Analytical and Experimental Studies of a Shearwall Stair Shaft


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Title: Analytical and Experimental Studies of a Shearwall Stair Shaft

Author(s): L. Bogue Sandberg and Fred W. Beaufait

Publication: Special Publication

Volume: 63


Appears on pages(s): 609-622

Keywords: deflection; deformation; earthquake resistant structures; elastic analysis; finite element analysis; lateral pressure; loads (forces); models; multistory buildings; shearwalls; stairways; stiffness; stresses; structural analysis; torsion.

Date: 8/1/1980

The results of a study of the behavior of a shear wall stair shaft are summarized. Comparisons are made between deflections of a 1/24 scale Plexiglas model and predicted deflections from beam theory and finite element analyses. Both lateral loads and torsion are considered. Stair system stresses from a finite element analysis of a full scale, concrete prototype of the model are summarized. It is concluded that beam theory tends to over-estimate shear wall stiffness, and than an effort must be made to prevent damage to the stair system from severe shear wall deformations.