Abstract
The aim of this research is to develop a rational design methodology for precast, prestressed concrete piles that uses proven seismic design methodology and constitutive modeling to produce detailing requirements that are more economical yet still retain the spirit and meet the strength requirements of Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary (ACI 318R-05). Transverse reinforcement requirements specified by ACI 318-05 for compressive members penalize precast, prestressed concrete piles, which typically have large ratios of cover to diameter. These requirements can make prestressed piles uneconomical, even though they have been shown to provide good seismic performance when designed to less stringent specifications. This paper presents a simple design-chart-based methodology that uses current confined concrete models in conjunction with ACI 318-05 performance requirements to allow for lower levels of transverse reinforcement, which will allow for more economical pile construction.
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