Jordan Journal of Civil Engineering

Paper Detail

Inelastic Dynamic Behaviour of Simply Modeled Explicit and Implicit Non-Ductile RC Beam-Column Joints

Volume 11, No. 4, 2017
Received: 2017/08/27, Accepted:

Authors:

Mark Adom-Asamoah; Jack Osei Banahene;

Abstract:

This study focuses on evaluating the responses of five variants of simple implicit and explicit beam-column joint modeling schemes. A non-linear open-source finite element platform, OpenSees, was employed in performing the structural analysis of a beam-column joint sub-assemblage and a reinforced concrete frame building subjected to pseudo-static and dynamic analysis, respectively. The explicit rotational spring models with rigid links (SLM) and without rigid links (SM) were fairly able to estimate the hysteresis behaviour accurately, whilst the explicit ACI/ASCE joint model (ASCEM) was conservative in predicting the joint shear strength and post peak drift capacity, in addition to its inability to capture the stiffness and strength degradation accurately. The implicit centerline models (CLM and CLRBM) were unable to mimic the energy dissipation as well as the induced flexibility of the non-ductile joint imposed on the system. The explicit joint models (CM, CLM and ASCEM) generally observed an incremental shift in the modal periods of vibration, whilst for the implicit joints, there was no change in individual modal periods of vibration and the associated mass participations. The SLM, ASCEM and CLRBM joint models experienced fairly the same peak drift and rotational angle distribution along the story levels, whilst the other models were outliers.

Keywords:

Beam-column joint, Reinforced concrete frames, Bond slip, Shear deformation