Soil-pile-structure interaction under nonlinearity in soil and developement of method for dynamic response of structural systems

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420454
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Saitama University
• Principal Investigator: SAITOH Masato 埼玉大学, 理工学研究科, 教授 (40334156)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 動的相互作用 / 非線形 / 杭基礎 / 模型実験 / インピーダンス / 有効入力地震動

Outline of Final Research Achievements

This study deals with the mechanism of soil-pile-superstructure interaction subjected to strong ground motions by conducting shaking table tests and analytical approaches. In this study, shaking table tests were conducted first for evaluating the total response of structural systems. Then, an analytical model consisting of one-degree-of-freedom system supported by a sway model was developed. To clarify the mechanism of discrepancies between the test results and analytical results, specific table tests were performed. In the tests, base input and pile-head loading were simultaneously applied to the experimental models. The test results indicate that a new mechanism of soil-pile interaction is generated when nonlinearity in soils and interface nonlinearity occurs: kinematic interaction and inertial interaction are interrelated with each other due to inseparable nonlinear behavior in the system.

Free Research Field

地震工学