Determining the behaviour of high-rise structures with geodetic hybrid sensors


Pehlivan H., Aydin O. , Gulal E. , Bilgili E.

GEOMATICS NATURAL HAZARDS & RISK, cilt.6, ss.702-717, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 6 Konu: 8
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/19475705.2013.854280
  • Dergi Adı: GEOMATICS NATURAL HAZARDS & RISK
  • Sayfa Sayıları: ss.702-717

Özet

Observing the normal oscillations and the behaviours of high-engineering structures has become almost a necessity in terms of construction security and human health. For this purpose, an real-time kinematic GPS (NovAtel 400) and a tilt sensor (Leica Nivel20) were installed in a TV tower (220m high) located in Istanbul, Turkey. The observation serials were recorded over a period of 9days. All data-sets in X and Y directions were examined in the time domain and were analyzed using FFTEuro. The dominant frequency values (significant frequencies) were determined by comparing at the high- and low-frequency values. These dominant frequencies showed that the tower made 4- and 6-second short-period oscillations and 24- and 12-hour long-period oscillations. All the observation signals were re-created by the significant low-frequency values using the inverse Fourier transform. Thus, the motion model of the tower was determined over 9days. In this study, the 24-hour and 12-hour periodic oscillations were defined that represent the behaviour of the tower in relation to the effect of the sun's radiation and the temperature changes.