Wave-shaped double cantilever beam structure and construction method

Abstract

The application discloses a wave-shaped twice-suspended beam structure and a construction method, and the twice-suspended beam structure comprises a main force-bearing suspended beam, an internal continuous suspended beam, an internal suspended beam tie rod and a support column; the main force-bearing suspended beam and the internal continuous suspended beam are both in the shape of a catenary; the main force-bearing suspended beams are fixedly connected through rigid nodes, the support column is connected with the rigid nodes of the main force-bearing suspended beams, the internal continuous suspended beam is fixedly connected with the main force-bearing suspended beam, and the internal suspended beam tie rod is hingedly connected with the internal continuous suspended beam; and a plurality of twice-suspended beam structures form a wave-shaped twice-suspended beam structure system. The twice-suspended beam structure is mathematically decomposed by using a catenary, the structural components have better buckling stability under the action of vertical loads and wind suction loads, the steel consumption of the structure system is low, the mechanical properties and economic performance are excellent, and the construction is convenient.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, and in particular to a wave-shaped double-suspension beam structure and its construction method. Background Technology

[0002] Current single-layer reticulated shell structures are spatial structural systems formed by arranging members regularly along a curved surface. Their stress characteristics are similar to thin-shell structures, primarily characterized by "membrane" forces, meaning most loads are borne by the axial forces of the reticulated shell members. However, in practical engineering applications, due to the varying shapes of building surfaces, single-layer reticulated shell members inevitably experience bending moments, leading to increased member cross-sections. Furthermore, traditional single-layer reticulated shell structures, such as arch shells and spherical shells, exhibit predominantly compressive stress under vertical loads, resulting in overall structural instability and localized member buckling. Suspension beams are a common structural form, frequently used in bridges and cable-stayed bridges. A suspension beam can be described as a member suspended between two supports, its own weight causing it to hang. Based on the stress characteristics of single-layer reticulated shells dominated by membrane forces and the structural characteristics of suspension beams dominated by tensile forces, this invention proposes a wave-shaped double-suspension beam structure where members are primarily under tension under vertical loads. Summary of the Invention

[0003] The purpose of this invention is to propose a wave-shaped double-suspension beam structure and its construction method. The double-suspension beam structure is mathematically deconstructed using a catenary. The structural components have superior buckling stability under both vertical loads and wind suction loads. No formwork is required during construction, and multiple wave-shaped suspension beams can be constructed simultaneously, which can significantly shorten the construction period. The structure has excellent mechanical and economic properties and is easy to construct.

[0004] This invention is achieved through the following technical solution:

[0005] A wave-shaped double-suspension beam structure includes a main load-bearing suspension beam, an inner continuous suspension beam, an inner suspension beam tie rod, and a support column. Both the main load-bearing suspension beam and the inner continuous suspension beam are catenary-shaped. The main load-bearing suspension beams are fixedly connected to each other via rigid nodes. The support column is connected to the rigid nodes of the main load-bearing suspension beam. The inner continuous suspension beam is fixedly connected to the main load-bearing suspension beam, and the inner suspension beam tie rod is connected to the inner continuous suspension beam. Several of these double-suspension beam structures constitute the wave-shaped double-suspension beam structure.

[0006] As a further improvement to the technical solution of this invention, both the main load-bearing suspension beam and the internal continuous suspension beam are continuously curved catenary shapes. The main control parameters of the hyperbolic cosine function describing the catenary include the elevation difference Δh from the start point to the end point of the catenary, the horizontal projection distance L from the start point to the end point, and the length l of the catenary. The main load-bearing suspension beam is set to be composed of a catenary with a planar projection length L, an elevation difference Δh, and a true curve length l. An xoy rectangular coordinate system is established based on the lowest point of the catenary. Then, the equation of the catenary satisfies y(x)=1 / k[cosh(kx)-1], where k satisfies cosh(kL)-1=k 2 / 2(l 2 -Δh 2 ).

[0007] As a further improvement to the technical solution of the present invention, a unique catenary is set from the initial structural beam line with a height difference Δh between two points, a planar projection distance L, and a length l.

