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Title: Post-Tension Effect of Segmented and Monolithic RPC Shell-Arch Member

Author(s): Suhaib S. Abdulhameed, Rana H. Alkerwei, and Ashraf A. Alfeehan

Publication: Structural Journal

Volume:

Issue:

Appears on pages(s):

Keywords: arch; post-tension; reactive powder concrete; segmented structure; thin shell

DOI: 10.14359/51738349

Date: 11/14/2022

Abstract:
This study adopted the concept of minimizing the materials and improving the structural system in terms of using a fiber-reinforced, prestressed member, geometrical form, and thin section along with the segmental construction. Five shallow thin Reactive Powder Concrete RPC shell arches were fabricated and tested to investigate the post-tensioning and geometric segmentation effects. The post-tension reinforcement was oriented in the direction of the curvature, and the RPC segments and the wires conduits were curved. The arches were divided into two groups; the first covered the post-tensioning effect, while the second covered the geometric segmentation. The results revealed that the post-tensioning in the shell arch improved load-carrying capacity by 3.8 times. An increase in shell-arch segmentation led to an increase in the ultimate load by (5%, 10.3%, and 12.7%) ‎for 4-PT, 6-PT, and 8-PT, respectively. The monolithic and segmented post-tensioned RPC shell arches exhibited adequately integrated behavior, including high stiffness, high capacity, and reliable interfacial bonds between segments. Segmenting showed a beneficial influence despite possible local contact due to the angular rotation of the thin segments.


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