CN117188686B - A hybrid tensioned mesh structure and its application method - Google Patents
A hybrid tensioned mesh structure and its application methodInfo
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- CN117188686B CN117188686B CN202311178642.6A CN202311178642A CN117188686B CN 117188686 B CN117188686 B CN 117188686B CN 202311178642 A CN202311178642 A CN 202311178642A CN 117188686 B CN117188686 B CN 117188686B
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Abstract
The invention provides a hybrid string stretching grid structure, which relates to the field of string stretching beam structures and comprises a stretching two-rod structure unit with two rods, wherein the stretching two-rod structure unit is configured to form a three-jaw orthogonal rod assembly when being deformed, two groups of three-jaw orthogonal rod assemblies are arranged oppositely and at a certain rotation angle and are connected through connecting rods, and the boundaries of the two groups of three-jaw orthogonal rod assemblies are enclosed through stretching cables to form the hybrid string stretching grid structure. The hybrid string grid structure is a self-balancing structure unit, can adapt to positive and negative bidirectional load action, keeps structural stability, and solves the problem that the existing string beam roof structure can keep the prestress form only by adding a stabilizing pull rod to tie and fix the pull rope due to the fact that the pull rope changes the prestress form under negative load actions such as wind pressure suction and the like.
Description
Technical Field
The invention relates to the technical field of beam string structures, in particular to a hybrid beam string grid structure and a using method thereof.
Background
And a beam string, a prestress steel structure. In the 80 s of the 20 th century, a rigid-flexible hybrid structure consisting of a top-chord rigid member (Beam) and a high-strength tensioning cable/rod (string) and connected by a plurality of stay bars (Strut) is proposed by the Saint university of Japan, external loads are resisted by utilizing shape resistance and pretension, and the system is a high-efficiency large-span space structure system.
The essence of the tension string structure is that prestress is applied to the tension member, and the upper structure generates reverse deflection by the force transmission of the stay bars connecting the upper chord and the lower chord, so that final deflection under the action of load is reduced, the stress state of the upper member is improved, the bending moment distribution is changed, the bending moment peak value is reduced, and the horizontal thrust generated by the structure to the support end is reduced by adjusting the prestress of the tension member, so that the tension string structure becomes a self-balancing system.
However, the existing beam roof structure has better rigidity under the action of positive load, and can maintain the prestress form only by adding a stabilizing pull rod to tie and fix the cable due to the fact that the cable changes the prestress form and is easy to be unstable under the action of negative load such as wind pressure suction and the like.
Disclosure of Invention
The invention discloses a hybrid string grid structure, which aims to improve the technical problems.
The invention adopts the following scheme:
The hybrid string stretching grid structure comprises a stretching two-rod structure unit with two rods, wherein the stretching two-rod structure unit is configured to form a three-jaw orthogonal rod assembly when being deformed, two groups of the three-jaw orthogonal rod assemblies are opposite and are arranged at a certain rotation angle and are connected through a connecting rod, and the boundaries of the two groups of the three-jaw orthogonal rod assemblies are enclosed through a stretching cable to form the hybrid string stretching grid structure.
As a further improvement, the centers of the two groups of three-jaw orthogonal rod assemblies are arranged oppositely, and the connecting rod is connected between the two centers.
As a further improvement, the length of the connecting rod is adjustable.
As a further improvement, the three-jaw orthogonal rod assembly positioned above the two groups of three-jaw orthogonal rod assemblies is an upper chord three-jaw, and the three-jaw orthogonal rod assembly positioned below the two groups of three-jaw orthogonal rod assemblies is a lower chord three-jaw.
As a further improvement, the upper chord three claws and the lower chord three claws are arranged opposite to each other and at a rotation angle of 60 degrees.
As a further improvement, the boundaries of the three claws of the upper chord member and the three claws of the lower chord member are enclosed by the stay ropes to form a regular hexagon.
As a further improvement, the device is suitable for positive and negative bidirectional loading.
