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采用横观各向同性 (以下简称TI)层状弹性体模拟半空间之上的场地土 .首先推导了在入射SH波时TI弹性体界面上透射角的计算公式 ,然后利用笔者推得的在入射平面SH简谐波时TI弹性土层的刚度矩阵及TI层状场地的响应计算公式 ,计算了典型TI层状场地在SH简谐波入射时的频响函数 .计算表明 ,在入射角度较小时 ,场地的横、竖向模量比越大 ,则共振频率越低 ,而共振幅值越高 .这一规律对研究TI场地中结构的响应及场地的响应有重要的参考价值
A transversely isotropic (TI) layered elastomer was used to simulate the site soil over a half space. The formula for calculating the transmission angle at the interface of the TI elastic body at the time of the incident SH wave was first deduced, and then the author used the following formula: The frequency response function of a typical TI layered site when an SH harmonic wave is incident is calculated by using the stiffness matrix of the TI elastic soil and the response formula of the TI layered site when the plane SH harmonic wave is incident. The calculations show that the incident angle Hours, the greater the horizontal and vertical modulus ratio of the site, the lower the resonance frequency, and the higher the common amplitude value. This law has important reference value for studying the response of the structure in the TI site and the response of the site.