Detection of Changes in Global Structural Stiffness Coefficients Using Acceleration Feedback

Sebastijanovic, Nebojsa; Yang, Henry T. Y.; Li, Zhenning

doi:10.1061/(asce)em.1943-7889.0000159

Cited by 3 publications

(1 citation statement)

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“…The global damage diagnosis algorithm presented in previous studies 11, 12, 18 uses one of the three kinds of measurements, displacements, velocities, or accelerations, as inputs. For the purpose of simplicity, displacement feedback is used in this study.…”

Section: Global Detection Of Damagementioning

confidence: 99%

Adaptive structural control using global vibration sensing and model updating based on local infrared imaging

Lin

Sebastijanovic

Yang

et al. 2011

Struct. Control Health Monit.

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This paper presents a hybrid structural health monitoring system that was connected to an adaptive structural control algorithm to improve the control performance. The proposed vibration-based global damage detection method is combined with a local damage identification method using sonic infrared imaging. The numerical model and the monitor are updated for continuous structural monitoring and control during future earthquakes. The previously developed damage diagnosis technique is enhanced by including an equivalent simplified lumped-mass model deduced from a complex frame structure. Changes in global dynamic response characteristics due to damaged members or joints are first observed and the damage can be detected and located during the earthquake event. After the earthquake event, local damage is inspected in detail using sonic infrared imaging. The example of a three-story steel frame structure with a damaged column and a damaged joint is presented to demonstrate and evaluate the usefulness and effectiveness of the proposed concept. Results from numerical simulations indicate that the adaptive control strategy based on model updating improves the control performance. Figure 2. Identification of masses and stiffness for the simplified 3-dof lumped mass model of a 3-story frame structure: (a) frequency comparison and (b) response comparison. ADAPTIVE STRUCTURAL CONTROL USING GLOBAL VIBRATION SENSING

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Section: Global Detection Of Damagementioning

confidence: 99%