Deflections, forces, and moments of composite stiffended hypar shell roofs under concentrated load

Abstract

The present paper applies a combination of an eight-noded shell element with a three-noted beam element, both curved and isoparametric to solve a bending problem of a composite stiffened hypar shell subjected to concentrated load. Benchmark problems are solved to validate the suitability of the approach and a wide variety of stiffened hypar shell problems are solved by varying the boundary condition, lamination, and curvature of the shell. Different depths, arrangements, and eccentricities of stiffeners are considered. Both static deflections and force/moment resultants are examined thoroughly. The performances of the different shell options with varying boundary conditions, stiffener arrangements, and laminations are studied by arranging them rankwise with respect to different shell actions and through a typical relative performance matrix, which will enable a designer to make a rational choice between a number of options.