[0008] As a further improvement to the technical solution of the present invention, the internal suspension beam tie rod is a tension / compression rod or a steel tie rod.

[0009] As a further improvement to the technical solution of the present invention, the two ends of the main load-bearing suspension beam are rigidly connected, and the main load-bearing suspension beam is fixedly connected by rigid nodes.

[0010] As a further improvement to the technical solution of the present invention, the rigid node of the support column and the main load-bearing suspension beam is fixedly connected by a universal hinge support.

[0011] As a further improvement to the technical solution of the present invention, the internal continuous suspension beam is fixedly connected to the main load-bearing suspension beam by hinge or welding.

[0012] As a further improvement to the technical solution of the present invention, the internal suspension beam tie rod and the internal continuous suspension beam are connected by bolts or pins.

[0013] As a further improvement to the technical solution of the present invention, the main load-bearing suspension beam is a continuously curved rod forming a catenary shape, and the main load-bearing suspension beams between adjacent waves share a common catenary. Multiple secondary suspension beam structures are combined to form a wave-shaped secondary suspension beam structure.

[0014] As a further improvement to the technical solution of this invention, a construction method for a wave-shaped double-suspension beam structure includes the following steps:

[0015] Step S1: After the civil structure is completed, install column top support nodes on the top of the concrete columns supporting the roof, including universal fixed supports and rigid connection nodes of the main load-bearing beams.

[0016] Step S2: Assemble the main load-bearing suspension beam on the ground, hoist the whole beam to the original position on the roof, and install the main load-bearing suspension beam; Step S3: Assemble the internal continuous suspension beam on the ground, hoist the whole beam to the original position on the roof, and install the internal continuous suspension beam.

[0017] Step S4: Install tie rods for the internal continuous suspension beams of two adjacent frames;

[0018] Step S5: Repeat steps S3 to S4 to complete the assembly of a single wavy roof.

[0019] Step S6: Repeat steps S1 to S5. Multiple wavy suspended beam structures can be constructed simultaneously until all wavy suspended beam structures on the roof are installed.

[0020] The beneficial effects of this invention are:

[0021] This invention employs a catenary to mathematically deconstruct a double-suspension beam structure. The structure exhibits superior buckling stability under both vertical and wind-induced loads, with low steel consumption and excellent mechanical and economic performance. Compared to traditional single-layer reticulated shells, the suspended beam structure of this invention is generally easier to design and construct, requiring lower material and construction costs. Due to the suspended state of the beams, this structural system possesses high stiffness and stability under load, capable of withstanding large horizontal and vertical loads, making it suitable for engineering projects requiring high load-bearing capacity. Compared to the complex geometry of single-layer reticulated shells, the design and construction of suspended beams are simpler and more convenient. During steel roof construction, no scaffolding is required for installation of the suspended beams; they are simply hoisted to their original positions on the roof for installation. Suspended beam structures are generally implemented through simplified and standardized construction methods, allowing multiple wavy suspended beams to be installed simultaneously, thus saving design and construction time. Suspension beam structures are widely applicable to different types of engineering projects. Furthermore, due to their simple construction, maintenance and repair are relatively easy to carry out, and any components that require maintenance or replacement can be replaced relatively easily. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a wave-shaped double-suspension beam structure and its construction method according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the main control parameters of the hyperbolic cosine function of the catenary in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the initial roof main load-bearing beam lines and building skin structure in an embodiment of the present invention;

[0025] Figure 4 This is one of the structural schematic diagrams of the first suspended beam structure formed by converting the initial main load-bearing beam lines into catenary lines in an embodiment of the present invention.

[0026] Figure 5 This is the second schematic diagram of the structure of the first suspended beam structure formed by converting the initial main load-bearing beam lines into catenary lines in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the optimized building skin surface formed by the main load-bearing beam line of the catenary in an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of the initial internal continuous beam structure is obtained by projecting the horizontal continuous beam onto the curved surface in an embodiment of the present invention.

[0029] Figure 8 This invention provides an embodiment of a horizontal continuous beam reconstructing into a catenary shape based on the catenary formula, which is one of the structural schematic diagrams of a secondary suspended beam structure.

