Dynamic Response for Coupled Horizontal and Rocking Vibrations of Embedded Foundation and Layered Soil System

• Main Authors: Yu-Ren Pan, 潘昱仁
• Other Authors: Shi-Shuenn Chen
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/pj68mg

碩士 === 國立臺灣科技大學 === 營建工程系 === 106 === The soil-structure interaction (SSI) is an important factor of the earthquake resistant design. In general, the SSI analysis is based on the assumption of idealized homogeneous soil, but the actual soil is mostly inhomogeneous. Therefore, the main purpose of this study is to analyze the dynamic forced response of embedded square foundations in two-layered soil while the coupled horizontal and rocking vibrations are considered. In this study, the simplified system simulates the layered soil using a three-degree-of-freedom model with eight equivalent parameters and compared with the actual foundation-soil system to investigate its applicability.The result shows that,for the surface foundation, when the shear-wave velocity ratio of the layered soil is 0.8, the applicability of the simplified system is not affected by the height of the foundation and the depth of the upper soil layer.For the embedded foundation, according to the relationship between the embedment depth and the depth of the upper soil layer, the embedded foundation is divided into three cases for further investigations in this study. When the embedment depth is lower than the depth of the upper soil layer and the shear-wave velocity ratio of the layered soil is 0.3, the simplified system cannot accurately simulate the actual foundation-soil system. When the embedment depth is equal to or higher than the depth of the upper soil layer, the applicability of the simplified system is not affected by the shear-wave velocity ratio of the layered soil.