Study on Deformation Performances of Steel Braced Frame Structures with Random Imperfections

Abstract:

In order to research the random initial imperfections on the influence of steel braced frame structures deformation,the full-path advanced analysis by using the finite element software ANSYS for 20-story steel frame structures with the symmetrical arrangement of brace.The random initial imperfections in structural system and its individual members could be taken into account by Monte Carlo method,the lateral displacement of columns and the mid-span deflection of beams are gained according to probability statistics,and analysis method of various standards were compared.Results indicate that the ultimate deformation of steel braced frames are proportional to the size of the initial imperfections;The braced frame deformation considering random initial imperfections are closed to the results of ideal frames without imperfection.The ultimate bearing capacity calculated by advanced analysis of high-rise steel braced frame structures often does not meet the requirements of serviceability limit ,structural design ultimately controlled by the displacement limit.

• Periodical: Applied Mechanics and Materials (Volumes 644-650)
• Pages: 543-546
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.644-650.543
• Online since: September 2014
• Authors: Lu Jin*, Han Si, Lian Guang Jia
• Keywords: Deformation Performance, Monte Carlo Method, Random Initial Imperfection, Steel Braced Frame, Steel Structure

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