The object of the paper is experimental and numerical verification of a pontoon bridge prototype section. The
main part of a single segment is a waterproof cassette which contains a shell (pontoon). After filling with the air,
the pontoon assures the required buoyancy. The cassette, in which the shell is located, has a movable bottom. Pontoon
bridges are built of ready-to-use repeatable segments and they may be used as temporary crossings. Verification of
the bridge modules was performed by launching a demonstrator compound of two modules of the pontoon bridge
section, filling the pontoons with air and measuring their immersion. The test was performed in the pool, in the
Military Engineering Works. S.A. (WZInż. S.A.) in Deblin. Recording and measurements were performed with two
Phantom V12 cameras placed on static tripods. It allowed reading from each of the cameras the heights of the
midpoints of the prow and the starboard above the water surface, and the inclination angle of the pontoon unit in
transverse and longitudinal planes. The combination of these results allowed calculation of height of the roadway
centre of pontoons set above the water surface. Displacement and stability of the structure was specified based on
analytical calculations. This paper presents the results of numerical calculations of launching a pontoon bridge
section demonstrator. Correctness of the numerical methods of calculation was examined based on a comparison of
numerical and experimental results.
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