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首页> 外文期刊>Bulletin of the Seismological Society of America >Transient and Permanent Rotations in a Shear Layer Excited by Strong Earthquake Pulses
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Transient and Permanent Rotations in a Shear Layer Excited by Strong Earthquake Pulses

机译：强烈地震脉冲激发的剪切层中的瞬时和永久旋转

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摘要

Nonlinear waves in a bilinear soil layer are described for excitation by vertically arriving S-wave pulses of strong ground motion. Conditions that lead to the nonlinear deformation are described in terms of amplitudes and wavelengths of incident pulses. It is shown that the layer can fail during the first passage of the incident wave (during a time shorter than the travel time through the layer). Peak amplitudes of (1) transient rotations, of (2) permanent rotations (strains), and of (3) the peak ductility in the layer are described in terms of the dimensionless amplitudes of incident pulses and the places of their occurrence in the layer. Even a simple model like this (one-dimensional propagation, simple shape of incident pulse, bilinear stress-strain soil model) leads to very complicated response. The results presented offer only a glimpse at the complexity in a realistic setting.
机译：描述了在双线性土层中的非线性波通过垂直到达的强地面运动的S波脉冲来激发。导致非线性变形的条件是根据入射脉冲的幅度和波长来描述的。结果表明，在入射波的第一次通过期间（在比通过层的传播时间短的时间内），层可能会失效。根据入射脉冲的无量纲振幅及其在层中发生的位置来描述（1）瞬态旋转，（2）永久旋转（应变）和（3）层中的峰值延展性的峰值幅度。甚至像这样的简单模型（一维传播，简单的入射脉冲形状，双线性应力-应变土壤模型）也会导致非常复杂的响应。给出的结果仅提供了现实环境中的复杂性的一瞥。

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