System Identification of Industrial Steel Building Based on Ambient Vibration Measurements and Short Time Monitoring

Abstract

This paper presents a case study for identification of the dynamic characteristics of an industrial building with flexible steel moment resisting frame system based on ambient vibration measurements and short time monitoring. The field tests were conducted after detection of damage on non-structural separation masonry wall in the building with the intention to identify the properties of the building and detect possible sources of extreme operational conditions that lead to appearance of cracks in the walls. The accelerations, displacements and variations of temperature inside the building were monitored for 5 days via real time online monitoring system. The results revealed presence of continuous, but low level accelerations with different intensities throughout the building, significant variations of the relative displacements of the cracked wall in relation to the floor system and negligible variation of temperature.