Method of monitoring collapse risk of steel-structured building in fire

A technology of risk monitoring and steel structure, which is applied to the monitoring of steel structure building collapse risk in fire, based on digital close-range photogrammetry in the field of steel structure building collapse risk monitoring in fire, which can solve the problems of low accuracy and fire damage, and achieve applicable sex high effect

Active Publication Date: 2017-05-31
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0002] The material properties and mechanical properties of ordinary structural steel are very sensitive to high temperature, so they are extremely vulnerable to fire damage. As for the risk of steel structure collapse in a fire

Method used

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  • Method of monitoring collapse risk of steel-structured building in fire
  • Method of monitoring collapse risk of steel-structured building in fire

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0026] Such as figure 1 and 2 As shown, the monitoring methods for the collapse risk of steel structure buildings in fire include:

[0027] S1. Set artificial signs on the facade of the steel structure building that plays a load-bearing role.

[0028] The artificial signs include deformation points and control points, which are arranged in the form of an orthogonal grid. The deformation points are arranged on the main components and heat-sensitive points along the steel structure at a certain interval; the control points are set on the facade of the steel structure The number should be more than 8 on the four corners and the center point of the . In order to facilitate reading, the color shou...

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Abstract

The invention discloses a method of monitoring collapse risk of a steel-structured building in a fire; taking pre-fire and post-fire photos of a site by means of digital close-range photogrammetry, processing the pre-fire and post-fire photos to obtain their spatial coordinates, comparing, calculating deformation of a steel structure, and determining a building has collapse risk if the deformation is greater than the bearing capacity limit of the steel structure. The technical blank in the field of collapse risk of steel-structured buildings is filled, and the method has the advantages of good economy, high performance and good accuracy, and is highly applicable and suitable for various steel-structured buildings, including the various buildings such as plants, workshops, residential buildings, integrated commercial centers and the like.

Description

technical field [0001] The invention relates to a method for monitoring the collapse risk of a steel structure building during a fire, in particular to a method for monitoring the collapse risk of a steel structure building during a fire based on digital close-range photogrammetry, and belongs to the field of fire monitoring during a fire. Background technique [0002] The material properties and mechanical properties of ordinary structural steel are very sensitive to high temperature, so they are extremely vulnerable to fire damage. As for the risk of steel structure collapse in a fire, at this stage, we can only rely on the duration of the fire and the naked eye to make a rough empirical judgment, and the accuracy is very low. Therefore, there is an urgent need for an economical, efficient and accurate monitoring method. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a method for monitoring the collapse r...

Claims

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Application Information

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IPC IPC(8): G01C11/04G01B11/16
CPCG01B11/16G01C11/04
Inventor 张国维黄迪朱国庆陶海军赵永昌孟庆璇潘荣亮于淼淼
Owner CHINA UNIV OF MINING & TECH
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