A spatial steel structure with bidirectional roof suspension support

Abstract

This invention discloses a spatial steel structure with bidirectional cantilever support for the roof, belonging to the technical field of large-span spatial structures. It solves the problem in existing technologies of determining which spatial structure style can effectively improve the stress mode of the horizontal load-bearing components of the roof and enhance the overall structural economy and rationality for large-span spatial structures with bidirectional concave roof features. The spatial steel structure of this invention includes a cantilever truss arranged along the long direction of the roof and two continuous cantilever beams arranged along the short direction of the roof. The two ends of the cantilever truss are supported by support columns, the middle of the two continuous cantilever beams are connected to the cantilever truss, and the ends of the two continuous cantilever beams are supported by supports, forming a herringbone shape. This bidirectional cantilever support spatial steel structure can be used for roof support of large-span spatial structures with bidirectional concave roof features.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of large-span space structure, and particularly relates to a roof bidirectional overhanging support space steel structure. BACKGROUND

[0002] In combination with the curved ridge and curved roof shape of the characteristic local residence in Fujian, China, as a continuation and inheritance of the traditional architectural culture characteristics, the architect proposes the bidirectional concave curved roof shape feature in the architectural body shape creation.

[0003] In combination with the shape feature of the bidirectional concave roof of the building profession, the load bearing property advantage of the bidirectional overhanging structure can be effectively utilized, the stress mode of the roof horizontal bearing component is fully improved, and the overall roof structure economic rationalization level is significantly improved. SUMMARY

[0004] In view of the above analysis, the present application aims to provide a roof bidirectional overhanging support space steel structure, which solves the problem in the prior art that for the large-span space structure with the bidirectional concave curved roof shape feature, what kind of space structure style can effectively improve the stress mode of the roof horizontal bearing component and improve the overall structure economic rationalization level.

[0005] The purpose of the present application is mainly realized through the following technical solutions:

[0006] The present application provides a roof bidirectional overhanging support space steel structure, which comprises an overhanging truss arranged along the long direction of the roof and two-span continuous overhanging beams arranged along the short direction of the roof, both ends of the overhanging truss are supported by support columns, the middle part of the two-span continuous overhanging beams is connected with the overhanging truss, and the end part of the two-span continuous overhanging beams is supported by a support, so that the two-span continuous overhanging beams form a H-shaped structure.

[0007] Further, in the installation process of the roof bidirectional overhanging support space steel structure, vertical prestress is loaded on the overhanging truss, and the two-span continuous overhanging beams are installed in the state that the prestress loading is completed and has not been unloaded, and after installation, the prestress is unloaded step by step, and the two-span continuous overhanging beams are driven into the pre-tension load state by the rebound of the overhanging truss.

[0008] Further, the overhanging truss and the support column are connected by rigid connection.

[0009] Further, the support column at both ends of the overhanging truss is a rigid triangular support column.

[0010] Further, the above-mentioned roof bidirectional overhanging support space steel structure further comprises a swing column arranged between the support columns at both ends of the overhanging truss, and the top end of the swing column is connected with the overhanging truss.

[0011] Further, the supports at the ends of the two-span continuous cantilever beam are rigid A-shaped support columns.

[0012] Further, the two-span continuous cantilever beam is connected to the cantilever truss and the support column through a hinged joint (e.g., a pin).

[0013] Further, the two-span continuous cantilever beam is connected to the cantilever truss and the support column through a rigid joint.

[0014] Further, when the two-span continuous cantilever beam structure in the short direction has a span of more than 40 m, a rigid joint is used to control deformation; and when the two-span continuous cantilever beam structure in the short direction has a span of less than 40 m, a hinged joint is used to facilitate construction.

[0015] Further, the sag of the cantilever truss is 1 / 14-1 / 10.

[0016] Further, the sag of the two-span continuous cantilever beam is 1 / 14-1 / 10.

[0017] Further, the cantilever truss described above can be a spatial truss.

[0018] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0019] a) The two-way cantilever-supported spatial steel structure provided by the present application, which has a cantilever truss in the long direction and two-span continuous cantilever beams in the short direction, can effectively improve the vertical load bearing mode of the horizontal load-bearing members in two directions, and replace the relatively low-efficiency bending-resistant bearing mode with a high-efficiency tensile bearing or tensile-bending bearing mode, thereby saving the amount of structural material and effectively improving the economic rationalization level of the overall structure.

