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Soil―structure interaction in yielding systems

机译：产量系统中土壤与结构的相互作用

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摘要

The effects of soil―structure interaction in yielding systems are evaluated, including both kinematic and inertial interaction. The concepts developed previously for interacting elastic systems are extended to include the non-linear behavior of the structure. A simple soil―Structure system representative of code-designed buildings is investigated. The replacement oscillator approach used in practice to account for the elastic interaction effects is adjusted to consider the inelastic interaction effects. This is done by means of a non-linear replacement oscillator defined by an effective ductility together with the known effective period and damping of the system for the elastic condition. To demonstrate the efficiency of this simplified approach, extensive numerical evaluations are conducted for elastoplastic structures with embedded foundation in a soil layer over elastic bedrock, excited by vertically propagating shear waves. Both strength and displacement demands are computed with and without regard to the effect of foundation flexibility, taking as control motion the great 1985 Michoacan earthquake recorded at a site representative of the soft zone in Mexico City. Results are properly interpreted to show the relative effects of interaction for elastic and yielding systems. Finally, it is demonstrated how to implement this information in the context of code design of buildings.
机译：评估了土壤-结构相互作用在屈服系统中的影响，包括运动学和惯性相互作用。先前为相互作用的弹性系统开发的概念已扩展为包括结构的非线性行为。研究了代表代码设计建筑物的简单土-结构系统。实际中用于解释弹性相互作用效应的替代振荡器方法经过调整，可以考虑非弹性相互作用效应。这是通过非线性替换振荡器完成的，该非线性替换振荡器由有效延展性以及已知的有效周期和系统在弹性条件下的阻尼共同定义。为了证明这种简化方法的有效性，对在垂直传播的剪切波激励下的弹性基岩上的土层中埋有基础的弹塑性结构进行了广泛的数值评估。在考虑和不考虑基础柔韧性影响的情况下，都计算了强度和位移需求，将1985年米却肯大地震记录在控制运动中，该地震记录在墨西哥城软区的一处地点。正确解释结果以显示弹性和屈服系统相互作用的相对影响。最后，演示了如何在建筑物的代码设计环境中实现此信息。

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