Introduction to Seismic Essentials in Groningen Seismic Design - PowerPoint PPT Presentation

Introduction to Seismic Essentials in Groningen

Seismic Design Concepts 3.1 Capacity Design Philosophy Timurhan Timur MSc PhD - Arup

Design Philosophy A term used for the fundamental basis of design Selection or identification of design loads Analytical techniques Design procedures Structural configuration Extent of economic optimization

Strength-based Design Philosophy Gravity Load Wind Load

Strength-based Design Philosophy Force Displacement within elastic region Displacement

Strength-based vs. Reality Force Strength-based design philosophy not viable under earthquake conditions Elastic structure Structures are subjected to cyclic loads Displacement Yielding structure

Ductility Lateral displacement Force Base Shear Elastic range Inelastic range Lateral displacement

Ductile behaviour Brittle behaviour Adequate No warning (by warning (by sudden collapse) deformations and cracks Bending failure Shear failure

Ductility Lateral displacement Force Base Shear Elastic range Inelastic range Lateral displacement

Capacity Design Philosophy Control damage by selecting proper lateral load resisting systems and proper detailing of individual members Structural response often exceeds elastic range Damage is therefore expected Ductile link

Ductility Elastic range Inelastic range Base Shear Large inelastic deformation Yield point Failure Structure A Failure Structure B Lateral Displacement

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References and further reading Elnashai, A.S. and Di Sarno, L. (2008). Fundamentals of Earthquake 3.1 Engineering . Published by John Wiley & Sons. Paulay, T. and Priestley, M.J (1992). Seismic Design of Reinforced Concrete and Masonry Buildings . Published by John Wiley & Sons. EN 1998 - Eurocode 8 (2004-2005). Design of structures for earthquake resistance - Part 1: General rules, seismic Actions and rules for buildings - Part 3: Assessment and retrofit of buildings and Part 5: Foundations, retaining structures and geotechnical aspects. Published by CEN/CENELEC, Brussels.