[0020] b) The two-way cantilever-supported spatial steel structure provided by the present application makes full use of the typical features of the architectural scheme shape, refines and utilizes the typical structural rationalization features thereof under the premise of ensuring its architectural aesthetic features, constitutes a fusion design scheme of architectural and structural rationalization, effectively realizes the rational control of the structural bearing mode, and truly realizes the integrated design control of the architectural and structural schemes, which belongs to an important technical innovation of public building design methods.

[0021] c) The roof bidirectional overhanging support space steel structure provided by the application can still bear unbalanced horizontal forces and corresponding torque loads caused by unequal spans, unbalanced wind loads, and unfavorable live load arrangements, etc. in the vertical plane. The overhanging truss is arranged in the vertical direction of the main span direction building scheme by using the sag height, simulates the tensile or pressure stress mode of the cable structure or arch structure, and is limited by the shape finding condition, and is actually a tensile or compressive bending stress mode. Under the action of the self-weight and wind pressure control condition, the overhanging truss uses the sag itself to simulate the pure tensile bearing mode of the flexible suspension cable structure. Considering the control condition of the actual building shape on the structure modeling, the structure sag control cannot completely achieve the ideal optimal state, therefore, the actual long direction overhanging truss bearing mode is a tensile bending bearing mode dominated by tension, which belongs to a high-efficiency vertical bearing mode, and can greatly save the amount of structural materials.

[0022] d) The roof bidirectional overhanging support space steel structure provided by the application, for two-span continuous overhanging beams, both spans adopt the overhanging beam structure, and the overhanging beam sag is used to simulate the tensile or pressure stress mode of the cable structure / arch structure, which is limited by the shape finding condition, and is actually a tensile or compressive bending stress mode. Under the action of the self-weight and wind pressure control condition, the two-span continuous overhanging beam uses the sag itself to simulate the pure tensile bearing mode of the flexible suspension cable structure. Considering the control condition of the actual building shape on the structure modeling, the structure sag control cannot completely achieve the ideal optimal state, therefore, the actual short direction two-span continuous overhanging beam bearing mode is a tensile bending bearing mode dominated by tension, which belongs to a high-efficiency vertical bearing mode, and can greatly save the amount of structural materials.

[0023] e) The roof bidirectional overhanging support space steel structure provided by the application, the overhanging truss relies on the rigid connection joint with the triangular support column at both ends, and can bear the balanced horizontal forces and corresponding torques caused by the two-span continuous overhanging beams in the short direction.

[0024] f) The roof bidirectional overhanging support space steel structure provided by the application considers that the overhanging truss will deform vertically under the action of the vertical load of the roof, and therefore, for the short direction two-span continuous overhanging beam, the actual overhanging truss is a middle elastic support, which may cause the load bearing mode degradation problem of the short direction two-span overhanging beam. In order to solve the above problem, the rigid support state of the long direction overhanging truss is simulated, the overhanging truss is vertically prestressed during the installation process of the above-mentioned roof bidirectional overhanging support space steel structure, so that the overhanging truss is directionally loaded and controlled according to the deformation state of the overhanging truss corresponding to the standard working condition (note: dead load + live load working condition), and the short direction two-span continuous overhanging beam is installed in the prestressed state, and after installation, it is unloaded step by step, and the two-span continuous overhanging beam is driven into the pre-tension load bearing state by the rebound of the overhanging truss, which is an important technical improvement and necessary guarantee measure for realizing the bidirectional overhanging support space steel structure.

[0025] g) The roof bidirectional overhanging support space steel structure provided by the application can reduce the main span of the long direction overhanging truss through the setting of the rocking column, and significantly reduce the rigid prestressed load burden, thereby reducing the load bearing burden of the overall structure, realizing the stable support of the overhanging truss, and saving the amount of structural material.

[0026] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be realized and attained by the structure particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application.

[0028] Figure 1a The short direction schematic view of the building design scheme with the bidirectional concave curved roof shape characteristics;

[0029] Figure 1b The long direction schematic view of the building design scheme with the bidirectional concave curved roof shape characteristics;

[0030] Figure 2 The structure schematic view of the long direction overhanging truss in the roof bidirectional overhanging support space steel structure provided by the first embodiment of the application;

[0031] Figure 3 The load bearing mode schematic view of the short direction two-span continuous overhanging beam in the roof bidirectional overhanging support space steel structure provided by the first embodiment of the application in the self-weight and wind pressure control working condition;

[0032] Figure 4The load bearing mode schematic view of the short direction two-span continuous suspended beam of the roof bidirectional suspended support space steel structure provided by the embodiment one of the present application under the wind suction control working condition;

[0033] Figure 5 The structure schematic view of the roof bidirectional suspended support space steel structure provided by the embodiment one of the present application;

[0034] Figure 6 The front view of the roof bidirectional suspended support space steel structure provided by the embodiment one of the present application;

[0035] Figure 7 The side view of the roof bidirectional suspended support space steel structure provided by the embodiment one of the present application;

[0036] Figure 8 The top view of the roof bidirectional suspended support space steel structure provided by the embodiment one of the present application;

[0037] Figure 9 The prestress loading schematic view of the roof bidirectional suspended support space steel structure provided by the embodiment one of the present application;

[0038] Figure 10 The installation schematic view of the short direction two-span continuous suspended beam of the roof bidirectional suspended support space steel structure provided by the embodiment one of the present application under the prestress loading state.

