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Geometryczne kształtowanie pasmowych przekryć powłokowych z płaskich arkuszy blachy trapezowej

Abramczyk J.

Zeszyty Naukowe Politechniki Rzeszowskiej. Budownictwo i Inżynieria Środowiska

2011

z. 58, nr 1

7-18

The paper presents a way of geometrical shaping of the building structural covers of many striped shells made of the flat profiled steel sheets free deformed to the shell shape during assembly work. The striped cover is composed of the continuous rectilinear shells (stripes) running transversely the whole structure, so that the neighboring strips have got the common edges or the flat discontinuity between the neighboring strips are there. The way consists in creating planes separating the neighboring sectors Sigmai_1and Sigmai (of the ruled surfaces Betai_1 and Beta1] of the space geometrical structure Fip modeling the building structural cover. The ruling ti of he ruled surface containing the border lines of the sectors Sigmai_1 and Sigmai are calculated in these planes. The way assures the freedom of transversal strains of the free deformed sheets during assembly, hence the sheets are subject to free deformations. The above activity makes it possible to obtain the small intentional effort and reserve the conveyance capacity of the useful load for the successive shell folds although the shell form can be almost free and attractive.