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Title: | A Super Element Beam-Column Joint Model Under Dynamic Loading |
Authors: | Adom-Asamoah, Mark Osei Banahene, Jack |
Keywords: | beam-column joint reinforced concrete frames pushover analysis nonlinear time history analysis |
Issue Date: | 17-Jul-2018 |
Abstract: | Several analytical beam-column joint models with varying complexities have been proposed to
give reliable estimate of joint response under seismic excitation. The inelastic seismic response
of a super element consisting of 13 one-dimensional components which represents three types
of inelastic mechanisms is evaluated. Its seismic performance is assessed at reverse quasi static
loading of tested reinforced concrete joint assemblage, monotonic nonlinear pushover analysis
(NPA) and nonlinear time history analysis (NTHA) with results compared to the conventional
approach of modeling the beam-column connection as rigid. Results from reverse quasi static
loading of sub-assemblages emphasized the importance of including joint flexibility, with the
super element joint model closely matching the experimental response in terms of peak shear
strength, pinching behaviour and amount of hysteretic energy dissipation. NPA results of a case
study hypothetical frame also revealed that including joint flexibility may lead to a reduced initial
stiffness and maximum base shear when compared with the conventional approach. NTHA
revealed that explicit representation of the joint region using the super element approach may
not change the dominant mode of failure but however may significantly impact the estimated
average drift responses. One notably observation, is the rather increased drift responses for the
rigid joint modeling approach when subjected to extreme ground motion intensities, which is
being attributed to the fact that framing members may be subjected to large strain hardening at
such levels of ground shaking. |
Description: | Proceedings of ESTE 2015 conference |
URI: | http://hdl.handle.net/123456789/11316 |
Appears in Collections: | College of Engineering
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