Presenters:
Roy A. Imbsen, P.E., D.Eng.
Robert Tovani, M.S., P.E., S.E.
Atif Habibullah, P.E.

Computers & Structures, Inc. is pleased to present a two-day seminar on the seismic design of bridges using BrIM/SAP2000. This seminar will detail a step-by-step seismic design procedure for the new AASHTO Seismic Guide Specifications. Developed specifically for bridge engineers, the presentation will highlight the powerful and practical seismic design capabilities of BrIM/SAP2000.

BrIM/SAP2000 will automatically set the design procedures based upon the AASHTO seismic design category of the bridge. Demand is computed from a linear dynamic response-spectrum analysis. Capacity may be determined from the AASHTO Guide Specifications or from a full nonlinear static pushover analysis, as appropriate. Demand-capacity ratios are computed and reported along with other pertinent design information in a complete formatted design report. Cracked section properties for the columns are automatically calculated from the dead load analysis.

Practical details of these steps will be illustrated with a 4-span concrete bridge example that will demonstrate how various complex steps are streamlined and integrated via the simple user interface of BrIM/SAP2000.

Please register early, as space is limited!

     

Seminar Outline

DAY ONE

Introduction to the new AASHTO Guide Specifications
· History and milestones of code development
· Brief comparison of current and the new guide specifications
· Seismic performance of bridges and past earthquakes
· Applicability of the Guide Specifications
· Seismic hazard and performance criteria
· Global seismic design strategies
· Description of the Story Line Bridge

Review of Fundamental Concepts in Structural Dynamics
· Analysis Procedures
· Free Vibration
· Structural Damping
· Response Spectrum Definition
· Single degree and multi-degree-of-freedom systems

AASHTO Seismic Design Hazard
· New AASHTO/USGS Ground Motion Maps
· Design Spectrum using the Three Point Method
· Site Class Definition
· Seismic Design Category Designations

Computer Modeling using SAP2000
· Practical modeling guidelines
· Equivalent static force methods
· Single degree and multi-degree-of-freedom systems
· Development of Bridge Model for the Story Line Bridge using BrIM
· Seismic Response Spectrum using the AASHTO/USGS Maps
· Modeling Bridge Components
· Seismic Response Analysis
· Report Writer

Capacity Displacement - Concrete Columns and Piers
· Seismic Design Categories B & C using explicit formulas
· Seismic Design Category D using pushover analysis

MORNING

Seismic Response Analysis using SAP2000
· SAP2000 modeling techniques and boundary condition options
· Superstructure and substructure modeling
· Concrete and steel component design
· Seismic Response Analysis of the Story Line Bridge
· Section Analysis
· Pushover Analysis
· Reported seismic demands for design

LRFD Guide Specifications - Design Requirements
· Seismic Design Categories SDC A, B, C and D
· Earthquake Resistant Systems (ERS)
· Member Ductility
· Capacity Design
· Minimum Support Length
· Capacity Protected Members
· Column Shear Capacity
· Joint Design
· Shear Key Design

Concluding Remarks and General Discussion

AFTERNOON

Guest Speakers:
Tony Allen, Chief Geotechnical Engineer, WSDOT
Lee Marsh, Senior Project Manager, BERGER/ABAM Engineers

WSDOT Discussion
· Discussion of 2008 AASHTO Ballot Items

Revised LRFD Seismic Provisions
· Background
· Span length ballot item
· Liquefaction ballot item
· Guide specification revision
· Parking lot items
· Soil liquefaction issues
· Lateral spreading loads
· Deep foundation issues

Seminar Location:
Comfort Inn of Tumwater
1620 74th Ave. SW
Tumwater, WA 98501

Seminar Schedule:
Monday and Tuesday, September 15-16, 8:30 am – 4:30 pm. Registration will begin at 8:00 am. Each day of the seminar will have four 90 minute sesions with mid-morning and afternoon coffee breaks and lunch. Break Refreshments and lunch will be provided.

Accommodations:
Seminar participants are encouraged to reserve a room at the Comfort Inn of Tumwater. Call (360) 596-9100 or visit www.comfortinn.com for reservations. Accommodations are not included in your registration fee.

About the Seminar Instructors

Roy A. Imbsen, P.E., D.Eng., M.ASCE, President of Imbsen Consulting, Sacramento, California, has over 45 years of bridge engineering experience, the first 15 of which were spent with Caltrans, Division of Structures. A world-recognized expert in the field of seismic bridge engineering and bridge design, Dr. Imbsen helped develop and conduct the one-week FHWA course on seismic design of bridges. He is a member of the Task Force for Highway Structure Seismic Design Damage Investigations of the Earthquake Engineering Research Institute, Committee on Natural Disasters Investigations of the National Research Council, Committee on Concrete Bridges of the Transportation Research Board, and of ASCE.

Robert Tovani, M.S., P.E., S.E. is the Director of Verification/ Validation and Training at CSI and has help train numerous engineers to use SAP2000. Mr Tovani has more than 25 years of experience in the design and analysis of buildings and bridges using SAP2000. His seismic design experience includes the linear and nonlinear analysis for both static and dynamic applications. His training experience includes training seminars and on-site training classes.

Atif Habibullah, P.E. is the Director of Educational Services at CSI and has extensive experience using CSI products (SAP2000, ETABS and SAFE). He has been conducting on-site and online educational and training seminars through CSI Educational Services. He has a strong background in the modeling of structural systems, solving special modeling problems and in the interpretation of analysis results. Prior to working at CSI, Atif worked at a leading design firm for four years using CSI products, particularly in the design of multi-story steel and concrete building structures such as hospitals, office buildings, towers, bridges, stadiums and dams.

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.

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