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Lokální odpory na stěně umístěných překážek
Chára, Zdeněk ; Hoření, Bohumír
The influence of surface mounted obstacles on free level of channel flow is discussed. The obstacles of square cross section are placed sequentially along a hydraulic flume and perpendicularly to the flow direction across the whole channel width. Three various spacing between the obstacles - 5H, 11H and 23H (H is height of the obstacle) were tested for different flow discharges. The surface levels were recorded and the results were compared with numerical simulations. Based on the experimental data and numerical simulations the resistance coefficients of the individual obstacles were determined.
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Compliance criteria to be proved by the analysis of a civil engineering structure
Fischer, Ondřej
Any (not only) civil engineering structure must meet two fundamental requirements: the safety and serviceability before being put into service. While the safety is in general controlled by the loading and behaviour of the structure and by the resistance of its materials, which all are strongly supported by Codes and software packages, the serviceability is often left on the account and experience of the engineer. Some reflections and examples of failures are given in what follows.
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