预应力混凝土梁自振频率的疲劳演变

杜永潇,卫军,孙晓立

Fatigue evolution of natural frequency for prestressed concrete beam

Yong-xiao DU,Jun WEI,Xiao-li SUN

图 5 3类梁前3阶频率退化曲线的对比

Fig.5 Frequency degradation curves comparison of first three order frequencies for three types of beams