Title:
Prepublished: Effects of Geometric Parameters on Structural Performance of Drilled Shaft Footings
Author(s):
Hyunsu Kim, Yousun Yi, Ryan A. Boehm, Zachary D. Webb, Jongkwon Choi, Juan Murcia-Delso, Trevor D. Hrynyk, and Oguzhan Bayrak
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
3D STM; drilled shaft footing; pile cap; shear; strut-and-tie method; strut inclination
DOI:
10.14359/51745637
Date:
2/11/2025
Abstract:
This paper presents results obtained from an experimental study focused on the impacts of geometric design parameters on the structural performance of drilled shaft footings. Large-scale tests were conducted on specimens subjected to uniform column compression and constructed with different geometric conditions permitting the examination of varied strut inclination, shaft diameter, and footing depth. The experimental results obtained confirmed that footing strength was highly dependent on strut inclination while shaft diameter affected the ultimate damage pattern. Strength calculations based on 3D strut-and-tie modeling guidelines recently developed by the authors provided less conservative results than previous recommendations and resulted in levels of accuracy consistent with those of other shear design procedures adopted in code provisions.