Standard Operating Procedures for Fundamental Frequency Identification of Full-scale Steel Building Exposed to Fire

Abstract

Researchers from the Architecture and Building Research Institute (ABRI) of Taiwan and the Department of Civil Engineering of National Cheng Kung University (NCKU) built a large outdoor fire research facility at the Kuei-Jen campus of NCKU It includes a platform which is 18 meters long and 12 meters wide and a 4 meters high single-story full-scale steel building which is 12 meters long and wide There are 12 low-friction pot bearings installed between the platform and the raft foundation To investigate the behavior of steel buildings exposed to fire the full-scale steel building has gone through several fire experiments which were designed to expose the local beams or beam-column joints to fire Before and after each fire experiment forced-vibration experiments are performed In the forced-vibration experiment the MK-155U Eccentric Mass Shaker System provides external force to the full-scale steel building in different frequencies The accelerations of the isolated platform and the roof of the full-scale steel building are measured According to the theory of system identification the signals of the measurement are able to identify the fundamental frequency of the full-scale steel building This thesis depicts the experimental environment of each fire experiments as well as each forced-vibration experiments And how to deal with different signals is also explained in detail At last we set up a standard operating procedure for fundamental frequency identification of full-scale steel building exposed to fire Apply it to the experimental signals obtained by different measurement systems to verify the applicability of this process to all measurement systems

Date of Award	2019
Original language	English
Supervisor	Shih-Yu Chu (Supervisor)