WG2: Building Structures as Kinematic Systems
Final Report (1995 1999)
International Association of Geodesy
IAG Special Commission 4
Application of Geodesy to Engineering
SC4 WG2: Building Structures as Kinematic Systems
Chairman: Dr. Gyula Mentes,
July 12, 1999
The working group was organized to carry out research to investigate building motions. The activity of the working group was determined in the following research topics:
Results of the Working Group
The working group has 18 members from 13 countries. Three international seminars and a meeting of the Working Group were organised during this four year period.
New sensors were constructed to investigate the movements of buildings, bridges, power stations, dams, etc. Temperature variations cause the strongest effect on the accuracy of the measuring systems. To solve this problem high precision, contactless and drift-free CCD-displacement sensors with high stability were developed for continuous observation of the movements of industrial objects (Mentes, 1998). Two systems ("fluid level" and "fluid pressure") of hydrostatic tiltmeters were constructed. For both types of instruments new dynamic (Kahmen and Mentes, 1998) and thermal models (Mentes and Kahmen, 1998) were developed to achieve a high accuracy and to eliminate the thermal effects. High-precision optical and laser instruments were developed for measurement of small linear and angular movements (Dede, 1998; Karsounskaia and Parvulyusov, 1998; Vassena et al. 1998) and for vibration measurements of large objects (Tervaskanto, 1998).
New calibration methods and instruments were developed to calibrate linear and angular displacement sensors (Mentes, 1998), tilt (Mentes et al., 1996) and strain meters (Mentes, 1998; Santala, 1998). Image processing techniques was developed for determination of the influence of the refraction on the accuracy of the deformation measurements ( Flach and Hennes, 1998).
New methods using GPS techniques were developed for deformation and vibration measurements (Hartinger and Brunner, 1998; Horemuz, 1998; Fan, 1998; Santerre et al., 1998; Bumker and Fitzen, 1998; Flesch, 1998). Automatic measuring methods were developed for deformation measurements (Mönicke, 1998; Zhenglu et al. 1998). Combination of different techniques (GPS, Satelite images, photogrammetric techniques) were used for deformation measurements of bridges, reservoir walls, etc.(Dede et al. 1998; de Seixas, 1998; Maas, 1998; Uzdiger and Altan, 1998).
New data processing algorithms for deformation measurements of bridges, buildings, tunnels, etc. were developed (Wübbena and bagge, 1998; Mok, 1998; Grimm-Pitzinger et al. 1998; Prószynski, 1998; Meha and Kabashi, 1998) Thermal models were developed for increasing the accuracy of deformation measurements (Kapovic and Roic, 1998).
Deformation processes in the ground and the associated dynamics in the ground's near-surface regime are in connection with the motion of buildings and are of highest interest at construction of tunnels (Ingensand et al. 1998). To study local ground motions and dynamics two borehole tiltmeters and simultaneous GPS and EDM measurements were carried out (Lehmann et al., 1998; Mentes, 1998). To prove that the obtained results can be very well used to study the coupling between ground dynamics and monument motion simultaneous measurements by two borehole tiltmeters in the Sopron TV tower's fundament and in the vicinity of the tower ground tilt measurements are planed to carry out. The meeting of the Working Group has prooved that the investigation of the connection between ground and building motions is very important at deformation measurements on industrial objects (see the presentations of the meeting of the Working Group in Sopron!).
Papers presented on the meeting of the Working Group "Building Structures as Kinematic Systems" in Sopron on March 30th, 1999
List of publications
List of members: