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 1 二次抛物线型布筋无黏结PC简支梁的计算简图

Fig.1 Calculation diagram of unbonded PC simply supported beam with quadratic parabolic reinforcement