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This paper investigates the characteristics of unstable behaviour and critical buckling load by joint rigidity of framed large spatial structures which are sensitive to initial conditions. To distinguish the stable from the unstable, a singular point on equilibrium path and a critical buckling level are computed by the eigenvalues and determinants of the tangential stiffness matrix. For the case study, a two-free node example and a folded plate typed long span example with 325 nodes are adopted, and these adopted examples' nonlinear analysis and unstable characteristics are analyzed. The numerical results in the case of the two-free node example indicate that as the influence of snap-through is bigger; that of bifurcation buckling is lower than that of the joint rigidity as the influence of snap-through is lower. Besides, when the rigidity decreases, the critical buckling load ratio increases. These results are similar to those of the folded-typed long span example. When the buckling load ratio is 0.6 or less, the rigidity greatly increases.
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참고문헌 (31)
참고문헌 신청
Thompson JMT / 1983 / On the buckling and imperfection-sensitivity of arches with and without prestress / International Journal of Solids and Structures 19(5):445~459
El-Sheikh A / 1998 / Design of space truss structures / Structural Engineering and Mechanics 6(2):185~200
Lopez A / 2007 / Numerical model and experimental tests on single-layer latticed domes with semi-rigid joints / Computers and Structures 85:360~374
Huseyin K / 1973 / The multi-parameter perturbation technique for the analysis of nonlinear system / International Journal of Nonlinear Mechanics 8(5):431~443
Abedi K / 1991 / Progressive collapse of single-layer braced domes / International Journal of Space Structures 11(3):291~306
El-Sheikh A / 1998 / Design of space truss structures / Structural Engineering and Mechanics 6(2):185~200
Lopez A / 2007 / Numerical model and experimental tests on single-layer latticed domes with semi-rigid joints / Computers and Structures 85:360~374
Huseyin K / 1973 / The multi-parameter perturbation technique for the analysis of nonlinear system / International Journal of Nonlinear Mechanics 8(5):431~443
Abedi K / 1991 / Progressive collapse of single-layer braced domes / International Journal of Space Structures 11(3):291~306
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