Research
Objective
Investigate the
application of the Direct Strength Method (DSM) to structural steel
shapes, and to provide the necessary research advances to make this a
viable option for the design of noncompact and slender structural steel
shapes. A goal of DSM is to provide a design method which is robust
enough to allow engineers to realistically explore novel crosssections,
yet make this exploration simple. Investigate the potential of DSM to
take a fresh look at hotrolled steel structural shapes.
Work Products
Proposal (pdf
 February 2005)
Progress Report #1
(pdf  June 2007)
Progress Report #2
(pdf
 April 2008)
AISC Comm. on Resaerch
talk (pdf
 April 2008)
SSRC Stability
Conference (paper
talk  April 2008)
Progress Report #3
(pdf
 April 2009)
SSRC Stability
Conference (paper
 April 2009)
Structures Congress
(paper
 April 2009)
Progress Report #4
(pdf
 May 2010)
SSRC Stability
Conference (paper
 May 2010)
Eng. Mech Inst. Conf
(talk  August
2010)
JCSR Paper (link
to journal page)
please email
schafer@jhu.edu if doc or ppt files are needed insted of pdf
Related Links
CUFSM
constrained Finite Strip Method
Direct Strength Method
for ColdFormed Steel
Reliability and
Advanced Analysis of Steel Frames
Frame design/robustness
under unforeseen events

Education
Objective
Provide tools, tutorials, and educational aids related to
crosssection stability of structural steel shapes so that educators,
students, and engineers may explore these concepts more readily. Provide
educational aids appropriate for courses in steel design using
structural steel at the undergraduate and graduate levels.
Work Products
CUFSM, software for
crosssection stability analysis
Example files for structural steel shapes
W36x150, W14x120, C5x9, L4x4x1/2, WT 18x150,
HSS 4x4x1/2 (all example files in a zip
folder)
Tutorial 1: Crosssection stability of a W36x150 using
the finite strip method (ppt)
(pdf)
Learning objectives: (1) Identify all the buckling modes in a
Wsection, for columns explore flexural (Euler) buckling and
local buckling, for beams explore lateraltorsional buckling and
local buckling; (2) Predict the buckling stress (load or moment)
for identified buckling modes, (3) Learn the interface of a
simple program for exploring crosssection stability of any AISC
section and learn finite strip method concepts such as
halfwavelength of the bucking mode buckling load factor
associated with the applied stresses. (see below for related
exercises)
Tutorial 2: Crosssection stability of a W36x150
exploring higher modes and the
interaction of modes (ppt)
(pdf)
Learning objectives: (1) understand the
role of “higher” buckling modes in the analysis of a Wsection,
including how higher buckling modes relate to strongaxis,
weakaxis, and torsional buckling in columns, what higher
buckling modes mean for local buckling, and when knowledge of
higher buckling modes may be useful in design; (2) Understand
how interaction of modes may be identified and quantified using
CUFSM for a Wsection (note target audience of this tutorial is
advanced undergrad/beginning grad).
Tutorial 3: Exploring how crosssection changes
influence crosssection stability  an
extension to Tutorial #1 (ppt)
(pdf)
Learning objectives: study the impact of flange width, web
thickness, and flangetoweb fillet size on a W36x150 section,
learn how to change the crosssection in CUFSM, learn how to
compare analysis results to study the impact of changing the
crosssection. (see below for related exercises)
Exercises: Homework exercises related to Tutorials 1
and 3 on crosssection stability (doc)
Exercises include simple homework problems that
cover tutorials 1 and 3, as well as homework problems that
require the student to apply the knowledge from tutorials 1 and
3, in addition homework exercises related to the other W, C, L,
WT, and HSS are provided and some simple group problems that
require a fuller exploration of crosssection stability of
structural shapes.
Related Links
Professor Schafer's Undergraduate Steel Course
Course web site
Learning Objectives
Lecture Materials
