Ensuring the required level of reliability during the design stage of -latticed shells with a large opening

Abstract

The article describes the design technique, which is based on determination of numerical parameters pertaining to reliability of long-span latticed roofs with a large opening formed using the system made of rigid threads. The suggested algorithm is based on experimental and fundamental research focused on the stress/strain state of a spatial roof model and the operation of design combination of loads. It suggests a solution to a series of problems: determining rational geometric parameters for a structure; obtaining corresponding rigid characteristics of the principal load-bearing members; determining the trajectory of member failure for a typical shell structure with a resulting estimation of stress/ strain state of a structure; determining numerical parameters of reliability of a designed structure (determining the lower and upper limits of reliability). The proposed algorithm is limited by static loads and state requirements on strength limits. The example of a design for a spatial latticed shell formed using the system of flexurally stiff threads has been given according to the above-described algorithm.

Keywords:

• spatial suspended latticed roof
• flexurally stiff threads
• reliability parameters
• stress/strain state (SSS)
• snow load

Additional information

Notes on contributors

Yevgen Gorokhov

Yevgen GOROKHOV. Dr Sc., Professor, Head of the Metal Structure Department of Donbas National Academy of Civil Engineering and Architecture. Doctor of technical sciences, 1992. Rector at DonNACEA. Research interests: a complex evaluation of technical condition, operation, durability and reliability of metal structures of buildings and structures; concept development and registration systems for monitoring of the technical condition of buildings and structures.

Volodymyr Mushchanov

Volodymyr MUSHCHANOV. Dr Sc., Professor, Head of the Theoretical and Applied Department of Donbas National Academy of Civil Engineering and Architecture. Doctor of technical sciences, 1997. Vice Rector for Research activity at DonNACEA. Research interests: new methods of calculation and design of thin-walled spatial structures in the form of large-shells; probabilistic analysis of stress-strain state in the form of the finite element method; engineering methods for assessing of the structures reliability.

Iurii Pryadko

Iurii PRYADKO. PhD Eng. at Fundamental and Applied Mechanics department of Donbas National Academy of Civil Engineering and Architecture (DonNACEA). Research interests: metal structures, design technique and design work, mathematical analysis, testing of buildings and structures, computer modeling of building structures, building materials, inspection of the building structures.