The application method based on the hybrid string grid structure comprises the following steps:
when a forward load acts, the three-jaw orthogonal rod assemblies positioned above the two groups of three-jaw orthogonal rod assemblies bear load and are pressed, the tensioning cable is pulled, and the three-jaw orthogonal rod assemblies positioned below the two groups of three-jaw orthogonal rod assemblies assist in pulling;
when negative load acts, the lower three-jaw orthogonal rod assembly of the two groups of three-jaw orthogonal rod assemblies is mainly pressed, the prestress form of the tensioning cable system is stabilized, and the upper three-jaw orthogonal rod assembly is turned into tension.
By adopting the technical scheme, the invention can obtain the following technical effects:
The hybrid string grid structure is a self-balancing structure unit, can adapt to positive and negative bidirectional load action, keeps structural stability, and solves the problem that the existing string beam roof structure is easy to unstably change the prestress form due to the fact that the tension cable is changed under the negative load action of wind pressure suction and the like, and can keep the prestress form only by adding a stable tension rod to tie and fix the tension cable. The internal and external expressive force of the structure is consistent, and the structure has higher richness.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic illustration of a tensioning two-bar structural unit deformed into a three-jaw orthogonal bar assembly in a hybrid string lattice structure of the present invention;
FIG. 2 is a schematic diagram of the overall structure of the hybrid string lattice structure of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Examples
The first embodiment of the invention provides a hybrid string grid structure, which comprises a tensioning two-rod structure unit with two rods, wherein the tensioning two-rod structure unit is configured to form a three-jaw orthogonal rod assembly 20 when being deformed, two groups of three-jaw orthogonal rod assemblies 20 are opposite and are arranged at a certain rotation angle and are connected through a connecting rod 4, and the boundaries of the two groups of three-jaw orthogonal rod assemblies 20 are enclosed through a tensioning cable 3 to form the hybrid string grid structure. The structure is a self-balancing structural unit, can adapt to positive and negative bidirectional load action, keeps structural stability, and solves the problems that the existing beam roof structure is unstable easily due to the fact that the prestress form of a stay cable is changed under the negative load action such as wind pressure suction, and the prestress form can be kept only by adding a stable pull rod to tie and fix the stay cable.
Further, the centers 30 of the two sets of three-jaw orthogonal bar assemblies 20 are disposed opposite to each other, and the connecting bar 4 is connected between the centers 30 to increase the overall rigidity. And the length of the connecting rod 4 can be adjusted to realize the control of the relative stagger degree of the upper chord member and the lower chord member, so as to form roof truss shapes with different degrees.
Referring to fig. 1 and 2, specifically, the three-jaw orthogonal bar assembly 20 located above of the two sets of three-jaw orthogonal bar assemblies 20 is an upper chord three-jaw 1, and the three-jaw orthogonal bar assembly 20 located below is a lower chord three-jaw 2. The upper chord three-jaw 1 and the lower chord three-jaw 2 are opposite and are arranged at a 60-degree rotation angle, and the boundaries of the upper chord three-jaw 1 and the lower chord three-jaw 2 are enclosed by the stay ropes 3 to form a regular hexagon. The 60-degree rotation arrangement enables the boundary between the upper chord three-jaw 1 and the lower chord three-jaw 2 to be successfully enclosed into a regular hexagon through the stay rope 3.
The assembly process comprises the steps of firstly preparing two groups of tensioning two-rod structural units, respectively deforming two rods in the two groups of tensioning two-rod structural units to two groups of three-jaw orthogonal rod assemblies 20, setting the two groups of three-jaw orthogonal rod assemblies 20 to be opposite and form a certain 60-degree rotation angle, enclosing the boundaries of the two groups of three-jaw orthogonal rod assemblies 20 through a tensioning cable 3, and finally connecting a connecting rod 4 between the centers 30 of the two groups of three-jaw orthogonal rod assemblies 20 to complete the assembly of the hybrid string-tensioning grid structure. And when the shape of the hybrid string grid structure is required to be changed, the length of the connecting rod 4 is only required to be adjusted.
