Abstract
The amount of potential investment in Padang City, Indonesia since 2017 attracted many investors to contribute to the city. One of the investments is a 12-story hotel that will be constructed in By Pass Street of the city. The hotel is located in a high seismic zone area, so the seismic base isolation has been proposed to be used in the hotel building. The main aim of using a seismic base isolation device is to reduce the inertia forces introduced in the structure due to earthquakes by shifting the fundamental period of the structure out of dangerous resonance range and concentration of the deformation demand at the isolation system. An analytical study on the Reinforced Concrete (RC) hotel building with and without rubber bearing (RB) base isolation is carried out using the response spectrum and time history analysis methods. The results show that internal forces and inter-story drift of the building with high damping rubber bearing (HDRB) are lower than that of the fixed base with a remarkable margin. From this study, it is recommended to use the HDRB base isolation for medium and high rise buildings with soft soil in Padang City, Indonesia.
Highlights
The big amount of potential investment in Padang City, the capital city of West Sumatra, made the city win an investment-worthy city award in the Indonesia Attractiveness Award in 2017
As a consequence of the high tourism possibility and hotel occupancy rates in Padang City, an increase of 11.44 points from 52.36% in February 2016 to 64.04% in March 2017, caused a lot of new hotels were constructed in Padang City in last two years
One of the oncoming hotels is Melia International (MI) hotel that was planned to build a five-star hotel located at km. 16 of by-pass road area, targeted tourists and cross-province road users
Summary
The big amount of potential investment in Padang City, the capital city of West Sumatra, made the city win an investment-worthy city award in the Indonesia Attractiveness Award in 2017. The land of this area is categorized as soft soil (SE) which has the potential for magnification of earthquake waves [1, 2]. This is not tolerable for buildings whose contents are more costly and valuable than the buildings themselves. The fixed base structure without seismic isolation is subjected to substantial story drifts, which may lead to damage or even collapse of the building [6, 7]. The analysis results in terms of structural elements internal forces, story displacement, and inter-story drift were obtained from spectrum response and time history analysis for both fixed base and base-isolated buildings. It was of interest to check the difference between the responses of a fixed-base building frame and the isolated-base building frame under seismic loading
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