Super-large-span bionic overhanging plane truss structure

Abstract

The utility model belongs to the technical field of building structures, and particularly relates to a super-large-span bionic cantilever plane truss structure which comprises a main truss, a ring truss and a continuous truss. The main truss comprises a plurality of floor main truss units which are scattered to the periphery, the bottoms of the floor main truss units are fixed on a foundation, and the upper parts of the floor main truss units are scattered to the periphery in an arc shape; the ring trusses are arranged among the floor main truss units and share part of nodes with the main trusses; the middle of the continuous truss is supported on the main truss, the tail of the continuous truss is connected with a foundation, and a large cantilever part is formed at the front end of the continuous truss. The floor main truss is arranged as a main stress component, and forms a space stress system together with the annular cylinder truss, the continuous truss, the secondary trusses, the supporting rods and the edge sealing rod pieces, so that integral stress is formed among the plane trusses, the force transmission of the structure main body is definite, the effective transmission of the force is achieved, and the structure safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to an ultra-large span bionic cantilevered plane truss structure. Background Art

[0002] Nature is the best teacher for architects, and bionic architecture fully reflects the natural beauty of architecture. With the advancement of science and technology, people's aesthetic requirements for architecture are constantly improving, and there are more and more types of bionic architecture, and the requirements for structure are getting higher and higher. Not only are bionic structures required, but also the structural layout is required to be simple, transparent and natural.

[0003] In the super-large span cantilever buildings currently built at home and abroad (the 2015 edition of the "Technical Points for Special Review of Seismic Fortification of Super-limit High-rise Building Projects" stipulates that the span of the spatial grid structure or cable structure is greater than 120 meters or the cantilever length is greater than 40 meters, the span of the reinforced concrete thin shell is greater than 60 meters, the span of the integral tensioned membrane structure is greater than 60 meters, the length of the roof structure unit is greater than 300 meters, the roof structure form is a multiple combination or hybrid combination of commonly used spatial structure forms, and large public buildings with particularly complex roof shapes are super-limited large-span spatial structures), the structural forms used mainly include grids and three-dimensional trusses, and there is no precedent for the use of plane trusses. Plane trusses, as the name suggests, refer to trusses in which the axes of all rods are located in the same plane.

[0004] Grids and three-dimensional trusses have strong integrity and good force-bearing performance, but the large number of structural rods usually makes the building look complicated and not simple, so they are more suitable for buildings with low requirements for architectural effects and non-exposed structures, or sports buildings. Plane truss structures are light, beautiful, have clear force transmission, and high force efficiency, but their out-of-plane stiffness is poor, and certain measures need to be taken to ensure their out-of-plane stability. Therefore, they are only used more in short cantilever structures.

[0005] The prior art has the following problems:

[0006] 1. The cantilever length of the current cantilever plane truss structure is relatively small;

[0007] 2. The current cantilever plane truss structure has problems with out-of-plane stability when applied to large cantilevers (spans);

[0008] 3. The current cantilever plane truss structure is not novel enough;

[0009] 4. Today's large cantilever structures are usually in the form of grid and three-dimensional truss structures, with many rods and not simple, making the overall structure appear bulky and not light. Utility Model Content

[0010] In view of the shortcomings of the prior art, the utility model provides an ultra-large span bionic cantilever plane truss structure, which solves the out-of-plane stability problem of the current plane truss when used in large cantilever projects, and realizes the application of the plane truss structure in the ultra-large span cantilever structure.

[0011] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0012] An ultra-large span bionic cantilever plane truss structure, comprising a main truss, a ring truss and a continuous truss;

[0013] The main truss comprises a plurality of ground-mounted main truss units spreading out in all directions, wherein the bottom of the ground-mounted main truss unit is fixed on the foundation, and the upper part spreads out in all directions in an arc shape;

[0014] The ring truss is arranged between each grounded main truss unit, formed into a cylindrical shape, and shares some nodes with the main truss. In the vertical section of the main truss, the ring truss is arranged as a plane truss, and in the arc section of the main truss, the ring truss is arranged as a three-dimensional truss;

[0015] The middle part of the continuous truss is supported on the main truss, the tail part is connected to the foundation, and the front end is formed as a large cantilever part.

[0016] Furthermore, the ground-mounted main truss units are all arc-shaped cantilevered plane trusses, spreading out in all directions.

[0017] Furthermore, transverse secondary trusses and struts are arranged at the cantilevered end and tail of the continuous truss.

[0018] Furthermore, it also includes edge sealing rods, which are single rods or plane trusses and surround the entire structure.

[0019] Furthermore, the main truss and the ring truss are connected in a manner that the chord of the main truss is penetrated and the chord of the ring truss is cut off.

