Projects : Task Order 11

SUMMARY

Improved Structural Response Modification Factors for Seismic Design of New Buildings - Phase I

The primary objective of this task is to develop a framework for alternative formulations for response modification factors (R, C_d, Ω₀) that consider the interdependency of period, ductility, overstrength, site classification, seismic design category, and/or occupancy category. Under this project, analytical studies will be carried out to define the seismic response modification factors in variable terms in order to facilitate uniform risk. Areas of research that are needed to further improve alternative response modification factors will also be identified.

Project Director:
Charlie Kircher, Kircher and Associates, Palo Alto, California

Project Technical Committee:
• Structural engineering researcher with experience in nonlinear response history analysis and code development – Gregory Deierlein, Department of Civil Engineering, Stanford University, Stanford, California;

• Structural engineering researcher with extensive experience in nonlinear response history analysis – Laura Lowes, University of Washington;

• Structural engineering practitioner with extensive experience in building design and code development - James Harris, James R. Harris and Company, Denver, Colorado;

• Structural engineering practitioner with extensive experience in building design and code development – William Holmes, Rutherford & Chekene Structural Engineers, San Francisco, California;

• Representative from the ASCE 7 Standards Committee on Minimum Design Loads for Buildings and Other Structures – John D. Hooper, Magnusson Klemencic Associates, Seattle, Washington;

• An additional structural engineering researcher with extensive experience in nonlinear response history analysis – Finley Charney, Virginia Polytechnic Institute, Blacksburg, Virginia.

Project Review Panel:
• Robert E. Bachman, RE Bachman Consulting, Laguna Niguel, California

• Ronald Hamburger, Simpson Gumpertz & Heger, San Francisco, California

• Richard Klingner, Department of Civil Engineering, University of Texas, Austin (representative of the National Concrete Masonry Association)

• Greg Kingsley, KL&A Inc., Denver, Colorado (practitioner specializing in masonry design and code development)

• Phillip Line, URS Corporation, Washington, DC (representative of the American Forest & Paper Association)

• Kelly Cobeen, Wiss Janney Elstner Associates Inc., Emeryville, California (practitioner specializing in wood design and code development)

• Bonnie Manley, American Iron and Steel Institute, Walpole, Massachusetts

• James Malley, Degenkolb Engineers, San Francisco, California (practitioner specializing in steel design and code development)

• Laurence Novak, Portland Cement Association, Skokie, Illinois

• Jack Moehle, University of California, Berkeley (researcher specializing in concrete design and code development)

• Charles Roeder, Department of Civil Engineering, University of Washington, Seattle

• Kurt Stochlia, International Code Council Evaluation Service (ICC ES), Whittier, California