The calculating results show the action of braces advances the frequency and shear stiffness of the structure, and the frequency would increase monotonously with adding of brace section.

• 根据动力特征方程计算了结构固有频率值，结果表明，增大支撑截面对提高结构的固有频率即抗侧刚度有明显作用，且随支撑截面尺寸增大，固有频率单调增加；