Seismic retrofiting of an existing steel structure

Campian Cristina, Maria Pop, Corneliu Cismasiu, Josza Timea, Anca Popa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The primary aim of earthquake resistant design is to prevent building collapse during the seismic event, but severe earthquakes have a low probability of occurrence during the life time of the structure, therefore in contrast to traditional structural design in earthquake design, structures are permitted to work in post-elastic domain under seismic load. It would require a large lateral stiffness of the structure and an expensive resisting system to design the building to have an elastic response. Because of these arguments in case of regular, conventional buildings it is more reasonable to design the structures counting on their ductility capacity, but buildings with a significant importance make an exception and they must be designed to not exceed the elastic domain. Buildings which enter into this category are hospitals, buildings with historical importance, fire stations, structure of larger water tanks, any building which has an importance in emergency situation etc. This paper intends to exam and evaluate the performance of buckling restrained braces implemented as a seismic rehabilitation technique. BRBs are considered to be efficient in increasing the resistance of a structure against horizontal loads and providing an additional energy dissipation capacity. An attempt is made to evaluate and analyze this quantity of added stiffness and energy dissipation by means of comparison of structural response and fragility curves. Because adding braces to a structure modifies the structural system and behavior of the structure 3 different structure were analyzed the original structure, structure with conventional braces and structure with BRBs. In this way a fair evaluation can be accomplished, the retrofitting structure by means of BRBs can be compared to the original structure and to the structure with conventional braces which has the same structural scheme as BRBF structure.

Original languageEnglish
Title of host publication17th International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM 2017
Place of PublicationVarna, Bulgaria
PublisherInternational Multidisciplinary Scientific GeoConference & EXPO SGEM
Pages401-408
Number of pages8
DOIs
Publication statusPublished - 2017
Event17th International Multidisciplinary Scientific GeoConference - Albena Resort, Varna, Bulgaria
Duration: 27 Jun 20176 Jul 2017
https://www.sgem.org/

Publication series

NameInternational Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
Number62
Volume17
ISSN (Print)1314-2704

Conference

Conference17th International Multidisciplinary Scientific GeoConference
Abbreviated titleSGEM 2017
CountryBulgaria
CityVarna
Period27/06/176/07/17
Internet address

Keywords

  • Collapse
  • Earthquake
  • Resistance

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    Cristina, C., Pop, M., Cismasiu, C., Timea, J., & Popa, A. (2017). Seismic retrofiting of an existing steel structure. In 17th International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM 2017 (pp. 401-408). (International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM; Vol. 17, No. 62). Varna, Bulgaria: International Multidisciplinary Scientific GeoConference & EXPO SGEM. https://doi.org/10.5593/sgem2017/62/S26.051