摘要
基于有限元程序ANSYS 10.0,在考虑几何非线性和材料非线性的情况下,对无铰抛物线拱进行了弹塑性全过程的屈曲分析。将拱结构初始缺陷和矢跨比作为主要影响因素,分析其对无铰抛物线拱失稳极限承载力的影响。计算结果表明:无铰抛物线拱初始缺陷越大,失稳极限承载力越小;随着矢跨比的增大,无铰抛物线拱失稳极限承栽力先增大后减小,存在一个理论上的最优矢跨比。
Based on the finite element program ANSYS 10. 0, considering the factors of geometrical nonlinearity and material nonlinearity, the whole elastic-plastic buckling process of hingeless parabolic arch were analyzed. The influence of the initial defects and rise-span ratio of arch structure, which are major factors on ultimate bearing capacity were analyzed. The calculation results showed that the greater the initial defects were, the smaller the ultimate bearing capacity will be ; With the increase of rise-span ratio, the limit bearing capacity of hingeless parabolic arch buckling first increased then decreased, with an optimal rise-span ratio in theroy.
出处
《四川理工学院学报（自然科学版）》
CAS
2014年第1期77-80,共4页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
基金
中央高校基本科研业务费专项资金资助(CHD2009JC166)
关键词
无铰抛物线拱
几何非线性
材料非线性
屈曲分析
失稳极限承载力
hingeless parabolic arch
geometrical nonlinearity
material nonlinearity
buckling analysis
ultimate bear- ing capacity of instability
