Deformation analysis of Ratkov Laz bridge using Pelzer and IWST method

Abstract

The paper discusses the application of geodetic methods of deformation analysis of reinforced concrete structures made of prestressed concrete. In the paper, two independent methods of deformation analysis are applied on the example of the Ratkov Laz bridge in Montenegro, based on two epochs of geodetic measurements in a 3D geodetic network, which consists of the reference part of the network and points on the bridge. The results of the Pelzer’s method and the robust IWST method were analyzed. Although similar displacement vectors are obtained using the two methods, there are some differences in the identification of unstable points on the bridge. The IWST method identified significantly fewer points as unstable compared to the Pelzer’s method. The aforementioned methods of deformation analysis are of great importance in the geodetic observation of all types of engineering facilities.