CASE STUDY OF THE EFFECT OF SOIL STRUCTURE INTERACTION ON MARINE JETTY PERFORMANCE SUBJECTED TO CORROSION

Abstract

This study investigates the combined impact of soil-structure interaction (SSI) and corrosion on the seismic performance of marine jetty systems, focusing on two locations in Indonesia with different soil conditions: sandy soil at Probolinggo and clayey soil at Gresik. Using numerical modeling and nonlinear static pushover analysis, the study evaluates the effects of 25 years of corrosion on the lateral resistance and displacement capacity of pile-supported jetties. The analysis revealed that while the jetty on sandy soil initially exhibited higher stiffness and lateral capacity, it was more susceptible to corrosion, resulting in a significant decrease in structural performance. Conversely, the jetty on clay soil showed more gradual degradation and better long-term ductility. The findings highlight the critical role of soil type and corrosion in influencing the performance and safety of marine jetties over time. These results provide valuable insights into the design and maintenance of similar coastal infrastructure, especially in seismically active regions with corrosive marine environments.