Plastic-Zone Method of Steel Structure Considering Isotropic Plastic Damage

王连坤 1; 郝际平 1; 张俊峰 1; 王孟鸿 2

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Plastic-Zone Method of Steel Structure Considering Isotropic Plastic Damage

更新时间：2025-12-08

- Plastic-Zone Method of Steel Structure Considering Isotropic Plastic Damage
- Vol. 42, Issue 7, Pages: 885-890(2008)
- 作者机构：
  
  西安建筑科技大学土木工程学院,西安,710055
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU973
- Online First：10 July 2008，
  
  Published：2008
- 稿件说明：
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王连坤 1, 郝际平 1, 张俊峰 1, et al. Plastic-Zone Method of Steel Structure Considering Isotropic Plastic Damage[J]. 2008, 42(7): 885-890.
DOI：

王连坤 1, 郝际平 1, 张俊峰 1, et al. Plastic-Zone Method of Steel Structure Considering Isotropic Plastic Damage[J]. 2008, 42(7): 885-890. DOI：

摘要

基于更新拉格朗日构形的增量虚位移原理和三维空间薄壁构件理论

以构件拉弯、压弯、纯弯及扭转状态下平衡微分方程的解作为形函数

详细推导了考虑截面翘曲影响的空间薄壁梁柱单元的几何非线性切线刚度矩阵; 基于结构钢各向同性塑性累积损伤的本构关系

以及能反映Bauschinger效应和屈服面扩张的Zeigler混合强化模型、Von Mises屈服准则、相关流动法则

推导了考虑材料损伤和混合强化本构关系的弹塑性刚度矩阵.算例证明文中的方法可以达到较高的精度

从而为进行空间钢框架结构考虑损伤的高等分析提供了依据.

Abstract

According to the increment virtual displacement principle based on the updated Lagrange configuration and 3D space thin-walled member theory

the solutions of equilibrium equations under stretch-bending

compression-bending

pure bending and torsion

are taken as the interpolation functions

and the geometrical nonlinear stiffness matrix of space thin-walled beam-column elements considering cross-section warping effect is derived. The Von Mises yield criterion in combination with the Zeigler mixed hardening assumption which takes the Bauschinger effect and yield surface expansion into account and an association flow rule is incorporated into the material nonlinearity consideration

and the constitutive equations based on isotropic plastic accumulative damage are considered in the process. The accuracy and efficiency of the proposed analytical configuration are verified by numerical examples

and the method may provide a foundation for the advanced analysis of space steel frames considering damage.

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references

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宋振森. 刚性钢框架梁柱连接在地震作用下的累积损伤破坏机理及抗震设计对策[D]. 西安: 西安建筑科技大学土木工程学院, 2001.

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