Seismic behavior of innovative precast hybrid steel-concrete beam-column connections
Journal
Engineering Structures
Journal Volume
342
Start Page
120921
ISSN
0141-0296
Date Issued
2025-11-01
Author(s)
Abstract
This study introduces a new precast beam-column subassembly designed to facilitate construction and reduce reinforcement congestion within the joint. The proposed beam-column subassembly features a hybrid joint, incorporating steel cover plates as confinement reinforcement and high strength steel bars as longitudinal reinforcement to enhance both efficiency and structural performance. In this study, the structural performance of four large-scale exterior beam-column subassemblies —two with conventional RC joints and two with hybrid joints —was evaluated under cyclic loading. Results from the cyclic loading tests showed that the steel cover plates in hybrid joints effectively provided both confinement and shear strength, preventing joint shear failure. However, the steel cover plates caused a significant stiffness differential at the steel-concrete interface, leading to early concrete crushing and longitudinal rebar buckling, which resulted in strength reduction. Despite this, the proposed beam-column subassemblies with the hybrid joint exhibited satisfactory plastic hinge rotation capacity and energy dissipation.
Subjects
Beam-column joint
Cyclic loading test
High strength steel
Hybrid joint
Precast construction
Steel-concrete composite
SDGs
Publisher
Elsevier BV
Type
journal article