A damage assessment method for building walls in explosion accidents

A technology for building walls and explosion accidents, which is applied in the fields of instruments, complex mathematical operations, design optimization/simulation, etc., can solve problems such as the inability to accurately evaluate the anti-explosion performance of walls, and achieve the effect of accurate evaluation.

Active Publication Date: 2022-04-08
CHINA UNIV OF PETROLEUM (EAST CHINA)
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AI Technical Summary

Problems solved by technology

For the dynamic calculation of structures impacted by transient explosions, the static load method is no longer applicable, and the force of the one-way plate is quite different from the actual force of the wall, which cannot accurately evaluate the anti-blast performance of the wall

Method used

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  • A damage assessment method for building walls in explosion accidents
  • A damage assessment method for building walls in explosion accidents
  • A damage assessment method for building walls in explosion accidents

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Embodiment Construction

[0092] The invention provides a method for assessing building wall damage in an explosion accident, which mainly includes the following steps:

[0093] Step 1. Based on the equivalent single-degree-of-freedom method, the motion equation of the response of the wall component under the action of the explosion load is established;

[0094] Based on the equivalent single-degree-of-freedom method, the motion of the building wall is simplified to a one-dimensional motion in the characteristic direction, such as figure 1 shown.

[0095] In the equivalent single-degree-of-freedom system, four basic forces are defined: equivalent external load, equivalent resistance force, inertial force, and damping force. The equivalent external load is the instantaneous dynamic force from the explosion, namely F e (t). The equivalent resistance comes from the restoring force of the spring element in the model and the structural potential energy, with K e x(t) means. The inertial force is define...

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Abstract

The invention discloses a method for assessing the damage of a building wall in an explosion accident. Select the iterative solution time interval for the vibration period to determine the component displacement recursion formula; (3) solve the displacement by combining the displacement recursion formula and the motion equation, and draw the displacement curve of the equivalent degree of freedom system with time, and obtain The peak displacement of the component; (4) According to the peak displacement of the component, the support rotation angle of the component is obtained, and the damage effect of the explosion on the wall component is evaluated by the support rotation angle. The invention considers the influence of the damping of the structural dynamic system, and considers the support force around the wall at the same time through the two-way force model, which is closer to the actual force on the wall, and can evaluate the explosion more accurately than the one-way force model Damage to building walls during accidents.

Description

technical field [0001] The invention relates to the technical field of building anti-blast performance evaluation, in particular to a method for evaluating damage to building walls in explosion accidents. Background technique [0002] Explosion accidents in petrochemical sites are extremely destructive, often causing heavy casualties and economic losses. For buildings with a concentration of people, according to relevant research, up to 75% of the casualties in explosion accidents come from the splash damage caused by the explosion caused by fragments of building glass, walls, etc., that is, secondary fragment damage, rather than from the blast wave. direct-acting damage. [0003] New construction of anti-blast buildings, improvement of anti-blast capabilities of existing buildings, and prevention of domino effects caused by explosion accidents, overall collapse of buildings and splashing of explosion debris can significantly reduce property losses and casualties in explosi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F17/11G06F119/14
CPCG06F30/20G06F17/11G06F2119/14
Inventor 顾蒙王旱祥王琼
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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