COMPARISON OF STRUCTURAL RESPONSE AND MATERIAL COST OF CONCRETE BRIDGE WITH SEISMIC ISOLATION SYSTEM LEAD RUBBER BEARING

• Main Author: Naomi Br. Pardede, Inda
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74120
• Institution: Institut Teknologi Bandung

Indonesia's geographical location is in the Ring of Fire region which causes frequent earthquakes in Indonesia. This earthquake caused quite significant losses from both economic and social factors. Therefore, it is necessary to improve the structure's performance against earthquakes which can be supported by an innovation, namely Lead Rubber Bearing (LRB). LRB is an earthquake damper isolation system that is applied as a pier bridge placement. Analysis of the earthquake force structure using dynamic response spectrum analysis. The bridge being modeled is a bridge with a short pier. Bridge modeling was carried out using MIDAS Civil software based on SNI 1725:2016 Loading for Bridges, SNI 2833:2016 Bridge Planning Against Earthquake Loads and LRB dimensions used based on AASHTO GSID, 4th Edition, 2014. Piers can actually provide damping energy with different dimensions and burials. own. However, the use of LRB as a placeholder is expected to increase the dimensional efficiency and pier softness. The results of the study obtained that the period of the LRB bridge is greater than that of the Conventional Bearing (CB) bridge. When using the damping LRB which was originally used 5% to 17.7% resulting in a decrease in spectral response. The dimensions of the pier bridge can be reduced so that cost efficiency is obtained with a bridge using LRB, which is 22.93% cheaper than a bridge using CB.