Abstract
AbstractIn general, today two types of launching bearings are used in the construction of large steel and steel concrete composite bridges. These are sliding rockers and systems with hydraulic bearings. During incremental launching, the center of the webs of the superstructure is not perfectly in line with the center of the launching bearings due to unavoidable tolerances. In contrast to sliding rockers, the hydraulic bearings are not supported linearly in the transverse direction and the buckling behaviour may be affected by eccentricities. There is currently no scientific explanation for this assumption. The advantages and disadvantages of the respective systems are under discussion. At the Technical University, large‐scale buckling tests were carried out on longitudinally stiffened plates under biaxial stresses with different launching bearings and eccentric load introduction. In this paper we present the test results and discuss the advantages and disadvantages of the respective systems. Based on the experimental results, a numerical model was validated. The test results as well as the results from the validated numerical model will show the influence on the buckling behaviour from the respective launching bearings.
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