4:45 PM - 5:00 PM
[SCG49-12] Seismic Performance Evaluation of Reinforced Concrete Coupled Walls with Nonlinear Dynamic Analysis
Keywords:coupled wall, degree of coupling, nonlinear dynamic analysis, seismic performance
Reinforced concrete coupled wall systems are among the most effective lateral force-resisting systems during earthquakes. Compared to individual walls, coupled walls exhibit enhanced energy dissipation and increased structural stiffness. However, due to constraints in specimen size and testing costs, experimental studies on coupled walls remain limited. Consequently, numerical simulations provide a viable alternative for investigating their behavior. This study employs a frame model method using OpenSEES (Open System for Earthquake Engineering Simulation) to simulate the nonlinear behavior of reinforced concrete coupled walls. The model represents wall piers and coupling beams for beam-column elements with fiber sections. Validation against experimental results demonstrates that the model provides reasonable predictions of nonlinear behavior and damage progression.
Recognizing the degree of coupling as a key design parameter of the coupled wall, this study examines three reinforced concrete coupled wall systems with degree of coupling levels of 40%, 50%, and 60%. The analysis focuses on three planar coupled wall systems, each consisting of two rectangular wall piers connected by coupling beams. Nonlinear dynamic analysis, conducted following ASCE 7, evaluates the seismic performance of these structures under two hazard levels. The results indicate that structural responses, including story drift, wall rotation, and coupling beam chord rotation, generally satisfy the acceptance criteria. Additionally, the degree of coupling significantly influences structural behavior, with notable effects on wall rotation and beam chord rotation compared to story drift. These findings highlight the importance of the degree of coupling in optimizing the seismic performance of reinforced concrete coupled walls.
Recognizing the degree of coupling as a key design parameter of the coupled wall, this study examines three reinforced concrete coupled wall systems with degree of coupling levels of 40%, 50%, and 60%. The analysis focuses on three planar coupled wall systems, each consisting of two rectangular wall piers connected by coupling beams. Nonlinear dynamic analysis, conducted following ASCE 7, evaluates the seismic performance of these structures under two hazard levels. The results indicate that structural responses, including story drift, wall rotation, and coupling beam chord rotation, generally satisfy the acceptance criteria. Additionally, the degree of coupling significantly influences structural behavior, with notable effects on wall rotation and beam chord rotation compared to story drift. These findings highlight the importance of the degree of coupling in optimizing the seismic performance of reinforced concrete coupled walls.