PARAMETRIC STUDY THE EFFECTIVENESS OF LEAD RUBBER BEARING (LRB) ON THE CONCRETE CONTINUOUS SPAN BRIDGES

• Main Author: Jeremia Ginting, Theofilus
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/39698
• Institution: Institut Teknologi Bandung

Increasing the structure's performance against strong earthquakes is a concentration that needs to be developed considering the seismic impact of the earthquake produces a fairly severe degree of damage. Therefore a more effective technique can be developed and can be applied to seismic structural design, so that damage can be minimized significantly or can be avoided. This study aims to conduct a parametric study on the effectiveness of the use of lead rubber bearings that are mounted on continuous span bridges. Analysis of earthquake forces using dynamic analysis using spectra response, harmonic vibration and as a final evaluation of the performance of lead rubber bearings, will be analyzed using the time history analysis method. Lead rubber bearing (LRB), when applied to the placement of a high pillar bridge (pier), it will be different from the application on a short (pier) pillar. The difference is in the elastic stiffness it has. The parallel relationship between LRB as a bearing and pillars is equally important in holding lateral loads on the bridge structure, especially earthquake loads. Both the LRB and the pillar (pier) are actually able to provide damping energy from the rigidity they have. It is hoped that the bridge strength performance will no longer only rely on large dimensions and stiffness in the pillar in response to earthquake loads, but the use of LRB as a structure device on bridge placement can increase the effectiveness of pillar stiffness in providing damping energy during an earthquake. In this study the initial bridge design will be carried out to strengthen the hypothesis which can describe the analysis of the approach of the actual bridge structure in the field. Bridge design is depicted in a model using MIDAS CIVIL software with loading characteristics for bridges based on SNI 1725: 2016 and bridge planning for earthquake loads based on SNI 2833: 2016. The results of this study can later show that the role of lead rubber bearings is effective in reducing the displacement of structures over bridges in longitudinal and transverse directions, especially in high pillar columns.