Phenomenological Modeling of Steel Braces under Cyclic Loading

摘要

The report introduces a refined phenomenological type analytical model for simulating the inelastic buckling behavior of steel braces. The cyclic buckling behavior of braces is simulated by pre-defined straight line segments along with simple rules regarding buckling load deterioration, plastic growth, and so on. The model achieves consistent asymptotic behavior, even for large axial brace shortenings, and extends input and output options available to the user. The element utilizes the advanced capabilities of the recently developed DRAIN-2D2 program, which performs dynamic inelastic structural analyses of two-dimensional structural systems subjected to static loads and seismic base excitations.