Wind-resistant design method for cable-membrane structure based on loose coupling technology

Abstract

The invention provides a wind-resistant design method for a cable-membrane structure based on a loose coupling technology, which comprises the following steps of: 1, establishing a cable-membrane structure finite element model by a form-finding method according to the physical property of an actual material and the initial prestress of the structure; 2, establishing a cable-membrane structure fluid computation model according to a form-finding result in the step 1 and the ambient environment of a building; 3, taking a wind tunnel test or actually measured data or theoretical analog wind speedtime interval data as the inlet boundary condition of fluid computation; and 4, performing the wind-resistant design of the membrane structure by using a fluid-solid coupling cooperative platform. Bythe method, the problem of convergence in the conventional cable-membrane structure fluid-solid coupling computation is solved, and the computation speed is improved; and computation accuracy is obviously improved compared with that of the conventional simplified method and a unilateral coupling method, and the computation speed is high, so the technology is developed from scientific research to actual application.

Description

technical field [0001] The invention belongs to the field of wind-resistant analysis and design of cable-membrane structures in the construction industry, and in particular relates to a method for wind-resistant design of cable-membrane structures based on loose coupling technology. Background technique [0002] The fluid-solid interaction phenomenon plays a very important role in civil engineering fields such as cable-stayed bridges, super high-rise buildings, mast structures, transmission lines, and cable-membrane structures (M.Gluck, M.Breuer, F.Durst, A.Halfmann, E. Rank. Computation of wind-induced vibrations of flexible shells and membrane structures [J]. Journal of Fluids and Structures 17(2003) 739-765.). In the past, due to the lack of understanding of fluid-solid interaction phenomena, there have been major disasters such as the collapse of the Tay Bridge in Scotland in 1879, the wind-induced collapse of the Tacoma Bridge in Seattle in 1948, and the collapse of thr...

AI Technical Summary

Problems solved by technology

The main reasons are as follows: (1) Using a simple loose coupling method will generate excessive acceleration on the membrane structure, resulting in unstable solution (Takushi Nomura and Masato Shenmei, Fluid-solid coupling analysis of membrane structures based on ALE finite element method, application Collection of Mechanics. Vol.1, pp: 241-251, 1998)

(2) The complex interpolation method has a huge amount of calculation and lacks engineering operability (Sun Xiaoying, Research on Fluid-Structure Coupling Effect in Wind-induced Response of Membrane Structures [D], Harbin Institute of Technology Doctoral Dissertation, January 2007)

(3) Lack of effective message transfer and unified data transfer interface between different software

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