Abstract
Traditional rigid column base connections are damaged to different degrees after an earthquake and the damage is generally nonrecoverable. Thus, the cost of repairing or dismantling is quite high. A new type of slip-friction column base connection is proposed in this paper, which aims to replace the yielding energy dissipation of the traditional column base connection by the sliding friction energy dissipation between the arc endplates, thus achieving the design objective of damage-free energy dissipation. Finite element simulation was conducted to study the hysteretic performance of the proposed connections considering different axial compression ratios. The research indicates that both kinds of the proposed connections show good energy dissipation behavior and the increase of axial compression force can increase the energy dissipation ability. It also shows that the two kinds of connections can achieve the objective of damage-free energy dissipation. For the proposed connection, future research is still needed such as corresponding tests in the laboratory, the effect of the connection on the whole structure, and the re-centering systems for the connections.
Highlights
Introduction and BackgroundSteel structure has been widely used in high-frequency seismic regions because of its excellent performances in previous earthquakes
The main purpose of this paper is to study the seismic behavior of a steel column with the Objectives proposed slip-friction connections to check the ability of damage-free energy dissipation
asymmetric friction connection (AFC), especially when the axial compression force is applied to the column; All the components of the connections except for some of the bolts in the convex connection are under elastic state during the whole loading process, which means that the two kinds of connections can achieve the objective of damage-free energy dissipation
Summary
Introduction and BackgroundSteel structure has been widely used in high-frequency seismic regions because of its excellent performances in previous earthquakes. The test results show that the yielding of column base connections will produce residual deformation at the top of the column, and the axial shortening due to the yielding of column base can cause undesirable effects in the building during earthquake excitation [6]. It is difficult for the building structure to recover to the initial vertical state when yielding occurs. Akira et al [7] pointed out that whether the damaged parts are repaired or dismantled after an earthquake, it will cause great waste of resources and social labors
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