Shahraki, M., sohrabi, M.R., Azizian, Gh., Narmashiri, K.. (1398). Reliability Assessment of CFRP-Strengthened Deficient Steel SHS Columns. نشریه مهندسی عمران امیرکبیر, 3(1), 23-36. doi: 10.22060/ajce.2018.14939.5506
M. Shahraki; M.R. sohrabi; Gh. Azizian; K. Narmashiri. "Reliability Assessment of CFRP-Strengthened Deficient Steel SHS Columns". نشریه مهندسی عمران امیرکبیر, 3, 1, 1398, 23-36. doi: 10.22060/ajce.2018.14939.5506
Shahraki, M., sohrabi, M.R., Azizian, Gh., Narmashiri, K.. (1398). 'Reliability Assessment of CFRP-Strengthened Deficient Steel SHS Columns', نشریه مهندسی عمران امیرکبیر, 3(1), pp. 23-36. doi: 10.22060/ajce.2018.14939.5506
Shahraki, M., sohrabi, M.R., Azizian, Gh., Narmashiri, K.. Reliability Assessment of CFRP-Strengthened Deficient Steel SHS Columns. نشریه مهندسی عمران امیرکبیر, 1398; 3(1): 23-36. doi: 10.22060/ajce.2018.14939.5506

Reliability Assessment of CFRP-Strengthened Deficient Steel SHS Columns

AUT Journal of Civil Engineering
مقاله 3، دوره 3، شماره 1، شهریور 2019، صفحه 23-36    اصل مقاله (2.02 M)
نوع مقاله: Research Article
شناسه دیجیتال (DOI): 10.22060/ajce.2018.14939.5506
نویسندگان
M. Shahraki1؛ M.R. sohrabi1؛ Gh. Azizian1؛ K. Narmashiri* 2
1Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran
2Department of Civil Engineering, Zahedan Branch, Islamic Azad University, Zahedan, Iran
چکیده
Civil engineers have always been vexed by such numerous problems such as buckling, corrosion, bending, and over-loading in damaged steel structures. The present study is aimed to evaluate the effects of the axial loading, axial displacement, stiffness and deficiency location on the length of the deficient steel SHS columns have been evaluated based on a detailed parametric study. Three specimens were tested to failure under axial compression in the lab and simulated using the Finite Element (FE) numerical approach and a total of 100 samples were analyzed by ABAQUS using the MATLAB software to predict the suitable limit state functions and determine the best R2 value through such soft computing techniques as the Artificial Neural Networks, Adaptive Neuro-Fuzzy Inference System, Response Surface Method, and Gene Expression Programming. Finally, the failure probability and reliability index were obtained by the FORM and Monte Carlo methods on the suggested limit state functions. Results indicated that using CFRP sheets reduced the stress in the damaged location and appropriately prevented or delayed local deformations around the deficient location. So, strengthening steel columns with CFRP can play a significant role in enhancing the rate of the critical load and β, and reducing (Pf ), in deficient columns.
کلیدواژه‌ها
Square Hollow Section (SHS) Steel Column؛ Deficient؛ CFRP؛ Reliability Assessment؛ Probability Failure
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