截面削弱对轴心受压墙或柱稳定性的影响研究
Study on the Influence of Section Weakening on the Stability of Axial Compression Wall or Column
汪冬生1
作者信息
- 1. 南京南大工程检测有限公司,江苏南京 210002
- 折叠
摘要
为了解截面削弱与墙或柱危险点的关系,文章对不同位置受到不同程度截面削弱情况的轴心受压墙或柱的稳定性进行了研究.首先利用能量原理,推导在不同边界条件、轴心受压和小变形情况下,沿竖向受到不同位置、不同程度全截面削弱的墙或柱临界压力和稳定系数的近似计算公式,接着讨论了其相互关系,并提出了墙或柱稳定性加固的最优位置.通过与有限元软件计算结果的对比,探讨了近似公式的精度问题.在此基础上,运用等刚度代换法,提出了截面削弱在墙或柱不同水平位置所对应的稳定系数计算方法,并通过算例演示了其在工程中的应用.
Abstract
In order to understand the relationship between the weakening of cross section and the dangerous points of walls or columns,the stability of axially compressed walls or columns with different degrees of weakening of cross sections at different positions is studied in this paper.Firstly,based on the energy principle,the approximate formulas for calculating the critical pressure and stability coefficient of walls or columns weakened by different positions and different degrees of full section along the vertical direction under different boundary conditions,axial compression and small deformation are deduced.Then the relationship is discussed,and the optimal position of wall or column stability reinforcement is put forward.By comparing the calculation results with the finite element software,the accuracy of the approximate formula is discussed.On this basis,by using the equal stiffness substitution method,the calculation method of the stability coefficient corresponding to the weakening of the cross section at different horizontal positions on the wall or column is put forward,and its application in engineering is demonstrated by an example.
关键词
墙(柱)身截面削弱/临界压力/稳定系数/近似公式/稳定性加固Key words
weakening of wall(column)cross section/critical pressure/stability coefficient/approximate formula/stability reinforcement引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据