NLFEA Behavior of Heat-Damaged Key Joints in Precast Concrete Segmental Bridge DOI Creative Commons
Bara’a R. Alnemrawi, Rajai Z. Al‐Rousan

Buildings, Год журнала: 2025, Номер 15(11), С. 1890 - 1890

Опубликована: Май 30, 2025

The provided shear key joints are practically unreinforced due to their small size, and performance directly affects the structural behavior of segmental concrete bridge. In addition, these usually dry distributed over contact region between two connected bridge parts. current research examines effect lateral confinement pressure (1, 2, 3, 4, 5, 6) MPa elevated temperature values (23, 200, 400, 600) °C on single dried tested under concentrated static loading using Nonlinear Finite Element Analysis (NLFEA) procedure. simulation models were first validated experimental data from literature compared ultimate deflection, load, cracking propagation, failure modes ABAQUS software, where available Concrete Damage Plasticity model was utilized. Twenty-four simulated different combinations parameters included in parametric study. Results reported terms load-deflection behavior, characteristics, propagation within zone, final modes. It has been found that initial stiffness, strength all increased increasing pressure. Moreover, situation is totally when exposure exceeds 400 °C. Finally, a new formula introduced for predicting capacity after being against numerical sets, along with design codes standards. A very good agreement reached proposed mathematical equations.

Язык: Английский

Influence of Fast Freeze-Thaw Cycles on the Behavior of Segmental Bridge Shear Key Joints Using Nonlinear Finite Element Analysis DOI Creative Commons
Bara’a R. Alnemrawi, Rajai Z. Al‐Rousan

Buildings, Год журнала: 2025, Номер 15(11), С. 1892 - 1892

Опубликована: Май 30, 2025

The structural behavior of precast concrete segmental bridges is very important to investigate, and the necessity increased under effect being exposed severe environmental conditions, such as freezing thawing cycles. In this study, nonlinear finite element analysis (NLFEA) was adopted address reinforced shear keys where they were small distributed within overall depth connection region. amount lateral confinement investigated using six values (1, 2, 3, 4, 5, 6 MPa), along with different freezing-thawing cycles (0 (undamaged), 100, 200, 300, 400). Simulation accomplished direct static method, vertical loading applied. simulated models first validated experimental data from literature, captured well. Thirty NLFEA simulated, results reported in terms load-deflection characteristics detailed cracking propagation process. It found that increasing will increase strength capacity confined joint, addition ultimate deflection initial stiffness values. Furthermore, a new formula introduced for calculating compared data, results, literature models, AASHTO predictions, good matching observed, minor margin error.

Язык: Английский

Процитировано

0
NLFEA Behavior of Heat-Damaged Key Joints in Precast Concrete Segmental Bridge DOI Creative Commons
Bara’a R. Alnemrawi, Rajai Z. Al‐Rousan

Buildings, Год журнала: 2025, Номер 15(11), С. 1890 - 1890

Опубликована: Май 30, 2025

The provided shear key joints are practically unreinforced due to their small size, and performance directly affects the structural behavior of segmental concrete bridge. In addition, these usually dry distributed over contact region between two connected bridge parts. current research examines effect lateral confinement pressure (1, 2, 3, 4, 5, 6) MPa elevated temperature values (23, 200, 400, 600) °C on single dried tested under concentrated static loading using Nonlinear Finite Element Analysis (NLFEA) procedure. simulation models were first validated experimental data from literature compared ultimate deflection, load, cracking propagation, failure modes ABAQUS software, where available Concrete Damage Plasticity model was utilized. Twenty-four simulated different combinations parameters included in parametric study. Results reported terms load-deflection behavior, characteristics, propagation within zone, final modes. It has been found that initial stiffness, strength all increased increasing pressure. Moreover, situation is totally when exposure exceeds 400 °C. Finally, a new formula introduced for predicting capacity after being against numerical sets, along with design codes standards. A very good agreement reached proposed mathematical equations.

Язык: Английский

Процитировано

0