[0020] Furthermore, the bottom of the main truss adopts an embedded support, which is a fixed support, and the tail of the continuous truss is set as a hinged support, a spring support or a fixed support according to calculation requirements.

[0021] Furthermore, the rods of the main truss are made of steel with a strength grade of Q355C or above.

[0022] Furthermore, the web member material of the secondary truss is steel or reconstructed bamboo, the strength grade of the steel or reconstructed bamboo is respectively Q355C or Ep14 and above, and the materials of the other rods are steel of Q355C and above.

[0023] Furthermore, the shape of the combination of the main truss and the ring truss is simulated by the legs of a dinosaur, and the shape of the continuous truss is simulated by the neck of a dinosaur.

[0024] Compared with the prior art, the utility model provides an ultra-large span bionic cantilever plane truss structure, which has the following beneficial effects:

[0025] 1. With the main truss as the main load-bearing member, the vertical load and horizontal load of the large cantilever part are gradually transmitted to the main truss through the continuous truss, and finally to the foundation. The main truss, secondary truss, continuous truss and ring truss are coordinated to bear the force, so that an overall force structure system is formed between the plane trusses, which achieves effective force transmission, ensures structural safety, and presents a novel structural form to achieve an ideal architectural effect.

[0026] 2. The ultra-large span cantilever is achieved through the plane continuous truss. Compared with the existing grid and three-dimensional trusses, the present invention greatly reduces the number of rods, achieves a simple, light and natural architectural effect, and achieves the beauty of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a structural schematic diagram of an ultra-large span bionic cantilever plane truss structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the plane structure of a super-large span bionic cantilever plane truss structure of the utility model;

[0029] Figure 3 This is a schematic diagram of the main truss structure of an embodiment of an ultra-large span bionic cantilever plane truss structure of the utility model;

[0030] Figure 4 The utility model is a schematic diagram of a secondary truss structure of an embodiment of a super-large span bionic cantilever plane truss structure.

[0031] Figure 5 A schematic diagram of a ring truss of a super-large span bionic cantilever plane truss structure of the utility model;

[0032] Figure 6 A schematic diagram of a continuous truss of a super-large span bionic cantilever plane truss structure of the utility model;

[0033] Figure 7 A schematic diagram of a supporting and edge-sealing single rod of an ultra-large-span bionic cantilever plane truss structure of the utility model.

[0034] Markings in the figure: 1. Main truss; 2. Secondary truss; 3. Ring truss; 4. Continuous truss; 5. Edge banding member. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-7 In this implementation scheme:

[0037] A super-large span bionic cantilever plane truss structure, comprising a main truss 1, a ring truss 3 and a continuous truss 4; the main truss 1 comprises a plurality of ground-mounted main truss units spreading out in all directions, preferably in a petal-like shape, wherein the bottom of the ground-mounted main truss unit is fixed on a foundation, and the upper part spreads out in an arc shape in all directions; the ring truss 3 is arranged between each ground-mounted main truss unit, formed into a cylindrical shape, and shares some nodes with the main truss 1, in the vertical section of the main truss, the ring truss 3 is arranged as a plane truss, and in the arc section of the main truss 1, the ring truss 3 is arranged as a three-dimensional truss; the middle part of the continuous truss 4 is supported on the main truss 1, the tail part is connected to the foundation, and the front end is formed into a large cantilever part.

[0038] In an embodiment of the present application, the ground-mounted main truss units have 10 trusses, all of which are arc-shaped cantilevered plane trusses, spreading out in all directions in a blooming shape.

[0039] In the embodiment of the present application, the cantilevered end and the tail of the continuous truss 4 are provided with transverse secondary trusses 2 and struts.

[0040] In the embodiment of the present application, an edge sealing rod 5 is also included. The edge sealing rod 5 is a single rod or a plane truss, surrounding the entire structure.

[0041] In the embodiment of the present application, the main truss 1 and the ring truss 3 are connected in a manner that the chord of the main truss is penetrated and the chord of the ring truss is cut off.

[0042] In the embodiment of the present application, the bottom of the main truss 1 adopts an embedded support, which is a fixed support, and the tail of the continuous truss is set as a hinged support, a spring support or a fixed support according to calculation requirements.

