Buckling and Vibration Estimation of Girder Steel Portal Frames using the Bayesian Updating Methods

In practice, structural systems are complicated. When dealing with such systems, the use of analytical simulations is or may be impossible to apply, since problem includes many variables partial differential formulations. The stability and dynamic response structures an important aspect that must paid particular attention in order ensure safety against collapse. A physical phenomenon a reasonably straight, slender member bending laterally (usually abruptly) from its longitudinal position due compression referred as buckling. Two kinds buckling can distinguished: (1) bifurcation-type (2) deflection-amplification-type vibration, frequencies mode shapes known some methods analysis. To calculate modes, eigenvalue solved algebraic form. problems, only lowermost eigenpairs interest. highest not needed accurate discretization errors.