The primary aim of the paper is to present a simple method for determining the changes in stiffness of a composite beam. The experimental model was made from wood and plaster boards. It was simply supported beam with a length of 4 m. Accelerations were measured at 24 points along the beam. In either case data for intact and damaged models were acquired. The identification of the damage was done using a code developed by the authors. The vertical mode-shapes were analyzed, so changes in the stiffness could be detected.
Authors:Ramona Gabor, Edward Petzek, and Radu Bancila
In this paper the most relevant and an important aspect of the motorway crossings is presented. The composite bridges are, in comparison with steel bridges and concrete bridges, the most proper solution for motorway crossings because they are efficient, the erection time is shorter and the “in situ” operations can be minimized. The attention is focused on general design criteria of these crossings. Fabrication and erection methods have a big influence on the detailed design of the steel structure. The supporting steel members must be designed so that they do not interfere with the placing of concrete slab.
. Low-to-high cycle fatigue behavior of wood-concrete compositebeams with notched interlayer connections, Pollack Periodica, An International Journal for Engineering and Information Sciences , Vol. 8, No. 1, 2013, pp. 3
Bujnák J., Furtak K. Investigation on cracks creation and propagation in concrete slab of compositebeams, Communications-Scientific Letters of University of Žilina, Vol. 13, No. 3, 2011, pp. 9–13.
, Fragiacomo M. , Gutkowski R. , Atadero R. , Ivanyi P.
Low-to-high cycle fatigue behavior of wood-concrete compositebeams with notched interlayer connections , Pollack Periodica , Vol. 8 , No. 1