W pracy przedstawiono analizę porównawczą wyznaczonych doświadczalnie i obliczonych sztywności na zginanie i ugięć jednoprzęsłowych belek swobodnie podpartych zbrojonych prętami bazaltowymi BFRP (Basalt Fibre Reinforced Polymers). Belki typu BFRP wykonano z betonu C30/37 ze zbrojeniem w postaci prętów bazaltowych o średnicy 8 mm. Ponadto wykonano belki referencyjne ze zbrojeniem stalowym tej samej średnicy. Badano ugięcia i zarysowania oraz nośność belek. Stwierdzono, że ugięcia i szerokość rys w belkach zbrojonych prętami bazaltowymi są znacznie większe niż w belkach zbrojonych stalą.
Three cultivars of Hyacinthus orientalis L. were forced in pots under artificial light using fluorescent lamps which emitted white, blue, green, yellow and red light. Daily light dose was 0.54 mol·m⁻² (25 μmol·m⁻²·s⁻¹ × 6 h). Significant effect of light colour on postharvest longevity and quality of plants was observed. The post-harvest longevity of hyacinths depends, among others, on the length of the flowering period and it is the longest after the application of white and blue light colour. Red light decreased flower life and deteriorated the ornamental value. The rigidity of inflorescence shoots depended on the cultivar, but in all flowers, it was significantly lower than it is recommended in market turnover for flowering plants grown in pots. It also refers to leaves, whose elongation is the greatest under lamps with red colour. In the ‘Fondant’ cultivar, elongation caused a maximal flabbiness of inflorescence shoots and leaves.
This article presents general rules of determining load carrying capacity of timber beams strengthened with FRP materials with accordance to the American Standard PCF-5100 with relevance to the European. In addition, the conclusions from the comparison of the theoretical load carrying capacity and deflections evaluated on basis of PCF-5100 and PCF-6046 with the results of the laboratory tests conducted on full-scale beams are presented.