Title:
Non-Rigid Formwork Systems for Reinforced Concrete Structures
Author(s):
Sadler
Publication:
Web Session
Volume:
ws_S23_Sadler.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
4/2/2023
Abstract:
This research investigated the use of flexible formwork in casting reinforcing concrete beams cast. Traditionally formworks have been made of rigid materials like steel or wood. The results are prismatic members, which are not optimized for material usage but only for simplicity in construction. Using flexible forms, more optimized shapes can be created. Beams cast using flexible formwork can reduce material usage by up to 30 percent while maintaining the same strength. To construct these beams, different fabrics were tested with the formwork rigging, which forces the concrete into the desired shape. Then 3D-printed members were placed into the fabric, which helps with shape optimization. A self-consolidating concrete was used in casting the beam to minimize vibration during operations and hydrostatic pressure to engage the fabric in tension. Beams were tested in a four-point bending manner. Data were collected to compare the strength and failure modes of this fabric beam to a prismatic control beam. Results show that traditional reinforcement is a challenge with complex shapes generated by the flexible formwork and results in changes in the failure mode. This research presents the mechanical behavior of the reinforcement and the required adjustment for a ductile behavior.