The effects of impedance and shape-ratio of large basin on the nature of occurrence of 2D resonance, spectral amplifications, sub-basin-induced Love (SBIL)-waves and sub-basin-transduced Love (SBTL)-waves and associated differential ground motion (DGM) across the sub-basin of the basin-sub-basin models are documented in this paper. The analysis of SH-wave responses of the considered small basin, large basin, and various basin-sub-basin models reveals that the presence of large basin does not change the occurrence of 2D resonance phenomenon in the sub-basin. But, the presence of large basin reduces the fundamental frequency (\( {F}_{02D}^{SLB}\Big) \) of sub-basin and increases the spectral amplifications and amplitude of the SBIL-wave in the sub-basin. The cause of reduction of \( {F}_{02D}^{SLB} \) of sub-basin is the decrease of the lowest fundamental mode of vibration of basin-sub-basin model in the vertical direction. A considerable effect of location of sub-basin, impedance, and shape-ratio of the large basin on the amplitudes of both the SBIL- and SBTL-waves is observed. The amplification of SBTL-wave in the sub-basin is due to the drop of impedance and the decrease of wavelength of SBTL-wave in the vertical direction. A decrease of DGM with an increase of span and decrease of shape-ratio of the large basin is obtained. The obtained largest DGM of the order of 1.85 × 10⁻³ near the edge of sub-basin for 1 cm/s particle velocity at basement level calls for further study on the complex basin and sub-basin interaction effects on the ground motion characteristics for earthquake engineering purposes.

中文翻译：

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盆地-子盆地模型中大盆地的几何特征和流变参数对子盆地SH波响应的影响

大盆地的阻抗和形状比对2D共振，频谱放大，次盆地感应Love（SBIL）波和次盆地感应Love（SBTL）波以及相关差分地面的发生性质的影响本文记录了盆地-盆地模型中整个盆地的运动（DGM）。对所考虑的小盆地，大盆地和各种盆地-次盆地模型的SH波响应的分析表明，大盆地的存在并不会改变次盆地中二维共振现象的发生。但是，大盆地的存在降低了子盆地的基本频率（\（{F} _ {02D} ^ {SLB} \ Big）\），并增加了子盆地中SBIL波的频谱放大和幅度。盆地。减少的原因子盆地\（{F} _ {02D} ^ {SLB} \）是盆地-子盆地模型在垂直方向上最低振动基本模式的减小。观察到大盆地的子盆地位置，阻抗和形状比对SBIL和SBTL波振幅都有很大影响。子盆地中SBTL波的放大是由于阻抗的降低和SBTL波在垂直方向上波长的减小所致。随着大跨度的增加，DGM的减小而大盆地的形状比减小。获得的最大DGM约为1.85×10 ^-3 为了达到地震工程的目的，在地下室边缘附近以1 cm / s的速度在地下室水平上进行粒子速度研究需要进一步研究复杂的盆地和地下室相互作用对地震动特征的影响。