A 12-node hybrid stress brick element for beam/column analysis

In this paper, a hybrid stress 12-node brick element is presented Its assum ed stress field is derived by first examining the deformation modes of a ge ometrically regular element and then generalizing to other element configur ations using tensorial transformation. The total number of stress modes is 30 which is minimal for securing the element rank. To reduce the computatio nal cost associated with the fully populated flexibility matrix, the admiss ible matrix formation is employed to induce high sparsity in the matrix, Po pular beam bending benchmark problems are examined. The proposed elements d eliver encouraging accuracy.