PARAMETRIC STUDY OF RAIL-STRUCTURE INTERACTION ON BALLASTLESS TRACK HIGHSPEED RAILWAY BRIDGE

• Main Author: Abdul Ghani, Dwiqhee
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/76416
• Institution: Institut Teknologi Bandung

Highspeed train technology in Indonesia is currently in a fairly rapid development process. This can be seen from the construction of the joint highspeed railway project between Indonesia and China (KCIC) which can facilitate travel from Jakarta to Bandung and vice versa. According to Magued (1987), longitudinal movement of the structure that supports the continuous welded rail (CWR) induce an interaction between the structure and the rail. The movement of the structure supporting the CWR will cause an axial force on the rail, this interaction is also known as the rail - structure interaction (RSI). This thesis aims to examine the effect of design parameters (bridge span length, number of bridge spans, stiffness of ballastless, and pillar height) on structural deformation and total additional stress on the rails using RSI analysis. The research method used is finite element analysis with varying parameters of the number of spans used are 1, 3 and 5 spans, span lengths of 24 m, 32 m, and 40 m, pillar heights of 15 m and 20 m, as well as ballastless stiffness values suggested by UIC and Zhang (2018) for CRTS III ballastless tracks. The structural model that has been made is then loaded by the temperature load of the bridge, the traction/braking force, and the vertical load of the highspeed train according to the rules suggested by Eurocode and UIC 774-3R. Based on the results of the analysis carried out, the span length parameter of the bridge produces a total additional stress on the rail with an increase range of 10% - 47%. The parameter of the number of spans increases the total additional rail stress on the rail by 13% - 80%, the ballastless stiffness parameter is 3% - 7%, and the pillar height parameter is 1% - 3.5%. The total additional stress on the rails tends to be affected by the traction load because the longer and more bridge spans, the greater the load acting on the rails and bridges, while less is distributed to the embankment area.