变截面刚架结构分析的等效刚度法

Equivalent Rigidity Method for the Analysis of Rigid Frame with Members of Varying Sections

用势能驻值原理导出各种截面楔形杆的等效刚度系数，用力法算出其固端弯矩修正系 数，把带有楔形柱、等截面梁的变截面刚架转换为等效等截面刚架来分析其内力、位移和计算长 度．提出的这种等效刚度法 简便、精度高．适于工程设计中应用．

In this paper, the equivalent coefficients of rigidity of tapered members have been derived by using energy method, and their equivalent coefficients of fixed-end moment have been calculated by using force method. By changing the rigid frame with tapering column and uniform beam to equivalent one with members of constant cross section. the internal force, the displasment and the effective length of column of the frame can be calculated sim- ply. In civil engineering, the equivalent rigidity method presented herewith can be used in designing.