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Method for analyzing reliability of construction error of grid structure based on buckling mode combination

A grid structure and buckling mode technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of difficult and effective application, large scale of random variables in the spatial geometric position of nodes, etc.

Inactive Publication Date: 2012-09-19
SOUTHEAST UNIV
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Problems solved by technology

However, due to the large scale of random variables in the geometric position of nodes in the grid structure, the traditional stochastic reliability analysis method is difficult to be effectively applied

Method used

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  • Method for analyzing reliability of construction error of grid structure based on buckling mode combination
  • Method for analyzing reliability of construction error of grid structure based on buckling mode combination
  • Method for analyzing reliability of construction error of grid structure based on buckling mode combination

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Embodiment Construction

[0061] The present invention will be described in detail below in conjunction with the accompanying drawings. The flow chart of the grid structure construction error reliability analysis method based on buckling mode combination of the present invention is as follows figure 1 Shown, the detailed steps of the inventive method are as follows:

[0062] 1) Analysis preparation.

[0063] Determine the design reference coordinates of the grid structure nodes according to the grid structure design drawings{ D}, used constraints, geometric topological relations, material properties and section properties; determine the variation interval of node construction error according to relevant specifications or engineering experience [- R , R ], and determine its probability distribution function, that is, the node installation error obeys the normal distribution within the range of double mean square error; determine the maximum node displacement overrun control value according to the rel...

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Abstract

The invention discloses a method for analyzing the reliability of a construction error of a grid structure based on a buckling mode combination. According to the characteristic that the construction error of nodes influences the stress performance of the grid structure, random distribution of assembly deviations of the nodes is similarly fitted by adopting a random linear combination of a plurality of orders of buckling modes in front of the structure, and the advantages of a response surface methodology and the advantages of a monte carlo method are effectively fused. By adopting the method for analyzing the reliability of the construction error of the grid structure based on the buckling mode combination, a multi-order mode of the structure is acquired by analyzing the buckling of the structure, and the random distribution of the assembly deviations is similarly fitted according to the random linear combination of the buckling modes; a combination result is normalized to an allowance variation interval of the construction error of the nodes, so that the random variable scale of analysis for the reliability is greatly reduced; and the advantages of the response surface methodology and the advantages of the monte carlo method are effectively fused, so that the reliable index of the influence of the construction error on the stress performance of the structure can be efficiently and accurately calculated.

Description

technical field [0001] The invention belongs to the field of numerical analysis and design of a spatial grid structure, and relates to a reliable index analysis method of a grid structure under the random influence of construction errors. Background technique [0002] The grid structure is a rod system structure system composed of multiple rods arranged in several directions according to certain rules, including: planar trusses, three-dimensional trusses, space grids, space reticulated shells and other typical structural types. Due to the advantages of light weight, strong spanning ability, novel structure, easy fabrication and installation, high safety redundancy, and good seismic performance, the grid structure has been widely used in various public buildings and industrial buildings in recent years. [0003] In the grid structure system, the node is the core connecting multiple converging members. The positional deviation of the nodes during installation and construction...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 周臻周志高冯玉龙孟少平吴京王永泉
Owner SOUTHEAST UNIV
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