Influence of evaluation methods used to perform the performance of special steel structures

The seismic evaluation of structures has been studied in the time in different ways, experimentally, using analytical methods and after real events. Due to the cost involved in carrying out experiments, and the rarity of seismic events, analytical methods are the most used to conduct research and perform the seismic evaluation of structures. The analytical method consists in representing the structure using mathematical models the same that may include properties to perform linear and non-lineal analysis. The most used analytical methodologies to perform non-lineal analysis are to model inelas in concentrated way (phenomenological models) or model inelasticities in a distributed way (fiber models). The first concentrates the non-linear effects of the material at the ends of beams and columns (in the case of special porches), on the other hand the fiber models require explicit modeling of the sections discretized in fiber the same ones that are assigned a behavior effort of the material. These two types of models depend on the complexity of the material assigned to the localized non-linearity and the material assigned to the fibers. In this research, the non-linear performance of structures of 2.4, 8, 12, 20 special steel floors is evaluated using five different non-linear mathematical models: 3 phenomenological models and 2 fiber models. The objective of this study is to evaluate the performance of these structures for each mathematical model. The performance of the structures will be evaluated by deformations and accelerations of floor.