[0030] Figure 9 This is the second structural schematic diagram of a secondary suspended beam structure, which reconstructs a horizontal continuous beam into a catenary shape according to the catenary formula in an embodiment of the present invention.

[0031] Figure 10 This is a schematic diagram of the integral bending and forming of a horizontal continuous suspended beam according to an embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure before the installation of the internal suspension beam tie rod in an embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the overall structural effect after installing the internal suspension beam tie rod in an embodiment of the present invention;

[0034] Figure 13 This is a schematic flowchart illustrating a construction method for a wave-shaped double-suspension beam structure according to an embodiment of the present invention.

[0035] Figure 14 Schematic diagram of column top support node installation according to an embodiment of the present invention Figure 1 ;

[0036] Figure 15 Schematic diagram of column top support node installation according to an embodiment of the present invention Figure 2 ;

[0037] Figure 16 This is a schematic diagram of the installation of the main load-bearing beam of the roof according to an embodiment of the present invention;

[0038] Figure 17 A schematic diagram illustrating the installation of the internal continuous suspension beam and suspension beam tie rods in an embodiment of the present invention. Figure 1 ;

[0039] Figure 18A schematic diagram illustrating the installation of the internal continuous suspension beam and suspension beam tie rods in an embodiment of the present invention. Figure 2 ;

[0040] Figure 19 This is a schematic diagram showing the completed installation of the wave-shaped double-suspension beam structure steel roof according to an embodiment of the present invention.

[0041] In the attached diagram: 1. Main load-bearing suspension beam; 2. Internal continuous suspension beam; 3. Internal suspension beam tie rod; 4. Support column; A. Support node; a1. Universal fixed support; a2. Rigid connection node of main load-bearing beam; a3. Supporting steel column. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] In this invention, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0046] like Figure 1 and Figure 2As shown, a wave-shaped double-suspension beam structure and its construction method are disclosed. The double-suspension beam structure includes a main load-bearing suspension beam 1, an internal continuous suspension beam 2, an internal suspension beam tie rod 3, and a support column 4. Both the main load-bearing suspension beam 1 and the internal continuous suspension beam 2 are catenary-shaped. The main load-bearing suspension beams 1 are rigidly connected to each other via rigid nodes. The support column 4 is connected to the rigid nodes of the main load-bearing suspension beam 1. The internal continuous suspension beam 2 is fixedly connected to the main load-bearing suspension beam 1, and the internal suspension beam tie rod 3 is connected to the internal continuous suspension beam 2. Several of these double-suspension beam structures constitute a wave-shaped double-suspension beam structure system. This invention uses catenaries to mathematically deconstruct the double-suspension beam structure. The structural components exhibit superior buckling stability under vertical loads and wind suction loads. The structural system uses low steel consumption and has excellent mechanical and economic performance.

[0047] Specifically, in this embodiment, both the main load-bearing suspension beam 1 and the internal continuous suspension beam 2 are continuously curved catenary shapes. The main control parameters of the hyperbolic cosine function describing the catenary include the height difference Δh from the start point to the end point of the catenary, the horizontal projection distance L from the start point to the end point, and the length l of the catenary. The main load-bearing suspension beam 1 is set to be composed of a catenary with a planar projection length L, a height difference Δh, and a true curve length l. An xoy rectangular coordinate system is established based on the lowest point of the catenary. Then, the equation of the catenary satisfies y(x)=1 / k[cosh(kx)-1], where k satisfies cosh(kL)-1=k 2 / 2(l 2 -Δh 2 ).

[0048] Specifically, in this embodiment, a unique catenary is set based on the initial structural beam line with an elevation difference Δh between two points, a planar projection distance L, and a length l.

[0049] Specifically, in this embodiment, the internal suspension beam tie rod 3 is a tension / compression rod or a steel tie rod.

[0050] Specifically, in this embodiment, the two ends of the main load-bearing suspension beam 1 are rigidly connected.

[0051] Specifically, in this embodiment, the rigid node of the support column 4 and the main load-bearing suspension beam 1 is fixedly connected by a universal hinge support.

