TY - JOUR ID - 2951 TI - Structural system identification of elevated steel water tank using ambient vibration test and validation of numerical model JO - Amirkabir Journal of Civil Engineering JA - CEEJ LA - en SN - 2588-297X AU - Alembagheri, Mohammad AD - Y1 - 2020 PY - 2020 VL - 51 IS - 6 SP - 1177 EP - 1186 KW - System identification KW - elevated water tank KW - ambient vibration test KW - peak picking method KW - model calibration DO - 10.22060/ceej.2018.14331.5625 N2 - The present research aims to investigate the feasibility of using ambient vibration tests for system identification of elevated water tank. To this end, the elevated water tank located in Tarbiat Modares University (TMU) campus is utilized. The tank is instrumented with a sensitive velocimeter sensor and the ambient velocity of the tank is recorded for 30 minutes in three perpendicular axes. The amplitude of the velocity signal reaches to about 30 mm/s. Using the peak picking method, the fundamental frequency of the tank is determined about 1.9 Hz. Although, considering the non-perfect symmetry of the tank and the misaligned orientation of the sensor, the obtained values in two lateral directions differ 5%. Then, the numerical model of the tank is prepared in software and calibrated. In the primary modeling, the values of natural frequencies of the tank are in good agreement with the results of the ambient vibration data. It shows the calibration of the numerical model which can be used in the assessment of the seismic behavior of the elevated water tank. UR - https://ceej.aut.ac.ir/article_2951.html L1 - https://ceej.aut.ac.ir/article_2951_740fa132ac733d21c52c5dbd1a42eacd.pdf ER -