Structural system and design method of oblique tie-rod single-layer spherical greenhouse reticulated shell

Abstract

The invention belongs to the technical field of large-span greenhouse space structural design in civil engineering and discloses a diagonal pull rod type single-layer spherical greenhouse latticed shell system and a design method thereof. The latticed shell system comprises a bidirectional lattice type single-layer spherical latticed shell, and diagonal pull rods are arranged at lattice diagonal positions in the bidirectional lattice type single-layer spherical latticed shell and / or outside the lattice shell surface. The design method includes: constructing a latticed shell structural model, and designing a diagonal pull rod scheme; adopting finite element software ANSYS for developing of a whole elastoplasticity analysis process to analyze influences of a pull rod arrangement form and prestress to an ultimate load of the spherical greenhouse latticed shell, and verifying and determining a structural design scheme of the diagonal pull rod type single-layer spherical greenhouse latticed shell system. By arrangement of the pull rods in the bidirectional lattice surface, internal rigidity of the structural surface is improved; by arrangement of the pull rods outside the lattice shell surface, external rigidity of the structural surface is improved, and the prestress in a certain range is applied to improve structural bearing capacity, and the structure has advantages of high light transmittance, low material consumption, high rigidity and the like.

Description

technical field [0001] The invention specifically relates to an oblique tie-rod type single-layer spherical greenhouse reticulated shell structure system and a design method thereof, and belongs to the technical field of large-span greenhouse space structure design in civil engineering. Background technique [0002] The single-layer spherical reticulated shell has a beautiful appearance and various grid forms, and is widely used in the engineering design of long-span spatial structures. The most common grid forms of single-layer spherical reticulated shells are triangles and quadrilaterals. In terms of reticulated shell consumables and lighting, quadrilateral spherical reticulated shells are better than triangular ones, but quadrilateral spherical reticulated shells have lower rigidity and poor stability. As the span increases, how to enhance the out-of-plane stiffness of the spherical reticulated shell structure to ensure the stability of the single-layer spherical reticula...

AI Technical Summary

Problems solved by technology

Domestic research on the stability of single-layer spherical reticulated shells has achieved fruitful results, but the design scheme for arranging tie rods outside the surface of single-layer spherical reticulated shells has not yet appeared, and there is currently a lack of engineering examples of such structures

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