Lecture
This lecture covers inelastic response spectra in seismic engineering design codes, focusing on the behaviour factor q, detailing rules, and the relationship between elastic and inelastic systems. It also discusses the refined concept of q in the New Eurocode 8, the design spectra in the Swiss code SIA 261, and the behaviour factors for different types of buildings. Examples of construction works classes and their importance factors are presented, along with a practical design question for a bridge pier in a seismic zone.