Title:
SCG-CPAC Ultra-High Performance Fiber Reinforced Concrete Bridge
Author(s):
Sisomphon
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/23/2022
Abstract:
In 2021, the first post-tensioned UHPC bridge in Thailand has been erected at the SCG Headquarter, Bangkok. The concept of architectural design was a low arch-shape with a limited height at mid-span to no larger than about 1.25 m., while the clear span length was approximately 28 m. Owing to a small height-to-span ratio, the foundation on both sides must be encountered to extremely high lateral forces from arching action. To overcome both architectural and engineering challenges, the bridge was re-designed by using two cantilever curved girders extending horizontally from each side of abutment. Therefore, the horizontal forces acting on both abutments have been eliminated. However, as such long cantilever beams, both girders must resist a high bending moment. The SCG-UHPC material which has a compressive strength of 150 MPa was used for manufacturing the girders. Due to a high flexural strength and flexural hardening behaviors of UHPC, no rebar was used in thin slab decks, which had a thickness between 25-75 mm. With these superior performances, aforementioned UHPC offers the next breakthrough technology in the construction industry.