Seismic Performance of Prestressed Concrete Beam and Shear Wall with Innovative Epoxy Resin and Carbon Quantum Dots
Properties of Pre- and Post-Tensioned Hybrid Epoxy–Cement Concrete Members for Construction Applications, wiley, ss.147-159, 2026
- Yayın Türü: Kitapta Bölüm / Araştırma Kitabı
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/9781394219384.ch10
- Yayınevi: wiley
- Sayfa Sayıları: ss.147-159
- Anahtar Kelimeler: carbon quantum dots (CQDS), CFRP retrofitting, curtain wall connections, drift capacity, earthquake engineering, energy dissipation, epoxy nanocomposites, prestressed concrete beams, seismic resilience, self-sensing adhesives, shear walls, smart infrastructure
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet
Özet
Seismic resilience of prestressed concrete structures remains a pressing challenge, particularly for beams and shear walls that are prone to brittle shear failure, debonding, and limited energy dissipation under cyclic loading. This chapter introduces a novel nanocomposite approach: epoxy resin modified with carbon quantum dots (CQDs), applied both to structural retrofitting of prestressed beams and to nonstructural curtain wall connections. CQDs, synthesized via a green hydrothermal route, impart enhanced toughness, adhesion, and crack resistance to the epoxy matrix while also enabling fluorescence-based self-sensing. Experimental programs on full-scale prestressed beams demonstrated that CQD-modified epoxy bonding prevented premature Carbon Fiber-Reinforced Polymer (CFRP) debonding, shifted failure modes toward ductile rupture, and increased drift capacity by 30% compared to conventional retrofits. Curtain wall connection tests revealed ∼35% higher energy dissipation and ∼ 50% greater stiffness when CQD-modified epoxy was used, with the added benefit of real-time damage detection through piezochromic fluorescence. Integrated system analysis confirmed that the dual application of CQD-modified epoxy improves both structural ductility and façade integrity, enabling immediate post-earthquake occupancy and reducing downtime. By merging nanotechnology with seismic engineering, this chapter establishes CQD-modified epoxy as a multifunctional material that enhances strength, durability, and smart monitoring capabilities, marking a paradigm shift toward intelligent, resilient infrastructure.