[0039] Reference signs:

[0040] 1-suspended truss; 2-two-span continuous suspended beam; 3-support column; 4-supporting base; 5-swinging column. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of the present application and are used to explain the principles of the embodiments of the present application.

[0042] Embodiment one

[0043] The embodiment provides a roof bidirectional suspended support space steel structure, referring to FIG. 1 to Figure 10 , including a suspended truss 1 arranged along the long direction of the roof and a two-span continuous suspended beam 2 arranged along the short direction of the roof, both ends of the suspended truss 1 are supported by a support column 3, the middle part (i.e. one end of the two-span continuous suspended beam 2 close to each other) of the two-span continuous suspended beam 2 is connected with the suspended truss 1, and the end part (i.e. the other end of the two-span continuous suspended beam 2) of the two-span continuous suspended beam 2 is supported by a supporting base 4, so that the two-span continuous suspended beam 2 forms a herringbone shape, and the whole forms a structure with high middle and low sides.

[0044] Compared with the prior art, the roof bidirectional overhanging support space steel structure provided by the embodiment can effectively improve the vertical load bearing mode of the horizontal load bearing member in the long direction and the short direction, replace the relatively low efficiency bending resistance bearing mode in the prior art with the high efficiency tensile bearing or tensile bending bearing mode, save the amount of structural material, and effectively improve the economic rationalization level of the overall structure.

[0045] Meanwhile, the typical features of the building scheme shape (see Figures 1a to 1b ) are fully utilized, the typical features of structural rationalization possessed by the building scheme shape are refined and utilized under the premise of ensuring the architectural aesthetic features, the building and structural rationalization are integrated to form a design scheme, the rational control requirement of the structural bearing mode is effectively realized, the integrated design control of the building and structural scheme is realized in a true sense, and the important technical innovation of the public building design method is realized.

[0046] Specifically, for the overhanging truss 1, the overhanging truss 1 can still bear the unbalanced horizontal force and the corresponding torque load caused by the unequal span, the unbalanced wind load, the unfavorable live load arrangement and the like in the vertical plane. The overhanging truss 1 is arranged in the long direction by using the droop height of the main span direction building scheme, simulates the tensile or pressure bearing mode of the cable structure or arch structure, and is limited to the shape finding condition, and is actually in the tensile bending or compressive bending bearing mode. Under the action of the self-weight and wind pressure control working condition, the overhanging truss 1 simulates the pure tensile bearing mode of the flexible suspension cable structure by using the droop of the overhanging truss 1. Considering the control condition of the actual building shape on the structure modeling, the structure droop control cannot completely realize the ideal optimal state, therefore, the actual long direction overhanging truss 1 is in the tensile bending bearing mode, which belongs to the high efficiency vertical bearing mode, and the amount of structural material can be greatly saved. Under the action of the wind suction force control working condition, the overhanging truss 1 forms a rigid pressure arch structure by using the droop of the overhanging truss 1. Considering the control condition of the actual building shape on the structure modeling, the structure droop control cannot completely realize the ideal optimal state, therefore, the actual long direction overhanging truss 1 is in the compressive bending bearing mode, which belongs to the high efficiency vertical bearing mode, and the amount of structural material can be greatly saved.

[0047] For the two-span continuous suspended beam 2, both spans are suspended beam structures, which simulate the tensile or compressive stress mode of cable structure / arch structure by using the sag of the suspended beam. Limited to the shape-finding conditions, the actual stress mode is the bending stress mode under tension or compression. Under the action of self-weight and wind pressure control working conditions, the two-span continuous suspended beam 2 utilizes its own sag to simulate the pure tensile bearing mode of flexible suspension cable structure. Considering the control conditions of the actual building shape on the structure modeling, the structure sag control cannot completely achieve the ideal optimal state, therefore, the actual short direction two-span continuous suspended beam 2 is mainly in the tensile bending bearing mode, which belongs to the high efficiency vertical bearing mode, and can greatly save the amount of structural materials. Under the action of wind suction force control working conditions, the two-span continuous suspended beam 2 utilizes its own sag to form a rigid compressive arch structure. Considering the control conditions of the actual building shape on the structure modeling, the structure sag control cannot completely achieve the ideal optimal state, therefore, the actual short direction two-span continuous suspended beam 2 is mainly in the compressive bending bearing mode, which belongs to the high efficiency vertical bearing mode, and can greatly save the amount of structural materials.

