About the author ⁄ Timothy W. Mays, Ph.D., P.E.

Timothy W. Mays is a Professor of Civil Engineering at The Citadel in Charleston, SC. Dr. Mays previously served as Executive Director of the Structural Engineers Associations of South Carolina and North Carolina. He currently serves as NCSEA Publications Committee Chairman. Timothy can be reached at mayst1@citadel.edu.

Axial Load Limits for Prestressed Piles

Reconciling the 2018 IBC, ACI 318-19, and PCI’s 2019 Report

This is a follow-up to a previous STRUCTURE magazine article titled Rethinking Seismic Ductility (March, 2016). The previous article presented possible shortcomings associated with the International Building Code (IBC) prescriptive seismic design philosophy used for both auger cast piles and prestressed piles to contrast foundation ductility design with that used for other structural elements. It also provided a side-by-side comparison of design and performance issues associated with auger cast piles and prestressed piles. …

Jan, 2021 By John C. Ryan, Ph.D., P.E. and Timothy W. Mays, Ph.D., P.E. In Building Blocks Comments 0

Rethinking Seismic Ductility

A Critical Comparison of Auger Cast and Prestressed Piles in Areas of Moderate to High Seismicity

Design of auger cast and prestressed concrete pile elements supporting building structures in Seismic Design Categories A through F is covered in Chapter 18 of the 2015 International Building Code (IBC). It is anticipated that subsequent additions of the IBC will no longer contain these provisions and ACI 318 is currently being revised to include provisions for these elements beginning in 2019. …

Mar, 2016 By Timothy W. Mays, Ph.D., P.E. In Articles, Building Blocks Comments 0

New Design Guide for Pile Caps

Although pile caps are an important structural element, they are generally neglected in textbooks on structural design. This article is intended to offer a brief introduction to the new CRSI/DFI (Concrete Reinforcing Steel Institute/Deep Foundations Institute) Pile Cap Design Guide referred to henceforth as the Guide. The Guide was authored by Dr. Timothy W. Mays, P.E. with The Citadel. …

Dec, 2015 By Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI and Timothy W. Mays, Ph.D., P.E. In Articles, Structural Practices Comments 1

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