Experimental Results and Analysis of Structural Monitoring Using GNSS and Other Positioning Techniques.

Advances in urbanization and construction technology have made buildings increasingly larger and ostentatious. These large engineering structures that push the limits of engineering and technology, it is become more affected by natural events such as wind, temperature, earthquake etc. Therefore, the construction of such structures and subsequent determination of oscillation amplitudes and spectral characteristics have become an important issue needed. In the scope of this study; GNSS receivers, electronic inclinometer, weather station and total station and reflectors for ground observations are mounted on a tower (in 165 m heights). The data collected simultaneously using this measurements instruments were analyzed and the results were evaluated. It has been observed that the displacement changes obtained from different measuring instruments are compatible with each other and are sufficient to determine this dominant oscillation mode. The movement amplitude and spectral characteristics of the structure representing the structural movements at the time of measurement were examined. The results obtained from three different measuring instruments; showed that the structure is very rigid and makes a dominant movement with a period of 24 hours. This dominant movement of the tower, which lasted for a full day, has been explained by the effect of the temperature change caused by the effect of the sun. [ABSTRACT FROM AUTHOR]