Kinerja Isolator Bola-Pegas pada Model Struktur Fleksibel Skala Kecil
rasio reduksi percepatan (am-as)/am, mencapai 39% pada level atas dan 45% pada level bawah, sedangkan pada percepatan landasan lebih dari 0.2g, rasio reduksi percepatan tersebut mencapai lebih dari 80% pada kedua level.
Abstract. The collapse of buildings due to the earthquake is still an issue that needs to be solved. This research studied the performance of the ball-spring seismic isolator on a reduced scale, single-story, flexible structure model. Model’s mass on each top and bottom level is 30 kgs. Ball isolator is mounted between the structure model and vibrating base. A spring constant support of 500N/m is installed to restore the model to its original position after the vibration. One end of the spring is tied to each bottom corner of the model and the other end is tied to the vibrating
base. The column of the model with the spring constant of 22,117 N/m, are clamped at the lower and upper ends. Sinusoidal vibrations were applied on vibrating base with the frequencies of 10.6, 15.35 and 20.44 rad/s and the amplitudes of 5, 10, 15 and 20 mm. The results show that the model acceleration response rates (as) increase linearly to increasing the base acceleration rates (am), while the ratio of the acceleration responses model to the base acceleration (as/am) decreases with an increasing the base accelerations. Ball-spring isolators very effectively reduces acceleration especially at the level of high rates of the base acceleration. At the level of the lower base acceleration (0.05g), acceleration reduction ratios, (am - as)/am, reach 39% at the top level and 45% at the bottom level, while the base acceleration of more than 0.2g the acceleration reduction ratios reach more than 80% at the both level.
Bontong, B., Mallisa, H., Sollu, T.S., 2012, Sistem Isolasi Seismik Bola-pegas pada Model Rumah Skala Kecil, Laporan Penelitian Hibah Bersaing Tahun ke-II, Lemlit Untad Palu.
Bontong, B., Mallisa, H., Sollu, T.S., 2010, Karakteristik Dinamik Bola Baja sebagai Material Isolasi Seismik, Jurnal Teknik Sipil ITB Vol. 17 No. 1, hal 39-46.
Clough, R.W., and Penzien, J., 1975, Dynamics of Structures, McGraw-Hill, Inc.
Kajima, T., Ito, A., and Fujita, H., 2004, Earthquake record of 2003 Off Kushiro Earthquake at Kushiro-government office, Mensin Journal, N0.43, pp. 36-38.
Saito, T., et. al. 2005, Response Control and Seismic Isolation of Buildings, London: SPON Press.
Sakai, S., Ito, Y., and Iida, T., 2004, Earthquake response of base isolation hospital, Mensin Journal, N0.43, pp. 41-43.
Takenaka, Y., Yasuda, T., and Suzuki, Y., 2004, Earthquake observation of base isolation building in Kushiro city at 2003 Off Kushiro Earthquake, Mensin Journal, N0.43, pp. 31-35.
Todo, M., and Seki, H., 2004, Earthquake record of 2003 Off Kushiro Earthquake at Kushiro-bank headquarter, Mensin Journal, N0.43, pp. 39-40.
Tuma, J.J, and Cheng, F.Y., 1983, Dynamic Structural Analysis, McGraw-Hill Book Company.
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License