Title:
Effects of Geometric Parameters on Structural Performance of Drilled Shaft Footings
Author(s):
H. Kim, Y. Yi, R. A. Boehm, Z. D. Webb, J. Choi, J. Murcia-Delso, T. D. Hrynyk, and O. Bayrak
Publication:
Structural Journal
Volume:
122
Issue:
3
Appears on pages(s):
17-32
Keywords:
drilled shaft footing; pile cap; shear; strut-and-tie method; strut inclination; three-dimensional (3-D) strut-and-tie method (STM)
DOI:
10.14359/51745637
Date:
5/1/2025
Abstract:
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 three-dimensional (3-D) strut-and-tie modeling guidelines recently developed by the authors provided less conservative results as compared to previous recommendations and resulted in levels of accuracy consistent with those of other shear design procedures adopted in code provisions.