Determinación de las deformaciones de un edificio con GPS

Abstract

In the frame of its researchs concerning GPS positionning the Universidad Pública de Navarra has carried out in 2003 a study to know the possibilities of this positioning technique for monitoring buliding’s displacements. A 30 m concrett building was monitored for several months by observations from a geodetic micronetwork placed around. During the observation period the computed variations in position have standard deviations of 3.1 mm in the XX Axis, 6.6 mm in the YY Axis and 9.1 mm in the ZZ Axis. These values reveals that the building displacements are very smalls and that they are masked by the characteristic errors of GPS observations. The correlation between the observed displacements and the weather variables was analized and only temperature and direct radiation were significant, but the relationship was weak, with low values of the correlation coefficients r. In the visual analysis of the coordinate variations we observed that the building’s displacements observed in the building agree qualitatively with the a priori expected displacements as a function of the movement of the sun throughout the day