Limit State Analysis of Seismically Excited 3D R/C Beam Bearing Structures

摘要

In the paper a calculation model is presented which enables the analysis of seismically excited 3d r/c frame works using non-linear optimization algorithms. In this connection as criterion for evaluation the ultimate limit state (shakedown state) the adaptive load factor pA is defined. The plasticity conditions of a cross section as function of the elastic internal stress-state can be described linear as well as non-linear. With an example of a 3d structure will be quantified the influence both of the formulation of the plasticity conditions and of the kind of elastic dynamic determination of internal stress state on the adaptive ultimate load.