STUDI PERBANDINGAN DESAIN BANGUNAN GEDUNG BETON TAHAN GEMPA DENGAN DAN TANPA SISTEM ISOLASI DASAR LEAD RUBBER BEARING
As an earthquake-prone area, building structures in Indonesia should be designed to be earthquake resistant. To achieve this goal, the structural elements must be able to withstand the high demand of earthquake forces. A commonly used approach is to allow inelastic behavior of structures as a form o...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/66960 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | As an earthquake-prone area, building structures in Indonesia should be designed to be earthquake resistant. To achieve this goal, the structural elements must be able to withstand the high demand of earthquake forces. A commonly used approach is to allow inelastic behavior of structures as a form of dissipation of earthquake energy. However, this approach cannot be applied to infrastructure that is crucial and must operate after being hit by major earthquakes. Another approach is needed to design this crucial infrastructure. One of them is by installing base isolation at the base of the structure. Base isolation system decouples (isolates) the upper structure from the effects of ground shaking. Displacement of the structure will be concentrated on the base isolation system located at the base of the building. As a result, the superstructure above the base isolation system will not suffer significant damage and remains elastic after a strong earthquake occurred. In addition, the modification of the response of the structure due to the base isolation system causes a change in the internal forces of the structure. Thus, there is potential for changes in dimensions of structural elements and its reinforcement.
In this study, a comparison will be made between the design of earthquake-resistant concrete frame building structures with and without base isolation system. Base isolation system used is Lead Rubber Bearing (LRB). The structure without the base isolation system will be designed with special frame detailing (SRPMK), and the structure with base isolation system will be designed with ordinary frame detailing (SRPMB). Furthermore, a comparison is carried out in terms of dynamic characteristics, internal forces of elements, and volume of structural materials. Compared to the structure without the isolation system, there is a reduction of 4% in concrete volume and an increase of 6,7% in reinforcement volume. It is assumed that the behaviour of base isolation system is linear and there is no segmentation of structural element dimensions.
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