[0048] For the connection between the suspended truss 1 and the two-span continuous suspended beam 2, considering that the suspended truss 1 will deform vertically under the action of the roof vertical load, the actual suspended truss 1 is an elastic support. The suspended truss 1 relies on the rigid connection node of the supporting column, and can bear the unbalanced horizontal force and the corresponding torque caused by the two-span continuous suspended beam 2 in the short direction.

[0049] In practical application, affected by its own vertical deformation, the suspended truss 1 is actually an elastic support, and the long direction suspended truss 1 is used as an elastic support to support the two-span continuous suspended beam 2, which will cause the bearing mode degradation problem. Specifically, according to the spatial geometric relationship, when the long direction suspended truss 1 appears vertical deformation and actually forms an elastic support, the short direction two-span continuous suspended beam 2 has a length direction compression trend, and further generates compressive stress; when the vertical deflection of the long direction suspended truss 1 exceeds a certain amplitude, the compressive stress component caused by the axial compression of the short direction two-span continuous suspended beam 2 will exceed the tensile stress component caused by the suspended bearing stress mode, the short direction two-span continuous suspended beam 2 is converted into the actual compression bending stress mode, the overall bearing efficiency is significantly reduced, and it is obviously inconsistent with the design assumption of the two-span continuous suspended beam 2. Among them, the end of the two-span continuous suspended beam 2 is still in the tensile bending bearing mode due to the small end deflection of the suspended truss 1, and the middle of the two-span continuous suspended beam 2 has already been in the compression bending bearing mode due to the large deflection of the two-span suspended truss 1.

[0050] Considering that the vertical deflection deformation of the suspended truss 1 will occur under the action of the roof vertical load, the actual suspended truss 1 is a middle elastic support for the short direction two-span continuous suspended beam 2, which may cause the load bearing mode degradation problem of the short direction two-span continuous suspended beam 2. In order to solve the above problem, the rigid support state of the long direction suspended truss 1 is simulated, the vertical prestress loading is carried out on the suspended truss 1 during the installation process of the above-mentioned two-way suspended support space steel structure of the roof, and the short direction two-span continuous suspended beam is installed in the state that the prestress loading is completed and has not been unloaded. In this way, the deformation state of the suspended truss 1 is controlled by directional loading according to the standard working condition (note: dead load + live load working condition), and the short direction two-span continuous suspended beam 2 is installed in the state that the prestress loading is kept. After installation, it is unloaded step by step, and the two-span continuous suspended beam 2 is driven into the pre-tension load bearing state by the rebound of the suspended truss 1. This is an important technical improvement and necessary guarantee measure to realize the two-way suspended support space steel structure.

[0051] In order to ensure the effective transmission of the torque of the suspended truss 1, the suspended truss 1 and the support column 3 are connected by a rigid connection.

[0052] In addition, in order to effectively bear the horizontal force and torque caused by the long direction suspended truss 1, the support column 3 at both ends of the suspended truss 1 is a rigid triangular support column 3.

[0053] Considering that when the long direction structure span is too large, only the support column 3 cannot realize the stable support of the suspended truss 1, therefore, the above-mentioned two-way suspended support space steel structure of the roof further comprises a swing column 5 arranged between the support columns 3 at both ends of the suspended truss 1, and the top end of the swing column 5 is connected with the suspended truss 1. In this way, by arranging the swing column 5, the main span of the long direction suspended truss 1 can be reduced, and the rigid prestress loading burden can be significantly reduced, thereby reducing the load bearing burden of the overall structure, realizing the stable support of the suspended truss 1, and saving the amount of structural materials.

[0054] In order to bear the horizontal force caused by the two-span continuous suspended beam 2 structure, the support 4 at the end of the above-mentioned two-span continuous suspended beam 2 is a rigid A-shaped support column.

[0055] For the connection of the two-span continuous suspended beam 2, the following two ways can be used:

[0056] One way is that the two-span continuous suspended beam 2 and the suspended truss 1 and the support 4 are connected through a hinged joint (for example, a pin shaft) respectively. By using this way, the load bearing mode of the two-span continuous suspended beam 2 is clear, and the pin shaft connection of the hinged joint is easy to process and install.

