Abstract
Seismic isolation systems are widely used in buildings, bridges, and industrial structures all over the world. The system is known for the efficiency to reduce earthquake demand and thus provide better seismic performance of the structures. In particular to application in an arch suspended-deck bridge, seismic isolation system can be a solution for the seismic resisting system due to the incapability of the cable hangers to transfer horizontal forces from excitation mass on the hanging deck to the main compression arches. Kalikuto arch bridge that is built in 2018 has implemented both Lead Rubber Bearings and Seismic Rubber Expansion Joints as the part of its seismic resisting system. These two seismic isolation devices were designed and engineered accurately to fulfil the seismic design requirements of the Kalikuto bridge. Finally, several performance tests were conducted to evaluate the design compliance of the manufactured devices.
Highlights
Indonesia is an island country known for its seismic activity
This can be seen from seismic map released by the Public Works Department, where more than 70% of the regions are indicated as moderate to high seismic zones
In the development of the seismic codes and standards, the Indonesian seismic maps are usually updated with higher seismic coefficients for most of the regions due to additional indicated number of active faults
Summary
Indonesia is an island country known for its seismic activity This can be seen from seismic map released by the Public Works Department, where more than 70% of the regions are indicated as moderate to high seismic zones. Kalikuto bridge is the part of Trans Java Toll Road which located in between two big cities in Central Java: Semarang and Batang. Semarang-Batang Toll Section, Kalikuto bridge is designed with a span configuration of 30-100-30 meters. The concrete deck is designed to serve 4 lanes traffic that connects two big cities Semarang and Batang. This 4 lanes traffic requires the bridge to have an overall 32.8 meters width of concrete deck. The structural system must provide enough strength to overcome such potential issue
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