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A processing method of a steel structure fiber model

A fiber model and processing method technology, applied in data processing applications, electrical digital data processing, special data processing applications, etc., can solve the problems of inconsistency in the damage degree index, insufficient to reflect the damage form of components, etc., to achieve simple analysis process, The effect of high work efficiency

Active Publication Date: 2019-01-18
ZHONGCHUAN NO 9 DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the damage degree index of components based on strain is not uniform. At the same time, the control of material deformation limit is not enough to reflect the damage mode of components. difference

Method used

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  • A processing method of a steel structure fiber model
  • A processing method of a steel structure fiber model
  • A processing method of a steel structure fiber model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The section steel is H680×400×32×32, and its material strength is the main beam ZL of Q345 1 As an example, γ=1.16 is calculated according to the section parameters of the main beam; E=2.06×105N / mm is obtained according to the material type 2 , f y =345MPa; the ultimate plastic strain of materials commonly used in engineering at present ε u = 2.5%.

[0045] See attached figure 2 , according to the component performance index in the FEMA code, refer to FEMA-356 (Table 5-6), and determine the plastic rotation angle a when the component reaches the ultimate strength C is 4θ y , that is μ a for 4. According to the type of the member and the symmetry of the section, formula (III) is used to calculate the beam n =16.5, that is, the length of the plastic corner section 2 is 1 / 16.5 of the component length.

[0046] b. Form a fiber model for loading solution

[0047] See attached figure 1 , determine the distribution of fibers 11 on the fiber cross-section 10, use an e...

Embodiment 2

[0049] A steel column Z with a cross-section of 800×500×28×28 and a material strength of Q345 1 As an example, γ=1.22 is calculated according to the section parameters; E=2.06×105N / mm is obtained according to the material type 2 , f y =345MPa; material limit plastic strain ε u Take 2.5%; refer to FEMA-356 (Table 5-6) to determine the plastic rotation angle a when the member reaches the ultimate strength C is 4θ y , that is μ a for 4. According to the type of the member and the symmetry of the section, the formula (IV) is used to calculate the column n =19.3, that is, the length of the plastic corner section 2 is 1 / 19.3 of the component length.

[0050] b. Form a fiber model for loading solution

[0051] Carry out the loading solution in the same way as in step b of Example 1, so that the failure of the component in the numerical simulation during the dynamic response process meets both the deformation limit of the FEMA component and the strain limit of the material, and ...

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Abstract

The invention discloses a processing method of a steel structure fiber model, characterized in that the processing method comprises the following steps of: calculating the ratio of the length of the component to the length of the shaping corner segment n and carrying out loading solution on the formed fiber model, the failure of components in the dynamic response process of numerical simulation can meet the deformation limit and material strain limit of FEMA components, and the damage degree of remaining structural components can be evaluated according to the performance evaluation index of FEMA standards. Compared with the prior art, the present invention has the advantages of simple analysis process and high working efficiency, and in particular provides favorable basis and reference fordamage and destruction of important components.

Description

technical field [0001] The invention relates to the technical field of building structure safety design, in particular to a steel structure fiber model processing method based on FEMA standards. Background technique [0002] When designing engineering structures, it is often necessary to judge the safety of the overall structure under earthquake and accidental loads through dynamic elastic-plastic analysis, and the failure and damage of components is often considered. At present, the commonly used finite element models for elastic-plastic analysis include the plastic hinge model and the fiber model, among which the plastic hinge model is a relatively macroscopic model, which gives the performance state of the component with the force-deformation relationship, and is often used in Sap2000, Midas / Gen and other software; the fiber model is a relatively microscopic model, which divides the section into several fibers, and describes the performance state of the component through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q50/08
CPCG06Q50/08G06F30/17G06F30/13G06F30/23Y02T90/00
Inventor 蒋瓅瞿革倪建公李庆武肖炳辉
Owner ZHONGCHUAN NO 9 DESIGN & RES INST
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