Mechanical Behavior of Single-Layer Two-Way Grid Cylindrical Latticed Shell with Out-of-Plane Tension Members
Single layer two-way grid shell with in-plane and out-of-plane tension members is a new type of single-layer latticed shell roof. This study treats the effects of tension member installation on the buckling load and strength of a single layer two-way grid cylindrical shell roof by the numerical method. The tension members are installed to stiffen the rigidity of a single layer two-way grid shell roof and improve its stability behavior. Tension member installation and placement pattern is focused as both diagonal members of two-way grids and out-of-plane stiffened members in a cylindrical surface. The diagonal member and the out-of-plane member are used to increase the in-plane and the out-of- plane rigidity of a single layer two-way grid shell, respectively. The tension member placement pattern, the load distribution patterns, the initial imperfections and the initial axial force are considered for the numerical calculation parameters. It is confirmed by the numerical analysis that the tension members in out-of-plane and diagonals caused the increase in the buckling and strength of two-way grid shell.
Experimental Studies of the Cylindrical Mesh Shell Model
Experimental studies of the effect of full and one-sided external load on a metal cylindrical mesh shell have been conducted. Regularities of stress and displacement distribution over the surface are recorded. The regions with the largest internal force factors and deformation parameters were identified. The values of the experimental critical load and the number of half wave of the form of stability loss are obtained. The risk of unilateral application of the load was established when the critical load was reduced and the maximum displacement exceeded.
Buckling load of steel single-layer reticulated domes of circular plan
A simple review of recent progress in the evaluation of buckling loads of steel single layer reticulated domes is presented. The emphasis is put on the approximate evaluation based on effective rigiditis and discrete beam-column elements with a direction to present approximate evaluation methods for linear, elastic-nonlinear and elastic-plastic buckling loads under vertical loads like self-weight. Some parts follow the IASS Recommendations in 1979 and related papers for shells, since buckling of continuum shells are related keenly with the present steel reticulated domes.