Behavior Of Column Base Research Articles

An Overview on Effects of Geometric Parameters in Column Connection Behavior via Finite Element Method

Background/Objectives: In this research, behavior of column base with box-shaped column under static loads has been examined via finite element method. Methods/Statistical Analysis: Column connection to column base and column base connection to foundation have been modeled with details, and the behavior of connection in form of moment-curvature diagram has been displayed by changing the parameters including column base plate thickness, diameter of anchor rod, axial load, distance between anchor rods, eccentricity of the column in the direction y, x, connection behavior in form of moment-curvature diagram. Results: The results indicate that the more column base plate thickness increases, in addition to increasing ultimate resisting moment, joint stiffness in the elastic curve will increase. Further, by decreasing diameter of anchor rod, rigidity of connection will increases and the connection behavior will get close to the state of changing the rigid forms. By decreasing the distance between anchor rods, joint stiffness and ultimate moment resistance will increase and formation will decrease. Keywords: Anchor Rod, Column Base Plate, Finite Element Method, Moment-Curvature Diagram, Parametric Study

Finite Element Analysis for Cyclic Behavior of Exposed Type of Column Bases Subjected to Tensile Force

This paper presents the results of analytical studies on exposed type of column bases, which were carried out to investigate the effect of tensile force on cyclic behavior of column bases. The cyclic behavior of the column bases subjected to tensile force ratio n > -0.4 is stable. While, in the column bases subjected to tensile force ratio n < -0.6, the deformation of base columns progresses with increasing severely under a constant amplitude.

露出型柱脚を有する低層剛接骨組の地震時挙動

Column bases are most important parts in strength and deformation capacity in the estimate of seismic resistance of steel framed structures. A lot of research works has been made, however, the relationship between the structural behavior and the behavior of column bases has not been made clear yet. In this paper, the analytical model of fish-bone of frame is applied and the experimental results of column bases is introduced. Five-storied weak-beam type frames are taken. The bottom of columns is equipped with actual column bases. Damage distribution and deformation of the column bases are analyzed in terms of the intensity of seismic input. As a references, two type of idealized fundamental frames are introduced. Based on the result of analysis, the design method of column bases for low-rise steel frames is summarized.