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Metod for monitoring safety of architecture of circular arch net rack

A technology for building structure and safety monitoring, applied in the direction of electromagnetic measuring device, electric/magnetic length/width measurement, program control device, etc. The effect of a catastrophic accident

Inactive Publication Date: 2007-06-20
黄树红
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Problems solved by technology

However, the cost is unacceptable to install sensors for tens of thousands of nodes to monitor their displacement
Moreover, due to the large span of the grid, it is impossible to install sensors to detect the displacement relative to the ground for most of the nodes
Therefore, there is still no means to continuously monitor the overall deformation of the grid structure for a long time.

Method used

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  • Metod for monitoring safety of architecture of circular arch net rack
  • Metod for monitoring safety of architecture of circular arch net rack
  • Metod for monitoring safety of architecture of circular arch net rack

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Embodiment Construction

[0028] Further description will be given below in conjunction with the accompanying drawings and embodiments.

[0029] 1, the present invention is implemented according to the following steps:

[0030] (1) The selection of characteristic nodes, the nodes on the second layer of the network frame are used as the characteristic nodes of displacement monitoring, as shown in Figure 2;

[0031] (2) Use the finite element method to calculate the allowable limit data series of the characteristic nodes, and draw the corresponding displacement curves and displacement difference curves, as shown in Figure 3, Figure 4, and Figure 5;

[0032] (3) Carry out safety monitoring and evaluation on the actual structure according to the following unsafe criteria

[0033] ① Any one of the absolute values ​​of the displacements in the X, Y, and Z directions of all characteristic nodes exceeds the allowable limit;

[0034] ② The difference between the curve shape formed by the characteristic nodes ...

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Abstract

The invention relates to structural characteristics of mechanics, failure mode, monitoring strategy, information acquisition and handling information, and safety diagnosis etc. The invention includes main points: selecting nodes at second layer of net rack as characteristic nodes of displacement to be monitored; calculating out allowable limit data series of characteristic nodes by using method of finite element, and drawing out relevant graph of displacement curve and graph of difference of displacement; installing displacement transducers on characteristic nodes to monitor 3D displacement of characteristic nodes continuously and to determine integral deformation. Forecast is given in advance when deformation reaches danger limit.

Description

technical field [0001] The invention relates to the safety monitoring of the circular arch grid structure, in particular, it relates to the mechanical characteristics of the structure, failure mode, calculation simulation, monitoring strategy, information collection and processing, safety diagnosis and the like. Background technique [0002] The circular arch grid structure is commonly used in large public and industrial buildings. For example, 30 large thermal power plants in China have adopted this structure as the structure of coal storage sheds. The length of these coal storage sheds can reach more than 100 to 200 meters, and the width can reach more than 70 meters. Expensive equipment is arranged in them, and employees work continuously. The structure of a coal storage shed is shown in Figure 1. However, due to various reasons, three coal storage sheds in China have collapsed. In 2000, a coal storage shed with round arch grids in a certain power plant collapsed as a w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/04G06F9/455
Inventor 黄树红高伟贺国强韩守木梁煜堃
Owner 黄树红
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