Theoretical Analysis of the Structural Performance of Space Trusses Commonly Used in Brazil

Abstract

Space trusses built in Brazil use basically two connection systems. In system 1, the node is formed by the superimposition of tubular section bars with stamped ends connected by a single bolt. The system 2 is a node consisting of welded steel plates to which bars with stamped ends or bars with end plates are connected. The authors have been engaged in theoretical and experimental studies to characterize the behaviour of these systems, including modifications to improve structural performance and establishing analytical models consistent with experimental behaviour. The theoretical analyses by finite element method have been performed utilizing the ANSYS and LUSAS software programs, using three distinct approaches: (i) analyses of isolated bars with section variations at the ends, (ii) analyses of the global behaviour of the structure considering the eccentricities on the connection, section variations in the bars and nonlinear behaviour, and (iii) numerical analyses of the local behaviour of the connection and its influence on global response and collapse modes.

Effect of flexibility of substructures upon thermal behaviour of spherical double layer space truss domes. Part I: Uniform thermal loading

“…Makowski [3] studied many kinds of these nodal connection systems and Souza et al [4] have recently reviewed their use in space structures. Dipaola and Prete [5] comprehensively reported on geometrical and structural definitions of their construction systems.…”

Effects of support positioning on thermal behaviour of double layer space truss domes

“…These advantages and other related points about large span space truss domes are fully discussed by the present authors [1,2], where a literature review of other research works [3][4][5][6][7][8][9][10][11][12] was presented. Marsh [11] commented on the thermal expansions and specified that space trusses are normally single structural assemblies, and are thus required to be free to expand and contract without restraint.…”

Experimental Analysis of Space Trusses Using Spacers of Concrete with Steel Fiber and Sisal Fiber

“…In summary, the motivation of this paper was related to the fact that inexpensive but common 3D trusses present local failure at their connections, specifically in stamped typical connections, which deform excessively causing truss collapse [83]. This problem is explained by the geometric changes generated in typical connections [84] due to the flattened ends of the truss bars and tubes [4], [85,86].…”