[0052] Specifically, in this embodiment, the internal continuous suspension beam 2 and the main load-bearing suspension beam 1 are fixedly connected by hinge or welding.

[0053] Specifically, in this embodiment, the internal suspension beam tie rod 3 and the internal continuous suspension beam 2 are connected by bolts or pins.

[0054] Specifically, in this embodiment, the main load-bearing suspension beam is a continuously curved member forming a catenary shape. It should be noted that, since the main load-bearing suspension beam is the primary tension member, high-strength steels such as Q420GJ and Q460GJ are considered for use to reduce the cross-sectional height and steel consumption of the main load-bearing beam.

[0055] Specifically, in this embodiment, the main load-bearing suspension beam 1 between adjacent waves shares a common catenary, and multiple secondary suspension beam structures are combined to form a wave-shaped secondary suspension beam structure.

[0056] Reference Figures 12 to 17 Where A is the support node; a1 is the universal fixed support; a2 is the rigid connection node of the main load-bearing beam; and a3 is the supporting steel column.

[0057] Specifically, in this embodiment, a construction method for a wave-shaped double-suspension beam structure includes the following steps:

[0058] Step S1: After the civil structure is completed, install the support nodes on the top of the concrete columns supporting the roof, including universal fixed supports and rigid connection nodes of the main load-bearing beams.

[0059] Step S2: Assemble the main load-bearing suspension beam on the ground, hoist the entire beam to its original position on the roof, and install the main load-bearing suspension beam; (no formwork is required for this step)

[0060] Step S3: Assemble the internal continuous suspended beam on the ground, hoist the whole structure to the original position on the roof, and install the internal continuous suspended beam; (no frame is required for this step)

[0061] Step S4: Install tie rods for the internal continuous suspension beams of two adjacent frames;

[0062] Step S5: Repeat steps S3 to S4 to complete the assembly of a single wavy roof.

[0063] Step S6: Repeat steps S1 to S5. Multiple wavy suspended beam structures can be constructed simultaneously until all wavy suspended beam structures on the roof are installed.

[0064] Example:

[0065] Construction process of a wave-shaped double-suspension beam structure and its construction method:

[0066] (1) Initial roof main load-bearing beam lines and building skin; refer to Figure 3 .

[0067] (2) The initial main load-bearing beam lines are transformed into catenary lines to form the first suspended beam structure; refer to Figure 4 and Figure 5 .

[0068] (3) The optimized building skin surface is formed by the main load-bearing beam lines of the catenary; refer to Figure 6 .

[0069] (4) Project the horizontally oriented internal continuous beam onto the curved surface to obtain the initial internal continuous beam structure (non-catenary linear). (Refer to...) Figure 7 .

[0070] (5) Based on the catenary formula, the horizontally continuous beam inward is reconstructed into a catenary shape, resulting in a secondary cantilever beam structure. (Refer to...) Figure 8 and Figure 9 .

[0071] (6) The horizontally continuous inward suspended beam 2 is integrally bent and formed, and is bolted or welded to the main load-bearing suspended beam 1. (Refer to...) Figure 10

[0072] (7) Install the internal suspension beam tie rod 3. The internal suspension beam tie rod 3 is connected to the horizontally continuous internal suspension beam by bolts or pins. (Refer to...) Figure 11 .

[0073] (8) Overall structural effect, refer to Figure 12 .

[0074] The beneficial effects of this invention are:

[0075] The suspended beam structure proposed in this invention exhibits excellent mechanical and economic performance. This invention uses a catenary to mathematically deconstruct the double-layered suspended beam structure, resulting in superior buckling stability under both vertical and wind-induced loads. The structural system uses less steel and demonstrates excellent mechanical and economic performance. Compared to traditional single-layered reticulated shells, the suspended beam structure of this invention is generally easier to design and construct, requiring relatively lower material and construction costs. Due to the suspended state of the beams, this structural system possesses high stiffness and stability under load, allowing it to withstand large horizontal and vertical loads, making it suitable for engineering projects requiring high load-bearing capacity. Compared to the complex geometry of single-layered reticulated shells, the design and construction of suspended beams are relatively simple. During steel roof construction, the installation of suspended beams does not require a formwork; the beams are simply lifted to their original position for installation. Suspended beam structures can typically be implemented through simplified and standardized construction methods, allowing multiple new wave-shaped suspended beams to be installed simultaneously, thus saving design and construction time. Suspension beam structures are highly adaptable and suitable for various types of engineering projects. Furthermore, due to their simple construction, maintenance and repair are relatively easy. Any components requiring maintenance or replacement can be replaced relatively easily.

