【摘要】 建立双折线预应力钢筋混凝土等直梁的强迫振动的运动微分方程,分析了梁在预应力钢筋作用下的横向振动问题,将运动微分方程解耦,得到梁在预应力作用下自振频率的解析解,分析了梁的自振频率与预应力和偏心距的关系,通过实例计算,得到了梁在不同预应力时梁桥的自振频率曲线。更多还原

【Abstract】 The differential equations of forced vibration of the beam are established. The transversal vibration behaviors of the prestressed concrete beam are analyzed. The natural frequency and dynamic responses of the beam under prestressed force and moving load are obtained by decoupling and resolving the differential equations. The relationship between natural frequency and prestressed force or eccentricity is discussed. The analytic solution of since the frequency of vibration of the beam are obtained, and the comparison between dynamical effects whether considering the prestressed force is revealed by example.更多还原