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February 10, 2012; 9 am – 11 am Pacific Time Speakers: M. Saiidi, Ph.D., P.E. & Ahmad M. Itani, Ph.D., P.E., S.E. This web seminar consists of two parts, one on highlights of seismic design codes for highway bridges and the other on new developments in accelerated bridge construction (ABC) and innovation in areas of moderate to high seismicity. The first part discusses the seismic design of highway bridges according to the AASHTO LRFD Bridge Design Specifications, 4th Edition including 2011 Interim Revisions and Guide Specifications for LRFD Seismic Bridge Design, 1st Edition, where applicable. The basics of seismic design principles and seismic design philosophies (force- and displacement-based) are presented and discussed. Earthquake resisting systems and design strategies for bridge systems with integral caps and dropped caps are presented. The earthquake resisting systems for bridges in Seismic Zones 3 or 4 are classified into one of the following two categories : Type 1 — an elastic superstructure with a ductile substructure or Type 2 — an elastic superstructure and substructure with a fusing mechanism at their interface; these are discussed in detail. Design and checks on the seismic forces and displacements for earthquake resisting elements are discussed. In the second part, emerging information on seismic connection details is presented, and design for ABC, including alternatives in column-footing and column-pier cap connections and segmental columns, is explained. Feasibility of different coupler types and recent large-scale experimental test data are briefly discussed. Emphasis is placed on connections that emulate cast-in-place construction. Recent developments in the application of advanced materials to improve seismic performance of highway bridges are also highlighted. Materials with unique properties such as shape memory alloys, engineered cementitious composites, fiber-reinforced polymer composite tubes and fabrics, and built-in elastomeric segments are discussed along with a demonstration of their performance in large-scale bridge models and components tested on shake tables under simulated ground motions. The web seminar will also include three question-and-answer periods. Speakers Bio: M. “SAIID” SAIIDI, Ph.D., P.E.: Dr. Saiidi is a professor, Department of Civil and Environmental Engineering, University of Nevada, Reno and is a licensed professional engineer in the States of California and Nevada. He was formerly Director, Undergraduate Research and Chairman, Department of Civil and Environmental Engineering at the University of Nevada, Reno. He has been extensively involved in the following research areas: earthquake engineering of bridges and buildings; experimental studies of bridges and components; analysis and design of reinforced concrete structures; and innovative materials in earthquake resistant structures. He has authored numerous publications and has received many prestigious awards. He is a recognized authority in the field of seismic design of bridges. Ahmad M. Itani, Ph.D., P.E., S.E.: Dr. Itani is Professor, Department of Civil and Environmental Engineering, University of Nevada, Reno and is a licensed professional engineer in the States of California and Nevada and licensed structural Engineer in the State of California. He has been teaching at the University of Nevada since 1994 and prior to that he was a bridge engineer for the California Department of Transportation. He has authored many publications and is a popular invited lecturer nationwide. He has received numerous awards, the most recent being the AISI/AASHTO-Richard S. Fountain Award.
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