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THE STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS

Whereas current building codes legally apply to seismic design of tall buildings, their prescriptive provisions do not adequately address many critical aspects. Performance-based engineering provides a desirable alternative. Application of performance-based procedures requires: an understanding of the relation between performance and nonlinear modeling; selection and manipulation of ground motions appropriate to design hazard levels; selection of appropriate nonlinear models and analysis procedures; interpretation of results to determine design quantities based on nonlinear dynamic analysis procedures; careful | THE STRUCTURAL DESIGN OF TALL AND SPECIAL BUILDINGS Struct. Design Tall Spec. Build. 15 495-513 2006 Published online in Wiley Interscience www.interscience.wiley.com . DOI 10.1002 tal.378 SEISMIC ANALYSIS DESIGN AND REVIEW FOR TALL BUILDINGS JACK P. MOEHLE Pacific Earthquake Engineering Research Center University of California Berkeley California USA SUMMARY Whereas current building codes legally apply to seismic design of tall buildings their prescriptive provisions do not adequately address many critical aspects. Performance-based engineering provides a desirable alternative. Application of performance-based procedures requires an understanding of the relation between performance and nonlinear modeling selection and manipulation of ground motions appropriate to design hazard levels selection of appropriate nonlinear models and analysis procedures interpretation of results to determine design quantities based on nonlinear dynamic analysis procedures careful attention to structural details and peer review by independent qualified experts to help assure the building official that the proposed materials and system are acceptable. These topics are discussed with an emphasis on tall buildings. Copyright 2006 John Wiley Sons Ltd. 1. INTRODUCTION A trend in the seismic design of tall buildings is to use performance-based approaches that rely on nonlinear dynamic analysis to simulate expected earthquake response. While guidelines FEMA 356 2000 LATB 2006 and code requirements ASCE 2002 IBC 2003 UBC 1997 exist there still remain many undefined aspects for which additional guidance would be helpful. Providing such guidance must be done tentatively as much of nonlinear analysis is still an art rather than a strict science. Ongoing studies will continue to improve our understanding of the requirements for nonlinear analysis in support of performance-based earthquake engineering in the years ahead but even if the field of nonlinear analysis was fully studied there still would