rigid node connection. In this embodiment, the rods are connected in penetration.

[0073] The maximum span of the single-span outer ring planar arc truss and the inner ring planar arc truss is located in the middle part, and is symmetrically distributed on both sides, with a span of 60-100 m, a circular steel tube section or an H-shaped steel section, a circular steel tube diameter or an H-shaped section height of 300-600 mm, and a planar arc truss height of 3-6 m; a truss node stiffener plate 32 is arranged at the node for reinforcement. In this embodiment, the heights of the outer ring and the inner ring planar arc trusses in the middle part are both 4 m.

[0074] The facade inclination angle of the large opening boundary arc-shaped arch beam 23 is 20-50°, which is smaller than that of the multi-arch three-dimensional truss combination, so as to further expand the radial large-span space; the highest facade height of the middle part of the large opening boundary arc-shaped arch beam 23 is 15-25 m; and the section of the component of the large opening boundary arc-shaped arch beam 23 is a circular steel pipe with a diameter of 800-1200 mm. In the embodiment, the facade inclination angle of the large opening boundary arc-shaped arch beam 23 is 27°.

[0075] The roof radial connecting steel beam is a lateral support component of the oblique plane arc-shaped truss and is also a bearing component of the vertical load of the roof; the roof radial connecting steel beam is arranged according to the axis network span, and each axis network span is 8-12 m. In the embodiment, each axis network span is 8 m, and one root is arranged in a small interval of every 8 m and a large interval of every 16 m in the upper chord layer and the lower chord layer respectively to be connected and arranged.

[0076] The section of the roof radial connecting steel beam is a circular steel pipe or an H-shaped section steel, and the diameter of the circular steel pipe or the height of the H-shaped section steel is 400-600 mm.

[0077] The section of the component of the boundary single-layer net shell is a circular steel pipe with a diameter of 300-600 mm.

[0078] The section of the component of the central single-layer net shell is a circular steel pipe or a box section with a diameter or side length of 200-500 mm.

[0079] It should be noted that the same or similar parts in the embodiment and embodiment two can be mutually referred to, and will not be described herein.

[0080] Embodiment Four

[0081] As another embodiment, the assembly method of the multi-arch three-dimensional truss landing support combination large-span roof structure proposed in embodiment three is shown in FIG. 8, and the specific process is as follows: Figure 9

[0082] S1, the three-dimensional truss upper chord arch 1, the three-dimensional truss lower chord arch 2, the three-dimensional truss horizontal rod 3, the three-dimensional truss vertical web rod 4 and the three-dimensional truss inclined web rod 5 form a single-fraction arc-shaped inverted triangular three-dimensional arch truss;

[0083] The rotation angle array is arranged around the central positioning point 29, and forms three arc-shaped inverted triangular three-dimensional arch trusses with multiple sides, and the two ends of the three-dimensional truss landing end 6 are intersected and fixedly supported two by two; the cross stiffener plate 30 and the vertical conversion stiffener plate 31 are arranged at the support node of the three-dimensional truss landing end 6 to be strengthened;

[0084] ​S2, the outer ring truss upper chord beam 7, the outer ring truss lower chord beam 8, the outer ring truss vertical web member 9, the outer ring truss diagonal web member 10 constitute a single outer ring plane arc truss, the node is provided with a truss node stiffener plate 32 for reinforcement, and each truss is rigidly connected to adjacent two arc-shaped inverted triangular three-dimensional arch trusses through the outer ring truss upper chord connecting end 11 and the outer ring truss lower chord connecting end 12 at both ends of the truss;

[0085] The inner ring truss upper chord beam 13, the inner ring truss lower chord beam 14, the inner ring truss vertical web member 15 and the inner ring truss diagonal web member 16 constitute a single inner ring plane arc truss, the node is provided with a truss node stiffener plate 32 for reinforcement, and each truss is rigidly connected to adjacent two outer ring plane arc trusses through the inner ring truss upper chord connecting end 17 and the inner ring truss lower chord connecting end 18 at both ends of the truss;

[0086] Each group of outer ring plane arc trusses and inner ring plane arc trusses is arranged in a ring direction around the central positioning point 29, and the ring direction plane arc truss combination and the landing multi-arch three-dimensional truss combination jointly constitute the core support framework of the main structure;

[0087] S3, the outer ring upper chord steel beam 19 arranged at a small interval and the outer ring lower chord steel beam 20 arranged at a large interval constitute the roof radial connecting steel beam between the outer ring plane truss combination; the inner ring upper chord steel beam 21 and the inner ring lower chord steel beam 22 arranged at a uniform interval constitute the roof radial connecting steel beam between the inner ring plane truss combination; and the two ends of the roof connecting steel beam are hingedly connected;

