STEEL DISSIPATIVE BRACING SYSTEMS FOR SEISMIC RETROFITTING OF EXISTING STRUCT

[TAFATNEB]

S TEEL D ISSIPATIVE B RACING S YSTEMS FOR S EISMIC R ETROFITTING OF E XISTING S TRUCTURES : T HEORY AND T ESTING

Author: Mario D’Aniello | Size: 13.9 MB | Format: PDF | Quality: Unspecified | Publisher: Università degli Studi di Napoli Federico II Facoltà di Ingegneria | Year: 2007 | pages: 316

Recent earthquakes have highlighted the urgency and importance of
rehabilitating seismically deficient structures to achieve an acceptable level of
performance. This can be achieved either reducing the load effect input to the existing structures, or improving the strength, stiffness, and/or ductility. Over the past 20 years, significant advancements have been made in the research and development of innovative materials and technologies for improving the seismic performance of existing struct ures through rehabilitation processes.The seismic protection of existing struct
ures represents nowadays one of the main tasks in the field of
structural engineering.Many examples of bad and unsatisfactory
structural performance, particular in case of reinforced concrete (RC) structures, have been due to several reasons such as bad quality of material
s, rough execution, lack of appropriate design of local details and
non-respect of code provisions. Besides, even if in very few cases, several failures have also occurred in the steel buildings during the well-known 1994 Northridge and 1995 Kobe Earthquakes, due to unexpected fragile local behaviour of connections respect to the large dissipative capacity expected by stru ctural designers (Mazzolani, 2000).

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