The dissertation discusses some theories of computation including the unit stiff matrix of the spatial member in the local coordinates , the coordinate transformation , the integration of the integer stiff matrix , the equivalent joint load , the introduction of the boundary condition , the computation of the unit internal force and support reaction , the stableness of the spatial stiff frame . the dissertation also discusses the methods of dealing with several unusual problems such as combined structure , temperature stress , elastic bearing 本文論述了空間桿件局部坐標(biāo)單元剛度矩陣、坐標(biāo)轉(zhuǎn)換、整體剛度矩陣的集成、等效結(jié)點(diǎn)荷載、邊界條件的引入、單元內(nèi)力與支座反力計算、空間剛架穩(wěn)定的計算理論,以及組合結(jié)構(gòu)、溫度內(nèi)力、彈性支承等幾個特殊問題的處理方法。