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PERFORMANCE
BASED DESIGN USING NONLINEAR ANALYSIS
Friday, May 4th
Arledge Cinema
Lerner Hall, Columbia University
115th and Broadway
New York, NY 10027
Instructor: Dr. Graham H. Powell
Professor Emeritus of Civil Engineering
University of California at Berkeley
Register by April 6th to save $100!
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Computers
& Structures, Inc.
is proud to present “Performance Based Design using Nonlinear
Analysis”. This intense and practical seminar is intended
for structural engineers, building officials, educators and students with
an interest in performance based design using nonlinear structural analysis.
The seminar provides both an overview of the process and detailed information
on practical application.
Engineers have long recognized that earthquake loads cause nonlinear
behavior in structures, but the design process has considered nonlinear
behavior only implicitly. Recent developments in computer software make
it practical to consider nonlinear behavior explicitly, and hence more
accurately. When nonlinear analysis is combined with performance based
design, structures of many types can be designed more rationally and economically.
The calculations can be done on a desktop computer, even for very large
structures.
The seminar starts with a comprehensive overview of performance based
design; continues with two sessions that provide specific information
and recommendations on nonlinear modeling and performance assessment for
frame and shear wall structures; and concludes with a session that explains
the procedures and assumptions for nonlinear structural analysis, including
both static push-over and step-by-step dynamic analysis.
The seminar is based on the computer software program Perform-3D. This
program is specifically intended for performance based design for earthquake
resistance, not just nonlinear analysis. It provides unparalleled capabilities
for building nonlinear models, specifying component strength and deformation
capacities, calculating demand-capacity ratios, and presenting the results
in compact form for decision making. It has been used for the earthquake
resistant design of many buildings, for both retrofit and new construction.
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SEMINAR
SCHEDULE & CONTENT 7:30-8:30
REGISTRATION AND CONTINENTAL BREAKFAST
8:30-8:45
WELCOME AND FOREWARD
The Nonlinear Analysis Capabilities of CSI Products
A Perspective - Present & Future
8:45-10:15
SESSION 1 : OVERVIEW
Graham Powell
Introduction to performance assessment using nonlinear analysis.
Overview of Perform-3D capabilities.
Important aspects of nonlinear behavior.
Deformation based design, performance based design, and capacity design.
The role of structural analysis.
Practical modeling for nonlinear analysis. FEMA 356 criteria.
Performance assessment :
Demand-capacity ratios and limit states.
Performance assessment using push-over analysis.
Performance assessment using dynamic analysis.
Demonstrations of performance assessment using Perform-3D.
10:15-10:45
SNACK BREAK
10:45-12:15
SESSION 2 : FRAME STRUCTURES
Graham Powell
Practical modeling and performance assessment for frame structures.
Includes bending, shear, P-M interaction and connections.
Nonlinear models for steel and concrete beams and columns.
Performance assessment for beams and columns. FEMA 356 criteria.
Beam-to-column connections, including fracturing connections.
Shear links, connection panel zones, diagonal braces.
Demonstrations of modeling and performance assessment using Perform-3D.
12:15-1:30
LUNCH
1:30-3:00
SESSION 3 : SHEAR WALLS
Graham Powell
Practical modeling and performance assessment for shear walls.
Includes coupled walls and 3D shear cores.
Modeling of axial-bending behavior. Fiber cross sections.
Modeling of shear behavior.
Coupling beams and panels.
Finite element meshes. Common misconceptions.
Performance assessment for bending and shear. FEMA 356 criteria.
Demonstrations of modeling and performance assessment using Perform-3D.
3:00-3:30
SNACK BREAK
3:30-4:30
SESSION 4 : NONLINEAR ANALYSIS
Graham Powell
More detailed review of nonlinear analysis methods and assumptions.
Displacement controlled method for static push-over analysis.
Step-by-step method for dynamic analysis.
The feasibility of dynamic analysis.
Hysteresis loops and cyclic degradation.
Rayleigh and modal damping.
4:30-5:00
SESSION 5 : QUESTIONS AND ANSWERS
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SEMINAR
LOCATION, DATE & REGISTRATION PROCEDURE
The seminar will be held on Friday, May 4, 2007
Arledge Cinema
Lerner Hall, Columbia University
115th and Broadway
New York, NY 10027
Click
Here for HOTEL INFORMATION
Space is limited.
To participate please register early.
REGISTRATION FEES
On or Before April 6, 2007 - $595
After April 6, 2007 - $695
Registration Deadline - April
27, 2007
GROUP DISCOUNT
Five or more attendees from the same company
- $495 per person.
Groups must use the registration
form, one form per person.
Online registration not available. Group discount offer expires April
6, 2007.
Registration Fee includes continental breakfast, lunch, and coffee break
refreshments.
