摘要
本文从数值分析角度探讨了在土阻尼作用下,应力波在一维变截面、变纵波速(突变或连续变化)杆中的传播及反射.文中利用杆端入射波及反射波质点速度波形通过优化反演方法推算出阻尼系数、土刚度系数、变波阻抗发生位置、程度.此外,文中还对不同形式波阻抗变化情况下的反演结果,进行了比较、分析,并对实验桩实测波形进行了初步分析.
In this paper, the effects of continuous or sudden variation of cross-section and wave velocity on propagation and reflection of stress-wave in 1-D bar are discussed in consideration of the action of soil damping based on numerical analysis. Parameters such as the soil damping coefficient, the soil stiffness coefficient, the location and degree of occurred varying wave-impedance arc calculated by optimum method from wave-forms of incident and reflected wave particle velocity at bar top.Besides, the results of inverse calculation are compared and analysed for cases in which wave impendance varies in different forms, and the velocity wave-forms measured from model piles are initially analysed as well.
出处
《土木工程学报》
EI
CSCD
北大核心
1994年第3期41-49,共9页
China Civil Engineering Journal
