Badania eksperymentalne dotyczyły odkształceń żelbetowych belek zespolonych oraz monolitycznych belek kontrolnych, mających różne powierzchnie elementu podstawowego i różny stopień zbrojenia. Badania wykazały, że na nośność styku między betonami ułożonymi w różnych terminach ma wpływ nie tylko współczynnik zależny od szorstkości płaszczyzny zespolenia, ale również sztywność elementu.
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The aim of the research was to determine the strains in reinforced concrete beams poured in two stages. They were compared with the strains observed in control monolithic beams. The series of beams differs from each other according to the smoothness of the connection surface (smooth, rough and with indentations) and the reinforcement ratio. The research demonstrated that not only roughness of the surface has the influence on the shear capacity of the connection between concrete layers cast at different times, but also the stiffness of the element matters.
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This paper presents a new method for extracting topographic features from images approximated by triangular meshes. Peaks, pits, passes, ridges, valleys, and flat regions are defined by considering the topological and geometric relationship between the triangular elements. The approach is suitable for several computer-based recognition tasks, such as geographic information systems, rapid prototyping, computer graphics, and reverse engineering. The method has been applied to a wide range of images, producing a good compromise between accuracy and time requirements.
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