（郑州大学土木工程学院， 郑州 450001）

［摘要］采用正交分解方法，可完备地将平面有限元综合变形分析结果分解为三个基本刚体位移和五个基本弹性变形（包括竖向弯曲变形），并可将其中的竖向弯曲变形分量用于钢构件稳定性分析和实时监控。通过与现有方法进行对比分析，证实了该方法的有效性以及工程可行性。

［关键词］正交分解； 竖向弯曲变形； 平面钢构件； 稳定性； 实时监控

中图分类号：TU391文献标识码：A文章编号：1002-848X(2017)02-0039-04

Stability analysis and monitoring strategy of plane steel member based on deformation decomposition

Wang Dongwei, Sun Panxu, Chen Na

(School of Civil Engineering, Zhengzhou University, Zhengzhou 450001,  China)

Abstract:The orthogonal decomposition method was used to analyze integrated deformations of plane finite element. The integrated deformations could be completely decomposed into three basic rigid body displacements and five basic elastic deformations. The vertical flexural deformation is one of basic elastic deformations. And the vertical flexural deformation component could be directly applied to the stability analysis and real-time monitoring of the steel members. Compared with existing analysis methods, the validity and engineering practicability of the method were confirmed.

Keywords:orthogonal decomposition; vertical flexural deformation; plane steel member; stability; real-time monitoring

*国家自然科学基金项目资助(50978232)。

作者简介：王东炜，博士，教授，Email：dongweiwang@zzu.edu.cn。