DETERMINATION OF THE EFFECT OF TiO2 ON THE DYNAMIC BEHAVIOR OF SCALED CONCRETE CHIMNEY BY OMA

Tuhta S., Gunday F.

MATERIALI IN TEHNOLOGIJE, cilt.55, sa.3, ss.459-466, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 55 Sayı: 3
  • Basım Tarihi: 2021
  • Doi Numarası: 10.17222/mit.2021.059
  • Dergi Adı: MATERIALI IN TEHNOLOGIJE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Directory of Open Access Journals
  • Sayfa Sayıları: ss.459-466
  • Anahtar Kelimeler: Operational Modal Analysis, nanomaterial, EFDD, TiO2, MECHANICAL-PROPERTIES, MODAL IDENTIFICATION, VIBRATION ANALYSIS, NANORODS, COMPOSITES, RESTRAINTS, MATRIX
  • Ondokuz Mayıs Üniversitesi Adresli: Evet

Özet

In this article, the dynamic parameters (frequencies, mode shapes, damping ratios) of a scaled concrete chimney and the dynamic parameters (frequencies, mode shapes, damping ratios) of the entire outer surface of the 80-micron-thick titanium dioxide are compared using the operational modal analysis method. Ambient excitation was provided from micro tremor ambient vibration data at ground level. Enhanced Frequency Domain Decomposition (EFDD) is used for the output-only modal identification. From this study, very best correlation is found between the mode shapes. Titanium dioxide applied to the entire outer surface of the scaled concrete chimney has an average of 16.34 % difference in frequency values and 9.81 % in damping ratios, proving that nanomaterials can be used to increase the rigidity in chimneys, in other words, for reinforcement. Another important result determined in the study is that it has been observed that the adherence of titanium dioxide and similar nanomaterials mentioned in the introduction to concrete chimney surfaces is at the highest level.