Calculation method of importance coefficient of structural component based on P-M bearing capacity curve

Abstract

The present invention discloses a calculation method of the importance coefficient of a structural component based on the P-M bearing capacity curve. The method is characterized by taking the relationship between the anti-bending bearing capacity M and the axial bearing capacity P when the component cross-section material is broken to draw a P-M correlation curve and a stability control curve, andobtaining the component safety stress area surrounded by two curves. The specific calculation comprises: drawing of P-M and stability control curves, calculation of bearing capacity coefficients PMjand PM'j, calculation of the importance coefficient IFi and evaluation of the importance of the component. Compared with the prior art, the method disclosed by the present invention has a clear physical meaning and a wide application range, and provides sufficient and reliable parameters for anti-continuous collapse design of the key component, obtains intuitive, quantitative and accurate component safety redundancy, intuitively reflects the safety reserve of the component in the overall structure and the remaining structure, and is especially applicable to the safety analysis of the anti-collapse design of the high-rise structure.

Description

technical field

[0001] The invention relates to the technical field of structure anti-collapse design, in particular to a method for calculating the importance coefficient of structural parts based on the component P-M bearing capacity curve. Background technique

[0002] The safety of the structure is the primary issue of structural design, and the collapse and damage of buildings has always been the main source of casualties and equipment damage. When carrying out structural design of actual projects, it is often necessary to carry out anti-continuous collapse design to avoid structural damage. Cascading failures occur after local failures under accidental loads, resulting in large-scale collapses. There are many reasons for accidental loads, such as explosions, impacts, fires, human errors, etc., and the location, time, and degree of their occurrence are highly random. At present, the anti-progressive collapse design mainly adopts the method of demolishing components, th...

Examples

Embodiment 1

[0034] See attached figure 1 , the present invention calculates the importance coefficient of the component according to the following steps:

[0035] Step 1: For all components in the complete structure, according to the section information of the component, calculate the relationship between the bending capacity M and the axial bearing capacity P when the material of the component section is damaged, and draw the P-M correlation curve; according to the section information of the component Information, calculated length and boundary conditions of members, combined with the current design codes, calculate the bearing capacity limit of the member under the conditions of compression, bending and bending, and draw the stability control curve to obtain the P-M correlation curve and the area surrounded by the stability control curve is the safe stress area of ​​the component.

[0036] a. Draw P-M curve

[0037] See attached figure 2 , the complete structure 1 is a single steel ...

technical field

[0001] The invention relates to the technical field of structure anti-collapse design, in particular to a method for calculating the importance coefficient of structural parts based on the component P-M bearing capacity curve. Background technique

[0002] The safety of the structure is the primary issue of structural design, and the collapse and damage of buildings has always been the main source of casualties and equipment damage. When carrying out structural design of actual projects, it is often necessary to carry out anti-continuous collapse design to avoid structural damage. Cascading failures occur after local failures under accidental loads, resulting in large-scale collapses. There are many reasons for accidental loads, such as explosions, impacts, fires, human errors, etc., and the location, time, and degree of their occurrence are highly random. At present, the anti-progressive collapse design mainly adopts the method of demolishing components, th...

Examples

Embodiment 1

[0034] See attached figure 1 , the present invention calculates the importance coefficient of the component according to the following steps:

[0035] Step 1: For all components in the complete structure, according to the section information of the component, calculate the relationship between the bending capacity M and the axial bearing capacity P when the material of the component section is damaged, and draw the P-M correlation curve; according to the section information of the component Information, calculated length and boundary conditions of members, combined with the current design codes, calculate the bearing capacity limit of the member under the conditions of compression, bending and bending, and draw the stability control curve to obtain the P-M correlation curve and the area surrounded by the stability control curve is the safe stress area of ​​the component.

[0036] a. Draw P-M curve

[0037] See attached figure 2 , the complete structure 1 is a single steel ...

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