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05.32: Experimental and numerical study on the collapse behavior of an all‐steel accordion force limiting device
Author(s) -
Poursharifi Maryam,
Abedi Karim,
Chenaghloua Mohammadreza
Publication year - 2017
Publication title -
ce/papers
Language(s) - English
Resource type - Journals
ISSN - 2509-7075
DOI - 10.1002/cepa.173
Subject(s) - buckling , structural engineering , accordion , limiting , materials science , brittleness , composite material , engineering , mechanical engineering , computer science , world wide web
Space structures are widely used to cover areas with no or few intermediate columns. These structures possess important features such as light weight, elegant appearance, fast production as well as ease of erection. Beside all these advantageous, space structures are prone to the progressive collapse, which more often occurs due to failure of compression members. Force limiting devices are used to alter space structure compression members' brittle post‐buckling behaviour to elastic‐perfectly plastic post buckling behaviour. In this study, an innovative type of all‐steel force limiting device is introduced. This force limiting device is designed based on buckling restrained braces and accordion metallic damper and called Accordion Force Limiting Device (AFLD). This force limiting device is consisted of accordion core, encasing and ball joints. Accordion core maximizes load bearing capacity while encasing prevents device from buckling. This device can assembled and disassembled very fast, so damaged members can substitute easily. One all‐steel Accordion Force Limiting Device (AFLD) were designed, constructed and tested under axial compressive loading. Results indicate that AFLD modifies brittle buckling behaviour of compression members. Also, a parametric study is carried out to improve AFLD behaviour. Numerical models are developed to investigate the effects of core material and the gap size between core and encasing.