Prestressing Force Effect on Structural Internal Forces and Stress Analysis of Prestressed Concrete Flexural Members
Properties of Pre- and Post-Tensioned Hybrid Epoxy–Cement Concrete Members for Construction Applications, wiley, ss.99-110, 2026
- Yayın Türü: Kitapta Bölüm / Araştırma Kitabı
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/9781394219384.ch6
- Yayınevi: wiley
- Sayfa Sayıları: ss.99-110
- Anahtar Kelimeler: bonded and unbonded tendons, crack control, equivalent load method, finite element modeling (FEM), flexural capacity, internal force redistribution, prestress losses, prestressed concrete beams, serviceability, structural durability, tendon eccentricity
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet
Özet
Prestressing profoundly reshapes the internal force environment of concrete flexural members, converting tensile vulnerability into structural resilience. This chapter explores how prestressing forces interact with external loads to generate unique stress distributions, internal moments, and axial forces that govern both serviceability and ultimate capacity. Fundamental mechanisms, including tendon eccentricity, equivalent load representation, and camber induction, are examined to show how prestressing modifies deflection profiles, delays cracking, and enhances flexural strength. The analysis distinguishes between bonded and unbonded tendon behavior, emphasizing how strain compatibility, global deformation, and time-dependent losses (creep, shrinkage, relaxation, and friction) alter stress states over the service life. The equivalent load method is presented as a powerful conceptual tool, translating tendon effects into external load systems for intuitive design and load balancing. Crack control and serviceability are addressed as proactive design outcomes, achieved through tendon profiling, reinforcement detailing, and advanced materials such as high-performance concretes and fiber-reinforced polymers. Finite element modeling (FEM) is highlighted as the most effective approach for simulating nonlinear stress redistribution, tendon–concrete interaction, and dynamic response under seismic and fatigue loading. Collectively, the chapter establishes a multidimensional framework for understanding prestressing effects on internal forces and stress analysis, positioning prestressed beams as a cornerstone of resilient, efficient, and durable infrastructure.