[0088] S4, the three trusses of the large-opening boundary arc-shaped arch beam 23 arranged at a large span and an inclined facade constitute a large-opening boundary space structure of the main structure, and the large-opening boundary arc-shaped arch beam 23 is located at the corresponding outer side of the landing multi-arch three-dimensional truss combination; the landing ends 24 of the boundary arch beams at both ends of the large-opening boundary arc-shaped arch beam 23 are simultaneously converged to the triangular landing fixed ends of the landing multi-arch three-dimensional truss combination to form a combined node support;

[0089] S5, the radial main inclined beam 25 and the ring direction secondary beam 26 constitute a boundary single-layer net shell with multiple sides in a ring direction, and are located at the upper chord layer between the ring direction multi-side large-opening boundary arc-shaped arch beam 23 and the landing multi-arch three-dimensional truss combination;

[0090] The central single-layer net shell is located in a middle region and is composed of radial net shell steel beams 27 and ring direction net shell steel beams 28, which are arranged at an oblique intersection to form a grid-shaped single-layer net shell structure; the boundary end of the central single-layer net shell is connected to the inner ring plane arc truss combination to form a closed roof structure system.

[0091] The overall load-bearing performance of the structure system is ensured by analyzing the load-bearing performance, controlling the stress of components, the overall rigidity and the torsional performance.

[0092] The various embodiments described in this specification are presented as examples of the application. Each embodiment is presented highlighting different aspects of the application, and the embodiments are not mutually exclusive.

Claims

1. A multi-arched three-dimensional truss floor support combination long-span roof structure, characterized in that, The main body structure comprises a multi-arch three-dimensional truss combination and a ring-shaped plane arc truss combination, and the auxiliary structure comprises a roof radial connecting steel beam, a boundary single-layer net shell and a central single-layer net shell. The multi-arch three-dimensional truss combination comprises arc-shaped inverted triangular three-dimensional arch trusses, and the landing ends of the arc-shaped inverted triangular three-dimensional arch trusses are connected to each other to form a ring-shaped structure; the outer side of the multi-arch three-dimensional truss combination is provided with a large-opening boundary arc-shaped arch beam (23), and the multi-arch three-dimensional truss combination and the large-opening boundary arc-shaped arch beam (23) meet at the landing end; a boundary single-layer net shell is arranged on the upper chord layer between the multi-arch three-dimensional truss combination and the large-opening boundary arc-shaped arch beam (23). The ring-shaped plane arc truss combination comprises outer ring plane arc trusses and inner ring plane arc trusses, and the outer ring plane arc trusses and the inner ring plane arc trusses are arranged staggeredly along the rotation angle of the ring; a plurality of outer ring plane arc trusses are arranged along the radial direction from the outside to the inside between two adjacent arc-shaped inverted triangular three-dimensional arch trusses; a plurality of inner ring plane arc trusses are arranged in the plurality of outer ring plane arc trusses on the innermost side; and a central single-layer net shell is arranged between the plurality of inner ring plane arc trusses on the innermost side. The ring-shaped plane arc truss is located on the inner side of the multi-arch three-dimensional truss combination and constitutes the core support frame of the main body structure; the roof radial connecting steel beam is arranged in the ring-shaped plane arc truss combination as a lateral support member and is arranged orthogonally to the plane arc truss; the boundary single-layer net shell comprises radial connecting main inclined beams (25) and ring connecting secondary beams (26); and the central single-layer net shell is a grid-shaped single-layer net shell structure arranged at an oblique angle. The inner ring plane arc truss is arranged in the space enclosed by the plurality of outer ring plane arc trusses on the innermost side; a plurality of inner ring plane arc trusses are arranged along the radial direction from the outside to the inside between two adjacent outer ring plane arc trusses; and each inner ring plane arc truss is rigidly connected to the two adjacent outer ring plane arc trusses on the innermost side through an inner ring truss upper chord connecting end (17) and an inner ring truss lower chord connecting end (18). The height of the outer ring plane arc truss and the inner ring plane arc truss is determined according to 1 / 25-1 / 20 of the span or the greater of the height of the corresponding connecting three-dimensional arch truss; when the height of the plane arc truss is greater than the height of the corresponding connecting three-dimensional arch truss, the two end slopes are contracted to the height of the connecting three-dimensional arch truss for connection.

2. The multi-arch solid truss landing support combination long span roof structure according to claim 1, wherein, The plurality of arc-shaped inverted triangular three-dimensional arch trusses in the multi-arch three-dimensional truss combination are arranged at an array of rotation angles around a central positioning point (29), and the end portions of adjacent arc-shaped inverted triangular three-dimensional arches are fixed at the three-dimensional truss landing end (6).

