کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4924252 1430843 2017 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural control and health monitoring of building structures with unknown ground excitations: Experimental investigation
ترجمه فارسی عنوان
کنترل ساختاری و نظارت بر سلامت سازه های ساختمانی با تحرک ناشناخته زمین: تحقیقات تجربی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


- Real-time vibration control and damage detection of building structure was conducted.
- Structural damages and unknown seismic inputs were identified satisfactorily.
- Structural vibration was significantly reduced using MR dampers.

When health monitoring system and vibration control system both are required for a building structure, it will be beneficial and cost-effective to integrate these two systems together for creating a smart building structure. Recently, on the basis of extended Kalman filter (EKF), a time-domain integrated approach was proposed for the identification of structural parameters of the controlled buildings with unknown ground excitations. The identified physical parameters and structural state vectors were then utilized to determine the control force for vibration suppression. In this paper, the possibility of establishing such a smart building structure with the function of simultaneous damage detection and vibration suppression was explored experimentally. A five-story shear building structure equipped with three magneto-rheological (MR) dampers was built. Four additional columns were added to the building model, and several damage scenarios were then simulated by symmetrically cutting off these columns in certain stories. Two sets of earthquakes, i.e. Kobe earthquake and Northridge earthquake, were considered as seismic input and assumed to be unknown during the tests. The structural parameters and the unknown ground excitations were identified during the tests by using the proposed identification method with the measured control forces. Based on the identified structural parameters and system states, a switching control law was employed to adjust the current applied to the MR dampers for the purpose of vibration attenuation. The experimental results show that the presented approach is capable of satisfactorily identifying structural damages and unknown excitations on one hand and significantly mitigating the structural vibration on the other hand.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 390, 3 March 2017, Pages 23-38
نویسندگان
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