ANALYASIS OF BRIDGE STRUCTURE WITH SOILSTRUCTURE INTERACTION AND PUSHOVER ANALYSIS

• Main Author: A Tjiptohardojo, Christian
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/64006
• Institution: Institut Teknologi Bandung

Structural calculations often ignore the effect of the reaction of the structure on the soil and the soil on the structure. Soil-structure interaction (SSI) is one method to model the interaction between structure and soil. The SSI used in this study consists of elastic or immediate settlement, consolidation settlement, and lateral soil resistance. The structure of dock or pier should review the SSI and be analyzed for pushovers to determine the plastic hinge, performance level, and structural failure behavior against earthquakes. Structural analysis was carried out on 3 soil models, Soft, Medium, and Hard with SPT values of 1, 10, and 20. The structure of the pier has a height of 24 meters from the seabed, with sea level at a height of 16 meters. The pile foundation has diameter of 1 m and depth of 30 m. The bearing capacity of the soil is assumed to be able to withstand the working load. The results of the pushover analysis on the Soft soil model have higher drift and base shear values compared to the Medium and Hard soil models. The performance level on the Soft, Medium, Hard soil models is at the Operational level; with base shear values of 1326 kN, 1940 kN, and 2000 kN; drift at 0.022 m, 0.013 m, and 0.009 m; and performance levels at 0.092%, 0.054%, and 0.038%. From the results of the analysis, it can be concluded that the soil-structure interaction has a direct influence on the level of structure performance.