Calculation Method of Importance Coefficient of Structural Parts Based on p-m Bearing Capacity Curve

Abstract

The invention discloses a method for calculating the importance coefficient of structural parts based on the P-M bearing capacity curve, which is characterized by drawing P-M based on the relationship between the bending bearing capacity M and the axial bearing capacity P when the material of the component section is damaged Relevant curves and stability control curves, to obtain the safe force bearing area of ​​the components surrounded by the two curves, the specific calculation includes: drawing of P‑M and stability control curves, calculation of bearing capacity coefficient PM j and PM' j , Calculate the importance coefficient IF i and evaluation of component importance. Compared with the prior art, the present invention has clear physical meaning and wide application range, provides sufficient and reliable parameters for the anti-progressive collapse design of key components, obtains intuitive, quantitative and relatively accurate component safety redundancy, and intuitive reflection The overall structure and the safety reserve of the components in the remaining structure are especially suitable for the safety analysis of the collapse resistance design of high-rise structures.

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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