Consolidating record selection for earthquake resistant structural design
Galasso, Carmine (2010) Consolidating record selection for earthquake resistant structural design. [Tesi di dottorato] (Inedito)
Full text disponibile come:
Seismic assessment of existing, generally under-designed, structures and of proposed design of new structures is usually based on nonlinear static (i.e., pushover) analysis procedures, but nonlinear dynamic analysis (NLDA) is now being increasingly used in assessing the seismic structural performance. In NLDA, once an appropriate and accurate model for the structure is created, the seismic demand is determined by nonlinear response history analysis of the structure for several earthquake ground motions. The issue of selecting recorded earthquake ground motions as input for NLDA is seen to be one of the most critical and it is sometimes considered more important even than structural modeling. Procedures for selecting and scaling ground motions records for a site-specific hazard are described in building codes and have been the subject of much research in recent years. As non-linear dynamic analysis becomes a more frequently used procedure in research, international codes and practice for assessing the demand on a structure due to earthquakes, ground motion selection becomes increasingly relevant. In order to select representative ground motions to effectively assess structural performance, it is important, first of all, to understand which properties of a recorded ground motion are mostly strongly related to the response caused in the structure and, consequently, have to take into account (Chapter 1). Then, it is important to develop and introduce into the practice of structural engineering, tools which may effectively help to address the basic issues related to seismic input selection, trying to reconcile research achievements and code-based practice (Chapter 2-4). Based on these remarks, the aim of this study is to consolidate the state of research and to shed some light on a number of aspects involved when selecting and, eventually, manipulating ground motions for NLDA. Practical guidance and software tools are developed and provided to the engineering community for choosing appropriate ground motions in predicting structural response by NLDA. The provisions on which the whole thesis is based are those of Eurocode 8, i.e., the main seismic design code in Europe, and the new Italian building code, one of the most advanced with respect to seismic hazard issue, at least in Europe.
Solo per gli Amministratori dell'archivio: edita il record