About the author ⁄ Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI

Mike Mota, Ph.D., P.E., F.ASCE, F.ACI, is the Vice President of Engineering for the Concrete Reinforcing Steel Institute (CRSI). Mike is an active member of several ACI and ASCE committees, Member of ACI 318 and 318 sub B and sub R, Chair of ACI Committee 314 on Simplified Design of Concrete Buildings, serves on the Board of Directors of the Concrete Industry Board of New York City/NYC ACI Chapter and is a past member of the editorial board of STRUCTURE magazine. He may be reached at mmota@crsi.org.

Vibration Excitations

Part 2: How to Select a Reinforced Concrete Floor System

Reinforced concrete floor systems provide adequate resistance to vibration caused by a variety of sources because of their inherent mass and stiffness. General information on sources of vibration and acceptance criteria for typical office and residential occupancies was covered in Part 1 (STRUCTURE, September 2017). Vibration characteristics of reinforced concrete flat plate and wide-module joist systems were also discussed in Part 1, with useful guidelines to quickly ascertain when these reinforced concrete systems are adequate for various types of vibration excitations. …

Oct, 2017 By David A. Fanella, Ph.D., S.E., P.E., F.ACI, F.ASCE, F.SEI and Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI In Structural Analysis Comments 0

Vibration Excitations

Part 1: How to Select a Reinforced Concrete Floor System

Vibration analysis has become more commonplace in everyday practice. In office environments, the need for longer spans continues to increase. Open spaces, with minimal or no partitions and no filing cabinets, are becoming even more prevalent (typical electronic office), which translates to less damping to counteract vibrational effects. …

Sep, 2017 By David A. Fanella, Ph.D., S.E., P.E., F.ACI, F.ASCE, F.SEI and Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI In Structural Analysis Comments 2

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

Vibration of Reinforced Concrete Floor Systems

It is generally perceived that vibration is not an issue for reinforced concrete floor systems. Because of the inherent mass and stiffness of such systems, this perception is generally true. However, there can be situations where the effects of vibration are one of the main design issues that need to be addressed. In this general overview, simplified methods are provided that can be used in a preliminary analysis to determine approximate fundamental vibration characteristics, which can help in choosing a suitable floor system for a given set of conditions. …

Apr, 2015 By David A. Fanella, Ph.D., S.E., P.E., F.ACI, F.ASCE, F.SEI and Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI In Articles, Structural Design Comments 2

ACI Resources for Concrete Buildings of Moderate Size and Height

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Sep, 2012 By Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI In Articles, Guest Column Comments 0

Voided Two-Way Flat Plate Slabs

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Apr, 2009 By Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI In Articles, InFocus

Kipling’s Tribute

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Dec, 2008 By Mike Mota, Ph.D., P.E., SECB, F.ACI, F.ASCE, F.SEI In Articles, InFocus

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