Friday, May 25, 2012

ASEP Continuing Education Lecture: Design of Structural Steel Members using LRFD


ASEP Continuing Education Summit 2012 invites you to a lecture on:
What: CEL-04: Design of Structural Steel Members using LRFD
When: June 9, 2012
Time: 11:00 – 12:30
Where: La Breza Hotel, QC
Who: Resource Speaker – Alfredo B. Juinio, Jr., F.ASEP

About the Lecture:
                                                     
The main objective of structural engineering design is to produce a safe and economical structure that will serve its intended purpose.  Safety in this context is primarily provided by ensuring that the structure’s strength is sufficient to resist the maximum load actions that may act during the life of the structure.  However, the determination of strength of the structure and values of the loads are at best only estimates.  Because of uncertainties in the strength and load actions, design specifications generally prescribe a generally accepted design methodology to ensure that the probability of the strength being less than the load actions is small.

Historically, the Working Stress Design Method (WSD) was the most prevalent.  In the past few decades, this has been supplanted by the Load and Resistance Factor Design (LRFD) Method.   In the current National Code of the Philippines (NSCP 2010 Volume I, Buildings, Towers and other Vertical Structures, 6th Edition), the provisions of the 2005 specifications of the American Institute of Steel Construction, Inc (AISC) were adopted for Chapter 5 on Structural Steel.  These specifications prescribe the use of the LRFD and the Allowable Strength Design (ASD) Methods.

The lecture will cover discussions on uncertainties in the determination of strengths and load actions, margin of safety, load factors and load combinations, strength reduction factors, and the concept of limit states.  Limit states are conditions beyond which the structure or structural component ceases to fulfill its intended function.  Aside from the use of partial factors for loads and strength, as opposed to a single factor of safety in the WSD, the adoption of the limit state design philosophy into the LRFD is probably the most important improvement of the LRFD.  A qualitative overview of the limit states and codal provisions for structural steel members in tension, compression and flexure shall also be presented.

About the Lecturer:

Alfredo B. Juinio Jr., FASEP, is a Professor, Institute of Civil Engineering of the University of the Philippines Diliman.

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