The second embodiment of the invention provides a using method based on the hybrid string grid structure, which comprises the following steps:
When a positive load is applied, the three-jaw orthogonal rod assemblies 20 (the upper chord three-jaw 1) positioned above in the two groups of three-jaw orthogonal rod assemblies 20 bear load, the tensioning rope 3 is pulled, the three-jaw orthogonal rod assemblies 20 (the lower chord three-jaw 2) positioned below are assisted to be pulled, and when a negative load is applied, the three-jaw orthogonal rod assemblies 20 (the lower chord three-jaw 2) positioned below in the two groups of three-jaw orthogonal rod assemblies 20 are mainly pressed, and the prestress form of the tensioning rope 3 is stabilized, so that the overall rigidity is maintained, and the three-jaw orthogonal rod assemblies 20 (the upper chord three-jaw 1) positioned above are converted to be pulled.
From the foregoing, it can be seen that the present invention maintains the balance of the overall structure, both under positive and negative loading. Meanwhile, the structure of the invention can be applied to building indoor and outdoor space roofs and landscape facilities, and is more convenient than the traditional two-dimensional beam string structure.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention.
Claims (2)
1. The hybridization string stretching grid structure is characterized by comprising a stretching two-rod structure unit with two rods, wherein the stretching two-rod structure unit is configured to form a three-jaw orthogonal rod assembly when being deformed, two groups of three-jaw orthogonal rod assemblies are opposite and are arranged at a certain rotation angle and are connected through connecting rods, the boundaries of the two groups of three-jaw orthogonal rod assemblies are enclosed through stretching cables to form the hybridization string stretching grid structure, the centers of the two groups of three-jaw orthogonal rod assemblies are opposite, the connecting rods are connected between the two centers, the length of the connecting rods is adjustable, the three-jaw orthogonal rod assembly positioned above in the two groups of three-jaw orthogonal rod assemblies is an upper chord member three-jaw, the three-jaw orthogonal rod assembly positioned below is a lower chord member three-jaw, the three-jaw of the upper chord member three-jaw and the three-jaw of the lower chord member are opposite and are arranged at a rotation angle of 60 degrees, and the boundaries of the three-jaw of the upper chord member three-jaw and the three-jaw of the lower chord member are enclosed through stretching cables to form a regular hexagon.
2. A method of using the hybrid string lattice structure of claim 1, comprising:
when a forward load acts, the three-jaw orthogonal rod assemblies positioned above the two groups of three-jaw orthogonal rod assemblies bear load and are pressed, the tensioning cable is pulled, and the three-jaw orthogonal rod assemblies positioned below the two groups of three-jaw orthogonal rod assemblies assist in pulling;
when negative load acts, the lower three-jaw orthogonal rod assembly of the two groups of three-jaw orthogonal rod assemblies is mainly pressed, the prestress form of the tensioning cable system is stabilized, and the upper three-jaw orthogonal rod assembly is turned into tension.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311178642.6A CN117188686B (en) | 2023-09-13 | 2023-09-13 | A hybrid tensioned mesh structure and its application method |
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| CN202311178642.6A CN117188686B (en) | 2023-09-13 | 2023-09-13 | A hybrid tensioned mesh structure and its application method |
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| CN117188686B true CN117188686B (en) | 2025-11-25 |
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| CN117107909B (en) * | 2023-08-31 | 2025-11-25 | 华侨大学 | A flexible membrane material shading tensioned wire mesh frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN220868583U (en) * | 2023-09-13 | 2024-04-30 | 华侨大学 | A hybrid string grid structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3918715B2 (en) * | 2002-10-25 | 2007-05-23 | 清水建設株式会社 | Roof frame |
| CN106088440A (en) * | 2016-07-03 | 2016-11-09 | 山东建筑大学 | Traffic circle self-balanced cabled truss structure |
| CN112575948B (en) * | 2020-12-09 | 2024-12-31 | 浙江省一建建设集团有限公司 | A roof truss composed of a string beam and a cantilever truss and a construction method thereof |
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