DFI - PFSF Piling & Ground Improvement Conference 2022 Proceedings, (DFI and PFSF)
The Importance of Tension Softening (of Concrete) in Modelling of Tension Piles
Qingwei Joshua Ong and Siew Ann Tan
Tension piles, also known as uplift or anchor piles, are necessary to resist uplift forces that might cause structural distress. In excavation projects, most uplift forces are developed because of hydrostatic pressures, and so tension piles are subjected to a great deal of tensile forces. Most current methods of design for tension piles completely neglect the tensile strength contribution of concrete, relying only on the steel members to carry the tensile stresses, resulting in an overly conservative design. The stress-strain behavior of the composite material of concrete and steel must be considered for a realistic simulation of tension piles. This paper will examine a case on a tension bored pile in typical soft clay to demonstrate the importance of considering the tension strength and tension softening of the concrete.
|article #3830; publication #1076 (IC-2021)|