Author

SCHULTZ, A. and BEAN POPEHN, J.
University of Minnesota, Department of Civil Engineering
TANNER, J.
University of Wyoming, Department of Civil Engineering

Abstract

Unreinforced masonry (URM) walls under eccentric vertical compression and out-of-plane lateral loading (e.g., wind) are subject to moment magnification, due to second-order effects (i.e., P-“delta” effects). Recent work by the authors indicates that the increase in out-of-plane bending moment due to P-“delta” effects can be estimated using moment magnifiers based on elastic stability theory. The moment magnifiers require calculation of the buckling load, and accuracy is ensured as long as the effect of eccentricity of vertical loading is considered in the calculation of the buckling capacity. In the present paper, the authors investigate the influence of lateral loading on the buckling strength and, consequently, on the magnitude of the moment magnifier for URM walls. The magnifier is verified with experimental data.

Key words
slenderness, imperfection, second order, axial load eccentricity, unreinforced masonry, buckling strength, lateral load