For a study of the performance during seismic events of deep slender column sections within a steel special moment frame structure (where beams, columns and beam-column
connections are designed to be more earthquake resilient).
The model employs a force-based nonlinear fibre beam-column
element using OpenSees.
In the case of steel moment-frame buildings, the nonlinear behavior of beam-column
connections significantly affects the dynamic response under earthquakes since connection regions are one of the primary sources of hysteretic damping.
Since the 1960's, numerous experimental tests and analytical studies have been conducted to investigate the performance of reinforced concrete (RC) beam-column
connections subjected to lateral earthquake loading.
The scientists performed 16 beam-column
sub-frame tests with different connection configurations under lateral loads.
Such structural members are termed an additionally restrained beam-column
Simulated seismic load tests on RC interior and exterior beam-column
joints were conducted by Hakuto et al.
The RC beam, column, and beam-column
joint models are taken from computer models developed by Suthasit and Warnitchai [5,6] which are able to simulate complex behavior of GLD buildings including brittle failures.
There have been many catastrophic failures reported in the past earthquakes, in particular with Turkey and Taiwan earthquakes occurred in 1999, which have been attributed to beam-column
behaves as a spring combined with a Negative-Stiffness mechanism.
The horizontal stiffness of the beam columns is reduced by the beam column effect--a beam-column
behaves as a spring combined with an NSM.
Some cracks formed also at the beam-column
interface due to slippage of the (smooth) column reinforcing bars within the joint.