Analog circuit to simulate dynamic soil–structure interaction in shake table test

✍ Scribed by Kazuo Konagai; Toyoaki Nogami

• Book ID: 104322716
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 524 KB
• Volume: 17
• Category: Article
• ISSN: 0267-7261
• DOI: 10.1016/s0267-7261(97)00044-4

✦ Synopsis

A soil medium at the side of an embedded structure is treated as mutually uncoupled horizontal layers of a unit thickness. A plane strain condition is assumed within each individual layer such that the medium responses do not vary along the thickness. According to previous work by the authors and also a new formulation given herein, the impedance of the above layer at the structure can be produced by frequencyindependent simple mechanical models for all three modes of foundation responses. Similar frequency-independent models are also presented for the impedance at the foundation base. These models are made of two different basic elements and a mass interconnected in series. Their arrangements directly indicate the wiring of electric circuits which generate signals corresponding to the transient soil-structure interaction responses. To all intents and purposes, electric circuits do not loose time in responding to the inputs. Therefore, they allow us to simulate the soil-structure interaction response in shake table model tests, which are commonly conducted at relatively high excitation frequencies for earthquake simulation.