Simplified Seismic Collapse Assessment of Generic Frame Structures Subjected to Pdelta and Material Deterioration

Abstract

Abstract. In this paper the influence of material deterioration on the seismic collapse capacity of PDelta vulnerable frame structures is quantified. The main objective is to reveal and to validate the range of applicability of the proposed equivalent single-degree-of-freedom (ESDOF) system for assessment of the global collapse capacity. This is achieved through comparison of the median collapse capacity of PDelta vulnerable generic frame structures that exhibit material deterioration in strength and stiffness with outcomes of the corresponding ESDOF system based on the derived transformation rules. Sets of planar generic frame structures are compiled varying the governing structural parameters for seismic collapse independently. In all cases, the collapse capacity is calculated using incremental dynamic analysis. Record-to-record variability of the collapse capacity is studied using a set of ordinary earthquake records compiled in FEMA-P695.