Code-Based Procedures for Seismic Safety Assessment and Retrofit

• Type: Chapter or Part of a Book
• Date: 2018-01-01

Authors

Xavier Romão (Author) FEUP; Andrea Penna (Author) Other

Book

Title: Strengthening and Retrofitting of Existing Structures

Pages: 301-320

ISBN: 9789811058578

Electronic ISBN: 9789811058585

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Structural engineering

Other information

DOI: 10.1007/978-981-10-5858-5_13

Abstract (EN): Earthquake engineering experts, public authorities and general public agree on the idea that the seismic safety and performance of the built environment is a matter of high priority. Moreover, the widespread interest in methodologies which address the assessment and the retrofit of existing constructions reflects the global perception that such constructions are exposed to disproportionate levels of seismic risk. Rational and cost effective interventions on the built environment are therefore needed in order to mitigate such risk and reduce the expected level of losses in future earthquakes. Since there are significant differences between the design of a new structure and the assessment of the same structure after many years in service, these interventions must be based on adequate normative documents addressing the specific issues of seismic performance assessment of existing structures. Given that most structural standards and codes have been developed for the design of new structures, their procedures are often found to be inadequate for the assessment of existing constructions. Hence, over the past few years, several standards and guidelines addressing the problem of structural assessment and upgrading have been emerging for the specific case of earthquake loading. In this context, the current chapter presents a review of existing international structural standards and codes that provide specific methodologies for the seismic safety assessment and the strengthening of existing constructions. The codes considered in this analysis are the Eurocode 8 Part 3 (EC8-3) [1], the United States International Building Code IBC 2012 [2], the International Existing Building Code IEBC 2012 [3], ASCE/SEI 41-13 [4] and relevant modifications in the upcoming 2015 editions of the IBC and IEBC, the Italian building code NTC08 [5], the Greek code of structural interventions KAN.EPE. [6], the Swiss standard SIA 269 [7], the Romanian code for seismic evaluation P100-3 [8], the Turkish standard for buildings in seismic zones [9], and the New Zealand NZSEE Recommendations [10]. The chapter presents a general description of the seismic safety assessment methods proposed by these standards, as well as an overview of the techniques they propose for seismic retrofit and strengthening. Following this comparison, the future evolution of code-based procedures for seismic safety assessment and retrofit is briefly discussed based on recently developed guidelines proposing more advanced approaches.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 20