Monitoring of Tall Building’s Dynamic Behaviour Using Precision Inclination Sensors

Abstract: The observations made on the engineering structures like dams, bridges, viaducts and high buildings provide to determine whether the structure was built in accordance with the project or not and whether it behaves reliably or not. In the light of this information, new information that should be considered in the assumptions used in the project can be obtained and some parameters can change. The dynamic parameters like wind, temperature, earthquake loads especially acting on the tall buildings cause the structure move in the horizontal direction. A high precision inclination sensor, a GPS site and an anemometer were installed in order to observe the dynamic behaviors of the 30-storey high Rixos Hotel building in the horizontal direction. The floors of the building are formed from a lobby, a clerestory, 4 basement floors, an equipment floor and 26 floors with hotel rooms. The biaxial inclination sensors namely Leica Nivel 220 were installed at the 21st and 26th floors on one of the shear-nucleus. The GPS site was located at a place on the roof from which the satellite view would be maximum and the behavior of the building would be reflected at best, and the Young Anemometer was installed at a most dominating place on the roof in order to measure the velocity and the direction of the wind. The horizontal movements of the building, the velocity and the direction of the wind are still continuously observed using the biaxial inclination sensor and the anemometer. In this paper, there were given information about the installation plan of inclination sensor, anemometer and GPS point that were installed to determine the dynamic behaviors of the building. We dealt with monitoring strategy of tall building by using inclination sensor and GPS, the data-acquisition periods, comparison of two monitoring system and the purposes of the study. In addition, we explained system and system identification procedure related to deformation monitoring. 1