Method for modeling multi-scale finite element model of node of steel framework structure

Abstract

The invention discloses a method for modeling a multi-scale finite element model of a node of a steel framework structure, and the method comprises the following steps of: 1) adopting an one-dimensional beam unit to establish a steel framework structure calculating model by a finite element analysis software, selecting a key beam column node, and intercepting a beam unit which is jointed on the key beam column node; 2) connecting the beam unit with a plate shell unit through coupling six-directional freedom degrees of all nodes in a contact surface; and 3) adopting free mesh division of the finite element software; controlling quality of meshes by a mesh quantity, a side length and a curvature; setting mesh size as (5-10)mm depending on size of a plate; applying a load on a two-dimensional plate unit in a form of a node concentrative load, thereby obtaining a multi-scale finite element model of the node of the steel framework structure. The method not only ensures calculating precision, but also reduces a calculating expense to the greatest extent.

Description

technical field [0001] The invention relates to a multi-scale finite element analysis method for steel frame structure nodes, in particular to a steel frame structure node finite element model modeling method. Background technique [0002] At present, the joint bearing capacity analysis of steel frame structures usually intercepts the rods connected to the joints, and introduces the displacement boundary and force boundary. The plates are simulated by two-dimensional plate and shell elements. It is difficult to accurately determine its boundary conditions, and multi-scale finite element model modeling analysis can effectively solve this problem. Contents of the invention [0003] In order to overcome the shortcomings of the existing finite element model modeling methods for steel frame structure nodes that cannot take into account both calculation accuracy and calculation cost, the present invention provides a steel frame structure node multi-scale finite element model tha...

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Problems solved by technology

[0003] In order to overcome the shortcomings of the existing finite element model modeling methods for steel frame structure nodes that cannot take into account both calculation accuracy and calculation cost, the present invention provides a multi-scale finite element model for steel frame structure nodes that can not only ensure calculation accuracy but also minimize calculation cost metamodel modeling approach

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