3. The multi-arch solid truss landing support combination long span roof structure according to claim 1, wherein, The inclined angle of the inclined surface of the arc-shaped inverted triangular three-dimensional arch truss is 50-80°, the inclined angle of the large-opening boundary arc-shaped arch beam (23) is 20-50°, the horizontal distance between adjacent three-dimensional truss landing ends (6) is 100-150 m, the vertical height of the highest part of the arc-shaped inverted triangular three-dimensional arch truss is 20-30 m, and the vertical height of the highest part of the large-opening boundary arc-shaped arch beam (23) is 15-25 m. The height of the single-pile arc-shaped inverted triangular solid arch truss is determined according to 1 / 25-1 / 20 of the span, and the cross section of the upper chord arch (1) and the lower chord arch (2) of the solid arch truss gradually decreases from the middle to both sides in a variable cross section form.

4. The multi-arch solid truss landing support combination long span roof structure according to claim 1, wherein, The two ends of each outer ring plane arc-shaped truss are rigidly connected to the adjacent two arc-shaped inverted triangular solid arch trusses through the outer ring truss upper chord connecting end (11) and the outer ring truss lower chord connecting end (12).

5. The multi-arch solid truss landing support combination long span roof structure according to claim 1, wherein, The upper chord layer of the ring plane arc-shaped truss combination is provided with one radial roof connecting steel beam for each axial network span, and the lower chord layer of the ring plane arc-shaped truss combination is provided with one radial roof connecting steel beam for each 2-3 axial network spans, and each axial network span is 8-12 m.

6. The multi-arch solid truss landing support combination long span roof structure according to claim 1, wherein, The radial roof connecting steel beams between the outer ring plane truss combinations include the outer ring upper chord steel beam (19) and the outer ring lower chord steel beam (20), the radial roof connecting steel beams between the inner ring plane truss combinations include the inner ring upper chord steel beam (21) and the inner ring lower chord steel beam (22), the setting interval of the outer ring lower chord steel beam (20) is greater than that of the outer ring upper chord steel beam (19), the setting interval of the inner ring upper chord steel beam (21) and the inner ring lower chord steel beam (22) is the same, and the end portions of the radial roof connecting steel beams are hingedly connected.

7. The multi-arch solid truss landing support combination long span roof structure according to claim 1, wherein, The radial connecting main inclined beams (25) of the boundary single-layer net shell are arranged in a V-shaped continuous manner and are cross-connected with the ring connecting secondary beams (26) through rigid nodes; one radial connecting main inclined beam (25) is provided in a through connection manner, and the ring connecting secondary beams (26) are provided in a segmented rigid connection manner. The central single-layer net shell includes radial net shell steel beams (27) and ring net shell steel beams (28).

8. The method of assembling a multi-arched space truss floor support combination long span roof structure of any one of claims 1 to 7, wherein, The method comprises the following steps: S1, a plurality of arc-shaped inverted triangular solid arch trusses are arranged in an angle array around a central positioning point (29) and are intersected and fixedly supported two by two through the solid truss floor ends (6) at both ends to form a floor multi-arch solid truss combination; S2, a plurality of outer ring plane arc-shaped trusses are rigidly connected between the adjacent two arc-shaped inverted triangular solid arch trusses, and inner ring plane arc-shaped trusses are rigidly connected and arranged in the innermost plurality of outer ring plane arc-shaped trusses to form a ring plane arc-shaped truss combination, which further forms a core support framework of the main structure together with the floor solid multi-arch truss combination of step S1; S3, roof radial connecting steel beams are arranged between the plurality of outer ring plane arc-shaped trusses parallel from the outside to the inside in the radial direction, and roof radial connecting steel beams are also arranged between the plurality of inner ring plane arc-shaped trusses parallel from the outside to the inside in the radial direction; S4, a plurality of large-opening boundary arc-shaped arch beams (23) are arranged corresponding to the outside of the floor multi-arch solid truss combination, the boundary arch beam floor ends (24) of the large-opening boundary arc-shaped arch beams (23) and the solid truss floor ends (6) of the floor multi-arch solid truss combination are intersected and combined to form a node support, thereby forming a large-opening boundary space structure of the main structure; S5, a boundary single-layer net shell is arranged in the upper chord layer between the large-opening boundary arc-shaped arch beams and the floor multi-arch solid truss combination, and a central single-layer net shell is arranged between the innermost plurality of inner ring plane arc-shaped trusses to form a closed roof structure system.

9. The method of assembling a multi-arched space truss floor support combination long span roof structure according to claim 8, wherein, The facade inclination angles of the inner ring plane arc-shaped trusses and the outer ring plane arc-shaped trusses arranged from the inside to the outside in the radial direction increase in turn.

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