Before revision: Specifically, The secant stiffness of the connection is compared to the rotational stiffness of the connected member as follows, in which L and EI are the length and bending rigidity, respectively, of the beam.
After revision: Ks = Ms/θswhere Ms = moment at service loads, kip-in (N-mm) θs = rotation at service loads, radsSpecifically, The secant stiffness of the connection is compared to the rotational stiffness of the connected member as follows, in which L and EI are the length and bending rigidity, respectively, of the beam.