INFLUENCES OF CURVE MOMENT ROTATION MODELS IN STATIC AND DYNAMIC ANALYSIS OF STEEL STRUCTURES WITH BEAM-COLUMN AND COLUMN-BASE SEMI-RIGID CONNECTIONS

Cladilson Nardino¹; Vinícius Hanser de Souza¹; Marcos Arndt¹

¹ UFPR - Universidade Federal do Paraná

doi:10.20906/CPS/CILAMCE2017-0296

Resumo

An important idealization admitted in the structural analysis is the connections between the elements. Beam-column and column-base joints are usually assumed to be either perfectly rigid or ideally pinned in relation to the requesting efforts. Focusing on the behavior of the connections, experiments have demonstrated that connections classified between the extremes of fully rigid connections and frictionless pinned connections, known as semi-rigid connections, behave non-linearly. This means that a finite degree of joint flexibility exists in these connections, representing the semi-rigid behavior. This real connection behavior is usually modeled by null length rotational springs with moment-rotation relations described by several mathematical models presented in the literature. Thus, the main objective of this paper is to analyze the influence of different non-linear moment-rotation formulations in static and dynamic analysis of steel structures with beam-column and column-base semi-rigid connections. The results obtained by non-linear models and multilinear models of beam-column connections are also compared in order to verify their efficiency. The analyzes were performed using the software NIDA (Non-linear Integrated Design and Analysis) which considers the hybrid element proposed by Chan & Chui (2000) formed by coupling the connection stiffness in the element global stiffness matrix.

Palavras-chave: Semi-rigid connection ; Column-Base connection; Non-linear analysis; Multi-linear model