G. Dehdashti et Lc. Schmidt, DOME-SHAPED SPACE-TRUSSES FORMED BY MEANS OF POSTTENSIONING, Journal of structural engineering, 122(10), 1996, pp. 1240-1245
Citations number
5
Categorie Soggetti
Engineering, Civil","Construcion & Building Technology
Dome-shaped space trusses can be derived from a fiat configuration by
means of posttensioning. The structure considered here is devised to b
e a near mechanism initially and during the posttensioning operation.
It is a near mechanism as only the flexural stiffness of the continuou
s top chords provides any resistance to deformation. Therefore, no app
reciable force is induced in the members of the structure during the s
hape formation process, The results of experimental and theoretical wo
rk on the shape formation of a dome-shaped space truss by means of pos
ttensioning are presented herein. An analytical procedure that include
s both geometric and material nonlinearities is developed to determine
the final shape of the dome-shaped space truss, using commercially av
ailable finite-element software. The ultimate aim is to lead to signif
icant economies in the construction of large-span lightweight structur
es by eliminating or minimizing the need for scaffolding and heavy cra
nes in the Shaping and erection of such structures.