The Influence of Soil-Structure Interaction (SSI) on the Dynamic Response of SDOF Structure: A Parametric Study Utilizing Opensees
| Student | Arif Hermawan |
|---|---|
| Supervisor(s) | Prof. Dr. Ir. Masyhur Irsyam, M.S.E. & Dayu Apoji, S.T., M.T., M.Sc., Ph.D. |
| Year | 2025 |
Brief Abstract
Background
Indonesia, as a country with high seismic vulnerability, demands an accurate understanding of structural response to ensure infrastructure safety.
Objective
This study aims to quantitatively analyze the effect of SSI on the dynamic response of structures, specifically focusing on base shear and lateral displacement.
Methodology
A parametric study was conducted through 108 finite element method simulations using OpenSees, varying parameters such as the structure's natural period, soil stiffness (shear wave velocity), and pile length to compare against fixed-base models.
Key Contribution
The analysis shows that SSI consistently extends the natural period and reduces base shear (up to 92% in soft soil), though it significantly amplifies total displacement.This indicates that while conventional designs are conservative for shear forces, special attention is required regarding increased displacement and potential resonance