[0076] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A wave-shaped double-suspension beam structure, characterized in that: The double-cantilever beam structure includes a main load-bearing cantilever beam, an internal continuous cantilever beam, internal cantilever beam tie rods, and support columns. Both the main load-bearing cantilever beam and the internal continuous cantilever beam are catenary-shaped. The main load-bearing cantilever beams are rigidly connected to each other via rigid nodes. The support columns are connected to the rigid nodes of the main load-bearing cantilever beams. The internal continuous cantilever beams are fixedly connected to the main load-bearing cantilever beams, and the internal cantilever beam tie rods are hinged to the internal continuous cantilever beams. Several of these double-cantilever beam structures constitute a wave-shaped double-cantilever beam structure system. Both the main load-bearing cantilever beam and the internal continuous cantilever beam are continuously curved catenary shapes. The main control parameters of the hyperbolic cosine function describing the catenary include the elevation difference Δh from the start point to the end point of the catenary and the horizontal projection distance from the start point to the end point. L Catenary length l The length of the main load-bearing suspended beam is set by its planar projection. L elevation difference Δh The actual length of the curve is l The catenary is constructed based on the lowest point of the catenary. xoy In a rectangular coordinate system, the equation of the catenary satisfies y ( x ) = 1 / k [ cosh ( kx )-1], where k satisfy cosh ( kL ) -1 = k 2 / 2( l 2 - Δh 2 ).

2. The wave-shaped double-suspension beam structure according to claim 1, characterized in that: Due to the difference in elevation between two points Δh Planar projection distance L ,length l A unique catenary is set for the initial structural beam line.

3. The wave-shaped double-suspension beam structure according to claim 1, characterized in that: The internal suspension beam tie rod is a tension / compression rod or a steel tie rod.

4. The wave-shaped double-suspension beam structure according to claim 1, characterized in that: The two ends of the main load-bearing suspension beam are rigidly connected, and the main load-bearing suspension beam is fixedly connected by rigid nodes.

5. The wave-shaped double-suspension beam structure according to claim 1, characterized in that: The support column and the rigid node of the main load-bearing suspension beam are fixedly connected by a universal hinge support.

6. The wave-shaped double-suspension beam structure according to claim 1, characterized in that: The internal continuous suspension beam is fixedly connected to the main load-bearing suspension beam by hinge or welding.

7. The wave-shaped double-suspension beam structure according to claim 1, characterized in that: The internal suspension beam tie rod is connected to the internal continuous suspension beam by bolts or pins.

8. The wave-shaped double-suspension beam structure according to claim 1, characterized in that: The main load-bearing suspension beam is a catenary shape formed by continuously curved rods. The main load-bearing suspension beams between adjacent waves share a common catenary. Multiple secondary suspension beam structures are combined to form a wave-shaped secondary suspension beam structure system.

9. A construction method for a wave-shaped double-suspension beam structure as described in any one of claims 1-8, characterized in that, Includes the following steps: Step S1: After the civil structure is completed, install the support nodes on the top of the concrete columns supporting the roof, including universal fixed hinge supports and rigid connection nodes of the main load-bearing beams. Step S2: Assemble the main load-bearing suspension beam on the ground, hoist the whole beam to the original position on the roof, and install the main load-bearing suspension beam; Step S3: Assemble the internal continuous suspended beam on the ground, hoist the whole beam to the original position on the roof, and install the internal continuous suspended beam. Step S4: Install tie rods for the internal continuous suspension beams of two adjacent frames; Step S5: Repeat steps S3 to S4 to complete the assembly of a single wavy roof. Step S6: Repeat steps S1 to S5. Multiple wavy suspended beam structures can be constructed simultaneously until all wavy suspended beam structures on the roof are installed.

Images