The possibility of modeling the rotational cyclic behavior of column bases is examined in this work using a mechanical model based on the so-called component method. This approach, already in use in Eurocode 3 for predicting the steel joints monotonic behavior, in case of cyclic loads needs the development of the following steps: identification of the main sources of deformability, resistance and energy dissipation, characterization of the single components and assembly of a mechanical model. Therefore, in order to extend the component approach to the prediction of the rotational behavior of partial strength base plate joints, it is preliminarily necessary to define the cyclic constitutive laws of the single joint components with a mathematical model, starting from their geometrical and mechanical properties. In this paper, starting from previous studies concerning the cyclic behavior of bolted T-stubs, which is fundamental for modeling the base plate in bending, a mechanical model able to predict the cyclic behavior is proposed. Finally, the model is validated on two experimental tests carried out at the materials and structures laboratory of the University of Salerno.
CYCLIC BEHAVIOR OF EXPOSED COLUMN BASE JOINTS: EXPERIMENTAL ANALYSIS AND MECHANICAL MODELING
LATOUR, MASSIMO;RIZZANO, Gianvittorio
2015
Abstract
The possibility of modeling the rotational cyclic behavior of column bases is examined in this work using a mechanical model based on the so-called component method. This approach, already in use in Eurocode 3 for predicting the steel joints monotonic behavior, in case of cyclic loads needs the development of the following steps: identification of the main sources of deformability, resistance and energy dissipation, characterization of the single components and assembly of a mechanical model. Therefore, in order to extend the component approach to the prediction of the rotational behavior of partial strength base plate joints, it is preliminarily necessary to define the cyclic constitutive laws of the single joint components with a mathematical model, starting from their geometrical and mechanical properties. In this paper, starting from previous studies concerning the cyclic behavior of bolted T-stubs, which is fundamental for modeling the base plate in bending, a mechanical model able to predict the cyclic behavior is proposed. Finally, the model is validated on two experimental tests carried out at the materials and structures laboratory of the University of Salerno.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