All attendees will also receive seminar notes containing images of the
seminar presentation with added commentary and copies of pertinent papers.
Also included is a CD containing the demo version of the CSI Perform-3D
Software.
Your registration will be confirmed by return email.
CLICK HERE for
HOTEL INFORMATION
| CANCELLATION POLICY
Cancellations received in writing on or before April 27 will be
refunded in full less a $100 processing fee. Cancellations received
after April 27 will not be refunded. Registrations are fully transferable
and we encourage you to send a colleague in your place. Please send
correspondence regarding cancellation or substitutions to education@csiberkeley.com. |
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ABOUT DR. GRAHAM H. POWELL
Professor Powell has over forty years of experience in the research,
teaching and practice of structural engineering, with emphasis on nonlinear
computer analysis. He is a Professor Emeritus of Civil Engineering at
the University of California at Berkeley, where he was an active faculty
member from 1966 through 1994. Professor Powell is also a member of
the CSI development staff, helping to enhance and integrate nonlinear
technology into CSI’s popular structural analysis and design packages,
SAP2000® and ETABS®.
ABOUT CSI
Founded in 1975, Computers & Structures, Inc., (CSI) is recognized
worldwide as the innovative leader in the development of software tools
for the analysis and design of structures. CSI products: SAP2000®,
ETABS® and SAFE® are used by thousands of engineering firms
involved in the design of building, bridges and other major projects
in over 160 countries ~ from the Petronas Towers in Kuala Lumpur to
the New Freedom Tower in New York to the 150+ story Burj-e-Dubai in
the UAE. The choice of sophisticated design professionals ~ worldwide!
Innovations from CSI continue to set the industry standard in numerical
methods, engineering, interfaces and integration. CSI software offers
unequaled levels of usability and productivity, integrating all aspects
of engineering modeling, analysis, design, detailing, and drawing within
consistent and easy-to-use interfaces.
With its uniquely qualified staff of professional structural engineers
and researchers, supported by its worldwide involvement in the structural
engineering community, CSI has long been at the forefront of software
development. This is as true today as it was in 1975; and when licensing
CSI software, you can be confident that you are using the finest structural
software available, backed by a company with an unmatched record of
innovation, and an unrivaled commitment to meet the ever-evolving needs
of the profession.
ABOUT PERFORMANCE BASED DESIGN
In earthquake resistant design, as currently practiced for most structures,
certain levels of performance are implied. These are the ability of
the structure to resist minor earthquakes with no damage; moderate earthquakes
with minor damage; major earthquakes with significant damage but minor
risk to life safety; and the most severe earthquakes without collapse.
The goal of performance based design is to make the level of performance
more explicit, in order to provide better risk management and to give
owners more choice.
The concepts of performance based design are well established (see,
for example, the SEAOC Vision 200 report). Methods for its implementation
have been specified in the ATC 40, FEMA 273, FEMA 356 reports and the
ASCE 41 standard. In many respects these methods are not too different
from conventional design methods. However, they also allow methods of
structural analysis and performance evaluation that are very different
from conventional methods. In particular, they allow the use of nonlinear
structural analysis, together with deformation-based design criteria.
Nonlinear structural analysis is more complex than linear analysis.
However, with modern computer software such as CSI PERFORM-3D, it is
feasible to use nonlinear dynamic analysis for the design of large structures,
leading to better and more reliable performance, often at lower cost.
The current methods for performance based design account rationally
for different levels of performance, but do not explicitly calculate
risk probabilities. Ongoing research, especially at the Pacific Earthquake
Engineering Research Center (PEER), is setting the stage for future
methods that will explicitly calculate risk. In the future, computer
software such as PERFORM-3D will incorporate these more advanced methods.
The seminar focuses on the use of nonlinear structural analysis for
performance based design. There are two key aspects, namely (1) modeling
for nonlinear analysis and (2) performance evaluation using a combination
of deformation-based and strength-based criteria. The seminar covers
these topics in depth, for both frame and shear wall structures. For
engineers who are familiar with performance based design concepts, the
seminar provides detailed information on practical modeling and performance
evaluation. For engineers who are not familiar with the concepts, the
first session of the seminar provides a clear overview of the present
state-of-the-art. To use a program such as PERFORM-3D it is not necessary
to know much about the computational details of nonlinear analysis.
However, for engineers who are interested in those details, the fourth
session covers them in some depth.
SAP2000, ETABS, SAFE and PERFORM are Registered Trademarks of Computers
and Structures, Inc.
CONTACT
Computers & Structures, Inc.
1995 University Avenue, Suite 540
Berkeley, California 94704
Tel: (510) 845-2177
Fax: (510) 845-4096
e-mail: education@csiberkeley.com
web: http://www.csiberkeley.com
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