Yield curvature for seismic design of circular reinforced concrete columns

Abstract

Significant research efforts have been devoted in recent years to the development of displacement-based seismic assessment and design methodology, recognising the shortcomings of traditional, code-specified force-based procedures. Recent advances in direct displacement-based seismic design of columns rely on the estimates of yield curvature for determining seismic design forces to satisfy the specified seismic performance levels. This paper presents simple expressions for estimating the effective yield curvature for normal-and high-strength circular reinforced concrete columns based on moment-curvature analyses of a large number of column sections. Such expressions can be programmed into spr..