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ROBUSTNESS, REDUNDANCY AND PROGRESSIVE COLLAPSE OF FIXED OFFSHORE STRUCTURES
Author(s) -
Refachinho Miguel,
Rigueiro Constança,
Martins João Pedro,
Matos Rui
Publication year - 2017
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.552
Subject(s) - robustness (evolution) , eurocode , computer science , reliability engineering , submarine pipeline , progressive collapse , structural engineering , engineering , reinforced concrete , geotechnical engineering , biochemistry , chemistry , gene
Summary The purpose of this paper is to present an evaluation of the robustness of fixed offshore structures, through the understanding of, i) major historical accidents, and its repercussions in the codes and regulations, ii) review the methods used to assure robustness, with special focus in offshore standards, but also with civil Eurocodes; iii) Robustness assessment and measurement and, iv) which factors and mechanical properties of structures influences robustness. To be able to measure the Robustness of a structure under accidental or unforeseen events it is necessary to quantify its ultimate capacity and establish its post collapse behaviour. Therefore, a case study consisting of Non‐Linear analysis (pushover) of a four‐legged jacket is developed using USFOS software, where several structural properties are made variable and the effect in the robustness is measured.