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Seismic displacement-based design of embedded retaining structures

机译：基于地震位移的嵌入式挡土结构设计

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摘要

The paper presents an application of the seismic design method named "Direct Displacement Based Design" (DDBD), first introduced in 1990s in the field of earthquake structural engineering, and gaining due attention in the recent years. The method can be applied to a wide range of structural types, including geotechnical structures. The fundamental philosophy behind DDBD is that structures should be designed to achieve a specified performance level under a certain seismic intensity. In the paper, DDBD is described with considerable discussion on its applicability to flexible earth retaining structures in coarse grained-soils. Particular attention is given to the evaluation of the equivalent damping ratio of the wall/soil system, since it sensibly affects the results of the procedure. A simplification of the design process is proposed in order to provide a seismic demand curve, in terms of active/passive thrust, which is dependent on the system ductility. A numerical example of application of the method is provided in the paper.
机译：本文介绍了一种名为“基于直接位移的设计”（DDBD）的抗震设计方法的应用，该方法于1990年代首次引入地震结构工程领域，并在近年来引起了人们的关注。该方法可以应用于多种结构类型，包括岩土结构。 DDBD背后的基本原理是，应将结构设计为在一定地震强度下达到规定的性能水平。在本文中，对DDBD的适用性进行了广泛的讨论，描述了DDBD在粗糙粒状土壤中的柔性挡土结构的适用性。特别要注意墙/土系统等效阻尼比的评估，因为它会明显影响该过程的结果。为了提供根据主动/被动推力的地震需求曲线，建议简化设计过程，该曲线取决于系统的延性。本文提供了该方法应用的数值示例。

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