Studies on Non-Linear Vibration Characteristics of Re-inforced Concrete Beams Using Frequency Response Data
Publish place: 9th International Conference on Acoustic and Vibration
Publish Year: 1398
نوع سند: مقاله کنفرانسی
زبان: English
View: 507
This Paper With 8 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
ISAV09_090
تاریخ نمایه سازی: 11 دی 1398
Abstract:
This study investigates the possibility of using changes in the nonlinear vibration characteris-tics to detect damage in reinforced concrete beams. Two concrete beam specimens were gradually damaged by means of static loading tests. Following each loading step, the beams were unloaded and dynamic tests were carried out in suspended case. The nonlinear vibration characteristics of the specimens were studied by applying frequency domain methods and the presence of harmonics and amplitude dependency of resonant frequencies are identified. The non-linearity in dynamic behaviour of concrete beams are quantified by Hilbert transforms of the frequency response functions. The comparison of results of nonlinear techniques with visual progressive cracking of specimens indicates that the presence and also the degree of nonlinearity are capable of detecting levels of damage in concrete beams.
Keywords:
Authors
Neda Baghiee
Assistant Professor, Civil Engineering Department, Quchan University of Technology, P.O. Box ۹۴۷۷۱-۶۷۳۳۵, Quchan, Iran
Mohamad Reza Esfahani
Professor, Civil Engineering Department, Ferdowsi University of Mashhad, P.O. Box ۹۱۷۷۵-۱۱۱۱, Mashhad, Iran
Kazem Moslem
Former Assistant Professor, Civil Engineering Department, Ferdowsi University of Mash-had, P.O. Box ۹۱۷۷۵-۱۱۱۱, Mashhad, Iran