计算结论表明：通过优化和改进后的拱脚刚结点局部应力分布机制更趋于合理。
The results show that the stress distribution mechanism of rigid joint of arch foot improved by various measures is more reasonable than before.
作为实例，构造两个可以给出单刚显式的四结点平面非协调新单元。
Two plane 4-node incompatible elements which can possess explicit element stiffness matrix are constructed as the examples.
作为实例，构造两个可以给出单刚显式的四结点平面非协调新单元。
Two plane 4-node incompatible elements which can possess explicit element stiffness matrix are constructed as the examples.
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