Member Buckling with Joint Instability – Design Application

Hanaor, Ariel; Dallard, Pat; Levy, Robert; Gelberg, N.

doi:10.1260/0266351001495143

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…Node instability may lead to buckling coefficients greater than 1 and, thus, reduce the bars' resistance to normal loads. Recent studies 18,19,20,21 have investigated the problem of node instability and its influence on the normal load strength of the compressed elements of space trusses. Several researchers have demonstrated practical procedures to determine the effective buckling length of space truss bars.…”

Section: Theoretical and Experimental Results Of Tests On Compressed mentioning

confidence: 99%

“…Full section ends K=0.70 Reduction section ends K=0.90 Stamping section ends K=0.95 These recommendations should be followed cautiously since they may be unsafe, particularly in connection systems susceptible to instability. Hanaor's studies 20,21 have shown that node instability may lead to bar buckling coefficients of over 1.3.…”

Section: Theoretical and Experimental Results Of Tests On Compressed mentioning

confidence: 99%

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

Souza

Gonçalves

Maiola

et al. 2003

International Journal of Space Structures

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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.

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Section: Theoretical and Experimental Results Of Tests On Compressed mentioning

confidence: 99%

Section: Theoretical and Experimental Results Of Tests On Compressed mentioning

confidence: 99%

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

Souza

Gonçalves

Maiola

et al. 2003

International Journal of Space Structures

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show abstract

“…It deals with the project, analysis and sizing with practical visions acquired by experience. Hanaor, et al 2000 evaluated the influence of connection stiffness on the elastic buckling of bars under compression in space trusses. The analytical procedure indicates the importance of studies on the real behavior of elements under compression due to the instability of the connection, and for some types of nodes, the buckling coefficient of the bars can exceed 1.3.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of truss systems with stiffened flattened end-bars

Mazon

Sarmanho

Nunes

et al. 2018

Lat. Am. j. solids struct.

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Circular hollow sections are usually used in long-span roof truss systems. One of the typology for connecting elements in such structures involves the flattening of bar ends. This article presents the numerical analysis of a plane truss composed of circular hollow sections, in which diagonal bars have flattened ends. In this sense, a new flattening typology called stiffened flattening is proposed, characterized by a non-flat geometry, with the creation of stiffeners in the lateral edges of the diagonal flattened ends. The diagonal connecting system with the chord members uses connecting plates. The plates are welded to the chords and the diagonals are connected to latter through a single bolt. The numerical analysis using finite elements method was developed in two stages through ANSYS software with the Parametric Design Language APDL , in which parameters such as geometry, materials, element types, boundary conditions and loads are specified. A non-linear analysis was performed using shell elements on the chords, diagonals, plates and welds, and contact elements between the diagonals with stiffened flattened ends and the connecting plates. Initially, a numerical study of the connecting node and the stiffened flattened end was performed, and the results directed the modeling of the plane truss. The numerical results were calibrated with the experimental truss results in full scale. The numerical result of the plane truss was also compared to a theoretical study, considering the axial load eccentricity applied in the diagonal with stiffened flattened ends. The study was based on the consideration of combined effects of axial force and bending moment provided by the Brazilian standard ABNT NBR 8800:2008. The final results indicate that the numerical model proposed is efficient and has good correlation with the experimental and theoretical results.

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Progressive Collapse Behavior of Large-span Truss String Structures Subjected to Cable Failure

Zhang,

Lu,

et al. 2024

KSCE J Civ Eng

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Member Buckling with Joint Instability – Design Application

Cited by 7 publications

References 6 publications

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

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

Numerical analysis of truss systems with stiffened flattened end-bars

Progressive Collapse Behavior of Large-span Truss String Structures Subjected to Cable Failure

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