ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Shear Critical Deep Beams with Embedded Functionally Graded Concrete Struts

Author(s): Jacob Yager, Neil A. Hoult, Evan C. Bentz, and Joshua Woods

Publication: Structural Journal

Volume: 119

Issue: 6

Appears on pages(s): 245-257

Keywords: deep beams without transverse reinforcement; distributed fiberoptic strain sensing; fresh-on-fresh concrete casting; functionally graded concrete (FGC); low-carbon concrete; low-cement content concrete; strut-and-tie model (STM)

Date: 11/1/2022

Abstract:
In this research, novel functionally graded concrete deep beams without transverse reinforcement for transfer girder applications were constructed with varying shaped embedded high-strength struts surrounded by low-cement content concrete. The cement content in the low-cement content concrete also varied, with a maximum total beam cement reduction of 47% compared to the control. The placement method also varied, further revealing issues with fresh-on-hardened concrete casting. The beams were tested in three-point bending and monitored using distributed fiber-optic sensors (DFOS) and digital image correlation. The results of the tests revealed that diagonal-shaped embedded struts designed for three-point bending had the highest load capacity increase of up to 26%. However, using shapes not compatible with three-point bending resulted in load capacity decreases. DFOS also enhanced the understanding of strut-and-tie mechanisms, allowing for the visualization of the strain distribution in struts and quantifying formations of the strut and tie.


ALSO AVAILABLE IN:

Electronic Structural Journal



  

Please enter this 5 digit unlock code on the web page.