Seismic Drift and Shear-Strength Performance of Self-Consolidating Hybrid Fiber-Reinforced Shear Walls: A Critical Review

<jats:p>The presented critical review the seismic performance of self-compacting hybrid fiber reinforced concrete (SCC-HFRC) shear walls, addressing the structural vulnerabilities and reinforcement congestion common in traditional reinforced concrete designs. Utilizing a combination of macro-steel and micro-polypropylene fibers, the study investigates how multi-scale crack bridging mechanisms enhance the shear strength, energy dissipation, and drift capacity of structural walls. The methodology integrates large-scale cyclic testing with advanced analytical modeling based on the Modified Compression Field Theory and Concrete Damaged Plasticity. Findings demonstrate that SCC-HFRC walls maintain stable hysteretic behavior at drift levels up to 3.0%, even when traditional boundary zone confinement is reduced by as much as 75%. The hybrid fiber synergy transforms brittle failure modes, such as web crushing, into ductile responses characterized by dense networks of fine hairline cracks. By providing an independent matrix shear contribution of approximately 4.5 to 6.0 times the square root of the compressive strength, HFRC offers a robust alternative to dense steel detailing. The paper concludes that transitioning toward performance-based displacement design can significantly improve the constructability and resilience of high-rise urban infrastructure in seismic regions.</jats:p>