214 R. Astroza et al. Fig. 24.2 Pseudo-code of the proposed dual adaptive filtering approach for FE model updating sections are discretized into fibers. Columns’ webs into 6 ×1 fibers across their length and width, respectively, and each column’s flange in a single fiber. Beams’ webs into 16 ×1, 14 ×1 and 11 ×1 fibers across their length and width, at the second, third and roof level, respectively, and each beam’s flange in a single fiber. Further details of the structure and nonlinear FE model can be found in [17]. The Giuffre-Menegotto-Pinto (MGMP) constitutive model [22] is employed to model the nonlinear uniaxial stress-strain behavior of the steel fibers. This material model is defined by four primary parameters (which will be considered unknown and estimated), corresponding to modulus of elasticity (Es), initial yield stress (fy), a parameter defining the curvature of the elastic to plastic transition during the first cycle (R0) and strain-hardening ratio (b) (see Fig. 24.3b). Two different sets of
RkJQdWJsaXNoZXIy MTMzNzEzMQ==