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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Huang, Ming-ChihHas files: Yes

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Now showing 1 - 3 of 3
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    Damage Detection of Structures Identified with Deterministic-Stochastic Models Using Seismic Data
    (2014-01-01)
    Huang, Ming-Chih
    ;
    Wang, Yen-Po
    ;
    Chang, Ming-Lian
    ;
    土木工程學系
    ;
    Department of Civil Engineering
    A deterministic-stochastic subspace identification method is adopted and experimentally verified in this study to identify the equivalent single-input-multiple-output system parameters of the discrete-time state equation. The method of damage locating vector (DLV) is then considered for damage detection. A series of shaking table tests using a five-storey steel frame has been conducted. Both single and multiple damage conditions at various locations have been considered. In the system identification analysis, either full or partial observation conditions have been taken into account. It has been shown that the damaged stories can be identified from global responses of the structure to earthquakes if sufficiently observed. In addition to detecting damage(s) with respect to the intact structure, identification of new or extended damages of the as-damaged counterpart has also been studied. This study gives further insights into the scheme in terms of effectiveness, robustness, and limitation for damage localization of frame systems.
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    Development of physical-parameter identification procedure for in-situ buildings with sliding-type isolation system
    (2013-06-24)
    Huang, Ming-Chih
    ;
    Wang, Yen-Po
    ;
    Lin, Tzu-Kang
    ;
    Chen, Yi-Hsuan
    ;
    土木工程學系
    A system identification procedure is developed to identify the physical parameters of structures with seismic isolation using the friction pendulum systems (FPSs). The superstructure is assumed to be linear on account of substantial reduction of seismic forces with the installation of FPS. Hysteretic models of both Coulomb's and Mokha's friction mechanism have been considered for the FPS. Simulation results indicate that the physical parameters of the FPS and superstructure can be successfully identified by the proposed scheme. Experimental verification has been conducted further via shaking table tests using realistic earthquake scenarios. The identified parameters from seismic response data indicate that the FPSs behave in better agreement with Mokha's friction mechanism than Coulomb's. Feasibility of the proposed scheme in the identification of FPS-isolated structures using seismic data has been verified. This may facilitate in-situ performance assessment of structures isolated with sliding-type isolation systems. (C) 2013 Elsevier Ltd. All rights reserved.
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    Physical-Parameter Identification of Base-Isolated Buildings Using Backbone Curves
    (2009-09-01)
    Huang, Ming-Chih
    ;
    Wang, Yen-Po
    ;
    Chang, Jer-Rong
    ;
    Chen, Yi-Hsuan
    ;
    土木工程學系
    In this paper, a simplified system identification procedure is developed to investigate the dynamic characteristics of base-isolated buildings equipped with lead-rubber bearings (LRBs). The multistory superstructure is assumed to be linear on the account of substantial reduction in seismic forces due to the installation of LRBs for which a bilinear hysteretic model is considered. The hysteretic model is in turn characterized by a backbone curve by which the multivalued restoring force is transformed into a single-valued function. With the introduction of backbone curves, the system identification analysis of inelastic structures is simplified to a large extent. The proposed algorithm extracts individually the physical parameters of each floor and the bearing system that are considered useful information in the structural health monitoring. A numerical example is conducted to demonstrate the feasibility of using the proposed technique for physical-parameter identification of partially inelastic based-isolated buildings.