摘要
在Rayleigh能量法和Southwell频率合成法的基础上导出了双柱式桥墩复合振动基频的近似计算公式。将基频表示成各惯性元子系统和复原元子系统频率的合成。然后建立有限元模型验证了该公式的正确性。该公式计算简单、精度高,适用于各种基础类型的双柱式桥墩基频的估算,也适用于基础约束刚度的识别和桥墩施工质量控制评估。
A calculation formula of compound fundamental frequency's approximate calculation of double- column piers is developed based on the combjnation of Rayleigh and Southwell's methods. The fundamental frequency is denoted as composition of inertia component system and regressing component system. Then Finite Element Analysis is used to established models to verify the present approach. The calculation formula presented in this paper is simple in calculation, high in precision, and adaptable to calculate fundamental frequency of double-column piers with different kinds of foundation and identity. It can also be used to identify the foundation restraint stiffness of double-column piers and evaluate construction quality of double-column piers.
出处
《山东交通学院学报》
CAS
2008年第3期45-49,共5页
Journal of Shandong Jiaotong University
关键词
双柱墩
复合基频
频率合成法
double-column pier
compound fundamental frequency
frequency composition method