The paper aims to extract the dynamic properties of existing structures without utilizing the analytical models. The ambient vibration testing could be used on any type of frame such as concrete, steel and masonry to investigate the structural vulnerability. The method could be the first stage and necessarily for the retrofit process. To achieve this aim, the ambient vibration testing can also be employed. The experimental data obtained from the method can be used to monitor the health, evaluating, and damage detection structures at present. The achieved data can be compared in future with the recorded signals at different times. So, the ambient vibration test was carried out on the building of Imam Hossein Hospital at Mashhad. Then, its dynamic characteristics of the acceleration records are obtained by using Data Cited by 0 documents Inform me when this document is cited in Scopus: Related documents , , (2018) Proceedings of ISMA 2018 - International Conference on Noise and Vibration Engineering and USD 2018 - International Conference on Uncertainty in Structural Dynamics , , (2019) Conference Proceedings of the Society for Experimental Mechanics Series , , (2017) Procedia Engineering Find more related documents in Scopus based on: Set citation alert ▻ Operational modal analysis and fluid-structure interaction Vigsø, M. Kabel, T. Tarpø, M. Operational modal analysis on wind turbine hub Juul, M. Balling, O. Brincker, R. On minimizing the influence of the noise tail of correlation functions in operational modal analysis Tarpø, M. Olsen, P. Amador, S. View all related documents based on references Authors ▻ Keywords ▻ Brought to you by Universidad Cooperativa de Colombia Search Sources Lists SciVal ↗ Create account Sign inAcquisition System with three accelerometers in two perpendicular coordinates. The method is more accurate and practical compare with analytical models of the existing buildings. The ambient vibration test prevents of several points such as destructive testing or may irreparable damage to the building as well as high cost. Even, the ambient vibration test maybe required for every couple of decayed, when noticed of any changes in the condition of buildings after construction. These type of changes could be quality of concrete or welding or some changes in the location of walls that can be affected the dynamic specifications of the building. The method provides real lateral load pattern and actual modes that can evaluate existing condition of the building compare with the time of construction.

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