Step-by-step diagnosis method for node weld seam damage of welded spatial grid structure

A grid structure and welding space technology, which is applied to the testing of machines/structural components, measuring devices, instruments, etc., can solve problems such as difficult to realize and complex force, and achieve small calculation, strong anti-noise ability, and easy to implement Effect

Active Publication Date: 2019-03-22
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the large number of nodes and rods in the space grid structure, the stress is very complicated, and it is difficult to achieve engineering by relying on conventional damage diagnosis methods.

Method used

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  • Step-by-step diagnosis method for node weld seam damage of welded spatial grid structure
  • Step-by-step diagnosis method for node weld seam damage of welded spatial grid structure
  • Step-by-step diagnosis method for node weld seam damage of welded spatial grid structure

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Embodiment Construction

[0050] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings and Example 1, which is convenient for a clear understanding of the present invention, but they do not limit the present invention.

[0052] Such as figure 1 As shown, the step-by-step diagnosis method for weld damage of welded space grid structure nodes in the present invention is mainly divided into two steps: the first step is to identify the structural damage sub-region; the second step is to judge the occurrence of weld damage in the damage sub-region location and degree of weld damage. These two steps are realized through the organic combination of multi-intelligence methods such as node acceleration response...

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Abstract

The invention provides a step-by-step diagnosis method for a node weld seam damage of a welded spatial grid structure. The method is characterized by comprising the following steps: firstly, dividingthe structure into a plurality of sub-areas according to wavelet analysis or power spectrum density sensitivity analysis of structure acceleration response, and identifying a sub-area having the nodeweld seam damage; and then determining a damaged location of a node in the sub-area having the node weld seam damage, and assessing the damage level. The objective of the invention is to provide the step-by-step diagnosis method for the node weld seam damage of the welded spatial grid structure in view of the defects in the prior art, so that damage positioning and damage level assessment are simple and easy.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a method for diagnosing weld seam damage of welded space grid structure nodes. Background technique [0002] The welded space grid structure is mostly used in exhibition halls, gymnasiums, theaters, etc., and is a very widely used civil engineering structure. Because such structures are mostly used in densely populated public places, they are often the landmark buildings of a city, so once they have engineering accidents, they will cause huge economic losses and extremely bad social impacts. [0003] The space grid structure is a net-shaped space bar system structure composed of bars passing through nodes according to certain rules, and is connected by round steel pipes and welded hollow ball nodes to form an overall structure. Wind load is the main design load of this type of structure, and wind disasters occur very frequently. Under the action of win...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M99/00
CPCG01M99/004
Inventor 刘晖黎世源郭佳凡陈世超申韶丁雷电倪新舟胡馨莹王雪亮周强籍步荣王钱王倩朱胜男查启斌
Owner WUHAN UNIV OF TECH
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