Formulas: general stability requirements

Formula 1

a stability coefficient, $\theta$, (approximately equal to $1-1 / B_{2}$ ) to 0.25 for seismic design of buildings, effectively requiring that $\Delta_{2 n d \text {-order }} / \Delta_{1 s t \text {-order }}$, calculated with nominal stiffness, not exceed a value of 1.33 if $P_{m f}=0$ nor 1.44 if $P_{m f}=P_{\text {story }}$ (Sabelli and Griffis, 2021).

Found in

• GENERAL STABILITY REQUIREMENTS