[0057] In another mode, the two-span continuous cantilever beam 2 is connected with the cantilever truss 1 and the support 4 through a rigid joint respectively, and in this mode, the structural deflection of the two-span continuous cantilever beam 2 in the short direction can be greatly reduced, and the structural deformation can be effectively controlled.

[0058] In actual application, when the two-span continuous cantilever beam 2 in the short direction has a large structural span (more than 40 m), the rigid joint is used to control the deformation; when the two-span continuous cantilever beam 2 in the short direction has a small structural span (less than 40 m), the hinged joint is used to facilitate construction.

[0059] It is worth noting that, due to the appearance requirements of the building scheme, the sag of the cantilever truss 1 and the two-span continuous cantilever beam 2 in the short direction cannot be set according to the theoretically optimal pure tension / pure compression bearing mode, and considering the appearance requirements of the building scheme, the aesthetic control requirements of the building scheme and the indoor net height requirements of the building, the sag of the cantilever truss 1 can be appropriately increased under the allowable conditions of the building scheme, and the sag of the cantilever truss 1 is exemplarily 1 / 14-1 / 10, such as 1 / 14, 1 / 13, 1 / 12 or 1 / 11.

[0060] Similarly, considering the basic requirements of the roof drainage in the short direction, the sag of the two-span continuous cantilever beam 2 can be appropriately increased under the allowable conditions of the building scheme, and the sag of the two-span continuous cantilever beam 2 is exemplarily 1 / 14-1 / 10, such as 1 / 14, 1 / 13, 1 / 12 or 1 / 11.

[0061] It should be noted that, in building design, the roof spans on both sides are usually different, and correspondingly, the spans of the two-span continuous cantilever beams 2 are different, and the cantilever truss 1 has horizontal bearing and torsional bearing requirements under the action of the asymmetric vertical loads, the most unfavorable live load arrangement and the asymmetric wind load of the roof of the two-span continuous cantilever beams 2 with unequal spans on both sides, and therefore, the cantilever truss 1 can be a spatial truss, so that the unbalanced horizontal bearing requirement can be converted into the overall torsion of the spatial truss through the arrangement of the spatial truss.

[0062] The above description is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, which should be covered within the protection scope of the present application.

Claims

1. A spatial steel structure of a roof two-way suspended support, characterized by, The roof is provided with a cantilever truss arranged along a long direction of the roof and two-span continuous cantilever beams arranged along a short direction of the roof; Two ends of the cantilever truss are supported by support columns, and a middle part of the two-span continuous cantilever beams is connected with the cantilever truss, and end parts of the two-span continuous cantilever beams are supported by supports; In the installation process of the spatial steel structure of the roof two-way cantilever support, vertical prestress is loaded on the cantilever truss, and the two-span continuous cantilever beams are installed in a state that the prestress loading is completed and not unloaded, and the prestress is unloaded step by step after the installation is completed, so that the two-span continuous cantilever beams are driven into a pre-tension load state by rebound of the cantilever truss.

2. The roofing bi-directional draping supported space steel structure according to claim 1, wherein, The cantilever truss and the support columns are connected in a rigid manner.

3. The roofing bi-directional draping supported space steel structure according to claim 1, wherein, The support columns at the two ends of the cantilever truss are rigid triangular support columns.

4. The roofing bi-directional draping supported space steel structure according to claim 1, wherein, The spatial steel structure of the roof two-way cantilever support further comprises a swing column arranged between the support columns at the two ends of the cantilever truss, and a top end of the swing column is connected with the cantilever truss.

5. The roofing bi-directional draping supported space steel structure according to claim 1, wherein, The supports at the end parts of the two-span continuous cantilever beams are rigid A-shaped support columns.

6. The roofing bi-directional draping supported space steel structure according to any one of claims 1 to 5, characterized in that, The two-span continuous cantilever beams are connected with the cantilever truss and the supports through hinged joints respectively.

7. The roofing bi-directional draping supported space steel structure according to any one of claims 1 to 5, characterized in that, The two-span continuous cantilever beams are connected with the cantilever truss and the supports through rigid joints respectively.

8. The roofing bi-directional draping supported space steel structure according to any one of claims 1 to 5, characterized in that, The sag of the cantilever truss is 1 / 14-1 / 10. The sag of the two-span continuous cantilever beams is 1 / 14-1 / 10.

9. The roofing bi-directional draping supported space steel structure according to any one of claims 1 to 5, characterized in that, The cantilever truss is a spatial truss.

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