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Flexural Behavior of RC Continuous Slabs Strengthened by External Prestressing Systems
Demolishing deteriorated structures is usually costly and time consuming in most areas around the world. Therefore, strengthening and rehabilitation of structures are considered as first options when dealing with decayed buildings. Strengthening of Reinforced Concrete (RC) structures externally is usually faster compared with other traditional strengthening techniques. Consequently, a comprehensive investigation has been initiated to study the flexural behavior of RC continuous slabs strengthened externally with prestressed steel cables and CFRP laminates. The proposed techniques have significant advantages in increasing the strength and stiffness of RC members while lowering the construction cost and time. Moreover, the prestressing results in closure of the concrete cracks and partial retaining of the member deflection, which enhances the overall serviceability of the structures. In this experimental program, nine half-scale RC one-way continuous two-span slabs were tested until failure to investigate the flexural behavior while using different prestressing materials (i.e. steel strands, and CFRP laminates) and different strengthening schemes. Comparison between the specimens’ behavior is introduced to evaluate the most effective strengthening material and profile while considering the installation cost and time. The results showed that the maximum load of the strengthened slabs has increased significantly due to the application of external prestressing steel strand and CFRP laminates up to 96% and 53%, respectively.
Flexural Behavior of RC Continuous Slabs Strengthened by External Prestressing Systems
Demolishing deteriorated structures is usually costly and time consuming in most areas around the world. Therefore, strengthening and rehabilitation of structures are considered as first options when dealing with decayed buildings. Strengthening of Reinforced Concrete (RC) structures externally is usually faster compared with other traditional strengthening techniques. Consequently, a comprehensive investigation has been initiated to study the flexural behavior of RC continuous slabs strengthened externally with prestressed steel cables and CFRP laminates. The proposed techniques have significant advantages in increasing the strength and stiffness of RC members while lowering the construction cost and time. Moreover, the prestressing results in closure of the concrete cracks and partial retaining of the member deflection, which enhances the overall serviceability of the structures. In this experimental program, nine half-scale RC one-way continuous two-span slabs were tested until failure to investigate the flexural behavior while using different prestressing materials (i.e. steel strands, and CFRP laminates) and different strengthening schemes. Comparison between the specimens’ behavior is introduced to evaluate the most effective strengthening material and profile while considering the installation cost and time. The results showed that the maximum load of the strengthened slabs has increased significantly due to the application of external prestressing steel strand and CFRP laminates up to 96% and 53%, respectively.
Flexural Behavior of RC Continuous Slabs Strengthened by External Prestressing Systems
Lecture Notes in Civil Engineering
Walbridge, Scott (editor) / Nik-Bakht, Mazdak (editor) / Ng, Kelvin Tsun Wai (editor) / Shome, Manas (editor) / Alam, M. Shahria (editor) / El Damatty, Ashraf (editor) / Lovegrove, Gordon (editor) / AbuGazia, Mohamed (author) / El-Sefy, Mohamed (author) / El-Kateb, Mahmoud (author)
Canadian Society of Civil Engineering Annual Conference ; 2021
Proceedings of the Canadian Society of Civil Engineering Annual Conference 2021 ; Chapter: 23 ; 265-276
2022-06-17
12 pages
Article/Chapter (Book)
Electronic Resource
English
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