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Flexural behaviors of concrete beams under monotonic and cyclic loadings
Highlights: A transition point where nonlinear deformation occurred before cracking load was proposed. Empirical formulas for predicting concrete flexural behaviors were proposed. A hysteresis loop model was proposed to predict the hysteretic behaviors of the beams under cyclic loading.
Abstract In order to study the flexural behaviors of concrete beams under monotonic and cyclic loadings, three-point bending tests were performed on center-notched beams made of normal strength concrete (NSC) and high strength concrete (HSC) respectively. From the P-CMOD curves of the beams, it was found that nonlinear deformation occurred before the cracking load. The P-CMOD curves were further normalized to characterize the flexural performance of the beams by a nominal stiffness EI R. Based on the normalized EI R-CMODR curves, formulas for predicting the flexural behaviors of the beams were proposed. With these formulas, the P-CMOD curve of a specimen can be estimated if only the specimen dimension, E, P max and CMODun are known. Finally, the P-CMOD hysteresis curve was analyzed, a hysteresis loop model was proposed, and the hysteresis curve of XFEM was adjusted with Python to make it closer to the experimental results.
Flexural behaviors of concrete beams under monotonic and cyclic loadings
Highlights: A transition point where nonlinear deformation occurred before cracking load was proposed. Empirical formulas for predicting concrete flexural behaviors were proposed. A hysteresis loop model was proposed to predict the hysteretic behaviors of the beams under cyclic loading.
Abstract In order to study the flexural behaviors of concrete beams under monotonic and cyclic loadings, three-point bending tests were performed on center-notched beams made of normal strength concrete (NSC) and high strength concrete (HSC) respectively. From the P-CMOD curves of the beams, it was found that nonlinear deformation occurred before the cracking load. The P-CMOD curves were further normalized to characterize the flexural performance of the beams by a nominal stiffness EI R. Based on the normalized EI R-CMODR curves, formulas for predicting the flexural behaviors of the beams were proposed. With these formulas, the P-CMOD curve of a specimen can be estimated if only the specimen dimension, E, P max and CMODun are known. Finally, the P-CMOD hysteresis curve was analyzed, a hysteresis loop model was proposed, and the hysteresis curve of XFEM was adjusted with Python to make it closer to the experimental results.
Flexural behaviors of concrete beams under monotonic and cyclic loadings
Li, Hao (author) / Chen, Hongniao (author) / Xu, Yingjie (author) / Shen, Jie (author)
2022-11-08
Article (Journal)
Electronic Resource
English
Monotonic and Cyclic Behaviors of Reinforced Recycled Aggregate Concrete Beams
| Springer Verlag | 2024
Monotonic and Cyclic Behaviors of Reinforced Recycled Aggregate Concrete Beams
| Springer Verlag | 2024