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International Journal of Concrete Structures and Materials

Table 1 Estimates of yield curvature provided in Priestley et al. (2007).

From: An Estimate of the Yield Displacement of Coupled Walls for Seismic Design

Circular concrete column

2.25εy/D

Rectangular concrete column

2.10εy/hc

Rectangular concrete wall

2.00εy/lw

Symmetrical steel section

2.10εy/hs

Flanged concrete beam

1.70εy/hb

  1. where εy is the yield strain of the reinforcing steel, and D, hc, lw, hs and hb are the depths of the circular column, rectangular column, rectangular wall, steel section and flanged concrete beam sections, respectively. One may notice a distinction in that expressions of the yield curvature initially were functions of the overall height of the member section (Priestley et al. 1995), while later studies (Hernández-Montes and Aschheim 2003) introduced the effective depth (to the centroid of the tension reinforcement) as a more physically meaningful term in yield curvature expressions for RC members.
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