Ultimate loads for reinforced concrete square pile caps
- 1 June 2022
- journal article
- research article
- Published by Thomas Telford Ltd. in Magazine of Concrete Research
- Vol. 74 (12), 633-647
- https://doi.org/10.1680/jmacr.21.00221
Abstract
This study reports the test results for eight high-strength concrete square pile caps. The main variables are area of flexural steel bars and the configuration patterns of flexural steel bars. The test results show that the ultimate load on the pile cap increases as the total area of the flexural steel bars increases. The load-displacement curves are not significantly affected by an increase in the total area of the flexural steel bars. For a specific area of flexural steel bar, the ultimate load on pile caps in a bunched square reinforcement pattern is no greater than that for pile caps in a grid reinforcement pattern. Pile caps in a bunched square reinforcement pattern exhibit no significant mechanical advantage over pile caps in a grid reinforcement pattern. Square pile caps in a grid reinforcement pattern perform better because this pattern is more conducive to concrete casting than a bunched square reinforcement pattern. The softened strut-and-tie (SST) model more accurately predicts the ultimate load for pile caps than the ACI Sectional method for various shear span-to-depth ratios and compressive strengths of concrete. The ACI Sectional method overestimates the flexural strength of the square pile cap.Keywords
This publication has 6 references indexed in Scilit:
- Softened Strut-and-Tie Model for Shear and Flexural Strengths of Reinforced Concrete Pile CapsJournal of Structural Engineering, 2021
- Refined Three-Dimensional Strut-and-Tie Model for Analysis and Design of Four-Pile CapsACI Structural Journal, 2019
- Strength predictions of pile caps by a strut-and-tie model approachCanadian Journal of Civil Engineering, 2008
- Strength Prediction for Discontinuity Regions by Softened Strut-and-Tie ModelJournal of Structural Engineering, 2002
- Behavior and Analysis of 100 MPa Concrete Membrane ElementsJournal of Structural Engineering, 1998
- EXPERIMENTAL STUDY ON BENDING ULTIMATE STRENGTH OF FOUR PILE CAPSJournal of Structural and Construction Engineering (Transactions of AIJ), 1996