【摘要】 Ayaho Miyamoto推导双折线体外预应力简支梁固有频率、熊学玉等对其给出的公式进行修正和扩充,但其公式仅适用于简支梁。以两跨单(双)折线体外预应力梁为例,采用整体分析和拉普拉斯变换方法,研究体外预应力连续梁的横向振动,推导出了频率方程和振型函数的解析表达式,推导过程适用于各种跨度的连续梁固有频率的计算。实测结果与公式计算误差为-2.8%,吻合较好,有利于指导实际工程。更多还原

【Abstract】 The formula of natural frequency of double broken line externally prestressed concrete beam has been derived by Ayaho Miyamoto and improved and extended by Xiong Xue-yu,et al,but the formula can only be applied to simply supported beam.Taking a two-spans single(double) broken line externally prestressed concrete beam as example,the transverse vibration of externally prestressed concrete beam was investigated by using the method of overall analysis and Laplace transform.The frequency equation and analytical expression of mode shape functions were deduced.The error between measured and calculated results is-2.8%.更多还原