The drift ratio of RC beams at yielding is related to the yielding strength of longitudinal bars and depth of beam cross section.

RC梁的屈服位移角与受拉钢筋屈服强度、截面高度有关；

youdao

The reduced stresses in the longitudinal bars help to achieve less critical bond condition under the cyclic loading, especially in the lack of column axial force.

降低了的梁内纵筋的应力能在反复循环荷载下获得较为有利的粘结条件，特别是在缺少柱上轴向压力的时候。

youdao