摘要
本文采用一个新的分析方法研究了冲积浅谷对平面单频Rayleigh波的稳态反应。谷地的形状是圆的,其深度对半宽的比≤1。将传入谷地以及散射的波表为Fourier-Bessel级数,本文的方法就是建立在这个基础之上。在应用应力和位移的连续条件之前,用有限的Fourier级数来近似自由场运动。研究结果表明,谷地一般放大了入射的地面运动,同时,位移的放大和复杂性决定于入射Rayleigh波的频率以及谷地的形状。
The steady-State response of shallow alluvial valleys to plane monochromatic Rayleigh waves has been Studied by a new analytical method.The shape of the valley is circular, with depth to half-width ratio≤1. The method is based on representation of the transmitted into the valley and the scattered waves in Fourier-Bessel series. Finite Fourier series have been used to approximate the free-field motion before the application of the continuity of stresses and displacements conditions. The results show that in general the valley amplifies the incident ground motion and that the amplification and the complexity of the displacement pattern depend on the frequency of the incident Rayleigh waves and on the shape of the valley.
出处
《地震工程与工程振动》
CSCD
北大核心
1990年第1期21-24,共4页
Earthquake Engineering and Engineering Dynamics
