ANALYSIS OF SHEAR WALL STRUCTURES ON ELASTIC FOUNDATIONS

A method for analyzing shear wall structures on elastic foundations is presented. The shear walls are modeled using a nine-noded isoparametr ic quadrilateral plane stress element and the soil is modeled using a three-noded quadratic element that includes the Vertical subgrade reac tion and soil Shear stiffness. It is observed that analyzing shear wal l structures as fixed cantilevers, i.e. ignoring soil-structure intera ction, significantly underestimates the wall drift. It is shown that i ncluding soil shear stiffness in the analysis reduces the maximum drif t and increases the normal stresses in the wall, especially for poor s oil. It is also shown that ignoring the soil deformation underestimate s the bending moment in the lintel beams of coupled shear walls, and t he transverse bending moment in core structures. (C) 1997 Elsevier Sci ence Ltd.