Field measurements for identification of modal parameters for high-rise buildings under construction or in use

Abstract

The enhanced frequency domain decomposition (EFDD) method can yield different results with respect to modal parameters depending on the measurement and analysis conditions of the target building. Consequently, field measurement guidelines for EFDD are required. In this paper, a practical field measurement technique is proposed for the identification of modal parameters of high-rise buildings in use or under construction. Based on the modal analysis of the numerical analysis model and structural response from two high-rise buildings, the criterion for the lower bound and upper bound of the three measurement and analysis conditions from the modal analysis process were suggested as the minimum conditions for an enhanced frequency domain decomposition (MCEFDD) method. It was verified with structural responses from a 35-story building that the proposed MCEFDD method yields reliable model parameter results. The proposed MCEFDD method can be used for practical measurements of responses high-rise buildings in field.