Analysis and Design of Prestressed Concrete for Torsional Members
Properties of Pre- and Post-Tensioned Hybrid Epoxy–Cement Concrete Members for Construction Applications, wiley, ss.137-145, 2026
- Yayın Türü: Kitapta Bölüm / Araştırma Kitabı
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/9781394219384.ch9
- Yayınevi: wiley
- Sayfa Sayıları: ss.137-145
- Anahtar Kelimeler: advanced materials, box sections, compatibility torsion, cracking torque, equilibrium torsion, hybrid reinforcement, prestress effects, prestressed concrete torsional members, reinforcement detailing, shear–torsion interaction, space-truss analogy, structural resilience
- İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet
Özet
Prestressed concrete torsional members embody one of the most complex yet essential aspects of modern structural engineering, where prestressing not only counteracts tensile weakness but also reshapes the internal stress field under combined actions. This chapter provides a comprehensive exploration of torsional behavior, analysis, and design in prestressed systems. The discussion distinguishes between equilibrium torsion—arising from static load requirements—and compatibility torsion—developing in redundant systems to maintain deformation continuity. Prestressing is shown to delay torsional cracking, enhance stiffness, and increase ultimate torque capacity by mobilizing compression in concrete and stabilizing shear flow mechanisms. Failure modes are examined through the space-truss analogy, highlighting the interaction of diagonal tension, compression struts, and reinforcement detailing. Comparative analysis of rectangular and box sections underscores the geometric influence on torsional strength, with closed thin-walled sections offering superior performance. The chapter also integrates design strategies for combined bending, shear, and torsion, emphasizing interaction equations, reinforcement detailing, and ductility provisions in line with modern codes. A numerical design example illustrates practical application, demonstrating how prestressing improves cracking torque, reduces torsional rotations, and ensures safe performance under complex load combinations. Emerging research on hybrid reinforcement, nanomodified concretes, and advanced FRP systems is also discussed, pointing toward sustainable and resilient torsional design solutions. Collectively, the chapter establishes a holistic framework for analyzing and designing prestressed torsional members, ensuring strength, serviceability, and durability in contemporary infrastructure.