Numerical Modeling of Precast Concrete Interior Beam-Column Joints with Hybrid Connection System: Model Verification and Parametric Study

GUNAWAN, ANGELINE and Wibowo, Hartanto and Chandra, Jimmy (2024) Numerical Modeling of Precast Concrete Interior Beam-Column Joints with Hybrid Connection System: Model Verification and Parametric Study. In: The 1st International Conference on Civil, Architecture, Environmental Engineering and Technology, 29-09-2024 - 29-09-2024, Surabaya - Indonesia.

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Abstract

In this study, a finite element model of precast concrete interior beam- column joints with hybrid connection system comprising unbonded post-tensioned strands and bolted steel angles was analyzed. The connection system is expected to exhibit self-centering characteristics, thus minimizing residual drift and pro- viding adequate energy dissipation during seismic events. Furthermore, this study also aims to investigate several parameters affecting the behavior of the hybrid connection system. To achieve this purpose, nonlinear analyses were conducted using two-dimensional finite element model developed in OpenSees. The model was validated with past experimental studies conducted for the hybrid connec- tion system. Subsequently, a parametric study was conducted involving eight key parameters: concrete compressive strength, concrete beam�s width, steel angle dimension, steel angle thickness, effective prestressing force ratio, column axial load ratio, and the distance of the first bolt at the column and beam leg from the joint. The analysis results show that the finite element model could simulate quite well the seismic behavior of the hybrid connection system, including the desired self-centering characteristic and sufficient energy dissipation. Moreover, the para- metric study shows that the steel angle thickness emerges as the most influential parameter, profoundly impacting moment and energy dissipation capacities.

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