The optimization of the radius of openings and the gap between openings is performed based on a modified eigen buckling load, which corresponds to arch efficiency.
通过选用一种代表开洞拱效率的特征值屈曲荷载参数，研究了腹板孔洞的半径和间距的优化尺寸。
2
The effects of geometrical imperfections, unuhiform loads and support settlements on the in-plane bucklingof circular arch are investigated.
研究了几何缺陷、荷载非均匀分布和支座沉陷对圆弧拱面内屈曲的影响。
3
For a secondary bifurcation buckling load, the limit load carried capacity of the arch of 0.1 rise-span ratio is the biggest one under a full span load distribution.