Analysis of Deformations of the Skylight Construction at the Main Hall of the Warsaw University of Technology

Abstract

The paper presents technology and results of measurements of the steel construction of the skylight of the Main Hall of the Warsaw University of Technology. The new version of the automated measuring system has been used for measurements. This system is based on Leica TCRP1201+ total station and the TCcalc1200 software application, developed by the author, which operates on a laptop computer connected with the total station by the wire. Two test measurements were performed. Each of them consisted of cyclic measurement using the polar method, from one station; points located on the skylight construction, as well as control points located on concrete, bearing poles, were successively measured. Besides geometrical values (such as Hz, V angles and the slope distance D), the changes of temperature and atmospheric pressure, were also recorded. Processed results of measurements contained information concerning the behaviour of the skylight; asymmetry of horizontal displacements with respect to the X axis have been proved. Changes of parameters of the instrument telescope and changes of the instrument orientation were also stated; they were connected with changes of the temperature. The most important results of works have been presented in the form of diagrams.

Investigations Over Using Mirrors and Prisms in Geodetic Monitoring of Building Structures

“…This is confirmed by the results of laboratory tests of Total Station Leica 1200 series made by Kirschner and Stempfhuber [3], as well as practical tests of Wojcik et al [7] concerning surveys of bridges deflections using Leica TPS1203. The results obtained by these authors characterized accuracy (RMSE) of better than 1 mm at 20 m. Similar results were reported by Mazalová et al [4] and Odziemczyk [5], while on the base on their tests Cosser et al [1] noticed that TS Leica TCA2003 can be used for bridge monitoring for distances up to 200 m with accuracy of several millimeters.…”

Stability test of TCRP1201+ total station parameters and its setup

“…This solution was used in TC-calc software working on PC (Windows) in order to carry out the measurement tests. Detailed information on the TC-calc software can be found in the author's earlier papers [12] and [13]. The ability to read the instrument's current tilt value turned out to be a particularly important feature of the TCRP1201+ total station.…”

Investigation of Stability of Precise Geodetic Instruments Used in Deformation Monitoring

“…The course and results of measurements were described by (Wożniak M. et al 2008), (Odziemczyk W., Woźniak M. 2009) or (Odziemczyk W. 2014). Construction of skylight consists of two roof coats, which causes large temperature fluctuation during sunny days.…”