The strain and plastic rotation demands are determined using the total displaced axis rotation θk obtained at the element end . Structure performance is determined as a result of unit strain and plastic rotation demands calculated by linear performance analysis in existing structures.
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ICONS
h = Section height
L p = Plastic hinge length
M y = Effective yield moment
ϕ y = Yield curvature
ϕ t = Total curvature
θ p = Plastic rotation demand
θ y = Yield rotation
θ k = Displaced axis rotation
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15.5.4.5 - plastic rotation lead section of element θ p , Eq. (15A.2) shall be obtained from.
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