[0043] In this embodiment, the main truss 1 is a cantilever plane truss, which can be arc-shaped and spread out in all directions in a blooming shape. The lower chord of the main truss 1, the upper chord of the main truss, and the web of the main truss can be adjusted in number according to the building volume. The maximum cantilever span of the overall structure is 56m. Ring trusses are arranged between the lower chord of the main truss, the upper chord of the main truss, and the web of the main truss, and the main truss chord is connected and the ring truss chord is cut off. The main truss structure can be stabilized by adopting the method of connecting the main truss chord and cutting the ring truss chord. The ring truss can be a plane truss or a three-dimensional truss according to the architectural plan and the overall structure, and the number of the ring truss can be adjusted. The cantilever section can be adjusted according to the architectural plan. The width and the number of cantilever trusses in the long cantilever section are adjustable, out-of-plane secondary trusses are arranged between the cantilever trusses, and the number of out-of-plane secondary trusses or supports can be adjusted according to the building structure and plan. The bottom of the main truss 1 adopts embedded supports, which are fixed supports. By using embedded supports, the stability of the main truss can be increased. The structural material of the lower chord of the main truss 1, the upper chord of the main truss 1, the web of the main truss 1, the steel lower chord of the secondary truss 2, and the steel upper chord of the secondary truss 2 is steel, and the preferred strength grade is Q355C and above. The strength can be improved by using steel structure. The material of the web of the secondary truss 2 is steel or reconstructed bamboo, and the preferred strength grade is Q355C or Ep14 and above.

[0044] The working principle and use process of the utility model are as follows: the structure is based on the bionic prototype of the dinosaur "Mamenchisaurus" with the longest neck in the world and the largest neck-to-body ratio; according to the architectural plan, the head part of the Mamenchisaurus is an ultra-large span cantilever structure. This application uses the main truss 1 as the main load-bearing member, and gradually transmits the vertical load and horizontal load of the large cantilever part to the main truss through the continuous truss 4, and finally to the foundation. The cantilever plane truss structure is adopted to achieve the architectural effect of "simple, light, natural, and showing the beauty of the skeleton of Mamenchisaurus". The ground-mounted main trusses are evenly arranged to form a cylinder, which spreads out in all directions in a flower-like shape; ring trusses are set in the vertical sections of the main trusses to enhance the integrity, improve the efficiency of the coordinated work of the main trusses, and ensure the effective transmission of force; in order to more effectively restrain the deformation of the main trusses, the ring trusses in the arc section of the main trusses are strengthened into three-dimensional trusses; two continuous trusses run through the head and tail of the structure, and hinged supports are set at the tail, with the main truss in the middle as the fulcrum to achieve a large cantilever structure; at the same time, secondary trusses and struts are set at the cantilever end and the tail part of the super-large span, and the secondary trusses are used to improve the overall stiffness of the structure, enhance the integrity, and solve the stability problem of the outside of the plane truss; the edge-sealing rods use a single round tube to make the building appear lighter as a whole.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A super-large span bionic cantilever plane truss structure, characterized by: It includes main trusses, ring trusses and continuous trusses; The main truss comprises a plurality of ground-mounted main truss units spreading out in all directions, wherein the bottom of the ground-mounted main truss unit is fixed on the foundation, and the upper part spreads out in all directions in an arc shape; The ring truss is arranged between each grounded main truss unit, formed into a cylindrical shape, and shares some nodes with the main truss. In the vertical section of the main truss, the ring truss is arranged as a plane truss, and in the arc section of the main truss, the ring truss is arranged as a three-dimensional truss; The middle part of the continuous truss is supported on the main truss, the tail part is connected to the foundation, and the front end is formed as a large cantilever part.

2. The ultra-large span bionic cantilever plane truss structure according to claim 1, characterized in that: The ground-mounted main truss units are all arc-shaped cantilevered plane trusses, spreading out in all directions.

3. The ultra-large span bionic cantilever plane truss structure according to claim 1, characterized in that: The cantilevered end and tail of the continuous truss are provided with transverse secondary trusses and struts.

4. The ultra-large span bionic cantilever plane truss structure according to claim 1, characterized in that: It also includes edge sealing rods, which are single rods or plane trusses and surround the entire structure.

5. The ultra-large span bionic cantilever plane truss structure according to claim 1 is characterized by: The main truss and the ring truss are connected in a manner that the chord of the main truss is penetrated and the chord of the ring truss is cut off.

6. The ultra-large span bionic cantilever plane truss structure according to claim 1, characterized in that: The bottom of the main truss adopts an embedded support, which is a fixed support, and the tail of the continuous truss is set as a hinged support, a spring support or a fixed support according to calculation requirements.

7. The ultra-large span bionic cantilever plane truss structure according to claim 1 is characterized by: The rods of the main truss are made of steel with a strength grade of Q355C or above.

8. The ultra-large span bionic cantilever plane truss structure according to claim 3 is characterized by: The web member material of the secondary truss is steel or reconstructed bamboo, the strength grade of the steel or reconstructed bamboo is respectively Q355C or Ep14 or above, and the materials of the other rods are steel of Q355C or above.

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