Then the proportion of the modulation of moment taken by the second moment in the total modulation in prestressed frame is less than that in prestressed beam 同时，次弯矩调幅占总调幅的比重在框架中要远小于连续梁。因此，次弯矩协助调幅的作用在框架中也弱于在连续梁中。
2.
( 3 ) the relative height compressive zone of section greatly influences the redistribution of internal force of the prestressed frames . the total modulation of moment decreases according as the increase of relative height compressive zone of section 随着中支座截面相对受压区高度的增大，次弯矩增大，次弯矩调幅增大，但荷载弯矩调幅以更大的幅度下降，导致总的弯矩调幅下降。
