The analysis of section relative displacement in antisymmetric statically indeterminate frame without external restrctions
无约束反对称静不定刚架截面相对位移的解法

On the basis of the principle of virtual work, the building of unit-load state, when solving section relative displacement in antisymmetric statically indeterminate frame without external restrctions, is analyzed principally. The essential of the unit-load method can be understood well by students from the analysis of this paper.