Strength and Ductility of Hybrid Steel and FRP Reinforced Concrete Sections Subjected to Combined Axial and Bending Regime

This folder contains the numerical data regarding the study of Hybrid Reinforced Concrete (HRC) Sections reinforced with Steel and Glass Fiber Reinforced Polymer (GFRP) Bars. The uploaded materials include the derivation of N-M Interaction Diagrams and the analysis of Moment-Curvature relationships, focusing on the combined mechanical behavior of traditional steel and GFRP reinforcement at Ultimate Limit State (ULS). A comprehensive parametric analysis was conducted to evaluate the influence of varying the total hybrid mechanical reinforcement ratio ω_h and the hybridization parameter R, as well as the effects of different normalized axial force levels. The study quantifies the structural performance of these HRC sections through an assessment of sectional ductility and energy dissipation capacity, providing insights into their viability for resilient structures. The Moment-Curvature diagrams report design bending moment on the ordinate and nominal curvature on the abscissa. The material properties and design constraints were calculated following a dual regulatory framework: European Approach: Material characteristics were determined according to Eurocode 2 (for concrete and steel) and CNR-DT 203 R1/2026 (for FRP reinforcement). American Approach: Calculations were performed in accordance with ACI 318-25 and ACI 440.11-22 guidelines. This research was developed at the Polytechnic University of Turin in collaboration with Masera Engineering Group S.r.l.本文件夹收录了针对钢-玻璃纤维增强聚合物（Glass Fiber Reinforced Polymer，GFRP）筋增强混合钢筋混凝土（Hybrid Reinforced Concrete，HRC）截面开展研究的数值数据。上传资料包含轴力-弯矩（Normal-Moment，N-M）交互作用曲线的推导过程，以及弯矩-曲率（Moment-Curvature）关系分析，重点聚焦传统钢筋与GFRP筋在极限状态（Ultimate Limit State，ULS）下的协同力学性能。 本研究开展了全面的参数化分析，用以评估混合筋总力学配筋率ω_h、混合参数R的变化带来的影响，以及不同归一化轴力水平的作用效果。本研究通过评估截面延性与耗能能力，量化了此类HRC截面的结构性能，为其在韧性结构中的应用可行性提供了理论参考。 弯矩-曲率曲线以纵坐标表示设计弯矩，横坐标表示名义曲率。 材料属性与设计约束条件的计算遵循双重规范框架： 欧洲规范体系：材料特性参数依据《Eurocode 2（混凝土与钢筋）》及《CNR-DT 203 R1/2026（FRP筋设计规范）》确定。 美国规范体系：计算工作依据《ACI 318-25》与《ACI 440.11-22》导则开展。 本研究由都灵理工大学与Masera工程集团（Masera Engineering Group S.r.l.）合作开展。