Modeling and Analysis of Seawater Sea-Sand Engineered Cementitious Composite Columns Reinforced with Fiber Reinforced Polymer Bars under Cyclic Loading
Volume Title: ICASGE2025
Paper ID : 1138-ICASGE-FULL (R1)
Authors
Abstract
The ongoing global water crisis and the depletion of fresh sand resources have necessitated the exploration of alternatives from natural environment, such as sea water and sea sand. However, these alternatives pose significant challenges in construction, as they accelerate the corrosion of steel reinforcement in structures. The rising global steel prices have further underscored the urgent need for viable alternative reinforcement materials. (FRPs) have recently emerged as a promising alternative to steel, demonstrating notable performance in structural applications. These materials are available in various types, including basalt, carbon, and glass fibers. The behavior of structural elements reinforced with FRPs varies significantly depending on the type of loading, ranging from static loads to dynamic conditions, such as cyclic loading. The integration of (ECC) into structural systems enhances the ductility of elements, enabling their use in earthquake-resistant applications and improving their performance under cyclic loads. To simulate the nonlinear behavior of ECC and conventional concrete materials, (CDP) model was employed, assuming a perfect bond at the interface between ECC and concrete. The numerical model’s validity was verified through comparisons with previously published experimental results. This study systematically evaluated the impact of the matrix type in the plastic hinge region on critical performance parameters, including failure mode, crack pattern, ultimate strength, ductility, and energy dissipation capacity of reinforced concrete columns. The findings revealed that substituting conventional concrete with ECC in the plastic hinge zone effectively mitigates local buckling of FRP bars, resulting in significant enhancements in the strength and ductility of the columns.
Keywords
Seawater Sea-Sand; engineered cementitious composite (ECC) Fiber-reinforced polymers (FRPs); The numerical model; Concrete damage plasticity (CDP) model; cyclic loading
Subjects