System Identification and Damage Assessment of Benchmark Model H

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Title:	System Identification and Damage Assessment of Benchmark Model H
Authors:	Wang, G. S.;Lo, C. W.;Huang, F. K.
Date:	2023-07-02
Issue Date:	2025-03-20 12:12:12 (UTC+8)
Abstract:	Most of the existing buildings available for damage assessment are slightly or severely damaged, and these data may not be sufficient to establish damage indicators. To solve this problem, the experimental method is used to simulate different damage states, followed by identifying the parameters of the associated damaged structure. Consequently, damage indices that describe the degree of damage can be computed using the identified parameters, and then the threshold values of different damage states can be reached afterward. In this paper, the system identification method, called the hybrid genetic algorithm, is used to analyze the measurement from the shaking table test of a series of 3-story steel frame structures, called the benchmark model H constructed in the NCREE. This series of tests tries to simulate different damage states. In fact, structural models are a series of structures simulating various damage states by varying the numbers of diagonal bracings on both sides of x direction. The dimension of the structure is 3m in the longitudinal direction and 2m in the transverse direction. The shaking table test is carried out in the sequence from Full Bracing (FB) in the x direction to the bare frame. From Case1 to Case3, the vertical diagonal bracings of the outer side are removed one by one from the first floor to the third floor in the x direction. In this way, eccentric structures with varying degrees of damage can be simulated. Finally, all diagonal bracings in the x direction are removed, leading to a Bare Frame (BF). With the change in the dynamic parameters of the elastic system under earthquake, the damage assessment method is applied to determine the degree of damage and the location or floor of damage.
Appears in Collections:	[Graduate Institute & Department of Water Resources and Environmental Engineering] Proceeding

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